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/*
* flash_otp_lock.c -- lock area of One-Time-Program data
*/
#define PROGRAM_NAME "flash_otp_lock"
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <mtd/mtd-user.h>
#include "common.h"
int main(int argc,char *argv[])
{
int fd, val, ret, offset, size;
char *p;
if (argc != 5 || strcmp(argv[1], "-u")) {
fprintf(stderr, "Usage: %s -u <device> <offset> <size>\n", PROGRAM_NAME);
fprintf(stderr, "offset and size must match on OTP region boundaries\n");
fprintf(stderr, "CAUTION! ONCE LOCKED, OTP REGIONS CAN'T BE UNLOCKED!\n");
return EINVAL;
}
fd = open(argv[2], O_WRONLY);
if (fd < 0) {
perror(argv[2]);
return errno;
}
val = MTD_OTP_USER;
ret = ioctl(fd, OTPSELECT, &val);
if (ret < 0) {
perror("OTPSELECT");
return errno;
}
offset = strtoul(argv[3], &p, 0);
if (argv[3][0] == 0 || *p != 0) {
fprintf(stderr, "%s: bad offset value\n", PROGRAM_NAME);
return ERANGE;
}
size = strtoul(argv[4], &p, 0);
if (argv[4][0] == 0 || *p != 0) {
fprintf(stderr, "%s: bad size value\n", PROGRAM_NAME);
return ERANGE;
}
printf("About to lock OTP user data on %s from 0x%x to 0x%x\n",
argv[2], offset, offset + size);
if (prompt("Are you sure?", false)) {
struct otp_info info;
info.start = offset;
info.length = size;
ret = ioctl(fd, OTPLOCK, &info);
if (ret < 0) {
perror("OTPLOCK");
return errno;
}
printf("Done.\n");
} else {
printf("Aborted\n");
}
return 0;
}
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