[tools] Add firmware tool for generating factory images for Edimax devices

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28688 3c298f89-4303-0410-b956-a3cf2f4a3e73

tools/firmware-utils/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2008 OpenWrt.org
+# Copyright (C) 2006-2011 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -54,6 +54,7 @@ define Host/Compile
 	$(call cc,buffalo-tag buffalo-lib, -Wall)
 	$(call cc,buffalo-tftp buffalo-lib, -Wall)
 	$(call cc,mkwrgimg md5, -Wall)
+	$(call cc,mkedimaximg)
 endef
 
 define Host/Install

tools/firmware-utils/src/mkedimaximg.c

@@ -0,0 +1,259 @@
+/*
+ * Copyright (C) 2011 Vasilis Tsiligiannis <b_tsiligiannis@silverton.gr>
+ *
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libgen.h>
+#include <getopt.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <endian.h>	/* for __BYTE_ORDER */
+
+#if (__BYTE_ORDER == __LITTLE_ENDIAN)
+#  define HOST_TO_LE16(x)	(x)
+#  define HOST_TO_LE32(x)	(x)
+#else
+#  define HOST_TO_LE16(x)	bswap_16(x)
+#  define HOST_TO_LE32(x)	bswap_32(x)
+#endif
+
+struct header
+{
+    unsigned char sign[4];
+    unsigned int start;
+    unsigned int flash;
+    unsigned char model[4];
+    unsigned int size;
+} __attribute__ ((packed));
+
+struct finfo
+{
+    char *name;
+    off_t size;
+};
+
+struct buf
+{
+    char *start;
+    size_t size;
+};
+
+static char *progname;
+
+static void usage(int status)
+{
+    FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
+
+    fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
+    fprintf(stream,
+	    "\n"
+	    "Options:\n"
+	    "  -s <sig>        set image signature to <sig>\n"
+	    "  -m <model>      set model to <model>\n"
+	    "  -i <file>       read input from file <file>\n"
+	    "  -o <file>       write output to file <file>\n"
+	    "  -f <flash>      set flash address to <flash>\n"
+	    "  -S <start>      set start address to <start>\n");
+
+    exit(status);
+}
+
+static int strtou32(char *arg, unsigned int *val)
+{
+    char *endptr = NULL;
+
+    errno = 0;
+    *val = strtoul(arg, &endptr, 0);
+    if (errno || (endptr == arg) || (*endptr && (endptr != NULL))) {
+	return EXIT_SUCCESS;
+    }
+
+    return EXIT_FAILURE;
+}
+
+static unsigned short fwcsum (struct buf *buf) {
+    int i;
+    unsigned short ret = 0;
+
+    for (i = 0; i < buf->size / 2; i++)
+	ret -= ((unsigned short *) buf->start)[i];
+    
+    return ret;
+}
+
+static int fwread(struct finfo *finfo, struct buf *buf)
+{
+    FILE *f;
+    
+    f = fopen(finfo->name, "r");
+    if (!f) {
+	fprintf(stderr, "could not open \"%s\" for reading\n", finfo->name);
+	usage(EXIT_FAILURE);
+    }
+
+    buf->size = fread(buf->start, 1, finfo->size, f);
+    if (buf->size != finfo->size) {
+	fprintf(stderr, "unable to read from file \"%s\"\n", finfo->name);
+	usage(EXIT_FAILURE);
+    }
+
+    fclose(f);
+
+    return EXIT_SUCCESS;
+}
+
+static int fwwrite(struct finfo *finfo, struct buf *buf)
+{
+    FILE *f;
+
+    f = fopen(finfo->name, "w");
+    if (!f) {
+	fprintf(stderr, "could not open \"%s\" for writing\n", finfo->name);
+	usage(EXIT_FAILURE);
+    }
+
+    buf->size = fwrite(buf->start, 1, finfo->size, f);
+    if (buf->size != finfo->size) {
+	fprintf(stderr, "unable to write to file \"%s\"\n", finfo->name);
+	usage(EXIT_FAILURE);
+    }
+
+    fclose(f);
+
+    return EXIT_SUCCESS;
+}	
+  
+int main(int argc, char **argv)
+{
+    struct stat st;
+    struct header header;
+    struct buf ibuf, obuf;
+    struct finfo ifinfo, ofinfo;
+    unsigned short csum;
+    int c;
+
+    ifinfo.name = ofinfo.name = NULL;
+    header.flash = header.size = header.start = 0;
+    progname = basename(argv[0]);
+
+    while((c = getopt(argc, argv, "i:o:m:s:f:S:h")) != -1) {
+	switch (c) {
+	case 'i':
+	    ifinfo.name = optarg;
+	    break;
+	case 'o':
+	    ofinfo.name = optarg;
+	    break;
+	case 'm':
+	    if (strlen(optarg) != 4) {
+		fprintf(stderr, "model must be 4 characters long\n");
+		usage(EXIT_FAILURE);
+	    }
+	    memcpy(header.model, optarg, 4);
+	    break;
+	case 's':
+	    if (strlen(optarg) != 4) {
+		fprintf(stderr, "signature must be 4 characters long\n");
+		usage(EXIT_FAILURE);
+	    }
+	    memcpy(header.sign, optarg, 4);
+	    break;
+	case 'h':
+	    usage(EXIT_SUCCESS);
+	    break;
+	case 'f':
+	    if (!strtou32(optarg, &header.flash)) {
+		fprintf(stderr, "invalid flash address specified\n");
+		usage(EXIT_FAILURE);
+	    }
+	    break;
+	case 'S':
+	    if (!strtou32(optarg, &header.start)) {
+		fprintf(stderr, "invalid start address specified\n");
+		usage(EXIT_FAILURE);
+	    }
+	    break;
+	default:
+	    usage(EXIT_FAILURE);
+	    break;
+	}
+    }
+
+    if (ifinfo.name == NULL) {
+	fprintf(stderr, "no input file specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    if (ofinfo.name == NULL) {
+	fprintf(stderr, "no output file specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    if (stat(ifinfo.name, &st)) {
+	fprintf(stderr, "stat failed on %s\n", ifinfo.name);
+	usage(EXIT_FAILURE);
+    }
+
+    if (header.sign == NULL) {
+	fprintf(stderr, "no signature specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    if (header.model == NULL) {
+	fprintf(stderr, "no model specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    if (!header.flash) {
+	fprintf(stderr, "no flash address specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    if (!header.start) {
+	fprintf(stderr, "no start address specified\n");
+	usage(EXIT_FAILURE);
+    }
+
+    ifinfo.size = st.st_size;
+
+    obuf.size = ifinfo.size + sizeof(struct header) + sizeof(unsigned short);
+    if (obuf.size % sizeof(unsigned short))
+	obuf.size++;
+
+    obuf.start = malloc(obuf.size);
+    if (!obuf.start) {
+	fprintf(stderr, "no memory for buffer\n");
+	usage(EXIT_FAILURE);
+    }
+    memset(obuf.start, 0, obuf.size);
+
+    ibuf.size = ifinfo.size;
+    ibuf.start = obuf.start + sizeof(struct header);
+    
+    if (fwread(&ifinfo, &ibuf))
+	usage(EXIT_FAILURE);
+
+    header.flash = HOST_TO_LE32(header.flash);
+    header.size = HOST_TO_LE32(obuf.size - sizeof(struct header));
+    header.start = HOST_TO_LE32(header.start);
+    memcpy (obuf.start, &header, sizeof(struct header));
+
+    csum = HOST_TO_LE16(fwcsum(&ibuf));
+    memcpy(obuf.start + obuf.size - sizeof(unsigned short),
+	   &csum, sizeof(unsigned short));
+
+    ofinfo.size = obuf.size;
+
+    if (fwwrite(&ofinfo, &obuf))
+	usage(EXIT_FAILURE);
+
+    return EXIT_SUCCESS;
+}