board/karo/tx53/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 struct mx53_fcb {
  27         u32 rsrvd0;
  28         u32 fingerprint;
  29         u32 version;
  30         u32 rsrvd1[23];
  31         u32 fw1_start_page;
  32         u32 fw2_start_page;
  33         u32 rsrvd2[2];
  34         u32 dbbt_search_area;
  35         u32 bb_mark_phys_offset;
  36         u32 rsrvd3[11];
  37         u32 bb_swap;
  38         u32 bb_mark_byte;
  39         u32 rsrvd4[83];
  40 };
  41
  42 static nand_info_t *mtd = &nand_info[0];
  43 static bool doit;
  44
  45 static inline int calc_bb_offset(struct mx53_fcb *fcb)
  46 {
  47         int ecc_block_size = 512;
  48         int ecc_size = mtd->oobsize / (mtd->writesize / ecc_block_size);
  49         int bb_mark_chunk, bb_mark_chunk_offs;
  50
  51         bb_mark_chunk = mtd->writesize / (ecc_block_size + ecc_size);
  52         bb_mark_chunk_offs = mtd->writesize % (ecc_block_size + ecc_size);
  53         if (bb_mark_chunk_offs > ecc_block_size) {
  54                 printf("Unsupported ECC layout; BB mark resides in ECC data: %u\n",
  55                         bb_mark_chunk_offs);
  56                 return -EINVAL;
  57         }
  58         printf("BB mark is in block %d offset %d\n",
  59                 bb_mark_chunk, bb_mark_chunk_offs);
  60
  61         return bb_mark_chunk * ecc_block_size + bb_mark_chunk_offs;
  62 }
  63
  64 /*
  65  * return number of blocks to skip for a contiguous partition
  66  * of given # blocks
  67  */
  68 static int find_contig_space(int block, int num_blocks, int max_blocks)
  69 {
  70         int skip = 0;
  71         int found = 0;
  72         int last = block + max_blocks;
  73
  74         debug("Searching %u contiguous blocks from %d..%d\n",
  75                 num_blocks, block, block + max_blocks - 1);
  76         for (; block < last; block++) {
  77                 if (nand_block_isbad(mtd, block * mtd->erasesize)) {
  78                         skip += found + 1;
  79                         found = 0;
  80                         debug("Skipping %u blocks to %u\n",
  81                                 skip, block + 1);
  82                 } else {
  83                         found++;
  84                         if (found >= num_blocks) {
  85                                 debug("Found %u good blocks from %d..%d\n",
  86                                         found, block - found + 1, block);
  87                                 return skip;
  88                         }
  89                 }
  90         }
  91         return -ENOSPC;
  92 }
  93
  94 #define offset_of(p, m)         ((void *)&(p)->m - (void *)(p))
  95 #define pr_fcb_val(p, n)        debug("%-24s[%02x]=%08x(%d)\n", #n, offset_of(p, n), (p)->n, (p)->n)
  96
  97 static struct mx53_fcb *create_fcb(void *buf, int fw1_start_block,
  98                                 int fw2_start_block, int fw_num_blocks)
  99 {
 100         struct mx53_fcb *fcb;
 101         u32 sectors_per_block = mtd->erasesize / mtd->writesize;
 102
 103         fcb = buf;
 104
 105         memset(fcb, 0x00, sizeof(*fcb));
 106         memset(fcb + 1, 0xff, mtd->erasesize - sizeof(*fcb));
 107
 108         strncpy((char *)&fcb->fingerprint, "FCB ", 4);
 109         fcb->version = 1;
 110
 111         fcb->fw1_start_page = fw1_start_block * sectors_per_block;
 112         pr_fcb_val(fcb, fw1_start_page);
 113
 114         if (fw2_start_block != 0 && fw2_start_block < mtd->size / mtd->erasesize) {
 115                 fcb->fw2_start_page = fw2_start_block * sectors_per_block;
 116                 pr_fcb_val(fcb, fw2_start_page);
 117         }
 118
 119         return fcb;
 120 }
 121
 122 static int find_fcb(void *ref, int page)
 123 {
 124         int ret = 0;
 125         struct nand_chip *chip = mtd->priv;
 126         void *buf = malloc(mtd->erasesize);
 127
 128         if (buf == NULL) {
 129                 return -ENOMEM;
 130         }
 131         chip->select_chip(mtd, 0);
 132         chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
 133         ret = chip->ecc.read_page_raw(mtd, chip, buf, 1, page);
 134         if (ret) {
 135                 printf("Failed to read FCB from page %u: %d\n", page, ret);
 136                 goto out;
 137         }
 138         if (memcmp(buf, ref, mtd->writesize) == 0) {
 139                 debug("Found FCB in page %u (%08x)\n",
 140                         page, page * mtd->writesize);
 141                 ret = 1;
 142         }
 143 out:
 144         chip->select_chip(mtd, -1);
 145         free(buf);
 146         return ret;
 147 }
 148
 149 static int write_fcb(void *buf, int block)
 150 {
 151         int ret;
 152         struct nand_chip *chip = mtd->priv;
 153         int page = block * mtd->erasesize / mtd->writesize;
 154
 155         ret = find_fcb(buf, page);
 156         if (ret > 0) {
 157                 printf("FCB at block %d is up to date\n", block);
 158                 return 0;
 159         }
 160
 161         printf("Erasing FCB block %08x..%08x\n", block * mtd->erasesize,
 162                 block * mtd->erasesize + mtd->erasesize - 1);
 163         if (doit) {
 164                 ret = nand_erase(mtd, block * mtd->erasesize, mtd->erasesize);
 165                 if (ret) {
 166                         printf("Failed to erase FCB block %u\n", block);
 167                         return ret;
 168                 }
 169         }
 170
 171         printf("Writing FCB to block %d @ %08llx\n", block,
 172                 (u64)block * mtd->erasesize);
 173         if (doit) {
 174                 chip->select_chip(mtd, 0);
 175                 ret = chip->write_page(mtd, chip, buf, 1, page, 0, 1);
 176                 if (ret) {
 177                         printf("Failed to write FCB to block %u: %d\n", block, ret);
 178                 }
 179                 chip->select_chip(mtd, -1);
 180         }
 181         return ret;
 182 }
 183
 184 #define chk_overlap(a,b)                                \
 185         ((a##_start_block <= b##_end_block &&           \
 186                 a##_end_block >= b##_start_block) ||    \
 187         (b##_start_block <= a##_end_block &&            \
 188                 b##_end_block >= a##_start_block))
 189
 190 #define fail_if_overlap(a,b,m1,m2) do {                                 \
 191         if (!doit)                                                      \
 192                 printf("check: %s[%lu..%lu] <> %s[%lu..%lu]\n",         \
 193                         m1, a##_start_block, a##_end_block,             \
 194                         m2, b##_start_block, b##_end_block);            \
 195         if (a##_end_block < a##_start_block)                            \
 196                 printf("Invalid start/end block # for %s\n", m1);       \
 197         if (b##_end_block < b##_start_block)                            \
 198                 printf("Invalid start/end block # for %s\n", m2);       \
 199         if (chk_overlap(a, b)) {                                        \
 200                 printf("%s blocks %lu..%lu overlap %s in blocks %lu..%lu!\n", \
 201                         m1, a##_start_block, a##_end_block,             \
 202                         m2, b##_start_block, b##_end_block);            \
 203                 return -EINVAL;                                         \
 204         }                                                               \
 205 } while (0)
 206
 207 static int tx53_prog_uboot(void *addr, int start_block, int skip,
 208                         size_t size, size_t max_len)
 209 {
 210         int ret;
 211         nand_erase_options_t erase_opts = { 0, };
 212         size_t actual;
 213         size_t prg_length = max_len - skip * mtd->erasesize;
 214         int prg_start = start_block * mtd->erasesize;
 215
 216         erase_opts.offset = (start_block - skip) * mtd->erasesize;
 217         erase_opts.length = max_len;
 218         erase_opts.quiet = 1;
 219
 220         printf("Erasing flash @ %08llx..%08llx\n", erase_opts.offset,
 221                 erase_opts.offset + erase_opts.length - 1);
 222         if (doit) {
 223                 ret = nand_erase_opts(mtd, &erase_opts);
 224                 if (ret) {
 225                         printf("Failed to erase flash: %d\n", ret);
 226                         return ret;
 227                 }
 228         }
 229
 230         printf("Programming flash @ %08x..%08x from %p\n",
 231                 prg_start, prg_start + size - 1, addr);
 232         if (doit) {
 233                 actual = size;
 234                 ret = nand_write_skip_bad(mtd, prg_start, &actual, NULL,
 235                                         prg_length, addr, WITH_DROP_FFS);
 236                 if (ret) {
 237                         printf("Failed to program flash: %d\n", ret);
 238                         return ret;
 239                 }
 240                 if (actual < size) {
 241                         printf("Could only write %u of %u bytes\n", actual, size);
 242                         return -EIO;
 243                 }
 244         }
 245         return 0;
 246 }
 247
 248 #ifdef CONFIG_ENV_IS_IN_NAND
 249 #ifndef CONFIG_ENV_OFFSET_REDUND
 250 #define TOTAL_ENV_SIZE CONFIG_ENV_RANGE
 251 #else
 252 #define TOTAL_ENV_SIZE (CONFIG_ENV_RANGE * 2)
 253 #endif
 254 #endif
 255
 256 int do_update(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 257 {
 258         int ret;
 259         const unsigned long fcb_start_block = 0, fcb_end_block = 0;
 260         int erase_size = mtd->erasesize;
 261         int page_size = mtd->writesize;
 262         void *buf;
 263         char *load_addr;
 264         char *file_size;
 265         size_t size = 0;
 266         void *addr = NULL;
 267         struct mx53_fcb *fcb;
 268         unsigned long mtd_num_blocks = mtd->size / mtd->erasesize;
 269 #ifdef CONFIG_ENV_IS_IN_NAND
 270         unsigned long env_start_block = CONFIG_ENV_OFFSET / mtd->erasesize;
 271         unsigned long env_end_block = env_start_block +
 272                 DIV_ROUND_UP(TOTAL_ENV_SIZE, mtd->erasesize) - 1;
 273 #endif
 274         int optind;
 275         int fw2_set = 0;
 276         unsigned long fw1_start_block = 0, fw1_end_block;
 277         unsigned long fw2_start_block = 0, fw2_end_block;
 278         unsigned long fw_num_blocks;
 279         int fw1_skip, fw2_skip;
 280         unsigned long extra_blocks = 0;
 281         size_t max_len1, max_len2;
 282         struct mtd_device *dev;
 283         struct part_info *part_info;
 284         struct part_info *redund_part_info;
 285         const char *uboot_part = "u-boot";
 286         const char *redund_part = NULL;
 287         u8 part_num;
 288         u8 redund_part_num;
 289
 290         ret = mtdparts_init();
 291         if (ret)
 292                 return ret;
 293
 294         doit = true;
 295         for (optind = 1; optind < argc; optind++) {
 296                 char *endp;
 297
 298                 if (strcmp(argv[optind], "-f") == 0) {
 299                         if (optind >= argc - 1) {
 300                                 printf("Option %s requires an argument\n",
 301                                         argv[optind]);
 302                                 return -EINVAL;
 303                         }
 304                         optind++;
 305                         fw1_start_block = simple_strtoul(argv[optind], &endp, 0);
 306                         if (*endp != '\0') {
 307                                 uboot_part = argv[optind];
 308                                 continue;
 309                         }
 310                         uboot_part = NULL;
 311                         if (fw1_start_block >= mtd_num_blocks) {
 312                                 printf("Block number %lu is out of range: 0..%lu\n",
 313                                         fw1_start_block, mtd_num_blocks - 1);
 314                                 return -EINVAL;
 315                         }
 316                 } else if (strcmp(argv[optind], "-r") == 0) {
 317                         fw2_set = 1;
 318                         if (optind < argc - 1 && argv[optind + 1][0] != '-') {
 319                                 optind++;
 320                                 fw2_start_block = simple_strtoul(argv[optind],
 321                                                                 &endp, 0);
 322                                 if (*endp != '\0') {
 323                                         redund_part = argv[optind];
 324                                         continue;
 325                                 }
 326                                 if (fw2_start_block >= mtd_num_blocks) {
 327                                         printf("Block number %lu is out of range: 0..%lu\n",
 328                                                 fw2_start_block,
 329                                                 mtd_num_blocks - 1);
 330                                         return -EINVAL;
 331                                 }
 332                         }
 333                 } else if (strcmp(argv[optind], "-e") == 0) {
 334                         if (optind >= argc - 1) {
 335                                 printf("Option %s requires an argument\n",
 336                                         argv[optind]);
 337                                 return -EINVAL;
 338                         }
 339                         optind++;
 340                         extra_blocks = simple_strtoul(argv[optind], NULL, 0);
 341                         if (extra_blocks >= mtd_num_blocks) {
 342                                 printf("Extra block count %lu is out of range: 0..%lu\n",
 343                                         extra_blocks,
 344                                         mtd_num_blocks - 1);
 345                                 return -EINVAL;
 346                         }
 347                 } else if (strcmp(argv[optind], "-n") == 0) {
 348                         doit = false;
 349                 } else if (argv[optind][0] == '-') {
 350                         printf("Unrecognized option %s\n", argv[optind]);
 351                         return -EINVAL;
 352                 } else {
 353                         break;
 354                 }
 355         }
 356
 357         load_addr = getenv("fileaddr");
 358         file_size = getenv("filesize");
 359
 360         if (argc - optind < 1 && load_addr == NULL) {
 361                 printf("Load address not specified\n");
 362                 return -EINVAL;
 363         }
 364         if (argc - optind < 2 && file_size == NULL) {
 365                 if (uboot_part) {
 366                         printf("WARNING: Image size not specified; overwriting whole '%s' partition\n",
 367                                 uboot_part);
 368                         printf("This will only work, if there are no bad blocks inside this partition!\n");
 369                 } else {
 370                         printf("ERROR: Image size must be specified\n");
 371                         return -EINVAL;
 372                 }
 373         }
 374         if (argc > optind) {
 375                 load_addr = NULL;
 376                 addr = (void *)simple_strtoul(argv[optind], NULL, 16);
 377                 optind++;
 378         }
 379         if (argc > optind) {
 380                 file_size = NULL;
 381                 size = simple_strtoul(argv[optind], NULL, 16);
 382                 optind++;
 383         }
 384         if (load_addr != NULL) {
 385                 addr = (void *)simple_strtoul(load_addr, NULL, 16);
 386                 printf("Using default load address %p\n", addr);
 387         }
 388         if (file_size != NULL) {
 389                 size = simple_strtoul(file_size, NULL, 16);
 390                 printf("Using default file size %08x\n", size);
 391         }
 392         if (size > 0)
 393                 fw_num_blocks = DIV_ROUND_UP(size, mtd->erasesize);
 394         else
 395                 fw_num_blocks = 0;
 396
 397         if (uboot_part) {
 398                 ret = find_dev_and_part(uboot_part, &dev, &part_num,
 399                                         &part_info);
 400                 if (ret) {
 401                         printf("Failed to find '%s' partition: %d\n",
 402                                 uboot_part, ret);
 403                         return ret;
 404                 }
 405                 fw1_start_block = part_info->offset / mtd->erasesize;
 406                 max_len1 = part_info->size;
 407                 /*
 408                  * Skip one block, if the U-Boot image resides in the
 409                  * same partition as the FCB
 410                  */
 411                 if (fw1_start_block == fcb_start_block) {
 412                         fw1_start_block++;
 413                         max_len1 -= mtd->erasesize;
 414                 }
 415                 if (size == 0)
 416                         fw_num_blocks = max_len1 / mtd->erasesize;
 417         } else {
 418                 max_len1 = (fw_num_blocks + extra_blocks) * mtd->erasesize;
 419         }
 420
 421         if (redund_part) {
 422                 ret = find_dev_and_part(redund_part, &dev, &redund_part_num,
 423                                         &redund_part_info);
 424                 if (ret) {
 425                         printf("Failed to find '%s' partition: %d\n",
 426                                 redund_part, ret);
 427                         return ret;
 428                 }
 429                 fw2_start_block = redund_part_info->offset / mtd->erasesize;
 430                 max_len2 = redund_part_info->size;
 431                 if (fw2_start_block == fcb_start_block) {
 432                         fw2_start_block++;
 433                         max_len2 -= mtd->erasesize;
 434                 }
 435                 if (size == 0)
 436                         fw_num_blocks = max_len2 / mtd->erasesize;
 437         } else if (fw2_set) {
 438                 max_len2 = (fw_num_blocks + extra_blocks) * mtd->erasesize;
 439         } else {
 440                 max_len2 = 0;
 441         }
 442
 443         fw1_skip = find_contig_space(fw1_start_block, fw_num_blocks,
 444                                 max_len1 / mtd->erasesize);
 445         if (fw1_skip < 0) {
 446                 printf("Could not find %lu contiguous good blocks for fw image in blocks %lu..%lu\n",
 447                         fw_num_blocks, fw1_start_block,
 448                         fw1_start_block + max_len1 / mtd->erasesize - 1);
 449                 if (uboot_part) {
 450 #ifdef CONFIG_ENV_IS_IN_NAND
 451                         if (part_info->offset <= CONFIG_ENV_OFFSET + TOTAL_ENV_SIZE) {
 452                                 printf("Use a different partition\n");
 453                         } else {
 454                                 printf("Increase the size of the '%s' partition\n",
 455                                         uboot_part);
 456                         }
 457 #else
 458                         printf("Increase the size of the '%s' partition\n",
 459                                 uboot_part);
 460 #endif
 461                 } else {
 462                         printf("Increase the number of spare blocks to use with the '-e' option\n");
 463                 }
 464                 return -ENOSPC;
 465         }
 466         if (extra_blocks)
 467                 fw1_end_block = fw1_start_block + fw_num_blocks + extra_blocks - 1;
 468         else
 469                 fw1_end_block = fw1_start_block + fw_num_blocks + fw1_skip - 1;
 470
 471         if (fw2_set && fw2_start_block == 0)
 472                 fw2_start_block = fw1_end_block + 1;
 473         if (fw2_start_block > 0) {
 474                 fw2_skip = find_contig_space(fw2_start_block, fw_num_blocks,
 475                                         max_len2 / mtd->erasesize);
 476                 if (fw2_skip < 0) {
 477                         printf("Could not find %lu contiguous good blocks for redundant fw image in blocks %lu..%lu\n",
 478                                 fw_num_blocks, fw2_start_block,
 479                                 fw2_start_block + max_len2 / mtd->erasesize - 1);
 480                         if (redund_part) {
 481                                 printf("Increase the size of the '%s' partition or use a different partition\n",
 482                                         redund_part);
 483                         } else {
 484                                 printf("Increase the number of spare blocks to use with the '-e' option\n");
 485                         }
 486                         return -ENOSPC;
 487                 }
 488         } else {
 489                 fw2_skip = 0;
 490         }
 491         if (extra_blocks)
 492                 fw2_end_block = fw2_start_block + fw_num_blocks + extra_blocks - 1;
 493         else
 494                 fw2_end_block = fw2_start_block + fw_num_blocks + fw2_skip - 1;
 495
 496 #ifdef CONFIG_ENV_IS_IN_NAND
 497         fail_if_overlap(fcb, env, "FCB", "Environment");
 498         fail_if_overlap(fw1, env, "FW1", "Environment");
 499 #endif
 500         fail_if_overlap(fw1, fcb, "FW1", "FCB");
 501         if (fw2_set) {
 502                 fail_if_overlap(fw2, fcb, "FW2", "FCB");
 503 #ifdef CONFIG_ENV_IS_IN_NAND
 504                 fail_if_overlap(fw2, env, "FW2", "Environment");
 505 #endif
 506                 fail_if_overlap(fw1, fw2, "FW1", "FW2");
 507         }
 508         fw1_start_block += fw1_skip;
 509         fw2_start_block += fw2_skip;
 510
 511         buf = malloc(erase_size);
 512         if (buf == NULL) {
 513                 printf("Failed to allocate buffer\n");
 514                 return -ENOMEM;
 515         }
 516
 517         fcb = create_fcb(buf, fw1_start_block,
 518                         fw2_start_block, fw_num_blocks);
 519         if (IS_ERR(fcb)) {
 520                 printf("Failed to initialize FCB: %ld\n", PTR_ERR(fcb));
 521                 free(buf);
 522                 return PTR_ERR(fcb);
 523         }
 524
 525         ret = write_fcb(buf, fcb_start_block);
 526         free(buf);
 527         if (ret) {
 528                 printf("Failed to write FCB to block %lu\n", fcb_start_block);
 529                 return ret;
 530         }
 531
 532         if (size & (page_size - 1)) {
 533                 memset(addr + size, 0xff, size & (page_size - 1));
 534                 size = ALIGN(size, page_size);
 535         }
 536
 537         printf("Programming U-Boot image from %p to block %lu @ %08llx\n",
 538                 addr, fw1_start_block, (u64)fw1_start_block * mtd->erasesize);
 539         ret = tx53_prog_uboot(addr, fw1_start_block, fw1_skip, size,
 540                         max_len1);
 541         if (ret || fw2_start_block == 0)
 542                 return ret;
 543
 544         printf("Programming redundant U-Boot image to block %lu @ %08llx\n",
 545                 fw2_start_block, (u64)fw2_start_block * mtd->erasesize);
 546         ret = tx53_prog_uboot(addr, fw2_start_block, fw2_skip, size,
 547                         max_len2);
 548         return ret;
 549 }
 550
 551 U_BOOT_CMD(romupdate, 11, 0, do_update,
 552         "Creates an FCB data structure and writes an U-Boot image to flash",
 553         "[-f {<part>|block#}] [-r [{<part>|block#}]] [-e #] [<address>] [<length>]\n"
 554         "\t-f <part>\twrite bootloader image to partition <part>\n"
 555         "\t-f #\t\twrite bootloader image at block # (decimal)\n"
 556         "\t-r\t\twrite redundant bootloader image at next free block after first image\n"
 557         "\t-r <part>\twrite redundant bootloader image to partition <part>\n"
 558         "\t-r #\t\twrite redundant bootloader image at block # (decimal)\n"
 559         "\t-e #\t\tspecify number of redundant blocks per boot loader image\n"
 560         "\t\t\t(only valid if -f or -r specify a flash address rather than a partition name)\n"
 561         "\t-n\t\tshow what would be done without actually updating the flash\n"
 562         "\t<address>\tRAM address of bootloader image (default: ${fileaddr})\n"
 563         "\t<length>\tlength of bootloader image in RAM (default: ${filesize})"
 564         );