board/siemens/SCM/flash.c - uboot/qsr1000 - Git at Google

 /*
  * (C) Copyright 2001, 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * Flash Routines for AMD devices on the TQM8260 board
  *
  *--------------------------------------------------------------------
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

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

 #define V_ULONG(a)	(*(volatile unsigned long *)( a ))
 #define V_BYTE(a)	(*(volatile unsigned char *)( a ))


 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];


 /*-----------------------------------------------------------------------
  */
 void flash_reset (void)
 {
 	if (flash_info[0].flash_id != FLASH_UNKNOWN) {
 		V_ULONG (flash_info[0].start[0]) = 0x00F000F0;
 		V_ULONG (flash_info[0].start[0] + 4) = 0x00F000F0;
 	}
 }

 /*-----------------------------------------------------------------------
  */
 ulong flash_get_size (ulong baseaddr, flash_info_t * info)
 {
 	short i;
 	unsigned long flashtest_h, flashtest_l;

 	/* Write auto select command sequence and test FLASH answer */
 	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (baseaddr + ((ulong) 0x02AA << 3)) = 0x00550055;
 	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00900090;
 	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (baseaddr + 4 + ((ulong) 0x02AA << 3)) = 0x00550055;
 	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00900090;

 	flashtest_h = V_ULONG (baseaddr);	/* manufacturer ID     */
 	flashtest_l = V_ULONG (baseaddr + 4);

 	switch ((int) flashtest_h) {
 	case AMD_MANUFACT:
 		info->flash_id = FLASH_MAN_AMD;
 		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     */
 	}

 	flashtest_h = V_ULONG (baseaddr + 8);	/* device ID           */
 	flashtest_l = V_ULONG (baseaddr + 12);
 	if (flashtest_h != flashtest_l) {
 		info->flash_id = FLASH_UNKNOWN;
 	} else {
 		switch (flashtest_h) {
 		case AMD_ID_LV800T:
 			info->flash_id += FLASH_AM800T;
 			info->sector_count = 19;
 			info->size = 0x00400000;
 			break;			/* 4 * 1 MB = 4 MB  */
 		case AMD_ID_LV800B:
 			info->flash_id += FLASH_AM800B;
 			info->sector_count = 19;
 			info->size = 0x00400000;
 			break;			/* 4 * 1 MB = 4 MB  */
 		case AMD_ID_LV160T:
 			info->flash_id += FLASH_AM160T;
 			info->sector_count = 35;
 			info->size = 0x00800000;
 			break;			/* 4 * 2 MB = 8 MB  */
 		case AMD_ID_LV160B:
 			info->flash_id += FLASH_AM160B;
 			info->sector_count = 35;
 			info->size = 0x00800000;
 			break;			/* 4 * 2 MB = 8 MB  */
 		case AMD_ID_DL322T:
 			info->flash_id += FLASH_AMDL322T;
 			info->sector_count = 71;
 			info->size = 0x01000000;
 			break;			/* 4 * 4 MB = 16 MB */
 		case AMD_ID_DL322B:
 			info->flash_id += FLASH_AMDL322B;
 			info->sector_count = 71;
 			info->size = 0x01000000;
 			break;			/* 4 * 4 MB = 16 MB */
 		case AMD_ID_DL323T:
 			info->flash_id += FLASH_AMDL323T;
 			info->sector_count = 71;
 			info->size = 0x01000000;
 			break;			/* 4 * 4 MB = 16 MB */
 		case AMD_ID_DL323B:
 			info->flash_id += FLASH_AMDL323B;
 			info->sector_count = 71;
 			info->size = 0x01000000;
 			break;			/* 4 * 4 MB = 16 MB */
 		case AMD_ID_LV640U:
 			info->flash_id += FLASH_AM640U;
 			info->sector_count = 128;
 			info->size = 0x02000000;
 			break;			/* 4 * 8 MB = 32 MB */
 		default:
 			info->flash_id = FLASH_UNKNOWN;
 			return (0);		/* no or unknown flash     */
 		}
 	}

 	if (flashtest_h == AMD_ID_LV640U) {

 		/* set up sector start adress table (uniform sector type) */
 		for (i = 0; i < info->sector_count; i++)
 			info->start[i] = baseaddr + (i * 0x00040000);

 	} else if (info->flash_id & FLASH_BTYPE) {

 		/* set up sector start adress table (bottom sector type) */
 		info->start[0] = baseaddr + 0x00000000;
 		info->start[1] = baseaddr + 0x00010000;
 		info->start[2] = baseaddr + 0x00018000;
 		info->start[3] = baseaddr + 0x00020000;
 		for (i = 4; i < info->sector_count; i++) {
 			info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
 		}

 	} else {

 		/* set up sector start adress table (top sector type) */
 		i = info->sector_count - 1;
 		info->start[i--] = baseaddr + info->size - 0x00010000;
 		info->start[i--] = baseaddr + info->size - 0x00018000;
 		info->start[i--] = baseaddr + info->size - 0x00020000;
 		for (; i >= 0; i--) {
 			info->start[i] = baseaddr + i * 0x00040000;
 		}
 	}

 	/* check for protected sectors */
 	for (i = 0; i < info->sector_count; i++) {
 		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
 		if ((V_ULONG (info->start[i] + 16) & 0x00010001) ||
 			(V_ULONG (info->start[i] + 20) & 0x00010001)) {
 			info->protect[i] = 1;	/* D0 = 1 if protected */
 		} else {
 			info->protect[i] = 0;
 		}
 	}

 	flash_reset ();
 	return (info->size);
 }

 /*-----------------------------------------------------------------------
  */
 unsigned long flash_init (void)
 {
 	unsigned long size_b0 = 0;
 	int i;

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

 	/* Static FLASH Bank configuration here (only one bank) */

 	size_b0 = flash_get_size (CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
 	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);
 	}

 	/*
 	 * protect monitor and environment sectors
 	 */

 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
 	flash_protect (FLAG_PROTECT_SET,
 		       CONFIG_SYS_MONITOR_BASE,
 		       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
 #endif

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

 	return (size_b0);
 }

 /*-----------------------------------------------------------------------
  */
 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_AM800T:
 		printf ("29LV800T (8 M, top sector)\n");
 		break;
 	case FLASH_AM800B:
 		printf ("29LV800T (8 M, bottom sector)\n");
 		break;
 	case FLASH_AM160T:
 		printf ("29LV160T (16 M, top sector)\n");
 		break;
 	case FLASH_AM160B:
 		printf ("29LV160B (16 M, bottom sector)\n");
 		break;
 	case FLASH_AMDL322T:
 		printf ("29DL322T (32 M, top sector)\n");
 		break;
 	case FLASH_AMDL322B:
 		printf ("29DL322B (32 M, bottom sector)\n");
 		break;
 	case FLASH_AMDL323T:
 		printf ("29DL323T (32 M, top sector)\n");
 		break;
 	case FLASH_AMDL323B:
 		printf ("29DL323B (32 M, bottom sector)\n");
 		break;
 	case FLASH_AM640U:
 		printf ("29LV640D (64 M, uniform sector)\n");
 		break;
 	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;
 }

 /*-----------------------------------------------------------------------
  */
 int flash_erase (flash_info_t * info, int s_first, int s_last)
 {
 	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;
 	}

 	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 ();

 	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00800080;
 	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00800080;
 	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 	udelay (1000);

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			V_ULONG (info->start[sect]) = 0x00300030;
 			V_ULONG (info->start[sect] + 4) = 0x00300030;
 			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;
 	while ((V_ULONG (info->start[l_sect]) & 0x00800080) != 0x00800080 ||
 	       (V_ULONG (info->start[l_sect] + 4) & 0x00800080) != 0x00800080)
 	{
 		if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 			printf ("Timeout\n");
 			return 1;
 		}
 		/* show that we're waiting */
 		if ((now - last) > 1000) {	/* every second */
 			serial_putc ('.');
 			last = now;
 		}
 	}

   DONE:
 	/* reset to read mode */
 	flash_reset ();

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

 static int write_dword (flash_info_t *, ulong, unsigned char *);

 /*-----------------------------------------------------------------------
  * 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 dp;
 	static unsigned char bb[8];
 	int i, l, rc, cc = cnt;

 	dp = (addr & ~7);		/* get lower dword aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	if ((l = addr - dp) != 0) {
 		for (i = 0; i < 8; i++)
 			bb[i] = (i < l || (i - l) >= cc) ? V_BYTE (dp + i) : *src++;
 		if ((rc = write_dword (info, dp, bb)) != 0) {
 			return (rc);
 		}
 		dp += 8;
 		cc -= 8 - l;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cc >= 8) {
 		if ((rc = write_dword (info, dp, src)) != 0) {
 			return (rc);
 		}
 		dp += 8;
 		src += 8;
 		cc -= 8;
 	}

 	if (cc <= 0) {
 		return (0);
 	}

 	/*
 	 * handle unaligned tail bytes
 	 */
 	for (i = 0; i < 8; i++) {
 		bb[i] = (i < cc) ? *src++ : V_BYTE (dp + i);
 	}
 	return (write_dword (info, dp, bb));
 }

 /*-----------------------------------------------------------------------
  * Write a dword to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
 {
 	ulong start, cl, ch;
 	int flag, i;

 	for (ch = 0, i = 0; i < 4; i++)
 		ch = (ch << 8) + *pdata++;	/* high word    */
 	for (cl = 0, i = 0; i < 4; i++)
 		cl = (cl << 8) + *pdata++;	/* low word */

 	/* Check if Flash is (sufficiently) erased */
 	if ((*((vu_long *) dest) & ch) != ch
 		|| (*((vu_long *) (dest + 4)) & cl) != cl) {
 		return (2);
 	}

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

 	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
 	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00A000A0;
 	V_ULONG (dest) = ch;
 	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
 	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
 	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00A000A0;
 	V_ULONG (dest + 4) = cl;

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

 	/* data polling for D7 */
 	start = get_timer (0);
 	while (((V_ULONG (dest) & 0x00800080) != (ch & 0x00800080)) ||
 		   ((V_ULONG (dest + 4) & 0x00800080) != (cl & 0x00800080))) {
 		if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 			return (1);
 		}
 	}
 	return (0);
 }
	/*
	* (C) Copyright 2001, 2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* Flash Routines for AMD devices on the TQM8260 board
	*
	*--------------------------------------------------------------------
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

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

	#define V_ULONG(a) ((volatile unsigned long )( a ))
	#define V_BYTE(a) ((volatile unsigned char )( a ))


	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];


	/*-----------------------------------------------------------------------
	*/
	void flash_reset (void)
	{
	if (flash_info[0].flash_id != FLASH_UNKNOWN) {
	V_ULONG (flash_info[0].start[0]) = 0x00F000F0;
	V_ULONG (flash_info[0].start[0] + 4) = 0x00F000F0;
	}
	}

	/*-----------------------------------------------------------------------
	*/
	ulong flash_get_size (ulong baseaddr, flash_info_t * info)
	{
	short i;
	unsigned long flashtest_h, flashtest_l;

	/* Write auto select command sequence and test FLASH answer */
	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (baseaddr + ((ulong) 0x02AA << 3)) = 0x00550055;
	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00900090;
	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (baseaddr + 4 + ((ulong) 0x02AA << 3)) = 0x00550055;
	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00900090;

	flashtest_h = V_ULONG (baseaddr); /* manufacturer ID */
	flashtest_l = V_ULONG (baseaddr + 4);

	switch ((int) flashtest_h) {
	case AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	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 */
	}

	flashtest_h = V_ULONG (baseaddr + 8); /* device ID */
	flashtest_l = V_ULONG (baseaddr + 12);
	if (flashtest_h != flashtest_l) {
	info->flash_id = FLASH_UNKNOWN;
	} else {
	switch (flashtest_h) {
	case AMD_ID_LV800T:
	info->flash_id += FLASH_AM800T;
	info->sector_count = 19;
	info->size = 0x00400000;
	break; /* 4 * 1 MB = 4 MB */
	case AMD_ID_LV800B:
	info->flash_id += FLASH_AM800B;
	info->sector_count = 19;
	info->size = 0x00400000;
	break; /* 4 * 1 MB = 4 MB */
	case AMD_ID_LV160T:
	info->flash_id += FLASH_AM160T;
	info->sector_count = 35;
	info->size = 0x00800000;
	break; /* 4 * 2 MB = 8 MB */
	case AMD_ID_LV160B:
	info->flash_id += FLASH_AM160B;
	info->sector_count = 35;
	info->size = 0x00800000;
	break; /* 4 * 2 MB = 8 MB */
	case AMD_ID_DL322T:
	info->flash_id += FLASH_AMDL322T;
	info->sector_count = 71;
	info->size = 0x01000000;
	break; /* 4 * 4 MB = 16 MB */
	case AMD_ID_DL322B:
	info->flash_id += FLASH_AMDL322B;
	info->sector_count = 71;
	info->size = 0x01000000;
	break; /* 4 * 4 MB = 16 MB */
	case AMD_ID_DL323T:
	info->flash_id += FLASH_AMDL323T;
	info->sector_count = 71;
	info->size = 0x01000000;
	break; /* 4 * 4 MB = 16 MB */
	case AMD_ID_DL323B:
	info->flash_id += FLASH_AMDL323B;
	info->sector_count = 71;
	info->size = 0x01000000;
	break; /* 4 * 4 MB = 16 MB */
	case AMD_ID_LV640U:
	info->flash_id += FLASH_AM640U;
	info->sector_count = 128;
	info->size = 0x02000000;
	break; /* 4 * 8 MB = 32 MB */
	default:
	info->flash_id = FLASH_UNKNOWN;
	return (0); /* no or unknown flash */
	}
	}

	if (flashtest_h == AMD_ID_LV640U) {

	/* set up sector start adress table (uniform sector type) */
	for (i = 0; i < info->sector_count; i++)
	info->start[i] = baseaddr + (i * 0x00040000);

	} else if (info->flash_id & FLASH_BTYPE) {

	/* set up sector start adress table (bottom sector type) */
	info->start[0] = baseaddr + 0x00000000;
	info->start[1] = baseaddr + 0x00010000;
	info->start[2] = baseaddr + 0x00018000;
	info->start[3] = baseaddr + 0x00020000;
	for (i = 4; i < info->sector_count; i++) {
	info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
	}

	} else {

	/* set up sector start adress table (top sector type) */
	i = info->sector_count - 1;
	info->start[i--] = baseaddr + info->size - 0x00010000;
	info->start[i--] = baseaddr + info->size - 0x00018000;
	info->start[i--] = baseaddr + info->size - 0x00020000;
	for (; i >= 0; i--) {
	info->start[i] = baseaddr + i * 0x00040000;
	}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	if ((V_ULONG (info->start[i] + 16) & 0x00010001) \|\|
	(V_ULONG (info->start[i] + 20) & 0x00010001)) {
	info->protect[i] = 1; /* D0 = 1 if protected */
	} else {
	info->protect[i] = 0;
	}
	}

	flash_reset ();
	return (info->size);
	}

	/*-----------------------------------------------------------------------
	*/
	unsigned long flash_init (void)
	{
	unsigned long size_b0 = 0;
	int i;

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

	/* Static FLASH Bank configuration here (only one bank) */

	size_b0 = flash_get_size (CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
	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);
	}

	/*
	* protect monitor and environment sectors
	*/

	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
	flash_protect (FLAG_PROTECT_SET,
	CONFIG_SYS_MONITOR_BASE,
	CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
	#endif

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

	return (size_b0);
	}

	/*-----------------------------------------------------------------------
	*/
	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_AM800T:
	printf ("29LV800T (8 M, top sector)\n");
	break;
	case FLASH_AM800B:
	printf ("29LV800T (8 M, bottom sector)\n");
	break;
	case FLASH_AM160T:
	printf ("29LV160T (16 M, top sector)\n");
	break;
	case FLASH_AM160B:
	printf ("29LV160B (16 M, bottom sector)\n");
	break;
	case FLASH_AMDL322T:
	printf ("29DL322T (32 M, top sector)\n");
	break;
	case FLASH_AMDL322B:
	printf ("29DL322B (32 M, bottom sector)\n");
	break;
	case FLASH_AMDL323T:
	printf ("29DL323T (32 M, top sector)\n");
	break;
	case FLASH_AMDL323B:
	printf ("29DL323B (32 M, bottom sector)\n");
	break;
	case FLASH_AM640U:
	printf ("29LV640D (64 M, uniform sector)\n");
	break;
	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;
	}

	/*-----------------------------------------------------------------------
	*/
	int flash_erase (flash_info_t * info, int s_first, int s_last)
	{
	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;
	}

	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 ();

	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00800080;
	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00800080;
	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
	udelay (1000);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	V_ULONG (info->start[sect]) = 0x00300030;
	V_ULONG (info->start[sect] + 4) = 0x00300030;
	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;
	while ((V_ULONG (info->start[l_sect]) & 0x00800080) != 0x00800080 \|\|
	(V_ULONG (info->start[l_sect] + 4) & 0x00800080) != 0x00800080)
	{
	if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	return 1;
	}
	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	serial_putc ('.');
	last = now;
	}
	}

	DONE:
	/* reset to read mode */
	flash_reset ();

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

	static int write_dword (flash_info_t , ulong, unsigned char );

	/*-----------------------------------------------------------------------
	* 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 dp;
	static unsigned char bb[8];
	int i, l, rc, cc = cnt;

	dp = (addr & ~7); /* get lower dword aligned address */

	/*
	* handle unaligned start bytes
	*/
	if ((l = addr - dp) != 0) {
	for (i = 0; i < 8; i++)
	bb[i] = (i < l \|\| (i - l) >= cc) ? V_BYTE (dp + i) : *src++;
	if ((rc = write_dword (info, dp, bb)) != 0) {
	return (rc);
	}
	dp += 8;
	cc -= 8 - l;
	}

	/*
	* handle word aligned part
	*/
	while (cc >= 8) {
	if ((rc = write_dword (info, dp, src)) != 0) {
	return (rc);
	}
	dp += 8;
	src += 8;
	cc -= 8;
	}

	if (cc <= 0) {
	return (0);
	}

	/*
	* handle unaligned tail bytes
	*/
	for (i = 0; i < 8; i++) {
	bb[i] = (i < cc) ? *src++ : V_BYTE (dp + i);
	}
	return (write_dword (info, dp, bb));
	}

	/*-----------------------------------------------------------------------
	* Write a dword to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
	{
	ulong start, cl, ch;
	int flag, i;

	for (ch = 0, i = 0; i < 4; i++)
	ch = (ch << 8) + pdata++; / high word */
	for (cl = 0, i = 0; i < 4; i++)
	cl = (cl << 8) + pdata++; / low word */

	/* Check if Flash is (sufficiently) erased */
	if ((((vu_long ) dest) & ch) != ch
	\|\| (((vu_long ) (dest + 4)) & cl) != cl) {
	return (2);
	}

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

	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00A000A0;
	V_ULONG (dest) = ch;
	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00A000A0;
	V_ULONG (dest + 4) = cl;

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

	/* data polling for D7 */
	start = get_timer (0);
	while (((V_ULONG (dest) & 0x00800080) != (ch & 0x00800080)) \|\|
	((V_ULONG (dest + 4) & 0x00800080) != (cl & 0x00800080))) {
	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	return (0);
	}