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mkudfu.c

/*
 * USB DFU file trailer tool
 * (C) Copyright by OpenMoko, Inc.
 * Author: Harald Welte <laforge@openmoko.org>
 *
 * based on mkimage.c, copyright information as follows:
 *
 * (C) Copyright 2000-2004
 * DENX Software Engineering
 * Wolfgang Denk, wd@denx.de
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __WIN32__
#include <netinet/in.h>       /* for host / network byte order conversions    */
#endif
#include <sys/mman.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>

#if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
#include <inttypes.h>
#endif

#ifdef __WIN32__
typedef unsigned int __u32;

#define SWAP_LONG(x) \
      ((__u32)( \
            (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
            (((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
            (((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
            (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
typedef           unsigned char     uint8_t;
typedef           unsigned short    uint16_t;
typedef           unsigned int      uint32_t;

#define     ntohl(a)    SWAP_LONG(a)
#define     htonl(a)    SWAP_LONG(a)
#endif      /* __WIN32__ */

#ifndef     O_BINARY          /* should be define'd on __WIN32__ */
#define O_BINARY  0
#endif

#include "usb_dfu_trailer.h"

extern int errno;

#ifndef MAP_FAILED
#define MAP_FAILED (-1)
#endif

static char *cmdname;

static char *datafile;
static char *imagefile;


static void usage()
{
      fprintf (stderr, "%s - create / display u-boot DFU trailer\n", cmdname);
      fprintf (stderr, "Usage: %s -l image\n"
                   "          -l ==> list image header information\n"
                   "       %s -v VID -p PID -r REV -d data_file image\n",
            cmdname, cmdname);
      fprintf (stderr, "          -v ==> set vendor ID to 'VID'\n"
                   "          -p ==> set product ID system to 'PID'\n"
                   "          -r ==> set hardware revision to 'REV'\n"
                   "          -d ==> use 'data_file' as input file\n"
            );
      exit (EXIT_FAILURE);
}

static void print_trailer(struct uboot_dfu_trailer *trailer)
{
      printf("===> DFU Trailer information:\n");
      printf("Trailer Vers.:  %d\n", trailer->version);
      printf("Trailer Length: %d\n", trailer->length);
      printf("VendorID: 0x%04x\n", trailer->vendor);
      printf("ProductID:      0x%04x\n", trailer->product);
      printf("HW Revision:    0x%04x\n", trailer->revision);
}

static void copy_file (int ifd, const char *datafile, int pad)
{
      int dfd;
      struct stat sbuf;
      unsigned char *ptr;
      int tail;
      int zero = 0;
      int offset = 0;
      int size;

      if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
            fprintf (stderr, "%s: Can't open %s: %s\n",
                  cmdname, datafile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      if (fstat(dfd, &sbuf) < 0) {
            fprintf (stderr, "%s: Can't stat %s: %s\n",
                  cmdname, datafile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      ptr = (unsigned char *)mmap(0, sbuf.st_size,
                            PROT_READ, MAP_SHARED, dfd, 0);
      if (ptr == (unsigned char *)MAP_FAILED) {
            fprintf (stderr, "%s: Can't read %s: %s\n",
                  cmdname, datafile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      size = sbuf.st_size - offset;
      if (write(ifd, ptr + offset, size) != size) {
            fprintf (stderr, "%s: Write error on %s: %s\n",
                  cmdname, imagefile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      if (pad && ((tail = size % 4) != 0)) {

            if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
                  fprintf (stderr, "%s: Write error on %s: %s\n",
                        cmdname, imagefile, strerror(errno));
                  exit (EXIT_FAILURE);
            }
      }

      (void) munmap((void *)ptr, sbuf.st_size);
      (void) close (dfd);
}


int main(int argc, char **argv)
{
      int ifd;
      int lflag = 0;
      struct stat sbuf;
      u_int16_t opt_vendor, opt_product, opt_revision;
      struct uboot_dfu_trailer _hdr, _mirror, *hdr = &_hdr;

      opt_vendor = opt_product = opt_revision = 0;

      cmdname = *argv;

      while (--argc > 0 && **++argv == '-') {
            while (*++*argv) {
                  switch (**argv) {
                  case 'l':
                        lflag = 1;
                        break;
                  case 'v':
                        if (--argc <= 0)
                              usage ();
                        opt_vendor = strtoul(*++argv, NULL, 16);
                        goto NXTARG;
                  case 'p':
                        if (--argc <= 0)
                              usage ();
                        opt_product = strtoul(*++argv, NULL, 16);
                        goto NXTARG;
                  case 'r':
                        if (--argc <= 0)
                              usage ();
                        opt_revision = strtoul(*++argv, NULL, 16);
                        goto NXTARG;
                  case 'd':
                        if (--argc <= 0)
                              usage ();
                        datafile = *++argv;
                        goto NXTARG;
                  case 'h':
                        usage();
                        break;
                  default:
                        usage();
                  }
            }
NXTARG:           ;
      }

      if (argc != 1)
            usage();

      imagefile = *argv;

      if (lflag)
            ifd = open(imagefile, O_RDONLY|O_BINARY);
      else
            ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);

      if (ifd < 0) {
            fprintf (stderr, "%s: Can't open %s: %s\n",
                  cmdname, imagefile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      if (lflag) {
            unsigned char *ptr;
            /* list header information of existing image */
            if (fstat(ifd, &sbuf) < 0) {
                  fprintf (stderr, "%s: Can't stat %s: %s\n",
                        cmdname, imagefile, strerror(errno));
                  exit (EXIT_FAILURE);
            }

            if ((unsigned)sbuf.st_size < sizeof(struct uboot_dfu_trailer)) {
                  fprintf (stderr,
                        "%s: Bad size: \"%s\" is no valid image\n",
                        cmdname, imagefile);
                  exit (EXIT_FAILURE);
            }

            ptr = (unsigned char *)mmap(0, sbuf.st_size,
                                  PROT_READ, MAP_SHARED, ifd, 0);
            if ((caddr_t)ptr == (caddr_t)-1) {
                  fprintf (stderr, "%s: Can't read %s: %s\n",
                        cmdname, imagefile, strerror(errno));
                  exit (EXIT_FAILURE);
            }

            dfu_trailer_mirror(hdr, ptr+sbuf.st_size);

            if (hdr->magic != UBOOT_DFU_TRAILER_MAGIC) {
                  fprintf (stderr,
                        "%s: Bad Magic Number: \"%s\" is no valid image\n",
                        cmdname, imagefile);
                  exit (EXIT_FAILURE);
            }

            /* for multi-file images we need the data part, too */
            print_trailer(hdr);

            (void) munmap((void *)ptr, sbuf.st_size);
            (void) close (ifd);

            exit (EXIT_SUCCESS);
      }

      /* if we're not listing: */

      copy_file (ifd, datafile, 0);

      memset (hdr, 0, sizeof(struct uboot_dfu_trailer));

      /* Build new header */
      hdr->version      = UBOOT_DFU_TRAILER_V1;
      hdr->magic  = UBOOT_DFU_TRAILER_MAGIC;
      hdr->length = sizeof(struct uboot_dfu_trailer);
      hdr->vendor = opt_vendor;
      hdr->product      = opt_product;
      hdr->revision     = opt_revision;

      print_trailer(hdr);
      dfu_trailer_mirror(&_mirror, (unsigned char *)hdr+sizeof(*hdr));

      if (write(ifd, &_mirror, sizeof(struct uboot_dfu_trailer))
                              != sizeof(struct uboot_dfu_trailer)) {
            fprintf (stderr, "%s: Write error on %s: %s\n",
                  cmdname, imagefile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      /* We're a bit of paranoid */
#if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
      (void) fdatasync (ifd);
#else
      (void) fsync (ifd);
#endif

      if (fstat(ifd, &sbuf) < 0) {
            fprintf (stderr, "%s: Can't stat %s: %s\n",
                  cmdname, imagefile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      /* We're a bit of paranoid */
#if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
      (void) fdatasync (ifd);
#else
      (void) fsync (ifd);
#endif

      if (close(ifd)) {
            fprintf (stderr, "%s: Write error on %s: %s\n",
                  cmdname, imagefile, strerror(errno));
            exit (EXIT_FAILURE);
      }

      exit (EXIT_SUCCESS);
}

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