1 files changed, 370 insertions, 0 deletions
diff --git a/openwrt/package/mtd/mtd.c b/openwrt/package/mtd/mtd.c
new file mode 100644
index 0000000..74949fd
--- /dev/null
+++ b/openwrt/package/mtd/mtd.c
@@ -0,0 +1,370 @@
+/*
+ * mtd - simple memory technology device manipulation tool
+ *
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
+ *		      Felix Fietkau <nbd@vd-s.ath.cx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Id$
+ *
+ * code is based on linux-mtd example code
+ */
+
+#include <limits.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <error.h>
+#include <time.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/reboot.h>
+#include <string.h>
+
+#include <linux/mtd/mtd.h>
+
+#define TRX_MAGIC       0x30524448      /* "HDR0" */
+#define BUFSIZE (10 * 1024)
+#define MAX_ARGS 8
+
+struct trx_header {
+	uint32_t magic;		/* "HDR0" */
+	uint32_t len;		/* Length of file including header */
+	uint32_t crc32;		/* 32-bit CRC from flag_version to end of file */
+	uint32_t flag_version;	/* 0:15 flags, 16:31 version */
+	uint32_t offsets[3];    /* Offsets of partitions from start of header */
+};
+
+int
+trx_check(const char *trxfile, const char *mtd)
+{
+	struct mtd_info_user mtdInfo;
+	int trxfd, fd;
+	size_t count;
+	struct trx_header trx;
+	struct stat trxstat;
+
+	trxfd = open(trxfile,O_RDONLY);	
+	if(trxfd < 0) {
+		fprintf(stderr, "Could not open trx image: %s\n", trxfile);
+		exit(1);
+	}
+
+	if (fstat(trxfd,&trxstat) < 0) {
+		fprintf(stderr, "Could not get trx image file status: %s\n", trxfile);
+		close(trxfd);
+		exit(1);
+	}
+
+	count = read(trxfd, &trx, sizeof(struct trx_header));
+	if (count < sizeof(struct trx_header)) {
+		fprintf(stderr, "Could not trx header, file too small (%ld bytes)\n", count);
+		close(trxfd);
+		exit(1);
+	}
+
+	if (trx.magic != TRX_MAGIC || trx.len < sizeof(struct trx_header)) {
+		fprintf(stderr, "Bad trx header\n");
+		fprintf(stderr, "If this is a firmware in bin format, like some of the\n"
+				"original firmware files are, use following command to convert to trx:\n"
+				"dd if=firmware.bin of=firmware.trx bs=32 skip=1\n");
+		close(trxfd);
+		exit(1);
+	}
+	
+	lseek(trxfd, 0, SEEK_SET);
+
+	/* check if image fits to mtd device */
+
+	fd = mtd_open(mtd, O_RDWR);
+	if(fd < 0) {
+		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+		exit(1);
+	}
+
+	if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
+		fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
+		close(fd);
+		exit(1);
+	}
+		
+	if(mtdInfo.size < trxstat.st_size) {
+		fprintf(stderr, "Image too big for partition: %s\n", mtd);
+		close(trxfd);
+		close(fd);
+		exit(1);
+	}	
+	
+	printf("Writing %s to %s ...\n", trxfile, mtd);
+
+	close(fd);
+
+	return(trxfd);
+}
+
+int
+mtd_unlock(const char *mtd)
+{
+	int fd;
+	struct mtd_info_user mtdInfo;
+	struct erase_info_user mtdLockInfo;
+
+	fd = mtd_open(mtd, O_RDWR);
+	if(fd < 0) {
+		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+		exit(1);
+	}
+
+	if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
+		fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
+		close(fd);
+		exit(1);
+	}
+
+	printf("Unlocking %s ...\n", mtd);
+	mtdLockInfo.start = 0;
+	mtdLockInfo.length = mtdInfo.size;
+	if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
+		close(fd);
+		return 0;
+	}
+		
+	close(fd);
+	return 0;
+}
+
+int
+mtd_open(const char *mtd, int flags)
+{
+	FILE *fp;
+	char dev[PATH_MAX];
+	int i;
+
+	if ((fp = fopen("/proc/mtd", "r"))) {
+		while (fgets(dev, sizeof(dev), fp)) {
+			if (sscanf(dev, "mtd%d:", &i) && strstr(dev, mtd)) {
+				snprintf(dev, sizeof(dev), "/dev/mtd/%d", i);
+				fclose(fp);
+				return open(dev, flags);
+			}
+		}
+		fclose(fp);
+	}
+
+	return open(mtd, flags);
+}
+
+int
+mtd_erase(const char *mtd)
+{
+	int fd;
+	struct mtd_info_user mtdInfo;
+	struct erase_info_user mtdEraseInfo;
+
+	fd = mtd_open(mtd, O_RDWR);
+	if(fd < 0) {
+		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+		exit(1);
+	}
+
+	if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
+		fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
+		close(fd);
+		exit(1);
+	}
+
+	printf("Erasing %s ...\n", mtd);
+	mtdEraseInfo.length = mtdInfo.erasesize;
+
+	for (mtdEraseInfo.start = 0;
+		 mtdEraseInfo.start < mtdInfo.size;
+		 mtdEraseInfo.start += mtdInfo.erasesize) {
+		
+		ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
+		if(ioctl(fd, MEMERASE, &mtdEraseInfo)) {
+			fprintf(stderr, "Could not erase MTD device: %s\n", mtd);
+			close(fd);
+			exit(1);
+		}
+	}		
+
+	close(fd);
+	return 0;
+
+}
+
+int
+mtd_write(int trxfd, const char *mtd)
+{
+	int fd,i;
+	size_t result,size,written;
+	struct mtd_info_user mtdInfo;
+	struct erase_info_user mtdEraseInfo;
+	unsigned char src[BUFSIZE],dest[BUFSIZE];
+	struct stat trxstat;
+
+	if (fstat(trxfd,&trxstat) < 0) {
+		fprintf(stderr, "Could not get trx image file status\n");
+		close(trxfd);
+		exit(1);
+	}
+
+	fd = mtd_open(mtd, O_RDWR);
+	if(fd < 0) {
+		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+		exit(1);
+	}
+
+	if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
+		fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
+		close(fd);
+		exit(1);
+	}
+		
+	mtdEraseInfo.start = 0;
+	mtdEraseInfo.length = trxstat.st_size & ~(mtdInfo.erasesize -1);
+	if(trxstat.st_size % mtdInfo.erasesize) mtdEraseInfo.length += mtdInfo.erasesize;
+
+	/* erase the chunk */
+	if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
+		fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
+		exit(1);
+	}
+	
+	size = trxstat.st_size;
+	i = BUFSIZE;
+	written = 0;
+
+	while (size) {
+		if (size < BUFSIZE) i = size;
+		read(trxfd,src,i);
+		result = write(fd,src,i);
+		if (i != result) {
+			if (result < 0) {
+				fprintf(stderr,"Error while writing image");
+				exit(1);
+			}
+			fprintf(stderr,"Error writing image");
+			exit(1);
+		}
+		written += i;
+		size -= i;
+	}
+	
+	return 0;
+}
+
+void usage(void)
+{
+	printf("Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
+	"The device is in the format of mtdX (eg: mtd4) or its label.\n"
+	"mtd recognizes these commands:\n"
+	"	unlock			unlock the device\n"
+	"	erase			erase all data on device\n"
+	"	write <imagefile>	write imagefile to device\n"
+	"Following options are available:\n"
+	"	-r			reboot after successful command\n"
+	"	-e <device>		erase <device> before executing the command\n\n"
+	"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
+	"         mtd -r write linux.trx linux\n\n");
+	exit(1);
+}
+
+int main (int argc, char **argv)
+{
+	int ch, i, boot, unlock, trxfd;
+	char *erase[MAX_ARGS], *device;
+	enum {
+		CMD_ERASE,
+		CMD_WRITE,
+		CMD_UNLOCK
+	} cmd;
+	
+	erase[0] = NULL;
+	boot = 0;
+
+	while ((ch = getopt(argc, argv, "re:")) != -1)
+		switch (ch) {
+			case 'r':
+				boot = 1;
+				break;
+			case 'e':
+				i = 0;
+				while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
+					i++;
+					
+				erase[i++] = optarg;
+				erase[i] = NULL;
+				break;
+			
+			case '?':
+			default:
+				usage();
+		}
+	argc -= optind;
+	argv += optind;
+	
+	if (argc < 2)
+		usage();
+
+	if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
+		cmd = CMD_UNLOCK;
+		device = argv[1];
+	} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
+		cmd = CMD_ERASE;
+		device = argv[1];
+	} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
+		cmd = CMD_WRITE;
+		device = argv[2];
+		/* check trx file before erasing or writing anything */
+		trxfd = trx_check(argv[1], device);
+	} else {
+		usage();
+	}
+
+	sync();
+
+	i = 0;
+	while (erase[i] != NULL) {
+		mtd_unlock(erase[i]);
+		mtd_erase(erase[i]);
+		i++;
+	}
+	
+	mtd_unlock(device);
+
+	switch (cmd) {
+		case CMD_UNLOCK:
+			break;
+		case CMD_ERASE:
+			mtd_erase(device);
+			break;
+		case CMD_WRITE:
+			mtd_write(trxfd, device);
+			break;
+	}
+
+	if (boot)
+		kill(1, 15); // send SIGTERM to init for reboot
+
+	return 0;
+}