863 lines
22 KiB
C
863 lines
22 KiB
C
/*
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* drivers/nand/nand_util.c
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*
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* Copyright (C) 2006 by Weiss-Electronic GmbH.
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* All rights reserved.
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*
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* @author: Guido Classen <clagix@gmail.com>
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* @descr: NAND Flash support
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* @references: borrowed heavily from Linux mtd-utils code:
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* flash_eraseall.c by Arcom Control System Ltd
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* nandwrite.c by Steven J. Hill (sjhill@realitydiluted.com)
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* and Thomas Gleixner (tglx@linutronix.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 version
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* 2 as published by the Free Software Foundation.
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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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*/
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#include <common.h>
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#if (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
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#include <command.h>
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#include <watchdog.h>
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#include <malloc.h>
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#include <nand.h>
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#include <jffs2/jffs2.h>
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typedef struct erase_info erase_info_t;
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typedef struct mtd_info mtd_info_t;
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/* support only for native endian JFFS2 */
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#define cpu_to_je16(x) (x)
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#define cpu_to_je32(x) (x)
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/*****************************************************************************/
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static int nand_block_bad_scrub(struct mtd_info *mtd, loff_t ofs, int getchip)
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{
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return 0;
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}
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/**
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* nand_erase_opts: - erase NAND flash with support for various options
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* (jffs2 formating)
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*
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* @param meminfo NAND device to erase
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* @param opts options, @see struct nand_erase_options
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* @return 0 in case of success
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*
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* This code is ported from flash_eraseall.c from Linux mtd utils by
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* Arcom Control System Ltd.
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*/
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int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts)
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{
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struct jffs2_unknown_node cleanmarker;
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int clmpos = 0;
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int clmlen = 8;
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erase_info_t erase;
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ulong erase_length;
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int isNAND;
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int bbtest = 1;
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int result;
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int percent_complete = -1;
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int (*nand_block_bad_old)(struct mtd_info *, loff_t, int) = NULL;
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const char *mtd_device = meminfo->name;
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memset(&erase, 0, sizeof(erase));
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erase.mtd = meminfo;
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erase.len = meminfo->erasesize;
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erase.addr = opts->offset;
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erase_length = opts->length;
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isNAND = meminfo->type == MTD_NANDFLASH ? 1 : 0;
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if (opts->jffs2) {
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cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
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cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
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if (isNAND) {
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struct nand_oobinfo *oobinfo = &meminfo->oobinfo;
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/* check for autoplacement */
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if (oobinfo->useecc == MTD_NANDECC_AUTOPLACE) {
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/* get the position of the free bytes */
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if (!oobinfo->oobfree[0][1]) {
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printf(" Eeep. Autoplacement selected "
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"and no empty space in oob\n");
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return -1;
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}
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clmpos = oobinfo->oobfree[0][0];
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clmlen = oobinfo->oobfree[0][1];
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if (clmlen > 8)
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clmlen = 8;
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} else {
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/* legacy mode */
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switch (meminfo->oobsize) {
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case 8:
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clmpos = 6;
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clmlen = 2;
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break;
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case 16:
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clmpos = 8;
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clmlen = 8;
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break;
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case 64:
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clmpos = 16;
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clmlen = 8;
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break;
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}
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}
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cleanmarker.totlen = cpu_to_je32(8);
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} else {
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cleanmarker.totlen =
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cpu_to_je32(sizeof(struct jffs2_unknown_node));
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}
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cleanmarker.hdr_crc = cpu_to_je32(
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crc32_no_comp(0, (unsigned char *) &cleanmarker,
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sizeof(struct jffs2_unknown_node) - 4));
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}
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/* scrub option allows to erase badblock. To prevent internal
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* check from erase() method, set block check method to dummy
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* and disable bad block table while erasing.
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*/
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if (opts->scrub) {
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struct nand_chip *priv_nand = meminfo->priv;
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nand_block_bad_old = priv_nand->block_bad;
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priv_nand->block_bad = nand_block_bad_scrub;
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/* we don't need the bad block table anymore...
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* after scrub, there are no bad blocks left!
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*/
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if (priv_nand->bbt) {
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kfree(priv_nand->bbt);
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}
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priv_nand->bbt = NULL;
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}
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for (;
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erase.addr < opts->offset + erase_length;
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erase.addr += meminfo->erasesize) {
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WATCHDOG_RESET ();
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if (!opts->scrub && bbtest) {
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int ret = meminfo->block_isbad(meminfo, erase.addr);
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if (ret > 0) {
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if (!opts->quiet)
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printf("\rSkipping bad block at "
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"0x%08x "
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" \n",
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erase.addr);
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continue;
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} else if (ret < 0) {
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printf("\n%s: MTD get bad block failed: %d\n",
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mtd_device,
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ret);
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return -1;
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}
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}
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result = meminfo->erase(meminfo, &erase);
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if (result != 0) {
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printf("\n%s: MTD Erase failure: %d\n",
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mtd_device, result);
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continue;
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}
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/* format for JFFS2 ? */
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if (opts->jffs2) {
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/* write cleanmarker */
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if (isNAND) {
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size_t written;
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result = meminfo->write_oob(meminfo,
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erase.addr + clmpos,
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clmlen,
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&written,
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(unsigned char *)
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&cleanmarker);
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if (result != 0) {
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printf("\n%s: MTD writeoob failure: %d\n",
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mtd_device, result);
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continue;
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}
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} else {
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printf("\n%s: this erase routine only supports"
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" NAND devices!\n",
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mtd_device);
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}
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}
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if (!opts->quiet) {
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int percent = (int)
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((unsigned long long)
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(erase.addr+meminfo->erasesize-opts->offset)
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* 100 / erase_length);
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/* output progress message only at whole percent
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* steps to reduce the number of messages printed
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* on (slow) serial consoles
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*/
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if (percent != percent_complete) {
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percent_complete = percent;
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printf("\rErasing at 0x%x -- %3d%% complete.",
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erase.addr, percent);
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if (opts->jffs2 && result == 0)
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printf(" Cleanmarker written at 0x%x.",
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erase.addr);
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}
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}
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}
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if (!opts->quiet)
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printf("\n");
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if (nand_block_bad_old) {
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struct nand_chip *priv_nand = meminfo->priv;
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priv_nand->block_bad = nand_block_bad_old;
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priv_nand->scan_bbt(meminfo);
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}
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return 0;
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}
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#define MAX_PAGE_SIZE 2048
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#define MAX_OOB_SIZE 64
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/*
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* buffer array used for writing data
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*/
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static unsigned char data_buf[MAX_PAGE_SIZE];
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static unsigned char oob_buf[MAX_OOB_SIZE];
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/* OOB layouts to pass into the kernel as default */
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static struct nand_oobinfo none_oobinfo = {
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.useecc = MTD_NANDECC_OFF,
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};
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static struct nand_oobinfo jffs2_oobinfo = {
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.useecc = MTD_NANDECC_PLACE,
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.eccbytes = 6,
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.eccpos = { 0, 1, 2, 3, 6, 7 }
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};
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static struct nand_oobinfo yaffs_oobinfo = {
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.useecc = MTD_NANDECC_PLACE,
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.eccbytes = 6,
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.eccpos = { 8, 9, 10, 13, 14, 15}
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};
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static struct nand_oobinfo autoplace_oobinfo = {
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.useecc = MTD_NANDECC_AUTOPLACE
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};
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/**
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* nand_write_opts: - write image to NAND flash with support for various options
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*
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* @param meminfo NAND device to erase
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* @param opts write options (@see nand_write_options)
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* @return 0 in case of success
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*
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* This code is ported from nandwrite.c from Linux mtd utils by
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* Steven J. Hill and Thomas Gleixner.
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*/
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int nand_write_opts(nand_info_t *meminfo, const nand_write_options_t *opts)
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{
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int imglen = 0;
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int pagelen;
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int baderaseblock;
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int blockstart = -1;
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loff_t offs;
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int readlen;
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int oobinfochanged = 0;
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int percent_complete = -1;
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struct nand_oobinfo old_oobinfo;
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ulong mtdoffset = opts->offset;
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ulong erasesize_blockalign;
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u_char *buffer = opts->buffer;
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size_t written;
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int result;
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if (opts->pad && opts->writeoob) {
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printf("Can't pad when oob data is present.\n");
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return -1;
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}
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/* set erasesize to specified number of blocks - to match
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* jffs2 (virtual) block size */
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if (opts->blockalign == 0) {
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erasesize_blockalign = meminfo->erasesize;
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} else {
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erasesize_blockalign = meminfo->erasesize * opts->blockalign;
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}
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/* make sure device page sizes are valid */
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if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
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&& !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
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&& !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
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printf("Unknown flash (not normal NAND)\n");
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return -1;
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}
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/* read the current oob info */
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memcpy(&old_oobinfo, &meminfo->oobinfo, sizeof(old_oobinfo));
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/* write without ecc? */
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if (opts->noecc) {
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memcpy(&meminfo->oobinfo, &none_oobinfo,
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sizeof(meminfo->oobinfo));
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oobinfochanged = 1;
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}
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/* autoplace ECC? */
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if (opts->autoplace && (old_oobinfo.useecc != MTD_NANDECC_AUTOPLACE)) {
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memcpy(&meminfo->oobinfo, &autoplace_oobinfo,
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sizeof(meminfo->oobinfo));
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oobinfochanged = 1;
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}
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/* force OOB layout for jffs2 or yaffs? */
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if (opts->forcejffs2 || opts->forceyaffs) {
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struct nand_oobinfo *oobsel =
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opts->forcejffs2 ? &jffs2_oobinfo : &yaffs_oobinfo;
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if (meminfo->oobsize == 8) {
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if (opts->forceyaffs) {
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printf("YAFSS cannot operate on "
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"256 Byte page size\n");
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goto restoreoob;
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}
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/* Adjust number of ecc bytes */
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jffs2_oobinfo.eccbytes = 3;
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}
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memcpy(&meminfo->oobinfo, oobsel, sizeof(meminfo->oobinfo));
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}
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/* get image length */
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imglen = opts->length;
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pagelen = meminfo->oobblock
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+ ((opts->writeoob != 0) ? meminfo->oobsize : 0);
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/* check, if file is pagealigned */
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if ((!opts->pad) && ((imglen % pagelen) != 0)) {
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printf("Input block length is not page aligned\n");
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goto restoreoob;
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}
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/* check, if length fits into device */
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if (((imglen / pagelen) * meminfo->oobblock)
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> (meminfo->size - opts->offset)) {
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printf("Image %d bytes, NAND page %d bytes, "
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"OOB area %u bytes, device size %u bytes\n",
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imglen, pagelen, meminfo->oobblock, meminfo->size);
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printf("Input block does not fit into device\n");
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goto restoreoob;
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}
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if (!opts->quiet)
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printf("\n");
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/* get data from input and write to the device */
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while (imglen && (mtdoffset < meminfo->size)) {
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WATCHDOG_RESET ();
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/*
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* new eraseblock, check for bad block(s). Stay in the
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* loop to be sure if the offset changes because of
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* a bad block, that the next block that will be
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* written to is also checked. Thus avoiding errors if
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* the block(s) after the skipped block(s) is also bad
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* (number of blocks depending on the blockalign
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*/
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while (blockstart != (mtdoffset & (~erasesize_blockalign+1))) {
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blockstart = mtdoffset & (~erasesize_blockalign+1);
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offs = blockstart;
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baderaseblock = 0;
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/* check all the blocks in an erase block for
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* bad blocks */
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do {
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int ret = meminfo->block_isbad(meminfo, offs);
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if (ret < 0) {
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printf("Bad block check failed\n");
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goto restoreoob;
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}
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if (ret == 1) {
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baderaseblock = 1;
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if (!opts->quiet)
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printf("\rBad block at 0x%lx "
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"in erase block from "
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"0x%x will be skipped\n",
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(long) offs,
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blockstart);
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}
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if (baderaseblock) {
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mtdoffset = blockstart
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+ erasesize_blockalign;
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}
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offs += erasesize_blockalign
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/ opts->blockalign;
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} while (offs < blockstart + erasesize_blockalign);
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}
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readlen = meminfo->oobblock;
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if (opts->pad && (imglen < readlen)) {
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readlen = imglen;
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memset(data_buf + readlen, 0xff,
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meminfo->oobblock - readlen);
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}
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/* read page data from input memory buffer */
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memcpy(data_buf, buffer, readlen);
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buffer += readlen;
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if (opts->writeoob) {
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/* read OOB data from input memory block, exit
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* on failure */
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memcpy(oob_buf, buffer, meminfo->oobsize);
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buffer += meminfo->oobsize;
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/* write OOB data first, as ecc will be placed
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* in there*/
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result = meminfo->write_oob(meminfo,
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mtdoffset,
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meminfo->oobsize,
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&written,
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(unsigned char *)
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&oob_buf);
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if (result != 0) {
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printf("\nMTD writeoob failure: %d\n",
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result);
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goto restoreoob;
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}
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imglen -= meminfo->oobsize;
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}
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/* write out the page data */
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result = meminfo->write(meminfo,
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mtdoffset,
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meminfo->oobblock,
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&written,
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(unsigned char *) &data_buf);
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if (result != 0) {
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printf("writing NAND page at offset 0x%lx failed\n",
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mtdoffset);
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goto restoreoob;
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}
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imglen -= readlen;
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if (!opts->quiet) {
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int percent = (int)
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((unsigned long long)
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(opts->length-imglen) * 100
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/ opts->length);
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/* output progress message only at whole percent
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* steps to reduce the number of messages printed
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* on (slow) serial consoles
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*/
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if (percent != percent_complete) {
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printf("\rWriting data at 0x%x "
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"-- %3d%% complete.",
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mtdoffset, percent);
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percent_complete = percent;
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}
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}
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mtdoffset += meminfo->oobblock;
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}
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if (!opts->quiet)
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printf("\n");
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restoreoob:
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if (oobinfochanged) {
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memcpy(&meminfo->oobinfo, &old_oobinfo,
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sizeof(meminfo->oobinfo));
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}
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if (imglen > 0) {
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printf("Data did not fit into device, due to bad blocks\n");
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return -1;
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}
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/* return happy */
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return 0;
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}
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/**
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* nand_read_opts: - read image from NAND flash with support for various options
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*
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* @param meminfo NAND device to erase
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* @param opts read options (@see struct nand_read_options)
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* @return 0 in case of success
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*
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*/
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int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts)
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{
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int imglen = opts->length;
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int pagelen;
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int baderaseblock;
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int blockstart = -1;
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int percent_complete = -1;
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loff_t offs;
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size_t readlen;
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ulong mtdoffset = opts->offset;
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u_char *buffer = opts->buffer;
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int result;
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|
|
|
/* make sure device page sizes are valid */
|
|
if (!(meminfo->oobsize == 16 && meminfo->oobblock == 512)
|
|
&& !(meminfo->oobsize == 8 && meminfo->oobblock == 256)
|
|
&& !(meminfo->oobsize == 64 && meminfo->oobblock == 2048)) {
|
|
printf("Unknown flash (not normal NAND)\n");
|
|
return -1;
|
|
}
|
|
|
|
pagelen = meminfo->oobblock
|
|
+ ((opts->readoob != 0) ? meminfo->oobsize : 0);
|
|
|
|
/* check, if length is not larger than device */
|
|
if (((imglen / pagelen) * meminfo->oobblock)
|
|
> (meminfo->size - opts->offset)) {
|
|
printf("Image %d bytes, NAND page %d bytes, "
|
|
"OOB area %u bytes, device size %u bytes\n",
|
|
imglen, pagelen, meminfo->oobblock, meminfo->size);
|
|
printf("Input block is larger than device\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!opts->quiet)
|
|
printf("\n");
|
|
|
|
/* get data from input and write to the device */
|
|
while (imglen && (mtdoffset < meminfo->size)) {
|
|
|
|
WATCHDOG_RESET ();
|
|
|
|
/*
|
|
* new eraseblock, check for bad block(s). Stay in the
|
|
* loop to be sure if the offset changes because of
|
|
* a bad block, that the next block that will be
|
|
* written to is also checked. Thus avoiding errors if
|
|
* the block(s) after the skipped block(s) is also bad
|
|
* (number of blocks depending on the blockalign
|
|
*/
|
|
while (blockstart != (mtdoffset & (~meminfo->erasesize+1))) {
|
|
blockstart = mtdoffset & (~meminfo->erasesize+1);
|
|
offs = blockstart;
|
|
baderaseblock = 0;
|
|
|
|
/* check all the blocks in an erase block for
|
|
* bad blocks */
|
|
do {
|
|
int ret = meminfo->block_isbad(meminfo, offs);
|
|
|
|
if (ret < 0) {
|
|
printf("Bad block check failed\n");
|
|
return -1;
|
|
}
|
|
if (ret == 1) {
|
|
baderaseblock = 1;
|
|
if (!opts->quiet)
|
|
printf("\rBad block at 0x%lx "
|
|
"in erase block from "
|
|
"0x%x will be skipped\n",
|
|
(long) offs,
|
|
blockstart);
|
|
}
|
|
|
|
if (baderaseblock) {
|
|
mtdoffset = blockstart
|
|
+ meminfo->erasesize;
|
|
}
|
|
offs += meminfo->erasesize;
|
|
|
|
} while (offs < blockstart + meminfo->erasesize);
|
|
}
|
|
|
|
|
|
/* read page data to memory buffer */
|
|
result = meminfo->read(meminfo,
|
|
mtdoffset,
|
|
meminfo->oobblock,
|
|
&readlen,
|
|
(unsigned char *) &data_buf);
|
|
|
|
if (result != 0) {
|
|
printf("reading NAND page at offset 0x%lx failed\n",
|
|
mtdoffset);
|
|
return -1;
|
|
}
|
|
|
|
if (imglen < readlen) {
|
|
readlen = imglen;
|
|
}
|
|
|
|
memcpy(buffer, data_buf, readlen);
|
|
buffer += readlen;
|
|
imglen -= readlen;
|
|
|
|
if (opts->readoob) {
|
|
result = meminfo->read_oob(meminfo,
|
|
mtdoffset,
|
|
meminfo->oobsize,
|
|
&readlen,
|
|
(unsigned char *)
|
|
&oob_buf);
|
|
|
|
if (result != 0) {
|
|
printf("\nMTD readoob failure: %d\n",
|
|
result);
|
|
return -1;
|
|
}
|
|
|
|
|
|
if (imglen < readlen) {
|
|
readlen = imglen;
|
|
}
|
|
|
|
memcpy(buffer, oob_buf, readlen);
|
|
|
|
buffer += readlen;
|
|
imglen -= readlen;
|
|
}
|
|
|
|
if (!opts->quiet) {
|
|
int percent = (int)
|
|
((unsigned long long)
|
|
(opts->length-imglen) * 100
|
|
/ opts->length);
|
|
/* output progress message only at whole percent
|
|
* steps to reduce the number of messages printed
|
|
* on (slow) serial consoles
|
|
*/
|
|
if (percent != percent_complete) {
|
|
if (!opts->quiet)
|
|
printf("\rReading data from 0x%x "
|
|
"-- %3d%% complete.",
|
|
mtdoffset, percent);
|
|
percent_complete = percent;
|
|
}
|
|
}
|
|
|
|
mtdoffset += meminfo->oobblock;
|
|
}
|
|
|
|
if (!opts->quiet)
|
|
printf("\n");
|
|
|
|
if (imglen > 0) {
|
|
printf("Could not read entire image due to bad blocks\n");
|
|
return -1;
|
|
}
|
|
|
|
/* return happy */
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Support for locking / unlocking operations of some NAND devices
|
|
*****************************************************************************/
|
|
|
|
#define NAND_CMD_LOCK 0x2a
|
|
#define NAND_CMD_LOCK_TIGHT 0x2c
|
|
#define NAND_CMD_UNLOCK1 0x23
|
|
#define NAND_CMD_UNLOCK2 0x24
|
|
#define NAND_CMD_LOCK_STATUS 0x7a
|
|
|
|
/**
|
|
* nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT
|
|
* state
|
|
*
|
|
* @param meminfo nand mtd instance
|
|
* @param tight bring device in lock tight mode
|
|
*
|
|
* @return 0 on success, -1 in case of error
|
|
*
|
|
* The lock / lock-tight command only applies to the whole chip. To get some
|
|
* parts of the chip lock and others unlocked use the following sequence:
|
|
*
|
|
* - Lock all pages of the chip using nand_lock(mtd, 0) (or the lockpre pin)
|
|
* - Call nand_unlock() once for each consecutive area to be unlocked
|
|
* - If desired: Bring the chip to the lock-tight state using nand_lock(mtd, 1)
|
|
*
|
|
* If the device is in lock-tight state software can't change the
|
|
* current active lock/unlock state of all pages. nand_lock() / nand_unlock()
|
|
* calls will fail. It is only posible to leave lock-tight state by
|
|
* an hardware signal (low pulse on _WP pin) or by power down.
|
|
*/
|
|
int nand_lock(nand_info_t *meminfo, int tight)
|
|
{
|
|
int ret = 0;
|
|
int status;
|
|
struct nand_chip *this = meminfo->priv;
|
|
|
|
/* select the NAND device */
|
|
this->select_chip(meminfo, 0);
|
|
|
|
this->cmdfunc(meminfo,
|
|
(tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK),
|
|
-1, -1);
|
|
|
|
/* call wait ready function */
|
|
status = this->waitfunc(meminfo, this, FL_WRITING);
|
|
|
|
/* see if device thinks it succeeded */
|
|
if (status & 0x01) {
|
|
ret = -1;
|
|
}
|
|
|
|
/* de-select the NAND device */
|
|
this->select_chip(meminfo, -1);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nand_get_lock_status: - query current lock state from one page of NAND
|
|
* flash
|
|
*
|
|
* @param meminfo nand mtd instance
|
|
* @param offset page address to query (muss be page aligned!)
|
|
*
|
|
* @return -1 in case of error
|
|
* >0 lock status:
|
|
* bitfield with the following combinations:
|
|
* NAND_LOCK_STATUS_TIGHT: page in tight state
|
|
* NAND_LOCK_STATUS_LOCK: page locked
|
|
* NAND_LOCK_STATUS_UNLOCK: page unlocked
|
|
*
|
|
*/
|
|
int nand_get_lock_status(nand_info_t *meminfo, ulong offset)
|
|
{
|
|
int ret = 0;
|
|
int chipnr;
|
|
int page;
|
|
struct nand_chip *this = meminfo->priv;
|
|
|
|
/* select the NAND device */
|
|
chipnr = (int)(offset >> this->chip_shift);
|
|
this->select_chip(meminfo, chipnr);
|
|
|
|
|
|
if ((offset & (meminfo->oobblock - 1)) != 0) {
|
|
printf ("nand_get_lock_status: "
|
|
"Start address must be beginning of "
|
|
"nand page!\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* check the Lock Status */
|
|
page = (int)(offset >> this->page_shift);
|
|
this->cmdfunc(meminfo, NAND_CMD_LOCK_STATUS, -1, page & this->pagemask);
|
|
|
|
ret = this->read_byte(meminfo) & (NAND_LOCK_STATUS_TIGHT
|
|
| NAND_LOCK_STATUS_LOCK
|
|
| NAND_LOCK_STATUS_UNLOCK);
|
|
|
|
out:
|
|
/* de-select the NAND device */
|
|
this->select_chip(meminfo, -1);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nand_unlock: - Unlock area of NAND pages
|
|
* only one consecutive area can be unlocked at one time!
|
|
*
|
|
* @param meminfo nand mtd instance
|
|
* @param start start byte address
|
|
* @param length number of bytes to unlock (must be a multiple of
|
|
* page size nand->oobblock)
|
|
*
|
|
* @return 0 on success, -1 in case of error
|
|
*/
|
|
int nand_unlock(nand_info_t *meminfo, ulong start, ulong length)
|
|
{
|
|
int ret = 0;
|
|
int chipnr;
|
|
int status;
|
|
int page;
|
|
struct nand_chip *this = meminfo->priv;
|
|
printf ("nand_unlock: start: %08x, length: %d!\n",
|
|
(int)start, (int)length);
|
|
|
|
/* select the NAND device */
|
|
chipnr = (int)(start >> this->chip_shift);
|
|
this->select_chip(meminfo, chipnr);
|
|
|
|
/* check the WP bit */
|
|
this->cmdfunc(meminfo, NAND_CMD_STATUS, -1, -1);
|
|
if ((this->read_byte(meminfo) & 0x80) == 0) {
|
|
printf ("nand_unlock: Device is write protected!\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if ((start & (meminfo->oobblock - 1)) != 0) {
|
|
printf ("nand_unlock: Start address must be beginning of "
|
|
"nand page!\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (length == 0 || (length & (meminfo->oobblock - 1)) != 0) {
|
|
printf ("nand_unlock: Length must be a multiple of nand page "
|
|
"size!\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* submit address of first page to unlock */
|
|
page = (int)(start >> this->page_shift);
|
|
this->cmdfunc(meminfo, NAND_CMD_UNLOCK1, -1, page & this->pagemask);
|
|
|
|
/* submit ADDRESS of LAST page to unlock */
|
|
page += (int)(length >> this->page_shift) - 1;
|
|
this->cmdfunc(meminfo, NAND_CMD_UNLOCK2, -1, page & this->pagemask);
|
|
|
|
/* call wait ready function */
|
|
status = this->waitfunc(meminfo, this, FL_WRITING);
|
|
/* see if device thinks it succeeded */
|
|
if (status & 0x01) {
|
|
/* there was an error */
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
/* de-select the NAND device */
|
|
this->select_chip(meminfo, -1);
|
|
return ret;
|
|
}
|
|
|
|
#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY) */
|