From 72212c137c574b564723327af751c4054c7cfca6 Mon Sep 17 00:00:00 2001
From: David Woodhouse <dwmw2@shinybook.infradead.org>
Date: Tue, 11 Apr 2006 19:09:16 -0400
Subject: Initial commit

---
 rfdformat.c | 160 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 rfdformat.c

(limited to 'rfdformat.c')

diff --git a/rfdformat.c b/rfdformat.c
new file mode 100644
index 0000000..ee84a21
--- /dev/null
+++ b/rfdformat.c
@@ -0,0 +1,160 @@
+/*
+ * rfdformat.c
+ *
+ * Copyright (C) 2005 Sean Young <sean@mess.org>
+ *
+ * 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.
+ *
+ * $Id: rfdformat.c,v 1.3 2005/11/07 11:15:14 gleixner Exp $
+ *
+ * This is very easy: just erase all the blocks and put the magic at
+ * the beginning of each block.
+ */
+
+#define _XOPEN_SOURCE 500 /* For pread/pwrite */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include <mtd/mtd-user.h>
+#include <linux/types.h>
+
+#define PROGRAM "rfdformat"
+#define VERSION "$Revision 1.0 $"
+
+void display_help(void)
+{
+	printf("Usage: " PROGRAM " [OPTIONS] MTD-device\n"
+	       "Formats NOR flash for resident flash disk\n"
+	       "\n"
+	       "-h         --help               display this help and exit\n"
+	       "-V         --version            output version information and exit\n");
+	exit(0);
+}
+
+void display_version(void)
+{
+        printf(PROGRAM " " VERSION "\n"
+               "\n"
+	       "This is free software; see the source for copying conditions.  There is NO\n"
+	       "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
+
+        exit(0);
+}
+
+void process_options(int argc, char *argv[], const char **mtd_filename)
+{
+	int error = 0;
+
+	for (;;) {
+		int option_index = 0;
+		static const char *short_options = "hV";
+		static const struct option long_options[] = {
+			{ "help", no_argument, 0, 'h' },
+			{ "version", no_argument, 0, 'V', },
+			{ NULL, 0, 0, 0 }
+		};
+
+		int c = getopt_long(argc, argv, short_options,
+				long_options, &option_index);
+		if (c == EOF)
+			break;
+
+		switch (c) {
+		case 'h':
+			display_help();
+			break;
+		case 'V':
+			display_version();
+			break;
+		case '?':
+			error = 1;
+			break;
+		}
+	}
+
+	if ((argc - optind) != 1 || error)
+		display_help();
+
+	*mtd_filename = argv[optind];
+}
+
+int main(int argc, char *argv[])
+{
+	static const __u8 magic[] = { 0x93, 0x91 };
+	int fd, block_count, i;
+	struct mtd_info_user mtd_info;
+	char buf[512];
+	const char *mtd_filename;
+
+	process_options(argc, argv, &mtd_filename);
+
+	fd = open(mtd_filename, O_RDWR);
+	if (fd == -1) {
+		perror(mtd_filename);
+		return 1;
+	}
+
+	if (ioctl(fd, MEMGETINFO, &mtd_info)) {
+		perror(mtd_filename);
+		close(fd);
+		return 1;
+	}
+
+	if (mtd_info.type != MTD_NORFLASH) {
+		fprintf(stderr, "%s: not NOR flash\n", mtd_filename);
+		close(fd);
+		return 2;
+	}
+
+	if (mtd_info.size > 32*1024*1024) {
+		fprintf(stderr, "%s: flash larger than 32MiB not supported\n",
+				mtd_filename);
+		close(fd);
+		return 2;
+	}
+
+	block_count = mtd_info.size / mtd_info.erasesize;
+
+	if (block_count < 2) {
+		fprintf(stderr, "%s: at least two erase units required\n",
+				mtd_filename);
+		close(fd);
+		return 2;
+	}
+
+	for (i=0; i<block_count; i++) {
+		struct erase_info_user erase_info;
+
+		erase_info.start = i * mtd_info.erasesize;
+		erase_info.length = mtd_info.erasesize;
+
+		if (ioctl(fd, MEMERASE, &erase_info) != 0) {
+			snprintf(buf, sizeof(buf), "%s: erase", mtd_filename);
+			perror(buf);
+			close(fd);
+			return 2;
+		}
+
+		if (pwrite(fd, magic, sizeof(magic), i * mtd_info.erasesize)
+				!= sizeof(magic)) {
+			snprintf(buf, sizeof(buf), "%s: write", mtd_filename);
+			perror(buf);
+			close(fd);
+			return 2;
+		}
+	}
+
+	close(fd);
+
+	return 0;
+}
-- 
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