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-rw-r--r--nand-utils/nandtest.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/nand-utils/nandtest.c b/nand-utils/nandtest.c
new file mode 100644
index 0000000..2ef7cc8
--- /dev/null
+++ b/nand-utils/nandtest.c
@@ -0,0 +1,317 @@
+#define PROGRAM_NAME "nandtest"
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <getopt.h>
+
+#include <asm/types.h>
+#include "mtd/mtd-user.h"
+#include "common.h"
+
+void usage(int status)
+{
+ fprintf(status ? stderr : stdout,
+ "usage: %s [OPTIONS] <device>\n\n"
+ " -h, --help Display this help output\n"
+ " -m, --markbad Mark blocks bad if they appear so\n"
+ " -s, --seed Supply random seed\n"
+ " -p, --passes Number of passes\n"
+ " -r <n>, --reads=<n> Read & check <n> times per pass\n"
+ " -o, --offset Start offset on flash\n"
+ " -l, --length Length of flash to test\n"
+ " -k, --keep Restore existing contents after test\n",
+ PROGRAM_NAME);
+ exit(status);
+}
+
+struct mtd_info_user meminfo;
+struct mtd_ecc_stats oldstats, newstats;
+int fd;
+int markbad=0;
+int seed;
+
+int read_and_compare(loff_t ofs, unsigned char *data, unsigned char *rbuf)
+{
+ ssize_t len;
+ int i;
+
+ len = pread(fd, rbuf, meminfo.erasesize, ofs);
+ if (len < meminfo.erasesize) {
+ printf("\n");
+ if (len)
+ fprintf(stderr, "Short read (%zd bytes)\n", len);
+ else
+ perror("read");
+ exit(1);
+ }
+
+ if (ioctl(fd, ECCGETSTATS, &newstats)) {
+ printf("\n");
+ perror("ECCGETSTATS");
+ close(fd);
+ exit(1);
+ }
+
+ if (newstats.corrected > oldstats.corrected) {
+ printf("\n %d bit(s) ECC corrected at %08x\n",
+ newstats.corrected - oldstats.corrected,
+ (unsigned) ofs);
+ oldstats.corrected = newstats.corrected;
+ }
+ if (newstats.failed > oldstats.failed) {
+ printf("\nECC failed at %08x\n", (unsigned) ofs);
+ oldstats.failed = newstats.failed;
+ }
+
+ printf("\r%08x: checking...", (unsigned)ofs);
+ fflush(stdout);
+
+ if (memcmp(data, rbuf, meminfo.erasesize)) {
+ printf("\n");
+ fprintf(stderr, "compare failed. seed %d\n", seed);
+ for (i=0; i<meminfo.erasesize; i++) {
+ if (data[i] != rbuf[i])
+ printf("Byte 0x%x is %02x should be %02x\n",
+ i, rbuf[i], data[i]);
+ }
+ return 1;
+ }
+ return 0;
+}
+
+int erase_and_write(loff_t ofs, unsigned char *data, unsigned char *rbuf, int nr_reads)
+{
+ struct erase_info_user er;
+ ssize_t len;
+ int i, read_errs = 0;
+
+ printf("\r%08x: erasing... ", (unsigned)ofs);
+ fflush(stdout);
+
+ er.start = ofs;
+ er.length = meminfo.erasesize;
+
+ if (ioctl(fd, MEMERASE, &er)) {
+ perror("MEMERASE");
+ if (markbad) {
+ printf("Mark block bad at %08lx\n", (long)ofs);
+ ioctl(fd, MEMSETBADBLOCK, &ofs);
+ }
+ return 1;
+ }
+
+ printf("\r%08x: writing...", (unsigned)ofs);
+ fflush(stdout);
+
+ len = pwrite(fd, data, meminfo.erasesize, ofs);
+ if (len < 0) {
+ printf("\n");
+ perror("write");
+ if (markbad) {
+ printf("Mark block bad at %08lx\n", (long)ofs);
+ ioctl(fd, MEMSETBADBLOCK, &ofs);
+ }
+ return 1;
+ }
+ if (len < meminfo.erasesize) {
+ printf("\n");
+ fprintf(stderr, "Short write (%zd bytes)\n", len);
+ exit(1);
+ }
+
+ for (i=1; i<=nr_reads; i++) {
+ printf("\r%08x: reading (%d of %d)...", (unsigned)ofs, i, nr_reads);
+ fflush(stdout);
+ if (read_and_compare(ofs, data, rbuf))
+ read_errs++;
+ }
+ if (read_errs) {
+ fprintf(stderr, "read/check %d of %d failed. seed %d\n", read_errs, nr_reads, seed);
+ return 1;
+ }
+ return 0;
+}
+
+
+/*
+ * Main program
+ */
+int main(int argc, char **argv)
+{
+ int i;
+ unsigned char *wbuf, *rbuf, *kbuf;
+ int pass;
+ int nr_passes = 1;
+ int nr_reads = 4;
+ int keep_contents = 0;
+ uint32_t offset = 0;
+ uint32_t length = -1;
+ int error = 0;
+
+ seed = time(NULL);
+
+ for (;;) {
+ static const char short_options[] = "hkl:mo:p:r:s:";
+ static const struct option long_options[] = {
+ { "help", no_argument, 0, 'h' },
+ { "markbad", no_argument, 0, 'm' },
+ { "seed", required_argument, 0, 's' },
+ { "passes", required_argument, 0, 'p' },
+ { "offset", required_argument, 0, 'o' },
+ { "length", required_argument, 0, 'l' },
+ { "reads", required_argument, 0, 'r' },
+ { "keep", no_argument, 0, 'k' },
+ {0, 0, 0, 0},
+ };
+ int option_index = 0;
+ int c = getopt_long(argc, argv, short_options, long_options, &option_index);
+ if (c == EOF)
+ break;
+
+ switch (c) {
+ case 'h':
+ usage(0);
+ break;
+
+ case '?':
+ usage(1);
+ break;
+
+ case 'm':
+ markbad = 1;
+ break;
+
+ case 'k':
+ keep_contents = 1;
+ break;
+
+ case 's':
+ seed = atol(optarg);
+ break;
+
+ case 'p':
+ nr_passes = atol(optarg);
+ break;
+
+ case 'r':
+ nr_reads = atol(optarg);
+ break;
+
+ case 'o':
+ offset = simple_strtoul(optarg, &error);
+ break;
+
+ case 'l':
+ length = simple_strtoul(optarg, &error);
+ break;
+
+ }
+ }
+ if (argc - optind != 1)
+ usage(1);
+ if (error)
+ errmsg_die("Try --help for more information");
+
+ fd = open(argv[optind], O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+
+ if (ioctl(fd, MEMGETINFO, &meminfo)) {
+ perror("MEMGETINFO");
+ close(fd);
+ exit(1);
+ }
+
+ if (length == -1)
+ length = meminfo.size;
+
+ if (offset % meminfo.erasesize) {
+ fprintf(stderr, "Offset %x not multiple of erase size %x\n",
+ offset, meminfo.erasesize);
+ exit(1);
+ }
+ if (length % meminfo.erasesize) {
+ fprintf(stderr, "Length %x not multiple of erase size %x\n",
+ length, meminfo.erasesize);
+ exit(1);
+ }
+ if (length + offset > meminfo.size) {
+ fprintf(stderr, "Length %x + offset %x exceeds device size %x\n",
+ length, offset, meminfo.size);
+ exit(1);
+ }
+
+ wbuf = malloc(meminfo.erasesize * 3);
+ if (!wbuf) {
+ fprintf(stderr, "Could not allocate %d bytes for buffer\n",
+ meminfo.erasesize * 2);
+ exit(1);
+ }
+ rbuf = wbuf + meminfo.erasesize;
+ kbuf = rbuf + meminfo.erasesize;
+
+ if (ioctl(fd, ECCGETSTATS, &oldstats)) {
+ perror("ECCGETSTATS");
+ close(fd);
+ exit(1);
+ }
+
+ printf("ECC corrections: %d\n", oldstats.corrected);
+ printf("ECC failures : %d\n", oldstats.failed);
+ printf("Bad blocks : %d\n", oldstats.badblocks);
+ printf("BBT blocks : %d\n", oldstats.bbtblocks);
+
+ srand(seed);
+
+ for (pass = 0; pass < nr_passes; pass++) {
+ loff_t test_ofs;
+
+ for (test_ofs = offset; test_ofs < offset+length; test_ofs += meminfo.erasesize) {
+ ssize_t len;
+
+ seed = rand();
+ srand(seed);
+
+ if (ioctl(fd, MEMGETBADBLOCK, &test_ofs)) {
+ printf("\rBad block at 0x%08x\n", (unsigned)test_ofs);
+ continue;
+ }
+
+ for (i=0; i<meminfo.erasesize; i++)
+ wbuf[i] = rand();
+
+ if (keep_contents) {
+ printf("\r%08x: reading... ", (unsigned)test_ofs);
+ fflush(stdout);
+
+ len = pread(fd, kbuf, meminfo.erasesize, test_ofs);
+ if (len < meminfo.erasesize) {
+ printf("\n");
+ if (len)
+ fprintf(stderr, "Short read (%zd bytes)\n", len);
+ else
+ perror("read");
+ exit(1);
+ }
+ }
+ if (erase_and_write(test_ofs, wbuf, rbuf, nr_reads))
+ continue;
+ if (keep_contents)
+ erase_and_write(test_ofs, kbuf, rbuf, 1);
+ }
+ printf("\nFinished pass %d successfully\n", pass+1);
+ }
+ /* Return happy */
+ return 0;
+}