/*******************************************************************************
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********************************************************************************
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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. 

    *   Redistributions in binary form must reproduce the above copyright
        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 
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "mvTsuRegs.h"
#include "mvTsu.h"

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


static MV_STATUS tsuWinOverlapDetect(MV_U32 winNum, MV_ADDR_WIN *pAddrWin);

MV_TARGET tsuAddrDecPrioTap[] = 
{
#if defined(MV_INCLUDE_SDRAM_CS0)
    SDRAM_CS0,
#endif
#if defined(MV_INCLUDE_SDRAM_CS1)
    SDRAM_CS1,
#endif
#if defined(MV_INCLUDE_SDRAM_CS2)
    SDRAM_CS2,
#endif
#if defined(MV_INCLUDE_SDRAM_CS3)
    SDRAM_CS3,
#endif
    TBL_TERM
};

/*******************************************************************************
* mvTsuWinInit
*
* DESCRIPTION:
* 	Initialize the TSU unit address decode windows.
*
* INPUT:
*	addWinMap: An array holding the address decoding information for the
*		    system.
* OUTPUT:
*	None.
* RETURN:
*       MV_OK	- on success,
*
*******************************************************************************/
MV_STATUS mvTsuWinInit(MV_UNIT_WIN_INFO *addrWinMap)
{
	MV_U32		winNum;
	MV_UNIT_WIN_INFO	*addrDecWin;
	MV_U32		winPrioIndex=0;

	/* First disable all address decode windows */
	for(winNum = 0; winNum < TSU_MAX_DECODE_WIN; winNum++)
	{
		MV_REG_BIT_RESET(MV_TSU_WIN_CTRL_REG(winNum),
				 TSU_WIN_CTRL_EN_MASK);
	}

	/* Go through all windows in user table until table terminator      */
	for(winNum = 0; ((tsuAddrDecPrioTap[winPrioIndex] != TBL_TERM) &&
			 (winNum < TSU_MAX_DECODE_WIN));)
	{
		addrDecWin = &addrWinMap[tsuAddrDecPrioTap[winPrioIndex]];
		if (addrDecWin->enable == MV_TRUE) {
			if (MV_OK != mvTsuWinWrite(0, winNum, addrDecWin)) {
				DB(mvOsPrintf("mvTsuWinInit: ERR. mvTsuWinWrite failed\n"));
				return MV_ERROR;
			}
			winNum++;
		}
		winPrioIndex++;
	}

	return MV_OK;
}


/*******************************************************************************
* mvTsuWinWrite
*
* DESCRIPTION:
*       This function sets a peripheral target (e.g. SDRAM bank0, PCI_MEM0)
*       address window, also known as address decode window.
*       After setting this target window, the TSU will be able to access the
*       target within the address window.
*
* INPUT:
*	unit	    - The Unit ID.
*       winNum      - TSU to target address decode window number.
*       pAddrDecWin - TSU target window data structure.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_ERROR	- if address window overlapps with other address decode 
*			windows.
*       MV_BAD_PARAM	- if base address is invalid parameter or target is
*       		unknown.
*
*******************************************************************************/
MV_STATUS mvTsuWinWrite(MV_U32 unit, MV_U32 winNum, MV_UNIT_WIN_INFO *pAddrDecWin)
{
	MV_U32  sizeReg, baseReg;

	/* Parameter checking   */
	if(winNum >= TSU_MAX_DECODE_WIN)
	{
		mvOsPrintf("mvTsuWinSet: ERR. Invalid win num %d\n",winNum);
		return MV_BAD_PARAM;
	}

	/* Check if the requested window overlapps with current windows     */
	if(MV_TRUE == tsuWinOverlapDetect(winNum, &pAddrDecWin->addrWin))
	{
		mvOsPrintf("mvTsuWinSet: ERR. Window %d overlap\n", winNum);
		return MV_ERROR;
	}

	/* check if address is aligned to the size */
	if(MV_IS_NOT_ALIGN(pAddrDecWin->addrWin.baseLow,pAddrDecWin->addrWin.size))
	{
		mvOsPrintf("mvTsuWinSet: Error setting TSU window %d.\n"
			   "Address 0x%08x is unaligned to size 0x%x.\n",
			   winNum,
			   pAddrDecWin->addrWin.baseLow,
			   pAddrDecWin->addrWin.size);
		return MV_ERROR;
	}

	baseReg = pAddrDecWin->addrWin.baseLow & TSU_WIN_BASE_MASK;
	sizeReg = (pAddrDecWin->addrWin.size / TSU_WIN_SIZE_ALIGN) - 1;
	sizeReg = (sizeReg << TSU_WIN_CTRL_SIZE_OFFS) & TSU_WIN_CTRL_SIZE_MASK;

	/* set attributes */
	baseReg &= ~TSU_WIN_CTRL_ATTR_MASK;
	baseReg |= pAddrDecWin->attrib << TSU_WIN_CTRL_ATTR_OFFS;
	/* set target ID */
	baseReg &= ~TSU_WIN_CTRL_TARGET_MASK;
	baseReg |= pAddrDecWin->targetId << TSU_WIN_CTRL_TARGET_OFFS;

	/* for the safe side we disable the window before writing the new */
	/* values */
	mvTsuWinEnable(winNum, MV_FALSE);
	MV_REG_WRITE(MV_TSU_WIN_CTRL_REG(winNum), sizeReg);

	/* Write to address decode Size Register                            */
	MV_REG_WRITE(MV_TSU_WIN_BASE_REG(winNum), baseReg);

	/* Enable address decode target window                              */
	if(pAddrDecWin->enable == MV_TRUE)
	{
		mvTsuWinEnable(winNum,MV_TRUE);
	}

	return MV_OK;
}

/*******************************************************************************
* mvTsuWinRead
*
* DESCRIPTION:
*	Get TSU peripheral target address window.
*
* INPUT:
*	unit   - The Unit ID.
*	winNum - TSU to target address decode window number.
*
* OUTPUT:
*       pAddrDecWin - TSU target window data structure.
*
* RETURN:
*       MV_ERROR if register parameters are invalid.
*
*******************************************************************************/
MV_STATUS mvTsuWinRead(MV_U32 unit, MV_U32 winNum, MV_UNIT_WIN_INFO *pAddrDecWin)
{
	MV_U32 baseReg, sizeReg;

	/* Parameter checking   */
	if(winNum >= TSU_MAX_DECODE_WIN)
	{
		mvOsPrintf("mvTsuWinGet: ERR. Invalid winNum %d\n", winNum);
		return MV_NOT_SUPPORTED;
	}

	baseReg = MV_REG_READ(MV_TSU_WIN_BASE_REG(winNum));                                                                           
	sizeReg = MV_REG_READ(MV_TSU_WIN_CTRL_REG(winNum));

	pAddrDecWin->addrWin.size = (sizeReg & TSU_WIN_CTRL_SIZE_MASK) >> TSU_WIN_CTRL_SIZE_OFFS;
	pAddrDecWin->addrWin.size = (pAddrDecWin->addrWin.size + 1) * TSU_WIN_SIZE_ALIGN;

	pAddrDecWin->addrWin.baseLow = baseReg & TSU_WIN_BASE_MASK;
	pAddrDecWin->addrWin.baseHigh =  0;

	/* attrib and targetId */
	pAddrDecWin->attrib = 
		(sizeReg & TSU_WIN_CTRL_ATTR_MASK) >> TSU_WIN_CTRL_ATTR_OFFS;
	pAddrDecWin->targetId = 
		(sizeReg & TSU_WIN_CTRL_TARGET_MASK) >> TSU_WIN_CTRL_TARGET_OFFS;

	/* Check if window is enabled   */
	if((MV_REG_READ(MV_TSU_WIN_CTRL_REG(winNum)) & TSU_WIN_CTRL_EN_MASK))
		pAddrDecWin->enable = MV_TRUE;
	else
		pAddrDecWin->enable = MV_FALSE;

	return MV_OK;
}


/*******************************************************************************
* mvTsuWinEnable - Enable/disable a TS address decode window
*
* DESCRIPTION:
*       This function enable/disable a TS address decode window.
*
* INPUT:
*       winNum - Decode window number.
*       enable - Enable/disable parameter.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
*
*******************************************************************************/
MV_STATUS mvTsuWinEnable(MV_U32 winNum, MV_BOOL enable)
{
    MV_UNIT_WIN_INFO	addrDecWin;

    /* Parameter checking   */               
    if (winNum >= TSU_MAX_DECODE_WIN) {
        DB(mvOsPrintf("%s: ERR. Invalid winNum%d\n", __FUNCTION__, winNum));
        return MV_ERROR;
    }

    if (enable == MV_TRUE) {
	/* Get current window */
	if (MV_OK != mvTsuWinRead(0, winNum, &addrDecWin)) {
	    DB(mvOsPrintf("%s: ERR. targetWinGet fail\n", __FUNCTION__));
	    return MV_ERROR;
	}

	/* Check for overlapping */
	if (MV_TRUE == tsuWinOverlapDetect(winNum, &(addrDecWin.addrWin))) {
	    /* Overlap detected	*/
	    DB(mvOsPrintf("%s: ERR. Overlap detected\n", __FUNCTION__));
	    return MV_ERROR;
	}

	/* No Overlap. Enable address decode target window */
	MV_REG_BIT_SET(MV_TSU_WIN_CTRL_REG(winNum), TSU_WIN_CTRL_EN_MASK);
    } else {
	/* Disable address decode target window */
	MV_REG_BIT_RESET(MV_TSU_WIN_CTRL_REG(winNum), TSU_WIN_CTRL_EN_MASK);
    }

    return MV_OK;                  
}

/*******************************************************************************
* tsuWinOverlapDetect - Detect TS address windows overlaping
*
* DESCRIPTION:
*       An unpredicted behaviour is expected in case TS address decode 
*       windows overlaps.
*       This function detects TS address decode windows overlaping of a 
*       specified window. The function does not check the window itself for 
*       overlaping. The function also skipps disabled address decode windows.
*
* INPUT:
*       winNum      - address decode window number.
*       pAddrDecWin - An address decode window struct.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_TRUE if the given address window overlap current address
*       decode map, MV_FALSE otherwise, MV_ERROR if reading invalid data 
*       from registers.
*
*******************************************************************************/
static MV_STATUS tsuWinOverlapDetect(MV_U32 winNum, MV_ADDR_WIN *pAddrWin)
{
    MV_U32		baseAddrEnableReg;
    MV_U32		winNumIndex;
    MV_UNIT_WIN_INFO	addrDecWin;

    if (pAddrWin == NULL) {
	DB(mvOsPrintf("%s: ERR. pAddrWin is NULL pointer\n", __FUNCTION__ ));
	return MV_BAD_PTR;
    }

    for (winNumIndex = 0; winNumIndex < TSU_MAX_DECODE_WIN; winNumIndex++) {
	/* Do not check window itself */
	if (winNumIndex == winNum)
	    continue;

	/* Read base address enable register. Do not check disabled windows	*/
	baseAddrEnableReg = MV_REG_READ(MV_TSU_WIN_CTRL_REG(winNumIndex));

	/* Do not check disabled windows */
	if ((baseAddrEnableReg & TSU_WIN_CTRL_EN_MASK) == 0)
	    continue;

	/* Get window parameters */
	if (MV_OK != mvTsuWinRead(0, winNumIndex, &addrDecWin)) {
	    DB(mvOsPrintf("%s: ERR. TargetWinGet failed\n", __FUNCTION__ ));
	    return MV_ERROR;
	}

	if (MV_TRUE == mvWinOverlapTest(pAddrWin, &(addrDecWin.addrWin)))
	    return MV_TRUE;
    }

    return MV_FALSE;
}