board/karo/tx28/flash.c

   1 #include <common.h>
   2 #include <malloc.h>
   3 #include <nand.h>
   4 #include <errno.h>
   5
   6 #include <linux/err.h>
   7
   8 #include <asm/io.h>
   9 #include <asm/sizes.h>
  10 #include <asm/arch/regs-base.h>
  11 #include <asm/arch/regs-gpmi.h>
  12 #include <asm/arch/regs-bch.h>
  13
  14 #define FCB_START_BLOCK         0
  15 #define NUM_FCB_BLOCKS          1
  16 #define MAX_FCB_BLOCKS          32768
  17
  18 struct mx28_nand_timing {
  19         u8 data_setup;
  20         u8 data_hold;
  21         u8 address_setup;
  22         u8 dsample_time;
  23         u8 nand_timing_state;
  24         u8 tREA;
  25         u8 tRLOH;
  26         u8 tRHOH;
  27 };
  28
  29 struct mx28_fcb {
  30         u32 checksum;
  31         u32 fingerprint;
  32         u32 version;
  33         struct mx28_nand_timing timing;
  34         u32 page_data_size;
  35         u32 total_page_size;
  36         u32 sectors_per_block;
  37         u32 number_of_nands;    /* not used by ROM code */
  38         u32 total_internal_die; /* not used by ROM code */
  39         u32 cell_type;          /* not used by ROM code */
  40         u32 ecc_blockn_type;
  41         u32 ecc_block0_size;
  42         u32 ecc_blockn_size;
  43         u32 ecc_block0_type;
  44         u32 metadata_size;
  45         u32 ecc_blocks_per_page;
  46         u32 rsrvd[6];            /* not used by ROM code */
  47         u32 bch_mode;
  48         u32 boot_patch;
  49         u32 patch_sectors;
  50         u32 fw1_start_page;
  51         u32 fw2_start_page;
  52         u32 fw1_sectors;
  53         u32 fw2_sectors;
  54         u32 dbbt_search_area;
  55         u32 bb_mark_byte;
  56         u32 bb_mark_startbit;
  57         u32 bb_mark_phys_offset;
  58 };
  59
  60 struct mx28_dbbt_header {
  61         u32 checksum;
  62         u32 fingerprint;
  63         u32 version;
  64         u32 number_bb;
  65         u32 number_pages;
  66         u8 spare[492];
  67 };
  68
  69 struct mx28_dbbt {
  70         u32 nand_number;
  71         u32 number_bb;
  72         u32 bb_num[2040 / 4];
  73 };
  74
  75 #define BF_VAL(v, bf)           (((v) & bf##_MASK) >> bf##_OFFSET)
  76
  77 static nand_info_t *mtd = &nand_info[0];
  78
  79 extern void *_start;
  80
  81 #define BIT(v,n)        (((v) >> (n)) & 0x1)
  82
  83 static u8 calculate_parity_13_8(u8 d)
  84 {
  85         u8 p = 0;
  86
  87         p |= (BIT(d, 6) ^ BIT(d, 5) ^ BIT(d, 3) ^ BIT(d, 2))             << 0;
  88         p |= (BIT(d, 7) ^ BIT(d, 5) ^ BIT(d, 4) ^ BIT(d, 2) ^ BIT(d, 1)) << 1;
  89         p |= (BIT(d, 7) ^ BIT(d, 6) ^ BIT(d, 5) ^ BIT(d, 1) ^ BIT(d, 0)) << 2;
  90         p |= (BIT(d, 7) ^ BIT(d, 4) ^ BIT(d, 3) ^ BIT(d, 0))             << 3;
  91         p |= (BIT(d, 6) ^ BIT(d, 4) ^ BIT(d, 3) ^ BIT(d, 2) ^ BIT(d, 1) ^ BIT(d, 0)) << 4;
  92         return p;
  93 }
  94
  95 static void encode_hamming_13_8(void *_src, void *_ecc, size_t size)
  96 {
  97         int i;
  98         u8 *src = _src;
  99         u8 *ecc = _ecc;
 100
 101         for (i = 0; i < size; i++)
 102                 ecc[i] = calculate_parity_13_8(src[i]);
 103 }
 104
 105 static u32 calc_chksum(void *buf, size_t size)
 106 {
 107         u32 chksum = 0;
 108         u8 *bp = buf;
 109         size_t i;
 110
 111         for (i = 0; i < size; i++) {
 112                 chksum += bp[i];
 113         }
 114         return ~chksum;
 115 }
 116
 117 /*
 118   Physical organisation of data in NAND flash:
 119   metadata
 120   payload chunk 0 (may be empty)
 121   ecc for metadata + payload chunk 0
 122   payload chunk 1
 123   ecc for payload chunk 1
 124 ...
 125   payload chunk n
 126   ecc for payload chunk n
 127  */
 128
 129 static int calc_bb_offset(nand_info_t *mtd, struct mx28_fcb *fcb)
 130 {
 131         int bb_mark_offset;
 132         int chunk_data_size = fcb->ecc_blockn_size * 8;
 133         int chunk_ecc_size = (fcb->ecc_blockn_type << 1) * 13;
 134         int chunk_total_size = chunk_data_size + chunk_ecc_size;
 135         int bb_mark_chunk, bb_mark_chunk_offs;
 136
 137         bb_mark_offset = (mtd->writesize - fcb->metadata_size) * 8;
 138         if (fcb->ecc_block0_size == 0)
 139                 bb_mark_offset -= (fcb->ecc_block0_type << 1) * 13;
 140
 141         bb_mark_chunk = bb_mark_offset / chunk_total_size;
 142         bb_mark_chunk_offs = bb_mark_offset - (bb_mark_chunk * chunk_total_size);
 143         if (bb_mark_chunk_offs > chunk_data_size) {
 144                 printf("Unsupported ECC layout; BB mark resides in ECC data: %u\n",
 145                         bb_mark_chunk_offs);
 146                 return -EINVAL;
 147         }
 148         bb_mark_offset -= bb_mark_chunk * chunk_ecc_size;
 149         return bb_mark_offset;
 150 }
 151
 152 static struct mx28_fcb *create_fcb(void *buf, int fw1_start_block,
 153                                 int fw2_start_block, size_t fw_size)
 154 {
 155         struct gpmi_regs *gpmi_base = (void *)GPMI_BASE_ADDRESS;
 156         struct bch_regs *bch_base = (void *)BCH_BASE_ADDRESS;
 157         u32 fl0, fl1;
 158         u32 t0, t1;
 159         int metadata_size;
 160         int bb_mark_bit_offs;
 161         struct mx28_fcb *fcb;
 162         int fcb_offs;
 163
 164         if (gpmi_base == NULL || bch_base == NULL) {
 165                 return ERR_PTR(-ENOMEM);
 166         }
 167
 168         fl0 = readl(&bch_base->hw_bch_flash0layout0);
 169         fl1 = readl(&bch_base->hw_bch_flash0layout1);
 170         t0 = readl(&gpmi_base->hw_gpmi_timing0);
 171         t1 = readl(&gpmi_base->hw_gpmi_timing1);
 172
 173         metadata_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_META_SIZE);
 174
 175         fcb = buf + ALIGN(metadata_size, 4);
 176         fcb_offs = (void *)fcb - buf;
 177
 178         memset(buf, 0xff, fcb_offs);
 179         memset(fcb, 0x00, sizeof(*fcb));
 180         memset(fcb + 1, 0xff, mtd->erasesize - fcb_offs - sizeof(*fcb));
 181
 182         strncpy((char *)&fcb->fingerprint, "FCB ", 4);
 183         fcb->version = cpu_to_be32(1);
 184
 185         fcb->timing.data_setup = BF_VAL(t0, GPMI_TIMING0_DATA_SETUP);
 186         fcb->timing.data_hold = BF_VAL(t0, GPMI_TIMING0_DATA_HOLD);
 187         fcb->timing.address_setup = BF_VAL(t0, GPMI_TIMING0_ADDRESS_SETUP);
 188
 189         fcb->page_data_size = mtd->writesize;
 190         fcb->total_page_size = mtd->writesize + mtd->oobsize;
 191         fcb->sectors_per_block = mtd->erasesize / mtd->writesize;
 192
 193         fcb->ecc_block0_type = BF_VAL(fl0, BCH_FLASHLAYOUT0_ECC0);
 194         fcb->ecc_block0_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_DATA0_SIZE);
 195         fcb->ecc_blockn_type = BF_VAL(fl1, BCH_FLASHLAYOUT1_ECCN);
 196         fcb->ecc_blockn_size = BF_VAL(fl1, BCH_FLASHLAYOUT1_DATAN_SIZE);
 197
 198         fcb->metadata_size = BF_VAL(fl0, BCH_FLASHLAYOUT0_META_SIZE);
 199         fcb->ecc_blocks_per_page = BF_VAL(fl0, BCH_FLASHLAYOUT0_NBLOCKS);
 200         fcb->bch_mode = readl(&bch_base->hw_bch_mode);
 201 /*
 202         fcb->boot_patch = 0;
 203         fcb->patch_sectors = 0;
 204 */
 205         fcb->fw1_start_page = fw1_start_block * mtd->erasesize / mtd->writesize;
 206         fcb->fw1_sectors = DIV_ROUND_UP(fw_size, mtd->writesize);
 207
 208         if (fw2_start_block != 0 && fw2_start_block < mtd->size / mtd->erasesize) {
 209                 fcb->fw2_start_page = fw2_start_block * mtd->erasesize / mtd->writesize;
 210                 fcb->fw2_sectors = fcb->fw1_sectors;
 211         }
 212
 213         fcb->dbbt_search_area = 1;
 214
 215         bb_mark_bit_offs = calc_bb_offset(mtd, fcb);
 216         if (bb_mark_bit_offs < 0)
 217                 return ERR_PTR(bb_mark_bit_offs);
 218         fcb->bb_mark_byte = bb_mark_bit_offs / 8;
 219         fcb->bb_mark_startbit = bb_mark_bit_offs % 8;
 220         fcb->bb_mark_phys_offset = mtd->writesize;
 221
 222         fcb->checksum = calc_chksum(&fcb->fingerprint, 512 - 4);
 223         return fcb;
 224 }
 225
 226 static int find_fcb(void *ref, int page)
 227 {
 228         int ret = 0;
 229         struct nand_chip *chip = mtd->priv;
 230         void *buf = malloc(mtd->erasesize);
 231
 232         if (buf == NULL) {
 233                 return -ENOMEM;
 234         }
 235         chip->select_chip(mtd, 0);
 236         chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
 237         ret = chip->ecc.read_page_raw(mtd, chip, buf, page);
 238         if (ret) {
 239                 printf("Failed to read FCB from page %u: %d\n", page, ret);
 240                 return ret;
 241         }
 242         chip->select_chip(mtd, -1);
 243         if (memcmp(buf, ref, mtd->writesize) == 0) {
 244                 printf("%s: Found FCB in page %u (%08x)\n", __func__,
 245                         page, page * mtd->writesize);
 246                 ret = 1;
 247         }
 248         free(buf);
 249         return ret;
 250 }
 251
 252 static int write_fcb(void *buf, int block)
 253 {
 254         int ret;
 255         struct nand_chip *chip = mtd->priv;
 256         int page = block * mtd->erasesize / mtd->writesize;
 257
 258         ret = find_fcb(buf, page);
 259         if (ret > 0) {
 260                 printf("FCB at block %d is up to date\n", block);
 261                 return 0;
 262         }
 263
 264         ret = nand_erase(mtd, block * mtd->erasesize, mtd->erasesize);
 265         if (ret) {
 266                 printf("Failed to erase FCB block %u\n", block);
 267                 return ret;
 268         }
 269
 270         printf("Writing FCB to block %d @ %08x\n", block,
 271                 block * mtd->erasesize);
 272         chip->select_chip(mtd, 0);
 273         ret = chip->write_page(mtd, chip, buf, page, 0, 1);
 274         if (ret) {
 275                 printf("Failed to write FCB to block %u: %d\n", block, ret);
 276         }
 277         chip->select_chip(mtd, -1);
 278         return ret;
 279 }
 280
 281 #define chk_overlap(a,b)                                \
 282         ((a##_start_block <= b##_end_block &&           \
 283                 a##_end_block >= b##_start_block) ||    \
 284         (b##_start_block <= a##_end_block &&            \
 285                 b##_end_block >= a##_start_block))
 286
 287 #define fail_if_overlap(a,b,m1,m2) do {                         \
 288         if (chk_overlap(a, b)) {                                \
 289                 printf("%s blocks %lu..%lu overlap %s in blocks %lu..%lu!\n", \
 290                         m1, a##_start_block, a##_end_block,     \
 291                         m2, b##_start_block, b##_end_block);    \
 292                 return -EINVAL;                                 \
 293         }                                                       \
 294 } while (0)
 295
 296 #ifndef CONFIG_ENV_OFFSET_REDUND
 297 #define TOTAL_ENV_SIZE CONFIG_ENV_SIZE
 298 #else
 299 #define TOTAL_ENV_SIZE (CONFIG_ENV_SIZE * 2)
 300 #endif
 301
 302 int do_update(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 303 {
 304         int ret;
 305         int block;
 306         int erase_size = mtd->erasesize;
 307         int page_size = mtd->writesize;
 308         void *buf;
 309         char *load_addr;
 310         char *file_size;
 311         size_t size = 0;
 312         void *addr = NULL;
 313         struct mx28_fcb *fcb;
 314         unsigned long fcb_start_block = FCB_START_BLOCK;
 315         unsigned long num_fcb_blocks = NUM_FCB_BLOCKS;
 316         unsigned long fcb_end_block;
 317         unsigned long mtd_num_blocks = mtd->size / mtd->erasesize;
 318         unsigned long env_start_block = CONFIG_ENV_OFFSET / mtd->erasesize;
 319         unsigned long env_end_block = env_start_block +
 320                 DIV_ROUND_UP(TOTAL_ENV_SIZE, mtd->erasesize) - 1;
 321         int optind;
 322         int fw1_set = 0;
 323         int fw2_set = 0;
 324         unsigned long fw1_start_block = 0, fw1_end_block;
 325         unsigned long fw2_start_block = 0, fw2_end_block;
 326         unsigned long fw_num_blocks;
 327         unsigned long extra_blocks = 2;
 328         nand_erase_options_t erase_opts = { 0, };
 329         int fcb_written = 0;
 330
 331         load_addr = getenv("fileaddr");
 332         file_size = getenv("filesize");
 333
 334         if (argc < 2 && load_addr == NULL) {
 335                 printf("Load address not specified\n");
 336                 return -EINVAL;
 337         }
 338         if (argc < 3 && file_size == NULL) {
 339                 printf("Image size not specified\n");
 340                 return -EINVAL;
 341         }
 342
 343         for (optind = 1; optind < argc; optind++) {
 344                 if (strcmp(argv[optind], "-b") == 0) {
 345                         if (optind >= argc - 1) {
 346                                 printf("Option %s requires an argument\n", argv[optind]);
 347                                 return -EINVAL;
 348                         }
 349                         optind++;
 350                         fcb_start_block = simple_strtoul(argv[optind], NULL, 0);
 351                         if (fcb_start_block >= mtd_num_blocks) {
 352                                 printf("Block number %lu is out of range: 0..%lu\n",
 353                                         fcb_start_block, mtd_num_blocks - 1);
 354                                 return -EINVAL;
 355                         }
 356                 } else if (strcmp(argv[optind], "-n") == 0) {
 357                         if (optind >= argc - 1) {
 358                                 printf("Option %s requires an argument\n", argv[optind]);
 359                                 return -EINVAL;
 360                         }
 361                         optind++;
 362                         num_fcb_blocks = simple_strtoul(argv[optind], NULL, 0);
 363                         if (num_fcb_blocks > MAX_FCB_BLOCKS) {
 364                                 printf("Extraneous number of FCB blocks; max. allowed: %u\n",
 365                                         MAX_FCB_BLOCKS);
 366                                 return -EINVAL;
 367                         }
 368                 } else if (strcmp(argv[optind], "-f") == 0) {
 369                         if (optind >= argc - 1) {
 370                                 printf("Option %s requires an argument\n", argv[optind]);
 371                                 return -EINVAL;
 372                         }
 373                         optind++;
 374                         fw1_start_block = simple_strtoul(argv[optind], NULL, 0);
 375                         if (fw1_start_block >= mtd_num_blocks) {
 376                                 printf("Block number %lu is out of range: 0..%lu\n",
 377                                         fw1_start_block,
 378                                         mtd_num_blocks - 1);
 379                                 return -EINVAL;
 380                         }
 381                         fw1_set = 1;
 382                 } else if (strcmp(argv[optind], "-r") == 0) {
 383                         if (optind < argc - 1 && argv[optind + 1][0] != '-') {
 384                                 optind++;
 385                                 fw2_start_block = simple_strtoul(argv[optind], NULL, 0);
 386                                 if (fw2_start_block >= mtd_num_blocks) {
 387                                         printf("Block number %lu is out of range: 0..%lu\n",
 388                                                 fw2_start_block,
 389                                                 mtd_num_blocks - 1);
 390                                         return -EINVAL;
 391                                 }
 392                         }
 393                         fw2_set = 1;
 394                 } else if (strcmp(argv[optind], "-e") == 0) {
 395                         if (optind >= argc - 1) {
 396                                 printf("Option %s requires an argument\n", argv[optind]);
 397                                 return -EINVAL;
 398                         }
 399                         optind++;
 400                         extra_blocks = simple_strtoul(argv[optind], NULL, 0);
 401                         if (extra_blocks >= mtd_num_blocks) {
 402                                 printf("Extra block count %lu is out of range: 0..%lu\n",
 403                                         extra_blocks,
 404                                         mtd_num_blocks - 1);
 405                                 return -EINVAL;
 406                         }
 407                 } else if (argv[optind][0] == '-') {
 408                         printf("Unrecognized option %s\n", argv[optind]);
 409                         return -EINVAL;
 410                 }
 411         }
 412         if (argc > optind) {
 413                 load_addr = NULL;
 414                 addr = (void *)simple_strtoul(argv[optind], NULL, 0);
 415                 optind++;
 416         }
 417         if (argc > optind) {
 418                 file_size = NULL;
 419                 size = simple_strtoul(argv[optind], NULL, 0);
 420                 optind++;
 421         }
 422         if (load_addr != NULL) {
 423                 addr = (void *)simple_strtoul(load_addr, NULL, 16);
 424                 printf("Using default load address %p\n", addr);
 425         }
 426         if (file_size != NULL) {
 427                 size = simple_strtoul(file_size, NULL, 16);
 428                 printf("Using default file size %08x\n", size);
 429         }
 430         fcb_end_block = fcb_start_block + num_fcb_blocks - 1;
 431         fw_num_blocks = DIV_ROUND_UP(size, mtd->erasesize);
 432
 433         if (!fw1_set) {
 434                 fw1_start_block = fcb_end_block + 1;
 435                 fw1_end_block = fw1_start_block + fw_num_blocks + extra_blocks - 1;
 436                 if (chk_overlap(fw1, env)) {
 437                         fw1_start_block = env_end_block + 1;
 438                         fw1_end_block = fw1_start_block + fw_num_blocks + extra_blocks - 1;
 439                 }
 440         } else {
 441                 fw1_end_block = fw1_start_block + fw_num_blocks + extra_blocks - 1;
 442         }
 443
 444         if (fw2_set && fw2_start_block == 0) {
 445                 fw2_start_block = fw1_end_block + 1;
 446                 fw2_end_block = fw2_start_block + fw_num_blocks + extra_blocks - 1;
 447                 if (chk_overlap(fw2, env)) {
 448                         fw2_start_block = env_end_block + 1;
 449                         fw2_end_block = fw2_start_block + fw_num_blocks + extra_blocks - 1;
 450                 }
 451         } else {
 452                 fw2_end_block = fw2_start_block + fw_num_blocks + extra_blocks - 1;
 453         }
 454
 455         fail_if_overlap(fcb, env, "FCB", "Environment");
 456         fail_if_overlap(fcb, fw1, "FCB", "FW1");
 457         fail_if_overlap(fw1, env, "FW1", "Environment");
 458         if (fw2_set) {
 459                 fail_if_overlap(fcb, fw2, "FCB", "FW2");
 460                 fail_if_overlap(fw2, env, "FW2", "Environment");
 461                 fail_if_overlap(fw1, fw2, "FW1", "FW2");
 462         }
 463
 464         buf = malloc(erase_size);
 465         if (buf == NULL) {
 466                 printf("Failed to allocate buffer\n");
 467                 return -ENOMEM;
 468         }
 469         /* search for first non-bad block in FW1 block range */
 470         while (fw1_start_block <= fw1_end_block) {
 471                 if (!nand_block_isbad(mtd, fw1_start_block * mtd->erasesize))
 472                         break;
 473                 fw1_start_block++;
 474         }
 475         if (fw1_end_block - fw1_start_block + 1 < fw_num_blocks) {
 476                 printf("Too many bad blocks in FW1 block range: %lu..%lu\n",
 477                         fw1_end_block + 1 - fw_num_blocks - extra_blocks,
 478                         fw1_end_block);
 479                 return -EINVAL;
 480         }
 481
 482         /* search for first non-bad block in FW2 block range */
 483         while (fw2_set && fw2_start_block <= fw2_end_block) {
 484                 if (!nand_block_isbad(mtd, fw2_start_block * mtd->erasesize))
 485                         break;
 486                 fw2_start_block++;
 487         }
 488         if (fw2_end_block - fw2_start_block + 1 < fw_num_blocks) {
 489                 printf("Too many bad blocks in FW2 area %08lx..%08lx\n",
 490                         fw2_end_block + 1 - fw_num_blocks - extra_blocks,
 491                         fw2_end_block);
 492                 return -EINVAL;
 493         }
 494
 495         fcb = create_fcb(buf, fw1_start_block, fw2_start_block,
 496                         (fw_num_blocks + extra_blocks) * mtd->erasesize);
 497         if (IS_ERR(fcb)) {
 498                 printf("Failed to initialize FCB: %ld\n", PTR_ERR(fcb));
 499                 return PTR_ERR(fcb);
 500         }
 501         encode_hamming_13_8(fcb, (void *)fcb + 512, 512);
 502
 503         for (block = fcb_start_block; block < fcb_start_block + num_fcb_blocks;
 504              block++) {
 505                 if (nand_block_isbad(mtd, block * mtd->erasesize)) {
 506                         if (block == fcb_start_block)
 507                                 fcb_start_block++;
 508                         continue;
 509                 }
 510                 ret = write_fcb(buf, block);
 511                 if (ret) {
 512                         printf("Failed to write FCB to block %u\n", block);
 513                         return ret;
 514                 }
 515                 fcb_written = 1;
 516         }
 517
 518         if (!fcb_written) {
 519                 printf("Could not write FCB to flash\n");
 520                 return -EIO;
 521         }
 522
 523         printf("Programming U-Boot image from %p to block %lu\n",
 524                 addr, fw1_start_block);
 525         if (size & (page_size - 1)) {
 526                 memset(addr + size, 0xff, size & (page_size - 1));
 527                 size = ALIGN(size, page_size);
 528         }
 529
 530         erase_opts.offset = fcb->fw1_start_page * page_size;
 531         erase_opts.length = ALIGN(size, erase_size) +
 532                 extra_blocks * mtd->erasesize;
 533         erase_opts.quiet = 1;
 534
 535         printf("Erasing flash @ %08llx..%08llx\n", erase_opts.offset,
 536                 erase_opts.offset + erase_opts.length - 1);
 537
 538         ret = nand_erase_opts(mtd, &erase_opts);
 539         if (ret) {
 540                 printf("Failed to erase flash: %d\n", ret);
 541                 return ret;
 542         }
 543         printf("Programming flash @ %08x..%08x from %p\n",
 544                 fcb->fw1_start_page * page_size,
 545                 fcb->fw1_start_page * page_size + size, addr);
 546         ret = nand_write_skip_bad(mtd, fcb->fw1_start_page * page_size,
 547                                 &size, addr, WITH_DROP_FFS);
 548         if (ret) {
 549                 printf("Failed to program flash: %d\n", ret);
 550                 return ret;
 551         }
 552         if (fw2_start_block == 0) {
 553                 return ret;
 554         }
 555
 556         printf("Programming redundant U-Boot image to block %lu\n",
 557                 fw2_start_block);
 558         erase_opts.offset = fcb->fw2_start_page * page_size;
 559         printf("Erasing flash @ %08llx..%08llx\n", erase_opts.offset,
 560                 erase_opts.offset + erase_opts.length - 1);
 561
 562         ret = nand_erase_opts(mtd, &erase_opts);
 563         if (ret) {
 564                 printf("Failed to erase flash: %d\n", ret);
 565                 return ret;
 566         }
 567         printf("Programming flash @ %08x..%08x from %p\n",
 568                 fcb->fw2_start_page * page_size,
 569                 fcb->fw2_start_page * page_size + size, addr);
 570         ret = nand_write_skip_bad(mtd, fcb->fw2_start_page * page_size,
 571                                 &size, addr, WITH_DROP_FFS);
 572         if (ret) {
 573                 printf("Failed to program flash: %d\n", ret);
 574                 return ret;
 575         }
 576         return ret;
 577 }
 578
 579 U_BOOT_CMD(romupdate, 11, 0, do_update,
 580         "Creates an FCB data structure and writes an U-Boot image to flash\n",
 581         "[-b #] [-n #] [-f #] [-r [#]] [<address>] [<length>]\n"
 582         "\t-b #\tfirst FCB block number (default 0)\n"
 583         "\t-n #\ttotal number of FCB blocks (default 1)\n"
 584         "\t-f #\twrite bootloader image at block #\n"
 585         "\t-r\twrite redundant bootloader image at next free block after first image\n"
 586         "\t-r #\twrite redundant bootloader image at block #\n"
 587         "\t-e #\tspecify number of redundant blocks per boot loader image\n"
 588         "\t<address>\tRAM address of bootloader image (default: ${fileaddr}\n"
 589         "\t<length>\tlength of bootloader image in RAM (default: ${filesize}"
 590         );