/* * 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 <mtd/mtd-user.h> int main(int argc,char *argv[]) { int fd, val, i, offset, ret; unsigned char buf[16]; if (argc != 3 || (strcmp(argv[1], "-f") && strcmp(argv[1], "-u"))) { fprintf(stderr,"Usage: %s [ -f | -u ] <device>\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; } printf("OTP %s data for %s\n", argv[1][1] == 'f' ? "factory" : "user", argv[2]); offset = 0; 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; }