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![Liu, Wentao](/assets/img/avatar_default.png)
In function nand_write_skip_bad(),for YAFFS filesystem part, write_oob() will return 0 when success, so when rval equals 0, it should continue to write the next page, and no break. Signed-off-by: Wentao, Liu <wentao.liu@intel.com> Acked-by: Lei Wen <leiwen@marvell.com> Signed-off-by: Scott Wood <scott@tyr.buserror.net>
682 lines
17 KiB
C
682 lines
17 KiB
C
/*
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* drivers/mtd/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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* Copyright (C) 2008 Nokia Corporation: drop_ffs() function by
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* Artem Bityutskiy <dedekind1@gmail.com> from mtd-utils
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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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* Copyright 2010 Freescale Semiconductor
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* The portions of this file whose copyright is held by Freescale and which
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* are not considered a derived work of GPL v2-only code may be distributed
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* and/or modified under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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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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#include <div64.h>
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#include <asm/errno.h>
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#include <linux/mtd/mtd.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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* 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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unsigned long erase_length, erased_length; /* in blocks */
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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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const char *mtd_device = meminfo->name;
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struct mtd_oob_ops oob_opts;
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struct nand_chip *chip = meminfo->priv;
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if ((opts->offset & (meminfo->writesize - 1)) != 0) {
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printf("Attempt to erase non page aligned data\n");
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return -1;
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}
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memset(&erase, 0, sizeof(erase));
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memset(&oob_opts, 0, sizeof(oob_opts));
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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 = lldiv(opts->length + meminfo->erasesize - 1,
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meminfo->erasesize);
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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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/* 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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erase.scrub = opts->scrub;
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/*
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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 (chip->bbt) {
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kfree(chip->bbt);
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}
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chip->bbt = NULL;
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}
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for (erased_length = 0;
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erased_length < 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%08llx "
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" \n",
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erase.addr);
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if (!opts->spread)
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erased_length++;
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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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erased_length++;
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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 && chip->ecc.layout->oobavail >= 8) {
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chip->ops.ooblen = 8;
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chip->ops.datbuf = NULL;
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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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result = meminfo->write_oob(meminfo,
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erase.addr,
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&chip->ops);
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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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}
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if (!opts->quiet) {
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unsigned long long n = erased_length * 100ULL;
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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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/* 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%llx -- %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%llx.",
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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 (opts->scrub)
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chip->scan_bbt(meminfo);
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return 0;
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}
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#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
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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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* @param mtd nand mtd instance
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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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int nand_lock(struct mtd_info *mtd, int tight)
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{
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int ret = 0;
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int status;
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struct nand_chip *chip = mtd->priv;
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/* select the NAND device */
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chip->select_chip(mtd, 0);
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chip->cmdfunc(mtd,
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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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status = chip->waitfunc(mtd, chip);
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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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chip->select_chip(mtd, -1);
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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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* @param mtd nand mtd instance
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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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int nand_get_lock_status(struct mtd_info *mtd, loff_t offset)
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{
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int ret = 0;
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int chipnr;
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int page;
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struct nand_chip *chip = mtd->priv;
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/* select the NAND device */
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chipnr = (int)(offset >> chip->chip_shift);
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chip->select_chip(mtd, chipnr);
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if ((offset & (mtd->writesize - 1)) != 0) {
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printf ("nand_get_lock_status: "
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"Start address must be beginning of "
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"nand page!\n");
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ret = -1;
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goto out;
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}
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/* check the Lock Status */
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page = (int)(offset >> chip->page_shift);
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chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask);
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ret = chip->read_byte(mtd) & (NAND_LOCK_STATUS_TIGHT
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| NAND_LOCK_STATUS_LOCK
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| NAND_LOCK_STATUS_UNLOCK);
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out:
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/* de-select the NAND device */
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chip->select_chip(mtd, -1);
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return ret;
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}
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/**
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* nand_unlock: - Unlock area of NAND pages
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* only one consecutive area can be unlocked at one time!
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*
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* @param mtd nand mtd instance
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* @param start start byte address
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* @param length number of bytes to unlock (must be a multiple of
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* page size nand->writesize)
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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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int nand_unlock(struct mtd_info *mtd, ulong start, ulong length)
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{
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int ret = 0;
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int chipnr;
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int status;
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int page;
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struct nand_chip *chip = mtd->priv;
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printf ("nand_unlock: start: %08x, length: %d!\n",
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(int)start, (int)length);
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/* select the NAND device */
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chipnr = (int)(start >> chip->chip_shift);
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chip->select_chip(mtd, chipnr);
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/* check the WP bit */
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chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
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if (!(chip->read_byte(mtd) & NAND_STATUS_WP)) {
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printf ("nand_unlock: Device is write protected!\n");
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ret = -1;
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goto out;
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}
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if ((start & (mtd->erasesize - 1)) != 0) {
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printf ("nand_unlock: Start address must be beginning of "
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"nand block!\n");
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ret = -1;
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goto out;
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}
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if (length == 0 || (length & (mtd->erasesize - 1)) != 0) {
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printf ("nand_unlock: Length must be a multiple of nand block "
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"size %08x!\n", mtd->erasesize);
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ret = -1;
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goto out;
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}
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/*
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* Set length so that the last address is set to the
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* starting address of the last block
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*/
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length -= mtd->erasesize;
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/* submit address of first page to unlock */
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page = (int)(start >> chip->page_shift);
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chip->cmdfunc(mtd, NAND_CMD_UNLOCK1, -1, page & chip->pagemask);
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/* submit ADDRESS of LAST page to unlock */
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page += (int)(length >> chip->page_shift);
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chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, page & chip->pagemask);
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/* call wait ready function */
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status = chip->waitfunc(mtd, chip);
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/* see if device thinks it succeeded */
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if (status & 0x01) {
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/* there was an error */
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ret = -1;
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goto out;
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}
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out:
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/* de-select the NAND device */
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chip->select_chip(mtd, -1);
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return ret;
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}
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#endif
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/**
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* check_skip_len
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*
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* Check if there are any bad blocks, and whether length including bad
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* blocks fits into device
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*
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* @param nand NAND device
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* @param offset offset in flash
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* @param length image length
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* @return 0 if the image fits and there are no bad blocks
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* 1 if the image fits, but there are bad blocks
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* -1 if the image does not fit
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*/
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static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length)
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{
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size_t len_excl_bad = 0;
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int ret = 0;
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while (len_excl_bad < length) {
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size_t block_len, block_off;
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loff_t block_start;
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if (offset >= nand->size)
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return -1;
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block_start = offset & ~(loff_t)(nand->erasesize - 1);
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block_off = offset & (nand->erasesize - 1);
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block_len = nand->erasesize - block_off;
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if (!nand_block_isbad(nand, block_start))
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len_excl_bad += block_len;
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else
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ret = 1;
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offset += block_len;
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}
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return ret;
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}
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#ifdef CONFIG_CMD_NAND_TRIMFFS
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static size_t drop_ffs(const nand_info_t *nand, const u_char *buf,
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const size_t *len)
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{
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size_t i, l = *len;
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for (i = l - 1; i >= 0; i--)
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if (buf[i] != 0xFF)
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break;
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/* The resulting length must be aligned to the minimum flash I/O size */
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l = i + 1;
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l = (l + nand->writesize - 1) / nand->writesize;
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l *= nand->writesize;
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/*
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* since the input length may be unaligned, prevent access past the end
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* of the buffer
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*/
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return min(l, *len);
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}
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#endif
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/**
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* nand_write_skip_bad:
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*
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* Write image to NAND flash.
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* Blocks that are marked bad are skipped and the is written to the next
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* block instead as long as the image is short enough to fit even after
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* skipping the bad blocks.
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*
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* @param nand NAND device
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* @param offset offset in flash
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* @param length buffer length
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* @param buffer buffer to read from
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* @param flags flags modifying the behaviour of the write to NAND
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* @return 0 in case of success
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*/
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int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
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u_char *buffer, int flags)
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{
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int rval = 0, blocksize;
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size_t left_to_write = *length;
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u_char *p_buffer = buffer;
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int need_skip;
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#ifdef CONFIG_CMD_NAND_YAFFS
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if (flags & WITH_YAFFS_OOB) {
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if (flags & ~WITH_YAFFS_OOB)
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return -EINVAL;
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int pages;
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pages = nand->erasesize / nand->writesize;
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blocksize = (pages * nand->oobsize) + nand->erasesize;
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if (*length % (nand->writesize + nand->oobsize)) {
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printf ("Attempt to write incomplete page"
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" in yaffs mode\n");
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return -EINVAL;
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}
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} else
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#endif
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{
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blocksize = nand->erasesize;
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}
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/*
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* nand_write() handles unaligned, partial page writes.
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*
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* We allow length to be unaligned, for convenience in
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* using the $filesize variable.
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*
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* However, starting at an unaligned offset makes the
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* semantics of bad block skipping ambiguous (really,
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* you should only start a block skipping access at a
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* partition boundary). So don't try to handle that.
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*/
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if ((offset & (nand->writesize - 1)) != 0) {
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printf ("Attempt to write non page aligned data\n");
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*length = 0;
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return -EINVAL;
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}
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need_skip = check_skip_len(nand, offset, *length);
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if (need_skip < 0) {
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printf ("Attempt to write outside the flash area\n");
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*length = 0;
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return -EINVAL;
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}
|
|
|
|
if (!need_skip && !(flags & WITH_DROP_FFS)) {
|
|
rval = nand_write (nand, offset, length, buffer);
|
|
if (rval == 0)
|
|
return 0;
|
|
|
|
*length = 0;
|
|
printf ("NAND write to offset %llx failed %d\n",
|
|
offset, rval);
|
|
return rval;
|
|
}
|
|
|
|
while (left_to_write > 0) {
|
|
size_t block_offset = offset & (nand->erasesize - 1);
|
|
size_t write_size, truncated_write_size;
|
|
|
|
WATCHDOG_RESET ();
|
|
|
|
if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
|
|
printf ("Skip bad block 0x%08llx\n",
|
|
offset & ~(nand->erasesize - 1));
|
|
offset += nand->erasesize - block_offset;
|
|
continue;
|
|
}
|
|
|
|
if (left_to_write < (blocksize - block_offset))
|
|
write_size = left_to_write;
|
|
else
|
|
write_size = blocksize - block_offset;
|
|
|
|
#ifdef CONFIG_CMD_NAND_YAFFS
|
|
if (flags & WITH_YAFFS_OOB) {
|
|
int page, pages;
|
|
size_t pagesize = nand->writesize;
|
|
size_t pagesize_oob = pagesize + nand->oobsize;
|
|
struct mtd_oob_ops ops;
|
|
|
|
ops.len = pagesize;
|
|
ops.ooblen = nand->oobsize;
|
|
ops.mode = MTD_OOB_AUTO;
|
|
ops.ooboffs = 0;
|
|
|
|
pages = write_size / pagesize_oob;
|
|
for (page = 0; page < pages; page++) {
|
|
WATCHDOG_RESET();
|
|
|
|
ops.datbuf = p_buffer;
|
|
ops.oobbuf = ops.datbuf + pagesize;
|
|
|
|
rval = nand->write_oob(nand, offset, &ops);
|
|
if (rval != 0)
|
|
break;
|
|
|
|
offset += pagesize;
|
|
p_buffer += pagesize_oob;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
truncated_write_size = write_size;
|
|
#ifdef CONFIG_CMD_NAND_TRIMFFS
|
|
if (flags & WITH_DROP_FFS)
|
|
truncated_write_size = drop_ffs(nand, p_buffer,
|
|
&write_size);
|
|
#endif
|
|
|
|
rval = nand_write(nand, offset, &truncated_write_size,
|
|
p_buffer);
|
|
offset += write_size;
|
|
p_buffer += write_size;
|
|
}
|
|
|
|
if (rval != 0) {
|
|
printf ("NAND write to offset %llx failed %d\n",
|
|
offset, rval);
|
|
*length -= left_to_write;
|
|
return rval;
|
|
}
|
|
|
|
left_to_write -= 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, loff_t offset, size_t *length,
|
|
u_char *buffer)
|
|
{
|
|
int rval;
|
|
size_t left_to_read = *length;
|
|
u_char *p_buffer = buffer;
|
|
int need_skip;
|
|
|
|
if ((offset & (nand->writesize - 1)) != 0) {
|
|
printf ("Attempt to read non page aligned data\n");
|
|
*length = 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
need_skip = check_skip_len(nand, offset, *length);
|
|
if (need_skip < 0) {
|
|
printf ("Attempt to read outside the flash area\n");
|
|
*length = 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!need_skip) {
|
|
rval = nand_read (nand, offset, length, buffer);
|
|
if (!rval || rval == -EUCLEAN)
|
|
return 0;
|
|
|
|
*length = 0;
|
|
printf ("NAND read from offset %llx failed %d\n",
|
|
offset, rval);
|
|
return rval;
|
|
}
|
|
|
|
while (left_to_read > 0) {
|
|
size_t block_offset = offset & (nand->erasesize - 1);
|
|
size_t read_length;
|
|
|
|
WATCHDOG_RESET ();
|
|
|
|
if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
|
|
printf ("Skipping bad block 0x%08llx\n",
|
|
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 && rval != -EUCLEAN) {
|
|
printf ("NAND read from offset %llx failed %d\n",
|
|
offset, rval);
|
|
*length -= left_to_read;
|
|
return rval;
|
|
}
|
|
|
|
left_to_read -= read_length;
|
|
offset += read_length;
|
|
p_buffer += read_length;
|
|
}
|
|
|
|
return 0;
|
|
}
|