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/*******************************************************************************
Copyright (C) Marvell International Ltd. and its affiliates
This software file (the "File") is owned and distributed by Marvell
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********************************************************************************
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/
#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
static MV_SPI_HAL_DATA spiHalData;
static MV_SPI_TYPE_INFO spiTypes[] = {
{
.en16Bit = MV_TRUE,
.byteCsAsrt = MV_FALSE,
.baudRate = (20 << 20), /* 20M */
},
{
.en16Bit = MV_FALSE,
.byteCsAsrt = MV_TRUE,
.baudRate = _8M,
}
};
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)
{
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(0, currSpiInfo->baudRate);
}
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_REG_WRITE(MV_SPI_INT_CAUSE_REG(spiId), 0x0);
/* Transmit data */
MV_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_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_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_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_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_REG_WRITE(MV_SPI_INT_CAUSE_REG(spiId), 0x0);
/* Transmit data */
MV_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_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_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_REG_READ(MV_SPI_IF_CTRL_REG(spiId));
ctrlReg &= ~MV_SPI_CS_NUM_MASK;
ctrlReg |= (csId << MV_SPI_CS_NUM_OFFSET);
MV_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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_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;
}