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

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "spi/mvSpi.h"
#include "spi/mvSpiCmnd.h"
#include "sflash/mvSysSFlash.h"

#define MV_SYS_SFLASH_MAX_CMD_LEN 4

static struct {
	MV_U8 buf[MV_SYS_SFLASH_MAX_CMD_LEN];
	MV_U32 bufLen;
	MV_U8  transType;
} mvSysSflashCmd;

/*******************************************************************************
* mvSysSflashCommandSet
*
* DESCRIPTION:
*	System interface for sending a command to the SPI flash.
*
* INPUT:
*       flashHandle: Handle passed by OS glue by which an SPI flash is
*		     identified.
*      	cmdBuff:     Command data to be written.
*	cmdLen:	     Command length in bytes.
*	transType:   Bitmask describing the transaction type, see 
*		     SYS_SFLASH_TRANS_XX for details.
*
* OUTPUT:
*	None.
*
* RETURN:
*	MV_OK on success,
*	MV_ERROR otherwise.
*
*******************************************************************************/
MV_STATUS mvSysSflashCommandSet(MV_VOID *flashHandle, MV_U8* cmdBuff, MV_U32 cmdLen,
		MV_U8 transType)
{
	if (cmdLen > MV_SYS_SFLASH_MAX_CMD_LEN)
		return MV_ERROR;

	if (!(transType & SYS_SFLASH_TRANS_START) || (mvSysSflashCmd.transType != 0))
		return MV_ERROR;	

	memcpy(mvSysSflashCmd.buf,cmdBuff,cmdLen);	
	mvSysSflashCmd.bufLen = cmdLen;
	mvSysSflashCmd.transType = transType;

	if (transType & SYS_SFLASH_TRANS_END)
		return mvSysSflashDataWrite(flashHandle, NULL, 0, transType);

	return MV_OK;
}


/*******************************************************************************
* mvSysSflashDataRead
*
* DESCRIPTION:
*	System interface for reading SPI flash data.
*
* INPUT:
*       flashHandle: Handle passed by OS glue by which an SPI flash is
*		     identified.
*	dataBuff:    Buffer to read the data into.
*	dataLen:     Number of bytes to read.
*	dummyBytes:  Number of dummy bytes to read before reading the real
*		     data.
*	transType:   Bitmask describing the transaction type, see 
*		     SYS_SFLASH_TRANS_XX for details.
*
* OUTPUT:
*	dataBuff: The data as read from flash.
*
* RETURN:
*	MV_OK on success,
*	MV_ERROR otherwise.
*
*******************************************************************************/
MV_STATUS mvSysSflashDataRead(MV_VOID *flashHandle, MV_U8* dataBuff, MV_U32 dataLen,
		MV_U32 dummyBytes, MV_U8 transType)
{
	MV_STATUS  ret;	

	if (!(mvSysSflashCmd.transType & SYS_SFLASH_TRANS_START))
		return MV_ERROR;

	ret = mvSpiWriteThenRead (0, mvSysSflashCmd.buf, mvSysSflashCmd.bufLen,
			dataBuff, dataLen, dummyBytes);
	if (transType & SYS_SFLASH_TRANS_END)
		memset(&mvSysSflashCmd,0,sizeof(mvSysSflashCmd));
	return ret;
}


/*******************************************************************************
* mvSysSflashDataWrite
*
* DESCRIPTION:
*	System interface for writing SPI flash data.
*
* INPUT:
*       flashHandle: Handle passed by OS glue by which an SPI flash is
*		     identified.
*	dataBuff:    Buffer holding the data to be written.
*	dataLen:     Number of bytes to write.
*	transType:   Bitmask describing the transaction type, see 
*		     SYS_SFLASH_TRANS_XX for details.
*
* OUTPUT:
*	None.
*
* RETURN:
*	MV_OK on success,
*	MV_ERROR otherwise.
*
*******************************************************************************/
MV_STATUS mvSysSflashDataWrite(MV_VOID *flashHandle, MV_U8* dataBuff, MV_U32 dataLen,
		MV_U8 transType)
{
	MV_STATUS ret;

	if (!(mvSysSflashCmd.transType & SYS_SFLASH_TRANS_START))
		return MV_ERROR;

	ret = mvSpiWriteThenWrite (0, mvSysSflashCmd.buf, mvSysSflashCmd.bufLen, dataBuff, dataLen);
	if (transType & SYS_SFLASH_TRANS_END)
		memset(&mvSysSflashCmd,0,sizeof(mvSysSflashCmd));
	return ret;
}


/*******************************************************************************
* mvSysSflashFreqSet
*
* DESCRIPTION:
*	System interface for controlling the SPI interface frequency.
*
* INPUT:
*       flashHandle: Handle passed by OS glue by which an SPI flash is
*		     identified.
*	freq:	     The new frequency to be configured for the SPI IF.
*
* OUTPUT:
*	None.
*
* RETURN:
*	MV_OK on success,
*	MV_ERROR otherwise.
*
*******************************************************************************/
MV_STATUS mvSysSflashFreqSet(MV_VOID *flashHandle, MV_U32 freq)
{
    return mvSpiBaudRateSet(0, freq);
}