board/bf537-stamp/flash.c - github/trini/u-boot - Gitiles

 /*
  * U-boot - flash.c Flash driver for PSD4256GV
  *
  * Copyright (c) 2005-2007 Analog Devices Inc.
  * 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., 51 Franklin St, Fifth Floor, Boston,
  * MA 02110-1301 USA
  */

 #include <malloc.h>
 #include <config.h>
 #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) {
 		FlagDev = 0;
 	}
 	info->flash_id = id;
 	switch (bank_flag) {
 	case 0:
 		for (i = PriFlashABegin; i < SecFlashABegin; i++)
 			info->start[i] = (baseaddr + (i * AFP_SectorSize1));
 		for (i = SecFlashABegin; i < NUM_SECTORS; i++)
 			info->start[i] =
 			    (baseaddr + SecFlashAOff +
 			     ((i - SecFlashABegin) * AFP_SectorSize2));
 		info->size = 0x400000;
 		info->sector_count = NUM_SECTORS;
 		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_b;
 	int i;

 	size_b = 0;
 	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 		flash_info[i].flash_id = FLASH_UNKNOWN;
 	}

 	size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);

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

 	/* flash_protect (int flag, ulong from, ulong to, flash_info_t *info) */
 	(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
 			    (flash_info[0].start[2] - 1), &flash_info[0]);
 #if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
 	(void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
 			    &flash_info[0]);
 #endif

 	return (size_b);
 }

 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 (STM_ID_29W320EB & 0xFFFF):
 	case (STM_ID_29W320DB & 0xFFFF):
 		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 (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
 	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) < 0) {
 				printf("Error Sector erasing \n");
 				return FLASH_FAIL;
 			}
 		}
 	}
 #elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
 	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) < 0) {
 					printf("Error Sector erasing \n");
 					return FLASH_FAIL;
 				}
 			}
 		}
 	}
 #endif
 	printf("\n");
 	return FLASH_SUCCESS;
 }

 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 {
 	int d;
 	if (addr % 2) {
 		read_flash(addr - 1 - CFG_FLASH_BASE, &d);
 		d = (int)((d & 0x00FF) | (*src++ << 8));
 		write_data(addr - 1, 2, (uchar *) & d);
 		write_data(addr + 1, cnt - 1, src);
 	} else
 		write_data(addr, cnt, src);
 	return FLASH_SUCCESS;
 }

 int write_data(long lStart, long lCount, uchar * pnData)
 {
 	long i = 0;
 	unsigned long ulOffset = lStart - CFG_FLASH_BASE;
 	int d;
 	int nSector = 0;
 	int flag = 0;

 	if (lCount % 2) {
 		flag = 1;
 		lCount = lCount - 1;
 	}

 	for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
 		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);
 		d = (int)(pnData[i] | pnData[i + 1] << 8);
 		write_flash(ulOffset, d);
 		if (poll_toggle_bit(ulOffset) < 0) {
 			printf("Error programming the flash \n");
 			return FLASH_FAIL;
 		}
 		if ((i > 0) && (!(i % AFP_SectorSize2)))
 			printf(".");
 	}
 	if (flag) {
 		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);
 		d = (int)(pnData[i] | (d & 0xFF00));
 		write_flash(ulOffset, d);
 		if (poll_toggle_bit(ulOffset) < 0) {
 			printf("Error programming the flash \n");
 			return FLASH_FAIL;
 		}
 	}
 	return FLASH_SUCCESS;
 }

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

 	addr = (CFG_FLASH_BASE + nOffset);
 	*(unsigned volatile short *)addr = nValue;
 	SSYNC();
 #if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
 	if (icache_status())
 		udelay(CONFIG_CCLK_HZ / 1000000);
 #endif
 	return FLASH_SUCCESS;
 }

 int read_flash(long nOffset, int *pnValue)
 {
 	unsigned short *pFlashAddr =
 	    (unsigned short *)(CFG_FLASH_BASE + nOffset);

 	*pnValue = *pFlashAddr;

 	return TRUE;
 }

 int poll_toggle_bit(long lOffset)
 {
 	unsigned int u1, u2;
 	volatile unsigned long *FB =
 	    (volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
 	while (1) {
 		u1 = *(volatile unsigned short *)FB;
 		u2 = *(volatile unsigned short *)FB;
 		u1 ^= u2;
 		if (!(u1 & 0x0040))
 			break;
 		if (!(u2 & 0x0020))
 			continue;
 		else {
 			u1 = *(volatile unsigned short *)FB;
 			u2 = *(volatile unsigned short *)FB;
 			u1 ^= u2;
 			if (!(u1 & 0x0040))
 				break;
 			else {
 				reset_flash();
 				return FLASH_FAIL;
 			}
 		}
 	}
 	return FLASH_SUCCESS;
 }

 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;

 	return FLASH_SUCCESS;
 }

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

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

 	/* figure out the offset of the block in flash */
 	if ((nBlock >= 0) && (nBlock < SecFlashABegin))
 		ulSectorOff = nBlock * AFP_SectorSize1;

 	else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
 		ulSectorOff =
 		    SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
 	/* no such sector */
 	else
 		return FLASH_FAIL;

 	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;
 	printf(".");

 	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(0x0402, &dev_id);
 	dev_id &= 0x0000FFFF;

 	reset_flash();

 	return dev_id;
 }

 void get_sector_number(long ulOffset, int *pnSector)
 {
 	int nSector = 0;
 	long lMainEnd = 0x400000;
 	long lBootEnd = 0x10000;

 	/* sector numbers for the FLASH A boot sectors */
 	if (ulOffset < lBootEnd) {
 		nSector = (int)ulOffset / AFP_SectorSize1;
 	}
 	/* sector numbers for the FLASH B boot sectors */
 	else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
 		nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
 	}
 	/* if it is a valid sector, set it */
 	if ((nSector >= 0) && (nSector < AFP_NumSectors))
 		*pnSector = nSector;

 }
	/*
	* U-boot - flash.c Flash driver for PSD4256GV
	*
	* Copyright (c) 2005-2007 Analog Devices Inc.
	* 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., 51 Franklin St, Fifth Floor, Boston,
	* MA 02110-1301 USA
	*/

	#include <malloc.h>
	#include <config.h>
	#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) {
	FlagDev = 0;
	}
	info->flash_id = id;
	switch (bank_flag) {
	case 0:
	for (i = PriFlashABegin; i < SecFlashABegin; i++)
	info->start[i] = (baseaddr + (i * AFP_SectorSize1));
	for (i = SecFlashABegin; i < NUM_SECTORS; i++)
	info->start[i] =
	(baseaddr + SecFlashAOff +
	((i - SecFlashABegin) * AFP_SectorSize2));
	info->size = 0x400000;
	info->sector_count = NUM_SECTORS;
	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_b;
	int i;

	size_b = 0;
	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);

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

	/* flash_protect (int flag, ulong from, ulong to, flash_info_t info) /
	(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
	(flash_info[0].start[2] - 1), &flash_info[0]);
	#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
	(void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
	&flash_info[0]);
	#endif

	return (size_b);
	}

	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 (STM_ID_29W320EB & 0xFFFF):
	case (STM_ID_29W320DB & 0xFFFF):
	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 (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
	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) < 0) {
	printf("Error Sector erasing \n");
	return FLASH_FAIL;
	}
	}
	}
	#elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
	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) < 0) {
	printf("Error Sector erasing \n");
	return FLASH_FAIL;
	}
	}
	}
	}
	#endif
	printf("\n");
	return FLASH_SUCCESS;
	}

	int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	{
	int d;
	if (addr % 2) {
	read_flash(addr - 1 - CFG_FLASH_BASE, &d);
	d = (int)((d & 0x00FF) \| (*src++ << 8));
	write_data(addr - 1, 2, (uchar *) & d);
	write_data(addr + 1, cnt - 1, src);
	} else
	write_data(addr, cnt, src);
	return FLASH_SUCCESS;
	}

	int write_data(long lStart, long lCount, uchar * pnData)
	{
	long i = 0;
	unsigned long ulOffset = lStart - CFG_FLASH_BASE;
	int d;
	int nSector = 0;
	int flag = 0;

	if (lCount % 2) {
	flag = 1;
	lCount = lCount - 1;
	}

	for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
	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);
	d = (int)(pnData[i] \| pnData[i + 1] << 8);
	write_flash(ulOffset, d);
	if (poll_toggle_bit(ulOffset) < 0) {
	printf("Error programming the flash \n");
	return FLASH_FAIL;
	}
	if ((i > 0) && (!(i % AFP_SectorSize2)))
	printf(".");
	}
	if (flag) {
	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);
	d = (int)(pnData[i] \| (d & 0xFF00));
	write_flash(ulOffset, d);
	if (poll_toggle_bit(ulOffset) < 0) {
	printf("Error programming the flash \n");
	return FLASH_FAIL;
	}
	}
	return FLASH_SUCCESS;
	}

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

	addr = (CFG_FLASH_BASE + nOffset);
	(unsigned volatile short )addr = nValue;
	SSYNC();
	#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
	if (icache_status())
	udelay(CONFIG_CCLK_HZ / 1000000);
	#endif
	return FLASH_SUCCESS;
	}

	int read_flash(long nOffset, int *pnValue)
	{
	unsigned short *pFlashAddr =
	(unsigned short *)(CFG_FLASH_BASE + nOffset);

	pnValue = pFlashAddr;

	return TRUE;
	}

	int poll_toggle_bit(long lOffset)
	{
	unsigned int u1, u2;
	volatile unsigned long *FB =
	(volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
	while (1) {
	u1 = (volatile unsigned short )FB;
	u2 = (volatile unsigned short )FB;
	u1 ^= u2;
	if (!(u1 & 0x0040))
	break;
	if (!(u2 & 0x0020))
	continue;
	else {
	u1 = (volatile unsigned short )FB;
	u2 = (volatile unsigned short )FB;
	u1 ^= u2;
	if (!(u1 & 0x0040))
	break;
	else {
	reset_flash();
	return FLASH_FAIL;
	}
	}
	}
	return FLASH_SUCCESS;
	}

	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;

	return FLASH_SUCCESS;
	}

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

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

	/* figure out the offset of the block in flash */
	if ((nBlock >= 0) && (nBlock < SecFlashABegin))
	ulSectorOff = nBlock * AFP_SectorSize1;

	else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
	ulSectorOff =
	SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
	/* no such sector */
	else
	return FLASH_FAIL;

	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;
	printf(".");

	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(0x0402, &dev_id);
	dev_id &= 0x0000FFFF;

	reset_flash();

	return dev_id;
	}

	void get_sector_number(long ulOffset, int *pnSector)
	{
	int nSector = 0;
	long lMainEnd = 0x400000;
	long lBootEnd = 0x10000;

	/* sector numbers for the FLASH A boot sectors */
	if (ulOffset < lBootEnd) {
	nSector = (int)ulOffset / AFP_SectorSize1;
	}
	/* sector numbers for the FLASH B boot sectors */
	else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
	nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
	}
	/* if it is a valid sector, set it */
	if ((nSector >= 0) && (nSector < AFP_NumSectors))
	*pnSector = nSector;

	}