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Diffstat (limited to 'flash_otp_write.c')
-rw-r--r--flash_otp_write.c122
1 files changed, 0 insertions, 122 deletions
diff --git a/flash_otp_write.c b/flash_otp_write.c
deleted file mode 100644
index 111318d..0000000
--- a/flash_otp_write.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * flash_otp_write.c -- write One-Time-Program data
- */
-
-#define PROGRAM_NAME "flash_otp_write"
-
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-
-#include <common.h>
-#include <mtd/mtd-user.h>
-
-ssize_t xread(int fd, void *buf, size_t count)
-{
- ssize_t ret, done = 0;
-
-retry:
- ret = read(fd, buf + done, count - done);
- if (ret < 0)
- return ret;
-
- done += ret;
-
- if (ret == 0 /* EOF */ || done == count)
- return done;
- else
- goto retry;
-}
-
-int main(int argc,char *argv[])
-{
- int fd, val, ret, size, wrote, len;
- mtd_info_t mtdInfo;
- off_t offset;
- char *p, buf[2048];
-
- if (argc != 4 || strcmp(argv[1], "-u")) {
- fprintf(stderr, "Usage: %s -u <device> <offset>\n", PROGRAM_NAME);
- fprintf(stderr, "the raw data to write should be provided on stdin\n");
- fprintf(stderr, "CAUTION! ONCE SET TO 0, OTP DATA BITS CAN'T BE ERASED!\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;
- }
-
- if (ioctl(fd, MEMGETINFO, &mtdInfo)) {
- perror("MEMGETINFO");
- return errno;
- }
-
- 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("Writing OTP user data on %s at offset 0x%"PRIxoff_t"\n", argv[2], offset);
-
- if (mtd_type_is_nand_user(&mtdInfo))
- len = mtdInfo.writesize;
- else
- len = 256;
-
- if (len > sizeof(buf)) {
- printf("huh, writesize (%d) bigger than buffer (%zu)\n",
- len, sizeof(buf));
- return ENOMEM;
- }
-
- wrote = 0;
- while ((size = xread(0, buf, len))) {
- if (size < 0) {
- perror("read()");
- return errno;
- }
- p = buf;
- while (size > 0) {
- if (mtd_type_is_nand_user(&mtdInfo)) {
- /* Fill remain buffers with 0xff */
- memset(buf + size, 0xff, mtdInfo.writesize - size);
- size = mtdInfo.writesize;
- }
- ret = write(fd, p, size);
- if (ret < 0) {
- perror("write()");
- return errno;
- }
- if (ret == 0) {
- printf("write() returned 0 after writing %d bytes\n", wrote);
- return 0;
- }
- p += ret;
- wrote += ret;
- size -= ret;
- }
- }
-
- printf("Wrote %d bytes of OTP user data\n", wrote);
- return 0;
-}