/* * (C) Copyright 2000 * 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 <flash.h> #if !defined(CFG_NO_FLASH) extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* 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. */ void flash_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; debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n", (flag & FLAG_PROTECT_SET) ? "ON" : (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???", from, to); /* 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 */ debug ("protect off %d\n", i); } 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 */ debug ("protect on %d\n", i); } } } } /*----------------------------------------------------------------------- */ 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) */ int flash_write (uchar *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; 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); } } } /* 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 */ } /*----------------------------------------------------------------------- */ void flash_perror (int err) { switch (err) { case ERR_OK: break; case ERR_TIMOUT: puts ("Timeout writing to Flash\n"); break; case ERR_NOT_ERASED: puts ("Flash not Erased\n"); break; case ERR_PROTECTED: puts ("Can't write to protected Flash sectors\n"); break; case ERR_INVAL: puts ("Outside available Flash\n"); break; case ERR_ALIGN: puts ("Start and/or end address not on sector boundary\n"); break; case ERR_UNKNOWN_FLASH_VENDOR: puts ("Unknown Vendor of Flash\n"); break; case ERR_UNKNOWN_FLASH_TYPE: puts ("Unknown Type of Flash\n"); break; case ERR_PROG_ERROR: puts ("General Flash Programming Error\n"); break; default: printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err); break; } } /*----------------------------------------------------------------------- */ #endif /* !CFG_NO_FLASH */