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

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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
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

#include "mvFlash.h"

#undef MV_DEBUG

#ifdef MV_DEBUG
#define DB(x) x
#else
#define DB(x)
#endif

static MV_STATUS intelFlashStsGet(MV_FLASH_INFO *pFlash, MV_U32 sec, MV_BOOL enableReadCommand, MV_U32 *flashStatus);
static MV_VOID intelFlashStatusClr(MV_FLASH_INFO *pFlash);

/*******************************************************************************
* reset the flash
*******************************************************************************/
MV_VOID intelFlashReset(MV_FLASH_INFO *pFlash)
{
	flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_RST);
	return;
}

/*******************************************************************************
* intelFlashSecErase - Erase a sector.
*
* DESCRIPTION:
*	Erase a Flash sector.
*
* INPUT:
*       secNum	- sector Number.
*	pFlash	- flash information.
*
* OUTPUT:
*	None
*
* RETURN:
*       MV_OK if program completed successfully,
*	MV_TIMEOUT if timeout reached,
*	MV_FAIL otherwise.
*
*******************************************************************************/
MV_STATUS intelFlashSecErase(MV_FLASH_INFO *pFlash, MV_U32 secNum)
{
	MV_U32 i, status, flashStatus;

	DB(mvOsPrintf("Flash: intelFlashSecErase\n"));

	/* clear status */
	intelFlashStatusClr(pFlash);

	/* erase sequence */
	flashCmdSet(pFlash, 0, secNum, INTEL_CHIP_CMD_ERASE1);
	flashCmdSet(pFlash, 0, secNum, INTEL_CHIP_CMD_ERASE2);

	/* wait for erase to complete */
	for (i = 0; i < INTEL_EARASE_MILI_TIMEOUT; i++) {
		mvOsDelay(1);
		status = intelFlashStsGet(pFlash, 0, MV_TRUE, &flashStatus);
		if (MV_NOT_READY != status)
			return status;
	}
	mvOsPrintf("Flash: ERROR intelFlashSecErase timeout \n");

	return MV_TIMEOUT;
}

/*******************************************************************************
* intelFlashProg - Prog busWidth Bits into the address offest in the flash.
*
* DESCRIPTION:
*       This function writes busWidth data to a given flash offset.
*
* INPUT:
*       pFlash - Flash identifier structure (flash cockie).
*       offset - Offset from flash base address.
*       data   - 32bit data to be written to flash.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_OK if program completed successfully,
*	MV_TIMEOUT if timeout reached,
*	MV_FAIL otherwise.
*
*******************************************************************************/
MV_STATUS intelFlashProg(MV_FLASH_INFO *pFlash, MV_U32 offset, MV_U32 data)
{
	MV_U32 i, status, flashStatus;

	DB(mvOsPrintf("Flash: mvIntelFlashWr\n"));

	/* clear status */
	intelFlashStatusClr(pFlash);

	/* write sequence */
	flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_PROG);
	flashBusWidthDataWr(pFlash, offset + mvFlashBaseAddrGet(pFlash), data);

	/* wait for write to complete */
	for (i = 0; i < INTEL_PROG_TIMEOUT; i++) {
		status = intelFlashStsGet(pFlash, 0, MV_TRUE, &flashStatus);
		if (MV_NOT_READY != status)
			return status;
	}
	mvOsPrintf("Flash: ERROR intelFlashSecErase timeout \n");

	return MV_TIMEOUT;
}

MV_U32 intelFlashGetHwBuffSize(MV_FLASH_INFO *pFlash)
{
	MV_U32 buffSize;

	buffSize = mvFlashNumOfDevGet(pFlash) * pFlash->flashSpec.HwBuffLen;
	return buffSize;
}

/*******************************************************************************
* intelFlashBufferProg - Prog hw buff into the address offest in the flash.
*
* DESCRIPTION:
*       This function writes busWidth data to a given flash offset.
*
* INPUT:
*       pFlash - Flash identifier structure (flash cockie).
*       offset - Offset from flash base address.
*       pData  - buffer (32 byte) data to be written to flash.
*
* OUTPUT:
*       None.
*
* RETURN:
*   MV_OK if program completed successfully,
*   MV_BAD_PARAM illegal param
*	MV_TIMEOUT if timeout reached,
*	MV_FAIL otherwise.
*
*******************************************************************************/
MV_STATUS intelFlashHwBufferProg(MV_FLASH_INFO *pFlash, MV_U32 offset, MV_U32 byteCount, MV_U8 *pData)
{
	MV_U32 i, status, flashStatus;
	MV_U32 buffSize, sec, wordCount, busWidth;
	MV_U32 offInBuff, absOffInFlash;
	MV_U32 data, j;

	DB(mvOsPrintf("Flash: intelFlashBufferProg\n"));
	buffSize = (intelFlashGetHwBuffSize(pFlash));
	if (buffSize == 0)
		return MV_BAD_PARAM;

	if (0 != (byteCount % buffSize))
		return MV_BAD_PARAM;

	/* has to be aligned */
	if ((offset % buffSize) != 0)
		return MV_BAD_PARAM;
#ifndef CONFIG_MARVELL
	if (pData == NULL)
		return MV_BAD_PARAM;
#endif

	busWidth = mvFlashBusWidthGet(pFlash);
	wordCount = (pFlash->flashSpec.HwBuffLen / mvFlashDevWidthGet(pFlash));
	absOffInFlash = mvFlashBaseAddrGet(pFlash) + offset;
	offInBuff = 0;

	/* clear status */
	intelFlashStatusClr(pFlash);

	do {

		/* Start the 'write to buffer' sequence */
		sec = mvFlashInWhichSec(pFlash, offset);

		i = 0;
		do {
			flashCmdSet(pFlash, 0, sec, INTEL_CHIP_CMD_WR_BUF);

			status = intelFlashStsGet(pFlash, sec, MV_FALSE, &flashStatus);

			if ((i++ > INTEL_PROG_TIMEOUT) && (status != MV_OK)) {
				DB(printf("intelFlashHwBufferProg1: Timeout:offset = 0x%x flashStatus =0x%x\n",
					  offset, flashStatus));
				return status;
			}

		} while (status != MV_OK);

		/* write num of words to write minus 1 */
		flashCmdSet(pFlash, 0, sec, wordCount - 1);

		for (i = 0; i < wordCount * mvFlashNumOfDevGet(pFlash); i += mvFlashNumOfDevGet(pFlash)) {
			data = 0;
			switch (busWidth) {
			case 4:
				for (j = 0; j < 4; j++) {
					/* [44][55][66][77] -> 0x44556677  */
					data |= (pData[offInBuff + j] & FLASH_MASK_8BIT) << (8 * (3 - j));
				}
				data = MV_32BIT_BE(data);
				break;
			case 2:
				for (j = 0; j < 2; j++) {
					/* [44][55] -> 0x4455  */
					data |= (pData[offInBuff + j] & FLASH_MASK_8BIT) << (8 * (1 - j));
				}
				data = MV_16BIT_BE(data);
				break;
			case 1:
				data = *(MV_U8 *) (((MV_U32) pData) + offInBuff);
				break;
			}
			flashBusWidthDataWr(pFlash, absOffInFlash, data);

			offInBuff += busWidth;
			absOffInFlash += busWidth;
		}

		flashCmdSet(pFlash, 0, sec, INTEL_CHIP_CMD_CONFIRM_BUF);

		/* check status  */
		for (i = 0; i < INTEL_PROG_TIMEOUT; i++) {
			status = intelFlashStsGet(pFlash, sec, MV_FALSE, &flashStatus);
			if (status == MV_OK)
				break;
		}

		if (status != MV_OK)
			break;

		byteCount -= buffSize;
	} while (byteCount);

	if (status != MV_OK) {

		DB(printf("intelFlashHwBufferProg2: Timeout:offset = 0x%x flashStatus =0x%x\n", offset, flashStatus));

		return status;
	}

	return MV_OK;
}

/*******************************************************************************
* intelSecLockGet - Return a sector Lock Bit status.
*
* DESCRIPTION:
*	Return a sector Lock Bit status.
*
*
* INPUT:
*       pFlash	- Flash structure.
*       secNum 	- Sector Number.
*
* OUTPUT:
*	None.
*
* RETURN:
*       MV_TRUE if lock is set
*	MV_FALSE if lock isn't set
*
*******************************************************************************/
MV_BOOL intelFlashSecLockGet(MV_FLASH_INFO *pFlash, MV_U32 secNum)
{
	MV_U32 status;

	DB(mvOsPrintf("Flash: intelSecLockGet sector %d\n", secNum));

	/* clear status */
	intelFlashStatusClr(pFlash);

	/* Some Micron flashes don't use A0 address for Identifier and
	   Lock information, so in order to read Identifier and lock information
	   properly we will do the following workarround:
	   If our device width is 1 (x8) then if address 0 equal to address 1
	   and address 2 equal to address 3 ,then we have this case (A0 is not used)
	   and then we will issue the address without A0 to read the Identifier and
	   lock information properly */

	/* read Query sequence */
	flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_RD_QUERY);

	if ((pFlash->devWidth == 1) &&
	    ((flashBusWidthRd(pFlash, flashAddrExt(pFlash, 0, 0)) ==
	      flashBusWidthRd(pFlash, flashAddrExt(pFlash, 1, 0))) &&
	     (flashBusWidthRd(pFlash, flashAddrExt(pFlash, 2, 0)) ==
	      flashBusWidthRd(pFlash, flashAddrExt(pFlash, 3, 0))))) {
		status = flashBusWidthRd(pFlash, flashAddrExt(pFlash, 4, secNum));

	} else
		status = flashBusWidthRd(pFlash, flashAddrExt(pFlash, 2, secNum));

	if ((status & flashDataExt(pFlash, INTEL_CHIP_RD_ID_LOCK)) != 0) {
		DB(mvOsPrintf("Flash: intelSecLockGet sector %d is locked \n", secNum));
		return MV_TRUE;
	}

	return MV_FALSE;
}

/*******************************************************************************
* intelSecLock - Lock/Unlock a Sector in the flash for Writing.
*
* DESCRIPTION:
*       Lock/Unlock a Sector in the flash for Writing.
*
* INPUT:
*       pFlash	- Flash identifier structure.
*       secNum	- Sector Number.
*       enable	- MV_TRUE for Lock MV_FALSE for un-lock.
*
* OUTPUT:
*      None
*
* RETURN:
*       MV_OK if program completed successfully,
*	MV_TIMEOUT if timeout reached,
*	MV_FAIL otherwise.
*
*******************************************************************************/
MV_STATUS intelFlashSecLock(MV_FLASH_INFO *pFlash, MV_U32 secNum, MV_BOOL enable)
{
	MV_U32 status, intelLockEna, i, flashStatus;

	status = MV_ERROR;

	DB(mvOsPrintf("Flash: intelSecLock"));

	/* lock */
	if (enable == MV_TRUE) {
		DB(mvOsPrintf("Flash: intelSecLock Lock sector %d \n", secNum));
		intelLockEna = INTEL_CHIP_CMD_SET_LOCK_BLK;
	} else {		/* unlock */
		DB(mvOsPrintf("Flash: intelSecLock Unlock sector %d \n", secNum));
		intelLockEna = INTEL_CHIP_CMD_CLR_LOCK_BLK;
	}

	/* clear status */
	intelFlashStatusClr(pFlash);

	/* Un/lock sequence */
	flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_LOCK);
	flashCmdSet(pFlash, 0, secNum, intelLockEna);

	/* wait for write to complete */
	for (i = 0; i < INTEL_LOCK_MILI_TIMEOUT; i++) {
		mvOsDelay(1);
		status = intelFlashStsGet(pFlash, 0, MV_TRUE, &flashStatus);
		if (status != MV_NOT_READY)
			break;
	}
	/* if timeout */
	if (i >= INTEL_LOCK_MILI_TIMEOUT) {
		mvOsPrintf("Flash: ERROR intelSecLock timeout \n");
		return MV_TIMEOUT;
	}
	/* if completed successfully */
	if (MV_OK == status) {
		/* Unprotect one sector, which means unprotect all flash
		 * and reprotect the other protected sectors.
		 */
		if (enable == MV_FALSE) {
			for (i = 0; i < mvFlashNumOfSecsGet(pFlash); i++)
				if ((i != secNum) && (MV_TRUE == mvFlashSecLockGet(pFlash, i)))
					if (MV_OK != intelFlashSecLock(pFlash, i, MV_TRUE))
						return MV_FAIL;
		}
		return MV_OK;
	}
	/* otherwise FAIL */
	return MV_FAIL;
}

/*******************************************************************************
* Check the Flash Status and return:
*	MV_OK if status is ready and there isn't any error.
*	MV_FAIL if status is ready and there is an error.
*	MV_NOT_READY if status isn't ready.
*******************************************************************************/
static MV_STATUS intelFlashStsGet(MV_FLASH_INFO *pFlash, MV_U32 sec, MV_BOOL enableReadCommand, MV_U32 *flashStatus)
{
	MV_U32 status;

	if (enableReadCommand)
		flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_RD_STAT);
	status = flashBusWidthRd(pFlash, pFlash->baseAddr + mvFlashSecOffsGet(pFlash, sec));

	*flashStatus = status;

	if ((status & flashDataExt(pFlash, INTEL_CHIP_STAT_RDY)) == flashDataExt(pFlash, INTEL_CHIP_STAT_RDY)) {
		DB(mvOsPrintf("Flash: intelFlashStatusChk value is ready \n"));
		if ((status & flashDataExt(pFlash, INTEL_CHIP_STAT_ERR)) != 0) {
			mvOsPrintf("Flash: intelFlashStatusChk value has ERROR %x \n", status);
			return MV_FAIL;
		}
		return MV_OK;
	}

	DB(mvOsPrintf("Flash: intelFlashStatusChk staus is %x and should %x \n",
		      status, flashDataExt(pFlash, INTEL_CHIP_STAT_RDY)));
	return MV_NOT_READY;
}

/*******************************************************************************
* Clear the Flash Status.
*******************************************************************************/
static MV_VOID intelFlashStatusClr(MV_FLASH_INFO *pFlash)
{
	flashCmdSet(pFlash, 0, 0, INTEL_CHIP_CMD_CLR_STAT);
	return;
}