board/karo/tx28/flash.c

   1 /*
   2  * Copyright (C) 2011-2014 Lothar Waßmann <LW@KARO-electronics.de>
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <common.h>
  19 #include <malloc.h>
  20 #include <nand.h>
  21 #include <errno.h>
  22
  23 #include <linux/err.h>
  24 #include <jffs2/load_kernel.h>
  25
  26 #include <asm/io.h>
  27 #include <asm/sizes.h>
  28 #include <asm/arch/regs-base.h>
  29 #include <asm/imx-common/regs-gpmi.h>
  30 #include <asm/imx-common/regs-bch.h>
  31
  32 struct mx28_nand_timing {
  33         u8 data_setup;
  34         u8 data_hold;
  35         u8 address_setup;
  36         u8 dsample_time;
  37         u8 nand_timing_state;
  38         u8 tREA;
  39         u8 tRLOH;
  40         u8 tRHOH;
  41 };
  42
  43 struct mx28_fcb {
  44         u32 checksum;
  45         u32 fingerprint;
  46         u32 version;
  47         struct mx28_nand_timing timing;
  48         u32 page_data_size;
  49         u32 total_page_size;
  50         u32 sectors_per_block;
  51         u32 number_of_nands;    /* not used by ROM code */
  52         u32 total_internal_die; /* not used by ROM code */
  53         u32 cell_type;          /* not used by ROM code */
  54         u32 ecc_blockn_type;
  55         u32 ecc_block0_size;
  56         u32 ecc_blockn_size;
  57         u32 ecc_block0_type;
  58         u32 metadata_size;
  59         u32 ecc_blocks_per_page;
  60         u32 rsrvd[6];            /* not used by ROM code */
  61         u32 bch_mode;
  62         u32 boot_patch;
  63         u32 patch_sectors;
  64         u32 fw1_start_page;
  65         u32 fw2_start_page;
  66         u32 fw1_sectors;
  67         u32 fw2_sectors;
  68         u32 dbbt_search_area;
  69         u32 bb_mark_byte;
  70         u32 bb_mark_startbit;
  71         u32 bb_mark_phys_offset;
  72 };
  73
  74 #define BF_VAL(v, bf)           (((v) & bf##_MASK) >> bf##_OFFSET)
  75
  76 static nand_info_t *mtd = &nand_info[0];
  77
  78 extern void *_start;
  79
  80 #define BIT(v,n)        (((v) >> (n)) & 0x1)
  81
  82 static u8 calculate_parity_13_8(u8 d)
  83 {
  84         u8 p = 0;
  85
  86         p |= (BIT(d, 6) ^ BIT(d, 5) ^ BIT(d, 3) ^ BIT(d, 2))             << 0;
  87         p |= (BIT(d, 7) ^ BIT(d, 5) ^ BIT(d, 4) ^ BIT(d, 2) ^ BIT(d, 1)) << 1;
  88         p |= (BIT(d, 7) ^ BIT(d, 6) ^ BIT(d, 5) ^ BIT(d, 1) ^ BIT(d, 0)) << 2;
  89         p |= (BIT(d, 7) ^ BIT(d, 4) ^ BIT(d, 3) ^ BIT(d, 0))             << 3;
  90         p |= (BIT(d, 6) ^ BIT(d, 4) ^ BIT(d, 3) ^ BIT(d, 2) ^ BIT(d, 1) ^ BIT(d, 0)) << 4;
  91         return p;
  92 }
  93
  94 static void encode_hamming_13_8(void *_src, void *_ecc, size_t size)
  95 {
  96         int i;
  97         u8 *src = _src;
  98         u8 *ecc = _ecc;
  99
 100         for (i = 0; i < size; i++)
 101                 ecc[i] = calculate_parity_13_8(src[i]);
 102 }
 103
 104 static u32 calc_chksum(void *buf, size_t size)
 105 {
 106         u32 chksum = 0;
 107         u8 *bp = buf;
 108         size_t i;
 109
 110         for (i = 0; i < size; i++) {
 111                 chksum += bp[i];
 112         }
 113         return ~chksum;
 114 }
 115
 116 /*
 117   Physical organisation of data in NAND flash:
 118   metadata
 119   payload chunk 0 (may be empty)
 120   ecc for metadata + payload chunk 0
 121   payload chunk 1
 122   ecc for payload chunk 1
 123 ...
 124   payload chunk n
 125   ecc for payload chunk n
 126  */
 127
 128 static int calc_bb_offset(nand_info_t *mtd, struct mx28_fcb *fcb)
 129 {
 130         int bb_mark_offset;
 131         int chunk_data_size = fcb->ecc_blockn_size * 8;
 132         int chunk_ecc_size = (fcb->ecc_blockn_type << 1) * 13;
 133         int chunk_total_size = chunk_data_size + chunk_ecc_size;
 134         int bb_mark_chunk, bb_mark_chunk_offs;
 135
 136         bb_mark_offset = (mtd->writesize - fcb->metadata_size) * 8;
 137         if (fcb->ecc_block0_size == 0)
 138                 bb_mark_offset -= (fcb->ecc_block0_type << 1) * 13;
 139
 140         bb_mark_chunk = bb_mark_offset / chunk_total_size;
 141         bb_mark_chunk_offs = bb_mark_offset - (bb_mark_chunk * chunk_total_size);
 142         if (bb_mark_chunk_offs > chunk_data_size) {
 143                 printf("Unsupported ECC layout; BB mark resides in ECC data: %u\n",
 144                         bb_mark_chunk_offs);
 145                 return -EINVAL;
 146         }
 147         bb_mark_offset -= bb_mark_chunk * chunk_ecc_size;
 148         return bb_mark_offset;
 149 }
 150
 151 /*
 152  * return number of blocks to skip for a contiguous partition
 153  * of given # blocks
 154  */
 155 static int find_contig_space(int block, int num_blocks, int max_blocks)
 156 {
 157         int skip = 0;
 158         int found = 0;
 159         int last = block + max_blocks;
 160
 161         debug("Searching %u contiguous blocks from %d..%d\n",
 162                 num_blocks, block, block + max_blocks - 1);
 163         for (; block < last; block++) {
 164                 if (nand_block_isbad(mtd, block * mtd->erasesize)) {
 165                         skip += found + 1;
 166                         found = 0;
 167                         debug("Skipping %u blocks to %u\n",
 168                                 skip, block + 1);
 169                 } else {
 170                         found++;
 171                         if (found >= num_blocks) {
 172                                 debug("Found %u good blocks from %d..%d\n",
 173                                         found, block - found + 1, block);
 174                                 return skip;
 175                         }
 176                 }
 177         }
 178         return -ENOSPC;
 179 }
 180
 181 #define pr_fcb_val(p, n)        debug("%s=%08x(%d)\n", #n, (p)->n, (p)->n)
 182
 183 static struct mx28_fcb *create_fcb(void *buf, int fw1_start_block,
 184                                 int fw2_start_block, int fw_num_blocks)
 185 {
 186         struct gpmi_regs *gpmi_base = (void *)GPMI_BASE_ADDRESS;
 187         struct bch_regs *bch_base = (void *)BCH_BASE_ADDRESS;
 188         u32 fl0, fl1;
 189         u32 t0;
 190         int metadata_size;
 191         int bb_mark_bit_offs;
 192         struct mx28_fcb *fcb;
 193         int fcb_offs;
 194
 195         if (gpmi_base == NULL || bch_base == NULL) {
 196                 return ERR_PTR(-ENOMEM);
 197         }
 198
 199         fl0 = readl(&bch_base->hw_bch_flash0layout0);
 200         fl1 = readl(&bch_base->hw_bch_flash0layout1);
 201         t0 = readl(&gpmi_base->hw_gpmi_timing0);
 202
 203         metadata_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_META_SIZE);
 204
 205         fcb = buf + ALIGN(metadata_size, 4);
 206         fcb_offs = (void *)fcb - buf;
 207
 208         memset(buf, 0xff, fcb_offs);
 209         memset(fcb, 0x00, sizeof(*fcb));
 210         memset(fcb + 1, 0xff, mtd->erasesize - fcb_offs - sizeof(*fcb));
 211
 212         strncpy((char *)&fcb->fingerprint, "FCB ", 4);
 213         fcb->version = cpu_to_be32(1);
 214
 215         /* ROM code assumes GPMI clock of 25 MHz */
 216         fcb->timing.data_setup = BF_VAL(t0, GPMI_TIMING0_DATA_SETUP) * 40;
 217         fcb->timing.data_hold = BF_VAL(t0, GPMI_TIMING0_DATA_HOLD) * 40;
 218         fcb->timing.address_setup = BF_VAL(t0, GPMI_TIMING0_ADDRESS_SETUP) * 40;
 219
 220         fcb->page_data_size = mtd->writesize;
 221         fcb->total_page_size = mtd->writesize + mtd->oobsize;
 222         fcb->sectors_per_block = mtd->erasesize / mtd->writesize;
 223
 224         fcb->ecc_block0_type = BF_VAL(fl0, BCH_FLASHLAYOUT0_ECC0);
 225         fcb->ecc_block0_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_DATA0_SIZE);
 226         fcb->ecc_blockn_type = BF_VAL(fl1, BCH_FLASHLAYOUT1_ECCN);
 227         fcb->ecc_blockn_size = BF_VAL(fl1, BCH_FLASHLAYOUT1_DATAN_SIZE);
 228
 229         pr_fcb_val(fcb, ecc_block0_type);
 230         pr_fcb_val(fcb, ecc_blockn_type);
 231         pr_fcb_val(fcb, ecc_block0_size);
 232         pr_fcb_val(fcb, ecc_blockn_size);
 233
 234         fcb->metadata_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_META_SIZE);
 235         fcb->ecc_blocks_per_page = BF_VAL(fl0, BCH_FLASHLAYOUT0_NBLOCKS);
 236         fcb->bch_mode = readl(&bch_base->hw_bch_mode);
 237
 238         fcb->fw1_start_page = fw1_start_block * fcb->sectors_per_block;
 239         fcb->fw1_sectors = fw_num_blocks * fcb->sectors_per_block;
 240         pr_fcb_val(fcb, fw1_start_page);
 241         pr_fcb_val(fcb, fw1_sectors);
 242
 243         if (fw2_start_block != 0 && fw2_start_block < mtd->size / mtd->erasesize) {
 244                 fcb->fw2_start_page = fw2_start_block * fcb->sectors_per_block;
 245                 fcb->fw2_sectors = fcb->fw1_sectors;
 246                 pr_fcb_val(fcb, fw2_start_page);
 247                 pr_fcb_val(fcb, fw2_sectors);
 248         }
 249
 250         fcb->dbbt_search_area = 1;
 251
 252         bb_mark_bit_offs = calc_bb_offset(mtd, fcb);
 253         if (bb_mark_bit_offs < 0)
 254                 return ERR_PTR(bb_mark_bit_offs);
 255         fcb->bb_mark_byte = bb_mark_bit_offs / 8;
 256         fcb->bb_mark_startbit = bb_mark_bit_offs % 8;
 257         fcb->bb_mark_phys_offset = mtd->writesize;
 258
 259         pr_fcb_val(fcb, bb_mark_byte);
 260         pr_fcb_val(fcb, bb_mark_startbit);
 261         pr_fcb_val(fcb, bb_mark_phys_offset);
 262
 263         fcb->checksum = calc_chksum(&fcb->fingerprint, 512 - 4);
 264         return fcb;
 265 }
 266
 267 static int find_fcb(void *ref, int page)
 268 {
 269         int ret = 0;
 270         struct nand_chip *chip = mtd->priv;
 271         void *buf = malloc(mtd->erasesize);
 272
 273         if (buf == NULL) {
 274                 return -ENOMEM;
 275         }
 276         chip->select_chip(mtd, 0);
 277         chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
 278         ret = chip->ecc.read_page_raw(mtd, chip, buf, 1, page);
 279         if (ret) {
 280                 printf("Failed to read FCB from page %u: %d\n", page, ret);
 281                 goto out;
 282         }
 283         if (memcmp(buf, ref, mtd->writesize) == 0) {
 284                 debug("Found FCB in page %u (%08x)\n",
 285                         page, page * mtd->writesize);
 286                 ret = 1;
 287         }
 288 out:
 289         chip->select_chip(mtd, -1);
 290         free(buf);
 291         return ret;
 292 }
 293
 294 static int write_fcb(void *buf, int block)
 295 {
 296         int ret;
 297         struct nand_chip *chip = mtd->priv;
 298         int page = block * mtd->erasesize / mtd->writesize;
 299
 300         ret = find_fcb(buf, page);
 301         if (ret > 0) {
 302                 printf("FCB at block %d is up to date\n", block);
 303                 return 0;
 304         }
 305
 306         ret = nand_erase(mtd, block * mtd->erasesize, mtd->erasesize);
 307         if (ret) {
 308                 printf("Failed to erase FCB block %u\n", block);
 309                 return ret;
 310         }
 311
 312         printf("Writing FCB to block %d @ %08llx\n", block,
 313                 (u64)block * mtd->erasesize);
 314         chip->select_chip(mtd, 0);
 315         ret = chip->write_page(mtd, chip, buf, 1, page, 0, 1);
 316         if (ret) {
 317                 printf("Failed to write FCB to block %u: %d\n", block, ret);
 318         }
 319         chip->select_chip(mtd, -1);
 320         return ret;
 321 }
 322
 323 #define chk_overlap(a,b)                                \
 324         ((a##_start_block <= b##_end_block &&           \
 325                 a##_end_block >= b##_start_block) ||    \
 326         (b##_start_block <= a##_end_block &&            \
 327                 b##_end_block >= a##_start_block))
 328
 329 #define fail_if_overlap(a,b,m1,m2) do {                         \
 330         if (chk_overlap(a, b)) {                                \
 331                 printf("%s blocks %lu..%lu overlap %s in blocks %lu..%lu!\n", \
 332                         m1, a##_start_block, a##_end_block,     \
 333                         m2, b##_start_block, b##_end_block);    \
 334                 return -EINVAL;                                 \
 335         }                                                       \
 336 } while (0)
 337
 338 static int tx28_prog_uboot(void *addr, int start_block, int skip,
 339                         size_t size, size_t max_len)
 340 {
 341         int ret;
 342         nand_erase_options_t erase_opts = { 0, };
 343         size_t actual;
 344         size_t prg_length = max_len - skip * mtd->erasesize;
 345         int prg_start = (start_block + skip) * mtd->erasesize;
 346
 347         erase_opts.offset = start_block * mtd->erasesize;
 348         erase_opts.length = max_len;
 349         erase_opts.quiet = 1;
 350
 351         printf("Erasing flash @ %08llx..%08llx\n", erase_opts.offset,
 352                 erase_opts.offset + erase_opts.length - 1);
 353         ret = nand_erase_opts(mtd, &erase_opts);
 354         if (ret) {
 355                 printf("Failed to erase flash: %d\n", ret);
 356                 return ret;
 357         }
 358
 359         printf("Programming flash @ %08llx..%08llx from %p\n",
 360                 (u64)start_block * mtd->erasesize,
 361                 (u64)start_block * mtd->erasesize + size - 1, addr);
 362         actual = size;
 363         ret = nand_write_skip_bad(mtd, prg_start, &actual, NULL,
 364                                 prg_length, addr, WITH_DROP_FFS);
 365         if (ret) {
 366                 printf("Failed to program flash: %d\n", ret);
 367                 return ret;
 368         }
 369         if (actual < size) {
 370                 printf("Could only write %u of %u bytes\n", actual, size);
 371                 return -EIO;
 372         }
 373         return 0;
 374 }
 375
 376 #ifdef CONFIG_ENV_IS_IN_NAND
 377 #ifndef CONFIG_ENV_OFFSET_REDUND
 378 #define TOTAL_ENV_SIZE CONFIG_ENV_RANGE
 379 #else
 380 #define TOTAL_ENV_SIZE (CONFIG_ENV_RANGE * 2)
 381 #endif
 382 #endif
 383
 384 int do_update(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 385 {
 386         int ret;
 387         const unsigned long fcb_start_block = 0, fcb_end_block = 0;
 388         int erase_size = mtd->erasesize;
 389         int page_size = mtd->writesize;
 390         void *buf;
 391         char *load_addr;
 392         char *file_size;
 393         size_t size = 0;
 394         void *addr = NULL;
 395         struct mx28_fcb *fcb;
 396         unsigned long mtd_num_blocks = mtd->size / mtd->erasesize;
 397 #ifdef CONFIG_ENV_IS_IN_NAND
 398         unsigned long env_start_block = CONFIG_ENV_OFFSET / mtd->erasesize;
 399         unsigned long env_end_block = env_start_block +
 400                 DIV_ROUND_UP(TOTAL_ENV_SIZE, mtd->erasesize) - 1;
 401 #endif
 402         int optind;
 403         int fw2_set = 0;
 404         unsigned long fw1_start_block = 0, fw1_end_block;
 405         unsigned long fw2_start_block = 0, fw2_end_block;
 406         unsigned long fw_num_blocks;
 407         int fw1_skip, fw2_skip;
 408         unsigned long extra_blocks = 0;
 409         size_t max_len1, max_len2;
 410         struct mtd_device *dev;
 411         struct part_info *part_info;
 412         struct part_info *redund_part_info;
 413         const char *uboot_part = "u-boot";
 414         const char *redund_part = NULL;
 415         u8 part_num;
 416         u8 redund_part_num;
 417
 418         ret = mtdparts_init();
 419         if (ret)
 420                 return ret;
 421
 422         for (optind = 1; optind < argc; optind++) {
 423                 char *endp;
 424
 425                 if (strcmp(argv[optind], "-f") == 0) {
 426                         if (optind >= argc - 1) {
 427                                 printf("Option %s requires an argument\n",
 428                                         argv[optind]);
 429                                 return -EINVAL;
 430                         }
 431                         optind++;
 432                         fw1_start_block = simple_strtoul(argv[optind], &endp, 0);
 433                         if (*endp != '\0') {
 434                                 uboot_part = argv[optind];
 435                                 continue;
 436                         }
 437                         uboot_part = NULL;
 438                         if (fw1_start_block >= mtd_num_blocks) {
 439                                 printf("Block number %lu is out of range: 0..%lu\n",
 440                                         fw1_start_block, mtd_num_blocks - 1);
 441                                 return -EINVAL;
 442                         }
 443                 } else if (strcmp(argv[optind], "-r") == 0) {
 444                         fw2_set = 1;
 445                         if (optind < argc - 1 && argv[optind + 1][0] != '-') {
 446                                 optind++;
 447                                 fw2_start_block = simple_strtoul(argv[optind],
 448                                                                 &endp, 0);
 449                                 if (*endp != '\0') {
 450                                         redund_part = argv[optind];
 451                                         continue;
 452                                 }
 453                                 if (fw2_start_block >= mtd_num_blocks) {
 454                                         printf("Block number %lu is out of range: 0..%lu\n",
 455                                                 fw2_start_block,
 456                                                 mtd_num_blocks - 1);
 457                                         return -EINVAL;
 458                                 }
 459                         }
 460                 } else if (strcmp(argv[optind], "-e") == 0) {
 461                         if (optind >= argc - 1) {
 462                                 printf("Option %s requires an argument\n",
 463                                         argv[optind]);
 464                                 return -EINVAL;
 465                         }
 466                         optind++;
 467                         extra_blocks = simple_strtoul(argv[optind], NULL, 0);
 468                         if (extra_blocks >= mtd_num_blocks) {
 469                                 printf("Extra block count %lu is out of range: 0..%lu\n",
 470                                         extra_blocks,
 471                                         mtd_num_blocks - 1);
 472                                 return -EINVAL;
 473                         }
 474                 } else if (argv[optind][0] == '-') {
 475                         printf("Unrecognized option %s\n", argv[optind]);
 476                         return -EINVAL;
 477                 } else {
 478                         break;
 479                 }
 480         }
 481
 482         load_addr = getenv("fileaddr");
 483         file_size = getenv("filesize");
 484
 485         if (argc - optind < 1 && load_addr == NULL) {
 486                 printf("Load address not specified\n");
 487                 return -EINVAL;
 488         }
 489         if (argc - optind < 2 && file_size == NULL) {
 490                 printf("WARNING: Image size not specified; overwriting whole uboot partition\n");
 491         }
 492         if (argc > optind) {
 493                 load_addr = NULL;
 494                 addr = (void *)simple_strtoul(argv[optind], NULL, 16);
 495                 optind++;
 496         }
 497         if (argc > optind) {
 498                 file_size = NULL;
 499                 size = simple_strtoul(argv[optind], NULL, 16);
 500                 optind++;
 501         }
 502         if (load_addr != NULL) {
 503                 addr = (void *)simple_strtoul(load_addr, NULL, 16);
 504                 printf("Using default load address %p\n", addr);
 505         }
 506         if (file_size != NULL) {
 507                 size = simple_strtoul(file_size, NULL, 16);
 508                 printf("Using default file size %08x\n", size);
 509         }
 510         if (size > 0) {
 511                 fw_num_blocks = DIV_ROUND_UP(size, mtd->erasesize);
 512         } else {
 513                 fw_num_blocks = part_info->size / mtd->erasesize -
 514                         extra_blocks;
 515                 size = fw_num_blocks * mtd->erasesize;
 516         }
 517
 518         if (uboot_part) {
 519                 ret = find_dev_and_part(uboot_part, &dev, &part_num,
 520                                         &part_info);
 521                 if (ret) {
 522                         printf("Failed to find '%s' partition: %d\n",
 523                                 uboot_part, ret);
 524                         return ret;
 525                 }
 526                 fw1_start_block = part_info->offset / mtd->erasesize;
 527                 max_len1 = part_info->size;
 528         } else {
 529                 max_len1 = (fw_num_blocks + extra_blocks) * mtd->erasesize;
 530         }
 531
 532         if (redund_part) {
 533                 ret = find_dev_and_part(redund_part, &dev, &redund_part_num,
 534                                         &redund_part_info);
 535                 if (ret) {
 536                         printf("Failed to find '%s' partition: %d\n",
 537                                 redund_part, ret);
 538                         return ret;
 539                 }
 540                 fw2_start_block = redund_part_info->offset / mtd->erasesize;
 541                 max_len2 = redund_part_info->size;
 542         } else if (fw2_set) {
 543                 max_len2 = (fw_num_blocks + extra_blocks) * mtd->erasesize;
 544         } else {
 545                 max_len2 = 0;
 546         }
 547
 548         fw1_skip = find_contig_space(fw1_start_block, fw_num_blocks,
 549                                 max_len1 / mtd->erasesize);
 550         if (fw1_skip < 0) {
 551                 printf("Could not find %lu contiguous good blocks for fw image\n",
 552                         fw_num_blocks);
 553                 if (uboot_part) {
 554 #ifdef CONFIG_ENV_IS_IN_NAND
 555                         if (part_info->offset <= CONFIG_ENV_OFFSET + TOTAL_ENV_SIZE) {
 556                                 printf("Use a different partition\n");
 557                         } else {
 558                                 printf("Increase the size of the '%s' partition\n",
 559                                         uboot_part);
 560                         }
 561 #else
 562                         printf("Increase the size of the '%s' partition\n",
 563                                 uboot_part);
 564 #endif
 565                 } else {
 566                         printf("Increase the number of spare blocks to use with the '-e' option\n");
 567                 }
 568                 return -ENOSPC;
 569         }
 570         fw1_end_block = fw1_start_block + fw1_skip + fw_num_blocks - 1;
 571
 572         if (fw2_set && fw2_start_block == 0)
 573                 fw2_start_block = fw1_end_block + 1;
 574         if (fw2_start_block > 0) {
 575                 fw2_skip = find_contig_space(fw2_start_block, fw_num_blocks,
 576                                         max_len2 / mtd->erasesize);
 577                 if (fw2_skip < 0) {
 578                         printf("Could not find %lu contiguous good blocks for redundant fw image\n",
 579                                 fw_num_blocks);
 580                         if (redund_part) {
 581                                 printf("Increase the size of the '%s' partition or use a different partition\n",
 582                                         redund_part);
 583                         } else {
 584                                 printf("Increase the number of spare blocks to use with the '-e' option\n");
 585                         }
 586                         return -ENOSPC;
 587                 }
 588         } else {
 589                 fw2_skip = 0;
 590         }
 591         fw2_end_block = fw2_start_block + fw2_skip + fw_num_blocks - 1;
 592
 593 #ifdef CONFIG_ENV_IS_IN_NAND
 594         fail_if_overlap(fcb, env, "FCB", "Environment");
 595         fail_if_overlap(fw1, env, "FW1", "Environment");
 596 #endif
 597         fail_if_overlap(fcb, fw1, "FCB", "FW1");
 598         if (fw2_set) {
 599                 fail_if_overlap(fcb, fw2, "FCB", "FW2");
 600 #ifdef CONFIG_ENV_IS_IN_NAND
 601                 fail_if_overlap(fw2, env, "FW2", "Environment");
 602 #endif
 603                 fail_if_overlap(fw1, fw2, "FW1", "FW2");
 604         }
 605
 606         buf = malloc(erase_size);
 607         if (buf == NULL) {
 608                 printf("Failed to allocate buffer\n");
 609                 return -ENOMEM;
 610         }
 611
 612         fcb = create_fcb(buf, fw1_start_block + fw1_skip,
 613                         fw2_start_block + fw2_skip, fw_num_blocks);
 614         if (IS_ERR(fcb)) {
 615                 printf("Failed to initialize FCB: %ld\n", PTR_ERR(fcb));
 616                 free(buf);
 617                 return PTR_ERR(fcb);
 618         }
 619         encode_hamming_13_8(fcb, (void *)fcb + 512, 512);
 620
 621         ret = write_fcb(buf, fcb_start_block);
 622         free(buf);
 623         if (ret) {
 624                 printf("Failed to write FCB to block %lu\n", fcb_start_block);
 625                 return ret;
 626         }
 627
 628         if (size & (page_size - 1)) {
 629                 memset(addr + size, 0xff, size & (page_size - 1));
 630                 size = ALIGN(size, page_size);
 631         }
 632
 633         printf("Programming U-Boot image from %p to block %lu @ %08llx\n",
 634                 addr, fw1_start_block + fw1_skip,
 635                 (u64)(fw1_start_block + fw1_skip) * mtd->erasesize);
 636         ret = tx28_prog_uboot(addr, fw1_start_block, fw1_skip, size,
 637                         max_len1);
 638
 639         if (fw2_start_block == 0) {
 640                 return ret;
 641         }
 642
 643         printf("Programming redundant U-Boot image to block %lu @ %08llx\n",
 644                 fw2_start_block + fw2_skip,
 645                 (u64)(fw2_start_block + fw2_skip) * mtd->erasesize);
 646         ret = tx28_prog_uboot(addr, fw2_start_block, fw2_skip, fw_num_blocks,
 647                         max_len2);
 648         return ret;
 649 }
 650
 651 U_BOOT_CMD(romupdate, 11, 0, do_update,
 652         "Creates an FCB data structure and writes an U-Boot image to flash",
 653         "[-f {<part>|block#}] [-r [{<part>|block#}]] [-e #] [<address>] [<length>]\n"
 654         "\t-f <part>\twrite bootloader image to partition <part>\n"
 655         "\t-f #\twrite bootloader image at block # (decimal)\n"
 656         "\t-r\twrite redundant bootloader image at next free block after first image\n"
 657         "\t-r <part>\twrite redundant bootloader image to partition <part>\n"
 658         "\t-r #\twrite redundant bootloader image at block # (decimal)\n"
 659         "\t-e #\tspecify number of redundant blocks per boot loader image\n"
 660         "\t\tonly valid if -f or -r specify a flash address rather than a partition name\n"
 661         "\t<address>\tRAM address of bootloader image (default: ${fileaddr}\n"
 662         "\t<length>\tlength of bootloader image in RAM (default: ${filesize}"
 663         );