info->size = 0;		return (0);			/* no or unknown flash	*/	}	value = addr[1];			/* device ID		*/	DEBUGF("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);	switch (value) {	case AMD_ID_F040B:		info->flash_id += FLASH_AM040;		info->sector_count = 8;		info->size = 0x00200000;		break;				/* => 2 MB		*/	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_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		*/#if 0	/* enable when device IDs are available */	case AMD_ID_LV320T:		info->flash_id += FLASH_AM320T;		info->sector_count = 67;		info->size = 0x00800000;		break;				/* => 8 MB		*/	case AMD_ID_LV320B:		info->flash_id += FLASH_AM320B;		info->sector_count = 67;		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_BTYPE) {		/* set sector offsets for bottom boot block type	*/		info->start[0] = base + 0x00000000;		info->start[1] = base + 0x00008000;		info->start[2] = base + 0x0000C000;		info->start[3] = base + 0x00010000;		for (i = 4; i < info->sector_count; i++) {			info->start[i] = base + (i * 0x00020000) - 0x00060000;		}	} else {		/* set sector offsets for 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;		}	}	/* 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;	}	/*	 * 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;	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);}/*----------------------------------------------------------------------- */