SVN-Revision: 12655master
Felix Fietkau
16 years ago
parent
6ce27efe73
commit
bbd9eb4669
@ -1,6 +1,10 @@ |
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CC = gcc
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CFLAGS += -Wall
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mtd: mtd.o jffs2.o crc32.o |
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obj = mtd.o jffs2.o crc32.o
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obj.brcm = trx.o
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obj.brcm47xx = $(obj.brcm)
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mtd: $(obj) $(obj.$(TARGET)) |
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clean: |
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rm -f *.o jffs2
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@ -1,18 +1,28 @@ |
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#ifndef __mtd_h |
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#define __mtd_h |
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#include <stdbool.h> |
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#ifdef target_brcm47xx |
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#define target_brcm 1 |
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#endif |
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#define JFFS2_EOF "\xde\xad\xc0\xde" |
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extern int quiet; |
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extern int mtdsize; |
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extern int erasesize; |
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extern int mtd_open(const char *mtd); |
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extern int mtd_open(const char *mtd, bool block); |
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extern int mtd_check_open(const char *mtd); |
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extern int mtd_erase_block(int fd, int offset); |
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extern int mtd_write_buffer(int fd, const char *buf, int offset, int length); |
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extern int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir); |
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extern int mtd_replace_jffs2(int fd, int ofs, const char *filename); |
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extern int mtd_replace_jffs2(const char *mtd, int fd, int ofs, const char *filename); |
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extern void mtd_parse_jffs2data(const char *buf, const char *dir); |
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/* target specific */ |
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extern int trx_fixup(int fd, const char *name); |
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extern int trx_check(int imagefd, const char *mtd, char *buf, int *len); |
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#endif /* __mtd_h */ |
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@ -0,0 +1,165 @@ |
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/*
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* trx.c |
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* |
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* Copyright (C) 2005 Mike Baker
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* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stddef.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <string.h> |
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#include <sys/ioctl.h> |
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#include "mtd-api.h" |
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#include "mtd.h" |
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#define TRX_MAGIC 0x30524448 /* "HDR0" */ |
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struct trx_header { |
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unsigned magic; /* "HDR0" */ |
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unsigned len; /* Length of file including header */ |
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unsigned crc32; /* 32-bit CRC from flag_version to end of file */ |
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unsigned flag_version; /* 0:15 flags, 16:31 version */ |
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unsigned offsets[3]; /* Offsets of partitions from start of header */ |
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}; |
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static unsigned long *crc32 = NULL; |
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static void init_crc32() |
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{ |
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unsigned long crc; |
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unsigned long poly = 0xEDB88320L; |
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int n, bit; |
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if (crc32) |
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return; |
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crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long)); |
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if (!crc32) { |
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perror("malloc"); |
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exit(1); |
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} |
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for (n = 0; n < 256; n++) { |
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crc = (unsigned long) n; |
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for (bit = 0; bit < 8; bit++) |
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crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1); |
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crc32[n] = crc; |
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} |
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} |
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static unsigned int crc32buf(char *buf, size_t len) |
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{ |
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unsigned int crc = 0xFFFFFFFF; |
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for (; len; len--, buf++) |
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crc = crc32[(crc ^ *buf) & 0xff] ^ (crc >> 8); |
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return crc; |
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} |
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int |
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trx_fixup(int fd, const char *name) |
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{ |
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struct mtd_info_user mtdInfo; |
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unsigned long len; |
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struct trx_header *trx; |
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void *ptr, *scan; |
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int bfd; |
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if (ioctl(fd, MEMGETINFO, &mtdInfo) < 0) { |
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fprintf(stderr, "Failed to get mtd info\n"); |
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goto err; |
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} |
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len = mtdInfo.size; |
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if (mtdInfo.size <= 0) { |
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fprintf(stderr, "Invalid MTD device size\n"); |
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goto err; |
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} |
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bfd = mtd_open(name, true); |
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ptr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, bfd, 0); |
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if (!ptr || (ptr == (void *) -1)) { |
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perror("mmap"); |
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goto err1; |
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} |
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trx = ptr; |
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if (trx->magic != TRX_MAGIC) { |
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fprintf(stderr, "TRX header not found\n"); |
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goto err; |
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} |
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init_crc32(); |
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scan = ptr + offsetof(struct trx_header, flag_version); |
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trx->crc32 = crc32buf(scan, trx->len - (scan - ptr)); |
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msync(ptr, sizeof(struct trx_header), MS_SYNC|MS_INVALIDATE); |
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munmap(ptr, len); |
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close(bfd); |
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return 0; |
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err1: |
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close(bfd); |
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err: |
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fprintf(stderr, "Error fixing up TRX header\n"); |
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return -1; |
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} |
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int |
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trx_check(int imagefd, const char *mtd, char *buf, int *len) |
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{ |
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const struct trx_header *trx = (const struct trx_header *) buf; |
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int fd; |
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if (strcmp(mtd, "linux") != 0) |
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return 1; |
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*len = read(imagefd, buf, 32); |
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if (*len < 32) { |
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fprintf(stdout, "Could not get image header, file too small (%d bytes)\n", *len); |
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return 0; |
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} |
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if (trx->magic != TRX_MAGIC || trx->len < sizeof(struct trx_header)) { |
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if (quiet < 2) { |
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fprintf(stderr, "Bad trx header\n"); |
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fprintf(stderr, "This is not the correct file format; refusing to flash.\n" |
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"Please specify the correct file or use -f to force.\n"); |
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} |
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return 0; |
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} |
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/* check if image fits to mtd device */ |
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fd = mtd_check_open(mtd); |
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if(fd < 0) { |
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fprintf(stderr, "Could not open mtd device: %s\n", mtd); |
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exit(1); |
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} |
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if(mtdsize < trx->len) { |
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fprintf(stderr, "Image too big for partition: %s\n", mtd); |
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close(fd); |
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return 0; |
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} |
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close(fd); |
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return 1; |
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} |
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