arch/arm/mach-imx/cmd_nandbcb.c

   1 /*
   2  * i.MX nand boot control block(bcb).
   3  *
   4  * Based on the common/imx-bbu-nand-fcb.c from barebox and imx kobs-ng
   5  *
   6  * Copyright (C) 2017 Jagan Teki <jagan@amarulasolutions.com>
   7  * Copyright (C) 2016 Sergey Kubushyn <ksi@koi8.net>
   8  *
   9  * Reconstucted by Han Xu <han.xu@nxp.com>
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <command.h>
  16 #include <log.h>
  17 #include <malloc.h>
  18 #include <nand.h>
  19 #include <dm/devres.h>
  20
  21 #include <asm/io.h>
  22 #include <jffs2/jffs2.h>
  23 #include <linux/bch.h>
  24 #include <linux/mtd/mtd.h>
  25
  26 #include <asm/arch/sys_proto.h>
  27 #include <asm/mach-imx/imx-nandbcb.h>
  28 #include <asm/mach-imx/imximage.cfg>
  29 #include <mxs_nand.h>
  30 #include <linux/mtd/mtd.h>
  31 #include <nand.h>
  32 #include <fuse.h>
  33
  34 #include "../../../cmd/legacy-mtd-utils.h"
  35
  36 /* FCB related flags */
  37 /* FCB layout with leading 12B reserved */
  38 #define FCB_LAYOUT_RESV_12B             BIT(0)
  39 /* FCB layout with leading 32B meta data */
  40 #define FCB_LAYOUT_META_32B             BIT(1)
  41 /* FCB encrypted by Hamming code */
  42 #define FCB_ENCODE_HAMMING              BIT(2)
  43 /* FCB encrypted by 40bit BCH */
  44 #define FCB_ENCODE_BCH_40b              BIT(3)
  45 /* FCB encrypted by 62bit BCH */
  46 #define FCB_ENCODE_BCH_62b              BIT(4)
  47 /* FCB encrypted by BCH */
  48 #define FCB_ENCODE_BCH                  (FCB_ENCODE_BCH_40b | FCB_ENCODE_BCH_62b)
  49 /* FCB data was randomized */
  50 #define FCB_RANDON_ENABLED              BIT(5)
  51
  52 /* Firmware related flags */
  53 /* No 1K padding */
  54 #define FIRMWARE_NEED_PADDING           BIT(8)
  55 /* Extra firmware*/
  56 #define FIRMWARE_EXTRA_ONE              BIT(9)
  57 /* Secondary firmware on fixed address */
  58 #define FIRMWARE_SECONDARY_FIXED_ADDR   BIT(10)
  59
  60 /* Boot search related flags */
  61 #define BT_SEARCH_CNT_FROM_FUSE         BIT(16)
  62
  63 struct platform_config {
  64         int misc_flags;
  65 };
  66
  67 static struct platform_config plat_config;
  68
  69 /* imx6q/dl/solo */
  70 static struct platform_config imx6qdl_plat_config = {
  71         .misc_flags = FCB_LAYOUT_RESV_12B |
  72                      FCB_ENCODE_HAMMING |
  73                      FIRMWARE_NEED_PADDING,
  74 };
  75
  76 static struct platform_config imx6sx_plat_config = {
  77         .misc_flags = FCB_LAYOUT_META_32B |
  78                      FCB_ENCODE_BCH_62b |
  79                      FIRMWARE_NEED_PADDING |
  80                      FCB_RANDON_ENABLED,
  81 };
  82
  83 static struct platform_config imx7d_plat_config = {
  84         .misc_flags = FCB_LAYOUT_META_32B |
  85                      FCB_ENCODE_BCH_62b |
  86                      FIRMWARE_NEED_PADDING |
  87                      FCB_RANDON_ENABLED,
  88 };
  89
  90 /* imx6ul/ull/ulz */
  91 static struct platform_config imx6ul_plat_config = {
  92         .misc_flags = FCB_LAYOUT_META_32B |
  93                      FCB_ENCODE_BCH_40b |
  94                      FIRMWARE_NEED_PADDING,
  95 };
  96
  97 static struct platform_config imx8mq_plat_config = {
  98         .misc_flags = FCB_LAYOUT_META_32B |
  99                      FCB_ENCODE_BCH_62b |
 100                      FIRMWARE_NEED_PADDING |
 101                      FCB_RANDON_ENABLED |
 102                      FIRMWARE_EXTRA_ONE,
 103 };
 104
 105 /* all other imx8mm */
 106 static struct platform_config imx8mm_plat_config = {
 107         .misc_flags = FCB_LAYOUT_META_32B |
 108                      FCB_ENCODE_BCH_62b |
 109                      FIRMWARE_NEED_PADDING |
 110                      FCB_RANDON_ENABLED,
 111 };
 112
 113 /* imx8mn */
 114 static struct platform_config imx8mn_plat_config = {
 115         .misc_flags = FCB_LAYOUT_META_32B |
 116                      FCB_ENCODE_BCH_62b |
 117                      FCB_RANDON_ENABLED |
 118                      FIRMWARE_SECONDARY_FIXED_ADDR |
 119                      BT_SEARCH_CNT_FROM_FUSE,
 120 };
 121
 122 /* imx8qx/qm */
 123 static struct platform_config imx8q_plat_config = {
 124         .misc_flags = FCB_LAYOUT_META_32B |
 125                      FCB_ENCODE_BCH_62b |
 126                      FCB_RANDON_ENABLED |
 127                      FIRMWARE_SECONDARY_FIXED_ADDR |
 128                      BT_SEARCH_CNT_FROM_FUSE,
 129 };
 130
 131 /* boot search related variables and definitions */
 132 static int g_boot_search_count = 4;
 133 static int g_boot_search_stride;
 134 static int g_pages_per_stride;
 135
 136 /* mtd config structure */
 137 struct boot_config {
 138         int dev;
 139         struct mtd_info *mtd;
 140         loff_t maxsize;
 141         loff_t input_size;
 142         loff_t offset;
 143         loff_t boot_stream1_address;
 144         loff_t boot_stream2_address;
 145         size_t boot_stream1_size;
 146         size_t boot_stream2_size;
 147         size_t max_boot_stream_size;
 148         int stride_size_in_byte;
 149         int search_area_size_in_bytes;
 150         int search_area_size_in_pages;
 151         int secondary_boot_stream_off_in_MB;
 152 };
 153
 154 /* boot_stream config structure */
 155 struct boot_stream_config {
 156         char bs_label[32];
 157         loff_t bs_addr;
 158         size_t bs_size;
 159         void *bs_buf;
 160         loff_t next_bs_addr;
 161         bool need_padding;
 162 };
 163
 164 /* FW index */
 165 #define FW1_ONLY        1
 166 #define FW2_ONLY        2
 167 #define FW_ALL          FW1_ONLY | FW2_ONLY
 168 #define FW_INX(x)       (1 << (x))
 169
 170 /* NAND convert macros */
 171 #define CONV_TO_PAGES(x)        ((u32)(x) / (u32)(mtd->writesize))
 172 #define CONV_TO_BLOCKS(x)       ((u32)(x) / (u32)(mtd->erasesize))
 173
 174 #define GETBIT(v, n)            (((v) >> (n)) & 0x1)
 175 #define IMX8MQ_SPL_SZ 0x3e000
 176 #define IMX8MQ_HDMI_FW_SZ 0x19c00
 177
 178 static int nandbcb_get_info(int argc, char * const argv[],
 179                             struct boot_config *boot_cfg)
 180 {
 181         int dev;
 182         struct mtd_info *mtd;
 183
 184         dev = nand_curr_device;
 185         if (dev < 0) {
 186                 printf("failed to get nand_curr_device, run nand device\n");
 187                 return CMD_RET_FAILURE;
 188         }
 189
 190         mtd = get_nand_dev_by_index(dev);
 191         if (!mtd) {
 192                 printf("failed to get mtd info\n");
 193                 return CMD_RET_FAILURE;
 194         }
 195
 196         boot_cfg->dev = dev;
 197         boot_cfg->mtd = mtd;
 198
 199         return CMD_RET_SUCCESS;
 200 }
 201
 202 static int nandbcb_get_size(int argc, char * const argv[], int num,
 203                             struct boot_config *boot_cfg)
 204 {
 205         int dev;
 206         loff_t offset, size, maxsize;
 207         struct mtd_info *mtd;
 208
 209         dev = boot_cfg->dev;
 210         mtd = boot_cfg->mtd;
 211         size = 0;
 212
 213         if (mtd_arg_off_size(argc - num, argv + num, &dev, &offset, &size,
 214                              &maxsize, MTD_DEV_TYPE_NAND, mtd->size))
 215                 return CMD_RET_FAILURE;
 216
 217         boot_cfg->maxsize = maxsize;
 218         boot_cfg->offset = offset;
 219
 220         debug("max: %llx, offset: %llx\n", maxsize, offset);
 221
 222         if (size && size != maxsize)
 223                 boot_cfg->input_size = size;
 224
 225         return CMD_RET_SUCCESS;
 226 }
 227
 228 static int nandbcb_set_boot_config(int argc, char * const argv[],
 229                                    struct boot_config *boot_cfg)
 230 {
 231         struct mtd_info *mtd;
 232         loff_t maxsize;
 233         loff_t boot_stream1_address, boot_stream2_address, max_boot_stream_size;
 234
 235         if (!boot_cfg->mtd) {
 236                 printf("Didn't get the mtd info, quit\n");
 237                 return CMD_RET_FAILURE;
 238         }
 239         mtd = boot_cfg->mtd;
 240
 241         /*
 242          * By default
 243          * set the search count as 4
 244          * set each FCB/DBBT/Firmware offset at the beginning of blocks
 245          * customers may change the value as needed
 246          */
 247
 248         /* if need more compact layout, change these values */
 249         /* g_boot_search_count was set as 4 at the definition*/
 250         /* g_pages_per_stride was set as block size */
 251
 252         g_pages_per_stride = mtd->erasesize / mtd->writesize;
 253
 254         g_boot_search_stride = mtd->writesize * g_pages_per_stride;
 255
 256         boot_cfg->stride_size_in_byte = g_boot_search_stride * mtd->writesize;
 257         boot_cfg->search_area_size_in_bytes =
 258                 g_boot_search_count * g_boot_search_stride;
 259         boot_cfg->search_area_size_in_pages =
 260                 boot_cfg->search_area_size_in_bytes / mtd->writesize;
 261
 262         /* after FCB/DBBT, split the rest of area for two Firmwares */
 263         if (!boot_cfg->maxsize) {
 264                 printf("Didn't get the maxsize, quit\n");
 265                 return CMD_RET_FAILURE;
 266         }
 267         maxsize = boot_cfg->maxsize;
 268         /* align to page boundary */
 269         maxsize = ((u32)(maxsize + mtd->writesize - 1)) / (u32)mtd->writesize
 270                         * mtd->writesize;
 271
 272         boot_stream1_address = 2 * boot_cfg->search_area_size_in_bytes;
 273         boot_stream2_address = ((maxsize - boot_stream1_address) / 2 +
 274                                boot_stream1_address);
 275
 276         if (boot_cfg->secondary_boot_stream_off_in_MB)
 277                 boot_stream2_address = boot_cfg->secondary_boot_stream_off_in_MB * 1024 * 1024;
 278
 279         max_boot_stream_size = boot_stream2_address - boot_stream1_address;
 280
 281         /* sanity check */
 282         if (max_boot_stream_size <= 0) {
 283                 debug("st1_addr: %llx, st2_addr: %llx, max: %llx\n",
 284                       boot_stream1_address, boot_stream2_address,
 285                       max_boot_stream_size);
 286                 printf("something wrong with firmware address settings\n");
 287                 return CMD_RET_FAILURE;
 288         }
 289         boot_cfg->boot_stream1_address = boot_stream1_address;
 290         boot_cfg->boot_stream2_address = boot_stream2_address;
 291         boot_cfg->max_boot_stream_size = max_boot_stream_size;
 292
 293         /* set the boot_stream size as the input size now */
 294         if (boot_cfg->input_size) {
 295                 boot_cfg->boot_stream1_size = boot_cfg->input_size;
 296                 boot_cfg->boot_stream2_size = boot_cfg->input_size;
 297         }
 298
 299         return CMD_RET_SUCCESS;
 300 }
 301
 302 static int nandbcb_check_space(struct boot_config *boot_cfg)
 303 {
 304         size_t maxsize = boot_cfg->maxsize;
 305         size_t max_boot_stream_size = boot_cfg->max_boot_stream_size;
 306         loff_t boot_stream2_address = boot_cfg->boot_stream2_address;
 307
 308         if (boot_cfg->boot_stream1_size &&
 309             boot_cfg->boot_stream1_size > max_boot_stream_size) {
 310                 printf("boot stream1 doesn't fit, check partition size or settings\n");
 311                 return CMD_RET_FAILURE;
 312         }
 313
 314         if (boot_cfg->boot_stream2_size &&
 315             boot_cfg->boot_stream2_size > maxsize - boot_stream2_address) {
 316                 printf("boot stream2 doesn't fit, check partition size or settings\n");
 317                 return CMD_RET_FAILURE;
 318         }
 319
 320         return CMD_RET_SUCCESS;
 321 }
 322
 323 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
 324 static uint8_t reverse_bit(uint8_t b)
 325 {
 326         b = (b & 0xf0) >> 4 | (b & 0x0f) << 4;
 327         b = (b & 0xcc) >> 2 | (b & 0x33) << 2;
 328         b = (b & 0xaa) >> 1 | (b & 0x55) << 1;
 329
 330         return b;
 331 }
 332
 333 static void encode_bch_ecc(void *buf, struct fcb_block *fcb, int eccbits)
 334 {
 335         int i, j, m = 13;
 336         int blocksize = 128;
 337         int numblocks = 8;
 338         int ecc_buf_size = (m * eccbits + 7) / 8;
 339         struct bch_control *bch = init_bch(m, eccbits, 0);
 340         u8 *ecc_buf = kzalloc(ecc_buf_size, GFP_KERNEL);
 341         u8 *tmp_buf = kzalloc(blocksize * numblocks, GFP_KERNEL);
 342         u8 *psrc, *pdst;
 343
 344         /*
 345          * The blocks here are bit aligned. If eccbits is a multiple of 8,
 346          * we just can copy bytes. Otherwiese we must move the blocks to
 347          * the next free bit position.
 348          */
 349         WARN_ON(eccbits % 8);
 350
 351         memcpy(tmp_buf, fcb, sizeof(*fcb));
 352
 353         for (i = 0; i < numblocks; i++) {
 354                 memset(ecc_buf, 0, ecc_buf_size);
 355                 psrc = tmp_buf + i * blocksize;
 356                 pdst = buf + i * (blocksize + ecc_buf_size);
 357
 358                 /* copy data byte aligned to destination buf */
 359                 memcpy(pdst, psrc, blocksize);
 360
 361                 /*
 362                  * imx-kobs use a modified encode_bch which reverse the
 363                  * bit order of the data before calculating bch.
 364                  * Do this in the buffer and use the bch lib here.
 365                  */
 366                 for (j = 0; j < blocksize; j++)
 367                         psrc[j] = reverse_bit(psrc[j]);
 368
 369                 encode_bch(bch, psrc, blocksize, ecc_buf);
 370
 371                 /* reverse ecc bit */
 372                 for (j = 0; j < ecc_buf_size; j++)
 373                         ecc_buf[j] = reverse_bit(ecc_buf[j]);
 374
 375                 /* Here eccbuf is byte aligned and we can just copy it */
 376                 memcpy(pdst + blocksize, ecc_buf, ecc_buf_size);
 377         }
 378
 379         kfree(ecc_buf);
 380         kfree(tmp_buf);
 381         free_bch(bch);
 382 }
 383 #else
 384
 385 static u8 calculate_parity_13_8(u8 d)
 386 {
 387         u8 p = 0;
 388
 389         p |= (GETBIT(d, 6) ^ GETBIT(d, 5) ^ GETBIT(d, 3) ^ GETBIT(d, 2)) << 0;
 390         p |= (GETBIT(d, 7) ^ GETBIT(d, 5) ^ GETBIT(d, 4) ^ GETBIT(d, 2) ^
 391               GETBIT(d, 1)) << 1;
 392         p |= (GETBIT(d, 7) ^ GETBIT(d, 6) ^ GETBIT(d, 5) ^ GETBIT(d, 1) ^
 393               GETBIT(d, 0)) << 2;
 394         p |= (GETBIT(d, 7) ^ GETBIT(d, 4) ^ GETBIT(d, 3) ^ GETBIT(d, 0)) << 3;
 395         p |= (GETBIT(d, 6) ^ GETBIT(d, 4) ^ GETBIT(d, 3) ^ GETBIT(d, 2) ^
 396               GETBIT(d, 1) ^ GETBIT(d, 0)) << 4;
 397
 398         return p;
 399 }
 400
 401 static void encode_hamming_13_8(void *_src, void *_ecc, size_t size)
 402 {
 403         int i;
 404         u8 *src = _src;
 405         u8 *ecc = _ecc;
 406
 407         for (i = 0; i < size; i++)
 408                 ecc[i] = calculate_parity_13_8(src[i]);
 409 }
 410 #endif
 411
 412 static u32 calc_chksum(void *buf, size_t size)
 413 {
 414         u32 chksum = 0;
 415         u8 *bp = buf;
 416         size_t i;
 417
 418         for (i = 0; i < size; i++)
 419                 chksum += bp[i];
 420
 421         return ~chksum;
 422 }
 423
 424 static void fill_fcb(struct fcb_block *fcb, struct boot_config *boot_cfg)
 425 {
 426         struct mtd_info *mtd = boot_cfg->mtd;
 427         struct nand_chip *chip = mtd_to_nand(mtd);
 428         struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
 429         struct mxs_nand_layout l;
 430
 431         mxs_nand_get_layout(mtd, &l);
 432
 433         fcb->fingerprint = FCB_FINGERPRINT;
 434         fcb->version = FCB_VERSION_1;
 435
 436         fcb->datasetup = 80;
 437         fcb->datahold = 60;
 438         fcb->addr_setup = 25;
 439         fcb->dsample_time = 6;
 440
 441         fcb->pagesize = mtd->writesize;
 442         fcb->oob_pagesize = mtd->writesize + mtd->oobsize;
 443         fcb->sectors = mtd->erasesize / mtd->writesize;
 444
 445         fcb->meta_size = l.meta_size;
 446         fcb->nr_blocks = l.nblocks;
 447         fcb->ecc_nr = l.data0_size;
 448         fcb->ecc_level = l.ecc0;
 449         fcb->ecc_size = l.datan_size;
 450         fcb->ecc_type = l.eccn;
 451         fcb->bchtype = l.gf_len;
 452
 453         /* DBBT search area starts from the next block after all FCB */
 454         fcb->dbbt_start = boot_cfg->search_area_size_in_pages;
 455
 456         fcb->bb_byte = nand_info->bch_geometry.block_mark_byte_offset;
 457         fcb->bb_start_bit = nand_info->bch_geometry.block_mark_bit_offset;
 458
 459         fcb->phy_offset = mtd->writesize;
 460
 461         fcb->disbbm = 0;
 462
 463         fcb->fw1_start = CONV_TO_PAGES(boot_cfg->boot_stream1_address);
 464         fcb->fw2_start = CONV_TO_PAGES(boot_cfg->boot_stream2_address);
 465         fcb->fw1_pages = CONV_TO_PAGES(boot_cfg->boot_stream1_size);
 466         fcb->fw2_pages = CONV_TO_PAGES(boot_cfg->boot_stream2_size);
 467
 468         fcb->checksum = calc_chksum((void *)fcb + 4, sizeof(*fcb) - 4);
 469 }
 470
 471 static int fill_dbbt_data(struct mtd_info *mtd, void *buf, int num_blocks)
 472 {
 473         int n, n_bad_blocks = 0;
 474         u32 *bb = buf + 0x8;
 475         u32 *n_bad_blocksp = buf + 0x4;
 476
 477         for (n = 0; n < num_blocks; n++) {
 478                 loff_t offset = n * mtd->erasesize;
 479                         if (mtd_block_isbad(mtd, offset)) {
 480                                 n_bad_blocks++;
 481                                 *bb = n;
 482                                 bb++;
 483                 }
 484         }
 485
 486         *n_bad_blocksp = n_bad_blocks;
 487
 488         return n_bad_blocks;
 489 }
 490
 491 /*
 492  * return 1     - bad block
 493  * return 0     - read successfully
 494  * return < 0   - read failed
 495  */
 496 static int read_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb,
 497                     loff_t off)
 498 {
 499         struct mtd_info *mtd;
 500         void *fcb_raw_page;
 501         size_t size;
 502         int ret = 0;
 503
 504         mtd = boot_cfg->mtd;
 505         fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
 506
 507         if (mtd_block_isbad(mtd, off)) {
 508                 printf("Block %d is bad, skipped\n", (int)CONV_TO_BLOCKS(off));
 509                 return 1;
 510         }
 511
 512         /*
 513          * User BCH hardware to decode ECC for FCB
 514          */
 515         if (plat_config.misc_flags & FCB_ENCODE_BCH) {
 516                 size = sizeof(struct fcb_block);
 517
 518                 /* switch nand BCH to FCB compatible settings */
 519                 if (plat_config.misc_flags & FCB_ENCODE_BCH_62b)
 520                         mxs_nand_mode_fcb_62bit(mtd);
 521                 else if (plat_config.misc_flags & FCB_ENCODE_BCH_40b)
 522                         mxs_nand_mode_fcb_40bit(mtd);
 523
 524                 ret = nand_read(mtd, off, &size, (u_char *)fcb);
 525
 526                 /* switch BCH back */
 527                 mxs_nand_mode_normal(mtd);
 528                 printf("NAND FCB read from 0x%llx offset 0x%zx read: %s\n",
 529                        off, size, ret ? "ERROR" : "OK");
 530
 531         } else if (plat_config.misc_flags & FCB_ENCODE_HAMMING) {
 532                 /* raw read*/
 533                 mtd_oob_ops_t ops = {
 534                         .datbuf = (u8 *)fcb_raw_page,
 535                         .oobbuf = ((u8 *)fcb_raw_page) + mtd->writesize,
 536                         .len = mtd->writesize,
 537                         .ooblen = mtd->oobsize,
 538                         .mode = MTD_OPS_RAW
 539                         };
 540
 541                 ret = mtd_read_oob(mtd, off, &ops);
 542                 printf("NAND FCB read from 0x%llx offset 0x%zx read: %s\n",
 543                        off, ops.len, ret ? "ERROR" : "OK");
 544         }
 545
 546         if (ret)
 547                 goto fcb_raw_page_err;
 548
 549         if ((plat_config.misc_flags & FCB_ENCODE_HAMMING) &&
 550             (plat_config.misc_flags & FCB_LAYOUT_RESV_12B))
 551                 memcpy(fcb, fcb_raw_page + 12, sizeof(struct fcb_block));
 552
 553 /* TODO: check if it can pass Hamming check */
 554
 555 fcb_raw_page_err:
 556         kfree(fcb_raw_page);
 557
 558         return ret;
 559 }
 560
 561 static int write_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb)
 562 {
 563         struct mtd_info *mtd;
 564         void *fcb_raw_page = NULL;
 565         int i, ret;
 566         loff_t off;
 567         size_t size;
 568
 569         mtd = boot_cfg->mtd;
 570
 571         /*
 572          * We prepare raw page only for i.MX6, for i.MX7 we
 573          * leverage BCH hw module instead
 574          */
 575         if ((plat_config.misc_flags & FCB_ENCODE_HAMMING) &&
 576             (plat_config.misc_flags & FCB_LAYOUT_RESV_12B)) {
 577                 fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize,
 578                                        GFP_KERNEL);
 579                 if (!fcb_raw_page) {
 580                         debug("failed to allocate fcb_raw_page\n");
 581                         ret = -ENOMEM;
 582                         return ret;
 583                 }
 584
 585 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
 586                 /* 40 bit BCH, for i.MX6UL(L) */
 587                 encode_bch_ecc(fcb_raw_page + 32, fcb, 40);
 588 #else
 589                 memcpy(fcb_raw_page + 12, fcb, sizeof(struct fcb_block));
 590                 encode_hamming_13_8(fcb_raw_page + 12,
 591                                     fcb_raw_page + 12 + 512, 512);
 592 #endif
 593                 /*
 594                  * Set the first and second byte of OOB data to 0xFF,
 595                  * not 0x00. These bytes are used as the Manufacturers Bad
 596                  * Block Marker (MBBM). Since the FCB is mostly written to
 597                  * the first page in a block, a scan for
 598                  * factory bad blocks will detect these blocks as bad, e.g.
 599                  * when function nand_scan_bbt() is executed to build a new
 600                  * bad block table.
 601                  */
 602                 memset(fcb_raw_page + mtd->writesize, 0xFF, 2);
 603         }
 604
 605         /* start writing FCB from the very beginning */
 606         off = 0;
 607
 608         for (i = 0; i < g_boot_search_count; i++) {
 609                 if (mtd_block_isbad(mtd, off)) {
 610                         printf("Block %d is bad, skipped\n", i);
 611                         continue;
 612                 }
 613
 614                 /*
 615                  * User BCH hardware module to generate ECC for FCB
 616                  */
 617                 if (plat_config.misc_flags & FCB_ENCODE_BCH) {
 618                         size = sizeof(struct fcb_block);
 619
 620                         /* switch nand BCH to FCB compatible settings */
 621                         if (plat_config.misc_flags & FCB_ENCODE_BCH_62b)
 622                                 mxs_nand_mode_fcb_62bit(mtd);
 623                         else if (plat_config.misc_flags & FCB_ENCODE_BCH_40b)
 624                                 mxs_nand_mode_fcb_40bit(mtd);
 625
 626                         ret = nand_write(mtd, off, &size, (u_char *)fcb);
 627
 628                         /* switch BCH back */
 629                         mxs_nand_mode_normal(mtd);
 630                         printf("NAND FCB write to 0x%zx offset 0x%llx written: %s\n",
 631                                size, off, ret ? "ERROR" : "OK");
 632
 633                 } else if (plat_config.misc_flags & FCB_ENCODE_HAMMING) {
 634                         /* raw write */
 635                         mtd_oob_ops_t ops = {
 636                                 .datbuf = (u8 *)fcb_raw_page,
 637                                 .oobbuf = ((u8 *)fcb_raw_page) +
 638                                           mtd->writesize,
 639                                 .len = mtd->writesize,
 640                                 .ooblen = mtd->oobsize,
 641                                 .mode = MTD_OPS_RAW
 642                         };
 643
 644                         ret = mtd_write_oob(mtd, off, &ops);
 645                         printf("NAND FCB write to 0x%llxx offset 0x%zx written: %s\n", off, ops.len, ret ? "ERROR" : "OK");
 646                 }
 647
 648                 if (ret)
 649                         goto fcb_raw_page_err;
 650
 651                 /* next writing location */
 652                 off += g_boot_search_stride;
 653         }
 654
 655         return 0;
 656
 657 fcb_raw_page_err:
 658         kfree(fcb_raw_page);
 659
 660         return ret;
 661 }
 662
 663 /*
 664  * return 1     - bad block
 665  * return 0     - read successfully
 666  * return < 0   - read failed
 667  */
 668 static int read_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
 669                       void *dbbt_data_page, loff_t off)
 670 {
 671         size_t size;
 672         struct mtd_info *mtd;
 673         loff_t to;
 674         int ret;
 675
 676         mtd = boot_cfg->mtd;
 677
 678         if (mtd_block_isbad(mtd, off)) {
 679                 printf("Block %d is bad, skipped\n",
 680                        (int)CONV_TO_BLOCKS(off));
 681                 return 1;
 682         }
 683
 684         size = sizeof(struct dbbt_block);
 685         ret = nand_read(mtd, off, &size, (u_char *)dbbt);
 686         printf("NAND DBBT read from 0x%llx offset 0x%zx read: %s\n",
 687                off, size, ret ? "ERROR" : "OK");
 688         if (ret)
 689                 return ret;
 690
 691         /* dbbtpages == 0 if no bad blocks */
 692         if (dbbt->dbbtpages > 0) {
 693                 to = off + 4 * mtd->writesize;
 694                 size = mtd->writesize;
 695                 ret = nand_read(mtd, to, &size, dbbt_data_page);
 696                 printf("DBBT data read from 0x%llx offset 0x%zx read: %s\n",
 697                        to, size, ret ? "ERROR" : "OK");
 698
 699                 if (ret)
 700                         return ret;
 701         }
 702
 703         return 0;
 704 }
 705
 706 static int write_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
 707                       void *dbbt_data_page)
 708 {
 709         int i;
 710         loff_t off, to;
 711         size_t size;
 712         struct mtd_info *mtd;
 713         int ret;
 714
 715         mtd = boot_cfg->mtd;
 716
 717         /* start writing DBBT after all FCBs */
 718         off = boot_cfg->search_area_size_in_bytes;
 719         size = mtd->writesize;
 720
 721         for (i = 0; i < g_boot_search_count; i++) {
 722                 if (mtd_block_isbad(mtd, off)) {
 723                         printf("Block %d is bad, skipped\n",
 724                                (int)(i + CONV_TO_BLOCKS(off)));
 725                         continue;
 726                 }
 727
 728                 ret = nand_write(mtd, off, &size, (u_char *)dbbt);
 729                 printf("NAND DBBT write to 0x%llx offset 0x%zx written: %s\n",
 730                        off, size, ret ? "ERROR" : "OK");
 731                 if (ret)
 732                         return ret;
 733
 734                 /* dbbtpages == 0 if no bad blocks */
 735                 if (dbbt->dbbtpages > 0) {
 736                         to = off + 4 * mtd->writesize;
 737                         ret = nand_write(mtd, to, &size, dbbt_data_page);
 738                         printf("DBBT data write to 0x%llx offset 0x%zx written: %s\n",
 739                                to, size, ret ? "ERROR" : "OK");
 740
 741                 if (ret)
 742                         return ret;
 743                 }
 744
 745                 /* next writing location */
 746                 off += g_boot_search_stride;
 747         }
 748
 749         return 0;
 750 }
 751
 752 /* reuse the check_skip_len from nand_util.c with minor change*/
 753 static int check_skip_length(struct boot_config *boot_cfg, loff_t offset,
 754                              size_t length, size_t *used)
 755 {
 756         struct mtd_info *mtd = boot_cfg->mtd;
 757         size_t maxsize = boot_cfg->maxsize;
 758         size_t len_excl_bad = 0;
 759         int ret = 0;
 760
 761         while (len_excl_bad < length) {
 762                 size_t block_len, block_off;
 763                 loff_t block_start;
 764
 765                 if (offset >= maxsize)
 766                         return -1;
 767
 768                 block_start = offset & ~(loff_t)(mtd->erasesize - 1);
 769                 block_off = offset & (mtd->erasesize - 1);
 770                 block_len = mtd->erasesize - block_off;
 771
 772                 if (!nand_block_isbad(mtd, block_start))
 773                         len_excl_bad += block_len;
 774                 else
 775                         ret = 1;
 776
 777                 offset += block_len;
 778                 *used += block_len;
 779         }
 780
 781         /* If the length is not a multiple of block_len, adjust. */
 782         if (len_excl_bad > length)
 783                 *used -= (len_excl_bad - length);
 784
 785         return ret;
 786 }
 787
 788 static int nandbcb_get_next_good_blk_addr(struct boot_config *boot_cfg,
 789                                           struct boot_stream_config *bs_cfg)
 790 {
 791         struct mtd_info *mtd = boot_cfg->mtd;
 792         loff_t offset = bs_cfg->bs_addr;
 793         size_t length = bs_cfg->bs_size;
 794         size_t used = 0;
 795         int ret;
 796
 797         ret = check_skip_length(boot_cfg, offset, length, &used);
 798
 799         if (ret < 0)
 800                 return ret;
 801
 802         /* get next image address */
 803         bs_cfg->next_bs_addr = (u32)(offset + used + mtd->erasesize - 1)
 804                                  / (u32)mtd->erasesize * mtd->erasesize;
 805
 806         return ret;
 807 }
 808
 809 static int nandbcb_write_bs_skip_bad(struct boot_config *boot_cfg,
 810                                      struct boot_stream_config *bs_cfg)
 811 {
 812         struct mtd_info *mtd;
 813         void *buf;
 814         loff_t offset, maxsize;
 815         size_t size;
 816         size_t length;
 817         int ret;
 818         bool padding_flag = false;
 819
 820         mtd = boot_cfg->mtd;
 821         offset = bs_cfg->bs_addr;
 822         maxsize = boot_cfg->maxsize;
 823         size = bs_cfg->bs_size;
 824
 825         /* some boot images may need leading offset */
 826         if (bs_cfg->need_padding &&
 827             (plat_config.misc_flags & FIRMWARE_NEED_PADDING))
 828                 padding_flag = 1;
 829
 830         if (padding_flag)
 831                 length = ALIGN(size + FLASH_OFFSET_STANDARD, mtd->writesize);
 832         else
 833                 length = ALIGN(size, mtd->writesize);
 834
 835         buf = kzalloc(length, GFP_KERNEL);
 836         if (!buf) {
 837                 printf("failed to allocate buffer for firmware\n");
 838                 ret = -ENOMEM;
 839                 return ret;
 840         }
 841
 842         if (padding_flag)
 843                 memcpy(buf + FLASH_OFFSET_STANDARD, bs_cfg->bs_buf, size);
 844         else
 845                 memcpy(buf, bs_cfg->bs_buf, size);
 846
 847         ret = nand_write_skip_bad(mtd, offset, &length, NULL, maxsize,
 848                                   (u_char *)buf, WITH_WR_VERIFY);
 849         printf("Write %s @0x%llx offset, 0x%zx bytes written: %s\n",
 850                bs_cfg->bs_label, offset, length, ret ? "ERROR" : "OK");
 851
 852         if (ret)
 853                 /* write image failed, quit */
 854                 goto err;
 855
 856         /* get next good blk address if needed */
 857         if (bs_cfg->need_padding) {
 858                 ret = nandbcb_get_next_good_blk_addr(boot_cfg, bs_cfg);
 859                 if (ret < 0) {
 860                         printf("Next image cannot fit in NAND partition\n");
 861                         goto err;
 862                 }
 863         }
 864
 865         /* now we know how the exact image size written to NAND */
 866         bs_cfg->bs_size = length;
 867         return 0;
 868 err:
 869         kfree(buf);
 870         return ret;
 871 }
 872
 873 static int nandbcb_write_fw(struct boot_config *boot_cfg, u_char *buf,
 874                             int index)
 875 {
 876         int i;
 877         loff_t offset;
 878         size_t size;
 879         loff_t next_bs_addr;
 880         struct boot_stream_config bs_cfg;
 881         int ret;
 882
 883         for (i = 0; i < 2; ++i) {
 884                 if (!(FW_INX(i) & index))
 885                         continue;
 886
 887                 if (i == 0) {
 888                         offset = boot_cfg->boot_stream1_address;
 889                         size = boot_cfg->boot_stream1_size;
 890                 } else {
 891                         offset = boot_cfg->boot_stream2_address;
 892                         size = boot_cfg->boot_stream2_size;
 893                 }
 894
 895                 /* write Firmware*/
 896                 if (!(plat_config.misc_flags & FIRMWARE_EXTRA_ONE)) {
 897                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 898                         sprintf(bs_cfg.bs_label, "firmware%d", i);
 899                         bs_cfg.bs_addr = offset;
 900                         bs_cfg.bs_size = size;
 901                         bs_cfg.bs_buf = buf;
 902                         bs_cfg.need_padding = 1;
 903
 904                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 905                         if (ret)
 906                                 return ret;
 907
 908                         /* update the boot stream size */
 909                         if (i == 0)
 910                                 boot_cfg->boot_stream1_size = bs_cfg.bs_size;
 911                         else
 912                                 boot_cfg->boot_stream2_size = bs_cfg.bs_size;
 913
 914                 } else {
 915                 /* some platforms need extra firmware */
 916                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 917                         sprintf(bs_cfg.bs_label, "fw%d_part%d", i, 1);
 918                         bs_cfg.bs_addr = offset;
 919                         bs_cfg.bs_size = IMX8MQ_HDMI_FW_SZ;
 920                         bs_cfg.bs_buf = buf;
 921                         bs_cfg.need_padding = 1;
 922
 923                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 924                         if (ret)
 925                                 return ret;
 926
 927                         /* update the boot stream size */
 928                         if (i == 0)
 929                                 boot_cfg->boot_stream1_size = bs_cfg.bs_size;
 930                         else
 931                                 boot_cfg->boot_stream2_size = bs_cfg.bs_size;
 932
 933                         /* get next image address */
 934                         next_bs_addr = bs_cfg.next_bs_addr;
 935
 936                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 937                         sprintf(bs_cfg.bs_label, "fw%d_part%d", i, 2);
 938                         bs_cfg.bs_addr = next_bs_addr;
 939                         bs_cfg.bs_size = IMX8MQ_SPL_SZ;
 940                         bs_cfg.bs_buf = (u_char *)(buf + IMX8MQ_HDMI_FW_SZ);
 941                         bs_cfg.need_padding = 0;
 942
 943                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 944                         if (ret)
 945                                 return ret;
 946                 }
 947         }
 948
 949         return 0;
 950 }
 951
 952 static int nandbcb_init(struct boot_config *boot_cfg, u_char *buf)
 953 {
 954         struct mtd_info *mtd;
 955         nand_erase_options_t opts;
 956         struct fcb_block *fcb;
 957         struct dbbt_block *dbbt;
 958         void *dbbt_page, *dbbt_data_page;
 959         int ret;
 960         loff_t maxsize, off;
 961
 962         mtd = boot_cfg->mtd;
 963         maxsize = boot_cfg->maxsize;
 964         off = boot_cfg->offset;
 965
 966         /* erase */
 967         memset(&opts, 0, sizeof(opts));
 968         opts.offset = off;
 969         opts.length = maxsize - 1;
 970         ret = nand_erase_opts(mtd, &opts);
 971         if (ret) {
 972                 printf("%s: erase failed (ret = %d)\n", __func__, ret);
 973                 return ret;
 974         }
 975
 976         /*
 977          * Reference documentation from i.MX6DQRM section 8.5.2.2
 978          *
 979          * Nand Boot Control Block(BCB) contains two data structures,
 980          * - Firmware Configuration Block(FCB)
 981          * - Discovered Bad Block Table(DBBT)
 982          *
 983          * FCB contains,
 984          * - nand timings
 985          * - DBBT search page address,
 986          * - start page address of primary firmware
 987          * - start page address of secondary firmware
 988          *
 989          * setup fcb:
 990          * - number of blocks = mtd partition size / mtd erasesize
 991          * - two firmware blocks, primary and secondary
 992          * - first 4 block for FCB/DBBT
 993          * - rest split in half for primary and secondary firmware
 994          * - same firmware write twice
 995          */
 996
 997         /* write Firmware*/
 998         ret = nandbcb_write_fw(boot_cfg, buf, FW_ALL);
 999         if (ret)
1000                 goto err;
1001
1002         /* fill fcb */
1003         fcb = kzalloc(sizeof(*fcb), GFP_KERNEL);
1004         if (!fcb) {
1005                 debug("failed to allocate fcb\n");
1006                 ret = -ENOMEM;
1007                 return ret;
1008         }
1009         fill_fcb(fcb, boot_cfg);
1010
1011         ret = write_fcb(boot_cfg, fcb);
1012
1013         /* fill dbbt */
1014         dbbt_page = kzalloc(mtd->writesize, GFP_KERNEL);
1015         if (!dbbt_page) {
1016                 debug("failed to allocate dbbt_page\n");
1017                 ret = -ENOMEM;
1018                 goto fcb_err;
1019         }
1020
1021         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1022         if (!dbbt_data_page) {
1023                 debug("failed to allocate dbbt_data_page\n");
1024                 ret = -ENOMEM;
1025                 goto dbbt_page_err;
1026         }
1027
1028         dbbt = dbbt_page;
1029         dbbt->checksum = 0;
1030         dbbt->fingerprint = DBBT_FINGERPRINT;
1031         dbbt->version = DBBT_VERSION_1;
1032         ret = fill_dbbt_data(mtd, dbbt_data_page, CONV_TO_BLOCKS(maxsize));
1033         if (ret < 0)
1034                 goto dbbt_data_page_err;
1035         else if (ret > 0)
1036                 dbbt->dbbtpages = 1;
1037
1038         /* write dbbt */
1039         ret = write_dbbt(boot_cfg, dbbt, dbbt_data_page);
1040         if (ret < 0)
1041                 printf("failed to write FCB/DBBT\n");
1042
1043 dbbt_data_page_err:
1044         kfree(dbbt_data_page);
1045 dbbt_page_err:
1046         kfree(dbbt_page);
1047 fcb_err:
1048         kfree(fcb);
1049 err:
1050         return ret;
1051 }
1052
1053 static int do_nandbcb_bcbonly(int argc, char *const argv[])
1054 {
1055         struct fcb_block *fcb;
1056         struct dbbt_block *dbbt;
1057         struct mtd_info *mtd;
1058         nand_erase_options_t opts;
1059         size_t maxsize;
1060         loff_t off;
1061         void *dbbt_page, *dbbt_data_page;
1062         int ret;
1063         struct boot_config cfg;
1064
1065         if (argc < 4)
1066                 return CMD_RET_USAGE;
1067
1068         memset(&cfg, 0, sizeof(struct boot_config));
1069         if (nandbcb_get_info(argc, argv, &cfg))
1070                 return CMD_RET_FAILURE;
1071
1072         /* only get the partition info */
1073         if (nandbcb_get_size(2, argv, 1, &cfg))
1074                 return CMD_RET_FAILURE;
1075
1076         if (nandbcb_set_boot_config(argc, argv, &cfg))
1077                 return CMD_RET_FAILURE;
1078
1079         mtd = cfg.mtd;
1080
1081         cfg.boot_stream1_address = simple_strtoul(argv[2], NULL, 16);
1082         cfg.boot_stream1_size = simple_strtoul(argv[3], NULL, 16);
1083         cfg.boot_stream1_size = ALIGN(cfg.boot_stream1_size, mtd->writesize);
1084
1085         if (argc > 5) {
1086                 cfg.boot_stream2_address = simple_strtoul(argv[4], NULL, 16);
1087                 cfg.boot_stream2_size = simple_strtoul(argv[5], NULL, 16);
1088                 cfg.boot_stream2_size = ALIGN(cfg.boot_stream2_size,
1089                                               mtd->writesize);
1090         }
1091
1092         /* sanity check */
1093         nandbcb_check_space(&cfg);
1094
1095         maxsize = cfg.maxsize;
1096         off = cfg.offset;
1097
1098         /* erase the previous FCB/DBBT */
1099         memset(&opts, 0, sizeof(opts));
1100         opts.offset = off;
1101         opts.length = g_boot_search_stride * 2;
1102         ret = nand_erase_opts(mtd, &opts);
1103         if (ret) {
1104                 printf("%s: erase failed (ret = %d)\n", __func__, ret);
1105                 return CMD_RET_FAILURE;
1106         }
1107
1108         /* fill fcb */
1109         fcb = kzalloc(sizeof(*fcb), GFP_KERNEL);
1110         if (!fcb) {
1111                 printf("failed to allocate fcb\n");
1112                 ret = -ENOMEM;
1113                 return CMD_RET_FAILURE;
1114         }
1115
1116         fill_fcb(fcb, &cfg);
1117
1118         /* write fcb */
1119         ret = write_fcb(&cfg, fcb);
1120
1121         /* fill dbbt */
1122         dbbt_page = kzalloc(mtd->writesize, GFP_KERNEL);
1123         if (!dbbt_page) {
1124                 printf("failed to allocate dbbt_page\n");
1125                 ret = -ENOMEM;
1126                 goto fcb_err;
1127         }
1128
1129         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1130         if (!dbbt_data_page) {
1131                 printf("failed to allocate dbbt_data_page\n");
1132                 ret = -ENOMEM;
1133                 goto dbbt_page_err;
1134         }
1135
1136         dbbt = dbbt_page;
1137         dbbt->checksum = 0;
1138         dbbt->fingerprint = DBBT_FINGERPRINT;
1139         dbbt->version = DBBT_VERSION_1;
1140         ret = fill_dbbt_data(mtd, dbbt_data_page, CONV_TO_BLOCKS(maxsize));
1141         if (ret < 0)
1142                 goto dbbt_data_page_err;
1143         else if (ret > 0)
1144                 dbbt->dbbtpages = 1;
1145
1146         /* write dbbt */
1147         ret = write_dbbt(&cfg, dbbt, dbbt_data_page);
1148
1149 dbbt_data_page_err:
1150         kfree(dbbt_data_page);
1151 dbbt_page_err:
1152         kfree(dbbt_page);
1153 fcb_err:
1154         kfree(fcb);
1155
1156         if (ret < 0) {
1157                 printf("failed to write FCB/DBBT\n");
1158                 return CMD_RET_FAILURE;
1159         }
1160
1161         return CMD_RET_SUCCESS;
1162 }
1163
1164 /* dump data which is read from NAND chip */
1165 void dump_structure(struct boot_config *boot_cfg, struct fcb_block *fcb,
1166                     struct dbbt_block *dbbt, void *dbbt_data_page)
1167 {
1168         int i;
1169         struct mtd_info *mtd = boot_cfg->mtd;
1170
1171         #define P1(x) printf("  %s = 0x%08x\n", #x, fcb->x)
1172                 printf("FCB\n");
1173                 P1(checksum);
1174                 P1(fingerprint);
1175                 P1(version);
1176         #undef P1
1177         #define P1(x)   printf("  %s = %d\n", #x, fcb->x)
1178                 P1(datasetup);
1179                 P1(datahold);
1180                 P1(addr_setup);
1181                 P1(dsample_time);
1182                 P1(pagesize);
1183                 P1(oob_pagesize);
1184                 P1(sectors);
1185                 P1(nr_nand);
1186                 P1(nr_die);
1187                 P1(celltype);
1188                 P1(ecc_type);
1189                 P1(ecc_nr);
1190                 P1(ecc_size);
1191                 P1(ecc_level);
1192                 P1(meta_size);
1193                 P1(nr_blocks);
1194                 P1(ecc_type_sdk);
1195                 P1(ecc_nr_sdk);
1196                 P1(ecc_size_sdk);
1197                 P1(ecc_level_sdk);
1198                 P1(nr_blocks_sdk);
1199                 P1(meta_size_sdk);
1200                 P1(erase_th);
1201                 P1(bootpatch);
1202                 P1(patch_size);
1203                 P1(fw1_start);
1204                 P1(fw2_start);
1205                 P1(fw1_pages);
1206                 P1(fw2_pages);
1207                 P1(dbbt_start);
1208                 P1(bb_byte);
1209                 P1(bb_start_bit);
1210                 P1(phy_offset);
1211                 P1(bchtype);
1212                 P1(readlatency);
1213                 P1(predelay);
1214                 P1(cedelay);
1215                 P1(postdelay);
1216                 P1(cmdaddpause);
1217                 P1(datapause);
1218                 P1(tmspeed);
1219                 P1(busytimeout);
1220                 P1(disbbm);
1221                 P1(spare_offset);
1222 #if !defined(CONFIG_MX6) || defined(CONFIG_MX6SX) || \
1223         defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
1224                 P1(onfi_sync_enable);
1225                 P1(onfi_sync_speed);
1226                 P1(onfi_sync_nand_data);
1227                 P1(disbbm_search);
1228                 P1(disbbm_search_limit);
1229                 P1(read_retry_enable);
1230 #endif
1231         #undef P1
1232         #define P1(x)   printf("  %s = 0x%08x\n", #x, dbbt->x)
1233                 printf("DBBT :\n");
1234                 P1(checksum);
1235                 P1(fingerprint);
1236                 P1(version);
1237         #undef P1
1238         #define P1(x)   printf("  %s = %d\n", #x, dbbt->x)
1239                 P1(dbbtpages);
1240         #undef P1
1241
1242         for (i = 0; i < dbbt->dbbtpages; ++i)
1243                 printf("%d ", *((u32 *)(dbbt_data_page + i)));
1244
1245         if (!(plat_config.misc_flags & FIRMWARE_EXTRA_ONE)) {
1246                 printf("Firmware: image #0 @ 0x%x size 0x%x\n",
1247                        fcb->fw1_start, fcb->fw1_pages * mtd->writesize);
1248                 printf("Firmware: image #1 @ 0x%x size 0x%x\n",
1249                        fcb->fw2_start, fcb->fw2_pages * mtd->writesize);
1250         } else {
1251                 printf("Firmware: image #0 @ 0x%x size 0x%x\n",
1252                        fcb->fw1_start, fcb->fw1_pages * mtd->writesize);
1253                 printf("Firmware: image #1 @ 0x%x size 0x%x\n",
1254                        fcb->fw2_start, fcb->fw2_pages * mtd->writesize);
1255                 /* TODO: Add extra image information */
1256         }
1257 }
1258
1259 static bool check_fingerprint(void *data, int fingerprint)
1260 {
1261         int off = 4;
1262
1263         return (*(int *)(data + off) == fingerprint);
1264 }
1265
1266 static int fuse_to_search_count(u32 bank, u32 word, u32 mask, u32 off)
1267 {
1268         int err;
1269         u32 val;
1270         int ret;
1271
1272         /* by default, the boot search count from fuse should be 2 */
1273         err = fuse_read(bank, word, &val);
1274         if (err)
1275                 return 2;
1276
1277         val = (val & mask) >> off;
1278
1279         switch (val) {
1280                 case 0:
1281                         ret = 2;
1282                         break;
1283                 case 1:
1284                 case 2:
1285                 case 3:
1286                         ret = 1 << val;
1287                         break;
1288                 default:
1289                         ret = 2;
1290         }
1291
1292         return ret;
1293 }
1294
1295 static int nandbcb_dump(struct boot_config *boot_cfg)
1296 {
1297         int i;
1298         loff_t off;
1299         struct mtd_info *mtd = boot_cfg->mtd;
1300         struct fcb_block fcb, fcb_copy;
1301         struct dbbt_block dbbt, dbbt_copy;
1302         void *dbbt_data_page, *dbbt_data_page_copy;
1303         bool fcb_not_found, dbbt_not_found;
1304         int ret = 0;
1305
1306         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1307         if (!dbbt_data_page) {
1308                 printf("failed to allocate dbbt_data_page\n");
1309                 ret = -ENOMEM;
1310                 return ret;
1311         }
1312
1313         dbbt_data_page_copy = kzalloc(mtd->writesize, GFP_KERNEL);
1314         if (!dbbt_data_page_copy) {
1315                 printf("failed to allocate dbbt_data_page\n");
1316                 ret = -ENOMEM;
1317                 goto dbbt_page_err;
1318         }
1319
1320         /* read fcb */
1321         fcb_not_found = 1;
1322         off = 0;
1323         for (i = 0; i < g_boot_search_count; ++i) {
1324                 if (fcb_not_found) {
1325                         ret = read_fcb(boot_cfg, &fcb, off);
1326
1327                         if (ret < 0)
1328                                 goto dbbt_page_copy_err;
1329                         else if (ret == 1)
1330                                 continue;
1331                         else if (ret == 0)
1332                                 if (check_fingerprint(&fcb, FCB_FINGERPRINT))
1333                                         fcb_not_found = 0;
1334                 } else {
1335                         ret = read_fcb(boot_cfg, &fcb_copy, off);
1336
1337                         if (ret < 0)
1338                                 goto dbbt_page_copy_err;
1339                         if (memcmp(&fcb, &fcb_copy,
1340                                    sizeof(struct fcb_block))) {
1341                                 printf("FCB copies are not identical\n");
1342                                 ret = -EINVAL;
1343                                 goto dbbt_page_copy_err;
1344                         }
1345                 }
1346
1347                 /* next read location */
1348                 off += g_boot_search_stride;
1349         }
1350
1351         /* read dbbt*/
1352         dbbt_not_found = 1;
1353         off = boot_cfg->search_area_size_in_bytes;
1354         for (i = 0; i < g_boot_search_count; ++i) {
1355                 if (dbbt_not_found) {
1356                         ret = read_dbbt(boot_cfg, &dbbt, dbbt_data_page, off);
1357
1358                         if (ret < 0)
1359                                 goto dbbt_page_copy_err;
1360                         else if (ret == 1)
1361                                 continue;
1362                         else if (ret == 0)
1363                                 if (check_fingerprint(&dbbt, DBBT_FINGERPRINT))
1364                                         dbbt_not_found = 0;
1365                 } else {
1366                         ret = read_dbbt(boot_cfg, &dbbt_copy,
1367                                         dbbt_data_page_copy, off);
1368
1369                         if (ret < 0)
1370                                 goto dbbt_page_copy_err;
1371                         if (memcmp(&dbbt, &dbbt_copy,
1372                                    sizeof(struct dbbt_block))) {
1373                                 printf("DBBT copies are not identical\n");
1374                                 ret = -EINVAL;
1375                                 goto dbbt_page_copy_err;
1376                         }
1377                         if (dbbt.dbbtpages > 0 &&
1378                             memcmp(dbbt_data_page, dbbt_data_page_copy,
1379                                    mtd->writesize)) {
1380                                 printf("DBBT data copies are not identical\n");
1381                                 ret = -EINVAL;
1382                                 goto dbbt_page_copy_err;
1383                         }
1384                 }
1385
1386                 /* next read location */
1387                 off += g_boot_search_stride;
1388         }
1389
1390         dump_structure(boot_cfg, &fcb, &dbbt, dbbt_data_page);
1391
1392 dbbt_page_copy_err:
1393         kfree(dbbt_data_page_copy);
1394 dbbt_page_err:
1395         kfree(dbbt_data_page);
1396
1397         return ret;
1398 }
1399
1400 static int do_nandbcb_dump(int argc, char * const argv[])
1401 {
1402         struct boot_config cfg;
1403         int ret;
1404
1405         if (argc != 2)
1406                 return CMD_RET_USAGE;
1407
1408         memset(&cfg, 0, sizeof(struct boot_config));
1409         if (nandbcb_get_info(argc, argv, &cfg))
1410                 return CMD_RET_FAILURE;
1411
1412         if (nandbcb_get_size(argc, argv, 1, &cfg))
1413                 return CMD_RET_FAILURE;
1414
1415         if (nandbcb_set_boot_config(argc, argv, &cfg))
1416                 return CMD_RET_FAILURE;
1417
1418         ret = nandbcb_dump(&cfg);
1419         if (ret)
1420                 return ret;
1421
1422         return ret;
1423 }
1424
1425 static int do_nandbcb_init(int argc, char * const argv[])
1426 {
1427         u_char *buf;
1428         size_t size;
1429         loff_t addr;
1430         char *endp;
1431         int ret;
1432         struct boot_config cfg;
1433
1434         if (argc != 4)
1435                 return CMD_RET_USAGE;
1436
1437         memset(&cfg, 0, sizeof(struct boot_config));
1438         if (nandbcb_get_info(argc, argv, &cfg))
1439                 return CMD_RET_FAILURE;
1440
1441         if (nandbcb_get_size(argc, argv, 2, &cfg))
1442                 return CMD_RET_FAILURE;
1443         size = cfg.boot_stream1_size;
1444
1445         if (nandbcb_set_boot_config(argc, argv, &cfg))
1446                 return CMD_RET_FAILURE;
1447
1448         addr = simple_strtoul(argv[1], &endp, 16);
1449         if (*argv[1] == 0 || *endp != 0)
1450                 return CMD_RET_FAILURE;
1451
1452         buf = map_physmem(addr, size, MAP_WRBACK);
1453         if (!buf) {
1454                 puts("failed to map physical memory\n");
1455                 return CMD_RET_FAILURE;
1456         }
1457
1458         ret = nandbcb_init(&cfg, buf);
1459
1460         return ret == 0 ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
1461 }
1462
1463 static int do_nandbcb(struct cmd_tbl *cmdtp, int flag, int argc,
1464                       char *const argv[])
1465 {
1466         const char *cmd;
1467         int ret = 0;
1468
1469         if (argc < 3)
1470                 goto usage;
1471
1472         /* check the platform config first */
1473         if (is_mx6sx()) {
1474                 plat_config = imx6sx_plat_config;
1475         } else if (is_mx7()) {
1476                 plat_config = imx7d_plat_config;
1477         } else if (is_mx6ul() || is_mx6ull()) {
1478                 plat_config = imx6ul_plat_config;
1479         } else if (is_mx6() && !is_mx6sx() && !is_mx6ul() && !is_mx6ull()) {
1480                 plat_config = imx6qdl_plat_config;
1481         } else if (is_imx8mq()) {
1482                 plat_config = imx8mq_plat_config;
1483         } else if (is_imx8mm()) {
1484                 plat_config = imx8mm_plat_config;
1485         } else if (is_imx8mn()) {
1486                 plat_config = imx8mn_plat_config;
1487         } else if (is_imx8qm() || is_imx8qxp()) {
1488                 plat_config = imx8q_plat_config;
1489         } else {
1490                 printf("ERROR: Unknown platform\n");
1491                 return CMD_RET_FAILURE;
1492         }
1493
1494         if (plat_config.misc_flags & BT_SEARCH_CNT_FROM_FUSE) {
1495                 if (is_imx8qxp()) {
1496                         g_boot_search_count = fuse_to_search_count(0, 720,
1497                                                                    0xc0, 6);
1498                         printf("search count set to %d from fuse\n",
1499                                g_boot_search_count);
1500                 }
1501         }
1502
1503         cmd = argv[1];
1504         --argc;
1505         ++argv;
1506
1507         if (strcmp(cmd, "init") == 0) {
1508                 ret = do_nandbcb_init(argc, argv);
1509                 goto done;
1510         }
1511
1512         if (strcmp(cmd, "dump") == 0) {
1513                 ret = do_nandbcb_dump(argc, argv);
1514                 goto done;
1515         }
1516
1517         if (strcmp(cmd, "bcbonly") == 0) {
1518                 ret = do_nandbcb_bcbonly(argc, argv);
1519                 goto done;
1520         }
1521
1522 done:
1523         if (ret != -1)
1524                 return ret;
1525 usage:
1526         return CMD_RET_USAGE;
1527 }
1528
1529 #ifdef CONFIG_SYS_LONGHELP
1530 static char nandbcb_help_text[] =
1531         "init addr off|partition len - update 'len' bytes starting at\n"
1532         "       'off|part' to memory address 'addr', skipping  bad blocks\n"
1533         "nandbcb bcbonly off|partition fw1-off fw1-size [fw2-off fw2-size]\n"
1534         "           - write BCB only (FCB and DBBT)\n"
1535         "       where `fwx-size` is fw sizes in bytes, `fw1-off`\n"
1536         "       and `fw2-off` - firmware offsets\n"
1537         "       FIY, BCB isn't erased automatically, so mtd erase should\n"
1538         "       be called in advance before writing new BCB:\n"
1539         "           > mtd erase mx7-bcb\n"
1540         "nandbcb dump off|partition - dump/verify boot structures\n";
1541 #endif
1542
1543 U_BOOT_CMD(nandbcb, 7, 1, do_nandbcb,
1544            "i.MX NAND Boot Control Blocks write",
1545            nandbcb_help_text
1546 );