From 86382b98a47616d0ac75e336381c4d27bc88e69f Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 12 Feb 2006 06:00:38 +0000
Subject: add support for netgear dg834 and the almost identical sphairon
jdr454wb: new images, automatic boot loader patcher, updated flash script
(dlink.pl renamed to adam2flash.pl) - Thanks to Jonathan McDowell (Noodles)
SVN-Revision: 3221
---
.../linux/package/base-files/src/jffs2root.c | 133 +++++++++++++++++++++
1 file changed, 133 insertions(+)
create mode 100644 openwrt/target/linux/package/base-files/src/jffs2root.c
(limited to 'openwrt/target/linux/package/base-files/src/jffs2root.c')
diff --git a/openwrt/target/linux/package/base-files/src/jffs2root.c b/openwrt/target/linux/package/base-files/src/jffs2root.c
new file mode 100644
index 0000000..14662fc
--- /dev/null
+++ b/openwrt/target/linux/package/base-files/src/jffs2root.c
@@ -0,0 +1,133 @@
+/*
+ * jffs2root.c
+ *
+ * Copyright (C) 2005 Mike Baker
+ *
+ * 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.
+ *
+ * $Id$
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+#include <linux/mtd/mtd.h>
+
+#define FILENAME "/dev/mtdblock/1"
+
+struct trx_header {
+ unsigned magic; /* "HDR0" */
+ unsigned len; /* Length of file including header */
+ unsigned crc32; /* 32-bit CRC from flag_version to end of file */
+ unsigned flag_version; /* 0:15 flags, 16:31 version */
+ unsigned offsets[3]; /* Offsets of partitions from start of header */
+};
+
+unsigned long *crc32;
+
+void init_crc32()
+{
+ unsigned long crc;
+ unsigned long poly = 0xEDB88320L;
+ int n, bit;
+ if ((crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long))) == (void *)-1) {
+ perror("malloc");
+ exit(1);
+ }
+ for (n = 0; n < 256; n++) {
+ crc = (unsigned long) n;
+ for (bit = 0; bit < 8; bit++)
+ crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
+ crc32[n] = crc;
+ }
+}
+
+unsigned int crc32buf(char *buf, size_t len)
+{
+ unsigned int crc = 0xFFFFFFFF;
+ for (; len; len--, buf++)
+ crc = crc32[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+ return crc;
+}
+
+int main(int argc, char **argv)
+{
+ int fd;
+ struct mtd_info_user mtdInfo;
+ unsigned long len;
+ struct trx_header *ptr;
+ char *buf;
+
+ if (((fd = open(FILENAME, O_RDWR)) < 0)
+ || ((len = lseek(fd, 0, SEEK_END)) < 0)
+ || ((ptr = (struct trx_header *) mmap(0, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))
+ || (ptr->magic != 0x30524448)) {
+ printf("Error reading trx info\n");
+ exit(-1);
+ }
+ close (fd);
+
+ if (((fd = open("/dev/mtd/1", O_RDWR)) < 0)
+ || (ioctl(fd, MEMGETINFO, &mtdInfo))) {
+ fprintf(stderr, "Could not get MTD device info from %s\n", FILENAME);
+ close(fd);
+ exit(1);
+ }
+ close(fd);
+
+ if (argc > 1 && !strcmp(argv[1],"--move")) {
+ if (ptr->offsets[2] >= ptr->len) {
+ printf("Partition already moved outside trx\n");
+ } else {
+ init_crc32();
+ ptr->offsets[2] += (mtdInfo.erasesize - 1);
+ ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
+ ptr->len = ptr->offsets[2];
+ ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
+ msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
+ printf("Partition moved; please reboot\n");
+ }
+ } else if (argc > 1 && !strcmp(argv[1], "--clean")) {
+ buf = (char *) ptr;
+ if (buf[ptr->offsets[1] - 1] == 0) {
+ init_crc32();
+ buf[ptr->offsets[1] - 1] = 1;
+ ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
+ msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
+ printf("Partition marked as clean\n");
+ }
+ } else {
+ int x;
+ printf(" erase: 0x%08x\n",mtdInfo.erasesize);
+ printf("=== trx ===\n");
+ printf("mapped: 0x%08x\n", (unsigned)ptr);
+ printf(" magic: 0x%08x\n", ptr->magic);
+ printf(" len: 0x%08x\n", ptr->len);
+ printf(" crc: 0x%08x\n", ptr->crc32);
+ for (x = 0; x < 3; x++)
+ printf(" offset[%d]: 0x%08x\n", x, ptr->offsets[x]);
+ }
+
+ munmap((void *) ptr, len);
+ return 0;
+}
--
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