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

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


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

extern MV_SPI_TYPE_INFO *currSpiInfo;


/*******************************************************************************
* mvSpiReadAndWrite - Read and Write a buffer simultanuousely
*
* 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.
*
* 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 mvSpiReadAndWrite(MV_U8 spiId, MV_U8 *pRxBuff, MV_U8 *pTxBuff, MV_U32 buffSize)
{
    MV_STATUS ret;

    /* check for null parameters */
    if ((pRxBuff == NULL) || (pTxBuff == NULL) || (buffSize == 0)) {
	mvOsPrintf("%s ERROR: Null pointer parameter!\n", __func__);
	return MV_BAD_PARAM;
    }

    /* First assert the chip select */
    mvSpiCsAssert(spiId);

    ret = mvSpiReadWrite(spiId, pRxBuff, pTxBuff, buffSize);

    /* Finally deassert the chip select */
    mvSpiCsDeassert(spiId);

	return ret;
}

/*******************************************************************************
* mvSpiWriteThenWrite - Serialize a command followed by the data over the TX line
*
* DESCRIPTION:
*       Assert the chip select line. Transmit the command buffer followed by
*       the data buffer. Then deassert the CS line.
*
* INPUT:
*       pCmndBuff: Pointer to the command buffer to transmit
*       cmndSize: length of the command size
*		pTxDataBuff: Pointer to the data buffer to transmit
*		txDataSize: length of the data buffer
*
* OUTPUT:
*       None.
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS	mvSpiWriteThenWrite(MV_U8 spiId, MV_U8 *pCmndBuff, MV_U32 cmndSize, MV_U8 *pTxDataBuff,
				MV_U32 txDataSize)
{
    MV_STATUS ret = MV_OK, tempRet;

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

    if (pCmndBuff == NULL) {
	mvOsPrintf("%s ERROR: Null pointer parameter!\n", __func__);
	return MV_BAD_PARAM;
    }

    /* First assert the chip select */
    if (!currSpiInfo->byteCsAsrt)
	mvSpiCsAssert(spiId);

    /* first write the command */
    if ((cmndSize) && (pCmndBuff != NULL)) {
	tempRet = mvSpiWrite(spiId, pCmndBuff, cmndSize);
	if (tempRet != MV_OK)
		ret = tempRet;
    }

    /* Then write the data buffer */
#ifndef CONFIG_MARVELL
    if (txDataSize) {
#else
    if ((txDataSize) && (pTxDataBuff != NULL)) {
#endif
	tempRet = mvSpiWrite(spiId, pTxDataBuff, txDataSize);
	if (tempRet != MV_OK)
		ret = tempRet;
    }

    /* Finally deassert the chip select */
    if (!currSpiInfo->byteCsAsrt)
	mvSpiCsDeassert(spiId);

    return ret;
}

/*******************************************************************************
* mvSpiWriteThenRead - Serialize a command then read a data buffer
*
* DESCRIPTION:
*       Assert the chip select line. Transmit the command buffer then read
*       the data buffer. Then deassert the CS line.
*
* INPUT:
*       pCmndBuff: Pointer to the command buffer to transmit
*       cmndSize: length of the command size
*		pRxDataBuff: Pointer to the buffer to read the data in
*		txDataSize: length of the data buffer
*
* OUTPUT:
*		pRxDataBuff: Pointer to the buffer holding the data
*
* RETURN:
*       Success or Error code.
*
*
*******************************************************************************/
MV_STATUS mvSpiWriteThenRead(MV_U8 spiId, MV_U8 *pCmndBuff, MV_U32 cmndSize, MV_U8 *pRxDataBuff,
				MV_U32 rxDataSize, MV_U32 dummyBytesToRead)
{
    MV_STATUS ret = MV_OK, tempRet;
    MV_U8   dummyByte;

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

    /* First assert the chip select */
    if (!currSpiInfo->byteCsAsrt)
	mvSpiCsAssert(spiId);

    /* first write the command */
    if ((cmndSize) && (pCmndBuff != NULL)) {
	tempRet = mvSpiWrite(spiId, pCmndBuff, cmndSize);
	if (tempRet != MV_OK)
		ret = tempRet;
    }

    /* Read dummy bytes before real data.   */
    while (dummyBytesToRead) {
	mvSpiRead(spiId, &dummyByte, 1);
	dummyBytesToRead--;
    }

    /* Then write the data buffer */
    if ((rxDataSize) && (pRxDataBuff != NULL)) {
	tempRet = mvSpiRead(spiId, pRxDataBuff, rxDataSize);
	if (tempRet != MV_OK)
	ret = tempRet;
    }

    /* Finally deassert the chip select */
    if (!currSpiInfo->byteCsAsrt)
	mvSpiCsDeassert(spiId);

    return ret;
}