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

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "mvCesa.h"
#include "mvCesaRegs.h"

MV_TARGET tdmaAddrDecPrioTable[] = {
#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
};

static MV_STATUS cesaWinOverlapDetect(MV_U8 chan, MV_U32 winNum, MV_ADDR_WIN *pAddrWin);
static MV_STATUS mvCesaTdmaWinRead(MV_U8 chan, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin);
static MV_STATUS mvCesaTdmaWinWrite(MV_U8 chan, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin);

/*******************************************************************************
* mvCesaTdmaWinRead.
*
* DESCRIPTION:
*       Read TDMA target address window.
*
* INPUT:
*	chan - Channel ID.
*       winNum - TDMA target address decode window number.
*
* OUTPUT:
*       pDecWin - TDMA target window data structure.
*
* RETURN:
*	MV_BAD_PARAM if winNum is invalid.
*	MV_ERROR otherwise.
*
*******************************************************************************/
static MV_STATUS mvCesaTdmaWinRead(MV_U8 chan, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin)
{
	MV_U32 sizeReg, baseReg;
	MV_U32 size;

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

	baseReg = MV_REG_READ(MV_CESA_TDMA_BASE_ADDR_REG(chan, winNum));
	sizeReg = MV_REG_READ(MV_CESA_TDMA_WIN_CTRL_REG(chan, winNum));

	/* Check if window is enabled   */
	if (sizeReg & MV_CESA_TDMA_WIN_ENABLE_MASK) {
		pDecWin->enable = MV_TRUE;

		/* Extract window parameters from registers */
		pDecWin->targetId = (sizeReg & MV_CESA_TDMA_WIN_TARGET_MASK) >> MV_CESA_TDMA_WIN_TARGET_OFFSET;
		pDecWin->attrib = (sizeReg & MV_CESA_TDMA_WIN_ATTR_MASK) >> MV_CESA_TDMA_WIN_ATTR_OFFSET;

		size = (sizeReg & MV_CESA_TDMA_WIN_SIZE_MASK) >> MV_CESA_TDMA_WIN_SIZE_OFFSET;
		pDecWin->addrWin.size = (size + 1) * (1 << MV_CESA_TDMA_WIN_SIZE_OFFSET);
		pDecWin->addrWin.baseLow = (baseReg & MV_CESA_TDMA_WIN_BASE_MASK);
		pDecWin->addrWin.baseHigh = 0;
	} else {
		pDecWin->enable = MV_FALSE;
	}
	return MV_OK;
}

/*******************************************************************************
* mvCesaTdmaWinWrite
*
* DESCRIPTION:
*	This function writes the address decoding registers according to the
*	given window configuration.
*
* INPUT:
*	chan - Channel ID.
*       pAddrDecWin - CESA TDMA target window data structure.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_OK on success,
*	MV_BAD_PARAM if winNum is invalid or size is not a power of 2.
*	MV_ERROR otherwise.
*
*******************************************************************************/
static MV_STATUS mvCesaTdmaWinWrite(MV_U8 chan, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin)
{
	MV_U32 sizeReg, baseReg;
	MV_U32 size;

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

	/* Check if the requested window overlapps with current windows     */
	if (MV_TRUE == cesaWinOverlapDetect(chan, winNum, &pDecWin->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(pDecWin->addrWin.baseLow, pDecWin->addrWin.size)) {
		mvOsPrintf("mvCesaTdmaWinSet: Error setting CESA TDMA window %d.\n"
			   "Address 0x%08x is unaligned to size 0x%x.\n",
			   winNum, pDecWin->addrWin.baseLow, (MV_U32)pDecWin->addrWin.size);
		return MV_ERROR;
	}

	if (!MV_IS_POWER_OF_2(pDecWin->addrWin.size)) {
		mvOsPrintf("mvCesaTdmaWinWrite: Error setting CESA window %d. "
			   "Window size is not a power to 2.", winNum);
		return MV_BAD_PARAM;
	}

	size = (pDecWin->addrWin.size / (1 << MV_CESA_TDMA_WIN_SIZE_OFFSET)) - 1;

	/* set Size, Attributes and TargetID */
	sizeReg = (((pDecWin->targetId << MV_CESA_TDMA_WIN_TARGET_OFFSET) & MV_CESA_TDMA_WIN_TARGET_MASK) |
		   ((pDecWin->attrib << MV_CESA_TDMA_WIN_ATTR_OFFSET) & MV_CESA_TDMA_WIN_ATTR_MASK) |
		   ((size << MV_CESA_TDMA_WIN_SIZE_OFFSET) & MV_CESA_TDMA_WIN_SIZE_MASK));

	if (pDecWin->enable == MV_TRUE)
		sizeReg |= MV_CESA_TDMA_WIN_ENABLE_MASK;
	else
		sizeReg &= ~MV_CESA_TDMA_WIN_ENABLE_MASK;

	/* Update Base value  */
	baseReg = (pDecWin->addrWin.baseLow & MV_CESA_TDMA_WIN_BASE_MASK);

	MV_REG_WRITE(MV_CESA_TDMA_WIN_CTRL_REG(chan, winNum), sizeReg);
	MV_REG_WRITE(MV_CESA_TDMA_BASE_ADDR_REG(chan, winNum), baseReg);

	return MV_OK;
}

/*******************************************************************************
* cesaWinOverlapDetect - Detect CESA TDMA address windows overlapping
*
* DESCRIPTION:
*       An unpredicted behaviur is expected in case TDMA address decode
*       windows overlapps.
*       This function detects TDMA 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:
* 	chan	    - Channel ID
*       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 cesaWinOverlapDetect(MV_U8 chan, MV_U32 winNum, MV_ADDR_WIN *pAddrWin)
{
	MV_U32 winNumIndex;
	MV_UNIT_WIN_INFO addrDecWin;

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

		/* Get window parameters    */
		if (MV_OK != mvCesaTdmaWinRead(chan, winNumIndex, &addrDecWin)) {
			mvOsPrintf("%s: ERR. TargetWinGet 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;
}

MV_STATUS mvCesaTdmaWinInit(MV_U8 chan, 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 < MV_CESA_TDMA_ADDR_DEC_WIN; winNum++)
		MV_REG_BIT_RESET(MV_CESA_TDMA_WIN_CTRL_REG(chan, winNum), MV_CESA_TDMA_WIN_ENABLE_MASK);

	/* Go through all windows in user table until table terminator      */
	winNum = 0;
	while ((tdmaAddrDecPrioTable[winPrioIndex] != TBL_TERM) && (winNum < MV_CESA_TDMA_ADDR_DEC_WIN)) {

		addrDecWin = &addrWinMap[tdmaAddrDecPrioTable[winPrioIndex]];
		if (addrDecWin->enable == MV_TRUE) {
			if (MV_OK != mvCesaTdmaWinWrite(chan, winNum, addrDecWin)) {
				mvOsPrintf("mvCesaTdmaWinSet FAILED: winNum=%d\n", winNum);
				return MV_ERROR;
			}
			winNum++;
		}
		winPrioIndex++;
	}
	return MV_OK;
}