[people/ms/u-boot.git] / board / bf533-ezkit / flash.c

/*
 * U-boot - flash.c Flash driver for PSD4256GV
 *
 * Copyright (c) 2005 blackfin.uclinux.org
 * This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
 *
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <asm/io.h>
#include "flash-defines.h"

void flash_reset(void)
{
	reset_flash();
}

unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
{
	int id = 0, i = 0;
	static int FlagDev = 1;

	id = get_codes();
	if (FlagDev) {
#ifdef DEBUG
		printf("Device ID of the Flash is %x\n", id);
#endif
		FlagDev = 0;
	}
	info->flash_id = id;

	switch (bank_flag) {
	case 0:
		for (i = PriFlashABegin; i < SecFlashABegin; i++)
			info->start[i] = (baseaddr + (i * AFP_SectorSize1));
		info->size = 0x200000;
		info->sector_count = 32;
		break;
	case 1:
		info->start[0] = baseaddr + SecFlashASec1Off;
		info->start[1] = baseaddr + SecFlashASec2Off;
		info->start[2] = baseaddr + SecFlashASec3Off;
		info->start[3] = baseaddr + SecFlashASec4Off;
		info->size = 0x10000;
		info->sector_count = 4;
		break;
	case 2:
		info->start[0] = baseaddr + SecFlashBSec1Off;
		info->start[1] = baseaddr + SecFlashBSec2Off;
		info->start[2] = baseaddr + SecFlashBSec3Off;
		info->start[3] = baseaddr + SecFlashBSec4Off;
		info->size = 0x10000;
		info->sector_count = 4;
		break;
	}
	return (info->size);
}

unsigned long flash_init(void)
{
	unsigned long size_b0, size_b1, size_b2;
	int i;

	size_b0 = size_b1 = size_b2 = 0;
#ifdef DEBUG
	printf("Flash Memory Start 0x%x\n", CFG_FLASH_BASE);
	printf("Memory Map for the Flash\n");
	printf("0x20000000 - 0x200FFFFF Flash A Primary (1MB)\n");
	printf("0x20100000 - 0x201FFFFF Flash B Primary (1MB)\n");
	printf("0x20200000 - 0x2020FFFF Flash A Secondary (64KB)\n");
	printf("0x20280000 - 0x2028FFFF Flash B Secondary (64KB)\n");
	printf("Please type command flinfo for information on Sectors \n");
#endif
	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0], 0);
	size_b1 = flash_get_size(CFG_FLASH0_BASE, &flash_info[1], 1);
	size_b2 = flash_get_size(CFG_FLASH0_BASE, &flash_info[2], 2);

	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
		printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
		       size_b0, size_b0 >> 20);
	}

	(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH0_BASE,
			    (flash_info[0].start[2] - 1), &flash_info[0]);

	return (size_b0 + size_b1 + size_b2);
}

void flash_print_info(flash_info_t * info)
{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
		printf("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id) {
	case FLASH_PSD4256GV:
		printf("ST Microelectronics ");
		break;
	default:
		printf("Unknown Vendor: (0x%08X) ", info->flash_id);
		break;
	}
	for (i = 0; i < info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf("\n   ");
		printf(" %08lX%s",
		       info->start[i], info->protect[i] ? " (RO)" : "     ");
	}
	printf("\n");
	return;
}

int flash_erase(flash_info_t * info, int s_first, int s_last)
{
	int cnt = 0, i;
	int prot, sect;

	prot = 0;
	for (sect = s_first; sect <= s_last; ++sect) {
		if (info->protect[sect])
			prot++;
	}

	if (prot)
		printf("- Warning: %d protected sectors will not be erased!\n",
		       prot);
	else
		printf("\n");

	cnt = s_last - s_first + 1;

	if (cnt == FLASH_TOT_SECT) {
		printf("Erasing flash, Please Wait \n");
		if (erase_flash() < 0) {
			printf("Erasing flash failed \n");
			return FLASH_FAIL;
		}
	} else {
		printf("Erasing Flash locations, Please Wait\n");
		for (i = s_first; i <= s_last; i++) {
			if (info->protect[i] == 0) {	/* not protected */
				if (erase_block_flash(i, info->start[i]) < 0) {
					printf("Error Sector erasing \n");
					return FLASH_FAIL;
				}
			}
		}
	}
	return FLASH_SUCCESS;
}

int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
	int ret;

	ret = write_data(addr, cnt, 1, (int *)src);
	if (ret == FLASH_FAIL)
		return ERR_NOT_ERASED;
	return FLASH_SUCCESS;
}

int write_data(long lStart, long lCount, long lStride, int *pnData)
{
	long i = 0;
	int j = 0;
	unsigned long ulOffset = lStart - CFG_FLASH_BASE;
	int d;
	int iShift = 0;
	int iNumWords = 2;
	int nLeftover = lCount % 4;
	int nSector = 0;

	for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
		for (iShift = 0, j = 0; (j < iNumWords);
		     j++, ulOffset += (lStride * 2)) {
			if ((ulOffset >= INVALIDLOCNSTART)
			    && (ulOffset < INVALIDLOCNEND)) {
				printf
				    ("Invalid locations, Try writing to another location \n");
				return FLASH_FAIL;
			}
			get_sector_number(ulOffset, &nSector);
			read_flash(ulOffset, &d);
			if (d != 0xffff) {
				printf
				    ("Flash not erased at offset 0x%x Please erase to reprogram \n",
				     ulOffset);
				return FLASH_FAIL;
			}
			unlock_flash(ulOffset);
			if (write_flash(ulOffset, (pnData[i] >> iShift)) < 0) {
				printf("Error programming the flash \n");
				return FLASH_FAIL;
			}
			iShift += 16;
		}
	}
	if (nLeftover > 0) {
		if ((ulOffset >= INVALIDLOCNSTART)
		    && (ulOffset < INVALIDLOCNEND))
			return FLASH_FAIL;
		get_sector_number(ulOffset, &nSector);
		read_flash(ulOffset, &d);
		if (d != 0xffff) {
			printf
			    ("Flash already programmed. Please erase to reprogram \n");
			printf("uloffset = 0x%x \t d = 0x%x\n", ulOffset, d);
			return FLASH_FAIL;
		}
		unlock_flash(ulOffset);
		if (write_flash(ulOffset, pnData[i]) < 0) {
			printf("Error programming the flash \n");
			return FLASH_FAIL;
		}
	}
	return FLASH_SUCCESS;
}

int read_data(long ulStart, long lCount, long lStride, int *pnData)
{
	long i = 0;
	int j = 0;
	long ulOffset = ulStart;
	int iShift = 0;
	int iNumWords = 2;
	int nLeftover = lCount % 4;
	int nHi, nLow;
	int nSector = 0;

	for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
		for (iShift = 0, j = 0; j < iNumWords; j += 2) {
			if ((ulOffset >= INVALIDLOCNSTART)
			    && (ulOffset < INVALIDLOCNEND))
				return FLASH_FAIL;

			get_sector_number(ulOffset, &nSector);
			read_flash(ulOffset, &nLow);
			ulOffset += (lStride * 2);
			read_flash(ulOffset, &nHi);
			ulOffset += (lStride * 2);
			pnData[i] = (nHi << 16) | nLow;
		}
	}
	if (nLeftover > 0) {
		if ((ulOffset >= INVALIDLOCNSTART)
		    && (ulOffset < INVALIDLOCNEND))
			return FLASH_FAIL;

		get_sector_number(ulOffset, &nSector);
		read_flash(ulOffset, &pnData[i]);
	}
	return FLASH_SUCCESS;
}

int write_flash(long nOffset, int nValue)
{
	long addr;

	addr = (CFG_FLASH_BASE + nOffset);
	sync();
	*(unsigned volatile short *)addr = nValue;
	sync();
	if (poll_toggle_bit(nOffset) < 0)
		return FLASH_FAIL;
	return FLASH_SUCCESS;
}

int read_flash(long nOffset, int *pnValue)
{
	int nValue = 0x0;
	long addr = (CFG_FLASH_BASE + nOffset);

	if (nOffset != 0x2)
		reset_flash();
	sync();
	nValue = *(volatile unsigned short *)addr;
	sync();
	*pnValue = nValue;
	return TRUE;
}

int poll_toggle_bit(long lOffset)
{
	unsigned int u1, u2;
	unsigned long timeout = 0xFFFFFFFF;
	volatile unsigned long *FB =
	    (volatile unsigned long *)(0x20000000 + lOffset);
	while (1) {
		if (timeout < 0)
			break;
		u1 = *(volatile unsigned short *)FB;
		u2 = *(volatile unsigned short *)FB;
		if ((u1 & 0x0040) == (u2 & 0x0040))
			return FLASH_SUCCESS;
		if ((u2 & 0x0020) == 0x0000)
			continue;
		u1 = *(volatile unsigned short *)FB;
		if ((u2 & 0x0040) == (u1 & 0x0040))
			return FLASH_SUCCESS;
		else {
			reset_flash();
			return FLASH_FAIL;
		}
		timeout--;
	}
	printf("Time out occured \n");
	if (timeout < 0)
		return FLASH_FAIL;
}

void reset_flash(void)
{
	write_flash(WRITESEQ1, RESET_VAL);
	/* Wait for 10 micro seconds */
	udelay(10);
}

int erase_flash(void)
{
	write_flash(WRITESEQ1, WRITEDATA1);
	write_flash(WRITESEQ2, WRITEDATA2);
	write_flash(WRITESEQ3, WRITEDATA3);
	write_flash(WRITESEQ4, WRITEDATA4);
	write_flash(WRITESEQ5, WRITEDATA5);
	write_flash(WRITESEQ6, WRITEDATA6);

	if (poll_toggle_bit(0x0000) < 0)
		return FLASH_FAIL;

	write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
	write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
	write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
	write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
	write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
	write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);

	if (poll_toggle_bit(SecFlashASec1Off) < 0)
		return FLASH_FAIL;

	write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
	write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
	write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
	write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
	write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
	write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);

	if (poll_toggle_bit(PriFlashBOff) < 0)
		return FLASH_FAIL;

	write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
	write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
	write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
	write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
	write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
	write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);

	if (poll_toggle_bit(SecFlashBOff) < 0)
		return FLASH_FAIL;

	return FLASH_SUCCESS;
}

int erase_block_flash(int nBlock, unsigned long address)
{
	long ulSectorOff = 0x0;

	if ((nBlock < 0) || (nBlock > AFP_NumSectors))
		return FALSE;

	ulSectorOff = (address - CFG_FLASH_BASE);

	write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
	write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
	write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
	write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
	write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);

	write_flash(ulSectorOff, BlockEraseVal);

	if (poll_toggle_bit(ulSectorOff) < 0)
		return FLASH_FAIL;

	return FLASH_SUCCESS;
}

void unlock_flash(long ulOffset)
{
	unsigned long ulOffsetAddr = ulOffset;
	ulOffsetAddr &= 0xFFFF0000;

	write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
	write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
	write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
}

int get_codes()
{
	int dev_id = 0;

	write_flash(WRITESEQ1, GETCODEDATA1);
	write_flash(WRITESEQ2, GETCODEDATA2);
	write_flash(WRITESEQ3, GETCODEDATA3);

	read_flash(0x0002, &dev_id);
	dev_id &= 0x00FF;

	reset_flash();

	return dev_id;
}

void get_sector_number(long ulOffset, int *pnSector)
{
	int nSector = 0;

	if (ulOffset >= SecFlashAOff) {
		if ((ulOffset < SecFlashASec1Off)
		    && (ulOffset < SecFlashASec2Off)) {
			nSector = SECT32;
		} else if ((ulOffset >= SecFlashASec2Off)
			   && (ulOffset < SecFlashASec3Off)) {
			nSector = SECT33;
		} else if ((ulOffset >= SecFlashASec3Off)
			   && (ulOffset < SecFlashASec4Off)) {
			nSector = SECT34;
		} else if ((ulOffset >= SecFlashASec4Off)
			   && (ulOffset < SecFlashAEndOff)) {
			nSector = SECT35;
		}
	} else if (ulOffset >= SecFlashBOff) {
		if ((ulOffset < SecFlashBSec1Off)
		    && (ulOffset < SecFlashBSec2Off)) {
			nSector = SECT36;
		}
		if ((ulOffset < SecFlashBSec2Off)
		    && (ulOffset < SecFlashBSec3Off)) {
			nSector = SECT37;
		}
		if ((ulOffset < SecFlashBSec3Off)
		    && (ulOffset < SecFlashBSec4Off)) {
			nSector = SECT38;
		}
		if ((ulOffset < SecFlashBSec4Off)
		    && (ulOffset < SecFlashBEndOff)) {
			nSector = SECT39;
		}
	} else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
		nSector = ulOffset & 0xffff0000;
		nSector = ulOffset >> 16;
		nSector = nSector & 0x000ff;
	}

	if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
		*pnSector = nSector;
	}
}
Commit	Line	Data
6cb142fa WD	1	/*
	2	* U-boot - flash.c Flash driver for PSD4256GV
	3	*
	4	* Copyright (c) 2005 blackfin.uclinux.org
	5	* This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
	6	*
	7	* (C) Copyright 2000-2004
	8	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	9	*
	10	* See file CREDITS for list of people who contributed to this
	11	* project.
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License as
	15	* published by the Free Software Foundation; either version 2 of
	16	* the License, or (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	26	* MA 02111-1307 USA
	27	*/
	28
8440bb14	29	#include <asm/io.h>
6cb142fa WD	30	#include "flash-defines.h"
	31
	32	void flash_reset(void)
	33	{
	34	reset_flash();
	35	}
	36
3f0606ad	37	unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
6cb142fa WD	38	{
	39	int id = 0, i = 0;
	40	static int FlagDev = 1;
	41
	42	id = get_codes();
3f0606ad	43	if (FlagDev) {
6cb142fa WD	44	#ifdef DEBUG
	45	printf("Device ID of the Flash is %x\n", id);
	46	#endif
	47	FlagDev = 0;
	48	}
	49	info->flash_id = id;
	50
	51	switch (bank_flag) {
	52	case 0:
	53	for (i = PriFlashABegin; i < SecFlashABegin; i++)
	54	info->start[i] = (baseaddr + (i * AFP_SectorSize1));
	55	info->size = 0x200000;
	56	info->sector_count = 32;
	57	break;
	58	case 1:
	59	info->start[0] = baseaddr + SecFlashASec1Off;
	60	info->start[1] = baseaddr + SecFlashASec2Off;
	61	info->start[2] = baseaddr + SecFlashASec3Off;
	62	info->start[3] = baseaddr + SecFlashASec4Off;
	63	info->size = 0x10000;
	64	info->sector_count = 4;
	65	break;
	66	case 2:
	67	info->start[0] = baseaddr + SecFlashBSec1Off;
	68	info->start[1] = baseaddr + SecFlashBSec2Off;
	69	info->start[2] = baseaddr + SecFlashBSec3Off;
	70	info->start[3] = baseaddr + SecFlashBSec4Off;
	71	info->size = 0x10000;
	72	info->sector_count = 4;
	73	break;
	74	}
	75	return (info->size);
	76	}
	77
	78	unsigned long flash_init(void)
	79	{
	80	unsigned long size_b0, size_b1, size_b2;
	81	int i;
	82
	83	size_b0 = size_b1 = size_b2 = 0;
	84	#ifdef DEBUG
	85	printf("Flash Memory Start 0x%x\n", CFG_FLASH_BASE);
	86	printf("Memory Map for the Flash\n");
	87	printf("0x20000000 - 0x200FFFFF Flash A Primary (1MB)\n");
	88	printf("0x20100000 - 0x201FFFFF Flash B Primary (1MB)\n");
	89	printf("0x20200000 - 0x2020FFFF Flash A Secondary (64KB)\n");
	90	printf("0x20280000 - 0x2028FFFF Flash B Secondary (64KB)\n");
	91	printf("Please type command flinfo for information on Sectors \n");
	92	#endif
	93	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
	94	flash_info[i].flash_id = FLASH_UNKNOWN;
	95	}
	96
	97	size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0], 0);
	98	size_b1 = flash_get_size(CFG_FLASH0_BASE, &flash_info[1], 1);
	99	size_b2 = flash_get_size(CFG_FLASH0_BASE, &flash_info[2], 2);
	100
	101	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size_b0 == 0) {
	102	printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
3f0606ad	103	size_b0, size_b0 >> 20);
6cb142fa WD	104	}
6cb142fa WD	105
3f0606ad AL	106	(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH0_BASE,
3f0606ad AL	107	(flash_info[0].start[2] - 1), &flash_info[0]);
6cb142fa WD	108
	109	return (size_b0 + size_b1 + size_b2);
	110	}
	111
	112	void flash_print_info(flash_info_t * info)
	113	{
	114	int i;
	115
	116	if (info->flash_id == FLASH_UNKNOWN) {
	117	printf("missing or unknown FLASH type\n");
	118	return;
	119	}
	120
	121	switch (info->flash_id) {
	122	case FLASH_PSD4256GV:
	123	printf("ST Microelectronics ");
	124	break;
	125	default:
3f0606ad	126	printf("Unknown Vendor: (0x%08X) ", info->flash_id);
6cb142fa WD	127	break;
	128	}
	129	for (i = 0; i < info->sector_count; ++i) {
	130	if ((i % 5) == 0)
	131	printf("\n ");
	132	printf(" %08lX%s",
3f0606ad	133	info->start[i], info->protect[i] ? " (RO)" : " ");
6cb142fa WD	134	}
	135	printf("\n");
	136	return;
	137	}
	138
	139	int flash_erase(flash_info_t * info, int s_first, int s_last)
	140	{
3f0606ad AL	141	int cnt = 0, i;
3f0606ad AL	142	int prot, sect;
6cb142fa WD	143
6cb142fa WD	144	prot = 0;
8e7b703a WD	145	for (sect = s_first; sect <= s_last; ++sect) {
	146	if (info->protect[sect])
	147	prot++;
	148	}
6cb142fa WD	149
6cb142fa WD	150	if (prot)
3f0606ad AL	151	printf("- Warning: %d protected sectors will not be erased!\n",
3f0606ad AL	152	prot);
8e7b703a	153	else
3f0606ad	154	printf("\n");
6cb142fa WD	155
	156	cnt = s_last - s_first + 1;
	157
	158	if (cnt == FLASH_TOT_SECT) {
	159	printf("Erasing flash, Please Wait \n");
3f0606ad	160	if (erase_flash() < 0) {
6cb142fa WD	161	printf("Erasing flash failed \n");
	162	return FLASH_FAIL;
	163	}
	164	} else {
	165	printf("Erasing Flash locations, Please Wait\n");
	166	for (i = s_first; i <= s_last; i++) {
	167	if (info->protect[i] == 0) { /* not protected */
3f0606ad	168	if (erase_block_flash(i, info->start[i]) < 0) {
6cb142fa WD	169	printf("Error Sector erasing \n");
	170	return FLASH_FAIL;
	171	}
	172	}
	173	}
	174	}
	175	return FLASH_SUCCESS;
	176	}
	177
	178	int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	179	{
	180	int ret;
	181
3f0606ad AL	182	ret = write_data(addr, cnt, 1, (int *)src);
3f0606ad AL	183	if (ret == FLASH_FAIL)
6cb142fa WD	184	return ERR_NOT_ERASED;
	185	return FLASH_SUCCESS;
	186	}
	187
6cb142fa WD	188	int write_data(long lStart, long lCount, long lStride, int *pnData)
	189	{
	190	long i = 0;
	191	int j = 0;
	192	unsigned long ulOffset = lStart - CFG_FLASH_BASE;
	193	int d;
	194	int iShift = 0;
	195	int iNumWords = 2;
	196	int nLeftover = lCount % 4;
	197	int nSector = 0;
	198
	199	for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
	200	for (iShift = 0, j = 0; (j < iNumWords);
3f0606ad	201	j++, ulOffset += (lStride * 2)) {
6cb142fa	202	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	203	&& (ulOffset < INVALIDLOCNEND)) {
	204	printf
	205	("Invalid locations, Try writing to another location \n");
6cb142fa WD	206	return FLASH_FAIL;
	207	}
	208	get_sector_number(ulOffset, &nSector);
3f0606ad AL	209	read_flash(ulOffset, &d);
	210	if (d != 0xffff) {
	211	printf
	212	("Flash not erased at offset 0x%x Please erase to reprogram \n",
	213	ulOffset);
6cb142fa WD	214	return FLASH_FAIL;
	215	}
	216	unlock_flash(ulOffset);
3f0606ad	217	if (write_flash(ulOffset, (pnData[i] >> iShift)) < 0) {
6cb142fa WD	218	printf("Error programming the flash \n");
	219	return FLASH_FAIL;
	220	}
	221	iShift += 16;
	222	}
	223	}
	224	if (nLeftover > 0) {
	225	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	226	&& (ulOffset < INVALIDLOCNEND))
3f0606ad AL	227	return FLASH_FAIL;
6cb142fa	228	get_sector_number(ulOffset, &nSector);
3f0606ad AL	229	read_flash(ulOffset, &d);
	230	if (d != 0xffff) {
	231	printf
	232	("Flash already programmed. Please erase to reprogram \n");
	233	printf("uloffset = 0x%x \t d = 0x%x\n", ulOffset, d);
6cb142fa WD	234	return FLASH_FAIL;
	235	}
	236	unlock_flash(ulOffset);
3f0606ad	237	if (write_flash(ulOffset, pnData[i]) < 0) {
6cb142fa WD	238	printf("Error programming the flash \n");
	239	return FLASH_FAIL;
	240	}
	241	}
	242	return FLASH_SUCCESS;
	243	}
	244
	245	int read_data(long ulStart, long lCount, long lStride, int *pnData)
	246	{
	247	long i = 0;
	248	int j = 0;
	249	long ulOffset = ulStart;
	250	int iShift = 0;
	251	int iNumWords = 2;
	252	int nLeftover = lCount % 4;
	253	int nHi, nLow;
	254	int nSector = 0;
	255
	256	for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
	257	for (iShift = 0, j = 0; j < iNumWords; j += 2) {
	258	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	259	&& (ulOffset < INVALIDLOCNEND))
3f0606ad AL	260	return FLASH_FAIL;
6cb142fa WD	261
	262	get_sector_number(ulOffset, &nSector);
	263	read_flash(ulOffset, &nLow);
	264	ulOffset += (lStride * 2);
	265	read_flash(ulOffset, &nHi);
	266	ulOffset += (lStride * 2);
	267	pnData[i] = (nHi << 16) \| nLow;
	268	}
	269	}
	270	if (nLeftover > 0) {
	271	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	272	&& (ulOffset < INVALIDLOCNEND))
3f0606ad AL	273	return FLASH_FAIL;
6cb142fa WD	274
	275	get_sector_number(ulOffset, &nSector);
	276	read_flash(ulOffset, &pnData[i]);
	277	}
	278	return FLASH_SUCCESS;
	279	}
	280
	281	int write_flash(long nOffset, int nValue)
	282	{
	283	long addr;
	284
	285	addr = (CFG_FLASH_BASE + nOffset);
8440bb14	286	sync();
3f0606ad	287	(unsigned volatile short )addr = nValue;
8440bb14	288	sync();
3f0606ad	289	if (poll_toggle_bit(nOffset) < 0)
6cb142fa WD	290	return FLASH_FAIL;
	291	return FLASH_SUCCESS;
	292	}
	293
	294	int read_flash(long nOffset, int *pnValue)
	295	{
	296	int nValue = 0x0;
	297	long addr = (CFG_FLASH_BASE + nOffset);
	298
	299	if (nOffset != 0x2)
	300	reset_flash();
8440bb14	301	sync();
3f0606ad	302	nValue = (volatile unsigned short )addr;
8440bb14	303	sync();
6cb142fa WD	304	*pnValue = nValue;
	305	return TRUE;
	306	}
	307
	308	int poll_toggle_bit(long lOffset)
	309	{
3f0606ad	310	unsigned int u1, u2;
6cb142fa	311	unsigned long timeout = 0xFFFFFFFF;
3f0606ad AL	312	volatile unsigned long *FB =
	313	(volatile unsigned long *)(0x20000000 + lOffset);
	314	while (1) {
	315	if (timeout < 0)
6cb142fa WD	316	break;
	317	u1 = (volatile unsigned short )FB;
	318	u2 = (volatile unsigned short )FB;
3f0606ad	319	if ((u1 & 0x0040) == (u2 & 0x0040))
6cb142fa	320	return FLASH_SUCCESS;
3f0606ad	321	if ((u2 & 0x0020) == 0x0000)
6cb142fa WD	322	continue;
6cb142fa WD	323	u1 = (volatile unsigned short )FB;
3f0606ad	324	if ((u2 & 0x0040) == (u1 & 0x0040))
6cb142fa WD	325	return FLASH_SUCCESS;
	326	else {
	327	reset_flash();
	328	return FLASH_FAIL;
	329	}
	330	timeout--;
	331	}
	332	printf("Time out occured \n");
3f0606ad AL	333	if (timeout < 0)
3f0606ad AL	334	return FLASH_FAIL;
6cb142fa WD	335	}
	336
	337	void reset_flash(void)
	338	{
	339	write_flash(WRITESEQ1, RESET_VAL);
	340	/* Wait for 10 micro seconds */
	341	udelay(10);
	342	}
	343
	344	int erase_flash(void)
	345	{
	346	write_flash(WRITESEQ1, WRITEDATA1);
	347	write_flash(WRITESEQ2, WRITEDATA2);
	348	write_flash(WRITESEQ3, WRITEDATA3);
	349	write_flash(WRITESEQ4, WRITEDATA4);
	350	write_flash(WRITESEQ5, WRITEDATA5);
	351	write_flash(WRITESEQ6, WRITEDATA6);
	352
3f0606ad	353	if (poll_toggle_bit(0x0000) < 0)
6cb142fa WD	354	return FLASH_FAIL;
	355
	356	write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
	357	write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
	358	write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
	359	write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
	360	write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
	361	write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);
	362
3f0606ad	363	if (poll_toggle_bit(SecFlashASec1Off) < 0)
6cb142fa WD	364	return FLASH_FAIL;
	365
	366	write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
	367	write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
	368	write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
	369	write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
	370	write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
	371	write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);
	372
3f0606ad	373	if (poll_toggle_bit(PriFlashBOff) < 0)
6cb142fa WD	374	return FLASH_FAIL;
	375
	376	write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
	377	write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
	378	write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
	379	write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
	380	write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
	381	write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);
	382
3f0606ad	383	if (poll_toggle_bit(SecFlashBOff) < 0)
6cb142fa WD	384	return FLASH_FAIL;
	385
	386	return FLASH_SUCCESS;
	387	}
	388
	389	int erase_block_flash(int nBlock, unsigned long address)
	390	{
	391	long ulSectorOff = 0x0;
	392
	393	if ((nBlock < 0) \|\| (nBlock > AFP_NumSectors))
	394	return FALSE;
	395
	396	ulSectorOff = (address - CFG_FLASH_BASE);
	397
	398	write_flash((WRITESEQ1 \| ulSectorOff), WRITEDATA1);
	399	write_flash((WRITESEQ2 \| ulSectorOff), WRITEDATA2);
	400	write_flash((WRITESEQ3 \| ulSectorOff), WRITEDATA3);
	401	write_flash((WRITESEQ4 \| ulSectorOff), WRITEDATA4);
	402	write_flash((WRITESEQ5 \| ulSectorOff), WRITEDATA5);
	403
	404	write_flash(ulSectorOff, BlockEraseVal);
	405
3f0606ad	406	if (poll_toggle_bit(ulSectorOff) < 0)
6cb142fa WD	407	return FLASH_FAIL;
	408
	409	return FLASH_SUCCESS;
	410	}
	411
	412	void unlock_flash(long ulOffset)
	413	{
	414	unsigned long ulOffsetAddr = ulOffset;
	415	ulOffsetAddr &= 0xFFFF0000;
	416
	417	write_flash((WRITESEQ1 \| ulOffsetAddr), UNLOCKDATA1);
	418	write_flash((WRITESEQ2 \| ulOffsetAddr), UNLOCKDATA2);
	419	write_flash((WRITESEQ3 \| ulOffsetAddr), UNLOCKDATA3);
	420	}
	421
	422	int get_codes()
	423	{
	424	int dev_id = 0;
	425
	426	write_flash(WRITESEQ1, GETCODEDATA1);
	427	write_flash(WRITESEQ2, GETCODEDATA2);
	428	write_flash(WRITESEQ3, GETCODEDATA3);
	429
	430	read_flash(0x0002, &dev_id);
	431	dev_id &= 0x00FF;
	432
	433	reset_flash();
	434
	435	return dev_id;
	436	}
	437
	438	void get_sector_number(long ulOffset, int *pnSector)
	439	{
	440	int nSector = 0;
	441
	442	if (ulOffset >= SecFlashAOff) {
	443	if ((ulOffset < SecFlashASec1Off)
3f0606ad AL	444	&& (ulOffset < SecFlashASec2Off)) {
3f0606ad AL	445	nSector = SECT32;
6cb142fa	446	} else if ((ulOffset >= SecFlashASec2Off)
3f0606ad AL	447	&& (ulOffset < SecFlashASec3Off)) {
3f0606ad AL	448	nSector = SECT33;
6cb142fa	449	} else if ((ulOffset >= SecFlashASec3Off)
3f0606ad AL	450	&& (ulOffset < SecFlashASec4Off)) {
3f0606ad AL	451	nSector = SECT34;
6cb142fa	452	} else if ((ulOffset >= SecFlashASec4Off)
3f0606ad AL	453	&& (ulOffset < SecFlashAEndOff)) {
3f0606ad AL	454	nSector = SECT35;
6cb142fa WD	455	}
	456	} else if (ulOffset >= SecFlashBOff) {
	457	if ((ulOffset < SecFlashBSec1Off)
3f0606ad AL	458	&& (ulOffset < SecFlashBSec2Off)) {
3f0606ad AL	459	nSector = SECT36;
6cb142fa WD	460	}
6cb142fa WD	461	if ((ulOffset < SecFlashBSec2Off)
3f0606ad AL	462	&& (ulOffset < SecFlashBSec3Off)) {
3f0606ad AL	463	nSector = SECT37;
6cb142fa WD	464	}
6cb142fa WD	465	if ((ulOffset < SecFlashBSec3Off)
3f0606ad AL	466	&& (ulOffset < SecFlashBSec4Off)) {
3f0606ad AL	467	nSector = SECT38;
6cb142fa WD	468	}
6cb142fa WD	469	if ((ulOffset < SecFlashBSec4Off)
3f0606ad AL	470	&& (ulOffset < SecFlashBEndOff)) {
3f0606ad AL	471	nSector = SECT39;
6cb142fa WD	472	}
	473	} else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
	474	nSector = ulOffset & 0xffff0000;
	475	nSector = ulOffset >> 16;
	476	nSector = nSector & 0x000ff;
	477	}
	478
	479	if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
	480	*pnSector = nSector;
	481	}
	482	}