nandwrite: implement -n (read/write without ecc)

Implement -n (read/write without ecc).

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 14 insertions, 8 deletions

diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
index 247fc72f4..c95cbb21e 100644
--- a/miscutils/nandwrite.c
+++ b/miscutils/nandwrite.c
@@ -29,16 +29,18 @@
 //kbuild:lib-$(CONFIG_NANDDUMP) += nandwrite.o
 
 //usage:#define nandwrite_trivial_usage
-//usage:        "[-p] [-s ADDR] MTD_DEVICE [FILE]"
+//usage:        "[-np] [-s ADDR] MTD_DEVICE [FILE]"
 //usage:#define nandwrite_full_usage "\n\n"
 //usage:        "Write to MTD_DEVICE\n"
+//usage:     "\n        -n      Write without ecc"
 //usage:     "\n        -p      Pad to page size"
 //usage:     "\n        -s ADDR Start address"
 
 //usage:#define nanddump_trivial_usage
-//usage:        "[-o]" IF_LONG_OPTS(" [--bb=padbad|skipbad]") " [-s ADDR] [-l LEN] [-f FILE] MTD_DEVICE"
+//usage:        "[-no]" IF_LONG_OPTS(" [--bb=padbad|skipbad]") " [-s ADDR] [-l LEN] [-f FILE] MTD_DEVICE"
 //usage:#define nanddump_full_usage "\n\n"
 //usage:        "Dump MTD_DEVICE\n"
+//usage:     "\n        -n      Read without ecc"
 //usage:     "\n        -o      Dump oob data"
 //usage:     "\n        -s ADDR Start address"
 //usage:     "\n        -l LEN  Length"
@@ -57,10 +59,11 @@
 
 #define OPT_p  (1 << 0) /* nandwrite only */
 #define OPT_o  (1 << 0) /* nanddump only */
-#define OPT_s  (1 << 1)
-#define OPT_f  (1 << 2)
-#define OPT_l  (1 << 3)
-#define OPT_bb (1 << 4) /* must be the last one in the list */
+#define OPT_n  (1 << 1)
+#define OPT_s  (1 << 2)
+#define OPT_f  (1 << 3)
+#define OPT_l  (1 << 4)
+#define OPT_bb (1 << 5) /* must be the last one in the list */
 
 #define BB_PADBAD (1 << 0)
 #define BB_SKIPBAD (1 << 1)
@@ -125,10 +128,10 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
                 applet_long_options =
                         "bb\0" Required_argument "\xff"; /* no short equivalent */
 #endif
-                opts = getopt32(argv, "os:f:l:", &opt_s, &opt_f, &opt_l, &opt_bb);
+                opts = getopt32(argv, "ons:f:l:", &opt_s, &opt_f, &opt_l, &opt_bb);
         } else { /* nandwrite */
                 opt_complementary = "-1:?2";
-                opts = getopt32(argv, "ps:", &opt_s);
+                opts = getopt32(argv, "pns:", &opt_s);
         }
         argv += optind;
 
@@ -144,6 +147,9 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
         fd = xopen(argv[0], IS_NANDWRITE ? O_RDWR : O_RDONLY);
         xioctl(fd, MEMGETINFO, &meminfo);
 
+        if (opts & OPT_n)
+                xioctl(fd, MTDFILEMODE, (void *)MTD_FILE_MODE_RAW);
+
         mtdoffset = xstrtou(opt_s, 0);
         if (IS_NANDDUMP && (opts & OPT_l)) {
                 unsigned length = xstrtou(opt_l, 0);