nand commands: make only "dump" repeatable.

The dump command is made to increment its address on repeat,
as md does.  Other commands do not make sense to issue repeatedly,
and can be irritating when it happens accidentally, so don't.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Tested-by: NBen Gardiner <bengardiner@nanometrics.ca>

common/cmd_nand.c

@@ -37,10 +37,16 @@ int find_dev_and_part(const char *id, struct mtd_device **dev,
 		      u8 *part_num, struct part_info **part);
 #endif
 
-static int nand_dump(nand_info_t *nand, ulong off, int only_oob)
+static int nand_dump(nand_info_t *nand, ulong off, int only_oob, int repeat)
 {
 	int i;
 	u_char *datbuf, *oobbuf, *p;
+	static loff_t last;
+
+	if (repeat)
+		off = last + nand->writesize;
+
+	last = off;
 
 	datbuf = malloc(nand->writesize + nand->oobsize);
 	oobbuf = malloc(nand->oobsize);
@@ -381,6 +387,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 #endif
 	const char *quiet_str = getenv("quiet");
 	int dev = nand_curr_device;
+	int repeat = flag & CMD_FLAG_REPEAT;
 
 	/* at least two arguments please */
 	if (argc < 2)
@@ -391,6 +398,10 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 
 	cmd = argv[1];
 
+	/* Only "dump" is repeatable. */
+	if (repeat && strcmp(cmd, "dump"))
+		return 0;
+
 	if (strcmp(cmd, "info") == 0) {
 
 		putc('\n');
@@ -532,16 +543,10 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 		if (argc < 3)
 			goto usage;
 
-		s = strchr(cmd, '.');
 		off = (int)simple_strtoul(argv[2], NULL, 16);
-
-		if (s != NULL && strcmp(s, ".oob") == 0)
-			ret = nand_dump(nand, off, 1);
-		else
-			ret = nand_dump(nand, off, 0);
+		ret = nand_dump(nand, off, !strcmp(&cmd[4], ".oob"), repeat);
 
 		return ret == 0 ? 1 : 0;
-
 	}
 
 	if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {