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