info->sector_count = 32;		info->size = 0x00200000;		break;				/* => 2 MB		*/	case (CFG_FLASH_WORD_SIZE)SST_ID_xF3201:	case (CFG_FLASH_WORD_SIZE)SST_ID_xF3202:		info->flash_id += FLASH_SST320;		info->sector_count = 64;		info->size = 0x00400000;		break;				/* => 4 MB		*/	case (CFG_FLASH_WORD_SIZE)SST_ID_xF6401:	case (CFG_FLASH_WORD_SIZE)SST_ID_xF6402:		info->flash_id += FLASH_SST640;		info->sector_count = 128;		info->size = 0x00800000;		break;				/* => 8 MB		*/#endif	default:		info->flash_id = FLASH_UNKNOWN;		return (0);			/* => no or unknown flash */	}	/* set up sector start address table */	if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||	    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {	    for (i = 0; i < info->sector_count; i++)		info->start[i] = base + (i * 0x00010000);	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {		/* set sector offsets for bottom boot block type	*/		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/			info->start[i] = base;			base += 8 << 10;		}		while (i < info->sector_count) {	/* 64k regular sectors	*/			info->start[i] = base;			base += 64 << 10;			++i;		}	} else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||		   ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {		/* set sector offsets for top boot block type		*/		base += info->size;		i = info->sector_count;		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/			base -= 8 << 10;			--i;			info->start[i] = base;		}		while (i > 0) {			/* 64k regular sectors	*/			base -= 64 << 10;			--i;			info->start[i] = base;		}	} else {	    if (info->flash_id & FLASH_BTYPE) {		/* 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;		}	    } else {		/* set sector offsets for top boot block type		*/		i = info->sector_count - 1;		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;		}	    }	}	/* 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 */		addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);		if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)		  info->protect[i] = 0;		else		  info->protect[i] = addr2[CFG_FLASH_READ2] & 1;	}	/*	 * Prevent writes to uninitialized FLASH.	 */	if (info->flash_id != FLASH_UNKNOWN) {		addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];		*addr2 = (CFG_FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */	}	return (info->size);}/*----------------------------------------------------------------------- */int	flash_erase (flash_info_t *info, int s_first, int s_last){	volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);	volatile CFG_FLASH_WORD_SIZE *addr2;	int flag, prot, sect, l_sect;	ulong start, now, last;	int i;	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) {		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();	/* Start erase on unprotected sectors */	for (sect = s_first; sect<=s_last; sect++) {		if (info->protect[sect] == 0) {	/* not protected */		    addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);		    if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;			addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;			addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;			addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;  /* block erase */			for (i=0; i<50; i++)			  udelay(1000);  /* wait 1 ms */		    } else {			if (sect == s_first) {			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;			    addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;			    addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;			    addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;			}			addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */		    }		    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 = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);	while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_FLASH_WORD_SIZE)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 = (CFG_FLASH_WORD_SIZE *)info->start[0];	addr[0] = (CFG_FLASH_WORD_SIZE)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){	volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);	volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;	volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;	ulong start;	int flag;	int i;	/* 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();	for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++)	  {	    addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;	    addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;	    addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00A000A0;	    dest2[i] = data2[i];	    /* re-enable interrupts if necessary */	    if (flag)	      enable_interrupts();	    /* data polling for D7 */	    start = get_timer (0);	    while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x00800080) !=		   (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {	      if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {		return (1);	      }	    }	  }	return (0);}/*----------------------------------------------------------------------- */