--- a/loadtools/flmisc.c	Tue Jun 17 01:52:46 2014 +0000
+++ b/loadtools/flmisc.c	Tue Jun 17 03:18:02 2014 +0000
@@ -248,3 +248,64 @@
 	bi = flash_bank_info + bank;
 	return bi->ops->status_cmd(bi);
 }
+
+flashcmd_unlock(argc, argv, bank)
+	char **argv;
+{
+	struct flash_bank_info *bi;
+	u_long offset, len;
+	char *strtoul_endp;
+	struct sector_info *startsec, *endsec, *sp;
+	int stat;
+
+	if (flash_get_cfi(bank) < 0)
+		return(-1);
+	bi = flash_bank_info + bank;
+	if (!bi->ops->needs_unlock) {
+		fprintf(stderr,
+	    "This operation is not applicable to the selected flash type\n");
+		return(-1);
+	}
+	if (argc != 4) {
+inv:		fprintf(stderr, "usage: %s %s hex-start-offset hex-length\n",
+			argv[0], argv[1]);
+		return(-1);
+	}
+	offset = strtoul(argv[2], &strtoul_endp, 16);
+	if (*strtoul_endp)
+		goto inv;
+	if (offset >= bi->geom->total_size) {
+		fprintf(stderr,
+		"error: specified offset exceeds flash bank size (0x%lx)\n",
+			(u_long) bi->geom->total_size);
+		return(-1);
+	}
+	len = strtoul(argv[3], &strtoul_endp, 16);
+	if (*strtoul_endp)
+		goto inv;
+	if (len > bi->geom->total_size - offset) {
+		fprintf(stderr,
+	"error: specified offset+length exceed flash bank size (0x%lx)\n",
+			(u_long) bi->geom->total_size);
+		return(-1);
+	}
+	if (!len) {
+		printf("Zero length specified - nothing to do!\n");
+		return(0);
+	}
+	/* now enforce sector alignment for both offset and length */
+	if (get_flash_sector_table(bank) < 0)
+		return(-1);
+	if (get_flash_sector_range(bi, offset, len, &startsec, &endsec) < 0)
+		return(-1);
+	printf("Unlocking %d sector(s)\n", endsec - startsec);
+	for (sp = startsec; sp < endsec; sp++) {
+		stat = bi->ops->unlock_sector(bi, sp);
+		if (stat)
+			return(stat);
+		putchar('.');
+		fflush(stdout);
+	}
+	putchar('\n');
+	return(0);
+}