board/tqm8xx/flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2000-2004
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #if 0
 #define DEBUG
 #endif

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

 #include <asm/processor.h>

 DECLARE_GLOBAL_DATA_PTR;

 #if !defined(CFG_FLASH_CFI_DRIVER) /* do not use if CFI driver is configured */

 #if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
     && !defined(CONFIG_TQM885D)
 # ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
 #  define CFG_OR_TIMING_FLASH_AT_50MHZ	(OR_ACS_DIV1  | OR_TRLX | OR_CSNT_SAM | \
 					 OR_SCY_2_CLK | OR_EHTR | OR_BI)
 # endif
 #endif /* CONFIG_TQM8xxL/M, !TQM866M, !TQM885D */

 #ifndef	CFG_ENV_ADDR
 #define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
 #endif

 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);

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

 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;

 #ifdef	CFG_OR_TIMING_FLASH_AT_50MHZ
 	int scy, trlx, flash_or_timing, clk_diff;

 	scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
 	if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
 		trlx = OR_TRLX;
 		scy *= 2;
 	} else
 		trlx = 0;

 		/* We assume that each 10MHz of bus clock require 1-clk SCY
 		 * adjustment.
 		 */
 	clk_diff = (gd->bus_clk / 1000000) - 50;

 		/* We need proper rounding here. This is what the "+5" and "-5"
 		 * are here for.
 		 */
 	if (clk_diff >= 0)
 		scy += (clk_diff + 5) / 10;
 	else
 		scy += (clk_diff - 5) / 10;

 		/* For bus frequencies above 50MHz, we want to use relaxed timing
 		 * (OR_TRLX).
 		 */
 	if (gd->bus_clk >= 50000000)
 		trlx = OR_TRLX;
 	else
 		trlx = 0;

 	if (trlx)
 		scy /= 2;

 	if (scy > 0xf)
 		scy = 0xf;
 	if (scy < 1)
 		scy = 1;

 	flash_or_timing = (scy << 4) | trlx |
 	                  (CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK));
 #endif
 	/* 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 */

 	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);

 	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);

 	debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);

 	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((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);

 	debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

 	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);
 	}

 	debug  ("## Before remap: "
 		"BR0: 0x%08x    OR0: 0x%08x    "
 		"BR1: 0x%08x    OR1: 0x%08x\n",
 		memctl->memc_br0, memctl->memc_or0,
 		memctl->memc_br1, memctl->memc_or1);

 	/* Remap FLASH according to real size */
 #ifndef	CFG_OR_TIMING_FLASH_AT_50MHZ
 	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
 #else
 	memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK);
 #endif
 	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;

 	debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
 		memctl->memc_br0, memctl->memc_or0);

 	/* Re-do sizing to get full correct info */
 	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);

 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 	/* monitor protection ON by default */
 	debug ("Protect monitor: %08lx ... %08lx\n",
 		(ulong)CFG_MONITOR_BASE,
 		(ulong)CFG_MONITOR_BASE + monitor_flash_len - 1);

 	flash_protect(FLAG_PROTECT_SET,
 		      CFG_MONITOR_BASE,
 		      CFG_MONITOR_BASE + monitor_flash_len - 1,
 		      &flash_info[0]);
 #endif

 #ifdef	CFG_ENV_IS_IN_FLASH
 	/* ENV protection ON by default */
 # ifdef CFG_ENV_ADDR_REDUND
 	debug ("Protect primary   environment: %08lx ... %08lx\n",
 		(ulong)CFG_ENV_ADDR,
 		(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 # else
 	debug ("Protect environment: %08lx ... %08lx\n",
 		(ulong)CFG_ENV_ADDR,
 		(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 # endif

 	flash_protect(FLAG_PROTECT_SET,
 		      CFG_ENV_ADDR,
 		      CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 		      &flash_info[0]);
 #endif

 #ifdef CFG_ENV_ADDR_REDUND
 	debug ("Protect redundand environment: %08lx ... %08lx\n",
 		(ulong)CFG_ENV_ADDR_REDUND,
 		(ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1);

 	flash_protect(FLAG_PROTECT_SET,
 		      CFG_ENV_ADDR_REDUND,
 		      CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
 		      &flash_info[0]);
 #endif

 	if (size_b1) {
 #ifndef	CFG_OR_TIMING_FLASH_AT_50MHZ
 		memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
 #else
 		memctl->memc_or1 = flash_or_timing | (-size_b1 & 0xFFFF8000);
 #endif
 		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
 				    BR_MS_GPCM | BR_V;

 		debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
 			memctl->memc_br1, memctl->memc_or1);

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

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

 #ifdef	CFG_ENV_IS_IN_FLASH
 		/* ENV protection ON by default */
 		flash_protect(FLAG_PROTECT_SET,
 			      CFG_ENV_ADDR,
 			      CFG_ENV_ADDR+CFG_ENV_SIZE-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[1].size = 0;

 		debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
 			memctl->memc_br1, memctl->memc_or1);
 	}

 	debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

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

 	return (size_b0 + size_b1);
 }

 /*-----------------------------------------------------------------------
  */
 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) {
 #ifdef CONFIG_TQM8xxM	/* mirror bit flash */
 	case FLASH_AMLV128U:	printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
 				break;
 	case FLASH_AMLV320U:	printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
 				break;
 	case FLASH_AMLV640U:	printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
 				break;
 	case FLASH_AMLV320B:	printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
 				break;
 # else	/* ! TQM8xxM */
 	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_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 				break;
 	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 				break;
 #endif	/* TQM8xxM */
 	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_AMDL163B:	printf ("AM29DL163B (16 Mbit, bottom boot sect)\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;
 }

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


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

 /*
  * The following code cannot be run from FLASH!
  */

 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[0x0555] = 0x00AA00AA;
 	addr[0x02AA] = 0x00550055;
 	addr[0x0555] = 0x00900090;

 	value = addr[0];

 	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);

 	switch (value) {
 	case AMD_MANUFACT:
 		debug ("Manufacturer: AMD\n");
 		info->flash_id = FLASH_MAN_AMD;
 		break;
 	case FUJ_MANUFACT:
 		debug ("Manufacturer: FUJITSU\n");
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	default:
 		debug ("Manufacturer: *** unknown ***\n");
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		return (0);			/* no or unknown flash	*/
 	}

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

 	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);

 	switch (value) {
 #ifdef CONFIG_TQM8xxM	/* mirror bit flash */
 	case AMD_ID_MIRROR:
 		debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 			addr[14], addr[15]);
 		/* Special case for AMLV320MH/L */
 		if ((addr[14] & 0x00ff00ff) == 0x001d001d &&
 		    (addr[15] & 0x00ff00ff) == 0x00000000) {
 			debug ("Chip: AMLV320MH/L\n");
 			info->flash_id += FLASH_AMLV320U;
 			info->sector_count = 64;
 			info->size = 0x00800000;	/* => 8 MB */
 			break;
 		}
 		switch(addr[14]) {
 		case AMD_ID_LV128U_2:
 			if (addr[15] != AMD_ID_LV128U_3) {
 				debug ("Chip: AMLV128U -> unknown\n");
 				info->flash_id = FLASH_UNKNOWN;
 			} else {
 				debug ("Chip: AMLV128U\n");
 				info->flash_id += FLASH_AMLV128U;
 				info->sector_count = 256;
 				info->size = 0x02000000;
 			}
 			break;				/* => 32 MB	*/
 		case AMD_ID_LV640U_2:
 			if (addr[15] != AMD_ID_LV640U_3) {
 				debug ("Chip: AMLV640U -> unknown\n");
 				info->flash_id = FLASH_UNKNOWN;
 			} else {
 				debug ("Chip: AMLV640U\n");
 				info->flash_id += FLASH_AMLV640U;
 				info->sector_count = 128;
 				info->size = 0x01000000;
 			}
 			break;				/* => 16 MB	*/
 		case AMD_ID_LV320B_2:
 			if (addr[15] != AMD_ID_LV320B_3) {
 				debug ("Chip: AMLV320B -> unknown\n");
 				info->flash_id = FLASH_UNKNOWN;
 			} else {
 				debug ("Chip: AMLV320B\n");
 				info->flash_id += FLASH_AMLV320B;
 				info->sector_count = 71;
 				info->size = 0x00800000;
 			}
 			break;				/* =>  8 MB	*/
 		default:
 			debug ("Chip: *** unknown ***\n");
 			info->flash_id = FLASH_UNKNOWN;
 			break;
 		}
 		break;
 # else	/* ! TQM8xxM */
 	case AMD_ID_LV400T:
 		info->flash_id += FLASH_AM400T;
 		info->sector_count = 11;
 		info->size = 0x00100000;
 		break;					/* => 1 MB		*/

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

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

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

 	case AMD_ID_LV320T:
 		info->flash_id += FLASH_AM320T;
 		info->sector_count = 71;
 		info->size = 0x00800000;
 		break;					/* => 8 MB	*/

 	case AMD_ID_LV320B:
 		info->flash_id += FLASH_AM320B;
 		info->sector_count = 71;
 		info->size = 0x00800000;
 		break;					/* => 8 MB	*/
 #endif	/* TQM8xxM */

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

 	case AMD_ID_LV160B:
 		info->flash_id += FLASH_AM160B;
 		info->sector_count = 35;
 		info->size = 0x00400000;
 		break;					/* => 4 MB	*/

 	case AMD_ID_DL163B:
 		info->flash_id += FLASH_AMDL163B;
 		info->sector_count = 39;
 		info->size = 0x00400000;
 		break;					/* => 4 MB	*/

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

 	/* set up sector start address table */
 	switch (value) {
 #ifdef CONFIG_TQM8xxM	/* mirror bit flash */
 	case AMD_ID_MIRROR:
 		switch (info->flash_id & FLASH_TYPEMASK) {
 			/* only known types here - no default */
 		case FLASH_AMLV128U:
 		case FLASH_AMLV640U:
 		case FLASH_AMLV320U:
 			for (i = 0; i < info->sector_count; i++) {
 				info->start[i] = base;
 				base += 0x20000;
 			}
 			break;
 		case FLASH_AMLV320B:
 			for (i = 0; i < info->sector_count; i++) {
 				info->start[i] = base;
 				/*
 				 * The first 8 sectors are 8 kB,
 				 * all the other ones  are 64 kB
 				 */
 				base += (i < 8)
 					?  2 * ( 8 << 10)
 					:  2 * (64 << 10);
 			}
 			break;
 		}
 		break;
 # else	/* ! TQM8xxM */
 	case AMD_ID_LV400B:
 	case AMD_ID_LV800B:
 		/* 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;
 		}
 		break;
 	case AMD_ID_LV400T:
 	case AMD_ID_LV800T:
 		/* set sector offsets for top boot block type		*/
 		i = info->sector_count - 1;
 		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;
 		}
 		break;
 	case AMD_ID_LV320B:
 		for (i = 0; i < info->sector_count; i++) {
 			info->start[i] = base;
 			/*
 			 * The first 8 sectors are 8 kB,
 			 * all the other ones  are 64 kB
 			 */
 			base += (i < 8)
 				?  2 * ( 8 << 10)
 				:  2 * (64 << 10);
 		}
 		break;
 	case AMD_ID_LV320T:
 		for (i = 0; i < info->sector_count; i++) {
 			info->start[i] = base;
 			/*
 			 * The last 8 sectors are 8 kB,
 			 * all the other ones  are 64 kB
 			 */
 			base += (i < (info->sector_count - 8))
 				?  2 * (64 << 10)
 				:  2 * ( 8 << 10);
 		}
 		break;
 #endif	/* TQM8xxM */
 	case AMD_ID_LV160B:
 		/* 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;
 		}
 		break;
 	case AMD_ID_LV160T:
 		/* set sector offsets for top boot block type		*/
 		i = info->sector_count - 1;
 		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;
 		}
 		break;
 	case AMD_ID_DL163B:
 		for (i = 0; i < info->sector_count; i++) {
 			info->start[i] = base;
 			/*
 			 * The first 8 sectors are 8 kB,
 			 * all the other ones  are 64 kB
 			 */
 			base += (i < 8)
 				?  2 * ( 8 << 10)
 				:  2 * (64 << 10);
 		}
 		break;
 	default:
 		return (0);
 		break;
 	}

 #if 0
 	/* 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[2] & 1;
 	}
 #endif

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

 		*addr = 0x00F000F0;	/* 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;

 	debug ("flash_erase: first: %d last: %d\n", s_first, s_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[0x0555] = 0x00AA00AA;
 	addr[0x02AA] = 0x00550055;
 	addr[0x0555] = 0x00800080;
 	addr[0x0555] = 0x00AA00AA;
 	addr[0x02AA] = 0x00550055;

 	/* 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] = 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;
 	addr = (vu_long*)(info->start[l_sect]);
 	while ((addr[0] & 0x00800080) != 0x00800080) {
 		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 = (volatile unsigned long *)info->start[0];
 	addr[0] = 0x00F000F0;	/* 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[0x0555] = 0x00AA00AA;
 	addr[0x02AA] = 0x00550055;
 	addr[0x0555] = 0x00A000A0;

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

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

 #endif /* !defined(CFG_FLASH_CFI_DRIVER) */
	/*
	* (C) Copyright 2000-2004
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#if 0
	#define DEBUG
	#endif

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

	#include <asm/processor.h>

	DECLARE_GLOBAL_DATA_PTR;

	#if !defined(CFG_FLASH_CFI_DRIVER) /* do not use if CFI driver is configured */

	#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
	&& !defined(CONFIG_TQM885D)
	# ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
	# define CFG_OR_TIMING_FLASH_AT_50MHZ (OR_ACS_DIV1 \| OR_TRLX \| OR_CSNT_SAM \| \
	OR_SCY_2_CLK \| OR_EHTR \| OR_BI)
	# endif
	#endif /* CONFIG_TQM8xxL/M, !TQM866M, !TQM885D */

	#ifndef CFG_ENV_ADDR
	#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	#endif

	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);

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

	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;

	#ifdef CFG_OR_TIMING_FLASH_AT_50MHZ
	int scy, trlx, flash_or_timing, clk_diff;

	scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
	if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
	trlx = OR_TRLX;
	scy *= 2;
	} else
	trlx = 0;

	/* We assume that each 10MHz of bus clock require 1-clk SCY
	* adjustment.
	*/
	clk_diff = (gd->bus_clk / 1000000) - 50;

	/* We need proper rounding here. This is what the "+5" and "-5"
	* are here for.
	*/
	if (clk_diff >= 0)
	scy += (clk_diff + 5) / 10;
	else
	scy += (clk_diff - 5) / 10;

	/* For bus frequencies above 50MHz, we want to use relaxed timing
	* (OR_TRLX).
	*/
	if (gd->bus_clk >= 50000000)
	trlx = OR_TRLX;
	else
	trlx = 0;

	if (trlx)
	scy /= 2;

	if (scy > 0xf)
	scy = 0xf;
	if (scy < 1)
	scy = 1;

	flash_or_timing = (scy << 4) \| trlx \|
	(CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX \| OR_SCY_MSK));
	#endif
	/* 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 */

	debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);

	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);

	debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);

	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((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);

	debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	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);
	}

	debug ("## Before remap: "
	"BR0: 0x%08x OR0: 0x%08x "
	"BR1: 0x%08x OR1: 0x%08x\n",
	memctl->memc_br0, memctl->memc_or0,
	memctl->memc_br1, memctl->memc_or1);

	/* Remap FLASH according to real size */
	#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size_b0 & OR_AM_MSK);
	#else
	memctl->memc_or0 = flash_or_timing \| (-size_b0 & OR_AM_MSK);
	#endif
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V;

	debug ("## BR0: 0x%08x OR0: 0x%08x\n",
	memctl->memc_br0, memctl->memc_or0);

	/* Re-do sizing to get full correct info */
	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);

	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* monitor protection ON by default */
	debug ("Protect monitor: %08lx ... %08lx\n",
	(ulong)CFG_MONITOR_BASE,
	(ulong)CFG_MONITOR_BASE + monitor_flash_len - 1);

	flash_protect(FLAG_PROTECT_SET,
	CFG_MONITOR_BASE,
	CFG_MONITOR_BASE + monitor_flash_len - 1,
	&flash_info[0]);
	#endif

	#ifdef CFG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	# ifdef CFG_ENV_ADDR_REDUND
	debug ("Protect primary environment: %08lx ... %08lx\n",
	(ulong)CFG_ENV_ADDR,
	(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
	# else
	debug ("Protect environment: %08lx ... %08lx\n",
	(ulong)CFG_ENV_ADDR,
	(ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
	# endif

	flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR,
	CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
	&flash_info[0]);
	#endif

	#ifdef CFG_ENV_ADDR_REDUND
	debug ("Protect redundand environment: %08lx ... %08lx\n",
	(ulong)CFG_ENV_ADDR_REDUND,
	(ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1);

	flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR_REDUND,
	CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
	&flash_info[0]);
	#endif

	if (size_b1) {
	#ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
	memctl->memc_or1 = CFG_OR_TIMING_FLASH \| (-size_b1 & 0xFFFF8000);
	#else
	memctl->memc_or1 = flash_or_timing \| (-size_b1 & 0xFFFF8000);
	#endif
	memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) \|
	BR_MS_GPCM \| BR_V;

	debug ("## BR1: 0x%08x OR1: 0x%08x\n",
	memctl->memc_br1, memctl->memc_or1);

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

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

	#ifdef CFG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR,
	CFG_ENV_ADDR+CFG_ENV_SIZE-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[1].size = 0;

	debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n",
	memctl->memc_br1, memctl->memc_or1);
	}

	debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

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

	return (size_b0 + size_b1);
	}

	/*-----------------------------------------------------------------------
	*/
	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) {
	#ifdef CONFIG_TQM8xxM /* mirror bit flash */
	case FLASH_AMLV128U: printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
	break;
	case FLASH_AMLV320U: printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
	break;
	case FLASH_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
	break;
	case FLASH_AMLV320B: printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
	break;
	# else /* ! TQM8xxM */
	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_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	break;
	#endif /* TQM8xxM */
	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_AMDL163B: printf ("AM29DL163B (16 Mbit, bottom boot sect)\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;
	}

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


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

	/*
	* The following code cannot be run from FLASH!
	*/

	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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00900090;

	value = addr[0];

	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);

	switch (value) {
	case AMD_MANUFACT:
	debug ("Manufacturer: AMD\n");
	info->flash_id = FLASH_MAN_AMD;
	break;
	case FUJ_MANUFACT:
	debug ("Manufacturer: FUJITSU\n");
	info->flash_id = FLASH_MAN_FUJ;
	break;
	default:
	debug ("Manufacturer: * unknown *\n");
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0); /* no or unknown flash */
	}

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

	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);

	switch (value) {
	#ifdef CONFIG_TQM8xxM /* mirror bit flash */
	case AMD_ID_MIRROR:
	debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n",
	addr[14], addr[15]);
	/* Special case for AMLV320MH/L */
	if ((addr[14] & 0x00ff00ff) == 0x001d001d &&
	(addr[15] & 0x00ff00ff) == 0x00000000) {
	debug ("Chip: AMLV320MH/L\n");
	info->flash_id += FLASH_AMLV320U;
	info->sector_count = 64;
	info->size = 0x00800000; /* => 8 MB */
	break;
	}
	switch(addr[14]) {
	case AMD_ID_LV128U_2:
	if (addr[15] != AMD_ID_LV128U_3) {
	debug ("Chip: AMLV128U -> unknown\n");
	info->flash_id = FLASH_UNKNOWN;
	} else {
	debug ("Chip: AMLV128U\n");
	info->flash_id += FLASH_AMLV128U;
	info->sector_count = 256;
	info->size = 0x02000000;
	}
	break; /* => 32 MB */
	case AMD_ID_LV640U_2:
	if (addr[15] != AMD_ID_LV640U_3) {
	debug ("Chip: AMLV640U -> unknown\n");
	info->flash_id = FLASH_UNKNOWN;
	} else {
	debug ("Chip: AMLV640U\n");
	info->flash_id += FLASH_AMLV640U;
	info->sector_count = 128;
	info->size = 0x01000000;
	}
	break; /* => 16 MB */
	case AMD_ID_LV320B_2:
	if (addr[15] != AMD_ID_LV320B_3) {
	debug ("Chip: AMLV320B -> unknown\n");
	info->flash_id = FLASH_UNKNOWN;
	} else {
	debug ("Chip: AMLV320B\n");
	info->flash_id += FLASH_AMLV320B;
	info->sector_count = 71;
	info->size = 0x00800000;
	}
	break; /* => 8 MB */
	default:
	debug ("Chip: * unknown *\n");
	info->flash_id = FLASH_UNKNOWN;
	break;
	}
	break;
	# else /* ! TQM8xxM */
	case AMD_ID_LV400T:
	info->flash_id += FLASH_AM400T;
	info->sector_count = 11;
	info->size = 0x00100000;
	break; /* => 1 MB */

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

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

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

	case AMD_ID_LV320T:
	info->flash_id += FLASH_AM320T;
	info->sector_count = 71;
	info->size = 0x00800000;
	break; /* => 8 MB */

	case AMD_ID_LV320B:
	info->flash_id += FLASH_AM320B;
	info->sector_count = 71;
	info->size = 0x00800000;
	break; /* => 8 MB */
	#endif /* TQM8xxM */

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

	case AMD_ID_LV160B:
	info->flash_id += FLASH_AM160B;
	info->sector_count = 35;
	info->size = 0x00400000;
	break; /* => 4 MB */

	case AMD_ID_DL163B:
	info->flash_id += FLASH_AMDL163B;
	info->sector_count = 39;
	info->size = 0x00400000;
	break; /* => 4 MB */

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

	/* set up sector start address table */
	switch (value) {
	#ifdef CONFIG_TQM8xxM /* mirror bit flash */
	case AMD_ID_MIRROR:
	switch (info->flash_id & FLASH_TYPEMASK) {
	/* only known types here - no default */
	case FLASH_AMLV128U:
	case FLASH_AMLV640U:
	case FLASH_AMLV320U:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	base += 0x20000;
	}
	break;
	case FLASH_AMLV320B:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	/*
	* The first 8 sectors are 8 kB,
	* all the other ones are 64 kB
	*/
	base += (i < 8)
	? 2 * ( 8 << 10)
	: 2 * (64 << 10);
	}
	break;
	}
	break;
	# else /* ! TQM8xxM */
	case AMD_ID_LV400B:
	case AMD_ID_LV800B:
	/* 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;
	}
	break;
	case AMD_ID_LV400T:
	case AMD_ID_LV800T:
	/* set sector offsets for top boot block type */
	i = info->sector_count - 1;
	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;
	}
	break;
	case AMD_ID_LV320B:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	/*
	* The first 8 sectors are 8 kB,
	* all the other ones are 64 kB
	*/
	base += (i < 8)
	? 2 * ( 8 << 10)
	: 2 * (64 << 10);
	}
	break;
	case AMD_ID_LV320T:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	/*
	* The last 8 sectors are 8 kB,
	* all the other ones are 64 kB
	*/
	base += (i < (info->sector_count - 8))
	? 2 * (64 << 10)
	: 2 * ( 8 << 10);
	}
	break;
	#endif /* TQM8xxM */
	case AMD_ID_LV160B:
	/* 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;
	}
	break;
	case AMD_ID_LV160T:
	/* set sector offsets for top boot block type */
	i = info->sector_count - 1;
	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;
	}
	break;
	case AMD_ID_DL163B:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	/*
	* The first 8 sectors are 8 kB,
	* all the other ones are 64 kB
	*/
	base += (i < 8)
	? 2 * ( 8 << 10)
	: 2 * (64 << 10);
	}
	break;
	default:
	return (0);
	break;
	}

	#if 0
	/* 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[2] & 1;
	}
	#endif

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

	addr = 0x00F000F0; / 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;

	debug ("flash_erase: first: %d last: %d\n", s_first, s_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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00800080;
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;

	/* 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] = 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;
	addr = (vu_long*)(info->start[l_sect]);
	while ((addr[0] & 0x00800080) != 0x00800080) {
	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 = (volatile unsigned long *)info->start[0];
	addr[0] = 0x00F000F0; /* 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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;

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

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

	#endif /* !defined(CFG_FLASH_CFI_DRIVER) */