/* * (C) Copyright 2000-2006 * 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 <flash.h>extern flash_info_t  flash_info[]; /* info for FLASH chips *//*----------------------------------------------------------------------- * Functions *//*----------------------------------------------------------------------- * Set protection status for monitor sectors * * The monitor is always located in the _first_ Flash bank. * If necessary you have to map the second bank at lower addresses. */voidflash_protect (int flag, ulong from, ulong to, flash_info_t *info){	ulong b_end = info->start[0] + info->size - 1;	/* bank end address */	short s_end = info->sector_count - 1;	/* index of last sector */	int i;	/* Do nothing if input data is bad. */	if (info->sector_count == 0 || info->size == 0 || to < from) {		return;	}	/* There is nothing to do if we have no data about the flash	 * or the protect range and flash range don't overlap.	 */	if (info->flash_id == FLASH_UNKNOWN ||	    to < info->start[0] || from > b_end) {		return;	}	for (i=0; i<info->sector_count; ++i) {		ulong end;		/* last address in current sect	*/		end = (i == s_end) ? b_end : info->start[i + 1] - 1;		/* Update protection if any part of the sector		 * is in the specified range.		 */		if (from <= end && to >= info->start[i]) {			if (flag & FLAG_PROTECT_CLEAR) {#if defined(CFG_FLASH_PROTECTION)				flash_real_protect(info, i, 0);#else				info->protect[i] = 0;#endif	/* CFG_FLASH_PROTECTION */			}			else if (flag & FLAG_PROTECT_SET) {#if defined(CFG_FLASH_PROTECTION)				flash_real_protect(info, i, 1);#else				info->protect[i] = 1;#endif	/* CFG_FLASH_PROTECTION */			}		}	}}/*----------------------------------------------------------------------- */flash_info_t *addr2info (ulong addr){#ifndef CONFIG_SPD823TS	flash_info_t *info;	int i;	for (i=0, info = &flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {		if (info->flash_id != FLASH_UNKNOWN &&		    addr >= info->start[0] &&		    /* WARNING - The '- 1' is needed if the flash		     * is at the end of the address space, since		     * info->start[0] + info->size wraps back to 0.		     * Please don't change this unless you understand this.		     */		    addr <= info->start[0] + info->size - 1) {			return (info);		}	}#endif /* CONFIG_SPD823TS */	return (NULL);}/*----------------------------------------------------------------------- * Copy memory to flash. * Make sure all target addresses are within Flash bounds, * and no protected sectors are hit. * Returns: * ERR_OK          0 - OK * ERR_TIMOUT      1 - write timeout * ERR_NOT_ERASED  2 - Flash not erased * ERR_PROTECTED   4 - target range includes protected sectors * ERR_INVAL       8 - target address not in Flash memory * ERR_ALIGN       16 - target address not aligned on boundary *			(only some targets require alignment) */intflash_write (char *src, ulong addr, ulong cnt){#ifdef CONFIG_SPD823TS	return (ERR_TIMOUT);	/* any other error codes are possible as well */#else	int i;	ulong         end        = addr + cnt - 1;	flash_info_t *info_first = addr2info (addr);	flash_info_t *info_last  = addr2info (end );	flash_info_t *info;	int j;	if (cnt == 0) {		return (ERR_OK);	}	if (!info_first || !info_last) {		return (ERR_INVAL);	}	for (info = info_first; info <= info_last; ++info) {		ulong b_end = info->start[0] + info->size;	/* bank end addr */		short s_end = info->sector_count - 1;		for (i=0; i<info->sector_count; ++i) {			ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];			if ((end >= info->start[i]) && (addr < e_addr) &&			    (info->protect[i] != 0) ) {				return (ERR_PROTECTED);			}		}	}	printf("\rWriting ");	for (j=0; j<20; j++) putc(177);	printf("\rWriting ");	/* finally write data to flash */	for (info = info_first; info <= info_last && cnt>0; ++info) {		ulong len;		len = info->start[0] + info->size - addr;		if (len > cnt)			len = cnt;		if ((i = write_buff(info, src, addr, len)) != 0) {			return (i);		}		cnt  -= len;		addr += len;		src  += len;	}	return (ERR_OK);#endif /* CONFIG_SPD823TS */}/*----------------------------------------------------------------------- */