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-rw-r--r--tests/mtd-tests/nandbiterrs.c43
1 files changed, 35 insertions, 8 deletions
diff --git a/tests/mtd-tests/nandbiterrs.c b/tests/mtd-tests/nandbiterrs.c
index de9d0dd..200fe1c 100644
--- a/tests/mtd-tests/nandbiterrs.c
+++ b/tests/mtd-tests/nandbiterrs.c
@@ -62,6 +62,7 @@
#define KEEP_CONTENTS 0x01
#define MODE_INCREMENTAL 0x02
#define MODE_OVERWRITE 0x04
+#define PAGE_ERASED 0x08
static int peb = -1, page = -1, max_overwrite = -1, seed = -1;
static const char *mtddev;
@@ -77,6 +78,7 @@ static const struct option options[] = {
{ "peb", required_argument, NULL, 'b' },
{ "page", required_argument, NULL, 'p' },
{ "seed", required_argument, NULL, 's' },
+ { "erased", no_argument, NULL, 'e' },
{ "writes", required_argument, NULL, 'w' },
{ "incremental", no_argument, NULL, 'i' },
{ "overwrite", no_argument, NULL, 'o' },
@@ -92,7 +94,8 @@ static void usage(int status)
" -k, --keep Restore existing contents after test\n"
" -b, --peb <num> Use this physical erase block\n"
" -p, --page <num> Use this page within the erase block\n"
- " -s, --seed <num> Specify seed for PRNG\n\n"
+ " -s, --seed <num> Specify seed for PRNG\n"
+ " -e, --erased Test erased pages instead of written pages\n\n"
"Options controling test mode:\n"
" -i, --incremental Manually insert bit errors until ECC fails\n"
" -o, --overwrite Rewrite page until bits flip and ECC fails\n\n"
@@ -121,7 +124,7 @@ static void process_options(int argc, char **argv)
int c;
while (1) {
- c = getopt_long(argc, argv, "hkb:p:s:iow:", options, NULL);
+ c = getopt_long(argc, argv, "hkb:p:s:eiow:", options, NULL);
if (c == -1)
break;
@@ -169,6 +172,9 @@ static void process_options(int argc, char **argv)
if (page < 0)
goto failarg;
break;
+ case 'e':
+ flags |= PAGE_ERASED;
+ break;
case 'h':
usage(EXIT_SUCCESS);
default:
@@ -224,17 +230,39 @@ static unsigned char hash(unsigned int offset)
return c;
}
+static void init_buffer(void)
+{
+ unsigned int i;
+
+ if (flags & PAGE_ERASED) {
+ memset(wbuffer, 0xff, pagesize);
+ } else {
+ for (i = 0; i < pagesize; ++i)
+ wbuffer[i] = hash(i+seed);
+ }
+}
+
static int write_page(void)
{
+ int raw = flags & PAGE_ERASED;
int err;
+ if (raw && ioctl(fd, MTDFILEMODE, MTD_FILE_MODE_RAW) != 0)
+ goto fail_mode;
+
err = mtd_write(mtd_desc, &mtd, fd, peb, page*pagesize,
wbuffer, pagesize, NULL, 0, 0);
if (err)
fprintf(stderr, "Failed to write page %d in block %d\n", peb, page);
+ if (raw && ioctl(fd, MTDFILEMODE, MTD_FILE_MODE_NORMAL) != 0)
+ goto fail_mode;
+
return err;
+fail_mode:
+ perror("MTDFILEMODE");
+ return -1;
}
static int rewrite_page(void)
@@ -285,10 +313,11 @@ failstats:
static int verify_page(void)
{
+ int erased = flags & PAGE_ERASED;
unsigned int i, errs = 0;
for (i = 0; i < pagesize; ++i) {
- if (rbuffer[i] != hash(i+seed))
+ if (rbuffer[i] != (erased ? 0xff : hash(i+seed)))
++errs;
}
@@ -321,13 +350,12 @@ static int insert_biterror(void)
* errors into the page, while verifying each step. */
static int incremental_errors_test(void)
{
- unsigned int i, errs_per_subpage = 0;
+ unsigned int errs_per_subpage = 0;
int count = 0;
puts("incremental biterrors test");
- for (i = 0; i < pagesize; ++i)
- wbuffer[i] = hash(i+seed);
+ init_buffer();
if (write_page() != 0)
return -1;
@@ -372,8 +400,7 @@ static int overwrite_test(void)
puts("overwrite biterrors test");
- for (i = 0; i < pagesize; ++i)
- wbuffer[i] = hash(i+seed);
+ init_buffer();
if (write_page() != 0)
return -1;