229 lines
6.0 KiB
C
229 lines
6.0 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <flash.h>
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#if !defined(CFG_NO_FLASH)
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extern flash_info_t flash_info[]; /* info for FLASH chips */
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/*-----------------------------------------------------------------------
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* Functions
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*/
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/*-----------------------------------------------------------------------
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* Set protection status for monitor sectors
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*
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* The monitor is always located in the _first_ Flash bank.
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* If necessary you have to map the second bank at lower addresses.
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*/
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void
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flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
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{
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ulong b_end = info->start[0] + info->size - 1; /* bank end address */
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short s_end = info->sector_count - 1; /* index of last sector */
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int i;
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debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
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(flag & FLAG_PROTECT_SET) ? "ON" :
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(flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
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from, to);
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/* Do nothing if input data is bad. */
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if (info->sector_count == 0 || info->size == 0 || to < from) {
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return;
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}
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/* There is nothing to do if we have no data about the flash
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* or the protect range and flash range don't overlap.
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*/
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if (info->flash_id == FLASH_UNKNOWN ||
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to < info->start[0] || from > b_end) {
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return;
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}
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for (i=0; i<info->sector_count; ++i) {
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ulong end; /* last address in current sect */
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end = (i == s_end) ? b_end : info->start[i + 1] - 1;
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/* Update protection if any part of the sector
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* is in the specified range.
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*/
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if (from <= end && to >= info->start[i]) {
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if (flag & FLAG_PROTECT_CLEAR) {
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#if defined(CFG_FLASH_PROTECTION)
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flash_real_protect(info, i, 0);
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#else
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info->protect[i] = 0;
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#endif /* CFG_FLASH_PROTECTION */
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debug ("protect off %d\n", i);
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}
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else if (flag & FLAG_PROTECT_SET) {
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#if defined(CFG_FLASH_PROTECTION)
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flash_real_protect(info, i, 1);
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#else
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info->protect[i] = 1;
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#endif /* CFG_FLASH_PROTECTION */
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debug ("protect on %d\n", i);
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}
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}
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}
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}
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/*-----------------------------------------------------------------------
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*/
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flash_info_t *
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addr2info (ulong addr)
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{
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#ifndef CONFIG_SPD823TS
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flash_info_t *info;
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int i;
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for (i=0, info=&flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {
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if (info->flash_id != FLASH_UNKNOWN &&
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addr >= info->start[0] &&
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/* WARNING - The '- 1' is needed if the flash
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* is at the end of the address space, since
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* info->start[0] + info->size wraps back to 0.
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* Please don't change this unless you understand this.
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*/
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addr <= info->start[0] + info->size - 1) {
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return (info);
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}
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}
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#endif /* CONFIG_SPD823TS */
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return (NULL);
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}
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/*-----------------------------------------------------------------------
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* Copy memory to flash.
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* Make sure all target addresses are within Flash bounds,
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* and no protected sectors are hit.
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* Returns:
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* ERR_OK 0 - OK
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* ERR_TIMOUT 1 - write timeout
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* ERR_NOT_ERASED 2 - Flash not erased
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* ERR_PROTECTED 4 - target range includes protected sectors
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* ERR_INVAL 8 - target address not in Flash memory
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* ERR_ALIGN 16 - target address not aligned on boundary
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* (only some targets require alignment)
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*/
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int
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flash_write (char *src, ulong addr, ulong cnt)
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{
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#ifdef CONFIG_SPD823TS
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return (ERR_TIMOUT); /* any other error codes are possible as well */
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#else
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int i;
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ulong end = addr + cnt - 1;
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flash_info_t *info_first = addr2info (addr);
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flash_info_t *info_last = addr2info (end );
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flash_info_t *info;
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if (cnt == 0) {
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return (ERR_OK);
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}
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if (!info_first || !info_last) {
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return (ERR_INVAL);
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}
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for (info = info_first; info <= info_last; ++info) {
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ulong b_end = info->start[0] + info->size; /* bank end addr */
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short s_end = info->sector_count - 1;
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for (i=0; i<info->sector_count; ++i) {
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ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
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if ((end >= info->start[i]) && (addr < e_addr) &&
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(info->protect[i] != 0) ) {
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return (ERR_PROTECTED);
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}
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}
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}
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/* finally write data to flash */
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for (info = info_first; info <= info_last && cnt>0; ++info) {
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ulong len;
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len = info->start[0] + info->size - addr;
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if (len > cnt)
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len = cnt;
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if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
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return (i);
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}
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cnt -= len;
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addr += len;
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src += len;
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}
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return (ERR_OK);
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#endif /* CONFIG_SPD823TS */
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}
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/*-----------------------------------------------------------------------
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*/
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void flash_perror (int err)
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{
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switch (err) {
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case ERR_OK:
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break;
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case ERR_TIMOUT:
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puts ("Timeout writing to Flash\n");
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break;
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case ERR_NOT_ERASED:
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puts ("Flash not Erased\n");
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break;
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case ERR_PROTECTED:
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puts ("Can't write to protected Flash sectors\n");
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break;
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case ERR_INVAL:
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puts ("Outside available Flash\n");
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break;
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case ERR_ALIGN:
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puts ("Start and/or end address not on sector boundary\n");
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break;
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case ERR_UNKNOWN_FLASH_VENDOR:
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puts ("Unknown Vendor of Flash\n");
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break;
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case ERR_UNKNOWN_FLASH_TYPE:
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puts ("Unknown Type of Flash\n");
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break;
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case ERR_PROG_ERROR:
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puts ("General Flash Programming Error\n");
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break;
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default:
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printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
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break;
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}
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}
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/*-----------------------------------------------------------------------
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*/
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#endif /* !CFG_NO_FLASH */
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