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#define _GNU_SOURCE
#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"
/*
* Main program
*/
int main(int argc, char **argv)
{
int fd;
int block, i;
unsigned char *wbuf, *rbuf;
struct mtd_info_user meminfo;
struct mtd_ecc_stats oldstats, newstats;
int seed;
int pass;
int nr_passes = 1;
if (argc == 4) {
seed = atol(argv[3]);
argc = 3;
}
if (argc == 3) {
nr_passes = atol(argv[2]);
argc = 2;
}
if (argc != 2) {
fprintf(stderr, "usage: %s <device> [<passes>] [<random seed>]\n",
(strrchr(argv[0],',')?:argv[0]-1)+1);
exit(1);
}
fd = open(argv[1], O_RDWR);
if (fd < 0) {
perror("open");
exit(1);
}
if (ioctl(fd, MEMGETINFO, &meminfo)) {
perror("MEMGETINFO");
close(fd);
exit(1);
}
wbuf = malloc(meminfo.erasesize * 2);
if (!wbuf) {
fprintf(stderr, "Could not allocate %d bytes for buffer\n",
meminfo.erasesize * 2);
exit(1);
}
rbuf = wbuf + 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);
for (pass = 0; pass < nr_passes; pass++) {
for (block = 0; block < meminfo.size / meminfo.erasesize ; block++) {
loff_t ofs = block * meminfo.erasesize;
struct erase_info_user er;
ssize_t len;
seed = rand();
srand(seed);
if (ioctl(fd, MEMGETBADBLOCK, &ofs)) {
printf("\rBad block at 0x%08x\n", (unsigned)ofs);
continue;
}
printf("\r%08x: erasing... ", (unsigned)ofs);
fflush(stdout);
er.start = ofs;
er.length = meminfo.erasesize;
if (ioctl(fd, MEMERASE, &er)) {
perror("MEMERASE");
exit(1);
}
printf("\r%08x: writing...", (unsigned)ofs);
fflush(stdout);
for (i=0; i<meminfo.erasesize; i++)
wbuf[i] = rand();
len = pwrite(fd, wbuf, meminfo.erasesize, ofs);
if (len < 0) {
printf("\n");
perror("write");
exit(1);
}
if (len < meminfo.erasesize) {
printf("\n");
fprintf(stderr, "Short write (%d bytes)\n", len);
exit(1);
}
printf("\r%08x: reading...", (unsigned)ofs);
fflush(stdout);
len = pread(fd, rbuf, meminfo.erasesize, ofs);
if (len < meminfo.erasesize) {
printf("\n");
if (len)
fprintf(stderr, "Short read (%d 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("\nECC corrected at %08x\n", (unsigned) ofs);
newstats.corrected = oldstats.corrected;
}
if (newstats.failed > oldstats.failed) {
printf("\nECC failed at %08x\n", (unsigned) ofs);
newstats.corrected = oldstats.corrected;
}
if (len < meminfo.erasesize)
exit(1);
printf("\r%08x: checking...", (unsigned)ofs);
fflush(stdout);
if (memcmp(wbuf, rbuf, meminfo.erasesize)) {
printf("\n");
fprintf(stderr, "compare failed. seed %d\n", seed);
for (i=0; i<meminfo.erasesize; i++) {
if (wbuf[i] != rbuf[i])
printf("Byte 0x%x is %02x should be %02x\n",
i, rbuf[i], wbuf[i]);
}
exit(1);
}
}
printf("\nFinished pass %d successfully\n", pass+1);
}
/* Return happy */
return 0;
}
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