M7350/filesystems/mtd-utils/flash_erase.c

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2024-09-09 08:57:42 +00:00
/* flash_erase.c -- erase MTD devices
Copyright (C) 2000 Arcom Control System Ltd
Copyright (C) 2010 Mike Frysinger <vapier@gentoo.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#define PROGRAM_NAME "flash_erase"
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <common.h>
#include <crc32.h>
#include <libmtd.h>
#include <mtd/mtd-user.h>
#include <mtd/jffs2-user.h>
static const char *mtd_device;
static int quiet; /* true -- don't output progress */
static int jffs2; /* format for jffs2 usage */
static int noskipbad; /* do not skip bad blocks */
static int unlock; /* unlock sectors before erasing */
static struct jffs2_unknown_node cleanmarker;
int target_endian = __BYTE_ORDER;
static void show_progress(struct mtd_dev_info *mtd, off_t start, int eb,
int eb_start, int eb_cnt)
{
bareverbose(!quiet, "\rErasing %d Kibyte @ %"PRIxoff_t" -- %2i %% complete ",
mtd->eb_size / 1024, start, ((eb - eb_start) * 100) / eb_cnt);
fflush(stdout);
}
static void display_help (void)
{
printf("Usage: %s [options] MTD_DEVICE <start offset> <block count>\n"
"Erase blocks of the specified MTD device.\n"
"Specify a count of 0 to erase to end of device.\n"
"\n"
" -j, --jffs2 format the device for jffs2\n"
" -N, --noskipbad don't skip bad blocks\n"
" -u, --unlock unlock sectors before erasing\n"
" -q, --quiet do not display progress messages\n"
" --silent same as --quiet\n"
" --help display this help and exit\n"
" --version output version information and exit\n",
PROGRAM_NAME);
}
static void display_version (void)
{
printf("%1$s version " VERSION "\n"
"\n"
"Copyright (C) 2000 Arcom Control Systems Ltd\n"
"\n"
"%1$s comes with NO WARRANTY\n"
"to the extent permitted by law.\n"
"\n"
"You may redistribute copies of %1$s\n"
"under the terms of the GNU General Public Licence.\n"
"See the file `COPYING' for more information.\n",
PROGRAM_NAME);
}
int main(int argc, char *argv[])
{
libmtd_t mtd_desc;
struct mtd_dev_info mtd;
int fd, clmpos = 0, clmlen = 8;
unsigned long long start;
unsigned int eb, eb_start, eb_cnt;
bool isNAND;
int error = 0;
off_t offset = 0;
/*
* Process user arguments
*/
for (;;) {
int option_index = 0;
static const char *short_options = "jNqu";
static const struct option long_options[] = {
{"help", no_argument, 0, 0},
{"version", no_argument, 0, 0},
{"jffs2", no_argument, 0, 'j'},
{"noskipbad", no_argument, 0, 'N'},
{"quiet", no_argument, 0, 'q'},
{"silent", no_argument, 0, 'q'},
{"unlock", no_argument, 0, 'u'},
{0, 0, 0, 0},
};
int c = getopt_long(argc, argv, short_options,
long_options, &option_index);
if (c == EOF)
break;
switch (c) {
case 0:
switch (option_index) {
case 0:
display_help();
return 0;
case 1:
display_version();
return 0;
}
break;
case 'j':
jffs2 = 1;
break;
case 'N':
noskipbad = 1;
break;
case 'q':
quiet = 1;
break;
case 'u':
unlock = 1;
break;
case '?':
error = 1;
break;
}
}
switch (argc - optind) {
case 3:
mtd_device = argv[optind];
start = simple_strtoull(argv[optind + 1], &error);
eb_cnt = simple_strtoul(argv[optind + 2], &error);
break;
default:
case 0:
errmsg("no MTD device specified");
case 1:
errmsg("no start erase block specified");
case 2:
errmsg("no erase block count specified");
error = 1;
break;
}
if (error)
return errmsg("Try `--help' for more information");
/*
* Locate MTD and prepare for erasure
*/
mtd_desc = libmtd_open();
if (mtd_desc == NULL)
return errmsg("can't initialize libmtd");
if ((fd = open(mtd_device, O_RDWR)) < 0)
return sys_errmsg("%s", mtd_device);
if (mtd_get_dev_info(mtd_desc, mtd_device, &mtd) < 0)
return errmsg("mtd_get_dev_info failed");
if (jffs2 && mtd.type == MTD_MLCNANDFLASH)
return errmsg("JFFS2 cannot support MLC NAND.");
eb_start = start / mtd.eb_size;
isNAND = mtd.type == MTD_NANDFLASH || mtd.type == MTD_MLCNANDFLASH;
if (jffs2) {
cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
if (!isNAND)
cleanmarker.totlen = cpu_to_je32(sizeof(cleanmarker));
else {
struct nand_oobinfo oobinfo;
if (ioctl(fd, MEMGETOOBSEL, &oobinfo) != 0)
return sys_errmsg("%s: unable to get NAND oobinfo", mtd_device);
/* Check for autoplacement */
if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
/* Get the position of the free bytes */
if (!oobinfo.oobfree[0][1])
return errmsg(" Eeep. Autoplacement selected and no empty space in oob");
clmpos = oobinfo.oobfree[0][0];
clmlen = oobinfo.oobfree[0][1];
if (clmlen > 8)
clmlen = 8;
} else {
/* Legacy mode */
switch (mtd.oob_size) {
case 8:
clmpos = 6;
clmlen = 2;
break;
case 16:
clmpos = 8;
clmlen = 8;
break;
case 64:
clmpos = 16;
clmlen = 8;
break;
}
}
cleanmarker.totlen = cpu_to_je32(8);
}
cleanmarker.hdr_crc = cpu_to_je32(mtd_crc32(0, &cleanmarker, sizeof(cleanmarker) - 4));
}
/*
* Now do the actual erasing of the MTD device
*/
if (eb_cnt == 0)
eb_cnt = (mtd.size / mtd.eb_size) - eb_start;
for (eb = eb_start; eb < eb_start + eb_cnt; eb++) {
offset = (off_t)eb * mtd.eb_size;
if (!noskipbad) {
int ret = mtd_is_bad(&mtd, fd, eb);
if (ret > 0) {
verbose(!quiet, "Skipping bad block at %08"PRIxoff_t, offset);
continue;
} else if (ret < 0) {
if (errno == EOPNOTSUPP) {
noskipbad = 1;
if (isNAND)
return errmsg("%s: Bad block check not available", mtd_device);
} else
return sys_errmsg("%s: MTD get bad block failed", mtd_device);
}
}
show_progress(&mtd, offset, eb, eb_start, eb_cnt);
if (unlock) {
if (mtd_unlock(&mtd, fd, eb) != 0) {
sys_errmsg("%s: MTD unlock failure", mtd_device);
continue;
}
}
if (mtd_erase(mtd_desc, &mtd, fd, eb) != 0) {
sys_errmsg("%s: MTD Erase failure", mtd_device);
continue;
}
/* format for JFFS2 ? */
if (!jffs2)
continue;
/* write cleanmarker */
if (isNAND) {
if (mtd_write_oob(mtd_desc, &mtd, fd, (uint64_t)offset + clmpos, clmlen, &cleanmarker) != 0) {
sys_errmsg("%s: MTD writeoob failure", mtd_device);
continue;
}
} else {
if (pwrite(fd, &cleanmarker, sizeof(cleanmarker), (loff_t)offset) != sizeof(cleanmarker)) {
sys_errmsg("%s: MTD write failure", mtd_device);
continue;
}
}
verbose(!quiet, " Cleanmarker written at %"PRIxoff_t, offset);
}
show_progress(&mtd, offset, eb, eb_start, eb_cnt);
bareverbose(!quiet, "\n");
return 0;
}