/*
 * (C) Copyright 2000
 * 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
 */

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

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

#ifdef CONFIG_FLASH_16BIT
#define FLASH_WORD_SIZE	unsigned short
#define	FLASH_ID_MASK	0xFFFF
#else
#define FLASH_WORD_SIZE unsigned long
#define	FLASH_ID_MASK	0xFFFFFFFF
#endif

/*-----------------------------------------------------------------------
 * Functions
 */

ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
#ifndef CONFIG_FLASH_16BIT
static int write_word (flash_info_t *info, ulong dest, ulong data);
#else
static int write_short (flash_info_t *info, ulong dest, ushort data);
#endif
/*int flash_write (uchar *, ulong, ulong); */
/*flash_info_t *addr2info (ulong);   */

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

/*-----------------------------------------------------------------------
 */
unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0, size_b1;
	int i;

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

	/* Static FLASH Bank configuration here - FIXME XXX */

	size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE0_PRELIM,
				 &flash_info[0]);
	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0<<20);
	}

	size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE1_PRELIM,
				 &flash_info[1]);

	if (size_b1 > size_b0) {
		printf ("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1<<20,
			size_b0, size_b0<<20
		);
		flash_info[0].flash_id	= FLASH_UNKNOWN;
		flash_info[1].flash_id	= FLASH_UNKNOWN;
		flash_info[0].sector_count	= -1;
		flash_info[1].sector_count	= -1;
		flash_info[0].size		= 0;
		flash_info[1].size		= 0;
		return (0);
	}

	/* Remap FLASH according to real size */
	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
	memctl->memc_br0 = CFG_FLASH_BASE | 0x00000801; /*  (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;*/

	/* Re-do sizing to get full correct info */

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

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* monitor protection ON by default */
	(void)flash_protect(FLAG_PROTECT_SET,
			    CFG_MONITOR_BASE,
			    CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
			    &flash_info[0]);
#endif

	if (size_b1) {
		memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
		memctl->memc_br1 = (CFG_FLASH_BASE | 0x00000801) + (size_b0 & BR_BA_MSK);
                              /*((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
				    BR_MS_GPCM | BR_V;*/

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)(CFG_FLASH_BASE + size_b0),
					  &flash_info[1]);

		flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
		/* monitor protection ON by default */
		(void)flash_protect(FLAG_PROTECT_SET,
				    CFG_MONITOR_BASE,
				    CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
				    &flash_info[1]);
#endif
	} else {
		memctl->memc_br1 = 0;		/* invalidate bank */

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
	}

	flash_info[0].size = size_b0;
	flash_info[1].size = size_b1;

	return (size_b0 + size_b1);
}

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

	/* set up sector start adress table */
	if (info->flash_id & FLASH_BTYPE) {
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CONFIG_FLASH_16BIT
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00004000;
		info->start[2] = base + 0x00008000;
		info->start[3] = base + 0x0000C000;
		info->start[4] = base + 0x00010000;
		info->start[5] = base + 0x00014000;
		info->start[6] = base + 0x00018000;
		info->start[7] = base + 0x0001C000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x000E0000;
	        }
               }
             else {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	       }
#else
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00002000;
		info->start[2] = base + 0x00004000;
		info->start[3] = base + 0x00006000;
		info->start[4] = base + 0x00008000;
		info->start[5] = base + 0x0000A000;
		info->start[6] = base + 0x0000C000;
		info->start[7] = base + 0x0000E000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00010000) - 0x00070000;
	        }
	       }
             else {
		/* 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;
		}
	       }
#endif
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CONFIG_FLASH_16BIT
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		info->start[i--] = base + info->size - 0x00014000;
		info->start[i--] = base + info->size - 0x00018000;
		info->start[i--] = base + info->size - 0x0001C000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}

               } else {

		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	       }
#else
		info->start[i--] = base + info->size - 0x00002000;
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00006000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000A000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x0000E000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00010000;
		}

               } else {

		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;
		}
	       }
#endif
	}


}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
	int i;
	uchar *boottype;
	uchar botboot[]=", bottom boot sect)\n";
	uchar topboot[]=", top boot sector)\n";

	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;
	case FLASH_MAN_STM:	printf ("STM ");		break;
	case FLASH_MAN_INTEL:	printf ("INTEL ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	if (info->flash_id & 0x0001 ) {
	boottype = botboot;
	} else {
	boottype = topboot;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit%s",boottype);
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit%s",boottype);
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit%s",boottype);
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit%s",boottype);
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit%s",boottype);
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit%s",boottype);
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit%s",boottype);
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit%s",boottype);
				break;
	case FLASH_INTEL800B:	printf ("INTEL28F800B (8 Mbit%s",boottype);
				break;
	case FLASH_INTEL800T:	printf ("INTEL28F800T (8 Mbit%s",boottype);
				break;
	case FLASH_INTEL160B:	printf ("INTEL28F160B (16 Mbit%s",boottype);
				break;
	case FLASH_INTEL160T:	printf ("INTEL28F160T (16 Mbit%s",boottype);
				break;
	case FLASH_INTEL320B:	printf ("INTEL28F320B (32 Mbit%s",boottype);
				break;
	case FLASH_INTEL320T:	printf ("INTEL28F320T (32 Mbit%s",boottype);
				break;

#if 0 /* enable when devices are available */

	case FLASH_INTEL640B:	printf ("INTEL28F640B (64 Mbit%s",boottype);
				break;
	case FLASH_INTEL640T:	printf ("INTEL28F640T (64 Mbit%s",boottype);
				break;
#endif

	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;
}

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


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

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

	/* Write auto select command: read Manufacturer ID */


#ifndef CONFIG_FLASH_16BIT

	/*
	 * Note: if it is an AMD flash and the word at addr[0000]
         * is 0x00890089 this routine will think it is an Intel
         * flash device and may(most likely) cause trouble.
	 */

	addr[0x0000] = 0x00900090;
	if(addr[0x0000] != 0x00890089){
		addr[0x0555] = 0x00AA00AA;
		addr[0x02AA] = 0x00550055;
		addr[0x0555] = 0x00900090;
#else

	/*
	 * Note: if it is an AMD flash and the word at addr[0000]
         * is 0x0089 this routine will think it is an Intel
         * flash device and may(most likely) cause trouble.
	 */

	addr[0x0000] = 0x0090;

	if(addr[0x0000] != 0x0089){
		addr[0x0555] = 0x00AA;
		addr[0x02AA] = 0x0055;
		addr[0x0555] = 0x0090;
#endif
	}
	value = addr[0];

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

	}

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

	switch (value) {

	case (AMD_ID_LV400T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV400B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV800T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (AMD_ID_LV800B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (AMD_ID_LV160T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (AMD_ID_LV160B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/
#if 0	/* enable when device IDs are available */
	case (AMD_ID_LV320T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case (AMD_ID_LV320B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/
#endif

	case (INTEL_ID_28F800B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL800T;
		info->sector_count = 23;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (INTEL_ID_28F800B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL800B;
		info->sector_count = 23;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (INTEL_ID_28F160B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL160T;
		info->sector_count = 39;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (INTEL_ID_28F160B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL160B;
		info->sector_count = 39;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL320T;
		info->sector_count = 71;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 71;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

#if 0 /* enable when devices are available */
	case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL320T;
		info->sector_count = 135;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/

	case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 135;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/
#endif
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}

	/* set up sector start adress table */
	if (info->flash_id & FLASH_BTYPE) {
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CONFIG_FLASH_16BIT
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00004000;
		info->start[2] = base + 0x00008000;
		info->start[3] = base + 0x0000C000;
		info->start[4] = base + 0x00010000;
		info->start[5] = base + 0x00014000;
		info->start[6] = base + 0x00018000;
		info->start[7] = base + 0x0001C000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x000E0000;
	        }
               }
             else {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	       }
#else
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00002000;
		info->start[2] = base + 0x00004000;
		info->start[3] = base + 0x00006000;
		info->start[4] = base + 0x00008000;
		info->start[5] = base + 0x0000A000;
		info->start[6] = base + 0x0000C000;
		info->start[7] = base + 0x0000E000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00010000) - 0x00070000;
	        }
	       }
             else {
		/* 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;
		}
	       }
#endif
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CONFIG_FLASH_16BIT
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		info->start[i--] = base + info->size - 0x00014000;
		info->start[i--] = base + info->size - 0x00018000;
		info->start[i--] = base + info->size - 0x0001C000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}

               } else {

		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	       }
#else
		info->start[i--] = base + info->size - 0x00002000;
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00006000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000A000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x0000E000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00010000;
		}

               } else {

		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;
		}
	       }
#endif
	}

	/* 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 FLASH_WORD_SIZE *)(info->start[i]);
		info->protect[i] = addr[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr = (volatile FLASH_WORD_SIZE *)info->start[0];
		if( (info->flash_id & 0xFF00) == FLASH_MAN_INTEL){
		   *addr = (0x00F000F0 & FLASH_ID_MASK);	/* reset bank */
		} else {
		   *addr = (0x00FF00FF & FLASH_ID_MASK);	/* reset bank */
		}
	}

	return (info->size);
}


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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{

	volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
	int flag, prot, sect, l_sect, barf;
	ulong start, now, last;
	int rcode = 0;

	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) &&
             ( (info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL ) ) ){
		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");
	}

	l_sect = -1;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();
    if(info->flash_id < FLASH_AMD_COMP) {
#ifndef CONFIG_FLASH_16BIT
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00800080;
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
#else
	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;
	addr[0x0555] = 0x0080;
	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;
#endif
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
			addr[0] = (0x00300030 & FLASH_ID_MASK);
			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 = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
	while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
			  (0x00800080&FLASH_ID_MASK)  )
	{
		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 */
			serial_putc ('.');
			last = now;
		}
	}

DONE:
	/* reset to read mode */
	addr = (volatile FLASH_WORD_SIZE *)info->start[0];
	addr[0] = (0x00F000F0 & FLASH_ID_MASK);	/* reset bank */
    } else {


	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			barf = 0;
#ifndef CONFIG_FLASH_16BIT
			addr = (vu_long*)(info->start[sect]);
			addr[0] = 0x00200020;
			addr[0] = 0x00D000D0;
			while(!(addr[0] & 0x00800080));	/* wait for error or finish */
			if( addr[0] & 0x003A003A) {	/* check for error */
				barf = addr[0] & 0x003A0000;
				if( barf ) {
					barf >>=16;
				} else {
					barf = addr[0] & 0x0000003A;
				}
			}
#else
			addr = (vu_short*)(info->start[sect]);
			addr[0] = 0x0020;
			addr[0] = 0x00D0;
			while(!(addr[0] & 0x0080));	/* wait for error or finish */
			if( addr[0] & 0x003A)	/* check for error */
				barf = addr[0] & 0x003A;
#endif
			if(barf) {
				printf("\nFlash error in sector at %lx\n",(unsigned long)addr);
				if(barf & 0x0002) printf("Block locked, not erased.\n");
				if((barf & 0x0030) == 0x0030)
					printf("Command Sequence error.\n");
				if((barf & 0x0030) == 0x0020)
					printf("Block Erase error.\n");
				if(barf & 0x0008) printf("Vpp Low error.\n");
				rcode = 1;
			} else printf(".");
			l_sect = sect;
		}
	addr = (volatile FLASH_WORD_SIZE *)info->start[0];
	addr[0] = (0x00FF00FF & FLASH_ID_MASK);	/* reset bank */

	}

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

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

/*-----------------------------------------------------------------------
 * 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)
{
#ifndef CONFIG_FLASH_16BIT
	ulong cp, wp, data;
	int l;
#else
	ulong cp, wp;
	ushort data;
#endif
	int i, rc;

#ifndef CONFIG_FLASH_16BIT


	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));

#else
	wp = (addr & ~1);	/* get lower word aligned address */

	/*
	 * handle unaligned start byte
	 */
	if (addr - wp) {
		data = 0;
		data = (data << 8) | *src++;
		--cnt;
		if ((rc = write_short(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 2;
	}

	/*
	 * handle word aligned part
	 */
/*	l = 0; used for debuging  */
	while (cnt >= 2) {
		data = 0;
		for (i=0; i<2; ++i) {
			data = (data << 8) | *src++;
		}

/*		if(!l){
			printf("%x",data);
			l = 1;
		}  used for debuging */

		if ((rc = write_short(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 2;
		cnt -= 2;
	}

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

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i<2; ++i, ++cp) {
		data = (data << 8) | (*(uchar *)cp);
	}

	return (write_short(info, wp, data));


#endif
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
#ifndef CONFIG_FLASH_16BIT
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
	vu_long *addr = (vu_long*)(info->start[0]);
	ulong start,barf;
	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();

     if(info->flash_id > FLASH_AMD_COMP) {
	/* AMD stuff */
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;
     } else {
	/* intel stuff */
	*addr = 0x00400040;
     }
	*((vu_long *)dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);

     if(info->flash_id > FLASH_AMD_COMP) {

	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}

     } else {

	while(!(addr[0] & 0x00800080)){  	/* wait for error or finish */
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
	}

	if( addr[0] & 0x003A003A) {	/* check for error */
		barf = addr[0] & 0x003A0000;
		if( barf ) {
			barf >>=16;
		} else {
		        barf = addr[0] & 0x0000003A;
		}
		printf("\nFlash write error at address %lx\n",(unsigned long)dest);
		if(barf & 0x0002) printf("Block locked, not erased.\n");
		if(barf & 0x0010) printf("Programming error.\n");
		if(barf & 0x0008) printf("Vpp Low error.\n");
	  	return(2);
	}


     }

	return (0);

}

#else

static int write_short (flash_info_t *info, ulong dest, ushort data)
{
	vu_short *addr = (vu_short*)(info->start[0]);
	ulong start,barf;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_short *)dest) & data) != data) {
		return (2);
	}

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

     if(info->flash_id < FLASH_AMD_COMP) {
	/* AMD stuff */
	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;
	addr[0x0555] = 0x00A0;
     } else {
	/* intel stuff */
        *addr = 0x00D0;
	*addr = 0x0040;
     }
	*((vu_short *)dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);

     if(info->flash_id < FLASH_AMD_COMP) {
          /* AMD stuff */
	while ((*((vu_short *)dest) & 0x0080) != (data & 0x0080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}

     } else {
	/* intel stuff */
	while(!(addr[0] & 0x0080)){  	/* wait for error or finish */
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) return (1);
	}

	if( addr[0] & 0x003A) {	/* check for error */
		barf = addr[0] & 0x003A;
		printf("\nFlash write error at address %lx\n",(unsigned long)dest);
		if(barf & 0x0002) printf("Block locked, not erased.\n");
		if(barf & 0x0010) printf("Programming error.\n");
		if(barf & 0x0008) printf("Vpp Low error.\n");
	  	return(2);
	}
	*addr = 0x00B0;
	*addr = 0x0070;
	while(!(addr[0] & 0x0080)){  	/* wait for error or finish */
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) return (1);
	}

	*addr = 0x00FF;

     }

	return (0);

}


#endif

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