arch/arm/plat-feroceon/mv_hal/ts/mvTsuAddrDec.c

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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 
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*******************************************************************************/

#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;
}