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-rw-r--r--tools/imls/imls.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/tools/imls/imls.c b/tools/imls/imls.c
new file mode 100644
index 000000000..b21c505d4
--- /dev/null
+++ b/tools/imls/imls.c
@@ -0,0 +1,270 @@
+/*
+ * (C) Copyright 2009 Marco Stornelli
+ *
+ * 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
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <asm/page.h>
+
+#ifdef MTD_OLD
+#include <stdint.h>
+#include <linux/mtd/mtd.h>
+#else
+#define __user /* nothing */
+#include <mtd/mtd-user.h>
+#endif
+
+#include <sha1.h>
+#include <fdt.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <image.h>
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+
+extern unsigned long crc32(unsigned long crc, const char *buf, unsigned int len);
+static void usage(void);
+static int image_verify_header(char *ptr, int fd);
+static int flash_bad_block(int fd, uint8_t mtd_type, loff_t start);
+
+char *cmdname;
+char *devicefile;
+
+unsigned int sectorcount = 0;
+int sflag = 0;
+unsigned int sectoroffset = 0;
+unsigned int sectorsize = 0;
+int cflag = 0;
+
+int main (int argc, char **argv)
+{
+ int fd = -1, err = 0, readbyte = 0, j;
+ struct mtd_info_user mtdinfo;
+ char buf[sizeof(image_header_t)];
+ int found = 0;
+
+ cmdname = *argv;
+
+ while (--argc > 0 && **++argv == '-') {
+ while (*++*argv) {
+ switch (**argv) {
+ case 'c':
+ if (--argc <= 0)
+ usage ();
+ sectorcount = (unsigned int)atoi(*++argv);
+ cflag = 1;
+ goto NXTARG;
+ case 'o':
+ if (--argc <= 0)
+ usage ();
+ sectoroffset = (unsigned int)atoi(*++argv);
+ goto NXTARG;
+
+ case 's':
+ if (--argc <= 0)
+ usage ();
+ sectorsize = (unsigned int)atoi(*++argv);
+ sflag = 1;
+ goto NXTARG;
+ default:
+ usage ();
+ }
+ }
+NXTARG: ;
+ }
+
+ if (argc != 1 || cflag == 0 || sflag == 0)
+ usage();
+
+ devicefile = *argv;
+
+ fd = open(devicefile, O_RDONLY);
+ if (fd < 0) {
+ fprintf (stderr, "%s: Can't open %s: %s\n",
+ cmdname, devicefile, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ err = ioctl(fd, MEMGETINFO, &mtdinfo);
+ if (err < 0) {
+ fprintf(stderr, "%s: Cannot get MTD information: %s\n",cmdname,
+ strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ if (mtdinfo.type != MTD_NORFLASH && mtdinfo.type != MTD_NANDFLASH) {
+ fprintf(stderr, "%s: Unsupported flash type %u\n",
+ cmdname, mtdinfo.type);
+ exit(EXIT_FAILURE);
+ }
+
+ if (sectorsize * sectorcount != mtdinfo.size) {
+ fprintf(stderr, "%s: Partition size (%d) incompatible with "
+ "sector size and count\n", cmdname, mtdinfo.size);
+ exit(EXIT_FAILURE);
+ }
+
+ if (sectorsize * sectoroffset >= mtdinfo.size) {
+ fprintf(stderr, "%s: Partition size (%d) incompatible with "
+ "sector offset given\n", cmdname, mtdinfo.size);
+ exit(EXIT_FAILURE);
+ }
+
+ if (sectoroffset > sectorcount - 1) {
+ fprintf(stderr, "%s: Sector offset cannot be grater than "
+ "sector count minus one\n", cmdname);
+ exit(EXIT_FAILURE);
+ }
+
+ printf("Searching....\n");
+
+ for (j = sectoroffset; j < sectorcount; ++j) {
+
+ if (lseek(fd, j*sectorsize, SEEK_SET) != j*sectorsize) {
+ fprintf(stderr, "%s: lseek failure: %s\n",
+ cmdname, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ err = flash_bad_block(fd, mtdinfo.type, j*sectorsize);
+ if (err < 0)
+ exit(EXIT_FAILURE);
+ if (err)
+ continue; /* Skip and jump to next */
+
+ readbyte = read(fd, buf, sizeof(image_header_t));
+ if (readbyte != sizeof(image_header_t)) {
+ fprintf(stderr, "%s: Can't read from device: %s\n",
+ cmdname, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ if (fdt_check_header(buf)) {
+ /* old-style image */
+ if (image_verify_header(buf, fd)) {
+ found = 1;
+ image_print_contents((image_header_t *)buf);
+ }
+ } else {
+ /* FIT image */
+ fit_print_contents(buf);
+ }
+
+ }
+
+ close(fd);
+
+ if(!found)
+ printf("No images found\n");
+
+ exit(EXIT_SUCCESS);
+}
+
+void usage()
+{
+ fprintf (stderr, "Usage:\n"
+ " %s [-o offset] -s size -c count device\n"
+ " -o ==> number of sectors to use as offset\n"
+ " -c ==> number of sectors\n"
+ " -s ==> size of sectors (byte)\n",
+ cmdname);
+
+ exit(EXIT_FAILURE);
+}
+
+static int image_verify_header(char *ptr, int fd)
+{
+ int len, nread;
+ char *data;
+ uint32_t checksum;
+ image_header_t *hdr = (image_header_t *)ptr;
+ char buf[PAGE_SIZE];
+
+ if (image_get_magic(hdr) != IH_MAGIC)
+ return 0;
+
+ data = (char *)hdr;
+ len = image_get_header_size();
+
+ checksum = image_get_hcrc(hdr);
+ hdr->ih_hcrc = htonl(0); /* clear for re-calculation */
+
+ if (crc32(0, data, len) != checksum) {
+ fprintf(stderr,
+ "%s: Maybe image found but it has bad header checksum!\n",
+ cmdname);
+ return 0;
+ }
+
+ len = image_get_size(hdr);
+ checksum = 0;
+
+ while (len > 0) {
+ nread = read(fd, buf, MIN(len,PAGE_SIZE));
+ if (nread != MIN(len,PAGE_SIZE)) {
+ fprintf(stderr,
+ "%s: Error while reading: %s\n",
+ cmdname, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ checksum = crc32(checksum, buf, nread);
+ len -= nread;
+ }
+
+ if (checksum != image_get_dcrc(hdr)) {
+ fprintf (stderr,
+ "%s: Maybe image found but it has corrupted data!\n",
+ cmdname);
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * Test for bad block on NAND, just returns 0 on NOR, on NAND:
+ * 0 - block is good
+ * > 0 - block is bad
+ * < 0 - failed to test
+ */
+static int flash_bad_block(int fd, uint8_t mtd_type, loff_t start)
+{
+ if (mtd_type == MTD_NANDFLASH) {
+ int badblock = ioctl(fd, MEMGETBADBLOCK, &start);
+
+ if (badblock < 0) {
+ fprintf(stderr,"%s: Cannot read bad block mark: %s\n",
+ cmdname, strerror(errno));
+ return badblock;
+ }
+
+ if (badblock) {
+ return badblock;
+ }
+ }
+
+ return 0;
+}
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