cmd/mvebu/bubt.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2016 Marvell International Ltd.
   4  * https://spdx.org/licenses
   5  */
   6
   7 #include <config.h>
   8 #include <common.h>
   9 #include <command.h>
  10 #include <env.h>
  11 #include <flash.h>
  12 #include <image.h>
  13 #include <net.h>
  14 #include <vsprintf.h>
  15 #include <errno.h>
  16 #include <dm.h>
  17
  18 #include <spi_flash.h>
  19 #include <spi.h>
  20 #include <nand.h>
  21 #include <usb.h>
  22 #include <fs.h>
  23 #include <mmc.h>
  24 #ifdef CONFIG_BLK
  25 #include <blk.h>
  26 #endif
  27 #include <u-boot/sha1.h>
  28 #include <u-boot/sha256.h>
  29
  30 #ifndef CONFIG_SYS_MMC_ENV_DEV
  31 #define CONFIG_SYS_MMC_ENV_DEV  0
  32 #endif
  33
  34 #if defined(CONFIG_ARMADA_8K)
  35 #define MAIN_HDR_MAGIC          0xB105B002
  36
  37 struct mvebu_image_header {
  38         u32     magic;                  /*  0-3  */
  39         u32     prolog_size;            /*  4-7  */
  40         u32     prolog_checksum;        /*  8-11 */
  41         u32     boot_image_size;        /* 12-15 */
  42         u32     boot_image_checksum;    /* 16-19 */
  43         u32     rsrvd0;                 /* 20-23 */
  44         u32     load_addr;              /* 24-27 */
  45         u32     exec_addr;              /* 28-31 */
  46         u8      uart_cfg;               /*  32   */
  47         u8      baudrate;               /*  33   */
  48         u8      ext_count;              /*  34   */
  49         u8      aux_flags;              /*  35   */
  50         u32     io_arg_0;               /* 36-39 */
  51         u32     io_arg_1;               /* 40-43 */
  52         u32     io_arg_2;               /* 43-47 */
  53         u32     io_arg_3;               /* 48-51 */
  54         u32     rsrvd1;                 /* 52-55 */
  55         u32     rsrvd2;                 /* 56-59 */
  56         u32     rsrvd3;                 /* 60-63 */
  57 };
  58 #elif defined(CONFIG_ARMADA_3700)       /* A3700 */
  59 #define HASH_SUM_LEN            16
  60 #define IMAGE_VERSION_3_6_0     0x030600
  61 #define IMAGE_VERSION_3_5_0     0x030500
  62
  63 struct common_tim_data {
  64         u32     version;
  65         u32     identifier;
  66         u32     trusted;
  67         u32     issue_date;
  68         u32     oem_unique_id;
  69         u32     reserved[5];            /* Reserve 20 bytes */
  70         u32     boot_flash_sign;
  71         u32     num_images;
  72         u32     num_keys;
  73         u32     size_of_reserved;
  74 };
  75
  76 struct mvebu_image_info {
  77         u32     image_id;
  78         u32     next_image_id;
  79         u32     flash_entry_addr;
  80         u32     load_addr;
  81         u32     image_size;
  82         u32     image_size_to_hash;
  83         u32     hash_algorithm_id;
  84         u32     hash[HASH_SUM_LEN];     /* Reserve 512 bits for the hash */
  85         u32     partition_number;
  86         u32     enc_algorithm_id;
  87         u32     encrypt_start_offset;
  88         u32     encrypt_size;
  89 };
  90 #endif
  91
  92 /* Structure of the main header, version 1 (Armada 370/38x/XP) */
  93 struct a38x_main_hdr_v1 {
  94         u8  blockid;               /* 0x0       */
  95         u8  flags;                 /* 0x1       */
  96         u16 reserved2;             /* 0x2-0x3   */
  97         u32 blocksize;             /* 0x4-0x7   */
  98         u8  version;               /* 0x8       */
  99         u8  headersz_msb;          /* 0x9       */
 100         u16 headersz_lsb;          /* 0xA-0xB   */
 101         u32 srcaddr;               /* 0xC-0xF   */
 102         u32 destaddr;              /* 0x10-0x13 */
 103         u32 execaddr;              /* 0x14-0x17 */
 104         u8  options;               /* 0x18      */
 105         u8  nandblocksize;         /* 0x19      */
 106         u8  nandbadblklocation;    /* 0x1A      */
 107         u8  reserved4;             /* 0x1B      */
 108         u16 reserved5;             /* 0x1C-0x1D */
 109         u8  ext;                   /* 0x1E      */
 110         u8  checksum;              /* 0x1F      */
 111 };
 112
 113 struct a38x_boot_mode {
 114         unsigned int id;
 115         const char *name;
 116 };
 117
 118 /* The blockid header field values used to indicate boot device of image */
 119 struct a38x_boot_mode a38x_boot_modes[] = {
 120         { 0x4D, "i2c"  },
 121         { 0x5A, "spi"  },
 122         { 0x69, "uart" },
 123         { 0x78, "sata" },
 124         { 0x8B, "nand" },
 125         { 0x9C, "pex"  },
 126         { 0xAE, "mmc"  },
 127         {},
 128 };
 129
 130 struct bubt_dev {
 131         char name[8];
 132         size_t (*read)(const char *file_name);
 133         int (*write)(size_t image_size);
 134         int (*active)(void);
 135 };
 136
 137 static ulong get_load_addr(void)
 138 {
 139         const char *addr_str;
 140         unsigned long addr;
 141
 142         addr_str = env_get("loadaddr");
 143         if (addr_str)
 144                 addr = simple_strtoul(addr_str, NULL, 16);
 145         else
 146                 addr = CONFIG_SYS_LOAD_ADDR;
 147
 148         return addr;
 149 }
 150
 151 /********************************************************************
 152  *     eMMC services
 153  ********************************************************************/
 154 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(MMC_WRITE)
 155 static int mmc_burn_image(size_t image_size)
 156 {
 157         struct mmc      *mmc;
 158         lbaint_t        start_lba;
 159         lbaint_t        blk_count;
 160         ulong           blk_written;
 161         int             err;
 162         const u8        mmc_dev_num = CONFIG_SYS_MMC_ENV_DEV;
 163 #ifdef CONFIG_BLK
 164         struct blk_desc *blk_desc;
 165 #endif
 166         mmc = find_mmc_device(mmc_dev_num);
 167         if (!mmc) {
 168                 printf("No SD/MMC/eMMC card found\n");
 169                 return -ENOMEDIUM;
 170         }
 171
 172         err = mmc_init(mmc);
 173         if (err) {
 174                 printf("%s(%d) init failed\n", IS_SD(mmc) ? "SD" : "MMC",
 175                        mmc_dev_num);
 176                 return err;
 177         }
 178
 179         /* SD reserves LBA-0 for MBR and boots from LBA-1,
 180          * MMC/eMMC boots from LBA-0
 181          */
 182         start_lba = IS_SD(mmc) ? 1 : 0;
 183 #ifdef CONFIG_BLK
 184         blk_count = image_size / mmc->write_bl_len;
 185         if (image_size % mmc->write_bl_len)
 186                 blk_count += 1;
 187
 188         blk_desc = mmc_get_blk_desc(mmc);
 189         if (!blk_desc) {
 190                 printf("Error - failed to obtain block descriptor\n");
 191                 return -ENODEV;
 192         }
 193         blk_written = blk_dwrite(blk_desc, start_lba, blk_count,
 194                                  (void *)get_load_addr());
 195 #else
 196         blk_count = image_size / mmc->block_dev.blksz;
 197         if (image_size % mmc->block_dev.blksz)
 198                 blk_count += 1;
 199
 200         blk_written = mmc->block_dev.block_write(mmc_dev_num,
 201                                                  start_lba, blk_count,
 202                                                  (void *)get_load_addr());
 203 #endif /* CONFIG_BLK */
 204         if (blk_written != blk_count) {
 205                 printf("Error - written %#lx blocks\n", blk_written);
 206                 return -ENOSPC;
 207         }
 208         printf("Done!\n");
 209
 210         return 0;
 211 }
 212
 213 static size_t mmc_read_file(const char *file_name)
 214 {
 215         loff_t          act_read = 0;
 216         int             rc;
 217         struct mmc      *mmc;
 218         const u8        mmc_dev_num = CONFIG_SYS_MMC_ENV_DEV;
 219
 220         mmc = find_mmc_device(mmc_dev_num);
 221         if (!mmc) {
 222                 printf("No SD/MMC/eMMC card found\n");
 223                 return 0;
 224         }
 225
 226         if (mmc_init(mmc)) {
 227                 printf("%s(%d) init failed\n", IS_SD(mmc) ? "SD" : "MMC",
 228                        mmc_dev_num);
 229                 return 0;
 230         }
 231
 232         /* Load from data partition (0) */
 233         if (fs_set_blk_dev("mmc", "0", FS_TYPE_ANY)) {
 234                 printf("Error: MMC 0 not found\n");
 235                 return 0;
 236         }
 237
 238         /* Perfrom file read */
 239         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 240         if (rc)
 241                 return 0;
 242
 243         return act_read;
 244 }
 245
 246 static int is_mmc_active(void)
 247 {
 248         return 1;
 249 }
 250 #else /* CONFIG_DM_MMC */
 251 static int mmc_burn_image(size_t image_size)
 252 {
 253         return -ENODEV;
 254 }
 255
 256 static size_t mmc_read_file(const char *file_name)
 257 {
 258         return 0;
 259 }
 260
 261 static int is_mmc_active(void)
 262 {
 263         return 0;
 264 }
 265 #endif /* CONFIG_DM_MMC */
 266
 267 /********************************************************************
 268  *     SPI services
 269  ********************************************************************/
 270 #ifdef CONFIG_SPI_FLASH
 271 static int spi_burn_image(size_t image_size)
 272 {
 273         int ret;
 274         struct spi_flash *flash;
 275         u32 erase_bytes;
 276
 277         /* Probe the SPI bus to get the flash device */
 278         flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
 279                                 CONFIG_ENV_SPI_CS,
 280                                 CONFIG_SF_DEFAULT_SPEED,
 281                                 CONFIG_SF_DEFAULT_MODE);
 282         if (!flash) {
 283                 printf("Failed to probe SPI Flash\n");
 284                 return -ENOMEDIUM;
 285         }
 286
 287         erase_bytes = image_size +
 288                 (flash->erase_size - image_size % flash->erase_size);
 289         printf("Erasing %d bytes (%d blocks) at offset 0 ...",
 290                erase_bytes, erase_bytes / flash->erase_size);
 291         ret = spi_flash_erase(flash, 0, erase_bytes);
 292         if (ret)
 293                 printf("Error!\n");
 294         else
 295                 printf("Done!\n");
 296
 297         printf("Writing %d bytes from 0x%lx to offset 0 ...",
 298                (int)image_size, get_load_addr());
 299         ret = spi_flash_write(flash, 0, image_size, (void *)get_load_addr());
 300         if (ret)
 301                 printf("Error!\n");
 302         else
 303                 printf("Done!\n");
 304
 305         return ret;
 306 }
 307
 308 static int is_spi_active(void)
 309 {
 310         return 1;
 311 }
 312
 313 #else /* CONFIG_SPI_FLASH */
 314 static int spi_burn_image(size_t image_size)
 315 {
 316         return -ENODEV;
 317 }
 318
 319 static int is_spi_active(void)
 320 {
 321         return 0;
 322 }
 323 #endif /* CONFIG_SPI_FLASH */
 324
 325 /********************************************************************
 326  *     NAND services
 327  ********************************************************************/
 328 #ifdef CONFIG_CMD_NAND
 329 static int nand_burn_image(size_t image_size)
 330 {
 331         int ret;
 332         uint32_t block_size;
 333         struct mtd_info *mtd;
 334
 335         mtd = get_nand_dev_by_index(nand_curr_device);
 336         if (!mtd) {
 337                 puts("\nno devices available\n");
 338                 return -ENOMEDIUM;
 339         }
 340         block_size = mtd->erasesize;
 341
 342         /* Align U-Boot size to currently used blocksize */
 343         image_size = ((image_size + (block_size - 1)) & (~(block_size - 1)));
 344
 345         /* Erase the U-Boot image space */
 346         printf("Erasing 0x%x - 0x%x:...", 0, (int)image_size);
 347         ret = nand_erase(mtd, 0, image_size);
 348         if (ret) {
 349                 printf("Error!\n");
 350                 goto error;
 351         }
 352         printf("Done!\n");
 353
 354         /* Write the image to flash */
 355         printf("Writing %d bytes from 0x%lx to offset 0 ... ",
 356                (int)image_size, get_load_addr());
 357         ret = nand_write(mtd, 0, &image_size, (void *)get_load_addr());
 358         if (ret)
 359                 printf("Error!\n");
 360         else
 361                 printf("Done!\n");
 362
 363 error:
 364         return ret;
 365 }
 366
 367 static int is_nand_active(void)
 368 {
 369         return 1;
 370 }
 371
 372 #else /* CONFIG_CMD_NAND */
 373 static int nand_burn_image(size_t image_size)
 374 {
 375         return -ENODEV;
 376 }
 377
 378 static int is_nand_active(void)
 379 {
 380         return 0;
 381 }
 382 #endif /* CONFIG_CMD_NAND */
 383
 384 /********************************************************************
 385  *     USB services
 386  ********************************************************************/
 387 #if defined(CONFIG_USB_STORAGE) && defined(CONFIG_BLK)
 388 static size_t usb_read_file(const char *file_name)
 389 {
 390         loff_t act_read = 0;
 391         struct udevice *dev;
 392         int rc;
 393
 394         usb_stop();
 395
 396         if (usb_init() < 0) {
 397                 printf("Error: usb_init failed\n");
 398                 return 0;
 399         }
 400
 401         /* Try to recognize storage devices immediately */
 402         blk_first_device(IF_TYPE_USB, &dev);
 403         if (!dev) {
 404                 printf("Error: USB storage device not found\n");
 405                 return 0;
 406         }
 407
 408         /* Always load from usb 0 */
 409         if (fs_set_blk_dev("usb", "0", FS_TYPE_ANY)) {
 410                 printf("Error: USB 0 not found\n");
 411                 return 0;
 412         }
 413
 414         /* Perfrom file read */
 415         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 416         if (rc)
 417                 return 0;
 418
 419         return act_read;
 420 }
 421
 422 static int is_usb_active(void)
 423 {
 424         return 1;
 425 }
 426
 427 #else /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 428 static size_t usb_read_file(const char *file_name)
 429 {
 430         return 0;
 431 }
 432
 433 static int is_usb_active(void)
 434 {
 435         return 0;
 436 }
 437 #endif /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 438
 439 /********************************************************************
 440  *     Network services
 441  ********************************************************************/
 442 #ifdef CONFIG_CMD_NET
 443 static size_t tftp_read_file(const char *file_name)
 444 {
 445         /*
 446          * update global variable image_load_addr before tftp file from network
 447          */
 448         image_load_addr = get_load_addr();
 449         return net_loop(TFTPGET);
 450 }
 451
 452 static int is_tftp_active(void)
 453 {
 454         return 1;
 455 }
 456
 457 #else
 458 static size_t tftp_read_file(const char *file_name)
 459 {
 460         return 0;
 461 }
 462
 463 static int is_tftp_active(void)
 464 {
 465         return 0;
 466 }
 467 #endif /* CONFIG_CMD_NET */
 468
 469 enum bubt_devices {
 470         BUBT_DEV_NET = 0,
 471         BUBT_DEV_USB,
 472         BUBT_DEV_MMC,
 473         BUBT_DEV_SPI,
 474         BUBT_DEV_NAND,
 475
 476         BUBT_MAX_DEV
 477 };
 478
 479 struct bubt_dev bubt_devs[BUBT_MAX_DEV] = {
 480         {"tftp", tftp_read_file, NULL, is_tftp_active},
 481         {"usb",  usb_read_file,  NULL, is_usb_active},
 482         {"mmc",  mmc_read_file,  mmc_burn_image, is_mmc_active},
 483         {"spi",  NULL, spi_burn_image,  is_spi_active},
 484         {"nand", NULL, nand_burn_image, is_nand_active},
 485 };
 486
 487 static int bubt_write_file(struct bubt_dev *dst, size_t image_size)
 488 {
 489         if (!dst->write) {
 490                 printf("Error: Write not supported on device %s\n", dst->name);
 491                 return -ENOTSUPP;
 492         }
 493
 494         return dst->write(image_size);
 495 }
 496
 497 #if defined(CONFIG_ARMADA_8K)
 498 u32 do_checksum32(u32 *start, int32_t len)
 499 {
 500         u32 sum = 0;
 501         u32 *startp = start;
 502
 503         do {
 504                 sum += *startp;
 505                 startp++;
 506                 len -= 4;
 507         } while (len > 0);
 508
 509         return sum;
 510 }
 511
 512 static int check_image_header(void)
 513 {
 514         struct mvebu_image_header *hdr =
 515                         (struct mvebu_image_header *)get_load_addr();
 516         u32 header_len = hdr->prolog_size;
 517         u32 checksum;
 518         u32 checksum_ref = hdr->prolog_checksum;
 519
 520         /*
 521          * For now compare checksum, and magic. Later we can
 522          * verify more stuff on the header like interface type, etc
 523          */
 524         if (hdr->magic != MAIN_HDR_MAGIC) {
 525                 printf("ERROR: Bad MAGIC 0x%08x != 0x%08x\n",
 526                        hdr->magic, MAIN_HDR_MAGIC);
 527                 return -ENOEXEC;
 528         }
 529
 530         /* The checksum value is discarded from checksum calculation */
 531         hdr->prolog_checksum = 0;
 532
 533         checksum = do_checksum32((u32 *)hdr, header_len);
 534         if (checksum != checksum_ref) {
 535                 printf("Error: Bad Image checksum. 0x%x != 0x%x\n",
 536                        checksum, checksum_ref);
 537                 return -ENOEXEC;
 538         }
 539
 540         /* Restore the checksum before writing */
 541         hdr->prolog_checksum = checksum_ref;
 542         printf("Image checksum...OK!\n");
 543
 544         return 0;
 545 }
 546 #elif defined(CONFIG_ARMADA_3700) /* Armada 3700 */
 547 static int check_image_header(void)
 548 {
 549         struct common_tim_data *hdr = (struct common_tim_data *)get_load_addr();
 550         int image_num;
 551         u8 hash_160_output[SHA1_SUM_LEN];
 552         u8 hash_256_output[SHA256_SUM_LEN];
 553         sha1_context hash1_text;
 554         sha256_context hash256_text;
 555         u8 *hash_output;
 556         u32 hash_algorithm_id;
 557         u32 image_size_to_hash;
 558         u32 flash_entry_addr;
 559         u32 *hash_value;
 560         u32 internal_hash[HASH_SUM_LEN];
 561         const u8 *buff;
 562         u32 num_of_image = hdr->num_images;
 563         u32 version = hdr->version;
 564         u32 trusted = hdr->trusted;
 565
 566         /* bubt checksum validation only supports nontrusted images */
 567         if (trusted == 1) {
 568                 printf("bypass image validation, ");
 569                 printf("only untrusted image is supported now\n");
 570                 return 0;
 571         }
 572         /* only supports image version 3.5 and 3.6 */
 573         if (version != IMAGE_VERSION_3_5_0 && version != IMAGE_VERSION_3_6_0) {
 574                 printf("Error: Unsupported Image version = 0x%08x\n", version);
 575                 return -ENOEXEC;
 576         }
 577         /* validate images hash value */
 578         for (image_num = 0; image_num < num_of_image; image_num++) {
 579                 struct mvebu_image_info *info =
 580                                 (struct mvebu_image_info *)(get_load_addr() +
 581                                 sizeof(struct common_tim_data) +
 582                                 image_num * sizeof(struct mvebu_image_info));
 583                 hash_algorithm_id = info->hash_algorithm_id;
 584                 image_size_to_hash = info->image_size_to_hash;
 585                 flash_entry_addr = info->flash_entry_addr;
 586                 hash_value = info->hash;
 587                 buff = (const u8 *)(get_load_addr() + flash_entry_addr);
 588
 589                 if (image_num == 0) {
 590                         /*
 591                          * The first image includes hash values in its content.
 592                          * For hash calculation, we need to save the original
 593                          * hash values to a local variable that will be
 594                          * copied back for comparsion and set all zeros to
 595                          * the orignal hash values for calculating new value.
 596                          * First image original format :
 597                          * x...x (datum1) x...x(orig. hash values) x...x(datum2)
 598                          * Replaced first image format :
 599                          * x...x (datum1) 0...0(hash values) x...x(datum2)
 600                          */
 601                         memcpy(internal_hash, hash_value,
 602                                sizeof(internal_hash));
 603                         memset(hash_value, 0, sizeof(internal_hash));
 604                 }
 605                 if (image_size_to_hash == 0) {
 606                         printf("Warning: Image_%d hash checksum is disabled, ",
 607                                image_num);
 608                         printf("skip the image validation.\n");
 609                         continue;
 610                 }
 611                 switch (hash_algorithm_id) {
 612                 case SHA1_SUM_LEN:
 613                         sha1_starts(&hash1_text);
 614                         sha1_update(&hash1_text, buff, image_size_to_hash);
 615                         sha1_finish(&hash1_text, hash_160_output);
 616                         hash_output = hash_160_output;
 617                         break;
 618                 case SHA256_SUM_LEN:
 619                         sha256_starts(&hash256_text);
 620                         sha256_update(&hash256_text, buff, image_size_to_hash);
 621                         sha256_finish(&hash256_text, hash_256_output);
 622                         hash_output = hash_256_output;
 623                         break;
 624                 default:
 625                         printf("Error: Unsupported hash_algorithm_id = %d\n",
 626                                hash_algorithm_id);
 627                         return -ENOEXEC;
 628                 }
 629                 if (image_num == 0)
 630                         memcpy(hash_value, internal_hash,
 631                                sizeof(internal_hash));
 632                 if (memcmp(hash_value, hash_output, hash_algorithm_id) != 0) {
 633                         printf("Error: Image_%d checksum is not correct\n",
 634                                image_num);
 635                         return -ENOEXEC;
 636                 }
 637         }
 638         printf("Image checksum...OK!\n");
 639
 640         return 0;
 641 }
 642 #elif defined(CONFIG_ARMADA_38X)
 643 static size_t a38x_header_size(const struct a38x_main_hdr_v1 *h)
 644 {
 645         if (h->version == 1)
 646                 return (h->headersz_msb << 16) | le16_to_cpu(h->headersz_lsb);
 647
 648         printf("Error: Invalid A38x image (header version 0x%x unknown)!\n",
 649                h->version);
 650         return 0;
 651 }
 652
 653 static uint8_t image_checksum8(const void *start, size_t len)
 654 {
 655         u8 csum = 0;
 656         const u8 *p = start;
 657
 658         while (len) {
 659                 csum += *p;
 660                 ++p;
 661                 --len;
 662         }
 663
 664         return csum;
 665 }
 666
 667 static int check_image_header(void)
 668 {
 669         u8 checksum;
 670         const struct a38x_main_hdr_v1 *hdr =
 671                 (struct a38x_main_hdr_v1 *)get_load_addr();
 672         const size_t image_size = a38x_header_size(hdr);
 673
 674         if (!image_size)
 675                 return -ENOEXEC;
 676
 677         checksum = image_checksum8(hdr, image_size);
 678         checksum -= hdr->checksum;
 679         if (checksum != hdr->checksum) {
 680                 printf("Error: Bad A38x image checksum. 0x%x != 0x%x\n",
 681                        checksum, hdr->checksum);
 682                 return -ENOEXEC;
 683         }
 684
 685         printf("Image checksum...OK!\n");
 686         return 0;
 687 }
 688 #else /* Not ARMADA? */
 689 static int check_image_header(void)
 690 {
 691         printf("bubt cmd does not support this SoC device or family!\n");
 692         return -ENOEXEC;
 693 }
 694 #endif
 695
 696 static int bubt_check_boot_mode(const struct bubt_dev *dst)
 697 {
 698         if (IS_ENABLED(CONFIG_ARMADA_38X)) {
 699                 int mode;
 700                 const struct a38x_main_hdr_v1 *hdr =
 701                         (struct a38x_main_hdr_v1 *)get_load_addr();
 702
 703                 for (mode = 0; mode < ARRAY_SIZE(a38x_boot_modes); mode++) {
 704                         if (strcmp(a38x_boot_modes[mode].name, dst->name) == 0)
 705                                 break;
 706                 }
 707
 708                 if (a38x_boot_modes[mode].id == hdr->blockid)
 709                         return 0;
 710
 711                 for (int i = 0; i < ARRAY_SIZE(a38x_boot_modes); i++) {
 712                         if (a38x_boot_modes[i].id == hdr->blockid) {
 713                                 printf("Error: A38x image meant to be booted from "
 714                                        "\"%s\", not \"%s\"!\n",
 715                                        a38x_boot_modes[i].name, dst->name);
 716                                 return -ENOEXEC;
 717                         }
 718                 }
 719
 720                 printf("Error: unknown boot device in A38x image header: "
 721                        "0x%x\n", hdr->blockid);
 722                 return -ENOEXEC;
 723         } else {
 724                 return 0;
 725         }
 726 }
 727
 728 static int bubt_verify(const struct bubt_dev *dst)
 729 {
 730         int err;
 731
 732         /* Check a correct image header exists */
 733         err = check_image_header();
 734         if (err) {
 735                 printf("Error: Image header verification failed\n");
 736                 return err;
 737         }
 738
 739         err = bubt_check_boot_mode(dst);
 740         if (err) {
 741                 printf("Error: Image boot mode verification failed\n");
 742                 return err;
 743         }
 744
 745         return 0;
 746 }
 747
 748 static int bubt_read_file(struct bubt_dev *src)
 749 {
 750         size_t image_size;
 751
 752         if (!src->read) {
 753                 printf("Error: Read not supported on device \"%s\"\n",
 754                        src->name);
 755                 return 0;
 756         }
 757
 758         image_size = src->read(net_boot_file_name);
 759         if (image_size <= 0) {
 760                 printf("Error: Failed to read file %s from %s\n",
 761                        net_boot_file_name, src->name);
 762                 return 0;
 763         }
 764
 765         return image_size;
 766 }
 767
 768 static int bubt_is_dev_active(struct bubt_dev *dev)
 769 {
 770         if (!dev->active) {
 771                 printf("Device \"%s\" not supported by U-Boot image\n",
 772                        dev->name);
 773                 return 0;
 774         }
 775
 776         if (!dev->active()) {
 777                 printf("Device \"%s\" is inactive\n", dev->name);
 778                 return 0;
 779         }
 780
 781         return 1;
 782 }
 783
 784 struct bubt_dev *find_bubt_dev(char *dev_name)
 785 {
 786         int dev;
 787
 788         for (dev = 0; dev < BUBT_MAX_DEV; dev++) {
 789                 if (strcmp(bubt_devs[dev].name, dev_name) == 0)
 790                         return &bubt_devs[dev];
 791         }
 792
 793         return 0;
 794 }
 795
 796 #define DEFAULT_BUBT_SRC "tftp"
 797
 798 #ifndef DEFAULT_BUBT_DST
 799 #ifdef CONFIG_MVEBU_SPI_BOOT
 800 #define DEFAULT_BUBT_DST "spi"
 801 #elif defined(CONFIG_MVEBU_NAND_BOOT)
 802 #define DEFAULT_BUBT_DST "nand"
 803 #elif defined(CONFIG_MVEBU_MMC_BOOT)
 804 #define DEFAULT_BUBT_DST "mmc"
 805 else
 806 #define DEFAULT_BUBT_DST "error"
 807 #endif
 808 #endif /* DEFAULT_BUBT_DST */
 809
 810 int do_bubt_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 811 {
 812         struct bubt_dev *src, *dst;
 813         size_t image_size;
 814         char src_dev_name[8];
 815         char dst_dev_name[8];
 816         char *name;
 817         int  err;
 818
 819         if (argc < 2)
 820                 copy_filename(net_boot_file_name,
 821                               CONFIG_MVEBU_UBOOT_DFLT_NAME,
 822                               sizeof(net_boot_file_name));
 823         else
 824                 copy_filename(net_boot_file_name, argv[1],
 825                               sizeof(net_boot_file_name));
 826
 827         if (argc >= 3) {
 828                 strncpy(dst_dev_name, argv[2], 8);
 829         } else {
 830                 name = DEFAULT_BUBT_DST;
 831                 strncpy(dst_dev_name, name, 8);
 832         }
 833
 834         if (argc >= 4)
 835                 strncpy(src_dev_name, argv[3], 8);
 836         else
 837                 strncpy(src_dev_name, DEFAULT_BUBT_SRC, 8);
 838
 839         /* Figure out the destination device */
 840         dst = find_bubt_dev(dst_dev_name);
 841         if (!dst) {
 842                 printf("Error: Unknown destination \"%s\"\n", dst_dev_name);
 843                 return -EINVAL;
 844         }
 845
 846         if (!bubt_is_dev_active(dst))
 847                 return -ENODEV;
 848
 849         /* Figure out the source device */
 850         src = find_bubt_dev(src_dev_name);
 851         if (!src) {
 852                 printf("Error: Unknown source \"%s\"\n", src_dev_name);
 853                 return 1;
 854         }
 855
 856         if (!bubt_is_dev_active(src))
 857                 return -ENODEV;
 858
 859         printf("Burning U-Boot image \"%s\" from \"%s\" to \"%s\"\n",
 860                net_boot_file_name, src->name, dst->name);
 861
 862         image_size = bubt_read_file(src);
 863         if (!image_size)
 864                 return -EIO;
 865
 866         err = bubt_verify(dst);
 867         if (err)
 868                 return err;
 869
 870         err = bubt_write_file(dst, image_size);
 871         if (err)
 872                 return err;
 873
 874         return 0;
 875 }
 876
 877 U_BOOT_CMD(
 878         bubt, 4, 0, do_bubt_cmd,
 879         "Burn a u-boot image to flash",
 880         "[file-name] [destination [source]]\n"
 881         "\t-file-name     The image file name to burn. Default = flash-image.bin\n"
 882         "\t-destination   Flash to burn to [spi, nand, mmc]. Default = active boot device\n"
 883         "\t-source        The source to load image from [tftp, usb, mmc]. Default = tftp\n"
 884         "Examples:\n"
 885         "\tbubt - Burn flash-image.bin from tftp to active boot device\n"
 886         "\tbubt flash-image-new.bin nand - Burn flash-image-new.bin from tftp to NAND flash\n"
 887         "\tbubt backup-flash-image.bin mmc usb - Burn backup-flash-image.bin from usb to MMC\n"
 888
 889 );