board/exbitgen/flash.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2003
  * 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
  */

 /*
  * Modified 4/5/2001
  * Wait for completion of each sector erase command issued
  * 4/5/2001
  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  */

 #include <common.h>
 #include <asm/u-boot.h>
 #include <asm/processor.h>
 #include <ppc4xx.h>

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

 /*-----------------------------------------------------------------------
  * Functions
  */
 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
 static int write_word (flash_info_t *info, ulong dest, ulong data);

 #ifdef MEIGSBOARD_ONBOARD_FLASH /* onboard = 2MB */
 #  ifdef CONFIG_EXBITGEN
 #     define FLASH_WORD_SIZE unsigned long
 #  endif
 #else /* Meigsboard socket flash = 512KB */
 #  ifdef CONFIG_EXBITGEN
 #    define FLASH_WORD_SIZE unsigned char
 #  endif
 #endif

 #ifdef CONFIG_EXBITGEN
 #define ADDR0           0x5555
 #define ADDR1           0x2aaa
 #define FLASH_WORD_SIZE unsigned char
 #endif

 /*-----------------------------------------------------------------------
  */

 unsigned long flash_init (void)
 {
 	unsigned long bank_size;
 	unsigned long tot_size;
 	unsigned long bank_addr;
 	int i;

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

 	tot_size = 0;

 	/* Detect Boot Flash */
 	bank_addr = CFG_FLASH0_BASE;
 	bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[0]);
 	if (bank_size > 0) {
 		(void)flash_protect(FLAG_PROTECT_CLEAR,
 			bank_addr,
 			bank_addr + bank_size - 1,
 			&flash_info[0]);
 	}
 	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 		printf ("## Unknown FLASH on Boot Flash Bank\n");
 	}
 	flash_info[0].size = bank_size;
 	tot_size += bank_size;

 	/* Detect Application Flash */
 	bank_addr = CFG_FLASH1_BASE;
 	for (i = 1; i < CFG_MAX_FLASH_BANKS; ++i) {
 		bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[i]);
 		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 			break;
 		}
 		if (bank_size > 0) {
 			(void)flash_protect(FLAG_PROTECT_CLEAR,
 				bank_addr,
 				bank_addr + bank_size - 1,
 				&flash_info[i]);
 		}
 		flash_info[i].size = bank_size;
 		tot_size += bank_size;
 		bank_addr += bank_size;
 	}
 	if (flash_info[1].flash_id == FLASH_UNKNOWN) {
 		printf ("## Unknown FLASH on Application Flash Bank\n");
 	}

 	/* Protect monitor and environment sectors */
 #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
 	flash_protect(FLAG_PROTECT_SET,
 		CFG_MONITOR_BASE,
 		CFG_MONITOR_BASE + monitor_flash_len - 1,
 		&flash_info[0]);
 #if 0xfffffffc >= CFG_FLASH0_BASE
 #if 0xfffffffc <= CFG_FLASH0_BASE + CFG_FLASH0_SIZE - 1
 	flash_protect(FLAG_PROTECT_SET,
 		0xfffffffc, 0xffffffff,
 		&flash_info[0]);
 #endif
 #endif
 #endif

 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 	flash_protect(FLAG_PROTECT_SET,
 		CONFIG_ENV_ADDR,
 		CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 		&flash_info[0]);
 #endif

 	return tot_size;
 }

 /*-----------------------------------------------------------------------
  */
 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;
 	case FLASH_MAN_SST:	printf ("SST ");		break;
 	default:		printf ("Unknown Vendor ");	break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_AM040:	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 				break;
 	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_AMDLV033C:	printf ("AM29LV033C (32 Mbit, uniform sector size)\n");
 				break;
 	case FLASH_AMDLV065D:	printf ("AM29LV065D (64 Mbit, uniform sector size)\n");
 				break;
 	case FLASH_SST800A:	printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 				break;
 	case FLASH_SST160A:	printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 				break;
 	case FLASH_SST040:	printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
 				break;
 	default:		printf ("Unknown Chip Type\n");
 				break;
 	}

 	printf ("  Size: %ld KB in %d Sectors\n",
 		info->size >> 10, 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");
 }

 /*-----------------------------------------------------------------------
  */


 /*-----------------------------------------------------------------------
  */

 /*
  * The following code cannot be run from FLASH!
  */
 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 {
 	short i;
 	FLASH_WORD_SIZE value;
 	ulong base = (ulong)addr;
 	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;

 	/* Write auto select command: read Manufacturer ID */
 	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;

 	value = addr2[0];

 	switch (value) {
 	case (FLASH_WORD_SIZE)AMD_MANUFACT:
 		info->flash_id = FLASH_MAN_AMD;
 		break;
 	case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	case (FLASH_WORD_SIZE)SST_MANUFACT:
 		info->flash_id = FLASH_MAN_SST;
 		break;
 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		return (0);			/* no or unknown flash	*/
 	}

 	value = addr2[1];			/* device ID		*/

 	switch (value) {
 	case (FLASH_WORD_SIZE)AMD_ID_F040B:
 		info->flash_id += FLASH_AM040;
 		info->sector_count = 8;
 		info->size = 0x0080000; /* => 512 ko */
 		break;
 	case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 		info->flash_id += FLASH_AM400T;
 		info->sector_count = 11;
 		info->size = 0x00080000;
 		break;				/* => 0.5 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 		info->flash_id += FLASH_AM400B;
 		info->sector_count = 11;
 		info->size = 0x00080000;
 		break;				/* => 0.5 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 		info->flash_id += FLASH_AM800T;
 		info->sector_count = 19;
 		info->size = 0x00100000;
 		break;				/* => 1 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 		info->flash_id += FLASH_AM800B;
 		info->sector_count = 19;
 		info->size = 0x00100000;
 		break;				/* => 1 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 		info->flash_id += FLASH_AM160T;
 		info->sector_count = 35;
 		info->size = 0x00200000;
 		break;				/* => 2 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 		info->flash_id += FLASH_AM160B;
 		info->sector_count = 35;
 		info->size = 0x00200000;
 		break;				/* => 2 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV033C:
 		info->flash_id += FLASH_AMDLV033C;
 		info->sector_count = 64;
 		info->size = 0x00400000;
 		break;				/* => 4 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV065D:
 		info->flash_id += FLASH_AMDLV065D;
 		info->sector_count = 128;
 		info->size = 0x00800000;
 		break;				/* => 8 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 		info->flash_id += FLASH_AM320T;
 		info->sector_count = 67;
 		info->size = 0x00400000;
 		break;				/* => 4 MB		*/

 	case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 		info->flash_id += FLASH_AM320B;
 		info->sector_count = 67;
 		info->size = 0x00400000;
 		break;				/* => 4 MB		*/

 	case (FLASH_WORD_SIZE)SST_ID_xF800A:
 		info->flash_id += FLASH_SST800A;
 		info->sector_count = 16;
 		info->size = 0x00100000;
 		break;				/* => 1 MB		*/

 	case (FLASH_WORD_SIZE)SST_ID_xF160A:
 		info->flash_id += FLASH_SST160A;
 		info->sector_count = 32;
 		info->size = 0x00200000;
 		break;				/* => 2 MB		*/
 	case (FLASH_WORD_SIZE)SST_ID_xF040:
 		info->flash_id += FLASH_SST040;
 		info->sector_count = 128;
 		info->size = 0x00080000;
 		break;				/* => 512KB		*/

 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		return (0);			/* => no or unknown flash */

 	}

 	/* set up sector start address table */
 	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 		(info->flash_id  == FLASH_AM040) ||
 		(info->flash_id == FLASH_AMDLV033C) ||
 		(info->flash_id == FLASH_AMDLV065D)) {
 		ulong sectsize = info->size / info->sector_count;
 		for (i = 0; i < info->sector_count; i++)
 			info->start[i] = base + (i * sectsize);
 	} else {
 	    if (info->flash_id & FLASH_BTYPE) {
 		/* set sector offsets for bottom boot block type	*/
 		info->start[0] = base + 0x00000000;
 		info->start[1] = base + 0x00004000;
 		info->start[2] = base + 0x00006000;
 		info->start[3] = base + 0x00008000;
 		for (i = 4; i < info->sector_count; i++) {
 			info->start[i] = base + (i * 0x00010000) - 0x00030000;
 		}
 	    } else {
 		/* set sector offsets for top boot block type		*/
 		i = info->sector_count - 1;
 		info->start[i--] = base + info->size - 0x00004000;
 		info->start[i--] = base + info->size - 0x00006000;
 		info->start[i--] = base + info->size - 0x00008000;
 		for (; i >= 0; i--) {
 			info->start[i] = base + i * 0x00010000;
 		}
 	    }
 	}

 	/* 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 */

 		addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 			info->protect[i] = 0;
 		else
 			info->protect[i] = addr2[2] & 1;
 	}

 	/* switch to the read mode */
 	if (info->flash_id != FLASH_UNKNOWN) {
 		addr2 = (FLASH_WORD_SIZE *)info->start[0];
 		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
 	}

 	return (info->size);
 }

 /*-----------------------------------------------------------------------
  */

 int flash_erase (flash_info_t *info, int s_first, int s_last)
 {
 	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 	volatile FLASH_WORD_SIZE *addr2;
 	int flag, prot, 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) {
 		printf ("Can't erase unknown flash type - aborted\n");
 		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");
 	}

 	start = get_timer (0);
 	last  = start;
 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);

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

 			addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 			addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 			addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 			addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 			addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 			addr2[0] = (FLASH_WORD_SIZE)0x00300030;

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

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

 			while ((addr2[0] & 0x00800080) !=
 				(FLASH_WORD_SIZE) 0x00800080) {
 				if ((now=get_timer(start)) >
 					   CFG_FLASH_ERASE_TOUT) {
 					printf ("Timeout\n");
 					addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
 					return 1;
 				}

 				/* show that we're waiting */
 				if ((now - last) > 1000) {  /* every second  */
 					putc ('.');
 					last = now;
 				}
 			}

 			addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
 		}
 	}

 	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)
 {
 	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 	volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 	ulong start;
 	int flag;
 	int i;

 	/* Check if Flash is (sufficiently) erased */
 	if ((*((volatile ulong *)dest) & data) != data) {
 		printf("dest = %08lx, *dest = %08lx, data = %08lx\n",
 			dest, *(volatile ulong *)dest, data);
 		return 2;
 	}

 	for (i=0; i < 4/sizeof(FLASH_WORD_SIZE); i++) {
 		/* Disable interrupts which might cause a timeout here */
 		flag = disable_interrupts();

 		addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 		addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 		addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 		dest2[i] = data2[i];

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

 		/* data polling for D7 */
 		start = get_timer (0);
 		while ((dest2[i] & 0x00800080) != (data2[i] & 0x00800080)) {
 			if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 				addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;
 				return (1);
 			}
 		}
 	}

 	addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;

 	return (0);
 }

 /*-----------------------------------------------------------------------
  */
	/*
	* (C) Copyright 2003
	* 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
	*/

	/*
	* Modified 4/5/2001
	* Wait for completion of each sector erase command issued
	* 4/5/2001
	* Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
	*/

	#include <common.h>
	#include <asm/u-boot.h>
	#include <asm/processor.h>
	#include <ppc4xx.h>

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

	/*-----------------------------------------------------------------------
	* Functions
	*/
	static ulong flash_get_size (vu_long addr, flash_info_t info);
	static int write_word (flash_info_t *info, ulong dest, ulong data);

	#ifdef MEIGSBOARD_ONBOARD_FLASH /* onboard = 2MB */
	# ifdef CONFIG_EXBITGEN
	# define FLASH_WORD_SIZE unsigned long
	# endif
	#else /* Meigsboard socket flash = 512KB */
	# ifdef CONFIG_EXBITGEN
	# define FLASH_WORD_SIZE unsigned char
	# endif
	#endif

	#ifdef CONFIG_EXBITGEN
	#define ADDR0 0x5555
	#define ADDR1 0x2aaa
	#define FLASH_WORD_SIZE unsigned char
	#endif

	/*-----------------------------------------------------------------------
	*/

	unsigned long flash_init (void)
	{
	unsigned long bank_size;
	unsigned long tot_size;
	unsigned long bank_addr;
	int i;

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

	tot_size = 0;

	/* Detect Boot Flash */
	bank_addr = CFG_FLASH0_BASE;
	bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[0]);
	if (bank_size > 0) {
	(void)flash_protect(FLAG_PROTECT_CLEAR,
	bank_addr,
	bank_addr + bank_size - 1,
	&flash_info[0]);
	}
	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	printf ("## Unknown FLASH on Boot Flash Bank\n");
	}
	flash_info[0].size = bank_size;
	tot_size += bank_size;

	/* Detect Application Flash */
	bank_addr = CFG_FLASH1_BASE;
	for (i = 1; i < CFG_MAX_FLASH_BANKS; ++i) {
	bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[i]);
	if (flash_info[i].flash_id == FLASH_UNKNOWN) {
	break;
	}
	if (bank_size > 0) {
	(void)flash_protect(FLAG_PROTECT_CLEAR,
	bank_addr,
	bank_addr + bank_size - 1,
	&flash_info[i]);
	}
	flash_info[i].size = bank_size;
	tot_size += bank_size;
	bank_addr += bank_size;
	}
	if (flash_info[1].flash_id == FLASH_UNKNOWN) {
	printf ("## Unknown FLASH on Application Flash Bank\n");
	}

	/* Protect monitor and environment sectors */
	#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
	flash_protect(FLAG_PROTECT_SET,
	CFG_MONITOR_BASE,
	CFG_MONITOR_BASE + monitor_flash_len - 1,
	&flash_info[0]);
	#if 0xfffffffc >= CFG_FLASH0_BASE
	#if 0xfffffffc <= CFG_FLASH0_BASE + CFG_FLASH0_SIZE - 1
	flash_protect(FLAG_PROTECT_SET,
	0xfffffffc, 0xffffffff,
	&flash_info[0]);
	#endif
	#endif
	#endif

	#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
	flash_protect(FLAG_PROTECT_SET,
	CONFIG_ENV_ADDR,
	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
	&flash_info[0]);
	#endif

	return tot_size;
	}

	/*-----------------------------------------------------------------------
	*/
	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;
	case FLASH_MAN_SST: printf ("SST "); break;
	default: printf ("Unknown Vendor "); break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040: printf ("AM29F040 (512 Kbit, uniform sector size)\n");
	break;
	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_AMDLV033C: printf ("AM29LV033C (32 Mbit, uniform sector size)\n");
	break;
	case FLASH_AMDLV065D: printf ("AM29LV065D (64 Mbit, uniform sector size)\n");
	break;
	case FLASH_SST800A: printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
	break;
	case FLASH_SST160A: printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
	break;
	case FLASH_SST040: printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
	break;
	default: printf ("Unknown Chip Type\n");
	break;
	}

	printf (" Size: %ld KB in %d Sectors\n",
	info->size >> 10, 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");
	}

	/*-----------------------------------------------------------------------
	*/


	/*-----------------------------------------------------------------------
	*/

	/*
	* The following code cannot be run from FLASH!
	*/
	static ulong flash_get_size (vu_long addr, flash_info_t info)
	{
	short i;
	FLASH_WORD_SIZE value;
	ulong base = (ulong)addr;
	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE )addr;

	/* Write auto select command: read Manufacturer ID */
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;

	value = addr2[0];

	switch (value) {
	case (FLASH_WORD_SIZE)AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	break;
	case (FLASH_WORD_SIZE)FUJ_MANUFACT:
	info->flash_id = FLASH_MAN_FUJ;
	break;
	case (FLASH_WORD_SIZE)SST_MANUFACT:
	info->flash_id = FLASH_MAN_SST;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0); /* no or unknown flash */
	}

	value = addr2[1]; /* device ID */

	switch (value) {
	case (FLASH_WORD_SIZE)AMD_ID_F040B:
	info->flash_id += FLASH_AM040;
	info->sector_count = 8;
	info->size = 0x0080000; /* => 512 ko */
	break;
	case (FLASH_WORD_SIZE)AMD_ID_LV400T:
	info->flash_id += FLASH_AM400T;
	info->sector_count = 11;
	info->size = 0x00080000;
	break; /* => 0.5 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV400B:
	info->flash_id += FLASH_AM400B;
	info->sector_count = 11;
	info->size = 0x00080000;
	break; /* => 0.5 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV800T:
	info->flash_id += FLASH_AM800T;
	info->sector_count = 19;
	info->size = 0x00100000;
	break; /* => 1 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV800B:
	info->flash_id += FLASH_AM800B;
	info->sector_count = 19;
	info->size = 0x00100000;
	break; /* => 1 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV160T:
	info->flash_id += FLASH_AM160T;
	info->sector_count = 35;
	info->size = 0x00200000;
	break; /* => 2 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV160B:
	info->flash_id += FLASH_AM160B;
	info->sector_count = 35;
	info->size = 0x00200000;
	break; /* => 2 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV033C:
	info->flash_id += FLASH_AMDLV033C;
	info->sector_count = 64;
	info->size = 0x00400000;
	break; /* => 4 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV065D:
	info->flash_id += FLASH_AMDLV065D;
	info->sector_count = 128;
	info->size = 0x00800000;
	break; /* => 8 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV320T:
	info->flash_id += FLASH_AM320T;
	info->sector_count = 67;
	info->size = 0x00400000;
	break; /* => 4 MB */

	case (FLASH_WORD_SIZE)AMD_ID_LV320B:
	info->flash_id += FLASH_AM320B;
	info->sector_count = 67;
	info->size = 0x00400000;
	break; /* => 4 MB */

	case (FLASH_WORD_SIZE)SST_ID_xF800A:
	info->flash_id += FLASH_SST800A;
	info->sector_count = 16;
	info->size = 0x00100000;
	break; /* => 1 MB */

	case (FLASH_WORD_SIZE)SST_ID_xF160A:
	info->flash_id += FLASH_SST160A;
	info->sector_count = 32;
	info->size = 0x00200000;
	break; /* => 2 MB */
	case (FLASH_WORD_SIZE)SST_ID_xF040:
	info->flash_id += FLASH_SST040;
	info->sector_count = 128;
	info->size = 0x00080000;
	break; /* => 512KB */

	default:
	info->flash_id = FLASH_UNKNOWN;
	return (0); /* => no or unknown flash */

	}

	/* set up sector start address table */
	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) \|\|
	(info->flash_id == FLASH_AM040) \|\|
	(info->flash_id == FLASH_AMDLV033C) \|\|
	(info->flash_id == FLASH_AMDLV065D)) {
	ulong sectsize = info->size / info->sector_count;
	for (i = 0; i < info->sector_count; i++)
	info->start[i] = base + (i * sectsize);
	} else {
	if (info->flash_id & FLASH_BTYPE) {
	/* set sector offsets for bottom boot block type */
	info->start[0] = base + 0x00000000;
	info->start[1] = base + 0x00004000;
	info->start[2] = base + 0x00006000;
	info->start[3] = base + 0x00008000;
	for (i = 4; i < info->sector_count; i++) {
	info->start[i] = base + (i * 0x00010000) - 0x00030000;
	}
	} else {
	/* set sector offsets for top boot block type */
	i = info->sector_count - 1;
	info->start[i--] = base + info->size - 0x00004000;
	info->start[i--] = base + info->size - 0x00006000;
	info->start[i--] = base + info->size - 0x00008000;
	for (; i >= 0; i--) {
	info->start[i] = base + i * 0x00010000;
	}
	}
	}

	/* 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 */

	addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
	info->protect[i] = 0;
	else
	info->protect[i] = addr2[2] & 1;
	}

	/* switch to the read mode */
	if (info->flash_id != FLASH_UNKNOWN) {
	addr2 = (FLASH_WORD_SIZE *)info->start[0];
	addr2 = (FLASH_WORD_SIZE)0x00F000F0; / reset bank */
	}

	return (info->size);
	}

	/*-----------------------------------------------------------------------
	*/

	int flash_erase (flash_info_t *info, int s_first, int s_last)
	{
	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE )(info->start[0]);
	volatile FLASH_WORD_SIZE *addr2;
	int flag, prot, 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) {
	printf ("Can't erase unknown flash type - aborted\n");
	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");
	}

	start = get_timer (0);
	last = start;
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);

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

	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	addr2[0] = (FLASH_WORD_SIZE)0x00300030;

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

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

	while ((addr2[0] & 0x00800080) !=
	(FLASH_WORD_SIZE) 0x00800080) {
	if ((now=get_timer(start)) >
	CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
	return 1;
	}

	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	putc ('.');
	last = now;
	}
	}

	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
	}
	}

	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)
	{
	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE )(info->start[0]);
	volatile FLASH_WORD_SIZE dest2 = (FLASH_WORD_SIZE )dest;
	volatile FLASH_WORD_SIZE data2 = (FLASH_WORD_SIZE )&data;
	ulong start;
	int flag;
	int i;

	/* Check if Flash is (sufficiently) erased */
	if ((((volatile ulong )dest) & data) != data) {
	printf("dest = %08lx, *dest = %08lx, data = %08lx\n",
	dest, (volatile ulong )dest, data);
	return 2;
	}

	for (i=0; i < 4/sizeof(FLASH_WORD_SIZE); i++) {
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
	dest2[i] = data2[i];

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

	/* data polling for D7 */
	start = get_timer (0);
	while ((dest2[i] & 0x00800080) != (data2[i] & 0x00800080)) {
	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
	addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;
	return (1);
	}
	}
	}

	addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;

	return (0);
	}

	/*-----------------------------------------------------------------------
	*/