/*******************************************************************************
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********************************************************************************
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WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
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Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    *   Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.

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	notice, this list of conditions and the following disclaimer in the
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

#include "mvXor.h"
#include "mvXorRegs.h"
#include "printf.h"

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

static GT_U32 uiXorRegsCtrlBackup;
static GT_U32 uiXorRegsBaseBackup[MAX_CS];
static GT_U32 uiXorRegsMaskBackup[MAX_CS];

extern GT_U32 mvHwsDdr3TipMaxCSGet(GT_U32 devNum);

GT_VOID mvSysXorInit(GT_U32 uiNumOfCS, GT_U32 uiCsEna, GT_U32 csSize, GT_U32 baseDelta)
{
	GT_U32 uiReg,ui,uiBase,uiCsCount;

	uiXorRegsCtrlBackup = MV_REG_READ(XOR_WINDOW_CTRL_REG(0, 0));
	for(ui=0;ui<MAX_CS;ui++)
		uiXorRegsBaseBackup[ui] = MV_REG_READ(XOR_BASE_ADDR_REG(0, ui));
	for(ui=0;ui<MAX_CS;ui++)
		uiXorRegsMaskBackup[ui] = MV_REG_READ(XOR_SIZE_MASK_REG(0, ui));

	uiReg = 0;
	for(ui=0;ui<(uiNumOfCS);ui++) {
		uiReg |= (0x1 << (ui)); 					/* 	Enable Window x for each CS */
		uiReg |= (0x3 << ((ui*2)+16)); 				/* 	Enable Window x for each CS */
	}

	MV_REG_WRITE(XOR_WINDOW_CTRL_REG(0, 0), uiReg);

	uiCsCount = 0;
	for(ui=0;ui<uiNumOfCS;ui++) {
		if(uiCsEna & (1<<ui)) {
			/* window x - Base - 0x00000000, Attribute 0x0E - DRAM */
			uiBase = csSize*ui + baseDelta;
			switch(ui) {
				case 0:
					uiBase |= 0xE00;
					break;
				case 1:
					uiBase |= 0xD00;
					break;
				case 2:
					uiBase |= 0xB00;
					break;
				case 3:
					uiBase |= 0x700;
					break;
			}

			MV_REG_WRITE(XOR_BASE_ADDR_REG(0, uiCsCount), uiBase);

			/* window x - Size*/
			MV_REG_WRITE(XOR_SIZE_MASK_REG(0, uiCsCount), 0x7FFF0000);
			uiCsCount++;
		}
	}

	mvXorHalInit(1);
	return;
}

GT_VOID mvSysXorFinish(void)
{
	GT_U32 ui;

	MV_REG_WRITE(XOR_WINDOW_CTRL_REG(0, 0), uiXorRegsCtrlBackup);
	for(ui=0;ui<MAX_CS;ui++)
		MV_REG_WRITE(XOR_BASE_ADDR_REG(0, ui), uiXorRegsBaseBackup[ui]);
	for(ui=0;ui<MAX_CS;ui++)
		MV_REG_WRITE(XOR_SIZE_MASK_REG(0, ui), uiXorRegsMaskBackup[ui]);

	MV_REG_WRITE(XOR_ADDR_OVRD_REG(0, 0), 0);
}


/*******************************************************************************
* mvXorHalInit - Initialize XOR engine
*
* DESCRIPTION:
*               This function initialize XOR unit.
* INPUT:
*       None.
*
* OUTPUT:
*       None.
*
* RETURN:
*       GT_BAD_PARAM if parameters to function invalid, GT_OK otherwise.
*******************************************************************************/
GT_VOID mvXorHalInit(GT_U32 xorChanNum)
{
	GT_U32 i;
	/* Abort any XOR activity & set default configuration */
	for (i = 0; i < xorChanNum; i++) {
		mvXorCommandSet(i, MV_STOP);
		mvXorCtrlSet(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
			     (4 << XEXCR_DST_BURST_LIMIT_OFFS) | (4 << XEXCR_SRC_BURST_LIMIT_OFFS)
#if defined(MV_CPU_BE)
/*				| (1 << XEXCR_DRD_RES_SWP_OFFS)
				| (1 << XEXCR_DWR_REQ_SWP_OFFS)
*/
			     | (1 << XEXCR_DES_SWP_OFFS)
#endif
		    );
	}

}

/*******************************************************************************
* mvXorCtrlSet - Set XOR channel control registers
*
* DESCRIPTION:
*
* INPUT:
*
* OUTPUT:
*       None.
*
* RETURN:
*       GT_BAD_PARAM if parameters to function invalid, GT_OK otherwise.
* NOTE:
*    This function does not modify the OperationMode field of control register.
*
*******************************************************************************/
GT_STATUS mvXorCtrlSet(GT_U32 chan, GT_U32 xorCtrl)
{
	GT_U32 oldValue;

	/* update the XOR Engine [0..1] Configuration Registers (XExCR) */
	oldValue = MV_REG_READ(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)))
	    & XEXCR_OPERATION_MODE_MASK;
	xorCtrl &= ~XEXCR_OPERATION_MODE_MASK;
	xorCtrl |= oldValue;
	MV_REG_WRITE(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xorCtrl);
	return GT_OK;
}

/*******************************************************************************
* mvXorMemInit -
*
* DESCRIPTION:
*
*
* INPUT:
*       None.
*
* OUTPUT:
*       None.
*
* RETURN:
*
*
*******************************************************************************/
GT_STATUS mvXorMemInit(GT_U32 chan, GT_U32 startPtr, GT_U32 blockSize, GT_U32 initValHigh, GT_U32 initValLow)
{
	GT_U32 temp;

	/* Parameter checking   */
	if (chan >= MV_XOR_MAX_CHAN) {
		return GT_BAD_PARAM;
	}
	if (MV_ACTIVE == mvXorStateGet(chan)) {
		return GT_BUSY;
	}
	if ((blockSize < XEXBSR_BLOCK_SIZE_MIN_VALUE) || (blockSize > XEXBSR_BLOCK_SIZE_MAX_VALUE)) {
		return GT_BAD_PARAM;
	}

	/* set the operation mode to Memory Init */
	temp = MV_REG_READ(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
	temp &= ~XEXCR_OPERATION_MODE_MASK;
	temp |= XEXCR_OPERATION_MODE_MEM_INIT;
	MV_REG_WRITE(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), temp);

	/* update the startPtr field in XOR Engine [0..1] Destination Pointer
	   Register (XExDPR0) */
	MV_REG_WRITE(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), startPtr);

	/* update the BlockSize field in the XOR Engine[0..1] Block Size
	   Registers (XExBSR) */
	MV_REG_WRITE(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)), blockSize);

	/* update the field InitValL in the XOR Engine Initial Value Register
	   Low (XEIVRL) */
	MV_REG_WRITE(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), initValLow);

	/* update the field InitValH in the XOR Engine Initial Value Register
	   High (XEIVRH) */
	MV_REG_WRITE(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), initValHigh);

	/* start transfer */
	MV_REG_BIT_SET(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)), XEXACTR_XESTART_MASK);

	return GT_OK;
}

/*******************************************************************************
* mvXorStateGet - Get XOR channel state.
*
* DESCRIPTION:
*       XOR channel activity state can be active, idle, paused.
*       This function retrunes the channel activity state.
*
* INPUT:
*       chan     - the channel number
*
* OUTPUT:
*       None.
*
* RETURN:
*       XOR_CHANNEL_IDLE    - If the engine is idle.
*       XOR_CHANNEL_ACTIVE  - If the engine is busy.
*       XOR_CHANNEL_PAUSED  - If the engine is paused.
*       MV_UNDEFINED_STATE  - If the engine state is undefind or there is no
*                             such engine
*
*******************************************************************************/
MV_STATE mvXorStateGet(GT_U32 chan)
{
	GT_U32 state;

	/* Parameter checking   */
	if (chan >= MV_XOR_MAX_CHAN) {
		DB(mvPrintf("%s: ERR. Invalid chan num %d\n", __func__, chan));
		return MV_UNDEFINED_STATE;
	}

	/* read the current state */
	state = MV_REG_READ(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
	state &= XEXACTR_XESTATUS_MASK;

	/* return the state */
	switch (state) {
	case XEXACTR_XESTATUS_IDLE:
		return MV_IDLE;
	case XEXACTR_XESTATUS_ACTIVE:
		return MV_ACTIVE;
	case XEXACTR_XESTATUS_PAUSED:
		return MV_PAUSED;
	}
	return MV_UNDEFINED_STATE;
}

/*******************************************************************************
* mvXorCommandSet - Set command of XOR channel
*
* DESCRIPTION:
*       XOR channel can be started, idle, paused and restarted.
*       Paused can be set only if channel is active.
*       Start can be set only if channel is idle or paused.
*       Restart can be set only if channel is paused.
*       Stop can be set only if channel is active.
*
* INPUT:
*       chan     - The channel number
*       command  - The command type (start, stop, restart, pause)
*
* OUTPUT:
*       None.
*
* RETURN:
*       GT_OK on success , GT_BAD_PARAM on erroneous parameter, MV_ERROR on
*       undefind XOR engine mode
*
*******************************************************************************/
GT_STATUS mvXorCommandSet(GT_U32 chan, MV_COMMAND command)
{
	MV_STATE state;

	/* Parameter checking */
	if (chan >= MV_XOR_MAX_CHAN) {
		DB(mvPrintf("%s: ERR. Invalid chan num %d\n", __func__, chan));
		return GT_BAD_PARAM;
	}

	/* get the current state */
	state = mvXorStateGet(chan);

	/* command is start and current state is idle */
	if ((command == MV_START) && (state == MV_IDLE)) {
		MV_REG_BIT_SET(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)), XEXACTR_XESTART_MASK);
		return GT_OK;
	}
	/* command is stop and current state is active */
	else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
		MV_REG_BIT_SET(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)), XEXACTR_XESTOP_MASK);
		return GT_OK;
	}
	/* command is paused and current state is active */
	else if (((MV_STATE)command == MV_PAUSED) && (state == MV_ACTIVE)) {
		MV_REG_BIT_SET(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)), XEXACTR_XEPAUSE_MASK);
		return GT_OK;
	}
	/* command is restart and current state is paused */
	else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
		MV_REG_BIT_SET(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)), XEXACTR_XERESTART_MASK);
		return GT_OK;
	}

	/* command is stop and current state is active */
	else if ((command == MV_STOP) && (state == MV_IDLE))
		return GT_OK;

	/* illegal command */
	DB(mvPrintf("%s: ERR. Illegal command\n", __func__));

	return GT_BAD_PARAM;
}


/*******************************************************************************
* ddr3NewTipEccScrub - Scrub the DRAM
*
* DESCRIPTION:
*
* INPUT:
*
* OUTPUT:
*       None.
*
* RETURN:
*
*******************************************************************************/
MV_VOID	ddr3NewTipEccScrub()
{
	MV_U32 cs_c,max_cs;
	MV_U32 uiCsEna = 0;
    mvPrintf("DDR Training Sequence - Start scrubbing \n");

	max_cs = mvHwsDdr3TipMaxCSGet(0);
	for (cs_c = 0; cs_c < max_cs; cs_c++)
		uiCsEna |= 1 << cs_c;

	mvSysXorInit(max_cs, uiCsEna, 0x80000000, 0);

	mvXorMemInit(0, 0x00000000, 0x80000000, 0xdeadbeef, 0xdeadbeef);
    /* wait for previous transfer completion */
    while (mvXorStateGet(0) != MV_IDLE);

	mvXorMemInit(0, 0x80000000, 0x40000000, 0xdeadbeef, 0xdeadbeef);
    /* wait for previous transfer completion */
    while (mvXorStateGet(0) != MV_IDLE);

    /* Return XOR State */
    mvSysXorFinish();

    mvPrintf("DDR Training Sequence - End scrubbing \n");
}