2006-10-10 10:36:02 +00:00
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/*
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2007-12-30 02:30:46 +00:00
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* drivers/mtd/nand/nand_util.c
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2006-10-10 10:36:02 +00:00
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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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#include <command.h>
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#include <watchdog.h>
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#include <malloc.h>
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2007-08-02 15:42:08 +00:00
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#include <div64.h>
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2006-10-10 10:36:02 +00:00
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2007-10-31 12:53:06 +00:00
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#include <asm/errno.h>
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#include <linux/mtd/mtd.h>
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2006-10-10 10:36:02 +00:00
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#include <nand.h>
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#include <jffs2/jffs2.h>
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2009-05-11 14:03:55 +00:00
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#if !defined(CONFIG_SYS_64BIT_VSPRINTF)
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#warning Please define CONFIG_SYS_64BIT_VSPRINTF for correct output!
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#endif
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2006-10-10 10:36:02 +00:00
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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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erase_info_t erase;
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ulong erase_length;
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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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2007-10-31 12:53:06 +00:00
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struct mtd_oob_ops oob_opts;
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struct nand_chip *chip = meminfo->priv;
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2006-10-10 10:36:02 +00:00
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memset(&erase, 0, sizeof(erase));
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2007-10-31 12:53:06 +00:00
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memset(&oob_opts, 0, sizeof(oob_opts));
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2006-10-10 10:36:02 +00:00
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erase.mtd = meminfo;
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erase.len = meminfo->erasesize;
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2006-10-28 13:55:52 +00:00
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erase.addr = opts->offset;
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erase_length = opts->length;
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2006-10-10 10:36:02 +00:00
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2007-10-31 12:53:06 +00:00
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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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cleanmarker.totlen = cpu_to_je32(8);
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2006-10-10 10:36:02 +00:00
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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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2008-01-16 13:26:59 +00:00
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if (erase_length < meminfo->erasesize) {
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2008-07-10 08:10:54 +00:00
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printf("Warning: Erase size 0x%08lx smaller than one " \
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2008-01-16 13:26:59 +00:00
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"erase block 0x%08x\n",erase_length, meminfo->erasesize);
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printf(" Erasing 0x%08x instead\n", meminfo->erasesize);
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erase_length = meminfo->erasesize;
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}
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2006-10-10 10:36:02 +00:00
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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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2007-11-08 09:39:53 +00:00
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2006-10-10 10:36:02 +00:00
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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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2009-05-11 14:03:55 +00:00
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"0x%08llx "
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2006-10-12 09:43:47 +00:00
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" \n",
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erase.addr);
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2006-10-10 10:36:02 +00:00
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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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2008-10-29 19:20:26 +00:00
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if (opts->jffs2 && chip->ecc.layout->oobavail >= 8) {
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chip->ops.ooblen = 8;
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2007-10-31 12:53:06 +00:00
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chip->ops.datbuf = NULL;
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2008-10-29 19:20:26 +00:00
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chip->ops.oobbuf = (uint8_t *)&cleanmarker;
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chip->ops.ooboffs = 0;
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chip->ops.mode = MTD_OOB_AUTO;
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2007-11-08 09:39:53 +00:00
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2007-10-31 12:53:06 +00:00
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result = meminfo->write_oob(meminfo,
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2008-10-29 19:20:26 +00:00
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erase.addr,
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&chip->ops);
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2007-10-31 12:53:06 +00:00
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if (result != 0) {
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printf("\n%s: MTD writeoob failure: %d\n",
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2008-10-29 19:20:26 +00:00
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mtd_device, result);
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2007-10-31 12:53:06 +00:00
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continue;
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2006-10-10 10:36:02 +00:00
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}
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}
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if (!opts->quiet) {
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2007-08-13 19:57:53 +00:00
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unsigned long long n =(unsigned long long)
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2007-09-11 15:04:00 +00:00
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(erase.addr + meminfo->erasesize - opts->offset)
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* 100;
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int percent;
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do_div(n, erase_length);
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percent = (int)n;
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2006-10-10 10:36:02 +00:00
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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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2009-05-11 14:03:55 +00:00
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printf("\rErasing at 0x%llx -- %3d%% complete.",
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2008-10-29 19:20:26 +00:00
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erase.addr, percent);
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2006-10-10 10:36:02 +00:00
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if (opts->jffs2 && result == 0)
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2009-05-11 14:03:55 +00:00
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printf(" Cleanmarker written at 0x%llx.",
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2008-10-29 19:20:26 +00:00
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erase.addr);
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2006-10-10 10:36:02 +00:00
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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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2007-10-31 12:53:06 +00:00
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/* XXX U-BOOT XXX */
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#if 0
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2006-10-10 10:36:02 +00:00
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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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2007-10-31 12:53:06 +00:00
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static struct nand_ecclayout none_ecclayout = {
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2006-10-10 10:36:02 +00:00
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.useecc = MTD_NANDECC_OFF,
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};
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2007-10-31 12:53:06 +00:00
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static struct nand_ecclayout jffs2_ecclayout = {
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2006-10-10 10:36:02 +00:00
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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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2007-10-31 12:53:06 +00:00
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static struct nand_ecclayout yaffs_ecclayout = {
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2006-10-10 10:36:02 +00:00
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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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2007-10-31 12:53:06 +00:00
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static struct nand_ecclayout autoplace_ecclayout = {
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2006-10-10 10:36:02 +00:00
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.useecc = MTD_NANDECC_AUTOPLACE
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};
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2007-10-31 12:53:06 +00:00
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#endif
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/* XXX U-BOOT XXX */
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2008-12-13 15:43:06 +00:00
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#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
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2006-10-10 10:36:02 +00:00
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/******************************************************************************
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* Support for locking / unlocking operations of some NAND devices
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*****************************************************************************/
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#define NAND_CMD_LOCK 0x2a
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#define NAND_CMD_LOCK_TIGHT 0x2c
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#define NAND_CMD_UNLOCK1 0x23
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#define NAND_CMD_UNLOCK2 0x24
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#define NAND_CMD_LOCK_STATUS 0x7a
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/**
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* nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT
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* state
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*
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2008-12-13 15:43:06 +00:00
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* @param mtd nand mtd instance
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2006-10-10 10:36:02 +00:00
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* @param tight bring device in lock tight mode
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*
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* @return 0 on success, -1 in case of error
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*
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* The lock / lock-tight command only applies to the whole chip. To get some
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* parts of the chip lock and others unlocked use the following sequence:
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*
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* - Lock all pages of the chip using nand_lock(mtd, 0) (or the lockpre pin)
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* - Call nand_unlock() once for each consecutive area to be unlocked
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* - If desired: Bring the chip to the lock-tight state using nand_lock(mtd, 1)
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*
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* If the device is in lock-tight state software can't change the
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* current active lock/unlock state of all pages. nand_lock() / nand_unlock()
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* calls will fail. It is only posible to leave lock-tight state by
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* an hardware signal (low pulse on _WP pin) or by power down.
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*/
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2008-12-13 15:43:06 +00:00
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int nand_lock(struct mtd_info *mtd, int tight)
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2006-10-10 10:36:02 +00:00
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{
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int ret = 0;
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int status;
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2008-12-13 15:43:06 +00:00
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struct nand_chip *chip = mtd->priv;
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2006-10-10 10:36:02 +00:00
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/* select the NAND device */
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2008-12-13 15:43:06 +00:00
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chip->select_chip(mtd, 0);
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2006-10-10 10:36:02 +00:00
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2008-12-13 15:43:06 +00:00
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chip->cmdfunc(mtd,
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2006-10-10 10:36:02 +00:00
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(tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK),
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-1, -1);
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/* call wait ready function */
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2008-12-13 15:43:06 +00:00
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status = chip->waitfunc(mtd, chip);
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2006-10-10 10:36:02 +00:00
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/* see if device thinks it succeeded */
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if (status & 0x01) {
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ret = -1;
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}
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/* de-select the NAND device */
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2008-12-13 15:43:06 +00:00
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chip->select_chip(mtd, -1);
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2006-10-10 10:36:02 +00:00
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return ret;
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}
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/**
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* nand_get_lock_status: - query current lock state from one page of NAND
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* flash
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*
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2008-12-13 15:43:06 +00:00
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* @param mtd nand mtd instance
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2006-10-10 10:36:02 +00:00
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* @param offset page address to query (muss be page aligned!)
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*
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* @return -1 in case of error
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* >0 lock status:
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* bitfield with the following combinations:
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* NAND_LOCK_STATUS_TIGHT: page in tight state
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* NAND_LOCK_STATUS_LOCK: page locked
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* NAND_LOCK_STATUS_UNLOCK: page unlocked
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*
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*/
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2008-12-13 15:43:06 +00:00
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int nand_get_lock_status(struct mtd_info *mtd, ulong offset)
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2006-10-10 10:36:02 +00:00
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
int chipnr;
|
|
|
|
int page;
|
2008-12-13 15:43:06 +00:00
|
|
|
struct nand_chip *chip = mtd->priv;
|
2006-10-10 10:36:02 +00:00
|
|
|
|
|
|
|
/* select the NAND device */
|
2008-12-13 15:43:06 +00:00
|
|
|
chipnr = (int)(offset >> chip->chip_shift);
|
|
|
|
chip->select_chip(mtd, chipnr);
|
2006-10-10 10:36:02 +00:00
|
|
|
|
|
|
|
|
2008-12-13 15:43:06 +00:00
|
|
|
if ((offset & (mtd->writesize - 1)) != 0) {
|
2006-10-10 10:36:02 +00:00
|
|
|
printf ("nand_get_lock_status: "
|
|
|
|
"Start address must be beginning of "
|
|
|
|
"nand page!\n");
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check the Lock Status */
|
2008-12-13 15:43:06 +00:00
|
|
|
page = (int)(offset >> chip->page_shift);
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask);
|
2006-10-10 10:36:02 +00:00
|
|
|
|
2008-12-13 15:43:06 +00:00
|
|
|
ret = chip->read_byte(mtd) & (NAND_LOCK_STATUS_TIGHT
|
2006-10-10 10:36:02 +00:00
|
|
|
| NAND_LOCK_STATUS_LOCK
|
|
|
|
| NAND_LOCK_STATUS_UNLOCK);
|
|
|
|
|
|
|
|
out:
|
|
|
|
/* de-select the NAND device */
|
2008-12-13 15:43:06 +00:00
|
|
|
chip->select_chip(mtd, -1);
|
2006-10-10 10:36:02 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nand_unlock: - Unlock area of NAND pages
|
|
|
|
* only one consecutive area can be unlocked at one time!
|
|
|
|
*
|
2008-12-13 15:43:06 +00:00
|
|
|
* @param mtd nand mtd instance
|
2006-10-10 10:36:02 +00:00
|
|
|
* @param start start byte address
|
|
|
|
* @param length number of bytes to unlock (must be a multiple of
|
2007-10-31 12:53:06 +00:00
|
|
|
* page size nand->writesize)
|
2006-10-10 10:36:02 +00:00
|
|
|
*
|
|
|
|
* @return 0 on success, -1 in case of error
|
|
|
|
*/
|
2008-12-13 15:43:06 +00:00
|
|
|
int nand_unlock(struct mtd_info *mtd, ulong start, ulong length)
|
2006-10-10 10:36:02 +00:00
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
int chipnr;
|
|
|
|
int status;
|
|
|
|
int page;
|
2008-12-13 15:43:06 +00:00
|
|
|
struct nand_chip *chip = mtd->priv;
|
2006-10-10 10:36:02 +00:00
|
|
|
printf ("nand_unlock: start: %08x, length: %d!\n",
|
|
|
|
(int)start, (int)length);
|
|
|
|
|
|
|
|
/* select the NAND device */
|
2008-12-13 15:43:06 +00:00
|
|
|
chipnr = (int)(start >> chip->chip_shift);
|
|
|
|
chip->select_chip(mtd, chipnr);
|
2006-10-10 10:36:02 +00:00
|
|
|
|
|
|
|
/* check the WP bit */
|
2008-12-13 15:43:06 +00:00
|
|
|
chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
|
|
|
|
if (!(chip->read_byte(mtd) & NAND_STATUS_WP)) {
|
2006-10-10 10:36:02 +00:00
|
|
|
printf ("nand_unlock: Device is write protected!\n");
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2008-12-13 15:43:06 +00:00
|
|
|
if ((start & (mtd->erasesize - 1)) != 0) {
|
2006-10-10 10:36:02 +00:00
|
|
|
printf ("nand_unlock: Start address must be beginning of "
|
2008-12-13 15:43:06 +00:00
|
|
|
"nand block!\n");
|
2006-10-10 10:36:02 +00:00
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2008-12-13 15:43:06 +00:00
|
|
|
if (length == 0 || (length & (mtd->erasesize - 1)) != 0) {
|
|
|
|
printf ("nand_unlock: Length must be a multiple of nand block "
|
|
|
|
"size %08x!\n", mtd->erasesize);
|
2006-10-10 10:36:02 +00:00
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2008-12-13 15:43:06 +00:00
|
|
|
/*
|
|
|
|
* Set length so that the last address is set to the
|
|
|
|
* starting address of the last block
|
|
|
|
*/
|
|
|
|
length -= mtd->erasesize;
|
|
|
|
|
2006-10-10 10:36:02 +00:00
|
|
|
/* submit address of first page to unlock */
|
2008-12-13 15:43:06 +00:00
|
|
|
page = (int)(start >> chip->page_shift);
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_UNLOCK1, -1, page & chip->pagemask);
|
2006-10-10 10:36:02 +00:00
|
|
|
|
|
|
|
/* submit ADDRESS of LAST page to unlock */
|
2008-12-13 15:43:06 +00:00
|
|
|
page += (int)(length >> chip->page_shift);
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, page & chip->pagemask);
|
2006-10-10 10:36:02 +00:00
|
|
|
|
|
|
|
/* call wait ready function */
|
2008-12-13 15:43:06 +00:00
|
|
|
status = chip->waitfunc(mtd, chip);
|
2006-10-10 10:36:02 +00:00
|
|
|
/* see if device thinks it succeeded */
|
|
|
|
if (status & 0x01) {
|
|
|
|
/* there was an error */
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
/* de-select the NAND device */
|
2008-12-13 15:43:06 +00:00
|
|
|
chip->select_chip(mtd, -1);
|
2006-10-10 10:36:02 +00:00
|
|
|
return ret;
|
|
|
|
}
|
2007-10-31 12:53:06 +00:00
|
|
|
#endif
|
2006-10-10 10:36:02 +00:00
|
|
|
|
2008-06-12 18:20:16 +00:00
|
|
|
/**
|
|
|
|
* get_len_incl_bad
|
|
|
|
*
|
|
|
|
* Check if length including bad blocks fits into device.
|
|
|
|
*
|
|
|
|
* @param nand NAND device
|
|
|
|
* @param offset offset in flash
|
|
|
|
* @param length image length
|
|
|
|
* @return image length including bad blocks
|
|
|
|
*/
|
|
|
|
static size_t get_len_incl_bad (nand_info_t *nand, size_t offset,
|
2008-08-14 12:41:06 +00:00
|
|
|
const size_t length)
|
2008-06-12 18:20:16 +00:00
|
|
|
{
|
|
|
|
size_t len_incl_bad = 0;
|
|
|
|
size_t len_excl_bad = 0;
|
|
|
|
size_t block_len;
|
|
|
|
|
|
|
|
while (len_excl_bad < length) {
|
|
|
|
block_len = nand->erasesize - (offset & (nand->erasesize - 1));
|
|
|
|
|
|
|
|
if (!nand_block_isbad (nand, offset & ~(nand->erasesize - 1)))
|
|
|
|
len_excl_bad += block_len;
|
|
|
|
|
|
|
|
len_incl_bad += block_len;
|
|
|
|
offset += block_len;
|
|
|
|
|
|
|
|
if ((offset + len_incl_bad) >= nand->size)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return len_incl_bad;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nand_write_skip_bad:
|
|
|
|
*
|
|
|
|
* Write image to NAND flash.
|
|
|
|
* Blocks that are marked bad are skipped and the is written to the next
|
|
|
|
* block instead as long as the image is short enough to fit even after
|
|
|
|
* skipping the bad blocks.
|
|
|
|
*
|
|
|
|
* @param nand NAND device
|
|
|
|
* @param offset offset in flash
|
|
|
|
* @param length buffer length
|
|
|
|
* @param buf buffer to read from
|
|
|
|
* @return 0 in case of success
|
|
|
|
*/
|
|
|
|
int nand_write_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
|
2008-08-14 12:41:06 +00:00
|
|
|
u_char *buffer)
|
2008-06-12 18:20:16 +00:00
|
|
|
{
|
|
|
|
int rval;
|
|
|
|
size_t left_to_write = *length;
|
|
|
|
size_t len_incl_bad;
|
|
|
|
u_char *p_buffer = buffer;
|
|
|
|
|
|
|
|
/* Reject writes, which are not page aligned */
|
|
|
|
if ((offset & (nand->writesize - 1)) != 0 ||
|
|
|
|
(*length & (nand->writesize - 1)) != 0) {
|
|
|
|
printf ("Attempt to write non page aligned data\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
len_incl_bad = get_len_incl_bad (nand, offset, *length);
|
|
|
|
|
|
|
|
if ((offset + len_incl_bad) >= nand->size) {
|
|
|
|
printf ("Attempt to write outside the flash area\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (len_incl_bad == *length) {
|
|
|
|
rval = nand_write (nand, offset, length, buffer);
|
2008-11-25 16:47:02 +00:00
|
|
|
if (rval != 0)
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("NAND write to offset %zx failed %d\n",
|
2008-08-14 12:41:06 +00:00
|
|
|
offset, rval);
|
2008-11-25 16:47:02 +00:00
|
|
|
|
|
|
|
return rval;
|
2008-06-12 18:20:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
while (left_to_write > 0) {
|
|
|
|
size_t block_offset = offset & (nand->erasesize - 1);
|
|
|
|
size_t write_size;
|
|
|
|
|
|
|
|
if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("Skip bad block 0x%08zx\n",
|
2008-06-12 18:20:16 +00:00
|
|
|
offset & ~(nand->erasesize - 1));
|
|
|
|
offset += nand->erasesize - block_offset;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (left_to_write < (nand->erasesize - block_offset))
|
|
|
|
write_size = left_to_write;
|
|
|
|
else
|
|
|
|
write_size = nand->erasesize - block_offset;
|
|
|
|
|
|
|
|
rval = nand_write (nand, offset, &write_size, p_buffer);
|
|
|
|
if (rval != 0) {
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("NAND write to offset %zx failed %d\n",
|
2008-08-14 12:41:06 +00:00
|
|
|
offset, rval);
|
2008-06-12 18:20:16 +00:00
|
|
|
*length -= left_to_write;
|
|
|
|
return rval;
|
|
|
|
}
|
|
|
|
|
|
|
|
left_to_write -= write_size;
|
|
|
|
offset += write_size;
|
|
|
|
p_buffer += write_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* nand_read_skip_bad:
|
|
|
|
*
|
|
|
|
* Read image from NAND flash.
|
|
|
|
* Blocks that are marked bad are skipped and the next block is readen
|
|
|
|
* instead as long as the image is short enough to fit even after skipping the
|
|
|
|
* bad blocks.
|
|
|
|
*
|
|
|
|
* @param nand NAND device
|
|
|
|
* @param offset offset in flash
|
|
|
|
* @param length buffer length, on return holds remaining bytes to read
|
|
|
|
* @param buffer buffer to write to
|
|
|
|
* @return 0 in case of success
|
|
|
|
*/
|
|
|
|
int nand_read_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
|
|
|
|
u_char *buffer)
|
|
|
|
{
|
|
|
|
int rval;
|
|
|
|
size_t left_to_read = *length;
|
|
|
|
size_t len_incl_bad;
|
|
|
|
u_char *p_buffer = buffer;
|
|
|
|
|
|
|
|
len_incl_bad = get_len_incl_bad (nand, offset, *length);
|
|
|
|
|
|
|
|
if ((offset + len_incl_bad) >= nand->size) {
|
|
|
|
printf ("Attempt to read outside the flash area\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (len_incl_bad == *length) {
|
|
|
|
rval = nand_read (nand, offset, length, buffer);
|
2008-11-25 16:47:02 +00:00
|
|
|
if (rval != 0)
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("NAND read from offset %zx failed %d\n",
|
2008-08-14 12:41:06 +00:00
|
|
|
offset, rval);
|
2008-11-25 16:47:02 +00:00
|
|
|
|
|
|
|
return rval;
|
2008-06-12 18:20:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
while (left_to_read > 0) {
|
|
|
|
size_t block_offset = offset & (nand->erasesize - 1);
|
|
|
|
size_t read_length;
|
|
|
|
|
|
|
|
if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("Skipping bad block 0x%08zx\n",
|
2008-06-12 18:20:16 +00:00
|
|
|
offset & ~(nand->erasesize - 1));
|
|
|
|
offset += nand->erasesize - block_offset;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (left_to_read < (nand->erasesize - block_offset))
|
|
|
|
read_length = left_to_read;
|
|
|
|
else
|
|
|
|
read_length = nand->erasesize - block_offset;
|
|
|
|
|
|
|
|
rval = nand_read (nand, offset, &read_length, p_buffer);
|
|
|
|
if (rval != 0) {
|
2009-01-19 00:46:06 +00:00
|
|
|
printf ("NAND read from offset %zx failed %d\n",
|
2008-08-14 12:41:06 +00:00
|
|
|
offset, rval);
|
2008-06-12 18:20:16 +00:00
|
|
|
*length -= left_to_read;
|
|
|
|
return rval;
|
|
|
|
}
|
|
|
|
|
|
|
|
left_to_read -= read_length;
|
|
|
|
offset += read_length;
|
|
|
|
p_buffer += read_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|