--- /dev/null
+/*
+ * Linksys boot counter reset code for mtd
+ *
+ * Copyright (C) 2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License v2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <endian.h>
+#include <string.h>
+#include <errno.h>
+
+#include <sys/ioctl.h>
+#include <mtd/mtd-user.h>
+
+#include "mtd.h"
+
+#define BOOTCOUNT_MAGIC 0x20110811
+
+struct bootcounter {
+ uint32_t magic;
+ uint32_t count;
+ uint32_t checksum;
+};
+
+static char page[2048];
+
+int mtd_resetbc(const char *mtd)
+{
+ struct mtd_info_user mtd_info;
+ struct bootcounter *curr = (struct bootcounter *)page;
+ unsigned int i;
+ int last_count = 0;
+ int num_bc;
+ int fd;
+ int ret;
+
+ fd = mtd_check_open(mtd);
+
+ if (ioctl(fd, MEMGETINFO, &mtd_info) < 0) {
+ fprintf(stderr, "failed to get mtd info!\n");
+ return -1;
+ }
+
+ num_bc = mtd_info.size / mtd_info.writesize;
+
+ for (i = 0; i < num_bc; i++) {
+ pread(fd, curr, sizeof(*curr), i * mtd_info.writesize);
+
+ if (curr->magic != BOOTCOUNT_MAGIC && curr->magic != 0xffffffff) {
+ fprintf(stderr, "unexpected magic %08x, bailing out\n", curr->magic);
+ goto out;
+ }
+
+ if (curr->magic == 0xffffffff)
+ break;
+
+ last_count = curr->count;
+ }
+
+ /* no need to do writes when last boot count is already 0 */
+ if (last_count == 0)
+ goto out;
+
+
+ if (i == num_bc) {
+ struct erase_info_user erase_info;
+ erase_info.start = 0;
+ erase_info.length = mtd_info.size;
+
+ /* erase block */
+ ret = ioctl(fd, MEMERASE, &erase_info);
+ if (ret < 0) {
+ fprintf(stderr, "failed to erase block: %i\n", ret);
+ return -1;
+ }
+
+ i = 0;
+ }
+
+ memset(curr, 0xff, mtd_info.writesize);
+
+ curr->magic = BOOTCOUNT_MAGIC;
+ curr->count = 0;
+ curr->checksum = BOOTCOUNT_MAGIC;
+
+ ret = pwrite(fd, curr, mtd_info.writesize, i * mtd_info.writesize);
+ if (ret < 0)
+ fprintf(stderr, "failed to write: %i\n", ret);
+ sync();
+out:
+ close(fd);
+
+ return 0;
+}
" verify <imagefile>|- verify <imagefile> (use - for stdin) to device\n"
" write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
" jffs2write <file> append <file> to the jffs2 partition on the device\n");
+ if (mtd_resetbc) {
+ fprintf(stderr,
+ " resetbc <device> reset the uboot boot counter\n");
+ }
if (mtd_fixtrx) {
fprintf(stderr,
" fixtrx fix the checksum in a trx header on first boot\n");
CMD_FIXSEAMA,
CMD_VERIFY,
CMD_DUMP,
+ CMD_RESETBC,
} cmd = -1;
erase[0] = NULL;
} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
cmd = CMD_ERASE;
device = argv[1];
+ } else if (((strcmp(argv[0], "resetbc") == 0) && (argc == 2)) && mtd_resetbc) {
+ cmd = CMD_RESETBC;
+ device = argv[1];
} else if (((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) && mtd_fixtrx) {
cmd = CMD_FIXTRX;
device = argv[1];
case CMD_FIXTRX:
if (mtd_fixtrx) {
mtd_fixtrx(device, offset);
+ }
+ case CMD_RESETBC:
+ if (mtd_resetbc) {
+ mtd_resetbc(device);
}
case CMD_FIXSEAMA:
if (mtd_fixseama)
projects / openwrt / svn-archive / openwrt.git / commitdiff