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mtd: add option for TRX magic to fixtrx 

Buffalo uses the TRX header with a different magic and even changes this
magic with different devices. This change allows to specify the header
to use as a command line argument.

This is needed for the Buffalo WSR-2533DHP2 based on mt7622.

Co-Developed-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
INAGAKI Hiroshi 2021-03-07 16:47:17 +01:00 committed by Hauke Mehrtens
parent 4d9f69322c
commit b5b0796a13
3 changed files with 17 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
package/system/mtd/src/mtd.c
View File

@ -94,6 +94,7 @@ int mtdsize = 0;
int erasesize = 0;
int jffs2_skip_bytes=0;
int mtdtype = 0;
uint32_t opt_trxmagic = TRX_MAGIC;
int mtd_open(const char *mtd, bool block)
{
@ -205,7 +206,7 @@ image_check(int imagefd, const char *mtd)
magic = ((uint32_t *)buf)[0];
if (be32_to_cpu(magic) == TRX_MAGIC)
if (be32_to_cpu(magic) == opt_trxmagic)
imageformat = MTD_IMAGE_FORMAT_TRX;
else if (be32_to_cpu(magic) == SEAMA_MAGIC)
imageformat = MTD_IMAGE_FORMAT_SEAMA;
@ -810,6 +811,7 @@ static void usage(void)
" -l <length> the length of data that we want to dump\n");
if (mtd_fixtrx) {
fprintf(stderr,
" -M <magic> magic number of the image header in the partition (for fixtrx)\n"
" -o offset offset of the image header in the partition(for fixtrx)\n");
}
if (mtd_fixtrx || mtd_fixseama || mtd_fixwrg || mtd_fixwrgg) {
@ -877,7 +879,7 @@ int main (int argc, char **argv)
#ifdef FIS_SUPPORT
"F:"
#endif
"frnqe:d:s:j:p:o:c:t:l:")) != -1)
"frnqe:d:s:j:p:o:c:t:l:M:")) != -1)
switch (ch) {
case 'f':
force = 1;
@ -929,6 +931,14 @@ int main (int argc, char **argv)
usage();
}
break;
case 'M':
errno = 0;
opt_trxmagic = strtoul(optarg, 0, 0);
if (errno) {
fprintf(stderr, "-M: illegal numeric string\n");
usage();
}
break;
case 'o':
errno = 0;
offset = strtoul(optarg, 0, 0);

1
package/system/mtd/src/mtd.h
View File

@ -12,6 +12,7 @@
extern int quiet;
extern int mtdsize;
extern int erasesize;
extern uint32_t opt_trxmagic;
extern int mtd_open(const char *mtd, bool block);
extern int mtd_check_open(const char *mtd);

8
package/system/mtd/src/trx.c
View File

@ -35,7 +35,6 @@
#include "mtd.h"
#include "crc32.h"
#define TRX_MAGIC 0x30524448 /* "HDR0" */
#define TRX_CRC32_DATA_OFFSET 12 /* First 12 bytes are not covered by CRC32 */
#define TRX_CRC32_DATA_SIZE 16
struct trx_header {
@ -92,7 +91,7 @@ trx_fixup(int fd, const char *name)
}
trx = ptr;
if (trx->magic != TRX_MAGIC) {
if (ntohl(trx->magic) != opt_trxmagic) {
fprintf(stderr, "TRX header not found\n");
goto err;
}
@ -127,7 +126,8 @@ trx_check(int imagefd, const char *mtd, char *buf, int *len)
}
}
if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) {
if (ntohl(trx->magic) != opt_trxmagic ||
trx->len < sizeof(struct trx_header)) {
if (quiet < 2) {
fprintf(stderr, "Bad trx header\n");
fprintf(stderr, "This is not the correct file format; refusing to flash.\n"
@ -200,7 +200,7 @@ mtd_fixtrx(const char *mtd, size_t offset, size_t data_size)
}
trx = (struct trx_header *)(first_block + offset);
if (trx->magic != STORE32_LE(0x30524448)) {
if (ntohl(trx->magic) != opt_trxmagic) {
fprintf(stderr, "No trx magic found\n");
exit(1);
}