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authorMike Crowe <mac@mcrowe.com>2017-01-17 11:54:03 +0000
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2017-01-18 14:42:10 +0100
commit2fc8058291e07f6ec143179db377a7d53f6dfa04 (patch)
tree21e16ebac66bc7df3b99f746c95a176b15703b99
parent6df83fd628ece2a44da325951bbfc5c33e3c6866 (diff)
nandwrite: Add --skip-bad-blocks-to-start option
The --skip-bad-blocks-to-start option will increase the seek offset by the size of each bad block encountered between the start of the partition and the specified start address. This can be useful when writing part way through a partition that will be read using a simple bad-block-skipping algorithm. Signed-off-by: Mike Crowe <mac@mcrowe.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
-rw-r--r--nand-utils/nandwrite.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/nand-utils/nandwrite.c b/nand-utils/nandwrite.c
index c7a53d1..f29fc67 100644
--- a/nand-utils/nandwrite.c
+++ b/nand-utils/nandwrite.c
@@ -56,6 +56,8 @@ static void display_help(int status)
" -o, --oob Input contains oob data\n"
" -O, --onlyoob Input contains oob data and only write the oob part\n"
" -s addr, --start=addr Set output start address (default is 0)\n"
+" --skip-bad-blocks-to-start"
+" Skip bad blocks when seeking to the start address\n"
" -p, --pad Pad writes to page size\n"
" -b, --blockalign=1|2|4 Set multiple of eraseblocks to align to\n"
" --input-skip=length Skip |length| bytes of the input file\n"
@@ -96,6 +98,7 @@ static bool autoplace = false;
static bool skipallffs = false;
static bool noskipbad = false;
static bool pad = false;
+static bool skip_bad_blocks_to_start = false;
static int blockalign = 1; /* default to using actual block size */
static void process_options(int argc, char * const argv[])
@@ -110,6 +113,7 @@ static void process_options(int argc, char * const argv[])
{"version", no_argument, 0, 'V'},
{"input-skip", required_argument, 0, 0},
{"input-size", required_argument, 0, 0},
+ {"skip-bad-blocks-to-start", no_argument, 0, 0},
{"help", no_argument, 0, 'h'},
{"blockalign", required_argument, 0, 'b'},
{"markbad", no_argument, 0, 'm'},
@@ -139,6 +143,9 @@ static void process_options(int argc, char * const argv[])
case 2: /* --input-size */
inputsize = simple_strtoll(optarg, &error);
break;
+ case 3: /* --skip-bad-blocks-to-start */
+ skip_bad_blocks_to_start = true;
+ break;
}
break;
case 'V':
@@ -365,6 +372,25 @@ int main(int argc, char * const argv[])
goto closeall;
}
+ /* Skip bad blocks on the way to the start address if necessary */
+ if (skip_bad_blocks_to_start) {
+ long long bbs_offset = 0;
+ while (bbs_offset < mtdoffset) {
+ ret = is_virt_block_bad(&mtd, fd, bbs_offset);
+ if (ret < 0) {
+ sys_errmsg("%s: MTD get bad block failed", mtd_device);
+ goto closeall;
+ } else if (ret == 1) {
+ if (!quiet)
+ fprintf(stderr, "Bad block at %llx, %u block(s) "
+ "from %llx will be skipped\n",
+ bbs_offset, blockalign, bbs_offset);
+ mtdoffset += ebsize_aligned;
+ }
+ bbs_offset += ebsize_aligned;
+ }
+ }
+
/* Check, if length fits into device */
if ((imglen / pagelen) * mtd.min_io_size > mtd.size - mtdoffset) {
fprintf(stderr, "Image %lld bytes, NAND page %d bytes, OOB area %d"