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/*
* flash_otp_dump.c -- display One-Time-Programm data
*/
#define PROGRAM_NAME "flash_otp_dump"
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <mtd/mtd-user.h>
int main(int argc,char *argv[])
{
int fd, val, i, ret;
int offset = 0;
unsigned char buf[16];
if (argc < 3 || (strcmp(argv[1], "-f") && strcmp(argv[1], "-u"))) {
fprintf(stderr,"Usage: %s [ -f | -u ] <device> [<offset>]\n", PROGRAM_NAME);
return EINVAL;
}
fd = open(argv[2], O_RDONLY);
if (fd < 0) {
perror(argv[2]);
return errno;
}
val = argv[1][1] == 'f' ? MTD_OTP_FACTORY : MTD_OTP_USER;
ret = ioctl(fd, OTPSELECT, &val);
if (ret < 0) {
perror("OTPSELECT");
return errno;
}
if (argc >= 4) {
char *p;
offset = (off_t)strtoull(argv[3], &p, 0);
if (argv[3][0] == 0 || *p != 0) {
fprintf(stderr, "%s: bad offset value\n", PROGRAM_NAME);
return ERANGE;
}
}
if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
perror("lseek()");
return errno;
}
printf("OTP %s data for %s\n",
argv[1][1] == 'f' ? "factory" : "user", argv[2]);
while ((ret = read(fd, buf, sizeof(buf)))) {
if (ret < 0) {
perror("read()");
return errno;
}
printf("0x%04x:", offset);
for (i = 0; i < ret; i++)
printf(" %02x", buf[i]);
printf("\n");
offset += ret;
}
close(fd);
return 0;
}
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