board/RPXlite_dw/flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 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
  */

 /*
  * Yoo. Jonghoon, IPone, yooth@ipone.co.kr
  * U-Boot port on RPXlite board
  *
  * Some of flash control words are modified. (from 2x16bit device
  * to 4x8bit device)
  * RPXLite board I tested has only 4 AM29LV800BB devices. Other devices
  * are not tested.
  *
  * (?) Does an RPXLite board which
  *	does not use AM29LV800 flash memory exist ?
  *	I don't know...
  */

 /* Yes,Yoo.They do use other FLASH for the board.
  *
  * Sam Song, IEMC. SHU, samsongshu@yahoo.com.cn
  * U-Boot port on RPXlite DW version board
  *
  * By now,it uses 4 AM29DL323DB90VI devices(4x8bit).
  * The total FLASH has 16MB(4x4MB).
  * I just made some necessary changes on the basis of Wolfgang and Yoo's job.
  *
  * June 8, 2004 */

 #include <common.h>
 #include <mpc8xx.h>

 flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/

 /*-----------------------------------------------------------------------
  * Functions   vu_long : volatile unsigned long IN include/common.h
  */
 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
 static int write_word (flash_info_t *info, ulong dest, ulong data);
 static void flash_get_offsets (ulong base, flash_info_t *info);

 unsigned long flash_init (void)
 {
 	unsigned long size_b0 ;
 	int i;

 	/* Init: no FLASHes known */
 	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 		flash_info[i].flash_id = FLASH_UNKNOWN;
 	}

 	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
 	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 	/* If Monitor is in the cope of FLASH,then
 	 * protect this area by default in case for
 	 * other occupation. [SAM] */

 	/* monitor protection ON by default */
 	flash_protect(FLAG_PROTECT_SET,
 		      CFG_MONITOR_BASE,
 		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
 		      &flash_info[0]);
 #endif
 	flash_info[0].size = size_b0;
 	return (size_b0);
 }

 static void flash_get_offsets (ulong base, flash_info_t *info)
 {
 	int i;

 	/* set up sector start address table */
 	if (info->flash_id & FLASH_BTYPE) {
 		info->start[0] = base + 0x00000000;
 		info->start[1] = base + 0x00008000;
 		info->start[2] = base + 0x00010000;
 		info->start[3] = base + 0x00018000;
 		info->start[4] = base + 0x00020000;
 		info->start[5] = base + 0x00028000;
 		info->start[6] = base + 0x00030000;
 		info->start[7] = base + 0x00038000;

 		for (i = 8; i < info->sector_count; i++) {
 			info->start[i] = base + ((i-7) * 0x00040000);
 		}
 	} else {
 		i = info->sector_count - 1;
 		info->start[i--] = base + info->size - 0x00010000;
 		info->start[i--] = base + info->size - 0x00018000;
 		info->start[i--] = base + info->size - 0x00020000;
 		for (; i >= 0; i--) {
 			info->start[i] = base + i * 0x00040000;
 		}
 	}

 }

 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 & FLASH_VENDMASK) {
 	case FLASH_MAN_AMD:	printf ("AMD ");		break;
 	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
 	default:		printf ("Unknown Vendor ");	break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 				break;
 	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 				break;
 	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 				break;
 	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 				break;
 	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 				break;
 	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 				break;
 	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 				break;
 	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 				break;
 	case FLASH_AMDL323B:    printf ("AM29DL323B (32 Mbit, bottom boot sector)\n");
 				break;
 	/* I just add the FLASH_AMDL323B for RPXlite_DW BOARD. [SAM]  */
 	default:		printf ("Unknown Chip Type\n");
 				break;
 	}
 	printf ("  Size: %ld MB in %d Sectors\n",info->size >> 20, info->sector_count);
 	printf ("  Sector Start Addresses:");
 	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;
 }

 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 {
 	short i;
 	ulong value;
 	ulong base = (ulong)addr;

 	/* Write auto select command: read Manufacturer ID */
 	addr[0xAAA] = 0x00AA00AA ;
 	addr[0x555] = 0x00550055 ;
 	addr[0xAAA] = 0x00900090 ;

 	value = addr[0] ;
 	switch (value & 0x00FF00FF) {
 	case AMD_MANUFACT:			/* AMD_MANUFACT =0x00010001 in flash.h */
 		info->flash_id = FLASH_MAN_AMD; /* FLASH_MAN_AMD=0x00000000 in flash.h */
 		break;
 	case FUJ_MANUFACT:
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		return (0);			/* no or unknown flash	*/
 	}

 	value = addr[2] ;			/* device ID		*/
 	switch (value & 0x00FF00FF) {
 	case (AMD_ID_LV400T & 0x00FF00FF):
 		info->flash_id += FLASH_AM400T;
 		info->sector_count = 11;
 		info->size = 0x00100000;
 		break;				/* => 1 MB		*/
 	case (AMD_ID_LV400B & 0x00FF00FF):
 		info->flash_id += FLASH_AM400B;
 		info->sector_count = 11;
 		info->size = 0x00100000;
 		break;				/* => 1 MB		*/
 	case (AMD_ID_LV800T & 0x00FF00FF):
 		info->flash_id += FLASH_AM800T;
 		info->sector_count = 19;
 		info->size = 0x00200000;
 		break;				/* => 2 MB		*/
 	case (AMD_ID_LV800B & 0x00FF00FF):
 		info->flash_id += FLASH_AM800B;
 		info->sector_count = 19;
 		info->size = 0x00400000;	/* Size doubled by yooth */
 		break;				/* => 4 MB		 */
 	case (AMD_ID_LV160T & 0x00FF00FF):
 		info->flash_id += FLASH_AM160T;
 		info->sector_count = 35;
 		info->size = 0x00400000;
 		break;				/* => 4 MB		*/
 	case (AMD_ID_LV160B & 0x00FF00FF):
 		info->flash_id += FLASH_AM160B;
 		info->sector_count = 35;
 		info->size = 0x00400000;
 		break;				/* => 4 MB		*/
 	case (AMD_ID_DL323B & 0x00FF00FF):
 		info->flash_id += FLASH_AMDL323B;
 		info->sector_count = 71;
 		info->size = 0x01000000;
 		break;                          /* => 16 MB(4x4MB)  */
 	/* AMD_ID_DL323B= 0x22532253  FLASH_AMDL323B= 0x0013
 	 * AMD_ID_DL323B could be found in <flash.h>.[SAM]
 	 * So we could get : flash_id = 0x00000013.
 	 * The first four-bit represents VEDOR ID,leaving others for FLASH ID. */
 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		return (0);			/* => no or unknown flash */

 	}
 	/* set up sector start address table */
 	if (info->flash_id & FLASH_BTYPE) {
 	/* FLASH_BTYPE=0x0001 mask for bottom boot sector type.If the last bit equals 1,
 	 * it means bottom boot flash. GOOD IDEA! [SAM]
 	 */

 	/* set sector offsets for bottom boot block type        */
 		info->start[0] = base + 0x00000000;
 		info->start[1] = base + 0x00008000;
 		info->start[2] = base + 0x00010000;
 		info->start[3] = base + 0x00018000;
 		info->start[4] = base + 0x00020000;
 		info->start[5] = base + 0x00028000;
 		info->start[6] = base + 0x00030000;
 		info->start[7] = base + 0x00038000;

 		for (i = 8; i < info->sector_count; i++) {
 			info->start[i] = base + ((i-7) * 0x00040000) ;
 		}
 	} else {
 		/* set sector offsets for top boot block type		*/
 		i = info->sector_count - 1;
 		info->start[i--] = base + info->size - 0x00010000;
 		info->start[i--] = base + info->size - 0x00018000;
 		info->start[i--] = base + info->size - 0x00020000;
 		for (; i >= 0; i--) {
 			info->start[i] = base + i * 0x00040000;
 		}
 	}

 	/* check for protected sectors */
 	for (i = 0; i < info->sector_count; i++) {
 		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
 		/* D0 = 1 if protected */
 		addr = (volatile unsigned long *)(info->start[i]);
 		/* info->protect[i] = addr[4] & 1 ; */
 		/* Mask it for disorder FLASH protection **[Sam]** */
 	}

 	/*
 	 * Prevent writes to uninitialized FLASH.
 	 */
 	if (info->flash_id != FLASH_UNKNOWN) {
 		addr = (volatile unsigned long *)info->start[0];

 		*addr = 0xF0F0F0F0;	/* reset bank */
 	}
 	return (info->size);
 }

 int	flash_erase (flash_info_t *info, int s_first, int s_last)
 {
 	vu_long *addr = (vu_long*)(info->start[0]);
 	int flag, prot, sect, l_sect;
 	ulong start, now, last;

 	if ((s_first < 0) || (s_first > s_last)) {
 		if (info->flash_id == FLASH_UNKNOWN) {
 			printf ("- missing\n");
 		} else {
 			printf ("- no sectors to erase\n");
 		}
 		return 1;
 	}

 	if ((info->flash_id == FLASH_UNKNOWN) ||
 	    (info->flash_id > FLASH_AMD_COMP)) {
 		printf ("Can't erase unknown flash type %08lx - aborted\n",
 			info->flash_id);
 		return 1;
 	}

 	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");
 	}

 	l_sect = -1;

 	/* Disable interrupts which might cause a timeout here */
 	flag = disable_interrupts();

 	addr[0xAAA] = 0xAAAAAAAA;
 	addr[0x555] = 0x55555555;
 	addr[0xAAA] = 0x80808080;
 	addr[0xAAA] = 0xAAAAAAAA;
 	addr[0x555] = 0x55555555;

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect<=s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			addr = (vu_long *)(info->start[sect]) ;
 			addr[0] = 0x30303030 ;
 			l_sect = sect;
 		}
 	}

 	/* re-enable interrupts if necessary */
 	if (flag)
 		enable_interrupts();

 	/* wait at least 80us - let's wait 1 ms */
 	udelay (1000);

 	/*
 	 * We wait for the last triggered sector
 	 */
 	if (l_sect < 0)
 		goto DONE;

 	start = get_timer (0);
 	last  = start;
 	addr = (vu_long *)(info->start[l_sect]);
 	while ((addr[0] & 0x80808080) != 0x80808080) {
 		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 			printf ("Timeout\n");
 			return 1;
 		}
 		/* show that we're waiting */
 		if ((now - last) > 1000) {	/* every second */
 			putc ('.');
 			last = now;
 		}
 	}

 DONE:
 	/* reset to read mode */
 	addr = (vu_long *)info->start[0];
 	addr[0] = 0xF0F0F0F0;	/* reset bank */

 	printf (" done\n");
 	return 0;
 }

 /*-----------------------------------------------------------------------
  * Copy memory to flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */

 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 {
 	ulong cp, wp, data;
 	int i, l, rc;

 	wp = (addr & ~3);	/* get lower word aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	if ((l = addr - wp) != 0) {
 		data = 0;
 		for (i=0, cp=wp; i<l; ++i, ++cp) {
 			data = (data << 8) | (*(uchar *)cp);
 		}
 		for (; i<4 && cnt>0; ++i) {
 			data = (data << 8) | *src++;
 			--cnt;
 			++cp;
 		}
 		for (; cnt==0 && i<4; ++i, ++cp) {
 			data = (data << 8) | (*(uchar *)cp);
 		}

 		if ((rc = write_word(info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 4;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 4) {
 		data = 0;
 		for (i=0; i<4; ++i) {
 			data = (data << 8) | *src++;
 		}
 		if ((rc = write_word(info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp  += 4;
 		cnt -= 4;
 	}

 	if (cnt == 0) {
 		return (0);
 	}

 	/*
 	 * handle unaligned tail bytes
 	 */
 	data = 0;
 	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 		data = (data << 8) | *src++;
 		--cnt;
 	}
 	for (; i<4; ++i, ++cp) {
 		data = (data << 8) | (*(uchar *)cp);
 	}
 	return (write_word(info, wp, data));
 }

 /*-----------------------------------------------------------------------
  * Write a word to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_word (flash_info_t *info, ulong dest, ulong data)
 {
 	vu_long *addr = (vu_long *)(info->start[0]);
 	ulong start;
 	int flag;

 	/* Check if Flash is (sufficiently) erased */
 	if ((*((vu_long *)dest) & data) != data) {
 		return (2);
 	}
 	/* Disable interrupts which might cause a timeout here */
 	flag = disable_interrupts();

 	addr[0xAAA] = 0xAAAAAAAA;
 	addr[0x555] = 0x55555555;
 	addr[0xAAA] = 0xA0A0A0A0;

 	*((vu_long *)dest) = data;

 	/* re-enable interrupts if necessary */
 	if (flag)
 		enable_interrupts();

 	/* data polling for D7 */
 	start = get_timer (0);
 	while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
 		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 			return (1);
 		}
 	}
 	return (0);
 }
	/*
	* (C) Copyright 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
	*/

	/*
	* Yoo. Jonghoon, IPone, yooth@ipone.co.kr
	* U-Boot port on RPXlite board
	*
	* Some of flash control words are modified. (from 2x16bit device
	* to 4x8bit device)
	* RPXLite board I tested has only 4 AM29LV800BB devices. Other devices
	* are not tested.
	*
	* (?) Does an RPXLite board which
	* does not use AM29LV800 flash memory exist ?
	* I don't know...
	*/

	/* Yes,Yoo.They do use other FLASH for the board.
	*
	* Sam Song, IEMC. SHU, samsongshu@yahoo.com.cn
	* U-Boot port on RPXlite DW version board
	*
	* By now,it uses 4 AM29DL323DB90VI devices(4x8bit).
	* The total FLASH has 16MB(4x4MB).
	* I just made some necessary changes on the basis of Wolfgang and Yoo's job.
	*
	* June 8, 2004 */

	#include <common.h>
	#include <mpc8xx.h>

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */

	/*-----------------------------------------------------------------------
	* Functions vu_long : volatile unsigned long IN include/common.h
	*/
	static ulong flash_get_size (vu_long addr, flash_info_t info);
	static int write_word (flash_info_t *info, ulong dest, ulong data);
	static void flash_get_offsets (ulong base, flash_info_t *info);

	unsigned long flash_init (void)
	{
	unsigned long size_b0 ;
	int i;

	/* Init: no FLASHes known */
	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* If Monitor is in the cope of FLASH,then
	* protect this area by default in case for
	* other occupation. [SAM] */

	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
	CFG_MONITOR_BASE,
	CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
	&flash_info[0]);
	#endif
	flash_info[0].size = size_b0;
	return (size_b0);
	}

	static void flash_get_offsets (ulong base, flash_info_t *info)
	{
	int i;

	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE) {
	info->start[0] = base + 0x00000000;
	info->start[1] = base + 0x00008000;
	info->start[2] = base + 0x00010000;
	info->start[3] = base + 0x00018000;
	info->start[4] = base + 0x00020000;
	info->start[5] = base + 0x00028000;
	info->start[6] = base + 0x00030000;
	info->start[7] = base + 0x00038000;

	for (i = 8; i < info->sector_count; i++) {
	info->start[i] = base + ((i-7) * 0x00040000);
	}
	} else {
	i = info->sector_count - 1;
	info->start[i--] = base + info->size - 0x00010000;
	info->start[i--] = base + info->size - 0x00018000;
	info->start[i--] = base + info->size - 0x00020000;
	for (; i >= 0; i--) {
	info->start[i] = base + i * 0x00040000;
	}
	}

	}

	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 & FLASH_VENDMASK) {
	case FLASH_MAN_AMD: printf ("AMD "); break;
	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	default: printf ("Unknown Vendor "); break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	break;
	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	break;
	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	break;
	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	break;
	case FLASH_AMDL323B: printf ("AM29DL323B (32 Mbit, bottom boot sector)\n");
	break;
	/* I just add the FLASH_AMDL323B for RPXlite_DW BOARD. [SAM] */
	default: printf ("Unknown Chip Type\n");
	break;
	}
	printf (" Size: %ld MB in %d Sectors\n",info->size >> 20, info->sector_count);
	printf (" Sector Start Addresses:");
	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;
	}

	static ulong flash_get_size (vu_long addr, flash_info_t info)
	{
	short i;
	ulong value;
	ulong base = (ulong)addr;

	/* Write auto select command: read Manufacturer ID */
	addr[0xAAA] = 0x00AA00AA ;
	addr[0x555] = 0x00550055 ;
	addr[0xAAA] = 0x00900090 ;

	value = addr[0] ;
	switch (value & 0x00FF00FF) {
	case AMD_MANUFACT: /* AMD_MANUFACT =0x00010001 in flash.h */
	info->flash_id = FLASH_MAN_AMD; /* FLASH_MAN_AMD=0x00000000 in flash.h */
	break;
	case FUJ_MANUFACT:
	info->flash_id = FLASH_MAN_FUJ;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0); /* no or unknown flash */
	}

	value = addr[2] ; /* device ID */
	switch (value & 0x00FF00FF) {
	case (AMD_ID_LV400T & 0x00FF00FF):
	info->flash_id += FLASH_AM400T;
	info->sector_count = 11;
	info->size = 0x00100000;
	break; /* => 1 MB */
	case (AMD_ID_LV400B & 0x00FF00FF):
	info->flash_id += FLASH_AM400B;
	info->sector_count = 11;
	info->size = 0x00100000;
	break; /* => 1 MB */
	case (AMD_ID_LV800T & 0x00FF00FF):
	info->flash_id += FLASH_AM800T;
	info->sector_count = 19;
	info->size = 0x00200000;
	break; /* => 2 MB */
	case (AMD_ID_LV800B & 0x00FF00FF):
	info->flash_id += FLASH_AM800B;
	info->sector_count = 19;
	info->size = 0x00400000; /* Size doubled by yooth */
	break; /* => 4 MB */
	case (AMD_ID_LV160T & 0x00FF00FF):
	info->flash_id += FLASH_AM160T;
	info->sector_count = 35;
	info->size = 0x00400000;
	break; /* => 4 MB */
	case (AMD_ID_LV160B & 0x00FF00FF):
	info->flash_id += FLASH_AM160B;
	info->sector_count = 35;
	info->size = 0x00400000;
	break; /* => 4 MB */
	case (AMD_ID_DL323B & 0x00FF00FF):
	info->flash_id += FLASH_AMDL323B;
	info->sector_count = 71;
	info->size = 0x01000000;
	break; /* => 16 MB(4x4MB) */
	/* AMD_ID_DL323B= 0x22532253 FLASH_AMDL323B= 0x0013
	* AMD_ID_DL323B could be found in <flash.h>.[SAM]
	* So we could get : flash_id = 0x00000013.
	* The first four-bit represents VEDOR ID,leaving others for FLASH ID. */
	default:
	info->flash_id = FLASH_UNKNOWN;
	return (0); /* => no or unknown flash */

	}
	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE) {
	/* FLASH_BTYPE=0x0001 mask for bottom boot sector type.If the last bit equals 1,
	* it means bottom boot flash. GOOD IDEA! [SAM]
	*/

	/* set sector offsets for bottom boot block type */
	info->start[0] = base + 0x00000000;
	info->start[1] = base + 0x00008000;
	info->start[2] = base + 0x00010000;
	info->start[3] = base + 0x00018000;
	info->start[4] = base + 0x00020000;
	info->start[5] = base + 0x00028000;
	info->start[6] = base + 0x00030000;
	info->start[7] = base + 0x00038000;

	for (i = 8; i < info->sector_count; i++) {
	info->start[i] = base + ((i-7) * 0x00040000) ;
	}
	} else {
	/* set sector offsets for top boot block type */
	i = info->sector_count - 1;
	info->start[i--] = base + info->size - 0x00010000;
	info->start[i--] = base + info->size - 0x00018000;
	info->start[i--] = base + info->size - 0x00020000;
	for (; i >= 0; i--) {
	info->start[i] = base + i * 0x00040000;
	}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	/* D0 = 1 if protected */
	addr = (volatile unsigned long *)(info->start[i]);
	/* info->protect[i] = addr[4] & 1 ; */
	/* Mask it for disorder FLASH protection [Sam] */
	}

	/*
	* Prevent writes to uninitialized FLASH.
	*/
	if (info->flash_id != FLASH_UNKNOWN) {
	addr = (volatile unsigned long *)info->start[0];

	addr = 0xF0F0F0F0; / reset bank */
	}
	return (info->size);
	}

	int flash_erase (flash_info_t *info, int s_first, int s_last)
	{
	vu_long addr = (vu_long)(info->start[0]);
	int flag, prot, sect, l_sect;
	ulong start, now, last;

	if ((s_first < 0) \|\| (s_first > s_last)) {
	if (info->flash_id == FLASH_UNKNOWN) {
	printf ("- missing\n");
	} else {
	printf ("- no sectors to erase\n");
	}
	return 1;
	}

	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	(info->flash_id > FLASH_AMD_COMP)) {
	printf ("Can't erase unknown flash type %08lx - aborted\n",
	info->flash_id);
	return 1;
	}

	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");
	}

	l_sect = -1;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;
	addr[0xAAA] = 0x80808080;
	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	addr = (vu_long *)(info->start[sect]) ;
	addr[0] = 0x30303030 ;
	l_sect = sect;
	}
	}

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay (1000);

	/*
	* We wait for the last triggered sector
	*/
	if (l_sect < 0)
	goto DONE;

	start = get_timer (0);
	last = start;
	addr = (vu_long *)(info->start[l_sect]);
	while ((addr[0] & 0x80808080) != 0x80808080) {
	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	return 1;
	}
	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	putc ('.');
	last = now;
	}
	}

	DONE:
	/* reset to read mode */
	addr = (vu_long *)info->start[0];
	addr[0] = 0xF0F0F0F0; /* reset bank */

	printf (" done\n");
	return 0;
	}

	/*-----------------------------------------------------------------------
	* Copy memory to flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/

	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3); /* get lower word aligned address */

	/*
	* handle unaligned start bytes
	*/
	if ((l = addr - wp) != 0) {
	data = 0;
	for (i=0, cp=wp; i<l; ++i, ++cp) {
	data = (data << 8) \| ((uchar )cp);
	}
	for (; i<4 && cnt>0; ++i) {
	data = (data << 8) \| *src++;
	--cnt;
	++cp;
	}
	for (; cnt==0 && i<4; ++i, ++cp) {
	data = (data << 8) \| ((uchar )cp);
	}

	if ((rc = write_word(info, wp, data)) != 0) {
	return (rc);
	}
	wp += 4;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 4) {
	data = 0;
	for (i=0; i<4; ++i) {
	data = (data << 8) \| *src++;
	}
	if ((rc = write_word(info, wp, data)) != 0) {
	return (rc);
	}
	wp += 4;
	cnt -= 4;
	}

	if (cnt == 0) {
	return (0);
	}

	/*
	* handle unaligned tail bytes
	*/
	data = 0;
	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	data = (data << 8) \| *src++;
	--cnt;
	}
	for (; i<4; ++i, ++cp) {
	data = (data << 8) \| ((uchar )cp);
	}
	return (write_word(info, wp, data));
	}

	/*-----------------------------------------------------------------------
	* Write a word to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_word (flash_info_t *info, ulong dest, ulong data)
	{
	vu_long addr = (vu_long )(info->start[0]);
	ulong start;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((((vu_long )dest) & data) != data) {
	return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;
	addr[0xAAA] = 0xA0A0A0A0;

	((vu_long )dest) = data;

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts();

	/* data polling for D7 */
	start = get_timer (0);
	while ((((vu_long )dest) & 0x80808080) != (data & 0x80808080)) {
	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	return (0);
	}