arch/arm/plat-feroceon/mv_hal/sdmmc/mvSdmmcAddrDec.c

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

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "mvSysSdmmcConfig.h"
#include "mvSdmmc.h"

#define MV_SDMMC_MAX_ADDR_DECODE_WIN 4

#define MV_SDMMC_WIN_CTRL_REG(dev, win)        (MV_SDMMC_REGS_BASE + 0x108 + ((win)<<3))
#define MV_SDMMC_WIN_BASE_REG(dev, win)        (MV_SDMMC_REGS_BASE + 0x10c + ((win)<<3))

/* BITs in Windows 0-3 Control and Base Registers */
#define MV_SDMMC_WIN_ENABLE_BIT               0
#define MV_SDMMC_WIN_ENABLE_MASK              (1<<MV_SDMMC_WIN_ENABLE_BIT)

#define MV_SDMMC_WIN_TARGET_OFFSET            4
#define MV_SDMMC_WIN_TARGET_MASK              (0xF<<MV_SDMMC_WIN_TARGET_OFFSET)

#define MV_SDMMC_WIN_ATTR_OFFSET              8
#define MV_SDMMC_WIN_ATTR_MASK                (0xFF<<MV_SDMMC_WIN_ATTR_OFFSET)

#define MV_SDMMC_WIN_SIZE_OFFSET              16
#define MV_SDMMC_WIN_SIZE_MASK                (0xFFFF<<MV_SDMMC_WIN_SIZE_OFFSET)

#define MV_SDMMC_WIN_BASE_OFFSET              16
#define MV_SDMMC_WIN_BASE_MASK                (0xFFFF<<MV_SDMMC_WIN_BASE_OFFSET)

#define MV_SDMMC_WIN_SIZE_ALIGN		    _64K

MV_TARGET sdmmcAddrDecPrioTab[] = {
#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
#if defined(MV_INCLUDE_PEX)
	PEX0_MEM,
#endif
	TBL_TERM
};

/*******************************************************************************
* sdmmcWinOverlapDetect - Detect SDMMC address windows overlapping
*
* DESCRIPTION:
*       An unpredicted behaviur is expected in case SDMMC address decode
*       windows overlapps.
*       This function detects SDMMC address decode windows overlapping of a
*       specified window. The function does not check the window itself for
*       overlapping. 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 sdmmcWinOverlapDetect(int dev, MV_U32 winNum, MV_ADDR_WIN *pAddrWin)
{
	MV_U32 winNumIndex;
	MV_UNIT_WIN_INFO addrDecWin;

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

		/* Get window parameters    */
		if (MV_OK != mvSdmmcWinRead(dev, winNumIndex, &addrDecWin)) {
			mvOsPrintf("%s: ERR. mvSdmmcWinRead failed\n", __func__);
			return MV_ERROR;
		}

		/* Do not check disabled windows    */
		if (addrDecWin.enable == MV_FALSE)
			continue;

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

/*******************************************************************************
* mvSdmmcWinWrite - Set SDMMC target address window
*
* 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 SDMMC will be able to access the
*       target within the address window.
*
* INPUT:
*       winNum      - SDMMC target address decode window number.
*       pAddrDecWin - SDMMC 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 mvSdmmcWinWrite(MV_U32 dev, MV_U32 winNum, MV_UNIT_WIN_INFO *pAddrDecWin)
{
	MV_U32 sizeReg, baseReg;

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

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

	/* check if address is aligned to the size */
	if (MV_IS_NOT_ALIGN(pAddrDecWin->addrWin.baseLow, pAddrDecWin->addrWin.size)) {
		mvOsPrintf("mvSdmmcWinWrite:Error setting SDMMC 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 & MV_SDMMC_WIN_BASE_MASK;
	sizeReg = (pAddrDecWin->addrWin.size / MV_SDMMC_WIN_SIZE_ALIGN) - 1;
	sizeReg = sizeReg << MV_SDMMC_WIN_SIZE_OFFSET;

	/* set attributes */
	sizeReg &= ~MV_SDMMC_WIN_ATTR_MASK;
	sizeReg |= (pAddrDecWin->attrib << MV_SDMMC_WIN_ATTR_OFFSET);

	/* set target ID */
	sizeReg &= ~MV_SDMMC_WIN_TARGET_MASK;
	sizeReg |= (pAddrDecWin->targetId << MV_SDMMC_WIN_TARGET_OFFSET);

	if (pAddrDecWin->enable == MV_TRUE)
		sizeReg |= MV_SDMMC_WIN_ENABLE_MASK;
	else
		sizeReg &= ~MV_SDMMC_WIN_ENABLE_MASK;

	MV_REG_WRITE(MV_SDMMC_WIN_CTRL_REG(dev, winNum), sizeReg);
	MV_REG_WRITE(MV_SDMMC_WIN_BASE_REG(dev, winNum), baseReg);

	return MV_OK;
}

/*******************************************************************************
* mvSdmmcWinRead - Read SDMMC peripheral target address window.
*
* DESCRIPTION:
*       Get SDMMC peripheral target address window.
*
* INPUT:
*       winNum - SDMMC target address decode window number.
*
* OUTPUT:
*       pAddrDecWin - SDMMC target window data structure.
*
* RETURN:
*       MV_ERROR if register parameters are invalid.
*
*******************************************************************************/
MV_STATUS mvSdmmcWinRead(MV_U32 dev, MV_U32 winNum, MV_UNIT_WIN_INFO *pAddrDecWin)
{
	MV_U32 sizeReg, baseReg;
	MV_U32 sizeRegVal;

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

	baseReg = MV_REG_READ(MV_SDMMC_WIN_BASE_REG(dev, winNum));
	sizeReg = MV_REG_READ(MV_SDMMC_WIN_CTRL_REG(dev, winNum));

	/* Extract base address and size    */
	sizeRegVal = (sizeReg & MV_SDMMC_WIN_SIZE_MASK) >> MV_SDMMC_WIN_SIZE_OFFSET;
	pAddrDecWin->addrWin.size = (sizeRegVal + 1) * MV_SDMMC_WIN_SIZE_ALIGN;
	pAddrDecWin->addrWin.baseLow = baseReg & MV_SDMMC_WIN_BASE_MASK;
	pAddrDecWin->addrWin.baseHigh = 0;

	/* attrib and targetId              */
	pAddrDecWin->attrib = (sizeReg & MV_SDMMC_WIN_ATTR_MASK) >> MV_SDMMC_WIN_ATTR_OFFSET;
	pAddrDecWin->targetId = (sizeReg & MV_SDMMC_WIN_TARGET_MASK) >> MV_SDMMC_WIN_TARGET_OFFSET;

	/* Check if window is enabled       */
	if (sizeReg & MV_SDMMC_WIN_ENABLE_MASK)
		pAddrDecWin->enable = MV_TRUE;
	else
		pAddrDecWin->enable = MV_FALSE;

	return MV_OK;
}

/*******************************************************************************
* mvSdmmcWinInit - Initialize the integrated SDMMC target address window.
*
* DESCRIPTION:
*       Initialize the SDMMC peripheral target address window.
*
* INPUT:
*
*
* OUTPUT:
*
*
* RETURN:
*       MV_ERROR if register parameters are invalid.
*
*******************************************************************************/
MV_STATUS mvSdmmcWinInit(MV_UNIT_WIN_INFO *addrWinMap)
{
	MV_U32 winNum;
	MV_UNIT_WIN_INFO *addrDecWin;
	MV_U32 winPrioIndex = 0;

	/* Initiate Sdmmc address decode */

	/* First disable all address decode windows */
	for (winNum = 0; winNum < MV_SDMMC_MAX_ADDR_DECODE_WIN; winNum++) {
		MV_U32 regVal = MV_REG_READ(MV_SDMMC_WIN_CTRL_REG(0, winNum));
		regVal &= ~MV_SDMMC_WIN_ENABLE_MASK;
		MV_REG_WRITE(MV_SDMMC_WIN_CTRL_REG(0, winNum), regVal);
	}

	winNum = 0;
	while ((sdmmcAddrDecPrioTab[winPrioIndex] != TBL_TERM) && (winNum < MV_SDMMC_MAX_ADDR_DECODE_WIN)) {
		addrDecWin = &addrWinMap[sdmmcAddrDecPrioTab[winPrioIndex]];
		if (addrDecWin->enable == MV_TRUE) {
			if (MV_OK != mvSdmmcWinWrite(0, winNum, addrDecWin))
				return MV_ERROR;
			winNum++;
		}
		winPrioIndex++;
	}
	return MV_OK;
}