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 #include <linux/bug.h>
  21
  22 #include <asm/io.h>
  23 #include <jffs2/jffs2.h>
  24 #include <linux/bch.h>
  25 #include <linux/mtd/mtd.h>
  26
  27 #include <asm/arch/sys_proto.h>
  28 #include <asm/mach-imx/imx-nandbcb.h>
  29 #include <asm/mach-imx/imximage.cfg>
  30 #include <mxs_nand.h>
  31 #include <linux/mtd/mtd.h>
  32 #include <nand.h>
  33 #include <fuse.h>
  34
  35 #include "../../../cmd/legacy-mtd-utils.h"
  36
  37 /* FCB related flags */
  38 /* FCB layout with leading 12B reserved */
  39 #define FCB_LAYOUT_RESV_12B             BIT(0)
  40 /* FCB layout with leading 32B meta data */
  41 #define FCB_LAYOUT_META_32B             BIT(1)
  42 /* FCB encrypted by Hamming code */
  43 #define FCB_ENCODE_HAMMING              BIT(2)
  44 /* FCB encrypted by 40bit BCH */
  45 #define FCB_ENCODE_BCH_40b              BIT(3)
  46 /* FCB encrypted by 62bit BCH */
  47 #define FCB_ENCODE_BCH_62b              BIT(4)
  48 /* FCB encrypted by BCH */
  49 #define FCB_ENCODE_BCH                  (FCB_ENCODE_BCH_40b | FCB_ENCODE_BCH_62b)
  50 /* FCB data was randomized */
  51 #define FCB_RANDON_ENABLED              BIT(5)
  52
  53 /* Firmware related flags */
  54 /* No 1K padding */
  55 #define FIRMWARE_NEED_PADDING           BIT(8)
  56 /* Extra firmware*/
  57 #define FIRMWARE_EXTRA_ONE              BIT(9)
  58 /* Secondary firmware on fixed address */
  59 #define FIRMWARE_SECONDARY_FIXED_ADDR   BIT(10)
  60
  61 /* Boot search related flags */
  62 #define BT_SEARCH_CNT_FROM_FUSE         BIT(16)
  63
  64 struct platform_config {
  65         int misc_flags;
  66 };
  67
  68 static struct platform_config plat_config;
  69
  70 /* imx6q/dl/solo */
  71 static struct platform_config imx6qdl_plat_config = {
  72         .misc_flags = FCB_LAYOUT_RESV_12B |
  73                      FCB_ENCODE_HAMMING |
  74                      FIRMWARE_NEED_PADDING,
  75 };
  76
  77 static struct platform_config imx6sx_plat_config = {
  78         .misc_flags = FCB_LAYOUT_META_32B |
  79                      FCB_ENCODE_BCH_62b |
  80                      FIRMWARE_NEED_PADDING |
  81                      FCB_RANDON_ENABLED,
  82 };
  83
  84 static struct platform_config imx7d_plat_config = {
  85         .misc_flags = FCB_LAYOUT_META_32B |
  86                      FCB_ENCODE_BCH_62b |
  87                      FIRMWARE_NEED_PADDING |
  88                      FCB_RANDON_ENABLED,
  89 };
  90
  91 /* imx6ul/ull/ulz */
  92 static struct platform_config imx6ul_plat_config = {
  93         .misc_flags = FCB_LAYOUT_META_32B |
  94                      FCB_ENCODE_BCH_40b |
  95                      FIRMWARE_NEED_PADDING,
  96 };
  97
  98 static struct platform_config imx8mq_plat_config = {
  99         .misc_flags = FCB_LAYOUT_META_32B |
 100                      FCB_ENCODE_BCH_62b |
 101                      FIRMWARE_NEED_PADDING |
 102                      FCB_RANDON_ENABLED |
 103                      FIRMWARE_EXTRA_ONE,
 104 };
 105
 106 /* all other imx8mm */
 107 static struct platform_config imx8mm_plat_config = {
 108         .misc_flags = FCB_LAYOUT_META_32B |
 109                      FCB_ENCODE_BCH_62b |
 110                      FIRMWARE_NEED_PADDING |
 111                      FCB_RANDON_ENABLED,
 112 };
 113
 114 /* imx8mn */
 115 static struct platform_config imx8mn_plat_config = {
 116         .misc_flags = FCB_LAYOUT_META_32B |
 117                      FCB_ENCODE_BCH_62b |
 118                      FCB_RANDON_ENABLED |
 119                      FIRMWARE_SECONDARY_FIXED_ADDR |
 120                      BT_SEARCH_CNT_FROM_FUSE,
 121 };
 122
 123 /* imx8qx/qm */
 124 static struct platform_config imx8q_plat_config = {
 125         .misc_flags = FCB_LAYOUT_META_32B |
 126                      FCB_ENCODE_BCH_62b |
 127                      FCB_RANDON_ENABLED |
 128                      FIRMWARE_SECONDARY_FIXED_ADDR |
 129                      BT_SEARCH_CNT_FROM_FUSE,
 130 };
 131
 132 /* boot search related variables and definitions */
 133 static int g_boot_search_count = 4;
 134 static int g_boot_search_stride;
 135 static int g_pages_per_stride;
 136
 137 /* mtd config structure */
 138 struct boot_config {
 139         int dev;
 140         struct mtd_info *mtd;
 141         loff_t maxsize;
 142         loff_t input_size;
 143         loff_t offset;
 144         loff_t boot_stream1_address;
 145         loff_t boot_stream2_address;
 146         size_t boot_stream1_size;
 147         size_t boot_stream2_size;
 148         size_t max_boot_stream_size;
 149         int stride_size_in_byte;
 150         int search_area_size_in_bytes;
 151         int search_area_size_in_pages;
 152         int secondary_boot_stream_off_in_MB;
 153 };
 154
 155 /* boot_stream config structure */
 156 struct boot_stream_config {
 157         char bs_label[32];
 158         loff_t bs_addr;
 159         size_t bs_size;
 160         void *bs_buf;
 161         loff_t next_bs_addr;
 162         bool need_padding;
 163 };
 164
 165 /* FW index */
 166 #define FW1_ONLY        1
 167 #define FW2_ONLY        2
 168 #define FW_ALL          FW1_ONLY | FW2_ONLY
 169 #define FW_INX(x)       (1 << (x))
 170
 171 /* NAND convert macros */
 172 #define CONV_TO_PAGES(x)        ((u32)(x) / (u32)(mtd->writesize))
 173 #define CONV_TO_BLOCKS(x)       ((u32)(x) / (u32)(mtd->erasesize))
 174
 175 #define GETBIT(v, n)            (((v) >> (n)) & 0x1)
 176 #define IMX8MQ_SPL_SZ 0x3e000
 177 #define IMX8MQ_HDMI_FW_SZ 0x19c00
 178
 179 static int nandbcb_get_info(int argc, char * const argv[],
 180                             struct boot_config *boot_cfg)
 181 {
 182         int dev;
 183         struct mtd_info *mtd;
 184
 185         dev = nand_curr_device;
 186         if (dev < 0) {
 187                 printf("failed to get nand_curr_device, run nand device\n");
 188                 return CMD_RET_FAILURE;
 189         }
 190
 191         mtd = get_nand_dev_by_index(dev);
 192         if (!mtd) {
 193                 printf("failed to get mtd info\n");
 194                 return CMD_RET_FAILURE;
 195         }
 196
 197         boot_cfg->dev = dev;
 198         boot_cfg->mtd = mtd;
 199
 200         return CMD_RET_SUCCESS;
 201 }
 202
 203 static int nandbcb_get_size(int argc, char * const argv[], int num,
 204                             struct boot_config *boot_cfg)
 205 {
 206         int dev;
 207         loff_t offset, size, maxsize;
 208         struct mtd_info *mtd;
 209
 210         dev = boot_cfg->dev;
 211         mtd = boot_cfg->mtd;
 212         size = 0;
 213
 214         if (mtd_arg_off_size(argc - num, argv + num, &dev, &offset, &size,
 215                              &maxsize, MTD_DEV_TYPE_NAND, mtd->size))
 216                 return CMD_RET_FAILURE;
 217
 218         boot_cfg->maxsize = maxsize;
 219         boot_cfg->offset = offset;
 220
 221         debug("max: %llx, offset: %llx\n", maxsize, offset);
 222
 223         if (size && size != maxsize)
 224                 boot_cfg->input_size = size;
 225
 226         return CMD_RET_SUCCESS;
 227 }
 228
 229 static int nandbcb_set_boot_config(int argc, char * const argv[],
 230                                    struct boot_config *boot_cfg)
 231 {
 232         struct mtd_info *mtd;
 233         loff_t maxsize;
 234         loff_t boot_stream1_address, boot_stream2_address, max_boot_stream_size;
 235
 236         if (!boot_cfg->mtd) {
 237                 printf("Didn't get the mtd info, quit\n");
 238                 return CMD_RET_FAILURE;
 239         }
 240         mtd = boot_cfg->mtd;
 241
 242         /*
 243          * By default
 244          * set the search count as 4
 245          * set each FCB/DBBT/Firmware offset at the beginning of blocks
 246          * customers may change the value as needed
 247          */
 248
 249         /* if need more compact layout, change these values */
 250         /* g_boot_search_count was set as 4 at the definition*/
 251         /* g_pages_per_stride was set as block size */
 252
 253         g_pages_per_stride = mtd->erasesize / mtd->writesize;
 254
 255         g_boot_search_stride = mtd->writesize * g_pages_per_stride;
 256
 257         boot_cfg->stride_size_in_byte = g_boot_search_stride * mtd->writesize;
 258         boot_cfg->search_area_size_in_bytes =
 259                 g_boot_search_count * g_boot_search_stride;
 260         boot_cfg->search_area_size_in_pages =
 261                 boot_cfg->search_area_size_in_bytes / mtd->writesize;
 262
 263         /* after FCB/DBBT, split the rest of area for two Firmwares */
 264         if (!boot_cfg->maxsize) {
 265                 printf("Didn't get the maxsize, quit\n");
 266                 return CMD_RET_FAILURE;
 267         }
 268         maxsize = boot_cfg->maxsize;
 269         /* align to page boundary */
 270         maxsize = ((u32)(maxsize + mtd->writesize - 1)) / (u32)mtd->writesize
 271                         * mtd->writesize;
 272
 273         boot_stream1_address = 2 * boot_cfg->search_area_size_in_bytes;
 274         boot_stream2_address = ((maxsize - boot_stream1_address) / 2 +
 275                                boot_stream1_address);
 276
 277         if (boot_cfg->secondary_boot_stream_off_in_MB)
 278                 boot_stream2_address = boot_cfg->secondary_boot_stream_off_in_MB * 1024 * 1024;
 279
 280         max_boot_stream_size = boot_stream2_address - boot_stream1_address;
 281
 282         /* sanity check */
 283         if (max_boot_stream_size <= 0) {
 284                 debug("st1_addr: %llx, st2_addr: %llx, max: %llx\n",
 285                       boot_stream1_address, boot_stream2_address,
 286                       max_boot_stream_size);
 287                 printf("something wrong with firmware address settings\n");
 288                 return CMD_RET_FAILURE;
 289         }
 290         boot_cfg->boot_stream1_address = boot_stream1_address;
 291         boot_cfg->boot_stream2_address = boot_stream2_address;
 292         boot_cfg->max_boot_stream_size = max_boot_stream_size;
 293
 294         /* set the boot_stream size as the input size now */
 295         if (boot_cfg->input_size) {
 296                 boot_cfg->boot_stream1_size = boot_cfg->input_size;
 297                 boot_cfg->boot_stream2_size = boot_cfg->input_size;
 298         }
 299
 300         return CMD_RET_SUCCESS;
 301 }
 302
 303 static int nandbcb_check_space(struct boot_config *boot_cfg)
 304 {
 305         size_t maxsize = boot_cfg->maxsize;
 306         size_t max_boot_stream_size = boot_cfg->max_boot_stream_size;
 307         loff_t boot_stream2_address = boot_cfg->boot_stream2_address;
 308
 309         if (boot_cfg->boot_stream1_size &&
 310             boot_cfg->boot_stream1_size > max_boot_stream_size) {
 311                 printf("boot stream1 doesn't fit, check partition size or settings\n");
 312                 return CMD_RET_FAILURE;
 313         }
 314
 315         if (boot_cfg->boot_stream2_size &&
 316             boot_cfg->boot_stream2_size > maxsize - boot_stream2_address) {
 317                 printf("boot stream2 doesn't fit, check partition size or settings\n");
 318                 return CMD_RET_FAILURE;
 319         }
 320
 321         return CMD_RET_SUCCESS;
 322 }
 323
 324 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
 325 static uint8_t reverse_bit(uint8_t b)
 326 {
 327         b = (b & 0xf0) >> 4 | (b & 0x0f) << 4;
 328         b = (b & 0xcc) >> 2 | (b & 0x33) << 2;
 329         b = (b & 0xaa) >> 1 | (b & 0x55) << 1;
 330
 331         return b;
 332 }
 333
 334 static void encode_bch_ecc(void *buf, struct fcb_block *fcb, int eccbits)
 335 {
 336         int i, j, m = 13;
 337         int blocksize = 128;
 338         int numblocks = 8;
 339         int ecc_buf_size = (m * eccbits + 7) / 8;
 340         struct bch_control *bch = init_bch(m, eccbits, 0);
 341         u8 *ecc_buf = kzalloc(ecc_buf_size, GFP_KERNEL);
 342         u8 *tmp_buf = kzalloc(blocksize * numblocks, GFP_KERNEL);
 343         u8 *psrc, *pdst;
 344
 345         /*
 346          * The blocks here are bit aligned. If eccbits is a multiple of 8,
 347          * we just can copy bytes. Otherwiese we must move the blocks to
 348          * the next free bit position.
 349          */
 350         WARN_ON(eccbits % 8);
 351
 352         memcpy(tmp_buf, fcb, sizeof(*fcb));
 353
 354         for (i = 0; i < numblocks; i++) {
 355                 memset(ecc_buf, 0, ecc_buf_size);
 356                 psrc = tmp_buf + i * blocksize;
 357                 pdst = buf + i * (blocksize + ecc_buf_size);
 358
 359                 /* copy data byte aligned to destination buf */
 360                 memcpy(pdst, psrc, blocksize);
 361
 362                 /*
 363                  * imx-kobs use a modified encode_bch which reverse the
 364                  * bit order of the data before calculating bch.
 365                  * Do this in the buffer and use the bch lib here.
 366                  */
 367                 for (j = 0; j < blocksize; j++)
 368                         psrc[j] = reverse_bit(psrc[j]);
 369
 370                 encode_bch(bch, psrc, blocksize, ecc_buf);
 371
 372                 /* reverse ecc bit */
 373                 for (j = 0; j < ecc_buf_size; j++)
 374                         ecc_buf[j] = reverse_bit(ecc_buf[j]);
 375
 376                 /* Here eccbuf is byte aligned and we can just copy it */
 377                 memcpy(pdst + blocksize, ecc_buf, ecc_buf_size);
 378         }
 379
 380         kfree(ecc_buf);
 381         kfree(tmp_buf);
 382         free_bch(bch);
 383 }
 384 #else
 385
 386 static u8 calculate_parity_13_8(u8 d)
 387 {
 388         u8 p = 0;
 389
 390         p |= (GETBIT(d, 6) ^ GETBIT(d, 5) ^ GETBIT(d, 3) ^ GETBIT(d, 2)) << 0;
 391         p |= (GETBIT(d, 7) ^ GETBIT(d, 5) ^ GETBIT(d, 4) ^ GETBIT(d, 2) ^
 392               GETBIT(d, 1)) << 1;
 393         p |= (GETBIT(d, 7) ^ GETBIT(d, 6) ^ GETBIT(d, 5) ^ GETBIT(d, 1) ^
 394               GETBIT(d, 0)) << 2;
 395         p |= (GETBIT(d, 7) ^ GETBIT(d, 4) ^ GETBIT(d, 3) ^ GETBIT(d, 0)) << 3;
 396         p |= (GETBIT(d, 6) ^ GETBIT(d, 4) ^ GETBIT(d, 3) ^ GETBIT(d, 2) ^
 397               GETBIT(d, 1) ^ GETBIT(d, 0)) << 4;
 398
 399         return p;
 400 }
 401
 402 static void encode_hamming_13_8(void *_src, void *_ecc, size_t size)
 403 {
 404         int i;
 405         u8 *src = _src;
 406         u8 *ecc = _ecc;
 407
 408         for (i = 0; i < size; i++)
 409                 ecc[i] = calculate_parity_13_8(src[i]);
 410 }
 411 #endif
 412
 413 static u32 calc_chksum(void *buf, size_t size)
 414 {
 415         u32 chksum = 0;
 416         u8 *bp = buf;
 417         size_t i;
 418
 419         for (i = 0; i < size; i++)
 420                 chksum += bp[i];
 421
 422         return ~chksum;
 423 }
 424
 425 static void fill_fcb(struct fcb_block *fcb, struct boot_config *boot_cfg)
 426 {
 427         struct mtd_info *mtd = boot_cfg->mtd;
 428         struct nand_chip *chip = mtd_to_nand(mtd);
 429         struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
 430         struct mxs_nand_layout l;
 431
 432         mxs_nand_get_layout(mtd, &l);
 433
 434         fcb->fingerprint = FCB_FINGERPRINT;
 435         fcb->version = FCB_VERSION_1;
 436
 437         fcb->datasetup = 80;
 438         fcb->datahold = 60;
 439         fcb->addr_setup = 25;
 440         fcb->dsample_time = 6;
 441
 442         fcb->pagesize = mtd->writesize;
 443         fcb->oob_pagesize = mtd->writesize + mtd->oobsize;
 444         fcb->sectors = mtd->erasesize / mtd->writesize;
 445
 446         fcb->meta_size = l.meta_size;
 447         fcb->nr_blocks = l.nblocks;
 448         fcb->ecc_nr = l.data0_size;
 449         fcb->ecc_level = l.ecc0;
 450         fcb->ecc_size = l.datan_size;
 451         fcb->ecc_type = l.eccn;
 452         fcb->bchtype = l.gf_len;
 453
 454         /* DBBT search area starts from the next block after all FCB */
 455         fcb->dbbt_start = boot_cfg->search_area_size_in_pages;
 456
 457         fcb->bb_byte = nand_info->bch_geometry.block_mark_byte_offset;
 458         fcb->bb_start_bit = nand_info->bch_geometry.block_mark_bit_offset;
 459
 460         fcb->phy_offset = mtd->writesize;
 461
 462         fcb->disbbm = 0;
 463
 464         fcb->fw1_start = CONV_TO_PAGES(boot_cfg->boot_stream1_address);
 465         fcb->fw2_start = CONV_TO_PAGES(boot_cfg->boot_stream2_address);
 466         fcb->fw1_pages = CONV_TO_PAGES(boot_cfg->boot_stream1_size);
 467         fcb->fw2_pages = CONV_TO_PAGES(boot_cfg->boot_stream2_size);
 468
 469         fcb->checksum = calc_chksum((void *)fcb + 4, sizeof(*fcb) - 4);
 470 }
 471
 472 static int fill_dbbt_data(struct mtd_info *mtd, void *buf, int num_blocks)
 473 {
 474         int n, n_bad_blocks = 0;
 475         u32 *bb = buf + 0x8;
 476         u32 *n_bad_blocksp = buf + 0x4;
 477
 478         for (n = 0; n < num_blocks; n++) {
 479                 loff_t offset = n * mtd->erasesize;
 480                         if (mtd_block_isbad(mtd, offset)) {
 481                                 n_bad_blocks++;
 482                                 *bb = n;
 483                                 bb++;
 484                 }
 485         }
 486
 487         *n_bad_blocksp = n_bad_blocks;
 488
 489         return n_bad_blocks;
 490 }
 491
 492 /*
 493  * return 1     - bad block
 494  * return 0     - read successfully
 495  * return < 0   - read failed
 496  */
 497 static int read_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb,
 498                     loff_t off)
 499 {
 500         struct mtd_info *mtd;
 501         void *fcb_raw_page;
 502         size_t size;
 503         int ret = 0;
 504
 505         mtd = boot_cfg->mtd;
 506         fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
 507
 508         if (mtd_block_isbad(mtd, off)) {
 509                 printf("Block %d is bad, skipped\n", (int)CONV_TO_BLOCKS(off));
 510                 return 1;
 511         }
 512
 513         /*
 514          * User BCH hardware to decode ECC for FCB
 515          */
 516         if (plat_config.misc_flags & FCB_ENCODE_BCH) {
 517                 size = sizeof(struct fcb_block);
 518
 519                 /* switch nand BCH to FCB compatible settings */
 520                 if (plat_config.misc_flags & FCB_ENCODE_BCH_62b)
 521                         mxs_nand_mode_fcb_62bit(mtd);
 522                 else if (plat_config.misc_flags & FCB_ENCODE_BCH_40b)
 523                         mxs_nand_mode_fcb_40bit(mtd);
 524
 525                 ret = nand_read(mtd, off, &size, (u_char *)fcb);
 526
 527                 /* switch BCH back */
 528                 mxs_nand_mode_normal(mtd);
 529                 printf("NAND FCB read from 0x%llx offset 0x%zx read: %s\n",
 530                        off, size, ret ? "ERROR" : "OK");
 531
 532         } else if (plat_config.misc_flags & FCB_ENCODE_HAMMING) {
 533                 /* raw read*/
 534                 mtd_oob_ops_t ops = {
 535                         .datbuf = (u8 *)fcb_raw_page,
 536                         .oobbuf = ((u8 *)fcb_raw_page) + mtd->writesize,
 537                         .len = mtd->writesize,
 538                         .ooblen = mtd->oobsize,
 539                         .mode = MTD_OPS_RAW
 540                         };
 541
 542                 ret = mtd_read_oob(mtd, off, &ops);
 543                 printf("NAND FCB read from 0x%llx offset 0x%zx read: %s\n",
 544                        off, ops.len, ret ? "ERROR" : "OK");
 545         }
 546
 547         if (ret)
 548                 goto fcb_raw_page_err;
 549
 550         if ((plat_config.misc_flags & FCB_ENCODE_HAMMING) &&
 551             (plat_config.misc_flags & FCB_LAYOUT_RESV_12B))
 552                 memcpy(fcb, fcb_raw_page + 12, sizeof(struct fcb_block));
 553
 554 /* TODO: check if it can pass Hamming check */
 555
 556 fcb_raw_page_err:
 557         kfree(fcb_raw_page);
 558
 559         return ret;
 560 }
 561
 562 static int write_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb)
 563 {
 564         struct mtd_info *mtd;
 565         void *fcb_raw_page = NULL;
 566         int i, ret;
 567         loff_t off;
 568         size_t size;
 569
 570         mtd = boot_cfg->mtd;
 571
 572         /*
 573          * We prepare raw page only for i.MX6, for i.MX7 we
 574          * leverage BCH hw module instead
 575          */
 576         if ((plat_config.misc_flags & FCB_ENCODE_HAMMING) &&
 577             (plat_config.misc_flags & FCB_LAYOUT_RESV_12B)) {
 578                 fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize,
 579                                        GFP_KERNEL);
 580                 if (!fcb_raw_page) {
 581                         debug("failed to allocate fcb_raw_page\n");
 582                         ret = -ENOMEM;
 583                         return ret;
 584                 }
 585
 586 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
 587                 /* 40 bit BCH, for i.MX6UL(L) */
 588                 encode_bch_ecc(fcb_raw_page + 32, fcb, 40);
 589 #else
 590                 memcpy(fcb_raw_page + 12, fcb, sizeof(struct fcb_block));
 591                 encode_hamming_13_8(fcb_raw_page + 12,
 592                                     fcb_raw_page + 12 + 512, 512);
 593 #endif
 594                 /*
 595                  * Set the first and second byte of OOB data to 0xFF,
 596                  * not 0x00. These bytes are used as the Manufacturers Bad
 597                  * Block Marker (MBBM). Since the FCB is mostly written to
 598                  * the first page in a block, a scan for
 599                  * factory bad blocks will detect these blocks as bad, e.g.
 600                  * when function nand_scan_bbt() is executed to build a new
 601                  * bad block table.
 602                  */
 603                 memset(fcb_raw_page + mtd->writesize, 0xFF, 2);
 604         }
 605
 606         /* start writing FCB from the very beginning */
 607         off = 0;
 608
 609         for (i = 0; i < g_boot_search_count; i++) {
 610                 if (mtd_block_isbad(mtd, off)) {
 611                         printf("Block %d is bad, skipped\n", i);
 612                         continue;
 613                 }
 614
 615                 /*
 616                  * User BCH hardware module to generate ECC for FCB
 617                  */
 618                 if (plat_config.misc_flags & FCB_ENCODE_BCH) {
 619                         size = sizeof(struct fcb_block);
 620
 621                         /* switch nand BCH to FCB compatible settings */
 622                         if (plat_config.misc_flags & FCB_ENCODE_BCH_62b)
 623                                 mxs_nand_mode_fcb_62bit(mtd);
 624                         else if (plat_config.misc_flags & FCB_ENCODE_BCH_40b)
 625                                 mxs_nand_mode_fcb_40bit(mtd);
 626
 627                         ret = nand_write(mtd, off, &size, (u_char *)fcb);
 628
 629                         /* switch BCH back */
 630                         mxs_nand_mode_normal(mtd);
 631                         printf("NAND FCB write to 0x%zx offset 0x%llx written: %s\n",
 632                                size, off, ret ? "ERROR" : "OK");
 633
 634                 } else if (plat_config.misc_flags & FCB_ENCODE_HAMMING) {
 635                         /* raw write */
 636                         mtd_oob_ops_t ops = {
 637                                 .datbuf = (u8 *)fcb_raw_page,
 638                                 .oobbuf = ((u8 *)fcb_raw_page) +
 639                                           mtd->writesize,
 640                                 .len = mtd->writesize,
 641                                 .ooblen = mtd->oobsize,
 642                                 .mode = MTD_OPS_RAW
 643                         };
 644
 645                         ret = mtd_write_oob(mtd, off, &ops);
 646                         printf("NAND FCB write to 0x%llxx offset 0x%zx written: %s\n", off, ops.len, ret ? "ERROR" : "OK");
 647                 }
 648
 649                 if (ret)
 650                         goto fcb_raw_page_err;
 651
 652                 /* next writing location */
 653                 off += g_boot_search_stride;
 654         }
 655
 656         return 0;
 657
 658 fcb_raw_page_err:
 659         kfree(fcb_raw_page);
 660
 661         return ret;
 662 }
 663
 664 /*
 665  * return 1     - bad block
 666  * return 0     - read successfully
 667  * return < 0   - read failed
 668  */
 669 static int read_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
 670                       void *dbbt_data_page, loff_t off)
 671 {
 672         size_t size;
 673         struct mtd_info *mtd;
 674         loff_t to;
 675         int ret;
 676
 677         mtd = boot_cfg->mtd;
 678
 679         if (mtd_block_isbad(mtd, off)) {
 680                 printf("Block %d is bad, skipped\n",
 681                        (int)CONV_TO_BLOCKS(off));
 682                 return 1;
 683         }
 684
 685         size = sizeof(struct dbbt_block);
 686         ret = nand_read(mtd, off, &size, (u_char *)dbbt);
 687         printf("NAND DBBT read from 0x%llx offset 0x%zx read: %s\n",
 688                off, size, ret ? "ERROR" : "OK");
 689         if (ret)
 690                 return ret;
 691
 692         /* dbbtpages == 0 if no bad blocks */
 693         if (dbbt->dbbtpages > 0) {
 694                 to = off + 4 * mtd->writesize;
 695                 size = mtd->writesize;
 696                 ret = nand_read(mtd, to, &size, dbbt_data_page);
 697                 printf("DBBT data read from 0x%llx offset 0x%zx read: %s\n",
 698                        to, size, ret ? "ERROR" : "OK");
 699
 700                 if (ret)
 701                         return ret;
 702         }
 703
 704         return 0;
 705 }
 706
 707 static int write_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
 708                       void *dbbt_data_page)
 709 {
 710         int i;
 711         loff_t off, to;
 712         size_t size;
 713         struct mtd_info *mtd;
 714         int ret;
 715
 716         mtd = boot_cfg->mtd;
 717
 718         /* start writing DBBT after all FCBs */
 719         off = boot_cfg->search_area_size_in_bytes;
 720         size = mtd->writesize;
 721
 722         for (i = 0; i < g_boot_search_count; i++) {
 723                 if (mtd_block_isbad(mtd, off)) {
 724                         printf("Block %d is bad, skipped\n",
 725                                (int)(i + CONV_TO_BLOCKS(off)));
 726                         continue;
 727                 }
 728
 729                 ret = nand_write(mtd, off, &size, (u_char *)dbbt);
 730                 printf("NAND DBBT write to 0x%llx offset 0x%zx written: %s\n",
 731                        off, size, ret ? "ERROR" : "OK");
 732                 if (ret)
 733                         return ret;
 734
 735                 /* dbbtpages == 0 if no bad blocks */
 736                 if (dbbt->dbbtpages > 0) {
 737                         to = off + 4 * mtd->writesize;
 738                         ret = nand_write(mtd, to, &size, dbbt_data_page);
 739                         printf("DBBT data write to 0x%llx offset 0x%zx written: %s\n",
 740                                to, size, ret ? "ERROR" : "OK");
 741
 742                 if (ret)
 743                         return ret;
 744                 }
 745
 746                 /* next writing location */
 747                 off += g_boot_search_stride;
 748         }
 749
 750         return 0;
 751 }
 752
 753 /* reuse the check_skip_len from nand_util.c with minor change*/
 754 static int check_skip_length(struct boot_config *boot_cfg, loff_t offset,
 755                              size_t length, size_t *used)
 756 {
 757         struct mtd_info *mtd = boot_cfg->mtd;
 758         size_t maxsize = boot_cfg->maxsize;
 759         size_t len_excl_bad = 0;
 760         int ret = 0;
 761
 762         while (len_excl_bad < length) {
 763                 size_t block_len, block_off;
 764                 loff_t block_start;
 765
 766                 if (offset >= maxsize)
 767                         return -1;
 768
 769                 block_start = offset & ~(loff_t)(mtd->erasesize - 1);
 770                 block_off = offset & (mtd->erasesize - 1);
 771                 block_len = mtd->erasesize - block_off;
 772
 773                 if (!nand_block_isbad(mtd, block_start))
 774                         len_excl_bad += block_len;
 775                 else
 776                         ret = 1;
 777
 778                 offset += block_len;
 779                 *used += block_len;
 780         }
 781
 782         /* If the length is not a multiple of block_len, adjust. */
 783         if (len_excl_bad > length)
 784                 *used -= (len_excl_bad - length);
 785
 786         return ret;
 787 }
 788
 789 static int nandbcb_get_next_good_blk_addr(struct boot_config *boot_cfg,
 790                                           struct boot_stream_config *bs_cfg)
 791 {
 792         struct mtd_info *mtd = boot_cfg->mtd;
 793         loff_t offset = bs_cfg->bs_addr;
 794         size_t length = bs_cfg->bs_size;
 795         size_t used = 0;
 796         int ret;
 797
 798         ret = check_skip_length(boot_cfg, offset, length, &used);
 799
 800         if (ret < 0)
 801                 return ret;
 802
 803         /* get next image address */
 804         bs_cfg->next_bs_addr = (u32)(offset + used + mtd->erasesize - 1)
 805                                  / (u32)mtd->erasesize * mtd->erasesize;
 806
 807         return ret;
 808 }
 809
 810 static int nandbcb_write_bs_skip_bad(struct boot_config *boot_cfg,
 811                                      struct boot_stream_config *bs_cfg)
 812 {
 813         struct mtd_info *mtd;
 814         void *buf;
 815         loff_t offset, maxsize;
 816         size_t size;
 817         size_t length;
 818         int ret;
 819         bool padding_flag = false;
 820
 821         mtd = boot_cfg->mtd;
 822         offset = bs_cfg->bs_addr;
 823         maxsize = boot_cfg->maxsize;
 824         size = bs_cfg->bs_size;
 825
 826         /* some boot images may need leading offset */
 827         if (bs_cfg->need_padding &&
 828             (plat_config.misc_flags & FIRMWARE_NEED_PADDING))
 829                 padding_flag = 1;
 830
 831         if (padding_flag)
 832                 length = ALIGN(size + FLASH_OFFSET_STANDARD, mtd->writesize);
 833         else
 834                 length = ALIGN(size, mtd->writesize);
 835
 836         buf = kzalloc(length, GFP_KERNEL);
 837         if (!buf) {
 838                 printf("failed to allocate buffer for firmware\n");
 839                 ret = -ENOMEM;
 840                 return ret;
 841         }
 842
 843         if (padding_flag)
 844                 memcpy(buf + FLASH_OFFSET_STANDARD, bs_cfg->bs_buf, size);
 845         else
 846                 memcpy(buf, bs_cfg->bs_buf, size);
 847
 848         ret = nand_write_skip_bad(mtd, offset, &length, NULL, maxsize,
 849                                   (u_char *)buf, WITH_WR_VERIFY);
 850         printf("Write %s @0x%llx offset, 0x%zx bytes written: %s\n",
 851                bs_cfg->bs_label, offset, length, ret ? "ERROR" : "OK");
 852
 853         if (ret)
 854                 /* write image failed, quit */
 855                 goto err;
 856
 857         /* get next good blk address if needed */
 858         if (bs_cfg->need_padding) {
 859                 ret = nandbcb_get_next_good_blk_addr(boot_cfg, bs_cfg);
 860                 if (ret < 0) {
 861                         printf("Next image cannot fit in NAND partition\n");
 862                         goto err;
 863                 }
 864         }
 865
 866         /* now we know how the exact image size written to NAND */
 867         bs_cfg->bs_size = length;
 868         return 0;
 869 err:
 870         kfree(buf);
 871         return ret;
 872 }
 873
 874 static int nandbcb_write_fw(struct boot_config *boot_cfg, u_char *buf,
 875                             int index)
 876 {
 877         int i;
 878         loff_t offset;
 879         size_t size;
 880         loff_t next_bs_addr;
 881         struct boot_stream_config bs_cfg;
 882         int ret;
 883
 884         for (i = 0; i < 2; ++i) {
 885                 if (!(FW_INX(i) & index))
 886                         continue;
 887
 888                 if (i == 0) {
 889                         offset = boot_cfg->boot_stream1_address;
 890                         size = boot_cfg->boot_stream1_size;
 891                 } else {
 892                         offset = boot_cfg->boot_stream2_address;
 893                         size = boot_cfg->boot_stream2_size;
 894                 }
 895
 896                 /* write Firmware*/
 897                 if (!(plat_config.misc_flags & FIRMWARE_EXTRA_ONE)) {
 898                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 899                         sprintf(bs_cfg.bs_label, "firmware%d", i);
 900                         bs_cfg.bs_addr = offset;
 901                         bs_cfg.bs_size = size;
 902                         bs_cfg.bs_buf = buf;
 903                         bs_cfg.need_padding = 1;
 904
 905                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 906                         if (ret)
 907                                 return ret;
 908
 909                         /* update the boot stream size */
 910                         if (i == 0)
 911                                 boot_cfg->boot_stream1_size = bs_cfg.bs_size;
 912                         else
 913                                 boot_cfg->boot_stream2_size = bs_cfg.bs_size;
 914
 915                 } else {
 916                 /* some platforms need extra firmware */
 917                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 918                         sprintf(bs_cfg.bs_label, "fw%d_part%d", i, 1);
 919                         bs_cfg.bs_addr = offset;
 920                         bs_cfg.bs_size = IMX8MQ_HDMI_FW_SZ;
 921                         bs_cfg.bs_buf = buf;
 922                         bs_cfg.need_padding = 1;
 923
 924                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 925                         if (ret)
 926                                 return ret;
 927
 928                         /* update the boot stream size */
 929                         if (i == 0)
 930                                 boot_cfg->boot_stream1_size = bs_cfg.bs_size;
 931                         else
 932                                 boot_cfg->boot_stream2_size = bs_cfg.bs_size;
 933
 934                         /* get next image address */
 935                         next_bs_addr = bs_cfg.next_bs_addr;
 936
 937                         memset(&bs_cfg, 0, sizeof(struct boot_stream_config));
 938                         sprintf(bs_cfg.bs_label, "fw%d_part%d", i, 2);
 939                         bs_cfg.bs_addr = next_bs_addr;
 940                         bs_cfg.bs_size = IMX8MQ_SPL_SZ;
 941                         bs_cfg.bs_buf = (u_char *)(buf + IMX8MQ_HDMI_FW_SZ);
 942                         bs_cfg.need_padding = 0;
 943
 944                         ret = nandbcb_write_bs_skip_bad(boot_cfg, &bs_cfg);
 945                         if (ret)
 946                                 return ret;
 947                 }
 948         }
 949
 950         return 0;
 951 }
 952
 953 static int nandbcb_init(struct boot_config *boot_cfg, u_char *buf)
 954 {
 955         struct mtd_info *mtd;
 956         nand_erase_options_t opts;
 957         struct fcb_block *fcb;
 958         struct dbbt_block *dbbt;
 959         void *dbbt_page, *dbbt_data_page;
 960         int ret;
 961         loff_t maxsize, off;
 962
 963         mtd = boot_cfg->mtd;
 964         maxsize = boot_cfg->maxsize;
 965         off = boot_cfg->offset;
 966
 967         /* erase */
 968         memset(&opts, 0, sizeof(opts));
 969         opts.offset = off;
 970         opts.length = maxsize - 1;
 971         ret = nand_erase_opts(mtd, &opts);
 972         if (ret) {
 973                 printf("%s: erase failed (ret = %d)\n", __func__, ret);
 974                 return ret;
 975         }
 976
 977         /*
 978          * Reference documentation from i.MX6DQRM section 8.5.2.2
 979          *
 980          * Nand Boot Control Block(BCB) contains two data structures,
 981          * - Firmware Configuration Block(FCB)
 982          * - Discovered Bad Block Table(DBBT)
 983          *
 984          * FCB contains,
 985          * - nand timings
 986          * - DBBT search page address,
 987          * - start page address of primary firmware
 988          * - start page address of secondary firmware
 989          *
 990          * setup fcb:
 991          * - number of blocks = mtd partition size / mtd erasesize
 992          * - two firmware blocks, primary and secondary
 993          * - first 4 block for FCB/DBBT
 994          * - rest split in half for primary and secondary firmware
 995          * - same firmware write twice
 996          */
 997
 998         /* write Firmware*/
 999         ret = nandbcb_write_fw(boot_cfg, buf, FW_ALL);
1000         if (ret)
1001                 goto err;
1002
1003         /* fill fcb */
1004         fcb = kzalloc(sizeof(*fcb), GFP_KERNEL);
1005         if (!fcb) {
1006                 debug("failed to allocate fcb\n");
1007                 ret = -ENOMEM;
1008                 return ret;
1009         }
1010         fill_fcb(fcb, boot_cfg);
1011
1012         ret = write_fcb(boot_cfg, fcb);
1013
1014         /* fill dbbt */
1015         dbbt_page = kzalloc(mtd->writesize, GFP_KERNEL);
1016         if (!dbbt_page) {
1017                 debug("failed to allocate dbbt_page\n");
1018                 ret = -ENOMEM;
1019                 goto fcb_err;
1020         }
1021
1022         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1023         if (!dbbt_data_page) {
1024                 debug("failed to allocate dbbt_data_page\n");
1025                 ret = -ENOMEM;
1026                 goto dbbt_page_err;
1027         }
1028
1029         dbbt = dbbt_page;
1030         dbbt->checksum = 0;
1031         dbbt->fingerprint = DBBT_FINGERPRINT;
1032         dbbt->version = DBBT_VERSION_1;
1033         ret = fill_dbbt_data(mtd, dbbt_data_page, CONV_TO_BLOCKS(maxsize));
1034         if (ret < 0)
1035                 goto dbbt_data_page_err;
1036         else if (ret > 0)
1037                 dbbt->dbbtpages = 1;
1038
1039         /* write dbbt */
1040         ret = write_dbbt(boot_cfg, dbbt, dbbt_data_page);
1041         if (ret < 0)
1042                 printf("failed to write FCB/DBBT\n");
1043
1044 dbbt_data_page_err:
1045         kfree(dbbt_data_page);
1046 dbbt_page_err:
1047         kfree(dbbt_page);
1048 fcb_err:
1049         kfree(fcb);
1050 err:
1051         return ret;
1052 }
1053
1054 static int do_nandbcb_bcbonly(int argc, char *const argv[])
1055 {
1056         struct fcb_block *fcb;
1057         struct dbbt_block *dbbt;
1058         struct mtd_info *mtd;
1059         nand_erase_options_t opts;
1060         size_t maxsize;
1061         loff_t off;
1062         void *dbbt_page, *dbbt_data_page;
1063         int ret;
1064         struct boot_config cfg;
1065
1066         if (argc < 4)
1067                 return CMD_RET_USAGE;
1068
1069         memset(&cfg, 0, sizeof(struct boot_config));
1070         if (nandbcb_get_info(argc, argv, &cfg))
1071                 return CMD_RET_FAILURE;
1072
1073         /* only get the partition info */
1074         if (nandbcb_get_size(2, argv, 1, &cfg))
1075                 return CMD_RET_FAILURE;
1076
1077         if (nandbcb_set_boot_config(argc, argv, &cfg))
1078                 return CMD_RET_FAILURE;
1079
1080         mtd = cfg.mtd;
1081
1082         cfg.boot_stream1_address = simple_strtoul(argv[2], NULL, 16);
1083         cfg.boot_stream1_size = simple_strtoul(argv[3], NULL, 16);
1084         cfg.boot_stream1_size = ALIGN(cfg.boot_stream1_size, mtd->writesize);
1085
1086         if (argc > 5) {
1087                 cfg.boot_stream2_address = simple_strtoul(argv[4], NULL, 16);
1088                 cfg.boot_stream2_size = simple_strtoul(argv[5], NULL, 16);
1089                 cfg.boot_stream2_size = ALIGN(cfg.boot_stream2_size,
1090                                               mtd->writesize);
1091         }
1092
1093         /* sanity check */
1094         nandbcb_check_space(&cfg);
1095
1096         maxsize = cfg.maxsize;
1097         off = cfg.offset;
1098
1099         /* erase the previous FCB/DBBT */
1100         memset(&opts, 0, sizeof(opts));
1101         opts.offset = off;
1102         opts.length = g_boot_search_stride * 2;
1103         ret = nand_erase_opts(mtd, &opts);
1104         if (ret) {
1105                 printf("%s: erase failed (ret = %d)\n", __func__, ret);
1106                 return CMD_RET_FAILURE;
1107         }
1108
1109         /* fill fcb */
1110         fcb = kzalloc(sizeof(*fcb), GFP_KERNEL);
1111         if (!fcb) {
1112                 printf("failed to allocate fcb\n");
1113                 ret = -ENOMEM;
1114                 return CMD_RET_FAILURE;
1115         }
1116
1117         fill_fcb(fcb, &cfg);
1118
1119         /* write fcb */
1120         ret = write_fcb(&cfg, fcb);
1121
1122         /* fill dbbt */
1123         dbbt_page = kzalloc(mtd->writesize, GFP_KERNEL);
1124         if (!dbbt_page) {
1125                 printf("failed to allocate dbbt_page\n");
1126                 ret = -ENOMEM;
1127                 goto fcb_err;
1128         }
1129
1130         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1131         if (!dbbt_data_page) {
1132                 printf("failed to allocate dbbt_data_page\n");
1133                 ret = -ENOMEM;
1134                 goto dbbt_page_err;
1135         }
1136
1137         dbbt = dbbt_page;
1138         dbbt->checksum = 0;
1139         dbbt->fingerprint = DBBT_FINGERPRINT;
1140         dbbt->version = DBBT_VERSION_1;
1141         ret = fill_dbbt_data(mtd, dbbt_data_page, CONV_TO_BLOCKS(maxsize));
1142         if (ret < 0)
1143                 goto dbbt_data_page_err;
1144         else if (ret > 0)
1145                 dbbt->dbbtpages = 1;
1146
1147         /* write dbbt */
1148         ret = write_dbbt(&cfg, dbbt, dbbt_data_page);
1149
1150 dbbt_data_page_err:
1151         kfree(dbbt_data_page);
1152 dbbt_page_err:
1153         kfree(dbbt_page);
1154 fcb_err:
1155         kfree(fcb);
1156
1157         if (ret < 0) {
1158                 printf("failed to write FCB/DBBT\n");
1159                 return CMD_RET_FAILURE;
1160         }
1161
1162         return CMD_RET_SUCCESS;
1163 }
1164
1165 /* dump data which is read from NAND chip */
1166 void dump_structure(struct boot_config *boot_cfg, struct fcb_block *fcb,
1167                     struct dbbt_block *dbbt, void *dbbt_data_page)
1168 {
1169         int i;
1170         struct mtd_info *mtd = boot_cfg->mtd;
1171
1172         #define P1(x) printf("  %s = 0x%08x\n", #x, fcb->x)
1173                 printf("FCB\n");
1174                 P1(checksum);
1175                 P1(fingerprint);
1176                 P1(version);
1177         #undef P1
1178         #define P1(x)   printf("  %s = %d\n", #x, fcb->x)
1179                 P1(datasetup);
1180                 P1(datahold);
1181                 P1(addr_setup);
1182                 P1(dsample_time);
1183                 P1(pagesize);
1184                 P1(oob_pagesize);
1185                 P1(sectors);
1186                 P1(nr_nand);
1187                 P1(nr_die);
1188                 P1(celltype);
1189                 P1(ecc_type);
1190                 P1(ecc_nr);
1191                 P1(ecc_size);
1192                 P1(ecc_level);
1193                 P1(meta_size);
1194                 P1(nr_blocks);
1195                 P1(ecc_type_sdk);
1196                 P1(ecc_nr_sdk);
1197                 P1(ecc_size_sdk);
1198                 P1(ecc_level_sdk);
1199                 P1(nr_blocks_sdk);
1200                 P1(meta_size_sdk);
1201                 P1(erase_th);
1202                 P1(bootpatch);
1203                 P1(patch_size);
1204                 P1(fw1_start);
1205                 P1(fw2_start);
1206                 P1(fw1_pages);
1207                 P1(fw2_pages);
1208                 P1(dbbt_start);
1209                 P1(bb_byte);
1210                 P1(bb_start_bit);
1211                 P1(phy_offset);
1212                 P1(bchtype);
1213                 P1(readlatency);
1214                 P1(predelay);
1215                 P1(cedelay);
1216                 P1(postdelay);
1217                 P1(cmdaddpause);
1218                 P1(datapause);
1219                 P1(tmspeed);
1220                 P1(busytimeout);
1221                 P1(disbbm);
1222                 P1(spare_offset);
1223 #if !defined(CONFIG_MX6) || defined(CONFIG_MX6SX) || \
1224         defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
1225                 P1(onfi_sync_enable);
1226                 P1(onfi_sync_speed);
1227                 P1(onfi_sync_nand_data);
1228                 P1(disbbm_search);
1229                 P1(disbbm_search_limit);
1230                 P1(read_retry_enable);
1231 #endif
1232         #undef P1
1233         #define P1(x)   printf("  %s = 0x%08x\n", #x, dbbt->x)
1234                 printf("DBBT :\n");
1235                 P1(checksum);
1236                 P1(fingerprint);
1237                 P1(version);
1238         #undef P1
1239         #define P1(x)   printf("  %s = %d\n", #x, dbbt->x)
1240                 P1(dbbtpages);
1241         #undef P1
1242
1243         for (i = 0; i < dbbt->dbbtpages; ++i)
1244                 printf("%d ", *((u32 *)(dbbt_data_page + i)));
1245
1246         if (!(plat_config.misc_flags & FIRMWARE_EXTRA_ONE)) {
1247                 printf("Firmware: image #0 @ 0x%x size 0x%x\n",
1248                        fcb->fw1_start, fcb->fw1_pages * mtd->writesize);
1249                 printf("Firmware: image #1 @ 0x%x size 0x%x\n",
1250                        fcb->fw2_start, fcb->fw2_pages * mtd->writesize);
1251         } else {
1252                 printf("Firmware: image #0 @ 0x%x size 0x%x\n",
1253                        fcb->fw1_start, fcb->fw1_pages * mtd->writesize);
1254                 printf("Firmware: image #1 @ 0x%x size 0x%x\n",
1255                        fcb->fw2_start, fcb->fw2_pages * mtd->writesize);
1256                 /* TODO: Add extra image information */
1257         }
1258 }
1259
1260 static bool check_fingerprint(void *data, int fingerprint)
1261 {
1262         int off = 4;
1263
1264         return (*(int *)(data + off) == fingerprint);
1265 }
1266
1267 static int fuse_to_search_count(u32 bank, u32 word, u32 mask, u32 off)
1268 {
1269         int err;
1270         u32 val;
1271         int ret;
1272
1273         /* by default, the boot search count from fuse should be 2 */
1274         err = fuse_read(bank, word, &val);
1275         if (err)
1276                 return 2;
1277
1278         val = (val & mask) >> off;
1279
1280         switch (val) {
1281                 case 0:
1282                         ret = 2;
1283                         break;
1284                 case 1:
1285                 case 2:
1286                 case 3:
1287                         ret = 1 << val;
1288                         break;
1289                 default:
1290                         ret = 2;
1291         }
1292
1293         return ret;
1294 }
1295
1296 static int nandbcb_dump(struct boot_config *boot_cfg)
1297 {
1298         int i;
1299         loff_t off;
1300         struct mtd_info *mtd = boot_cfg->mtd;
1301         struct fcb_block fcb, fcb_copy;
1302         struct dbbt_block dbbt, dbbt_copy;
1303         void *dbbt_data_page, *dbbt_data_page_copy;
1304         bool fcb_not_found, dbbt_not_found;
1305         int ret = 0;
1306
1307         dbbt_data_page = kzalloc(mtd->writesize, GFP_KERNEL);
1308         if (!dbbt_data_page) {
1309                 printf("failed to allocate dbbt_data_page\n");
1310                 ret = -ENOMEM;
1311                 return ret;
1312         }
1313
1314         dbbt_data_page_copy = kzalloc(mtd->writesize, GFP_KERNEL);
1315         if (!dbbt_data_page_copy) {
1316                 printf("failed to allocate dbbt_data_page\n");
1317                 ret = -ENOMEM;
1318                 goto dbbt_page_err;
1319         }
1320
1321         /* read fcb */
1322         fcb_not_found = 1;
1323         off = 0;
1324         for (i = 0; i < g_boot_search_count; ++i) {
1325                 if (fcb_not_found) {
1326                         ret = read_fcb(boot_cfg, &fcb, off);
1327
1328                         if (ret < 0)
1329                                 goto dbbt_page_copy_err;
1330                         else if (ret == 1)
1331                                 continue;
1332                         else if (ret == 0)
1333                                 if (check_fingerprint(&fcb, FCB_FINGERPRINT))
1334                                         fcb_not_found = 0;
1335                 } else {
1336                         ret = read_fcb(boot_cfg, &fcb_copy, off);
1337
1338                         if (ret < 0)
1339                                 goto dbbt_page_copy_err;
1340                         if (memcmp(&fcb, &fcb_copy,
1341                                    sizeof(struct fcb_block))) {
1342                                 printf("FCB copies are not identical\n");
1343                                 ret = -EINVAL;
1344                                 goto dbbt_page_copy_err;
1345                         }
1346                 }
1347
1348                 /* next read location */
1349                 off += g_boot_search_stride;
1350         }
1351
1352         /* read dbbt*/
1353         dbbt_not_found = 1;
1354         off = boot_cfg->search_area_size_in_bytes;
1355         for (i = 0; i < g_boot_search_count; ++i) {
1356                 if (dbbt_not_found) {
1357                         ret = read_dbbt(boot_cfg, &dbbt, dbbt_data_page, off);
1358
1359                         if (ret < 0)
1360                                 goto dbbt_page_copy_err;
1361                         else if (ret == 1)
1362                                 continue;
1363                         else if (ret == 0)
1364                                 if (check_fingerprint(&dbbt, DBBT_FINGERPRINT))
1365                                         dbbt_not_found = 0;
1366                 } else {
1367                         ret = read_dbbt(boot_cfg, &dbbt_copy,
1368                                         dbbt_data_page_copy, off);
1369
1370                         if (ret < 0)
1371                                 goto dbbt_page_copy_err;
1372                         if (memcmp(&dbbt, &dbbt_copy,
1373                                    sizeof(struct dbbt_block))) {
1374                                 printf("DBBT copies are not identical\n");
1375                                 ret = -EINVAL;
1376                                 goto dbbt_page_copy_err;
1377                         }
1378                         if (dbbt.dbbtpages > 0 &&
1379                             memcmp(dbbt_data_page, dbbt_data_page_copy,
1380                                    mtd->writesize)) {
1381                                 printf("DBBT data copies are not identical\n");
1382                                 ret = -EINVAL;
1383                                 goto dbbt_page_copy_err;
1384                         }
1385                 }
1386
1387                 /* next read location */
1388                 off += g_boot_search_stride;
1389         }
1390
1391         dump_structure(boot_cfg, &fcb, &dbbt, dbbt_data_page);
1392
1393 dbbt_page_copy_err:
1394         kfree(dbbt_data_page_copy);
1395 dbbt_page_err:
1396         kfree(dbbt_data_page);
1397
1398         return ret;
1399 }
1400
1401 static int do_nandbcb_dump(int argc, char * const argv[])
1402 {
1403         struct boot_config cfg;
1404         int ret;
1405
1406         if (argc != 2)
1407                 return CMD_RET_USAGE;
1408
1409         memset(&cfg, 0, sizeof(struct boot_config));
1410         if (nandbcb_get_info(argc, argv, &cfg))
1411                 return CMD_RET_FAILURE;
1412
1413         if (nandbcb_get_size(argc, argv, 1, &cfg))
1414                 return CMD_RET_FAILURE;
1415
1416         if (nandbcb_set_boot_config(argc, argv, &cfg))
1417                 return CMD_RET_FAILURE;
1418
1419         ret = nandbcb_dump(&cfg);
1420         if (ret)
1421                 return ret;
1422
1423         return ret;
1424 }
1425
1426 static int do_nandbcb_init(int argc, char * const argv[])
1427 {
1428         u_char *buf;
1429         size_t size;
1430         loff_t addr;
1431         char *endp;
1432         int ret;
1433         struct boot_config cfg;
1434
1435         if (argc != 4)
1436                 return CMD_RET_USAGE;
1437
1438         memset(&cfg, 0, sizeof(struct boot_config));
1439         if (nandbcb_get_info(argc, argv, &cfg))
1440                 return CMD_RET_FAILURE;
1441
1442         if (nandbcb_get_size(argc, argv, 2, &cfg))
1443                 return CMD_RET_FAILURE;
1444         size = cfg.boot_stream1_size;
1445
1446         if (nandbcb_set_boot_config(argc, argv, &cfg))
1447                 return CMD_RET_FAILURE;
1448
1449         addr = simple_strtoul(argv[1], &endp, 16);
1450         if (*argv[1] == 0 || *endp != 0)
1451                 return CMD_RET_FAILURE;
1452
1453         buf = map_physmem(addr, size, MAP_WRBACK);
1454         if (!buf) {
1455                 puts("failed to map physical memory\n");
1456                 return CMD_RET_FAILURE;
1457         }
1458
1459         ret = nandbcb_init(&cfg, buf);
1460
1461         return ret == 0 ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
1462 }
1463
1464 static int do_nandbcb(struct cmd_tbl *cmdtp, int flag, int argc,
1465                       char *const argv[])
1466 {
1467         const char *cmd;
1468         int ret = 0;
1469
1470         if (argc < 3)
1471                 goto usage;
1472
1473         /* check the platform config first */
1474         if (is_mx6sx()) {
1475                 plat_config = imx6sx_plat_config;
1476         } else if (is_mx7()) {
1477                 plat_config = imx7d_plat_config;
1478         } else if (is_mx6ul() || is_mx6ull()) {
1479                 plat_config = imx6ul_plat_config;
1480         } else if (is_mx6() && !is_mx6sx() && !is_mx6ul() && !is_mx6ull()) {
1481                 plat_config = imx6qdl_plat_config;
1482         } else if (is_imx8mq()) {
1483                 plat_config = imx8mq_plat_config;
1484         } else if (is_imx8mm()) {
1485                 plat_config = imx8mm_plat_config;
1486         } else if (is_imx8mn()) {
1487                 plat_config = imx8mn_plat_config;
1488         } else if (is_imx8qm() || is_imx8qxp()) {
1489                 plat_config = imx8q_plat_config;
1490         } else {
1491                 printf("ERROR: Unknown platform\n");
1492                 return CMD_RET_FAILURE;
1493         }
1494
1495         if (plat_config.misc_flags & BT_SEARCH_CNT_FROM_FUSE) {
1496                 if (is_imx8qxp()) {
1497                         g_boot_search_count = fuse_to_search_count(0, 720,
1498                                                                    0xc0, 6);
1499                         printf("search count set to %d from fuse\n",
1500                                g_boot_search_count);
1501                 }
1502         }
1503
1504         cmd = argv[1];
1505         --argc;
1506         ++argv;
1507
1508         if (strcmp(cmd, "init") == 0) {
1509                 ret = do_nandbcb_init(argc, argv);
1510                 goto done;
1511         }
1512
1513         if (strcmp(cmd, "dump") == 0) {
1514                 ret = do_nandbcb_dump(argc, argv);
1515                 goto done;
1516         }
1517
1518         if (strcmp(cmd, "bcbonly") == 0) {
1519                 ret = do_nandbcb_bcbonly(argc, argv);
1520                 goto done;
1521         }
1522
1523 done:
1524         if (ret != -1)
1525                 return ret;
1526 usage:
1527         return CMD_RET_USAGE;
1528 }
1529
1530 #ifdef CONFIG_SYS_LONGHELP
1531 static char nandbcb_help_text[] =
1532         "init addr off|partition len - update 'len' bytes starting at\n"
1533         "       'off|part' to memory address 'addr', skipping  bad blocks\n"
1534         "nandbcb bcbonly off|partition fw1-off fw1-size [fw2-off fw2-size]\n"
1535         "           - write BCB only (FCB and DBBT)\n"
1536         "       where `fwx-size` is fw sizes in bytes, `fw1-off`\n"
1537         "       and `fw2-off` - firmware offsets\n"
1538         "       FIY, BCB isn't erased automatically, so mtd erase should\n"
1539         "       be called in advance before writing new BCB:\n"
1540         "           > mtd erase mx7-bcb\n"
1541         "nandbcb dump off|partition - dump/verify boot structures\n";
1542 #endif
1543
1544 U_BOOT_CMD(nandbcb, 7, 1, do_nandbcb,
1545            "i.MX NAND Boot Control Blocks write",
1546            nandbcb_help_text
1547 );