tools/mxsboot.c

   1 /*
   2  * Freescale i.MX28 image generator
   3  *
   4  * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
   5  * on behalf of DENX Software Engineering GmbH
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <fcntl.h>
  11 #include <sys/stat.h>
  12 #include <sys/types.h>
  13 #include <unistd.h>
  14
  15 #include "compiler.h"
  16
  17 /*
  18  * Default BCB layout.
  19  *
  20  * TWEAK this if you have blown any OCOTP fuses.
  21  */
  22 #define STRIDE_PAGES            64
  23 #define STRIDE_COUNT            4
  24
  25 /*
  26  * Layout for 256Mb big NAND with 2048b page size, 64b OOB size and
  27  * 128kb erase size.
  28  *
  29  * TWEAK this if you have different kind of NAND chip.
  30  */
  31 static uint32_t nand_writesize = 2048;
  32 static uint32_t nand_oobsize = 64;
  33 static uint32_t nand_erasesize = 128 * 1024;
  34
  35 /*
  36  * Sector on which the SigmaTel boot partition (0x53) starts.
  37  */
  38 static uint32_t sd_sector = 2048;
  39
  40 /*
  41  * Each of the U-Boot bootstreams is at maximum 1MB big.
  42  *
  43  * TWEAK this if, for some wild reason, you need to boot bigger image.
  44  */
  45 #define MAX_BOOTSTREAM_SIZE     (1 * 1024 * 1024)
  46
  47 /* i.MX28 NAND controller-specific constants. DO NOT TWEAK! */
  48 #define MXS_NAND_DMA_DESCRIPTOR_COUNT           4
  49 #define MXS_NAND_CHUNK_DATA_CHUNK_SIZE          512
  50 #define MXS_NAND_METADATA_SIZE                  10
  51 #define MXS_NAND_BITS_PER_ECC_LEVEL             13
  52 #define MXS_NAND_COMMAND_BUFFER_SIZE            32
  53
  54 struct mx28_nand_fcb {
  55         uint32_t                checksum;
  56         uint32_t                fingerprint;
  57         uint32_t                version;
  58         struct {
  59                 uint8_t                 data_setup;
  60                 uint8_t                 data_hold;
  61                 uint8_t                 address_setup;
  62                 uint8_t                 dsample_time;
  63                 uint8_t                 nand_timing_state;
  64                 uint8_t                 rea;
  65                 uint8_t                 rloh;
  66                 uint8_t                 rhoh;
  67         }                       timing;
  68         uint32_t                page_data_size;
  69         uint32_t                total_page_size;
  70         uint32_t                sectors_per_block;
  71         uint32_t                number_of_nands;                /* Ignored */
  72         uint32_t                total_internal_die;             /* Ignored */
  73         uint32_t                cell_type;                      /* Ignored */
  74         uint32_t                ecc_block_n_ecc_type;
  75         uint32_t                ecc_block_0_size;
  76         uint32_t                ecc_block_n_size;
  77         uint32_t                ecc_block_0_ecc_type;
  78         uint32_t                metadata_bytes;
  79         uint32_t                num_ecc_blocks_per_page;
  80         uint32_t                ecc_block_n_ecc_level_sdk;      /* Ignored */
  81         uint32_t                ecc_block_0_size_sdk;           /* Ignored */
  82         uint32_t                ecc_block_n_size_sdk;           /* Ignored */
  83         uint32_t                ecc_block_0_ecc_level_sdk;      /* Ignored */
  84         uint32_t                num_ecc_blocks_per_page_sdk;    /* Ignored */
  85         uint32_t                metadata_bytes_sdk;             /* Ignored */
  86         uint32_t                erase_threshold;
  87         uint32_t                boot_patch;
  88         uint32_t                patch_sectors;
  89         uint32_t                firmware1_starting_sector;
  90         uint32_t                firmware2_starting_sector;
  91         uint32_t                sectors_in_firmware1;
  92         uint32_t                sectors_in_firmware2;
  93         uint32_t                dbbt_search_area_start_address;
  94         uint32_t                badblock_marker_byte;
  95         uint32_t                badblock_marker_start_bit;
  96         uint32_t                bb_marker_physical_offset;
  97 };
  98
  99 struct mx28_nand_dbbt {
 100         uint32_t                checksum;
 101         uint32_t                fingerprint;
 102         uint32_t                version;
 103         uint32_t                number_bb;
 104         uint32_t                number_2k_pages_bb;
 105 };
 106
 107 struct mx28_nand_bbt {
 108         uint32_t                nand;
 109         uint32_t                number_bb;
 110         uint32_t                badblock[510];
 111 };
 112
 113 struct mx28_sd_drive_info {
 114         uint32_t                chip_num;
 115         uint32_t                drive_type;
 116         uint32_t                tag;
 117         uint32_t                first_sector_number;
 118         uint32_t                sector_count;
 119 };
 120
 121 struct mx28_sd_config_block {
 122         uint32_t                        signature;
 123         uint32_t                        primary_boot_tag;
 124         uint32_t                        secondary_boot_tag;
 125         uint32_t                        num_copies;
 126         struct mx28_sd_drive_info       drv_info[1];
 127 };
 128
 129 static inline uint32_t mx28_nand_ecc_size_in_bits(uint32_t ecc_strength)
 130 {
 131         return ecc_strength * MXS_NAND_BITS_PER_ECC_LEVEL;
 132 }
 133
 134 static inline uint32_t mx28_nand_get_ecc_strength(uint32_t page_data_size,
 135                                                 uint32_t page_oob_size)
 136 {
 137         if (page_data_size == 2048)
 138                 return 8;
 139
 140         if (page_data_size == 4096) {
 141                 if (page_oob_size == 128)
 142                         return 8;
 143
 144                 if (page_oob_size == 218)
 145                         return 16;
 146
 147                 if (page_oob_size == 224)
 148                         return 16;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static inline uint32_t mx28_nand_get_mark_offset(uint32_t page_data_size,
 155                                                 uint32_t ecc_strength)
 156 {
 157         uint32_t chunk_data_size_in_bits;
 158         uint32_t chunk_ecc_size_in_bits;
 159         uint32_t chunk_total_size_in_bits;
 160         uint32_t block_mark_chunk_number;
 161         uint32_t block_mark_chunk_bit_offset;
 162         uint32_t block_mark_bit_offset;
 163
 164         chunk_data_size_in_bits = MXS_NAND_CHUNK_DATA_CHUNK_SIZE * 8;
 165         chunk_ecc_size_in_bits  = mx28_nand_ecc_size_in_bits(ecc_strength);
 166
 167         chunk_total_size_in_bits =
 168                         chunk_data_size_in_bits + chunk_ecc_size_in_bits;
 169
 170         /* Compute the bit offset of the block mark within the physical page. */
 171         block_mark_bit_offset = page_data_size * 8;
 172
 173         /* Subtract the metadata bits. */
 174         block_mark_bit_offset -= MXS_NAND_METADATA_SIZE * 8;
 175
 176         /*
 177          * Compute the chunk number (starting at zero) in which the block mark
 178          * appears.
 179          */
 180         block_mark_chunk_number =
 181                         block_mark_bit_offset / chunk_total_size_in_bits;
 182
 183         /*
 184          * Compute the bit offset of the block mark within its chunk, and
 185          * validate it.
 186          */
 187         block_mark_chunk_bit_offset = block_mark_bit_offset -
 188                         (block_mark_chunk_number * chunk_total_size_in_bits);
 189
 190         if (block_mark_chunk_bit_offset > chunk_data_size_in_bits)
 191                 return 1;
 192
 193         /*
 194          * Now that we know the chunk number in which the block mark appears,
 195          * we can subtract all the ECC bits that appear before it.
 196          */
 197         block_mark_bit_offset -=
 198                 block_mark_chunk_number * chunk_ecc_size_in_bits;
 199
 200         return block_mark_bit_offset;
 201 }
 202
 203 static inline uint32_t mx28_nand_mark_byte_offset(void)
 204 {
 205         uint32_t ecc_strength;
 206         ecc_strength = mx28_nand_get_ecc_strength(nand_writesize, nand_oobsize);
 207         return mx28_nand_get_mark_offset(nand_writesize, ecc_strength) >> 3;
 208 }
 209
 210 static inline uint32_t mx28_nand_mark_bit_offset(void)
 211 {
 212         uint32_t ecc_strength;
 213         ecc_strength = mx28_nand_get_ecc_strength(nand_writesize, nand_oobsize);
 214         return mx28_nand_get_mark_offset(nand_writesize, ecc_strength) & 0x7;
 215 }
 216
 217 static uint32_t mx28_nand_block_csum(uint8_t *block, uint32_t size)
 218 {
 219         uint32_t csum = 0;
 220         int i;
 221
 222         for (i = 0; i < size; i++)
 223                 csum += block[i];
 224
 225         return csum ^ 0xffffffff;
 226 }
 227
 228 static struct mx28_nand_fcb *mx28_nand_get_fcb(uint32_t size)
 229 {
 230         struct mx28_nand_fcb *fcb;
 231         uint32_t bcb_size_bytes;
 232         uint32_t stride_size_bytes;
 233         uint32_t bootstream_size_pages;
 234         uint32_t fw1_start_page;
 235         uint32_t fw2_start_page;
 236
 237         fcb = malloc(nand_writesize);
 238         if (!fcb) {
 239                 printf("MX28 NAND: Unable to allocate FCB\n");
 240                 return NULL;
 241         }
 242
 243         memset(fcb, 0, nand_writesize);
 244
 245         fcb->fingerprint =                      0x20424346;
 246         fcb->version =                          0x01000000;
 247
 248         /*
 249          * FIXME: These here are default values as found in kobs-ng. We should
 250          * probably retrieve the data from NAND or something.
 251          */
 252         fcb->timing.data_setup =                80;
 253         fcb->timing.data_hold =                 60;
 254         fcb->timing.address_setup =             25;
 255         fcb->timing.dsample_time =              6;
 256
 257         fcb->page_data_size =           nand_writesize;
 258         fcb->total_page_size =          nand_writesize + nand_oobsize;
 259         fcb->sectors_per_block =        nand_erasesize / nand_writesize;
 260
 261         fcb->num_ecc_blocks_per_page =  (nand_writesize / 512) - 1;
 262         fcb->ecc_block_0_size =         512;
 263         fcb->ecc_block_n_size =         512;
 264         fcb->metadata_bytes =           10;
 265
 266         if (nand_writesize == 2048) {
 267                 fcb->ecc_block_n_ecc_type =             4;
 268                 fcb->ecc_block_0_ecc_type =             4;
 269         } else if (nand_writesize == 4096) {
 270                 if (nand_oobsize == 128) {
 271                         fcb->ecc_block_n_ecc_type =     4;
 272                         fcb->ecc_block_0_ecc_type =     4;
 273                 } else if (nand_oobsize == 218) {
 274                         fcb->ecc_block_n_ecc_type =     8;
 275                         fcb->ecc_block_0_ecc_type =     8;
 276                 } else if (nand_oobsize == 224) {
 277                         fcb->ecc_block_n_ecc_type =     8;
 278                         fcb->ecc_block_0_ecc_type =     8;
 279                 }
 280         }
 281
 282         if (fcb->ecc_block_n_ecc_type == 0) {
 283                 printf("MX28 NAND: Unsupported NAND geometry\n");
 284                 goto err;
 285         }
 286
 287         fcb->boot_patch =                       0;
 288         fcb->patch_sectors =                    0;
 289
 290         fcb->badblock_marker_byte =     mx28_nand_mark_byte_offset();
 291         fcb->badblock_marker_start_bit = mx28_nand_mark_bit_offset();
 292         fcb->bb_marker_physical_offset = nand_writesize;
 293
 294         stride_size_bytes = STRIDE_PAGES * nand_writesize;
 295         bcb_size_bytes = stride_size_bytes * STRIDE_COUNT;
 296
 297         bootstream_size_pages = (size + (nand_writesize - 1)) /
 298                                         nand_writesize;
 299
 300         fw1_start_page = 2 * bcb_size_bytes / nand_writesize;
 301         fw2_start_page = (2 * bcb_size_bytes + MAX_BOOTSTREAM_SIZE) /
 302                                 nand_writesize;
 303
 304         fcb->firmware1_starting_sector =        fw1_start_page;
 305         fcb->firmware2_starting_sector =        fw2_start_page;
 306         fcb->sectors_in_firmware1 =             bootstream_size_pages;
 307         fcb->sectors_in_firmware2 =             bootstream_size_pages;
 308
 309         fcb->dbbt_search_area_start_address =   STRIDE_PAGES * STRIDE_COUNT;
 310
 311         return fcb;
 312
 313 err:
 314         free(fcb);
 315         return NULL;
 316 }
 317
 318 static struct mx28_nand_dbbt *mx28_nand_get_dbbt(void)
 319 {
 320         struct mx28_nand_dbbt *dbbt;
 321
 322         dbbt = malloc(nand_writesize);
 323         if (!dbbt) {
 324                 printf("MX28 NAND: Unable to allocate DBBT\n");
 325                 return NULL;
 326         }
 327
 328         memset(dbbt, 0, nand_writesize);
 329
 330         dbbt->fingerprint       = 0x54424244;
 331         dbbt->version           = 0x1;
 332
 333         return dbbt;
 334 }
 335
 336 static inline uint8_t mx28_nand_parity_13_8(const uint8_t b)
 337 {
 338         uint32_t parity = 0, tmp;
 339
 340         tmp = ((b >> 6) ^ (b >> 5) ^ (b >> 3) ^ (b >> 2)) & 1;
 341         parity |= tmp << 0;
 342
 343         tmp = ((b >> 7) ^ (b >> 5) ^ (b >> 4) ^ (b >> 2) ^ (b >> 1)) & 1;
 344         parity |= tmp << 1;
 345
 346         tmp = ((b >> 7) ^ (b >> 6) ^ (b >> 5) ^ (b >> 1) ^ (b >> 0)) & 1;
 347         parity |= tmp << 2;
 348
 349         tmp = ((b >> 7) ^ (b >> 4) ^ (b >> 3) ^ (b >> 0)) & 1;
 350         parity |= tmp << 3;
 351
 352         tmp = ((b >> 6) ^ (b >> 4) ^ (b >> 3) ^
 353                 (b >> 2) ^ (b >> 1) ^ (b >> 0)) & 1;
 354         parity |= tmp << 4;
 355
 356         return parity;
 357 }
 358
 359 static uint8_t *mx28_nand_fcb_block(struct mx28_nand_fcb *fcb)
 360 {
 361         uint8_t *block;
 362         uint8_t *ecc;
 363         int i;
 364
 365         block = malloc(nand_writesize + nand_oobsize);
 366         if (!block) {
 367                 printf("MX28 NAND: Unable to allocate FCB block\n");
 368                 return NULL;
 369         }
 370
 371         memset(block, 0, nand_writesize + nand_oobsize);
 372
 373         /* Update the FCB checksum */
 374         fcb->checksum = mx28_nand_block_csum(((uint8_t *)fcb) + 4, 508);
 375
 376         /* Figure 12-11. in iMX28RM, rev. 1, says FCB is at offset 12 */
 377         memcpy(block + 12, fcb, sizeof(struct mx28_nand_fcb));
 378
 379         /* ECC is at offset 12 + 512 */
 380         ecc = block + 12 + 512;
 381
 382         /* Compute the ECC parity */
 383         for (i = 0; i < sizeof(struct mx28_nand_fcb); i++)
 384                 ecc[i] = mx28_nand_parity_13_8(block[i + 12]);
 385
 386         return block;
 387 }
 388
 389 static int mx28_nand_write_fcb(struct mx28_nand_fcb *fcb, uint8_t *buf)
 390 {
 391         uint32_t offset;
 392         uint8_t *fcbblock;
 393         int ret = 0;
 394         int i;
 395
 396         fcbblock = mx28_nand_fcb_block(fcb);
 397         if (!fcbblock)
 398                 return -1;
 399
 400         for (i = 0; i < STRIDE_PAGES * STRIDE_COUNT; i += STRIDE_PAGES) {
 401                 offset = i * nand_writesize;
 402                 memcpy(buf + offset, fcbblock, nand_writesize + nand_oobsize);
 403                 /* Mark the NAND page is OK. */
 404                 buf[offset + nand_writesize] = 0xff;
 405         }
 406
 407         free(fcbblock);
 408         return ret;
 409 }
 410
 411 static int mx28_nand_write_dbbt(struct mx28_nand_dbbt *dbbt, uint8_t *buf)
 412 {
 413         uint32_t offset;
 414         int i = STRIDE_PAGES * STRIDE_COUNT;
 415
 416         for (; i < 2 * STRIDE_PAGES * STRIDE_COUNT; i += STRIDE_PAGES) {
 417                 offset = i * nand_writesize;
 418                 memcpy(buf + offset, dbbt, sizeof(struct mx28_nand_dbbt));
 419         }
 420
 421         return 0;
 422 }
 423
 424 static int mx28_nand_write_firmware(struct mx28_nand_fcb *fcb, int infd,
 425                                     uint8_t *buf)
 426 {
 427         int ret;
 428         off_t size;
 429         uint32_t offset1, offset2;
 430
 431         size = lseek(infd, 0, SEEK_END);
 432         lseek(infd, 0, SEEK_SET);
 433
 434         offset1 = fcb->firmware1_starting_sector * nand_writesize;
 435         offset2 = fcb->firmware2_starting_sector * nand_writesize;
 436
 437         ret = read(infd, buf + offset1, size);
 438         if (ret != size)
 439                 return -1;
 440
 441         memcpy(buf + offset2, buf + offset1, size);
 442
 443         return 0;
 444 }
 445
 446 static void usage(void)
 447 {
 448         printf(
 449                 "Usage: mxsboot [ops] <type> <infile> <outfile>\n"
 450                 "Augment BootStream file with a proper header for i.MX28 boot\n"
 451                 "\n"
 452                 "  <type>       type of image:\n"
 453                 "                 \"nand\" for NAND image\n"
 454                 "                 \"sd\" for SD image\n"
 455                 "  <infile>     input file, the u-boot.sb bootstream\n"
 456                 "  <outfile>    output file, the bootable image\n"
 457                 "\n");
 458         printf(
 459                 "For NAND boot, these options are accepted:\n"
 460                 "  -w <size>    NAND page size\n"
 461                 "  -o <size>    NAND OOB size\n"
 462                 "  -e <size>    NAND erase size\n"
 463                 "\n"
 464                 "For SD boot, these options are accepted:\n"
 465                 "  -p <sector>  Sector where the SGTL partition starts\n"
 466         );
 467 }
 468
 469 static int mx28_create_nand_image(int infd, int outfd)
 470 {
 471         struct mx28_nand_fcb *fcb;
 472         struct mx28_nand_dbbt *dbbt;
 473         int ret = -1;
 474         uint8_t *buf;
 475         int size;
 476         ssize_t wr_size;
 477
 478         size = nand_writesize * 512 + 2 * MAX_BOOTSTREAM_SIZE;
 479
 480         buf = malloc(size);
 481         if (!buf) {
 482                 printf("Can not allocate output buffer of %d bytes\n", size);
 483                 goto err0;
 484         }
 485
 486         memset(buf, 0, size);
 487
 488         fcb = mx28_nand_get_fcb(MAX_BOOTSTREAM_SIZE);
 489         if (!fcb) {
 490                 printf("Unable to compile FCB\n");
 491                 goto err1;
 492         }
 493
 494         dbbt = mx28_nand_get_dbbt();
 495         if (!dbbt) {
 496                 printf("Unable to compile DBBT\n");
 497                 goto err2;
 498         }
 499
 500         ret = mx28_nand_write_fcb(fcb, buf);
 501         if (ret) {
 502                 printf("Unable to write FCB to buffer\n");
 503                 goto err3;
 504         }
 505
 506         ret = mx28_nand_write_dbbt(dbbt, buf);
 507         if (ret) {
 508                 printf("Unable to write DBBT to buffer\n");
 509                 goto err3;
 510         }
 511
 512         ret = mx28_nand_write_firmware(fcb, infd, buf);
 513         if (ret) {
 514                 printf("Unable to write firmware to buffer\n");
 515                 goto err3;
 516         }
 517
 518         wr_size = write(outfd, buf, size);
 519         if (wr_size != size) {
 520                 ret = -1;
 521                 goto err3;
 522         }
 523
 524         ret = 0;
 525
 526 err3:
 527         free(dbbt);
 528 err2:
 529         free(fcb);
 530 err1:
 531         free(buf);
 532 err0:
 533         return ret;
 534 }
 535
 536 static int mx28_create_sd_image(int infd, int outfd)
 537 {
 538         int ret = -1;
 539         uint32_t *buf;
 540         int size;
 541         off_t fsize;
 542         ssize_t wr_size;
 543         struct mx28_sd_config_block *cb;
 544
 545         fsize = lseek(infd, 0, SEEK_END);
 546         lseek(infd, 0, SEEK_SET);
 547         size = fsize + 4 * 512;
 548
 549         buf = malloc(size);
 550         if (!buf) {
 551                 printf("Can not allocate output buffer of %d bytes\n", size);
 552                 goto err0;
 553         }
 554
 555         ret = read(infd, (uint8_t *)buf + 4 * 512, fsize);
 556         if (ret != fsize) {
 557                 ret = -1;
 558                 goto err1;
 559         }
 560
 561         cb = (struct mx28_sd_config_block *)buf;
 562
 563         cb->signature = 0x00112233;
 564         cb->primary_boot_tag = 0x1;
 565         cb->secondary_boot_tag = 0x1;
 566         cb->num_copies = 1;
 567         cb->drv_info[0].chip_num = 0x0;
 568         cb->drv_info[0].drive_type = 0x0;
 569         cb->drv_info[0].tag = 0x1;
 570         cb->drv_info[0].first_sector_number = sd_sector + 4;
 571         cb->drv_info[0].sector_count = (size - 4) / 512;
 572
 573         wr_size = write(outfd, buf, size);
 574         if (wr_size != size) {
 575                 ret = -1;
 576                 goto err1;
 577         }
 578
 579         ret = 0;
 580
 581 err1:
 582         free(buf);
 583 err0:
 584         return ret;
 585 }
 586
 587 static int parse_ops(int argc, char **argv)
 588 {
 589         int i;
 590         int tmp;
 591         char *end;
 592         enum param {
 593                 PARAM_WRITE,
 594                 PARAM_OOB,
 595                 PARAM_ERASE,
 596                 PARAM_PART,
 597                 PARAM_SD,
 598                 PARAM_NAND
 599         };
 600         int type;
 601
 602         if (argc < 4)
 603                 return -1;
 604
 605         for (i = 1; i < argc; i++) {
 606                 if (!strncmp(argv[i], "-w", 2))
 607                         type = PARAM_WRITE;
 608                 else if (!strncmp(argv[i], "-o", 2))
 609                         type = PARAM_OOB;
 610                 else if (!strncmp(argv[i], "-e", 2))
 611                         type = PARAM_ERASE;
 612                 else if (!strncmp(argv[i], "-p", 2))
 613                         type = PARAM_PART;
 614                 else    /* SD/MMC */
 615                         break;
 616
 617                 tmp = strtol(argv[++i], &end, 10);
 618                 if (tmp % 2)
 619                         return -1;
 620                 if (tmp <= 0)
 621                         return -1;
 622
 623                 if (type == PARAM_WRITE)
 624                         nand_writesize = tmp;
 625                 if (type == PARAM_OOB)
 626                         nand_oobsize = tmp;
 627                 if (type == PARAM_ERASE)
 628                         nand_erasesize = tmp;
 629                 if (type == PARAM_PART)
 630                         sd_sector = tmp;
 631         }
 632
 633         if (strcmp(argv[i], "sd") && strcmp(argv[i], "nand"))
 634                 return -1;
 635
 636         if (i + 3 != argc)
 637                 return -1;
 638
 639         return i;
 640 }
 641
 642 int main(int argc, char **argv)
 643 {
 644         int infd, outfd;
 645         int ret = 0;
 646         int offset;
 647
 648         offset = parse_ops(argc, argv);
 649         if (offset < 0) {
 650                 usage();
 651                 ret = 1;
 652                 goto err1;
 653         }
 654
 655         infd = open(argv[offset + 1], O_RDONLY);
 656         if (infd < 0) {
 657                 printf("Input BootStream file can not be opened\n");
 658                 ret = 2;
 659                 goto err1;
 660         }
 661
 662         outfd = open(argv[offset + 2], O_CREAT | O_TRUNC | O_WRONLY,
 663                                         S_IRUSR | S_IWUSR);
 664         if (outfd < 0) {
 665                 printf("Output file can not be created\n");
 666                 ret = 3;
 667                 goto err2;
 668         }
 669
 670         if (!strcmp(argv[offset], "sd"))
 671                 ret = mx28_create_sd_image(infd, outfd);
 672         else if (!strcmp(argv[offset], "nand"))
 673                 ret = mx28_create_nand_image(infd, outfd);
 674
 675         close(outfd);
 676 err2:
 677         close(infd);
 678 err1:
 679         return ret;
 680 }