4 * Copyright (C) 2005 Mike Baker
5 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #include <sys/ioctl.h>
33 #include <mtd/mtd-user.h>
37 #define TRX_MAGIC 0x30524448 /* "HDR0" */
39 uint32_t magic; /* "HDR0" */
40 uint32_t len; /* Length of file including header */
41 uint32_t crc32; /* 32-bit CRC from flag_version to end of file */
42 uint32_t flag_version; /* 0:15 flags, 16:31 version */
43 uint32_t offsets[3]; /* Offsets of partitions from start of header */
46 #if __BYTE_ORDER == __BIG_ENDIAN
47 #define STORE32_LE(X) ((((X) & 0x000000FF) << 24) | (((X) & 0x0000FF00) << 8) | (((X) & 0x00FF0000) >> 8) | (((X) & 0xFF000000) >> 24))
48 #elif __BYTE_ORDER == __LITTLE_ENDIAN
49 #define STORE32_LE(X) (X)
51 #error unknown endianness!
54 ssize_t pread(int fd, void *buf, size_t count, off_t offset);
55 ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset);
58 trx_fixup(int fd, const char *name)
60 struct mtd_info_user mtdInfo;
62 struct trx_header *trx;
66 if (ioctl(fd, MEMGETINFO, &mtdInfo) < 0) {
67 fprintf(stderr, "Failed to get mtd info\n");
72 if (mtdInfo.size <= 0) {
73 fprintf(stderr, "Invalid MTD device size\n");
77 bfd = mtd_open(name, true);
78 ptr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, bfd, 0);
79 if (!ptr || (ptr == (void *) -1)) {
85 if (trx->magic != TRX_MAGIC) {
86 fprintf(stderr, "TRX header not found\n");
90 scan = ptr + offsetof(struct trx_header, flag_version);
91 trx->crc32 = crc32buf(scan, trx->len - (scan - ptr));
92 msync(ptr, sizeof(struct trx_header), MS_SYNC|MS_INVALIDATE);
100 fprintf(stderr, "Error fixing up TRX header\n");
105 trx_check(int imagefd, const char *mtd, char *buf, int *len)
107 const struct trx_header *trx = (const struct trx_header *) buf;
110 if (strcmp(mtd, "linux") != 0)
113 *len = read(imagefd, buf, 32);
115 fprintf(stdout, "Could not get image header, file too small (%d bytes)\n", *len);
119 if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) {
121 fprintf(stderr, "Bad trx header\n");
122 fprintf(stderr, "This is not the correct file format; refusing to flash.\n"
123 "Please specify the correct file or use -f to force.\n");
128 /* check if image fits to mtd device */
129 fd = mtd_check_open(mtd);
131 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
135 if(mtdsize < trx->len) {
136 fprintf(stderr, "Image too big for partition: %s\n", mtd);
146 mtd_fixtrx(const char *mtd, size_t offset)
149 struct trx_header *trx;
155 fprintf(stderr, "Trying to fix trx header in %s at 0x%x...\n", mtd, offset);
157 block_offset = offset & ~(erasesize - 1);
158 offset -= block_offset;
160 fd = mtd_check_open(mtd);
162 fprintf(stderr, "Could not open mtd device: %s\n", mtd);
166 if (block_offset + erasesize > mtdsize) {
167 fprintf(stderr, "Offset too large, device size 0x%x\n", mtdsize);
171 buf = malloc(erasesize);
177 res = pread(fd, buf, erasesize, block_offset);
178 if (res != erasesize) {
183 trx = (struct trx_header *) (buf + offset);
184 if (trx->magic != STORE32_LE(0x30524448)) {
185 fprintf(stderr, "No trx magic found\n");
189 if (trx->len == STORE32_LE(erasesize - offset)) {
191 fprintf(stderr, "Header already fixed, exiting\n");
196 trx->len = STORE32_LE(erasesize - offset);
198 trx->crc32 = STORE32_LE(crc32buf((char*) &trx->flag_version, erasesize - offset - 3*4));
199 if (mtd_erase_block(fd, block_offset)) {
200 fprintf(stderr, "Can't erease block at 0x%x (%s)\n", block_offset, strerror(errno));
205 fprintf(stderr, "New crc32: 0x%x, rewriting block\n", trx->crc32);
207 if (pwrite(fd, buf, erasesize, block_offset) != erasesize) {
208 fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
213 fprintf(stderr, "Done.\n");