board/mv_ebu/common/mv_hal/spi/mvSpi.c

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*******************************************************************************/

#include "mvCommon.h"
#include "mvOs.h"
#include "mvSpiSpec.h"
#include "mvSpi.h"
#include "mvSysSpi.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"

/* #define MV_DEBUG */
#ifdef MV_DEBUG
#define DB(x) x
#else
#define DB(x)
#endif


#ifndef MV_SPI_REG_BIT_SET
#define MV_SPI_REG_BIT_SET	MV_REG_BIT_SET
#endif
#ifndef MV_SPI_REG_BIT_RESET
#define MV_SPI_REG_BIT_RESET	MV_REG_BIT_RESET
#endif

#ifndef MV_SPI_REG_WRITE
#define MV_SPI_REG_WRITE	MV_REG_WRITE
#endif

#ifndef MV_SPI_REG_READ
#define MV_SPI_REG_READ		MV_REG_READ
#endif

static MV_SPI_HAL_DATA	spiHalData;

static MV_SPI_TYPE_INFO spiTypes[] = {
	{
		.en16Bit = MV_TRUE,
		.clockPolLow = MV_TRUE,
		.byteCsAsrt = MV_FALSE,
		.baudRate = (20 << 20), /*  20M */
		.clkPhase = SPI_CLK_BEGIN_CYC
	},
	{
		.en16Bit = MV_FALSE,
		.clockPolLow = MV_TRUE,
		.byteCsAsrt = MV_TRUE,
		.baudRate = _8M,
		.clkPhase = SPI_CLK_BEGIN_CYC
	},
	{
		.en16Bit = MV_FALSE,
		.clockPolLow = MV_TRUE,
		.byteCsAsrt = MV_FALSE,
		.baudRate = _8M,
		.clkPhase = SPI_CLK_BEGIN_CYC
	},
	{
		.en16Bit = MV_FALSE,
		.clockPolLow = MV_TRUE,
		.byteCsAsrt = MV_TRUE,
		.baudRate = _8M,
		.clkPhase = SPI_CLK_HALF_CYC
	},
	{
		.en16Bit = MV_FALSE,
		.clockPolLow = MV_FALSE,
		.byteCsAsrt = MV_TRUE,
		.baudRate = _2M,
		.clkPhase = SPI_CLK_HALF_CYC
	}
};

MV_SPI_TYPE_INFO *currSpiInfo = NULL;

/*******************************************************************************
* mvSpiParamsSet
*
* DESCRIPTION:
*	Set SPI driver parameters.
*	This will affect the behaviour of the SPI APIs after this call.
*
* INPUT:
*	spiId - Controller ID
*	csId - chip select ID
*	type - The type to set.
*
* OUTPUT:
*	None.
*
* RETURNS:
*	MV_OK on success,
*	MV_ERROR otherwise.
*
********************************************************************************/
MV_STATUS mvSpiParamsSet(MV_U8 spiId, MV_U8 csId, MV_SPI_TYPE type)
{
	MV_SPI_IF_PARAMS ifParams;

	if (csId > (MV_SPI_MAX_CS - 1)) {
		mvOsPrintf("Error, csId(%d) exceeded maximum(%d)\n", csId, (MV_SPI_MAX_CS - 1));
		return MV_ERROR;
	}

#if (MV_SPI_VERSION > 1)
	if (MV_OK != mvSpiCsSet(spiId, csId)) {
		mvOsPrintf("Error, setting SPI CS failed\n");
		return MV_ERROR;
	}
#endif

	if (currSpiInfo != (&(spiTypes[type]))) {
		currSpiInfo = &(spiTypes[type]);
		mvSpiBaudRateSet(spiId, currSpiInfo->baudRate);

		ifParams.clockPolLow = currSpiInfo->clockPolLow;
		ifParams.clockPhase = currSpiInfo->clkPhase;
		ifParams.txMsbFirst = MV_FALSE;
		ifParams.rxMsbFirst = MV_FALSE;
		mvSpiIfConfigSet(spiId, &ifParams);
	}

	return MV_OK;
}


/*******************************************************************************
* mvSpi16bitDataTxRx - Transmt and receive data
*
* DESCRIPTION:
*       Tx data and block waiting for data to be transmitted
*
********************************************************************************/
MV_STATUS mvSpi16bitDataTxRx(MV_U8 spiId, MV_U16 txData, MV_U16 *pRxData)
{
	MV_U32 i;
	MV_BOOL ready = MV_FALSE;


	/* First clear the bit in the interrupt cause register */
	MV_SPI_REG_WRITE(MV_SPI_INT_CAUSE_REG(spiId), 0x0);

	/* Transmit data */
	MV_SPI_REG_WRITE(MV_SPI_DATA_OUT_REG(spiId), MV_16BIT_LE(txData));

	/* wait with timeout for memory ready */
	for (i = 0; i < MV_SPI_WAIT_RDY_MAX_LOOP; i++) {
		if (MV_SPI_REG_READ(MV_SPI_INT_CAUSE_REG(spiId))) {
			ready = MV_TRUE;
			break;
		}
#ifdef MV_SPI_SLEEP_ON_WAIT
	mvOsSleep(1);
#endif /* MV_SPI_SLEEP_ON_WAIT */
	}

	if (!ready)
		return MV_TIMEOUT;

    /* check that the RX data is needed */
    if (pRxData) {
	if ((MV_U32)pRxData &  0x1) { /* check if address is not alligned to 16bit */
#if defined(MV_CPU_LE)
		/* perform the data write to the buffer in two stages with 8bit each */
		MV_U8 *bptr = (MV_U8 *)pRxData;
		MV_U16 data = MV_16BIT_LE(MV_SPI_REG_READ(MV_SPI_DATA_IN_REG(spiId)));
		*bptr = (data & 0xFF);
		++bptr;
		*bptr = ((data >> 8) & 0xFF);

#elif defined(MV_CPU_BE)

		/* perform the data write to the buffer in two stages with 8bit each */
		MV_U8 *bptr = (MV_U8 *)pRxData;
		MV_U16 data = MV_16BIT_LE(MV_SPI_REG_READ(MV_SPI_DATA_IN_REG(spiId)));
		*bptr = ((data >> 8) & 0xFF);
		++bptr;
		*bptr = (data & 0xFF);

#else
    #error "CPU endianess isn't defined!\n"
#endif

	} else
		*pRxData = MV_16BIT_LE(MV_SPI_REG_READ(MV_SPI_DATA_IN_REG(spiId)));
    }

    return MV_OK;
}


/*******************************************************************************
* mvSpi8bitDataTxRx - Transmt and receive data (8bits)
*
* DESCRIPTION:
*       Tx data and block waiting for data to be transmitted
*
********************************************************************************/
MV_STATUS mvSpi8bitDataTxRx(MV_U8 spiId, MV_U8 txData, MV_U8 *pRxData)
{
	MV_U32 i;
	MV_BOOL ready = MV_FALSE;

	if (currSpiInfo->byteCsAsrt)
		mvSpiCsAssert(spiId);

	/* First clear the bit in the interrupt cause register */
	MV_SPI_REG_WRITE(MV_SPI_INT_CAUSE_REG(spiId), 0x0);

	/* Transmit data */
	MV_SPI_REG_WRITE(MV_SPI_DATA_OUT_REG(spiId), txData);

	/* wait with timeout for memory ready */
	for (i = 0; i < MV_SPI_WAIT_RDY_MAX_LOOP; i++) {
		if (MV_SPI_REG_READ(MV_SPI_INT_CAUSE_REG(spiId))) {
			ready = MV_TRUE;
			break;
		}
#ifdef MV_SPI_SLEEP_ON_WAIT
		mvOsSleep(1);
#endif /* MV_SPI_SLEEP_ON_WAIT */
	}

	if (!ready) {
		if (currSpiInfo->byteCsAsrt) {
			mvSpiCsDeassert(spiId);
			/* WA to compansate Zarlink SLIC CS off time */
			mvOsUDelay(4);
		}
		return MV_TIMEOUT;
	}

	/* check that the RX data is needed */
	if (pRxData)
		*pRxData = MV_SPI_REG_READ(MV_SPI_DATA_IN_REG(spiId));

	if (currSpiInfo->byteCsAsrt) {
		mvSpiCsDeassert(spiId);
		/* WA to compansate Zarlink SLIC CS off time */
		mvOsUDelay(4);
	}

	return MV_OK;
}

/*
#####################################################################################
#####################################################################################
*/

#if (MV_SPI_VERSION > 1)
/*******************************************************************************
* mvSpiCsSet -
*
* DESCRIPTION:
*	Set the Chip-Select to which the next SPI transaction will be
*	addressed to.
*
* INPUT:
*       csId: The Chip-Select ID to set.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*******************************************************************************/
MV_STATUS mvSpiCsSet(MV_U8 spiId, MV_U8 csId)
{
	MV_U32	ctrlReg;
	static MV_U8 lastCsId = 0xFF;

	if (csId > 7)
		return MV_BAD_PARAM;

	if (lastCsId == csId)
		return MV_OK;

	ctrlReg = MV_SPI_REG_READ(MV_SPI_IF_CTRL_REG(spiId));
	ctrlReg &= ~MV_SPI_CS_NUM_MASK;
	ctrlReg |= (csId << MV_SPI_CS_NUM_OFFSET);
	MV_SPI_REG_WRITE(MV_SPI_IF_CTRL_REG(spiId), ctrlReg);

	lastCsId = csId;

	return MV_OK;
}


/*******************************************************************************
* mvSpiIfConfigSet -
*
* DESCRIPTION:
*	Set the SPI interface parameters.
*
* INPUT:
*       spiId: The SPI controller ID to setup.
*	ifParams: The interface parameters.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*******************************************************************************/
MV_STATUS mvSpiIfConfigSet(MV_U8 spiId, MV_SPI_IF_PARAMS *ifParams)
{
	MV_U32	ctrlReg;

	ctrlReg = MV_SPI_REG_READ(MV_SPI_IF_CONFIG_REG(spiId));

	/* Set Clock Polarity */
	ctrlReg &= ~(MV_SPI_CPOL_MASK | MV_SPI_CPHA_MASK |
			MV_SPI_TXLSBF_MASK | MV_SPI_RXLSBF_MASK);
	if (ifParams->clockPolLow)
		ctrlReg |= MV_SPI_CPOL_MASK;

	if (ifParams->clockPhase == SPI_CLK_BEGIN_CYC)
		ctrlReg |= MV_SPI_CPHA_MASK;

	if (ifParams->txMsbFirst)
		ctrlReg |= MV_SPI_TXLSBF_MASK;

	if (ifParams->rxMsbFirst)
		ctrlReg |= MV_SPI_RXLSBF_MASK;

	MV_SPI_REG_WRITE(MV_SPI_IF_CONFIG_REG(spiId), ctrlReg);

	return MV_OK;
}


/*******************************************************************************
* mvSpiTimingParamsSet -
*
* DESCRIPTION:
*	Set the SPI timing params.
*
* INPUT:
*       spiId: The SPI controller ID to setup.
*	tmngParams: The interface timing parameters to configure.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*******************************************************************************/
MV_STATUS mvSpiTimingParamsSet(MV_U8 spiId, MV_SPI_TIMING_PARAMS *tmngParams)
{
	MV_U32	ctrlReg;

	ctrlReg = MV_SPI_REG_READ(MV_SPI_TMNG_PARAMS_REG(spiId));

	/* Set Clock Polarity */
	ctrlReg &= ~(MV_SPI_TCSH_MASK | MV_SPI_TMISO_SAMPLE_MASK | MV_SPI_TCS_SETUP_MASK
			| MV_SPI_TCS_HOLD_MASK);
	ctrlReg |= ((tmngParams->tcsh << MV_SPI_TCSH_OFFSET) |
			(tmngParams->tmisoSample << MV_SPI_TMISO_SAMPLE_OFFSET) |
			(tmngParams->tcsSetup << MV_SPI_TCS_SETUP_OFFSET) |
			(tmngParams->tcsHold << MV_SPI_TCS_HOLD_OFFSET));

	MV_SPI_REG_WRITE(MV_SPI_TMNG_PARAMS_REG(spiId), ctrlReg);

	return MV_OK;
}

#endif /* (MV_SPI_VERSION > 1) */

/*******************************************************************************
* mvSpiInit - Initialize the SPI controller
*
* DESCRIPTION:
*       Perform the neccessary initialization in order to be able to send an
*		receive over the SPI interface.
*
* INPUT:
*       serialBaudRate: Baud rate (SPI clock frequency)
*		use16BitMode: Whether to use 2bytes (MV_TRUE) or 1bytes (MV_FALSE)
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS mvSpiInit(MV_U8 spiId, MV_U32 serialBaudRate, MV_SPI_HAL_DATA *halData)
{
	MV_STATUS ret;

	mvOsMemcpy(&spiHalData, halData, sizeof(MV_SPI_HAL_DATA));

	/* Set the serial clock */
	ret = mvSpiBaudRateSet(spiId, serialBaudRate);
	if (ret != MV_OK)
		return ret;

	/* Configure the default SPI mode to be 16bit */
	MV_SPI_REG_BIT_SET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

	/* Fix ac timing on SPI in 6183, 6183L and 78x00 only */
    if ((spiHalData.ctrlModel == MV_6183_DEV_ID) ||
		(spiHalData.ctrlModel == MV_6183L_DEV_ID) ||
		(spiHalData.ctrlModel == MV_78100_DEV_ID) ||
		(spiHalData.ctrlModel == MV_78200_DEV_ID) ||
		(spiHalData.ctrlModel == MV_76100_DEV_ID) ||
		(spiHalData.ctrlModel == MV_6323_DEV_ID) ||
		(spiHalData.ctrlModel == MV_6322_DEV_ID) ||
		(spiHalData.ctrlModel == MV_6321_DEV_ID))
			MV_SPI_REG_BIT_SET(MV_SPI_IF_CONFIG_REG(spiId), BIT14);

    /* Verify that the CS is deasserted */
    mvSpiCsDeassert(spiId);

    mvSpiParamsSet(spiId, 0, SPI_TYPE_FLASH);

    return MV_OK;
}

/*******************************************************************************
* mvSpiBaudRateSet - Set the Frequency of the SPI clock
*
* DESCRIPTION:
*       Set the Prescale bits to adapt to the requested baud rate (the clock
*       used for thr SPI).
*
* INPUT:
*       serialBaudRate: Baud rate (SPI clock frequency)
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
#if (MV_SPI_VERSION == 1)
MV_STATUS mvSpiBaudRateSet(MV_U8 spiId, MV_U32 serialBaudRate)
{
	MV_U8 i;
	MV_U8 preScale[14] = { 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30};
	MV_U8 bestPrescaleIndx = 100;
	MV_U32 minBaudOffset = 0xFFFFFFFF;
	MV_U32 cpuClk = spiHalData.tclk; /*mvCpuPclkGet();*/
	MV_U32 tempReg;

	/* Find the best prescale configuration - less or equal */
	for (i = 0; i < 14; i++) {
		/* check for higher - irrelevent */
		if ((cpuClk / preScale[i]) > serialBaudRate)
			continue;

		/* check for exact fit */
		if ((cpuClk / preScale[i]) == serialBaudRate) {
			bestPrescaleIndx = i;
			break;
		}

		/* check if this is better than the previous one */
		if ((serialBaudRate - (cpuClk / preScale[i])) < minBaudOffset) {
			minBaudOffset = (serialBaudRate - (cpuClk / preScale[i]));
			bestPrescaleIndx = i;
		}
	}

	if (bestPrescaleIndx > 14) {
		mvOsPrintf("%s ERROR: SPI baud rate prescale error!\n", __func__);
		return MV_OUT_OF_RANGE;
	}

	/* configure the Prescale */
	tempReg = MV_SPI_REG_READ(MV_SPI_IF_CONFIG_REG(spiId));
	tempReg = ((tempReg & ~MV_SPI_CLK_PRESCALE_MASK) | (bestPrescaleIndx + 0x12));

	if (bestPrescaleIndx == 0) /* if we're using the highest clock, enable fast read. */
		tempReg |= MV_SPI_DIRECT_READ_MASK;

	MV_SPI_REG_WRITE(MV_SPI_IF_CONFIG_REG(spiId), tempReg);

	return MV_OK;
}

#elif (MV_SPI_VERSION == 2)

MV_STATUS mvSpiBaudRateSet(MV_U8 spiId, MV_U32 serialBaudRate)
{
	MV_U32 spr, sppr;
	MV_U32 divider;
	MV_U32 bestSpr = 0, bestSppr = 0;
	MV_U8 exactMatch = 0;
	MV_U32 minBaudOffset = 0xFFFFFFFF;
	MV_U32 cpuClk = spiHalData.tclk; /*mvCpuPclkGet();*/
	MV_U32 tempReg;

	/* Find the best prescale configuration - less or equal */
	for (spr = 1; spr <= 15; spr++) {
		for (sppr = 0; sppr <= 7; sppr++) {
			divider = spr * (1 << sppr);
			/* check for higher - irrelevent */
			if ((cpuClk / divider) > serialBaudRate)
				continue;

			/* check for exact fit */
			if ((cpuClk / divider) == serialBaudRate) {
				bestSpr = spr;
				bestSppr = sppr;
				exactMatch = 1;
				break;
			}

			/* check if this is better than the previous one */
			if ((serialBaudRate - (cpuClk / divider)) < minBaudOffset) {
				minBaudOffset = (serialBaudRate - (cpuClk / divider));
				bestSpr = spr;
				bestSppr = sppr;
			}
		}

		if (exactMatch == 1)
			break;
	}

	if (bestSpr == 0) {
		mvOsPrintf("%s ERROR: SPI baud rate prescale error!\n", __func__);
		return MV_OUT_OF_RANGE;
	}

	/* configure the Prescale */
	tempReg = MV_SPI_REG_READ(MV_SPI_IF_CONFIG_REG(spiId)) & ~(MV_SPI_SPR_MASK | MV_SPI_SPPR_0_MASK |
			MV_SPI_SPPR_HI_MASK);
	tempReg |= ((bestSpr << MV_SPI_SPR_OFFSET) |
			((bestSppr & 0x1) << MV_SPI_SPPR_0_OFFSET) |
			((bestSppr >> 1) << MV_SPI_SPPR_HI_OFFSET));
	MV_SPI_REG_WRITE(MV_SPI_IF_CONFIG_REG(spiId), tempReg);

	return MV_OK;
}

#else

#error "MV_SPI_VERSION is not defined."

#endif

/*******************************************************************************
* mvSpiCsAssert - Assert the Chip Select pin indicating a new transfer
*
* DESCRIPTION:
*       Assert The chip select - used to select an external SPI device
*
* INPUT:
*       None.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
********************************************************************************/
MV_VOID mvSpiCsAssert(MV_U8 spiId)
{
	/* For devices in which the SPI is muxed on the MPP with other interfaces*/
	mvSysSpiMppConfig(SYS_SPI_MPP_ENABLE);
	mvOsUDelay(1);
	MV_SPI_REG_BIT_SET(MV_SPI_IF_CTRL_REG(spiId), MV_SPI_CS_ENABLE_MASK);
}

/*******************************************************************************
* mvSpiCsDeassert - DeAssert the Chip Select pin indicating the end of a
*				  SPI transfer sequence
*
* DESCRIPTION:
*       DeAssert the chip select pin
*
* INPUT:
*       None.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
********************************************************************************/
MV_VOID mvSpiCsDeassert(MV_U8 spiId)
{
	MV_SPI_REG_BIT_RESET(MV_SPI_IF_CTRL_REG(spiId), MV_SPI_CS_ENABLE_MASK);

	/* For devices in which the SPI is muxed on the MPP with other interfaces*/
	mvSysSpiMppConfig(SYS_SPI_MPP_DEFAULT);
}

/*******************************************************************************
* mvSpiRead - Read a buffer over the SPI interface
*
* DESCRIPTION:
*       Receive (read) a buffer over the SPI interface in 16bit chunks. If the
*		buffer size is odd, then the last chunk will be 8bits. Chip select is not
*       handled at this level.
*
* INPUT:
*		pRxBuff: Pointer to the buffer to hold the received data
*		buffSize: length of the pRxBuff
*
* OUTPUT:
*		pRxBuff: Pointer to the buffer with the received data
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS mvSpiRead(MV_U8 spiId, MV_U8 *pRxBuff, MV_U32 buffSize)
{
    MV_STATUS ret;
	MV_U32 bytesLeft = buffSize;
	MV_U16 *rxPtr = (MV_U16 *)pRxBuff;

    /* check for null parameters */
    if (pRxBuff == NULL) {
	mvOsPrintf("%s ERROR: Null pointer parameter!\n", __func__);
	return MV_BAD_PARAM;
    }

    /* Check that the buffer pointer and the buffer size are 16bit aligned */
    if ((currSpiInfo->en16Bit) && (((MV_U32)buffSize & 1) == 0) && (((MV_U32)pRxBuff & 1) == 0)) {
	/* Verify that the SPI mode is in 16bit mode */
	MV_SPI_REG_BIT_SET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

	/* TX/RX as long we have complete 16bit chunks */
	while (bytesLeft >= MV_SPI_16_BIT_CHUNK_SIZE) {
		/* Transmitted and wait for the transfer to be completed */
		ret = mvSpi16bitDataTxRx(spiId, MV_SPI_DUMMY_WRITE_16BITS, rxPtr);
		if (ret != MV_OK)
			return ret;

		/* increment the pointers */
		rxPtr++;
		bytesLeft -= MV_SPI_16_BIT_CHUNK_SIZE;
	}

    } else {
	/* Verify that the SPI mode is in 8bit mode */
	MV_SPI_REG_BIT_RESET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

	/* TX/RX in 8bit chanks */
	while (bytesLeft > 0) {
		/* Transmitted and wait for the transfer to be completed */
		ret = mvSpi8bitDataTxRx(spiId, MV_SPI_DUMMY_WRITE_8BITS, pRxBuff);
		if (ret != MV_OK)
			return ret;
		/* increment the pointers */
		pRxBuff++;
		bytesLeft--;
	}
    }

	return MV_OK;
}

/*******************************************************************************
* mvSpiWrite - Transmit a buffer over the SPI interface
*
* DESCRIPTION:
*       Transmit a buffer over the SPI interface in 16bit chunks. If the
*		buffer size is odd, then the last chunk will be 8bits. No chip select
*       action is taken.
*
* INPUT:
*		pTxBuff: Pointer to the buffer holding the TX data
*		buffSize: length of the pTxBuff
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS mvSpiWrite(MV_U8 spiId, MV_U8 *pTxBuff, MV_U32 buffSize)
{
    MV_STATUS ret;
	MV_U32 bytesLeft = buffSize;
	MV_U16 *txPtr = (MV_U16 *)pTxBuff;

    /* check for null parameters */
    if (pTxBuff == NULL) {
	mvOsPrintf("%s ERROR: Null pointer parameter!\n", __func__);
	return MV_BAD_PARAM;
    }

    /* Check that the buffer pointer and the buffer size are 16bit aligned */
    if ((currSpiInfo->en16Bit)
	&& (currSpiInfo->en16Bit)
	&& (((MV_U32)buffSize & 1) == 0)
	&& (((MV_U32)pTxBuff & 1) == 0)) {
	/* Verify that the SPI mode is in 16bit mode */
	MV_SPI_REG_BIT_SET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

	/* TX/RX as long we have complete 16bit chunks */
	while (bytesLeft >= MV_SPI_16_BIT_CHUNK_SIZE) {
	/* Transmitted and wait for the transfer to be completed */
		ret = mvSpi16bitDataTxRx(spiId, *txPtr, NULL);
		if (ret != MV_OK)
			return ret;
		/* increment the pointers */
		txPtr++;
		bytesLeft -= MV_SPI_16_BIT_CHUNK_SIZE;
	}
    } else {
	/* Verify that the SPI mode is in 8bit mode */
	MV_SPI_REG_BIT_RESET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

	/* TX/RX in 8bit chanks */
	while (bytesLeft > 0) {
		/* Transmitted and wait for the transfer to be completed */
		ret = mvSpi8bitDataTxRx(spiId, *pTxBuff, NULL);
		if (ret != MV_OK)
			return ret;

		/* increment the pointers */
		pTxBuff++;
		bytesLeft--;
	}
    }
	return MV_OK;
}


/*******************************************************************************
* mvSpiReadWrite - Read and Write a buffer simultanuosely
*
* DESCRIPTION:
*       Transmit and receive a buffer over the SPI in 16bit chunks. If the
*		buffer size is odd, then the last chunk will be 8bits. The SPI chip
*       select is not handled implicitely.
*
* INPUT:
*       pRxBuff: Pointer to the buffer to write the RX info in
*		pTxBuff: Pointer to the buffer holding the TX info
*		buffSize: length of both the pTxBuff and pRxBuff
*
* OUTPUT:
*       pRxBuff: Pointer of the buffer holding the RX data
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS mvSpiReadWrite(MV_U8 spiId, MV_U8 *pRxBuff, MV_U8* pTxBuff, MV_U32 buffSize)
{
    MV_STATUS ret;
    MV_U32 bytesLeft = buffSize;
    MV_U16 *txPtr = (MV_U16 *)pTxBuff;
    MV_U16 *rxPtr = (MV_U16 *)pRxBuff;

	/* check for null parameters */
	if ((pRxBuff == NULL) || (pTxBuff == NULL)) {
		mvOsPrintf("%s ERROR: Null pointer parameter!\n", __func__);
		return MV_BAD_PARAM;
	}

	 /* Check that the buffer pointer and the buffer size are 16bit aligned */
	if ((currSpiInfo->en16Bit)
		&& (((MV_U32)buffSize & 1) == 0)
		&& (((MV_U32)pTxBuff & 1) == 0)
		&& (((MV_U32)pRxBuff & 1) == 0)) {
		/* Verify that the SPI mode is in 16bit mode */
		MV_SPI_REG_BIT_SET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

		/* TX/RX as long we have complete 16bit chunks */
		while (bytesLeft >= MV_SPI_16_BIT_CHUNK_SIZE) {
		/* Transmitted and wait for the transfer to be completed */
			ret = mvSpi16bitDataTxRx(spiId, *txPtr, rxPtr);
			if (ret != MV_OK)
				return ret;
			/* increment the pointers */
			txPtr++;
			rxPtr++;
			bytesLeft -= MV_SPI_16_BIT_CHUNK_SIZE;
		}
	} else {
		/* Verify that the SPI mode is in 8bit mode */
		MV_SPI_REG_BIT_RESET(MV_SPI_IF_CONFIG_REG(spiId), MV_SPI_BYTE_LENGTH_MASK);

		/* TX/RX in 8bit chanks */
		while (bytesLeft > 0) {
			/* Transmitted and wait for the transfer to be completed */
			ret = mvSpi8bitDataTxRx(spiId, *pTxBuff, pRxBuff);
			if (ret != MV_OK)
				return ret;
			pRxBuff++;
			pTxBuff++;
			bytesLeft--;
		}
	}

	return MV_OK;
}

/*******************************************************************************
* mvSpiIfByteLenSet - Number of bytes in each serial flash I/O transfer.
*
* DESCRIPTION:
*
* INPUT:
*       spiId: The SPI controller ID to setup.
*	byteLen : 0 = 1Byte, 1 = 2Byte
*
* OUTPUT:
*       None.
*
* RETURN:
*
*******************************************************************************/
MV_VOID mvSpiIfByteLenSet(MV_U8 spiId, MV_U32 byteLen)
{
	MV_U32	ctrlReg;

	ctrlReg = MV_SPI_REG_READ(MV_SPI_IF_CONFIG_REG(spiId));
	ctrlReg &= ~(MV_SPI_BYTE_LENGTH_MASK);
	if (byteLen == SPI_CONFIG_2_BYTE_LEN)
		ctrlReg |= MV_SPI_BYTE_LENGTH_MASK;

	MV_SPI_REG_WRITE(MV_SPI_IF_CONFIG_REG(spiId), ctrlReg);
}