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 /* Taken from <linux/kernel.h> */
  18 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
  19 #define round_down(x, y) ((x) & ~__round_mask(x, y))
  20
  21 /*
  22  * Default BCB layout.
  23  *
  24  * TWEAK this if you have blown any OCOTP fuses.
  25  */
  26 #define STRIDE_PAGES            64
  27 #define STRIDE_COUNT            4
  28
  29 /*
  30  * Layout for 256Mb big NAND with 2048b page size, 64b OOB size and
  31  * 128kb erase size.
  32  *
  33  * TWEAK this if you have different kind of NAND chip.
  34  */
  35 static uint32_t nand_writesize = 2048;
  36 static uint32_t nand_oobsize = 64;
  37 static uint32_t nand_erasesize = 128 * 1024;
  38
  39 /*
  40  * Sector on which the SigmaTel boot partition (0x53) starts.
  41  */
  42 static uint32_t sd_sector = 2048;
  43
  44 /*
  45  * Each of the U-Boot bootstreams is at maximum 1MB big.
  46  *
  47  * TWEAK this if, for some wild reason, you need to boot bigger image.
  48  */
  49 #define MAX_BOOTSTREAM_SIZE     (1 * 1024 * 1024)
  50
  51 /* i.MX28 NAND controller-specific constants. DO NOT TWEAK! */
  52 #define MXS_NAND_DMA_DESCRIPTOR_COUNT           4
  53 #define MXS_NAND_CHUNK_DATA_CHUNK_SIZE          512
  54 #define MXS_NAND_METADATA_SIZE                  10
  55 #define MXS_NAND_BITS_PER_ECC_LEVEL             13
  56 #define MXS_NAND_COMMAND_BUFFER_SIZE            32
  57
  58 struct mx28_nand_fcb {
  59         uint32_t                checksum;
  60         uint32_t                fingerprint;
  61         uint32_t                version;
  62         struct {
  63                 uint8_t                 data_setup;
  64                 uint8_t                 data_hold;
  65                 uint8_t                 address_setup;
  66                 uint8_t                 dsample_time;
  67                 uint8_t                 nand_timing_state;
  68                 uint8_t                 rea;
  69                 uint8_t                 rloh;
  70                 uint8_t                 rhoh;
  71         }                       timing;
  72         uint32_t                page_data_size;
  73         uint32_t                total_page_size;
  74         uint32_t                sectors_per_block;
  75         uint32_t                number_of_nands;                /* Ignored */
  76         uint32_t                total_internal_die;             /* Ignored */
  77         uint32_t                cell_type;                      /* Ignored */
  78         uint32_t                ecc_block_n_ecc_type;
  79         uint32_t                ecc_block_0_size;
  80         uint32_t                ecc_block_n_size;
  81         uint32_t                ecc_block_0_ecc_type;
  82         uint32_t                metadata_bytes;
  83         uint32_t                num_ecc_blocks_per_page;
  84         uint32_t                ecc_block_n_ecc_level_sdk;      /* Ignored */
  85         uint32_t                ecc_block_0_size_sdk;           /* Ignored */
  86         uint32_t                ecc_block_n_size_sdk;           /* Ignored */
  87         uint32_t                ecc_block_0_ecc_level_sdk;      /* Ignored */
  88         uint32_t                num_ecc_blocks_per_page_sdk;    /* Ignored */
  89         uint32_t                metadata_bytes_sdk;             /* Ignored */
  90         uint32_t                erase_threshold;
  91         uint32_t                boot_patch;
  92         uint32_t                patch_sectors;
  93         uint32_t                firmware1_starting_sector;
  94         uint32_t                firmware2_starting_sector;
  95         uint32_t                sectors_in_firmware1;
  96         uint32_t                sectors_in_firmware2;
  97         uint32_t                dbbt_search_area_start_address;
  98         uint32_t                badblock_marker_byte;
  99         uint32_t                badblock_marker_start_bit;
 100         uint32_t                bb_marker_physical_offset;
 101 };
 102
 103 struct mx28_nand_dbbt {
 104         uint32_t                checksum;
 105         uint32_t                fingerprint;
 106         uint32_t                version;
 107         uint32_t                number_bb;
 108         uint32_t                number_2k_pages_bb;
 109 };
 110
 111 struct mx28_nand_bbt {
 112         uint32_t                nand;
 113         uint32_t                number_bb;
 114         uint32_t                badblock[510];
 115 };
 116
 117 struct mx28_sd_drive_info {
 118         uint32_t                chip_num;
 119         uint32_t                drive_type;
 120         uint32_t                tag;
 121         uint32_t                first_sector_number;
 122         uint32_t                sector_count;
 123 };
 124
 125 struct mx28_sd_config_block {
 126         uint32_t                        signature;
 127         uint32_t                        primary_boot_tag;
 128         uint32_t                        secondary_boot_tag;
 129         uint32_t                        num_copies;
 130         struct mx28_sd_drive_info       drv_info[1];
 131 };
 132
 133 static inline uint32_t mx28_nand_ecc_chunk_cnt(uint32_t page_data_size)
 134 {
 135         return page_data_size / MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
 136 }
 137
 138 static inline uint32_t mx28_nand_ecc_size_in_bits(uint32_t ecc_strength)
 139 {
 140         return ecc_strength * MXS_NAND_BITS_PER_ECC_LEVEL;
 141 }
 142
 143 static inline uint32_t mx28_nand_get_ecc_strength(uint32_t page_data_size,
 144                                                 uint32_t page_oob_size)
 145 {
 146         int ecc_strength;
 147
 148         /*
 149          * Determine the ECC layout with the formula:
 150          *      ECC bits per chunk = (total page spare data bits) /
 151          *              (bits per ECC level) / (chunks per page)
 152          * where:
 153          *      total page spare data bits =
 154          *              (page oob size - meta data size) * (bits per byte)
 155          */
 156         ecc_strength = ((page_oob_size - MXS_NAND_METADATA_SIZE) * 8)
 157                         / (MXS_NAND_BITS_PER_ECC_LEVEL *
 158                                 mx28_nand_ecc_chunk_cnt(page_data_size));
 159
 160         return round_down(ecc_strength, 2);
 161 }
 162
 163 static inline uint32_t mx28_nand_get_mark_offset(uint32_t page_data_size,
 164                                                 uint32_t ecc_strength)
 165 {
 166         uint32_t chunk_data_size_in_bits;
 167         uint32_t chunk_ecc_size_in_bits;
 168         uint32_t chunk_total_size_in_bits;
 169         uint32_t block_mark_chunk_number;
 170         uint32_t block_mark_chunk_bit_offset;
 171         uint32_t block_mark_bit_offset;
 172
 173         chunk_data_size_in_bits = MXS_NAND_CHUNK_DATA_CHUNK_SIZE * 8;
 174         chunk_ecc_size_in_bits  = mx28_nand_ecc_size_in_bits(ecc_strength);
 175
 176         chunk_total_size_in_bits =
 177                         chunk_data_size_in_bits + chunk_ecc_size_in_bits;
 178
 179         /* Compute the bit offset of the block mark within the physical page. */
 180         block_mark_bit_offset = page_data_size * 8;
 181
 182         /* Subtract the metadata bits. */
 183         block_mark_bit_offset -= MXS_NAND_METADATA_SIZE * 8;
 184
 185         /*
 186          * Compute the chunk number (starting at zero) in which the block mark
 187          * appears.
 188          */
 189         block_mark_chunk_number =
 190                         block_mark_bit_offset / chunk_total_size_in_bits;
 191
 192         /*
 193          * Compute the bit offset of the block mark within its chunk, and
 194          * validate it.
 195          */
 196         block_mark_chunk_bit_offset = block_mark_bit_offset -
 197                         (block_mark_chunk_number * chunk_total_size_in_bits);
 198
 199         if (block_mark_chunk_bit_offset > chunk_data_size_in_bits)
 200                 return 1;
 201
 202         /*
 203          * Now that we know the chunk number in which the block mark appears,
 204          * we can subtract all the ECC bits that appear before it.
 205          */
 206         block_mark_bit_offset -=
 207                 block_mark_chunk_number * chunk_ecc_size_in_bits;
 208
 209         return block_mark_bit_offset;
 210 }
 211
 212 static inline uint32_t mx28_nand_mark_byte_offset(void)
 213 {
 214         uint32_t ecc_strength;
 215         ecc_strength = mx28_nand_get_ecc_strength(nand_writesize, nand_oobsize);
 216         return mx28_nand_get_mark_offset(nand_writesize, ecc_strength) >> 3;
 217 }
 218
 219 static inline uint32_t mx28_nand_mark_bit_offset(void)
 220 {
 221         uint32_t ecc_strength;
 222         ecc_strength = mx28_nand_get_ecc_strength(nand_writesize, nand_oobsize);
 223         return mx28_nand_get_mark_offset(nand_writesize, ecc_strength) & 0x7;
 224 }
 225
 226 static uint32_t mx28_nand_block_csum(uint8_t *block, uint32_t size)
 227 {
 228         uint32_t csum = 0;
 229         int i;
 230
 231         for (i = 0; i < size; i++)
 232                 csum += block[i];
 233
 234         return csum ^ 0xffffffff;
 235 }
 236
 237 static struct mx28_nand_fcb *mx28_nand_get_fcb(uint32_t size)
 238 {
 239         struct mx28_nand_fcb *fcb;
 240         uint32_t bcb_size_bytes;
 241         uint32_t stride_size_bytes;
 242         uint32_t bootstream_size_pages;
 243         uint32_t fw1_start_page;
 244         uint32_t fw2_start_page;
 245
 246         fcb = malloc(nand_writesize);
 247         if (!fcb) {
 248                 printf("MX28 NAND: Unable to allocate FCB\n");
 249                 return NULL;
 250         }
 251
 252         memset(fcb, 0, nand_writesize);
 253
 254         fcb->fingerprint =                      0x20424346;
 255         fcb->version =                          0x01000000;
 256
 257         /*
 258          * FIXME: These here are default values as found in kobs-ng. We should
 259          * probably retrieve the data from NAND or something.
 260          */
 261         fcb->timing.data_setup =                80;
 262         fcb->timing.data_hold =                 60;
 263         fcb->timing.address_setup =             25;
 264         fcb->timing.dsample_time =              6;
 265
 266         fcb->page_data_size =           nand_writesize;
 267         fcb->total_page_size =          nand_writesize + nand_oobsize;
 268         fcb->sectors_per_block =        nand_erasesize / nand_writesize;
 269
 270         fcb->num_ecc_blocks_per_page =  (nand_writesize / 512) - 1;
 271         fcb->ecc_block_0_size =         512;
 272         fcb->ecc_block_n_size =         512;
 273         fcb->metadata_bytes =           10;
 274
 275         if (nand_writesize == 2048) {
 276                 fcb->ecc_block_n_ecc_type =             4;
 277                 fcb->ecc_block_0_ecc_type =             4;
 278         } else if (nand_writesize == 4096) {
 279                 if (nand_oobsize == 128) {
 280                         fcb->ecc_block_n_ecc_type =     4;
 281                         fcb->ecc_block_0_ecc_type =     4;
 282                 } else if (nand_oobsize == 218) {
 283                         fcb->ecc_block_n_ecc_type =     8;
 284                         fcb->ecc_block_0_ecc_type =     8;
 285                 } else if (nand_oobsize == 224) {
 286                         fcb->ecc_block_n_ecc_type =     8;
 287                         fcb->ecc_block_0_ecc_type =     8;
 288                 }
 289         }
 290
 291         if (fcb->ecc_block_n_ecc_type == 0) {
 292                 printf("MX28 NAND: Unsupported NAND geometry\n");
 293                 goto err;
 294         }
 295
 296         fcb->boot_patch =                       0;
 297         fcb->patch_sectors =                    0;
 298
 299         fcb->badblock_marker_byte =     mx28_nand_mark_byte_offset();
 300         fcb->badblock_marker_start_bit = mx28_nand_mark_bit_offset();
 301         fcb->bb_marker_physical_offset = nand_writesize;
 302
 303         stride_size_bytes = STRIDE_PAGES * nand_writesize;
 304         bcb_size_bytes = stride_size_bytes * STRIDE_COUNT;
 305
 306         bootstream_size_pages = (size + (nand_writesize - 1)) /
 307                                         nand_writesize;
 308
 309         fw1_start_page = 2 * bcb_size_bytes / nand_writesize;
 310         fw2_start_page = (2 * bcb_size_bytes + MAX_BOOTSTREAM_SIZE) /
 311                                 nand_writesize;
 312
 313         fcb->firmware1_starting_sector =        fw1_start_page;
 314         fcb->firmware2_starting_sector =        fw2_start_page;
 315         fcb->sectors_in_firmware1 =             bootstream_size_pages;
 316         fcb->sectors_in_firmware2 =             bootstream_size_pages;
 317
 318         fcb->dbbt_search_area_start_address =   STRIDE_PAGES * STRIDE_COUNT;
 319
 320         return fcb;
 321
 322 err:
 323         free(fcb);
 324         return NULL;
 325 }
 326
 327 static struct mx28_nand_dbbt *mx28_nand_get_dbbt(void)
 328 {
 329         struct mx28_nand_dbbt *dbbt;
 330
 331         dbbt = malloc(nand_writesize);
 332         if (!dbbt) {
 333                 printf("MX28 NAND: Unable to allocate DBBT\n");
 334                 return NULL;
 335         }
 336
 337         memset(dbbt, 0, nand_writesize);
 338
 339         dbbt->fingerprint       = 0x54424244;
 340         dbbt->version           = 0x1;
 341
 342         return dbbt;
 343 }
 344
 345 static inline uint8_t mx28_nand_parity_13_8(const uint8_t b)
 346 {
 347         uint32_t parity = 0, tmp;
 348
 349         tmp = ((b >> 6) ^ (b >> 5) ^ (b >> 3) ^ (b >> 2)) & 1;
 350         parity |= tmp << 0;
 351
 352         tmp = ((b >> 7) ^ (b >> 5) ^ (b >> 4) ^ (b >> 2) ^ (b >> 1)) & 1;
 353         parity |= tmp << 1;
 354
 355         tmp = ((b >> 7) ^ (b >> 6) ^ (b >> 5) ^ (b >> 1) ^ (b >> 0)) & 1;
 356         parity |= tmp << 2;
 357
 358         tmp = ((b >> 7) ^ (b >> 4) ^ (b >> 3) ^ (b >> 0)) & 1;
 359         parity |= tmp << 3;
 360
 361         tmp = ((b >> 6) ^ (b >> 4) ^ (b >> 3) ^
 362                 (b >> 2) ^ (b >> 1) ^ (b >> 0)) & 1;
 363         parity |= tmp << 4;
 364
 365         return parity;
 366 }
 367
 368 static uint8_t *mx28_nand_fcb_block(struct mx28_nand_fcb *fcb)
 369 {
 370         uint8_t *block;
 371         uint8_t *ecc;
 372         int i;
 373
 374         block = malloc(nand_writesize + nand_oobsize);
 375         if (!block) {
 376                 printf("MX28 NAND: Unable to allocate FCB block\n");
 377                 return NULL;
 378         }
 379
 380         memset(block, 0, nand_writesize + nand_oobsize);
 381
 382         /* Update the FCB checksum */
 383         fcb->checksum = mx28_nand_block_csum(((uint8_t *)fcb) + 4, 508);
 384
 385         /* Figure 12-11. in iMX28RM, rev. 1, says FCB is at offset 12 */
 386         memcpy(block + 12, fcb, sizeof(struct mx28_nand_fcb));
 387
 388         /* ECC is at offset 12 + 512 */
 389         ecc = block + 12 + 512;
 390
 391         /* Compute the ECC parity */
 392         for (i = 0; i < sizeof(struct mx28_nand_fcb); i++)
 393                 ecc[i] = mx28_nand_parity_13_8(block[i + 12]);
 394
 395         return block;
 396 }
 397
 398 static int mx28_nand_write_fcb(struct mx28_nand_fcb *fcb, uint8_t *buf)
 399 {
 400         uint32_t offset;
 401         uint8_t *fcbblock;
 402         int ret = 0;
 403         int i;
 404
 405         fcbblock = mx28_nand_fcb_block(fcb);
 406         if (!fcbblock)
 407                 return -1;
 408
 409         for (i = 0; i < STRIDE_PAGES * STRIDE_COUNT; i += STRIDE_PAGES) {
 410                 offset = i * nand_writesize;
 411                 memcpy(buf + offset, fcbblock, nand_writesize + nand_oobsize);
 412                 /* Mark the NAND page is OK. */
 413                 buf[offset + nand_writesize] = 0xff;
 414         }
 415
 416         free(fcbblock);
 417         return ret;
 418 }
 419
 420 static int mx28_nand_write_dbbt(struct mx28_nand_dbbt *dbbt, uint8_t *buf)
 421 {
 422         uint32_t offset;
 423         int i = STRIDE_PAGES * STRIDE_COUNT;
 424
 425         for (; i < 2 * STRIDE_PAGES * STRIDE_COUNT; i += STRIDE_PAGES) {
 426                 offset = i * nand_writesize;
 427                 memcpy(buf + offset, dbbt, sizeof(struct mx28_nand_dbbt));
 428         }
 429
 430         return 0;
 431 }
 432
 433 static int mx28_nand_write_firmware(struct mx28_nand_fcb *fcb, int infd,
 434                                     uint8_t *buf)
 435 {
 436         int ret;
 437         off_t size;
 438         uint32_t offset1, offset2;
 439
 440         size = lseek(infd, 0, SEEK_END);
 441         lseek(infd, 0, SEEK_SET);
 442
 443         offset1 = fcb->firmware1_starting_sector * nand_writesize;
 444         offset2 = fcb->firmware2_starting_sector * nand_writesize;
 445
 446         ret = read(infd, buf + offset1, size);
 447         if (ret != size)
 448                 return -1;
 449
 450         memcpy(buf + offset2, buf + offset1, size);
 451
 452         return 0;
 453 }
 454
 455 static void usage(void)
 456 {
 457         printf(
 458                 "Usage: mxsboot [ops] <type> <infile> <outfile>\n"
 459                 "Augment BootStream file with a proper header for i.MX28 boot\n"
 460                 "\n"
 461                 "  <type>       type of image:\n"
 462                 "                 \"nand\" for NAND image\n"
 463                 "                 \"sd\" for SD image\n"
 464                 "  <infile>     input file, the u-boot.sb bootstream\n"
 465                 "  <outfile>    output file, the bootable image\n"
 466                 "\n");
 467         printf(
 468                 "For NAND boot, these options are accepted:\n"
 469                 "  -w <size>    NAND page size\n"
 470                 "  -o <size>    NAND OOB size\n"
 471                 "  -e <size>    NAND erase size\n"
 472                 "\n"
 473                 "For SD boot, these options are accepted:\n"
 474                 "  -p <sector>  Sector where the SGTL partition starts\n"
 475         );
 476 }
 477
 478 static int mx28_create_nand_image(int infd, int outfd)
 479 {
 480         struct mx28_nand_fcb *fcb;
 481         struct mx28_nand_dbbt *dbbt;
 482         int ret = -1;
 483         uint8_t *buf;
 484         int size;
 485         ssize_t wr_size;
 486
 487         size = nand_writesize * 512 + 2 * MAX_BOOTSTREAM_SIZE;
 488
 489         buf = malloc(size);
 490         if (!buf) {
 491                 printf("Can not allocate output buffer of %d bytes\n", size);
 492                 goto err0;
 493         }
 494
 495         memset(buf, 0, size);
 496
 497         fcb = mx28_nand_get_fcb(MAX_BOOTSTREAM_SIZE);
 498         if (!fcb) {
 499                 printf("Unable to compile FCB\n");
 500                 goto err1;
 501         }
 502
 503         dbbt = mx28_nand_get_dbbt();
 504         if (!dbbt) {
 505                 printf("Unable to compile DBBT\n");
 506                 goto err2;
 507         }
 508
 509         ret = mx28_nand_write_fcb(fcb, buf);
 510         if (ret) {
 511                 printf("Unable to write FCB to buffer\n");
 512                 goto err3;
 513         }
 514
 515         ret = mx28_nand_write_dbbt(dbbt, buf);
 516         if (ret) {
 517                 printf("Unable to write DBBT to buffer\n");
 518                 goto err3;
 519         }
 520
 521         ret = mx28_nand_write_firmware(fcb, infd, buf);
 522         if (ret) {
 523                 printf("Unable to write firmware to buffer\n");
 524                 goto err3;
 525         }
 526
 527         wr_size = write(outfd, buf, size);
 528         if (wr_size != size) {
 529                 ret = -1;
 530                 goto err3;
 531         }
 532
 533         ret = 0;
 534
 535 err3:
 536         free(dbbt);
 537 err2:
 538         free(fcb);
 539 err1:
 540         free(buf);
 541 err0:
 542         return ret;
 543 }
 544
 545 static int mx28_create_sd_image(int infd, int outfd)
 546 {
 547         int ret = -1;
 548         uint32_t *buf;
 549         int size;
 550         off_t fsize;
 551         ssize_t wr_size;
 552         struct mx28_sd_config_block *cb;
 553
 554         fsize = lseek(infd, 0, SEEK_END);
 555         lseek(infd, 0, SEEK_SET);
 556         size = fsize + 4 * 512;
 557
 558         buf = malloc(size);
 559         if (!buf) {
 560                 printf("Can not allocate output buffer of %d bytes\n", size);
 561                 goto err0;
 562         }
 563
 564         ret = read(infd, (uint8_t *)buf + 4 * 512, fsize);
 565         if (ret != fsize) {
 566                 ret = -1;
 567                 goto err1;
 568         }
 569
 570         cb = (struct mx28_sd_config_block *)buf;
 571
 572         cb->signature = 0x00112233;
 573         cb->primary_boot_tag = 0x1;
 574         cb->secondary_boot_tag = 0x1;
 575         cb->num_copies = 1;
 576         cb->drv_info[0].chip_num = 0x0;
 577         cb->drv_info[0].drive_type = 0x0;
 578         cb->drv_info[0].tag = 0x1;
 579         cb->drv_info[0].first_sector_number = sd_sector + 4;
 580         cb->drv_info[0].sector_count = (size - 4) / 512;
 581
 582         wr_size = write(outfd, buf, size);
 583         if (wr_size != size) {
 584                 ret = -1;
 585                 goto err1;
 586         }
 587
 588         ret = 0;
 589
 590 err1:
 591         free(buf);
 592 err0:
 593         return ret;
 594 }
 595
 596 static int parse_ops(int argc, char **argv)
 597 {
 598         int i;
 599         int tmp;
 600         char *end;
 601         enum param {
 602                 PARAM_WRITE,
 603                 PARAM_OOB,
 604                 PARAM_ERASE,
 605                 PARAM_PART,
 606                 PARAM_SD,
 607                 PARAM_NAND
 608         };
 609         int type;
 610
 611         if (argc < 4)
 612                 return -1;
 613
 614         for (i = 1; i < argc; i++) {
 615                 if (!strncmp(argv[i], "-w", 2))
 616                         type = PARAM_WRITE;
 617                 else if (!strncmp(argv[i], "-o", 2))
 618                         type = PARAM_OOB;
 619                 else if (!strncmp(argv[i], "-e", 2))
 620                         type = PARAM_ERASE;
 621                 else if (!strncmp(argv[i], "-p", 2))
 622                         type = PARAM_PART;
 623                 else    /* SD/MMC */
 624                         break;
 625
 626                 tmp = strtol(argv[++i], &end, 10);
 627                 if (tmp % 2)
 628                         return -1;
 629                 if (tmp <= 0)
 630                         return -1;
 631
 632                 if (type == PARAM_WRITE)
 633                         nand_writesize = tmp;
 634                 if (type == PARAM_OOB)
 635                         nand_oobsize = tmp;
 636                 if (type == PARAM_ERASE)
 637                         nand_erasesize = tmp;
 638                 if (type == PARAM_PART)
 639                         sd_sector = tmp;
 640         }
 641
 642         if (strcmp(argv[i], "sd") && strcmp(argv[i], "nand"))
 643                 return -1;
 644
 645         if (i + 3 != argc)
 646                 return -1;
 647
 648         return i;
 649 }
 650
 651 int main(int argc, char **argv)
 652 {
 653         int infd, outfd;
 654         int ret = 0;
 655         int offset;
 656
 657         offset = parse_ops(argc, argv);
 658         if (offset < 0) {
 659                 usage();
 660                 ret = 1;
 661                 goto err1;
 662         }
 663
 664         infd = open(argv[offset + 1], O_RDONLY);
 665         if (infd < 0) {
 666                 printf("Input BootStream file can not be opened\n");
 667                 ret = 2;
 668                 goto err1;
 669         }
 670
 671         outfd = open(argv[offset + 2], O_CREAT | O_TRUNC | O_WRONLY,
 672                                         S_IRUSR | S_IWUSR);
 673         if (outfd < 0) {
 674                 printf("Output file can not be created\n");
 675                 ret = 3;
 676                 goto err2;
 677         }
 678
 679         if (!strcmp(argv[offset], "sd"))
 680                 ret = mx28_create_sd_image(infd, outfd);
 681         else if (!strcmp(argv[offset], "nand"))
 682                 ret = mx28_create_nand_image(infd, outfd);
 683
 684         close(outfd);
 685 err2:
 686         close(infd);
 687 err1:
 688         return ret;
 689 }