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-rw-r--r--common/cmd_nand.c44
1 files changed, 38 insertions, 6 deletions
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 41aaf7f..dcccc19 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -449,14 +449,40 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
- if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
+ if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
nand_erase_options_t opts;
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > 2 && !strcmp("clean", argv[2]);
int o = clean ? 3 : 2;
- int scrub = !strcmp(cmd, "scrub");
+ int scrub = !strncmp(cmd, "scrub", 5);
+ int part = 0;
+ int chip = 0;
+ int spread = 0;
+ int args = 2;
+
+ if (cmd[5] != 0) {
+ if (!strcmp(&cmd[5], ".spread")) {
+ spread = 1;
+ } else if (!strcmp(&cmd[5], ".part")) {
+ part = 1;
+ args = 1;
+ } else if (!strcmp(&cmd[5], ".chip")) {
+ chip = 1;
+ args = 0;
+ } else {
+ goto usage;
+ }
+ }
+
+ /*
+ * Don't allow missing arguments to cause full chip/partition
+ * erases -- easy to do accidentally, e.g. with a misspelled
+ * variable name.
+ */
+ if (argc != o + args)
+ goto usage;
- printf("\nNAND %s: ", scrub ? "scrub" : "erase");
+ printf("\nNAND %s: ", cmd);
/* skip first two or three arguments, look for offset and size */
if (arg_off_size(argc - o, argv + o, &dev, &off, &size) != 0)
return 1;
@@ -468,6 +494,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
+ opts.spread = spread;
if (scrub) {
puts("Warning: "
@@ -648,11 +675,16 @@ U_BOOT_CMD(
"nand write - addr off|partition size\n"
" read/write 'size' bytes starting at offset 'off'\n"
" to/from memory address 'addr', skipping bad blocks.\n"
- "nand erase [clean] [off size] - erase 'size' bytes from\n"
- " offset 'off' (entire device if not specified)\n"
+ "nand erase[.spread] [clean] [off [size]] - erase 'size' bytes "
+ "from offset 'off'\n"
+ " With '.spread', erase enough for given file size, otherwise,\n"
+ " 'size' includes skipped bad blocks.\n"
+ "nand erase.part [clean] partition - erase entire mtd partition'\n"
+ "nand erase.chip [clean] - erase entire chip'\n"
"nand bad - show bad blocks\n"
"nand dump[.oob] off - dump page\n"
- "nand scrub - really clean NAND erasing bad blocks (UNSAFE)\n"
+ "nand scrub off size | scrub.part partition | scrub.chip\n"
+ " really clean NAND erasing bad blocks (UNSAFE)\n"
"nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
"nand biterr off - make a bit error at offset (UNSAFE)"
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK