/* * (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 */#include <common.h>#include <mpc8xx.h>#ifndef	CFG_ENV_ADDR#define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)#endif#define CONFIG_FLASH_16BITflash_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;	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((vu_long *)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);	}	/* Remap FLASH according to real size */	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16;	/* 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 */	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_SIZE-1,		      &flash_info[0]);#endif	flash_info[0].size = size_b0;	return (size_b0);}/*----------------------------------------------------------------------- */void flash_print_info  (flash_info_t *info){	int i;	if (info->flash_id == FLASH_UNKNOWN) {		printf ("missing or unknown FLASH type\n");		return;	}	switch (info->flash_id & FLASH_VENDMASK) {	case FLASH_MAN_AMD:	printf ("AMD ");		break;	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;	default:		printf ("Unknown Vendor ");	break;	}	switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");				break;	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");				break;	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");				break;	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");				break;	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");				break;	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");				break;	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");				break;	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");				break;	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 */	vu_short *s_addr=(vu_short*)addr;	s_addr[0x5555] = 0x00AA;	s_addr[0x2AAA] = 0x0055;	s_addr[0x5555] = 0x0090;	value = s_addr[0];	value = value|(value<<16);	switch (value) {	case AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD;		break;	case FUJ_MANUFACT:		info->flash_id = FLASH_MAN_FUJ;		break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		return (0);			/* no or unknown flash	*/	}	value = s_addr[1];	value = value|(value<<16);		switch (value) {	case FUJI_ID_29F800BA:		info->flash_id += FLASH_AM400T;		info->sector_count = 19;		info->size = 0x00100000;		break;				/* => 1 MB		*/	case AMD_ID_LV800T:		info->flash_id += FLASH_AM800T;		info->sector_count = 19;		info->size = 0x00100000;		break;				/* => 1 MB		*/	case AMD_ID_LV800B:		info->flash_id += FLASH_AM800B;		info->sector_count = 19;		info->size = 0x00100000;		break;				/* => 1 MB		*/	default:		info->flash_id = FLASH_UNKNOWN;		return (0);			/* => no or unknown flash */	}	/* set up sector start address table */	/* 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;	}	/* 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 */		s_addr = (volatile unsigned short *)(info->start[i]);		info->protect[i] = s_addr[2] & 1;	}	/*	 * Prevent writes to uninitialized FLASH.	 */	if (info->flash_id != FLASH_UNKNOWN) {		s_addr = (volatile unsigned short *)info->start[0];		*s_addr = 0x00F0;	/* 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;	ulong start, now, last;#ifdef CONFIG_FLASH_16BIT	vu_short *s_addr = (vu_short*)addr;#endif	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;	}/*#ifndef CONFIG_FLASH_16BIT	ulong type;	type = (info->flash_id & FLASH_VENDMASK);	if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {		printf ("Can't erase unknown flash type %08lx - aborted\n",			info->flash_id);		return;	}#endif*/	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 */#ifdef CONFIG_FLASH_16BIT			vu_short *s_sect_addr = (vu_short*)(info->start[sect]);#else			vu_long	*sect_addr = (vu_long*)(info->start[sect]);#endif			/* Disable interrupts which might cause a timeout here */			flag = disable_interrupts();#ifdef CONFIG_FLASH_16BIT			/*printf("\ns_sect_addr=%x",s_sect_addr);*/			s_addr[0x5555] = 0x00AA;			s_addr[0x2AAA] = 0x0055;			s_addr[0x5555] = 0x0080;			s_addr[0x5555] = 0x00AA;			s_addr[0x2AAA] = 0x0055;			s_sect_addr[0] = 0x0030;#else			addr[0x5555] = 0x00AA00AA;			addr[0x2AAA] = 0x00550055;			addr[0x5555] = 0x00800080;			addr[0x5555] = 0x00AA00AA;			addr[0x2AAA] = 0x00550055;			sect_addr[0] = 0x00300030;#endif			/* re-enable interrupts if necessary */			if (flag)				enable_interrupts();			/* wait at least 80us - let's wait 1 ms */			udelay (1000);#ifdef CONFIG_FLASH_16BIT			while ((s_sect_addr[0] & 0x0080) != 0x0080) {#else			while ((sect_addr[0] & 0x00800080) != 0x00800080) {#endif				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;				}			}		}	}	/* reset to read mode */	addr = (volatile unsigned long *)info->start[0];#ifdef CONFIG_FLASH_16BIT	s_addr[0] = 0x00F0;	/* reset bank */#else	addr[0] = 0x00F000F0;	/* reset bank */#endif	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]);#ifdef CONFIG_FLASH_16BIT	vu_short high_data;	vu_short low_data;	vu_short *s_addr = (vu_short*)addr;#endif	ulong start;	int flag;	/* Check if Flash is (sufficiently) erased */	if ((*((vu_long *)dest) & data) != data) {		return (2);	}#ifdef CONFIG_FLASH_16BIT	/* Write the 16 higher-bits */	/* Disable interrupts which might cause a timeout here */	flag = disable_interrupts();	high_data = ((data>>16) & 0x0000ffff);	s_addr[0x5555] = 0x00AA;	s_addr[0x2AAA] = 0x0055;	s_addr[0x5555] = 0x00A0;	*((vu_short *)dest) = high_data;	/* re-enable interrupts if necessary */	if (flag)		enable_interrupts();	/* data polling for D7 */	start = get_timer (0);	while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {			return (1);		}	}	/* Write the 16 lower-bits */#endif	/* Disable interrupts which might cause a timeout here */	flag = disable_interrupts();#ifdef CONFIG_FLASH_16BIT	dest += 0x2;	low_data = (data & 0x0000ffff);	s_addr[0x5555] = 0x00AA;	s_addr[0x2AAA] = 0x0055;	s_addr[0x5555] = 0x00A0;	*((vu_short *)dest) = low_data;#else	addr[0x5555] = 0x00AA00AA;	addr[0x2AAA] = 0x00550055;	addr[0x5555] = 0x00A000A0;	*((vu_long *)dest) = data;#endif	/* re-enable interrupts if necessary */	if (flag)		enable_interrupts();	/* data polling for D7 */	start = get_timer (0);#ifdef CONFIG_FLASH_16BIT	while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {#else	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {#endif		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {			return (1);		}	}	return (0);}