tools/firmware-utils/src/mkfwimage.c

   1 /*
   2  * Copyright (C) 2007 Ubiquiti Networks, Inc.
   3  * Copyright (C) 2008 Lukas Kuna <ValXdater@seznam.cz>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <zlib.h>
  27 #include <sys/mman.h>
  28 #include <netinet/in.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <limits.h>
  32 #include "fw.h"
  33
  34 typedef struct fw_layout_data {
  35         char            name[PATH_MAX];
  36         u_int32_t       kern_start;
  37         u_int32_t       kern_entry;
  38         u_int32_t       firmware_max_length;
  39 } fw_layout_t;
  40
  41 fw_layout_t fw_layout_data[] = {
  42         {
  43                 .name           =       "XS2",
  44                 .kern_start     =       0xbfc30000,
  45                 .kern_entry     =       0x80041000,
  46                 .firmware_max_length=   0x00390000,
  47         },
  48         {
  49                 .name           =       "XS5",
  50                 .kern_start     =       0xbe030000,
  51                 .kern_entry     =       0x80041000,
  52                 .firmware_max_length=   0x00390000,
  53         },
  54         {
  55                 .name           =       "RS",
  56                 .kern_start     =       0xbf030000,
  57                 .kern_entry     =       0x80060000,
  58                 .firmware_max_length=   0x00B00000,
  59         },
  60         {
  61                 .name           =       "RSPRO",
  62                 .kern_start     =       0xbf030000,
  63                 .kern_entry     =       0x80060000,
  64                 .firmware_max_length=   0x00B00000,
  65         },
  66         {
  67                 .name           =       "LS-SR71",
  68                 .kern_start     =       0xbf030000,
  69                 .kern_entry     =       0x80060000,
  70                 .firmware_max_length=   0x00640000,
  71         },
  72         {
  73                 .name           =       "XS2-8",
  74                 .kern_start     =       0xa8030000,
  75                 .kern_entry     =       0x80041000,
  76                 .firmware_max_length=   0x006C0000,
  77         },
  78         {
  79                 .name           =       "XM",
  80                 .kern_start     =       0x9f050000,
  81                 .kern_entry     =       0x80002000,
  82                 .firmware_max_length=   0x006A0000,
  83         },
  84         {       .name           =       "",
  85         },
  86 };
  87
  88 typedef struct part_data {
  89         char    partition_name[64];
  90         int     partition_index;
  91         u_int32_t       partition_baseaddr;
  92         u_int32_t       partition_startaddr;
  93         u_int32_t       partition_memaddr;
  94         u_int32_t       partition_entryaddr;
  95         u_int32_t  partition_length;
  96
  97         char    filename[PATH_MAX];
  98         struct stat stats;
  99 } part_data_t;
 100
 101 #define MAX_SECTIONS    8
 102 #define DEFAULT_OUTPUT_FILE     "firmware-image.bin"
 103 #define DEFAULT_VERSION         "UNKNOWN"
 104
 105 #define OPTIONS "B:hv:m:o:r:k:"
 106
 107 static int debug = 0;
 108
 109 typedef struct image_info {
 110         char magic[16];
 111         char version[256];
 112         char outputfile[PATH_MAX];
 113         u_int32_t       part_count;
 114         part_data_t parts[MAX_SECTIONS];
 115 } image_info_t;
 116
 117 static void write_header(void* mem, const char *magic, const char* version)
 118 {
 119         header_t* header = mem;
 120         memset(header, 0, sizeof(header_t));
 121
 122         memcpy(header->magic, magic, MAGIC_LENGTH);
 123         strncpy(header->version, version, sizeof(header->version));
 124         header->crc = htonl(crc32(0L, (unsigned char *)header,
 125                                 sizeof(header_t) - 2 * sizeof(u_int32_t)));
 126         header->pad = 0L;
 127 }
 128
 129
 130 static void write_signature(void* mem, u_int32_t sig_offset)
 131 {
 132         /* write signature */
 133         signature_t* sign = (signature_t*)(mem + sig_offset);
 134         memset(sign, 0, sizeof(signature_t));
 135
 136         memcpy(sign->magic, MAGIC_END, MAGIC_LENGTH);
 137         sign->crc = htonl(crc32(0L,(unsigned char *)mem, sig_offset));
 138         sign->pad = 0L;
 139 }
 140
 141 static int write_part(void* mem, part_data_t* d)
 142 {
 143         char* addr;
 144         int fd;
 145         part_t* p = mem;
 146         part_crc_t* crc = mem + sizeof(part_t) + d->stats.st_size;
 147
 148         fd = open(d->filename, O_RDONLY);
 149         if (fd < 0)
 150         {
 151                 ERROR("Failed opening file '%s'\n", d->filename);
 152                 return -1;
 153         }
 154
 155         if ((addr=(char*)mmap(0, d->stats.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED)
 156         {
 157                 ERROR("Failed mmaping memory for file '%s'\n", d->filename);
 158                 close(fd);
 159                 return -2;
 160         }
 161
 162         memcpy(mem + sizeof(part_t), addr, d->stats.st_size);
 163         munmap(addr, d->stats.st_size);
 164
 165         memset(p->name, 0, sizeof(p->name));
 166         strncpy(p->magic, MAGIC_PART, MAGIC_LENGTH);
 167         strncpy(p->name, d->partition_name, sizeof(p->name));
 168         p->index = htonl(d->partition_index);
 169         p->data_size = htonl(d->stats.st_size);
 170         p->part_size = htonl(d->partition_length);
 171         p->baseaddr = htonl(d->partition_baseaddr);
 172         p->memaddr = htonl(d->partition_memaddr);
 173         p->entryaddr = htonl(d->partition_entryaddr);
 174
 175         crc->crc = htonl(crc32(0L, mem, d->stats.st_size + sizeof(part_t)));
 176         crc->pad = 0L;
 177
 178         return 0;
 179 }
 180
 181 static void usage(const char* progname)
 182 {
 183         INFO("Version %s\n"
 184              "Usage: %s [options]\n"
 185              "\t-v <version string>\t - firmware version information, default: %s\n"
 186              "\t-o <output file>\t - firmware output file, default: %s\n"
 187              "\t-m <magic>\t - firmware magic, default: %s\n"
 188              "\t-k <kernel file>\t\t - kernel file\n"
 189              "\t-r <rootfs file>\t\t - rootfs file\n"
 190              "\t-B <board name>\t\t - choose firmware layout for specified board (XS2, XS5, RS, XM)\n"
 191              "\t-h\t\t\t - this help\n", VERSION,
 192              progname, DEFAULT_VERSION, DEFAULT_OUTPUT_FILE, MAGIC_HEADER);
 193 }
 194
 195 static void print_image_info(const image_info_t* im)
 196 {
 197         int i = 0;
 198         INFO("Firmware version: '%s'\n"
 199              "Output file: '%s'\n"
 200              "Part count: %u\n",
 201              im->version, im->outputfile,
 202              im->part_count);
 203
 204         for (i = 0; i < im->part_count; ++i)
 205         {
 206                 const part_data_t* d = &im->parts[i];
 207                 INFO(" %10s: %8ld bytes (free: %8ld)\n",
 208                      d->partition_name,
 209                      d->stats.st_size,
 210                      d->partition_length - d->stats.st_size);
 211         }
 212 }
 213
 214
 215
 216 static u_int32_t filelength(const char* file)
 217 {
 218         FILE *p;
 219         int ret = -1;
 220
 221         if ( (p = fopen(file, "rb") ) == NULL) return (-1);
 222
 223         fseek(p, 0, SEEK_END);
 224         ret = ftell(p);
 225
 226         fclose (p);
 227
 228         return (ret);
 229 }
 230
 231 static int create_image_layout(const char* kernelfile, const char* rootfsfile, char* board_name, image_info_t* im)
 232 {
 233         part_data_t* kernel = &im->parts[0];
 234         part_data_t* rootfs = &im->parts[1];
 235
 236         fw_layout_t* p;
 237
 238         p = &fw_layout_data[0];
 239         while ((strlen(p->name) != 0) && (strncmp(p->name, board_name, sizeof(board_name)) != 0))
 240                 p++;
 241         if (p->name == NULL) {
 242                 printf("BUG! Unable to find default fw layout!\n");
 243                 exit(-1);
 244         }
 245
 246         printf("board = %s\n", p->name);
 247         strcpy(kernel->partition_name, "kernel");
 248         kernel->partition_index = 1;
 249         kernel->partition_baseaddr = p->kern_start;
 250         if ( (kernel->partition_length = filelength(kernelfile)) < 0) return (-1);
 251         kernel->partition_memaddr = p->kern_entry;
 252         kernel->partition_entryaddr = p->kern_entry;
 253         strncpy(kernel->filename, kernelfile, sizeof(kernel->filename));
 254
 255         if (filelength(rootfsfile) + kernel->partition_length > p->firmware_max_length)
 256                 return (-2);
 257
 258         strcpy(rootfs->partition_name, "rootfs");
 259         rootfs->partition_index = 2;
 260         rootfs->partition_baseaddr = kernel->partition_baseaddr + kernel->partition_length;
 261         rootfs->partition_length = p->firmware_max_length - kernel->partition_length;
 262         rootfs->partition_memaddr = 0x00000000;
 263         rootfs->partition_entryaddr = 0x00000000;
 264         strncpy(rootfs->filename, rootfsfile, sizeof(rootfs->filename));
 265
 266 printf("kernel: %d 0x%08x\n", kernel->partition_length, kernel->partition_baseaddr);
 267 printf("root: %d 0x%08x\n", rootfs->partition_length, rootfs->partition_baseaddr);
 268         im->part_count = 2;
 269
 270         return 0;
 271 }
 272
 273 /**
 274  * Checks the availability and validity of all image components.
 275  * Fills in stats member of the part_data structure.
 276  */
 277 static int validate_image_layout(image_info_t* im)
 278 {
 279         int i;
 280
 281         if (im->part_count == 0 || im->part_count > MAX_SECTIONS)
 282         {
 283                 ERROR("Invalid part count '%d'\n", im->part_count);
 284                 return -1;
 285         }
 286
 287         for (i = 0; i < im->part_count; ++i)
 288         {
 289                 part_data_t* d = &im->parts[i];
 290                 int len = strlen(d->partition_name);
 291                 if (len == 0 || len > 16)
 292                 {
 293                         ERROR("Invalid partition name '%s' of the part %d\n",
 294                                         d->partition_name, i);
 295                         return -1;
 296                 }
 297                 if (stat(d->filename, &d->stats) < 0)
 298                 {
 299                         ERROR("Couldn't stat file '%s' from part '%s'\n",
 300                                         d->filename, d->partition_name);
 301                         return -2;
 302                 }
 303                 if (d->stats.st_size == 0)
 304                 {
 305                         ERROR("File '%s' from part '%s' is empty!\n",
 306                                         d->filename, d->partition_name);
 307                         return -3;
 308                 }
 309                 if (d->stats.st_size > d->partition_length) {
 310                         ERROR("File '%s' too big (%d) - max size: 0x%08X (exceeds %lu bytes)\n",
 311                                         d->filename, i, d->partition_length,
 312                                         d->stats.st_size - d->partition_length);
 313                         return -4;
 314                 }
 315         }
 316
 317         return 0;
 318 }
 319
 320 static int build_image(image_info_t* im)
 321 {
 322         char* mem;
 323         char* ptr;
 324         u_int32_t mem_size;
 325         FILE* f;
 326         int i;
 327
 328         // build in-memory buffer
 329         mem_size = sizeof(header_t) + sizeof(signature_t);
 330         for (i = 0; i < im->part_count; ++i)
 331         {
 332                 part_data_t* d = &im->parts[i];
 333                 mem_size += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
 334         }
 335
 336         mem = (char*)calloc(mem_size, 1);
 337         if (mem == NULL)
 338         {
 339                 ERROR("Cannot allocate memory chunk of size '%u'\n", mem_size);
 340                 return -1;
 341         }
 342
 343         // write header
 344         write_header(mem, im->magic, im->version);
 345         ptr = mem + sizeof(header_t);
 346         // write all parts
 347         for (i = 0; i < im->part_count; ++i)
 348         {
 349                 part_data_t* d = &im->parts[i];
 350                 int rc;
 351                 if ((rc = write_part(ptr, d)) != 0)
 352                 {
 353                         ERROR("ERROR: failed writing part %u '%s'\n", i, d->partition_name);
 354                 }
 355                 ptr += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
 356         }
 357         // write signature
 358         write_signature(mem, mem_size - sizeof(signature_t));
 359
 360         // write in-memory buffer into file
 361         if ((f = fopen(im->outputfile, "w")) == NULL)
 362         {
 363                 ERROR("Can not create output file: '%s'\n", im->outputfile);
 364                 return -10;
 365         }
 366
 367         if (fwrite(mem, mem_size, 1, f) != 1)
 368         {
 369                 ERROR("Could not write %d bytes into file: '%s'\n",
 370                                 mem_size, im->outputfile);
 371                 return -11;
 372         }
 373
 374         free(mem);
 375         fclose(f);
 376         return 0;
 377 }
 378
 379
 380 int main(int argc, char* argv[])
 381 {
 382         char kernelfile[PATH_MAX];
 383         char rootfsfile[PATH_MAX];
 384         char board_name[PATH_MAX];
 385         int o, rc;
 386         image_info_t im;
 387
 388         memset(&im, 0, sizeof(im));
 389         memset(kernelfile, 0, sizeof(kernelfile));
 390         memset(rootfsfile, 0, sizeof(rootfsfile));
 391         memset(board_name, 0, sizeof(board_name));
 392
 393         strcpy(im.outputfile, DEFAULT_OUTPUT_FILE);
 394         strcpy(im.version, DEFAULT_VERSION);
 395         strncpy(im.magic, MAGIC_HEADER, sizeof(im.magic));
 396
 397         while ((o = getopt(argc, argv, OPTIONS)) != -1)
 398         {
 399                 switch (o) {
 400                 case 'v':
 401                         if (optarg)
 402                                 strncpy(im.version, optarg, sizeof(im.version));
 403                         break;
 404                 case 'o':
 405                         if (optarg)
 406                                 strncpy(im.outputfile, optarg, sizeof(im.outputfile));
 407                         break;
 408                 case 'm':
 409                         if (optarg)
 410                                 strncpy(im.magic, optarg, sizeof(im.magic));
 411                         break;
 412                 case 'h':
 413                         usage(argv[0]);
 414                         return -1;
 415                 case 'k':
 416                         if (optarg)
 417                                 strncpy(kernelfile, optarg, sizeof(kernelfile));
 418                         break;
 419                 case 'r':
 420                         if (optarg)
 421                                 strncpy(rootfsfile, optarg, sizeof(rootfsfile));
 422                         break;
 423                 case 'B':
 424                         if (optarg)
 425                                 strncpy(board_name, optarg, sizeof(board_name));
 426                         break;
 427                 }
 428         }
 429         if (strlen(board_name) == 0)
 430                 strcpy(board_name, "XS2"); /* default to XS2 */
 431
 432         if (strlen(kernelfile) == 0)
 433         {
 434                 ERROR("Kernel file is not specified, cannot continue\n");
 435                 usage(argv[0]);
 436                 return -2;
 437         }
 438
 439         if (strlen(rootfsfile) == 0)
 440         {
 441                 ERROR("Root FS file is not specified, cannot continue\n");
 442                 usage(argv[0]);
 443                 return -2;
 444         }
 445
 446         if ((rc = create_image_layout(kernelfile, rootfsfile, board_name, &im)) != 0)
 447         {
 448                 ERROR("Failed creating firmware layout description - error code: %d\n", rc);
 449                 return -3;
 450         }
 451
 452         if ((rc = validate_image_layout(&im)) != 0)
 453         {
 454                 ERROR("Failed validating firmware layout - error code: %d\n", rc);
 455                 return -4;
 456         }
 457
 458         print_image_info(&im);
 459
 460         if ((rc = build_image(&im)) != 0)
 461         {
 462                 ERROR("Failed building image file '%s' - error code: %d\n", im.outputfile, rc);
 463                 return -5;
 464         }
 465
 466         return 0;
 467 }