board/lwmon/flash.c - uboot/mindspeed - Git at Google

 /*
  * (C) Copyright 2001
  * 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
  */

 /* #define DEBUG */

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

 #if defined(CFG_ENV_IS_IN_FLASH)
 # ifndef  CFG_ENV_ADDR
 #  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
 # endif
 # ifndef  CFG_ENV_SIZE
 #  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
 # endif
 # ifndef  CFG_ENV_SECT_SIZE
 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
 # endif
 #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_data (flash_info_t *info, ulong dest, ulong data);
 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
 #endif
 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 */

 	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]);

 	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 		printf ("## Unknown FLASH on Bank 0: "
 			"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
 			flash_info[0].flash_id,
 			size_b0, size_b0<<20);
 	}

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

 	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 */
 	memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
 				OR_CSNT_SAM | OR_ACS_DIV1;
 	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | 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]);

 	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

 	flash_info[0].size = size_b0;

 #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[0]);
 #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_SECT_SIZE-1,
 		      &flash_info[0]);
 #endif

 	if (size_b1) {
 		memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH |
 					OR_CSNT_SAM | OR_ACS_DIV1;
 		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
 					BR_PS_32 | 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]);

 		flash_info[1].size = size_b1;

 		flash_get_offsets (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_SECT_SIZE-1,
 			      &flash_info[1]);
 #endif
 	} else {
 		memctl->memc_br1 = 0;		/* invalidate bank */
 		memctl->memc_or1 = 0;		/* invalidate bank */

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

 		flash_info[1].flash_id = FLASH_UNKNOWN;
 		flash_info[1].sector_count = -1;
 		flash_info[1].size = 0;
 	}

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

 	return (size_b0 + size_b1);
 }

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

 	if (info->flash_id == FLASH_UNKNOWN) {
 		return;
 	}

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case FLASH_MAN_INTEL:
 	    for (i = 0; i < info->sector_count; i++) {
 		info->start[i] = base;
 		base += 0x00020000 * 2;		/* 128k * 2 chips per bank */
 	    }
 	    return;

 	default:
 	    printf ("Don't know sector ofsets for flash type 0x%lx\n",
 		info->flash_id);
 	    return;
 	}
 }

 /*-----------------------------------------------------------------------
  */
 void flash_print_info  (flash_info_t *info)
 {
 	int i;

 	if (info->flash_id == FLASH_UNKNOWN) {
 		printf ("missing or unknown FLASH type\n");
 		return;
 	}

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case FLASH_MAN_AMD:	printf ("AMD ");		break;
 	case FLASH_MAN_FUJ:	printf ("Fujitsu ");		break;
 	case FLASH_MAN_SST:	printf ("SST ");		break;
 	case FLASH_MAN_STM:	printf ("STM ");		break;
 	case FLASH_MAN_INTEL:	printf ("Intel ");		break;
 	case FLASH_MAN_MT:	printf ("MT ");			break;
 	default:		printf ("Unknown Vendor ");	break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_28F320J3A:	printf ("28F320J3A (32Mbit = 128K x 32)\n");
 				break;
 	case FLASH_28F640J3A:	printf ("28F640J3A (64Mbit = 128K x 64)\n");
 				break;
 	case FLASH_28F128J3A:	printf ("28F128J3A (128Mbit = 128K x 128)\n");
 				break;
 	default:		printf ("Unknown Chip Type\n");
 				break;
 	}

 	if (info->size >= (1 << 20)) {
 		i = 20;
 	} else {
 		i = 10;
 	}
 	printf ("  Size: %ld %cB in %d Sectors\n",
 		info->size >> i,
 		(i == 20) ? 'M' : 'k',
 		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)
 {
 	ulong value;

 	/* Read Manufacturer ID */
 	addr[0] = 0x00900090;
 	value = addr[0];

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

 	switch (value) {
 	case AMD_MANUFACT:
 		info->flash_id = FLASH_MAN_AMD;
 		break;
 	case FUJ_MANUFACT:
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	case SST_MANUFACT:
 		info->flash_id = FLASH_MAN_SST;
 		break;
 	case STM_MANUFACT:
 		info->flash_id = FLASH_MAN_STM;
 		break;
 	case INTEL_MANUFACT:
 		info->flash_id = FLASH_MAN_INTEL;
 		break;
 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		addr[0] = 0x00FF00FF;		/* restore read mode */
 		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) {
 	case INTEL_ID_28F320J3A:
 		info->flash_id += FLASH_28F320J3A;
 		info->sector_count = 32;
 		info->size = 0x00400000 * 2;
 		break;				/* =>  8 MB		*/

 	case INTEL_ID_28F640J3A:
 		info->flash_id += FLASH_28F640J3A;
 		info->sector_count = 64;
 		info->size = 0x00800000 * 2;
 		break;				/* => 16 MB		*/

 	case INTEL_ID_28F128J3A:
 		info->flash_id += FLASH_28F128J3A;
 		info->sector_count = 128;
 		info->size = 0x01000000 * 2;
 		break;				/* => 32 MB		*/

 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		addr[0] = 0x00FF00FF;		/* restore read mode */
 		return (0);			/* => no or unknown flash */

 	}

 	if (info->sector_count > CFG_MAX_FLASH_SECT) {
 		printf ("** ERROR: sector count %d > max (%d) **\n",
 			info->sector_count, CFG_MAX_FLASH_SECT);
 		info->sector_count = CFG_MAX_FLASH_SECT;
 	}

 	addr[0] = 0x00FF00FF;		/* restore read mode */

 	return (info->size);
 }


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

 int	flash_erase (flash_info_t *info, int s_first, int s_last)
 {
 	int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) {
 		printf ("Can erase only Intel flash types - aborted\n");
 		return 1;
 	}

 	prot = 0;
 	for (sect=s_first; sect<=s_last; ++sect) {
 		if (info->protect[sect]) {
 			prot++;
 		}
 	}

 	if (prot) {
 		printf ("- Warning: %d protected sectors will not be erased!\n",
 			prot);
 	} else {
 		printf ("\n");
 	}

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

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

 			*addr = 0x00600060;	/* clear lock bit setup */
 			*addr = 0x00D000D0;	/* clear lock bit confirm */

 			udelay (1000);
 			/* This takes awfully long - up to 50 ms and more */
 			while (((status = *addr) & 0x00800080) != 0x00800080) {
 				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 					printf ("Timeout\n");
 					*addr = 0x00FF00FF; /* reset to read mode */
 					return 1;
 				}

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

 			*addr = 0x00500050;	/* clear status register */
 			*addr = 0x00200020;	/* erase setup */
 			*addr = 0x00D000D0;	/* erase confirm */

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

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

 			while (((status = *addr) & 0x00800080) != 0x00800080) {
 				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 					printf ("Timeout\n");
 					*addr = 0x00B000B0; /* suspend erase	  */
 					*addr = 0x00FF00FF; /* reset to read mode */
 					return 1;
 				}

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

 			*addr = 0x00FF00FF;	/* reset to read mode */
 		}
 	}
 	printf (" done\n");
 	return 0;
 }

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

 #define	FLASH_WIDTH	4	/* flash bus width in bytes */

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

 	if (info->flash_id == FLASH_UNKNOWN) {
 		return 4;
 	}

 	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
 			data = (data << 8) | *src++;
 			--cnt;
 			++cp;
 		}
 		for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
 			data = (data << 8) | (*(uchar *)cp);
 		}

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

 	/*
 	 * handle FLASH_WIDTH aligned part
 	 */
 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 	while(cnt >= FLASH_WIDTH) {
 		i = CFG_FLASH_BUFFER_SIZE > cnt ?
 		    (cnt & ~(FLASH_WIDTH - 1)) : CFG_FLASH_BUFFER_SIZE;
 		if((rc = write_data_buf(info, wp, src,i)) != 0)
 			return rc;
 		wp += i;
 		src += i;
 		cnt -=i;
 	}
 #else
 	while (cnt >= FLASH_WIDTH) {
 		data = 0;
 		for (i=0; i<FLASH_WIDTH; ++i) {
 			data = (data << 8) | *src++;
 		}
 		if ((rc = write_data(info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp  += FLASH_WIDTH;
 		cnt -= FLASH_WIDTH;
 	}
 #endif /* CFG_FLASH_USE_BUFFER_WRITE */

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

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

 	return (write_data(info, wp, data));
 }

 /*-----------------------------------------------------------------------
  * Check flash status, returns:
  * 0 - OK
  * 1 - timeout
  */
 static int flash_status_check(vu_long *addr, ulong tout, char * prompt)
 {
 	ulong status;
 	ulong start;

 	/* Wait for command completion */
 	start = get_timer (0);
 	while(((status = *addr) & 0x00800080) != 0x00800080) {
 		if (get_timer(start) > tout) {
 			printf("Flash %s timeout at address %p\n", prompt, addr);
 			*addr = 0x00FF00FF;	/* restore read mode */
 			return (1);
 		}
 	}
 	return 0;
 }

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

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

 	*addr = 0x00400040;		/* write setup */
 	*addr = data;

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

 	if (flash_status_check(addr, CFG_FLASH_WRITE_TOUT, "write") != 0) {
 		return (1);
 	}

 	*addr = 0x00FF00FF;	/* restore read mode */

 	return (0);
 }

 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 /*-----------------------------------------------------------------------
  * Write a buffer to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  */
 static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
 {
 	vu_long *addr = (vu_long *)dest;
 	int sector;
 	int cnt;
 	int retcode;
 	vu_long * src = (vu_long *)cp;
 	vu_long * dst = (vu_long *)dest;

 	/* find sector */
 	for(sector = info->sector_count - 1; sector >= 0; sector--) {
 		if(dest >= info->start[sector])
 			break;
 	}

 	*addr = 0x00500050;		/* clear status */
 	*addr = 0x00e800e8;		/* write buffer */

 	if((retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
 					 "write to buffer")) == 0) {
 		cnt = len / FLASH_WIDTH;
 		*addr = (cnt-1) | ((cnt-1) << 16);
 		while(cnt-- > 0) {
 			*dst++ = *src++;
 		}
 		*addr = 0x00d000d0;		/* write buffer confirm */
 		retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
 						 "buffer write");
 	}
 	*addr = 0x00FF00FF;	/* restore read mode */
 	*addr = 0x00500050;	/* clear status */
 	return retcode;
 }
 #endif /* CFG_USE_FLASH_BUFFER_WRITE */

 /*-----------------------------------------------------------------------
  */
	/*
	* (C) Copyright 2001
	* 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
	*/

	/* #define DEBUG */

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

	#if defined(CFG_ENV_IS_IN_FLASH)
	# ifndef CFG_ENV_ADDR
	# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	# endif
	# ifndef CFG_ENV_SIZE
	# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
	# endif
	# ifndef CFG_ENV_SECT_SIZE
	# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
	# endif
	#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_data (flash_info_t *info, ulong dest, ulong data);
	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	static int write_data_buf (flash_info_t * info, ulong dest, uchar * cp, int len);
	#endif
	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 */

	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]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	printf ("## Unknown FLASH on Bank 0: "
	"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
	flash_info[0].flash_id,
	size_b0, size_b0<<20);
	}

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

	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 */
	memctl->memc_or0 = (-size_b0 & 0xFFFF8000) \| CFG_OR_TIMING_FLASH \|
	OR_CSNT_SAM \| OR_ACS_DIV1;
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_PS_32 \| 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]);

	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

	flash_info[0].size = size_b0;

	#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[0]);
	#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_SECT_SIZE-1,
	&flash_info[0]);
	#endif

	if (size_b1) {
	memctl->memc_or1 = (-size_b1 & 0xFFFF8000) \| CFG_OR_TIMING_FLASH \|
	OR_CSNT_SAM \| OR_ACS_DIV1;
	memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) \|
	BR_PS_32 \| 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]);

	flash_info[1].size = size_b1;

	flash_get_offsets (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_SECT_SIZE-1,
	&flash_info[1]);
	#endif
	} else {
	memctl->memc_br1 = 0; /* invalidate bank */
	memctl->memc_or1 = 0; /* invalidate bank */

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

	flash_info[1].flash_id = FLASH_UNKNOWN;
	flash_info[1].sector_count = -1;
	flash_info[1].size = 0;
	}

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

	return (size_b0 + size_b1);
	}

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

	if (info->flash_id == FLASH_UNKNOWN) {
	return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_INTEL:
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base;
	base += 0x00020000 * 2; /* 128k * 2 chips per bank */
	}
	return;

	default:
	printf ("Don't know sector ofsets for flash type 0x%lx\n",
	info->flash_id);
	return;
	}
	}

	/*-----------------------------------------------------------------------
	*/
	void flash_print_info (flash_info_t *info)
	{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
	printf ("missing or unknown FLASH type\n");
	return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD: printf ("AMD "); break;
	case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
	case FLASH_MAN_SST: printf ("SST "); break;
	case FLASH_MAN_STM: printf ("STM "); break;
	case FLASH_MAN_INTEL: printf ("Intel "); break;
	case FLASH_MAN_MT: printf ("MT "); break;
	default: printf ("Unknown Vendor "); break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n");
	break;
	case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n");
	break;
	case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n");
	break;
	default: printf ("Unknown Chip Type\n");
	break;
	}

	if (info->size >= (1 << 20)) {
	i = 20;
	} else {
	i = 10;
	}
	printf (" Size: %ld %cB in %d Sectors\n",
	info->size >> i,
	(i == 20) ? 'M' : 'k',
	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)
	{
	ulong value;

	/* Read Manufacturer ID */
	addr[0] = 0x00900090;
	value = addr[0];

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

	switch (value) {
	case AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	break;
	case FUJ_MANUFACT:
	info->flash_id = FLASH_MAN_FUJ;
	break;
	case SST_MANUFACT:
	info->flash_id = FLASH_MAN_SST;
	break;
	case STM_MANUFACT:
	info->flash_id = FLASH_MAN_STM;
	break;
	case INTEL_MANUFACT:
	info->flash_id = FLASH_MAN_INTEL;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	addr[0] = 0x00FF00FF; /* restore read mode */
	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) {
	case INTEL_ID_28F320J3A:
	info->flash_id += FLASH_28F320J3A;
	info->sector_count = 32;
	info->size = 0x00400000 * 2;
	break; /* => 8 MB */

	case INTEL_ID_28F640J3A:
	info->flash_id += FLASH_28F640J3A;
	info->sector_count = 64;
	info->size = 0x00800000 * 2;
	break; /* => 16 MB */

	case INTEL_ID_28F128J3A:
	info->flash_id += FLASH_28F128J3A;
	info->sector_count = 128;
	info->size = 0x01000000 * 2;
	break; /* => 32 MB */

	default:
	info->flash_id = FLASH_UNKNOWN;
	addr[0] = 0x00FF00FF; /* restore read mode */
	return (0); /* => no or unknown flash */

	}

	if (info->sector_count > CFG_MAX_FLASH_SECT) {
	printf (" ERROR: sector count %d > max (%d) \n",
	info->sector_count, CFG_MAX_FLASH_SECT);
	info->sector_count = CFG_MAX_FLASH_SECT;
	}

	addr[0] = 0x00FF00FF; /* restore read mode */

	return (info->size);
	}


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

	int flash_erase (flash_info_t *info, int s_first, int s_last)
	{
	int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) {
	printf ("Can erase only Intel flash types - aborted\n");
	return 1;
	}

	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
	if (info->protect[sect]) {
	prot++;
	}
	}

	if (prot) {
	printf ("- Warning: %d protected sectors will not be erased!\n",
	prot);
	} else {
	printf ("\n");
	}

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

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

	addr = 0x00600060; / clear lock bit setup */
	addr = 0x00D000D0; / clear lock bit confirm */

	udelay (1000);
	/* This takes awfully long - up to 50 ms and more */
	while (((status = *addr) & 0x00800080) != 0x00800080) {
	if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	addr = 0x00FF00FF; / reset to read mode */
	return 1;
	}

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

	addr = 0x00500050; / clear status register */
	addr = 0x00200020; / erase setup */
	addr = 0x00D000D0; / erase confirm */

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

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

	while (((status = *addr) & 0x00800080) != 0x00800080) {
	if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	addr = 0x00B000B0; / suspend erase */
	addr = 0x00FF00FF; / reset to read mode */
	return 1;
	}

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

	addr = 0x00FF00FF; / reset to read mode */
	}
	}
	printf (" done\n");
	return 0;
	}

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

	#define FLASH_WIDTH 4 /* flash bus width in bytes */

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

	if (info->flash_id == FLASH_UNKNOWN) {
	return 4;
	}

	wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
	data = (data << 8) \| *src++;
	--cnt;
	++cp;
	}
	for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
	data = (data << 8) \| ((uchar )cp);
	}

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

	/*
	* handle FLASH_WIDTH aligned part
	*/
	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	while(cnt >= FLASH_WIDTH) {
	i = CFG_FLASH_BUFFER_SIZE > cnt ?
	(cnt & ~(FLASH_WIDTH - 1)) : CFG_FLASH_BUFFER_SIZE;
	if((rc = write_data_buf(info, wp, src,i)) != 0)
	return rc;
	wp += i;
	src += i;
	cnt -=i;
	}
	#else
	while (cnt >= FLASH_WIDTH) {
	data = 0;
	for (i=0; i<FLASH_WIDTH; ++i) {
	data = (data << 8) \| *src++;
	}
	if ((rc = write_data(info, wp, data)) != 0) {
	return (rc);
	}
	wp += FLASH_WIDTH;
	cnt -= FLASH_WIDTH;
	}
	#endif /* CFG_FLASH_USE_BUFFER_WRITE */

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

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

	return (write_data(info, wp, data));
	}

	/*-----------------------------------------------------------------------
	* Check flash status, returns:
	* 0 - OK
	* 1 - timeout
	*/
	static int flash_status_check(vu_long addr, ulong tout, char prompt)
	{
	ulong status;
	ulong start;

	/* Wait for command completion */
	start = get_timer (0);
	while(((status = *addr) & 0x00800080) != 0x00800080) {
	if (get_timer(start) > tout) {
	printf("Flash %s timeout at address %p\n", prompt, addr);
	addr = 0x00FF00FF; / restore read mode */
	return (1);
	}
	}
	return 0;
	}

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

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

	addr = 0x00400040; / write setup */
	*addr = data;

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

	if (flash_status_check(addr, CFG_FLASH_WRITE_TOUT, "write") != 0) {
	return (1);
	}

	addr = 0x00FF00FF; / restore read mode */

	return (0);
	}

	#ifdef CFG_FLASH_USE_BUFFER_WRITE
	/*-----------------------------------------------------------------------
	* Write a buffer to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	*/
	static int write_data_buf(flash_info_t * info, ulong dest, uchar * cp, int len)
	{
	vu_long addr = (vu_long )dest;
	int sector;
	int cnt;
	int retcode;
	vu_long * src = (vu_long *)cp;
	vu_long * dst = (vu_long *)dest;

	/* find sector */
	for(sector = info->sector_count - 1; sector >= 0; sector--) {
	if(dest >= info->start[sector])
	break;
	}

	addr = 0x00500050; / clear status */
	addr = 0x00e800e8; / write buffer */

	if((retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
	"write to buffer")) == 0) {
	cnt = len / FLASH_WIDTH;
	*addr = (cnt-1) \| ((cnt-1) << 16);
	while(cnt-- > 0) {
	dst++ = src++;
	}
	addr = 0x00d000d0; / write buffer confirm */
	retcode = flash_status_check(addr, CFG_FLASH_BUFFER_WRITE_TOUT,
	"buffer write");
	}
	addr = 0x00FF00FF; / restore read mode */
	addr = 0x00500050; / clear status */
	return retcode;
	}
	#endif /* CFG_USE_FLASH_BUFFER_WRITE */

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