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

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

int AFP_NumSectors = 40;
long AFP_SectorSize1 = 0x10000;
int AFP_SectorSize2 = 0x4000;

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", CONFIG_SYS_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 < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0], 0);
	size_b1 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[1], 1);
	size_b2 = flash_get_size(CONFIG_SYS_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, CONFIG_SYS_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;
	int d;
	if (addr % 2) {
		read_flash(addr - 1 - CONFIG_SYS_FLASH_BASE, &d);
		d = (int)((d & 0x00FF) | (*src++ << 8));
		ret = write_data(addr - 1, 2, (uchar *) & d);
		if (ret == FLASH_FAIL)
			return ERR_NOT_ERASED;
		ret = write_data(addr + 1, cnt - 1, src);
	} else
		ret = write_data(addr, cnt, src);
	if (ret == FLASH_FAIL)
		return ERR_NOT_ERASED;
	return FLASH_SUCCESS;
}

int write_data(long lStart, long lCount, uchar * pnData)
{
	long i = 0;
	unsigned long ulOffset = lStart - CONFIG_SYS_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 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 = (CONFIG_SYS_FLASH_BASE + nOffset);
	SSYNC();
	*(unsigned volatile short *)addr = nValue;
	SSYNC();
	if (poll_toggle_bit(nOffset) < 0)
		return FLASH_FAIL;
	return FLASH_SUCCESS;
}

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

	if (nOffset != 0x2)
		reset_flash();
	SSYNC();
	nValue = *(volatile unsigned short *)addr;
	SSYNC();
	*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 - CONFIG_SYS_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	*
dfeeab2c	4	* Copyright (c) 2005-2007 Analog Devices Inc.
6cb142fa WD	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
dfeeab2c AL	25	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
dfeeab2c AL	26	* MA 02110-1301 USA
6cb142fa WD	27	*/
6cb142fa WD	28
8440bb14	29	#include <asm/io.h>
6cb142fa WD	30	#include "flash-defines.h"
6cb142fa WD	31
65ba1abd MF	32	int AFP_NumSectors = 40;
	33	long AFP_SectorSize1 = 0x10000;
	34	int AFP_SectorSize2 = 0x4000;
	35
6cb142fa WD	36	void flash_reset(void)
	37	{
	38	reset_flash();
	39	}
	40
3f0606ad	41	unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
6cb142fa WD	42	{
	43	int id = 0, i = 0;
	44	static int FlagDev = 1;
	45
	46	id = get_codes();
3f0606ad	47	if (FlagDev) {
6cb142fa WD	48	#ifdef DEBUG
	49	printf("Device ID of the Flash is %x\n", id);
	50	#endif
	51	FlagDev = 0;
	52	}
	53	info->flash_id = id;
	54
	55	switch (bank_flag) {
	56	case 0:
	57	for (i = PriFlashABegin; i < SecFlashABegin; i++)
	58	info->start[i] = (baseaddr + (i * AFP_SectorSize1));
	59	info->size = 0x200000;
	60	info->sector_count = 32;
	61	break;
	62	case 1:
	63	info->start[0] = baseaddr + SecFlashASec1Off;
	64	info->start[1] = baseaddr + SecFlashASec2Off;
	65	info->start[2] = baseaddr + SecFlashASec3Off;
	66	info->start[3] = baseaddr + SecFlashASec4Off;
	67	info->size = 0x10000;
	68	info->sector_count = 4;
	69	break;
	70	case 2:
	71	info->start[0] = baseaddr + SecFlashBSec1Off;
	72	info->start[1] = baseaddr + SecFlashBSec2Off;
	73	info->start[2] = baseaddr + SecFlashBSec3Off;
	74	info->start[3] = baseaddr + SecFlashBSec4Off;
	75	info->size = 0x10000;
	76	info->sector_count = 4;
	77	break;
	78	}
	79	return (info->size);
	80	}
	81
	82	unsigned long flash_init(void)
	83	{
	84	unsigned long size_b0, size_b1, size_b2;
	85	int i;
	86
	87	size_b0 = size_b1 = size_b2 = 0;
	88	#ifdef DEBUG
6d0f6bcf	89	printf("Flash Memory Start 0x%x\n", CONFIG_SYS_FLASH_BASE);
6cb142fa WD	90	printf("Memory Map for the Flash\n");
	91	printf("0x20000000 - 0x200FFFFF Flash A Primary (1MB)\n");
	92	printf("0x20100000 - 0x201FFFFF Flash B Primary (1MB)\n");
	93	printf("0x20200000 - 0x2020FFFF Flash A Secondary (64KB)\n");
	94	printf("0x20280000 - 0x2028FFFF Flash B Secondary (64KB)\n");
	95	printf("Please type command flinfo for information on Sectors \n");
	96	#endif
6d0f6bcf	97	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
6cb142fa WD	98	flash_info[i].flash_id = FLASH_UNKNOWN;
	99	}
	100
6d0f6bcf JCPV	101	size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0], 0);
	102	size_b1 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[1], 1);
	103	size_b2 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[2], 2);
6cb142fa WD	104
	105	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size_b0 == 0) {
	106	printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
3f0606ad	107	size_b0, size_b0 >> 20);
6cb142fa WD	108	}
6cb142fa WD	109
6d0f6bcf	110	(void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_FLASH0_BASE,
3f0606ad	111	(flash_info[0].start[2] - 1), &flash_info[0]);
6cb142fa WD	112
	113	return (size_b0 + size_b1 + size_b2);
	114	}
	115
	116	void flash_print_info(flash_info_t * info)
	117	{
	118	int i;
	119
	120	if (info->flash_id == FLASH_UNKNOWN) {
	121	printf("missing or unknown FLASH type\n");
	122	return;
	123	}
	124
	125	switch (info->flash_id) {
	126	case FLASH_PSD4256GV:
	127	printf("ST Microelectronics ");
	128	break;
	129	default:
3f0606ad	130	printf("Unknown Vendor: (0x%08X) ", info->flash_id);
6cb142fa WD	131	break;
	132	}
	133	for (i = 0; i < info->sector_count; ++i) {
	134	if ((i % 5) == 0)
	135	printf("\n ");
	136	printf(" %08lX%s",
3f0606ad	137	info->start[i], info->protect[i] ? " (RO)" : " ");
6cb142fa WD	138	}
	139	printf("\n");
	140	return;
	141	}
	142
	143	int flash_erase(flash_info_t * info, int s_first, int s_last)
	144	{
3f0606ad AL	145	int cnt = 0, i;
3f0606ad AL	146	int prot, sect;
6cb142fa WD	147
6cb142fa WD	148	prot = 0;
8e7b703a WD	149	for (sect = s_first; sect <= s_last; ++sect) {
	150	if (info->protect[sect])
	151	prot++;
	152	}
6cb142fa WD	153
6cb142fa WD	154	if (prot)
3f0606ad AL	155	printf("- Warning: %d protected sectors will not be erased!\n",
3f0606ad AL	156	prot);
8e7b703a	157	else
3f0606ad	158	printf("\n");
6cb142fa WD	159
	160	cnt = s_last - s_first + 1;
	161
	162	if (cnt == FLASH_TOT_SECT) {
	163	printf("Erasing flash, Please Wait \n");
3f0606ad	164	if (erase_flash() < 0) {
6cb142fa WD	165	printf("Erasing flash failed \n");
	166	return FLASH_FAIL;
	167	}
	168	} else {
	169	printf("Erasing Flash locations, Please Wait\n");
	170	for (i = s_first; i <= s_last; i++) {
	171	if (info->protect[i] == 0) { /* not protected */
3f0606ad	172	if (erase_block_flash(i, info->start[i]) < 0) {
6cb142fa WD	173	printf("Error Sector erasing \n");
	174	return FLASH_FAIL;
	175	}
	176	}
	177	}
	178	}
	179	return FLASH_SUCCESS;
	180	}
	181
	182	int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	183	{
	184	int ret;
dfeeab2c AL	185	int d;
dfeeab2c AL	186	if (addr % 2) {
6d0f6bcf	187	read_flash(addr - 1 - CONFIG_SYS_FLASH_BASE, &d);
dfeeab2c AL	188	d = (int)((d & 0x00FF) \| (*src++ << 8));
	189	ret = write_data(addr - 1, 2, (uchar *) & d);
	190	if (ret == FLASH_FAIL)
	191	return ERR_NOT_ERASED;
	192	ret = write_data(addr + 1, cnt - 1, src);
	193	} else
	194	ret = write_data(addr, cnt, src);
3f0606ad	195	if (ret == FLASH_FAIL)
6cb142fa WD	196	return ERR_NOT_ERASED;
	197	return FLASH_SUCCESS;
	198	}
	199
dfeeab2c	200	int write_data(long lStart, long lCount, uchar * pnData)
6cb142fa WD	201	{
6cb142fa WD	202	long i = 0;
6d0f6bcf	203	unsigned long ulOffset = lStart - CONFIG_SYS_FLASH_BASE;
6cb142fa	204	int d;
6cb142fa	205	int nSector = 0;
dfeeab2c	206	int flag = 0;
6cb142fa	207
dfeeab2c AL	208	if (lCount % 2) {
	209	flag = 1;
	210	lCount = lCount - 1;
6cb142fa	211	}
dfeeab2c AL	212
	213	for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
	214	get_sector_number(ulOffset, &nSector);
	215	read_flash(ulOffset, &d);
	216	if (d != 0xffff) {
	217	printf
	218	("Flash not erased at offset 0x%x Please erase to reprogram \n",
	219	ulOffset);
3f0606ad	220	return FLASH_FAIL;
dfeeab2c AL	221	}
	222	unlock_flash(ulOffset);
	223	d = (int)(pnData[i] \| pnData[i + 1] << 8);
	224	write_flash(ulOffset, d);
	225	if (poll_toggle_bit(ulOffset) < 0) {
	226	printf("Error programming the flash \n");
	227	return FLASH_FAIL;
	228	}
	229	if ((i > 0) && (!(i % AFP_SectorSize2)))
	230	printf(".");
	231	}
	232	if (flag) {
6cb142fa	233	get_sector_number(ulOffset, &nSector);
3f0606ad AL	234	read_flash(ulOffset, &d);
	235	if (d != 0xffff) {
	236	printf
dfeeab2c AL	237	("Flash not erased at offset 0x%x Please erase to reprogram \n",
dfeeab2c AL	238	ulOffset);
6cb142fa WD	239	return FLASH_FAIL;
	240	}
	241	unlock_flash(ulOffset);
dfeeab2c AL	242	d = (int)(pnData[i] \| (d & 0xFF00));
	243	write_flash(ulOffset, d);
	244	if (poll_toggle_bit(ulOffset) < 0) {
6cb142fa WD	245	printf("Error programming the flash \n");
	246	return FLASH_FAIL;
	247	}
	248	}
	249	return FLASH_SUCCESS;
	250	}
	251
	252	int read_data(long ulStart, long lCount, long lStride, int *pnData)
	253	{
	254	long i = 0;
	255	int j = 0;
	256	long ulOffset = ulStart;
	257	int iShift = 0;
	258	int iNumWords = 2;
	259	int nLeftover = lCount % 4;
	260	int nHi, nLow;
	261	int nSector = 0;
	262
	263	for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
	264	for (iShift = 0, j = 0; j < iNumWords; j += 2) {
	265	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	266	&& (ulOffset < INVALIDLOCNEND))
3f0606ad AL	267	return FLASH_FAIL;
6cb142fa WD	268
	269	get_sector_number(ulOffset, &nSector);
	270	read_flash(ulOffset, &nLow);
	271	ulOffset += (lStride * 2);
	272	read_flash(ulOffset, &nHi);
	273	ulOffset += (lStride * 2);
	274	pnData[i] = (nHi << 16) \| nLow;
	275	}
	276	}
	277	if (nLeftover > 0) {
	278	if ((ulOffset >= INVALIDLOCNSTART)
3f0606ad AL	279	&& (ulOffset < INVALIDLOCNEND))
3f0606ad AL	280	return FLASH_FAIL;
6cb142fa WD	281
	282	get_sector_number(ulOffset, &nSector);
	283	read_flash(ulOffset, &pnData[i]);
	284	}
	285	return FLASH_SUCCESS;
	286	}
	287
	288	int write_flash(long nOffset, int nValue)
	289	{
	290	long addr;
	291
6d0f6bcf	292	addr = (CONFIG_SYS_FLASH_BASE + nOffset);
d4d77308	293	SSYNC();
3f0606ad	294	(unsigned volatile short )addr = nValue;
d4d77308	295	SSYNC();
3f0606ad	296	if (poll_toggle_bit(nOffset) < 0)
6cb142fa WD	297	return FLASH_FAIL;
	298	return FLASH_SUCCESS;
	299	}
	300
	301	int read_flash(long nOffset, int *pnValue)
	302	{
	303	int nValue = 0x0;
6d0f6bcf	304	long addr = (CONFIG_SYS_FLASH_BASE + nOffset);
6cb142fa WD	305
	306	if (nOffset != 0x2)
	307	reset_flash();
d4d77308	308	SSYNC();
3f0606ad	309	nValue = (volatile unsigned short )addr;
d4d77308	310	SSYNC();
6cb142fa WD	311	*pnValue = nValue;
	312	return TRUE;
	313	}
	314
	315	int poll_toggle_bit(long lOffset)
	316	{
3f0606ad	317	unsigned int u1, u2;
6cb142fa	318	unsigned long timeout = 0xFFFFFFFF;
3f0606ad AL	319	volatile unsigned long *FB =
	320	(volatile unsigned long *)(0x20000000 + lOffset);
	321	while (1) {
	322	if (timeout < 0)
6cb142fa WD	323	break;
	324	u1 = (volatile unsigned short )FB;
	325	u2 = (volatile unsigned short )FB;
3f0606ad	326	if ((u1 & 0x0040) == (u2 & 0x0040))
6cb142fa	327	return FLASH_SUCCESS;
3f0606ad	328	if ((u2 & 0x0020) == 0x0000)
6cb142fa WD	329	continue;
6cb142fa WD	330	u1 = (volatile unsigned short )FB;
3f0606ad	331	if ((u2 & 0x0040) == (u1 & 0x0040))
6cb142fa WD	332	return FLASH_SUCCESS;
	333	else {
	334	reset_flash();
	335	return FLASH_FAIL;
	336	}
	337	timeout--;
	338	}
	339	printf("Time out occured \n");
3f0606ad AL	340	if (timeout < 0)
3f0606ad AL	341	return FLASH_FAIL;
6cb142fa WD	342	}
	343
	344	void reset_flash(void)
	345	{
	346	write_flash(WRITESEQ1, RESET_VAL);
	347	/* Wait for 10 micro seconds */
	348	udelay(10);
	349	}
	350
	351	int erase_flash(void)
	352	{
	353	write_flash(WRITESEQ1, WRITEDATA1);
	354	write_flash(WRITESEQ2, WRITEDATA2);
	355	write_flash(WRITESEQ3, WRITEDATA3);
	356	write_flash(WRITESEQ4, WRITEDATA4);
	357	write_flash(WRITESEQ5, WRITEDATA5);
	358	write_flash(WRITESEQ6, WRITEDATA6);
	359
3f0606ad	360	if (poll_toggle_bit(0x0000) < 0)
6cb142fa WD	361	return FLASH_FAIL;
	362
	363	write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
	364	write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
	365	write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
	366	write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
	367	write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
	368	write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);
	369
3f0606ad	370	if (poll_toggle_bit(SecFlashASec1Off) < 0)
6cb142fa WD	371	return FLASH_FAIL;
	372
	373	write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
	374	write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
	375	write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
	376	write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
	377	write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
	378	write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);
	379
3f0606ad	380	if (poll_toggle_bit(PriFlashBOff) < 0)
6cb142fa WD	381	return FLASH_FAIL;
	382
	383	write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
	384	write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
	385	write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
	386	write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
	387	write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
	388	write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);
	389
3f0606ad	390	if (poll_toggle_bit(SecFlashBOff) < 0)
6cb142fa WD	391	return FLASH_FAIL;
	392
	393	return FLASH_SUCCESS;
	394	}
	395
	396	int erase_block_flash(int nBlock, unsigned long address)
	397	{
	398	long ulSectorOff = 0x0;
	399
	400	if ((nBlock < 0) \|\| (nBlock > AFP_NumSectors))
	401	return FALSE;
	402
6d0f6bcf	403	ulSectorOff = (address - CONFIG_SYS_FLASH_BASE);
6cb142fa WD	404
	405	write_flash((WRITESEQ1 \| ulSectorOff), WRITEDATA1);
	406	write_flash((WRITESEQ2 \| ulSectorOff), WRITEDATA2);
	407	write_flash((WRITESEQ3 \| ulSectorOff), WRITEDATA3);
	408	write_flash((WRITESEQ4 \| ulSectorOff), WRITEDATA4);
	409	write_flash((WRITESEQ5 \| ulSectorOff), WRITEDATA5);
	410
	411	write_flash(ulSectorOff, BlockEraseVal);
	412
3f0606ad	413	if (poll_toggle_bit(ulSectorOff) < 0)
6cb142fa WD	414	return FLASH_FAIL;
	415
	416	return FLASH_SUCCESS;
	417	}
	418
	419	void unlock_flash(long ulOffset)
	420	{
	421	unsigned long ulOffsetAddr = ulOffset;
	422	ulOffsetAddr &= 0xFFFF0000;
	423
	424	write_flash((WRITESEQ1 \| ulOffsetAddr), UNLOCKDATA1);
	425	write_flash((WRITESEQ2 \| ulOffsetAddr), UNLOCKDATA2);
	426	write_flash((WRITESEQ3 \| ulOffsetAddr), UNLOCKDATA3);
	427	}
	428
	429	int get_codes()
	430	{
	431	int dev_id = 0;
	432
	433	write_flash(WRITESEQ1, GETCODEDATA1);
	434	write_flash(WRITESEQ2, GETCODEDATA2);
	435	write_flash(WRITESEQ3, GETCODEDATA3);
	436
	437	read_flash(0x0002, &dev_id);
	438	dev_id &= 0x00FF;
	439
	440	reset_flash();
	441
	442	return dev_id;
	443	}
	444
	445	void get_sector_number(long ulOffset, int *pnSector)
	446	{
	447	int nSector = 0;
	448
	449	if (ulOffset >= SecFlashAOff) {
	450	if ((ulOffset < SecFlashASec1Off)
3f0606ad AL	451	&& (ulOffset < SecFlashASec2Off)) {
3f0606ad AL	452	nSector = SECT32;
6cb142fa	453	} else if ((ulOffset >= SecFlashASec2Off)
3f0606ad AL	454	&& (ulOffset < SecFlashASec3Off)) {
3f0606ad AL	455	nSector = SECT33;
6cb142fa	456	} else if ((ulOffset >= SecFlashASec3Off)
3f0606ad AL	457	&& (ulOffset < SecFlashASec4Off)) {
3f0606ad AL	458	nSector = SECT34;
6cb142fa	459	} else if ((ulOffset >= SecFlashASec4Off)
3f0606ad AL	460	&& (ulOffset < SecFlashAEndOff)) {
3f0606ad AL	461	nSector = SECT35;
6cb142fa WD	462	}
	463	} else if (ulOffset >= SecFlashBOff) {
	464	if ((ulOffset < SecFlashBSec1Off)
3f0606ad AL	465	&& (ulOffset < SecFlashBSec2Off)) {
3f0606ad AL	466	nSector = SECT36;
6cb142fa WD	467	}
6cb142fa WD	468	if ((ulOffset < SecFlashBSec2Off)
3f0606ad AL	469	&& (ulOffset < SecFlashBSec3Off)) {
3f0606ad AL	470	nSector = SECT37;
6cb142fa WD	471	}
6cb142fa WD	472	if ((ulOffset < SecFlashBSec3Off)
3f0606ad AL	473	&& (ulOffset < SecFlashBSec4Off)) {
3f0606ad AL	474	nSector = SECT38;
6cb142fa WD	475	}
6cb142fa WD	476	if ((ulOffset < SecFlashBSec4Off)
3f0606ad AL	477	&& (ulOffset < SecFlashBEndOff)) {
3f0606ad AL	478	nSector = SECT39;
6cb142fa WD	479	}
	480	} else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
	481	nSector = ulOffset & 0xffff0000;
	482	nSector = ulOffset >> 16;
	483	nSector = nSector & 0x000ff;
	484	}
	485
	486	if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
	487	*pnSector = nSector;
	488	}
	489	}