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-rw-r--r--package/cfgfs/src/mtd.c379
1 files changed, 379 insertions, 0 deletions
diff --git a/package/cfgfs/src/mtd.c b/package/cfgfs/src/mtd.c
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index 000000000..6812c5e31
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+++ b/package/cfgfs/src/mtd.c
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+/*
+ * mtd - simple memory technology device manipulation tool
+ *
+ * Copyright (c) 2006, 2007 Thorsten Glaser <tg@freewrt.org>
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@freewrt.org>,
+ * Felix Fietkau <nbd@openwrt.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.
+ *
+ * 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.
+ *
+ * The code is based on the linux-mtd examples.
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+#include <limits.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <error.h>
+#include <err.h>
+#include <time.h>
+#include <string.h>
+
+#include <mtd/mtd-user.h>
+
+#define BUFSIZE (16 * 1024)
+#define MAX_ARGS 8
+
+#define DEBUG
+
+int mtd_check(char *);
+int mtd_unlock(const char *);
+int mtd_open(const char *, int);
+int mtd_erase(const char *);
+int mtd_write(int, const char *, int, bool);
+void usage(void) __attribute__((noreturn));
+
+char buf[BUFSIZE];
+int buflen;
+
+int
+mtd_check(char *mtd)
+{
+ struct mtd_info_user mtdInfo;
+ int fd;
+
+ fd = mtd_open(mtd, O_RDWR | O_SYNC);
+ if(fd < 0) {
+ fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+ return 0;
+ }
+
+ if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
+ fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
+ close(fd);
+ return 0;
+ }
+
+ close(fd);
+ return 1;
+}
+
+int
+mtd_unlock(const char *mtd)
+{
+ int fd;
+ struct mtd_info_user mtdInfo;
+ struct erase_info_user mtdLockInfo;
+
+ fd = mtd_open(mtd, O_RDWR | O_SYNC);
+ 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);
+ }
+
+ 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 | O_SYNC);
+ 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.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 imagefd, const char *mtd, int quiet, bool do_erase)
+{
+ int fd, result;
+ size_t r, w, e;
+ struct mtd_info_user mtdInfo;
+ struct erase_info_user mtdEraseInfo;
+
+ fd = mtd_open(mtd, O_RDWR | O_SYNC);
+ 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);
+ }
+
+ r = w = e = 0;
+ if (!quiet)
+ fprintf(stderr, " [ ]");
+
+ for (;;) {
+ /* buffer may contain data already (from trx check) */
+ r = buflen;
+ r += read(imagefd, buf + buflen, BUFSIZE - buflen);
+ w += r;
+
+ /* EOF */
+ if (r <= 0) break;
+
+ /* need to erase the next block before writing data to it */
+ while (do_erase && w > e) {
+ mtdEraseInfo.start = e;
+ mtdEraseInfo.length = mtdInfo.erasesize;
+
+ if (!quiet)
+ fprintf(stderr, "\b\b\b[e]");
+ /* erase the chunk */
+ if (ioctl (fd,MEMERASE,&mtdEraseInfo) < 0) {
+ fprintf(stderr, "Erasing mtd failed: %s\n", mtd);
+ exit(1);
+ }
+ e += mtdInfo.erasesize;
+ }
+
+ if (!quiet)
+ fprintf(stderr, "\b\b\b[w]");
+
+ if ((result = write(fd, buf, r)) < (ssize_t)r) {
+ if (result < 0) {
+ fprintf(stderr, "Error writing image.\n");
+ exit(1);
+ } else {
+ fprintf(stderr, "Insufficient space.\n");
+ exit(1);
+ }
+ }
+
+ buflen = 0;
+ }
+ if (!quiet)
+ fprintf(stderr, "\b\b\b\b");
+
+ close(fd);
+ return 0;
+}
+
+void
+usage(void)
+{
+ fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
+ "The device is in the format of mtdX (eg: mtd4) or its label.\n"
+ "mtd recognises these commands:\n"
+ " unlock unlock the device\n"
+ " erase erase all data on device\n"
+ " write <imagefile>|- write <imagefile> (use - for stdin) to device\n"
+ "Following options are available:\n"
+ " -q quiet mode (once: no [w] on writing,\n"
+ " twice: no status messages)\n"
+ " -e <device> erase <device> before executing the command\n\n"
+ "Example: To write linux.trx to mtd1 labeled as linux\n"
+ " mtd write linux.trx linux\n\n");
+ exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+ int ch, i, imagefd = -1, quiet, unlocked;
+ char *erase[MAX_ARGS], *device;
+ const char *imagefile = NULL;
+ enum {
+ CMD_ERASE,
+ CMD_WRITE,
+ CMD_UNLOCK
+ } cmd;
+
+ erase[0] = NULL;
+ buflen = 0;
+ quiet = 0;
+
+ while ((ch = getopt(argc, argv, "Fqe:")) != -1)
+ switch (ch) {
+ case 'F':
+ quiet = 1;
+ /* FALLTHROUGH */
+ case 'q':
+ quiet++;
+ 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];
+
+ if (strcmp(argv[1], "-") == 0) {
+ imagefile = "<stdin>";
+ imagefd = 0;
+ } else {
+ imagefile = argv[1];
+ if ((imagefd = open(argv[1], O_RDONLY)) < 0) {
+ fprintf(stderr, "Couldn't open image file: %s!\n", imagefile);
+ exit(1);
+ }
+ }
+
+ if (!mtd_check(device)) {
+ fprintf(stderr, "Can't open device for writing!\n");
+ exit(1);
+ }
+ } else {
+ usage();
+ }
+
+ sync();
+
+ i = 0;
+ unlocked = 0;
+ while (erase[i] != NULL) {
+ if (quiet < 2)
+ fprintf(stderr, "Unlocking %s ...\n", erase[i]);
+ mtd_unlock(erase[i]);
+ if (quiet < 2)
+ fprintf(stderr, "Erasing %s ...\n", erase[i]);
+ mtd_erase(erase[i]);
+ if (strcmp(erase[i], device) == 0)
+ /* this means that <device> is unlocked and erased */
+ unlocked = 1;
+ i++;
+ }
+
+ if (!unlocked) {
+ if (quiet < 2)
+ fprintf(stderr, "Unlocking %s ...\n", device);
+ mtd_unlock(device);
+ }
+
+ switch (cmd) {
+ case CMD_UNLOCK:
+ break;
+ case CMD_ERASE:
+ if (unlocked) {
+ fprintf(stderr, "Already erased: %s\n", device);
+ break;
+ }
+ if (quiet < 2)
+ fprintf(stderr, "Erasing %s ...\n", device);
+ mtd_erase(device);
+ break;
+ case CMD_WRITE:
+ if (quiet < 2)
+ fprintf(stderr, "Writing from %s to %s ... ", imagefile, device);
+ mtd_write(imagefd, device, quiet, (unlocked == 0));
+ if (quiet < 2)
+ fprintf(stderr, "\n");
+ break;
+ }
+
+ sync();
+ return 0;
+}
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