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 <image.h>
  12 #include <vsprintf.h>
  13 #include <errno.h>
  14 #include <dm.h>
  15
  16 #include <spi_flash.h>
  17 #include <spi.h>
  18 #include <nand.h>
  19 #include <usb.h>
  20 #include <fs.h>
  21 #include <mmc.h>
  22 #ifdef CONFIG_BLK
  23 #include <blk.h>
  24 #endif
  25 #include <u-boot/sha1.h>
  26 #include <u-boot/sha256.h>
  27
  28 #ifndef CONFIG_SYS_MMC_ENV_DEV
  29 #define CONFIG_SYS_MMC_ENV_DEV  0
  30 #endif
  31
  32 #if defined(CONFIG_ARMADA_8K)
  33 #define MAIN_HDR_MAGIC          0xB105B002
  34
  35 struct mvebu_image_header {
  36         u32     magic;                  /*  0-3  */
  37         u32     prolog_size;            /*  4-7  */
  38         u32     prolog_checksum;        /*  8-11 */
  39         u32     boot_image_size;        /* 12-15 */
  40         u32     boot_image_checksum;    /* 16-19 */
  41         u32     rsrvd0;                 /* 20-23 */
  42         u32     load_addr;              /* 24-27 */
  43         u32     exec_addr;              /* 28-31 */
  44         u8      uart_cfg;               /*  32   */
  45         u8      baudrate;               /*  33   */
  46         u8      ext_count;              /*  34   */
  47         u8      aux_flags;              /*  35   */
  48         u32     io_arg_0;               /* 36-39 */
  49         u32     io_arg_1;               /* 40-43 */
  50         u32     io_arg_2;               /* 43-47 */
  51         u32     io_arg_3;               /* 48-51 */
  52         u32     rsrvd1;                 /* 52-55 */
  53         u32     rsrvd2;                 /* 56-59 */
  54         u32     rsrvd3;                 /* 60-63 */
  55 };
  56 #elif defined(CONFIG_ARMADA_3700)       /* A3700 */
  57 #define HASH_SUM_LEN            16
  58 #define IMAGE_VERSION_3_6_0     0x030600
  59 #define IMAGE_VERSION_3_5_0     0x030500
  60
  61 struct common_tim_data {
  62         u32     version;
  63         u32     identifier;
  64         u32     trusted;
  65         u32     issue_date;
  66         u32     oem_unique_id;
  67         u32     reserved[5];            /* Reserve 20 bytes */
  68         u32     boot_flash_sign;
  69         u32     num_images;
  70         u32     num_keys;
  71         u32     size_of_reserved;
  72 };
  73
  74 struct mvebu_image_info {
  75         u32     image_id;
  76         u32     next_image_id;
  77         u32     flash_entry_addr;
  78         u32     load_addr;
  79         u32     image_size;
  80         u32     image_size_to_hash;
  81         u32     hash_algorithm_id;
  82         u32     hash[HASH_SUM_LEN];     /* Reserve 512 bits for the hash */
  83         u32     partition_number;
  84         u32     enc_algorithm_id;
  85         u32     encrypt_start_offset;
  86         u32     encrypt_size;
  87 };
  88 #elif defined(CONFIG_ARMADA_38X)        /* A38X */
  89
  90 /* Structure of the main header, version 1 (Armada 370/38x/XP) */
  91 struct a38x_main_hdr_v1 {
  92         u8  blockid;               /* 0x0       */
  93         u8  flags;                 /* 0x1       */
  94         u16 reserved2;             /* 0x2-0x3   */
  95         u32 blocksize;             /* 0x4-0x7   */
  96         u8  version;               /* 0x8       */
  97         u8  headersz_msb;          /* 0x9       */
  98         u16 headersz_lsb;          /* 0xA-0xB   */
  99         u32 srcaddr;               /* 0xC-0xF   */
 100         u32 destaddr;              /* 0x10-0x13 */
 101         u32 execaddr;              /* 0x14-0x17 */
 102         u8  options;               /* 0x18      */
 103         u8  nandblocksize;         /* 0x19      */
 104         u8  nandbadblklocation;    /* 0x1A      */
 105         u8  reserved4;             /* 0x1B      */
 106         u16 reserved5;             /* 0x1C-0x1D */
 107         u8  ext;                   /* 0x1E      */
 108         u8  checksum;              /* 0x1F      */
 109 };
 110 #endif
 111
 112 struct bubt_dev {
 113         char name[8];
 114         size_t (*read)(const char *file_name);
 115         int (*write)(size_t image_size);
 116         int (*active)(void);
 117 };
 118
 119 static ulong get_load_addr(void)
 120 {
 121         const char *addr_str;
 122         unsigned long addr;
 123
 124         addr_str = env_get("loadaddr");
 125         if (addr_str)
 126                 addr = simple_strtoul(addr_str, NULL, 16);
 127         else
 128                 addr = CONFIG_SYS_LOAD_ADDR;
 129
 130         return addr;
 131 }
 132
 133 /********************************************************************
 134  *     eMMC services
 135  ********************************************************************/
 136 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(MMC_WRITE)
 137 static int mmc_burn_image(size_t image_size)
 138 {
 139         struct mmc      *mmc;
 140         lbaint_t        start_lba;
 141         lbaint_t        blk_count;
 142         ulong           blk_written;
 143         int             err;
 144         const u8        mmc_dev_num = CONFIG_SYS_MMC_ENV_DEV;
 145 #ifdef CONFIG_BLK
 146         struct blk_desc *blk_desc;
 147 #endif
 148         mmc = find_mmc_device(mmc_dev_num);
 149         if (!mmc) {
 150                 printf("No SD/MMC/eMMC card found\n");
 151                 return -ENOMEDIUM;
 152         }
 153
 154         err = mmc_init(mmc);
 155         if (err) {
 156                 printf("%s(%d) init failed\n", IS_SD(mmc) ? "SD" : "MMC",
 157                        mmc_dev_num);
 158                 return err;
 159         }
 160
 161 #ifdef CONFIG_SYS_MMC_ENV_PART
 162         if (mmc->part_num != CONFIG_SYS_MMC_ENV_PART) {
 163                 err = mmc_switch_part(mmc_dev_num, CONFIG_SYS_MMC_ENV_PART);
 164                 if (err) {
 165                         printf("MMC partition switch failed\n");
 166                         return err;
 167                 }
 168         }
 169 #endif
 170
 171         /* SD reserves LBA-0 for MBR and boots from LBA-1,
 172          * MMC/eMMC boots from LBA-0
 173          */
 174         start_lba = IS_SD(mmc) ? 1 : 0;
 175 #ifdef CONFIG_BLK
 176         blk_count = image_size / mmc->write_bl_len;
 177         if (image_size % mmc->write_bl_len)
 178                 blk_count += 1;
 179
 180         blk_desc = mmc_get_blk_desc(mmc);
 181         if (!blk_desc) {
 182                 printf("Error - failed to obtain block descriptor\n");
 183                 return -ENODEV;
 184         }
 185         blk_written = blk_dwrite(blk_desc, start_lba, blk_count,
 186                                  (void *)get_load_addr());
 187 #else
 188         blk_count = image_size / mmc->block_dev.blksz;
 189         if (image_size % mmc->block_dev.blksz)
 190                 blk_count += 1;
 191
 192         blk_written = mmc->block_dev.block_write(mmc_dev_num,
 193                                                  start_lba, blk_count,
 194                                                  (void *)get_load_addr());
 195 #endif /* CONFIG_BLK */
 196         if (blk_written != blk_count) {
 197                 printf("Error - written %#lx blocks\n", blk_written);
 198                 return -ENOSPC;
 199         }
 200         printf("Done!\n");
 201
 202 #ifdef CONFIG_SYS_MMC_ENV_PART
 203         if (mmc->part_num != CONFIG_SYS_MMC_ENV_PART)
 204                 mmc_switch_part(mmc_dev_num, mmc->part_num);
 205 #endif
 206
 207         return 0;
 208 }
 209
 210 static size_t mmc_read_file(const char *file_name)
 211 {
 212         loff_t          act_read = 0;
 213         int             rc;
 214         struct mmc      *mmc;
 215         const u8        mmc_dev_num = CONFIG_SYS_MMC_ENV_DEV;
 216
 217         mmc = find_mmc_device(mmc_dev_num);
 218         if (!mmc) {
 219                 printf("No SD/MMC/eMMC card found\n");
 220                 return 0;
 221         }
 222
 223         if (mmc_init(mmc)) {
 224                 printf("%s(%d) init failed\n", IS_SD(mmc) ? "SD" : "MMC",
 225                        mmc_dev_num);
 226                 return 0;
 227         }
 228
 229         /* Load from data partition (0) */
 230         if (fs_set_blk_dev("mmc", "0", FS_TYPE_ANY)) {
 231                 printf("Error: MMC 0 not found\n");
 232                 return 0;
 233         }
 234
 235         /* Perfrom file read */
 236         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 237         if (rc)
 238                 return 0;
 239
 240         return act_read;
 241 }
 242
 243 static int is_mmc_active(void)
 244 {
 245         return 1;
 246 }
 247 #else /* CONFIG_DM_MMC */
 248 static int mmc_burn_image(size_t image_size)
 249 {
 250         return -ENODEV;
 251 }
 252
 253 static size_t mmc_read_file(const char *file_name)
 254 {
 255         return 0;
 256 }
 257
 258 static int is_mmc_active(void)
 259 {
 260         return 0;
 261 }
 262 #endif /* CONFIG_DM_MMC */
 263
 264 /********************************************************************
 265  *     SPI services
 266  ********************************************************************/
 267 #ifdef CONFIG_SPI_FLASH
 268 static int spi_burn_image(size_t image_size)
 269 {
 270         int ret;
 271         struct spi_flash *flash;
 272         u32 erase_bytes;
 273
 274         /* Probe the SPI bus to get the flash device */
 275         flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
 276                                 CONFIG_ENV_SPI_CS,
 277                                 CONFIG_SF_DEFAULT_SPEED,
 278                                 CONFIG_SF_DEFAULT_MODE);
 279         if (!flash) {
 280                 printf("Failed to probe SPI Flash\n");
 281                 return -ENOMEDIUM;
 282         }
 283
 284 #ifdef CONFIG_SPI_FLASH_PROTECTION
 285         spi_flash_protect(flash, 0);
 286 #endif
 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 #ifdef CONFIG_SPI_FLASH_PROTECTION
 306         spi_flash_protect(flash, 1);
 307 #endif
 308
 309         return ret;
 310 }
 311
 312 static int is_spi_active(void)
 313 {
 314         return 1;
 315 }
 316
 317 #else /* CONFIG_SPI_FLASH */
 318 static int spi_burn_image(size_t image_size)
 319 {
 320         return -ENODEV;
 321 }
 322
 323 static int is_spi_active(void)
 324 {
 325         return 0;
 326 }
 327 #endif /* CONFIG_SPI_FLASH */
 328
 329 /********************************************************************
 330  *     NAND services
 331  ********************************************************************/
 332 #ifdef CONFIG_CMD_NAND
 333 static int nand_burn_image(size_t image_size)
 334 {
 335         int ret;
 336         uint32_t block_size;
 337         struct mtd_info *mtd;
 338
 339         mtd = get_nand_dev_by_index(nand_curr_device);
 340         if (!mtd) {
 341                 puts("\nno devices available\n");
 342                 return -ENOMEDIUM;
 343         }
 344         block_size = mtd->erasesize;
 345
 346         /* Align U-Boot size to currently used blocksize */
 347         image_size = ((image_size + (block_size - 1)) & (~(block_size - 1)));
 348
 349         /* Erase the U-Boot image space */
 350         printf("Erasing 0x%x - 0x%x:...", 0, (int)image_size);
 351         ret = nand_erase(mtd, 0, image_size);
 352         if (ret) {
 353                 printf("Error!\n");
 354                 goto error;
 355         }
 356         printf("Done!\n");
 357
 358         /* Write the image to flash */
 359         printf("Writing %d bytes from 0x%lx to offset 0 ... ",
 360                (int)image_size, get_load_addr());
 361         ret = nand_write(mtd, 0, &image_size, (void *)get_load_addr());
 362         if (ret)
 363                 printf("Error!\n");
 364         else
 365                 printf("Done!\n");
 366
 367 error:
 368         return ret;
 369 }
 370
 371 static int is_nand_active(void)
 372 {
 373         return 1;
 374 }
 375
 376 #else /* CONFIG_CMD_NAND */
 377 static int nand_burn_image(size_t image_size)
 378 {
 379         return -ENODEV;
 380 }
 381
 382 static int is_nand_active(void)
 383 {
 384         return 0;
 385 }
 386 #endif /* CONFIG_CMD_NAND */
 387
 388 /********************************************************************
 389  *     USB services
 390  ********************************************************************/
 391 #if defined(CONFIG_USB_STORAGE) && defined(CONFIG_BLK)
 392 static size_t usb_read_file(const char *file_name)
 393 {
 394         loff_t act_read = 0;
 395         struct udevice *dev;
 396         int rc;
 397
 398         usb_stop();
 399
 400         if (usb_init() < 0) {
 401                 printf("Error: usb_init failed\n");
 402                 return 0;
 403         }
 404
 405         /* Try to recognize storage devices immediately */
 406         blk_first_device(IF_TYPE_USB, &dev);
 407         if (!dev) {
 408                 printf("Error: USB storage device not found\n");
 409                 return 0;
 410         }
 411
 412         /* Always load from usb 0 */
 413         if (fs_set_blk_dev("usb", "0", FS_TYPE_ANY)) {
 414                 printf("Error: USB 0 not found\n");
 415                 return 0;
 416         }
 417
 418         /* Perfrom file read */
 419         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 420         if (rc)
 421                 return 0;
 422
 423         return act_read;
 424 }
 425
 426 static int is_usb_active(void)
 427 {
 428         return 1;
 429 }
 430
 431 #else /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 432 static size_t usb_read_file(const char *file_name)
 433 {
 434         return 0;
 435 }
 436
 437 static int is_usb_active(void)
 438 {
 439         return 0;
 440 }
 441 #endif /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 442
 443 /********************************************************************
 444  *     Network services
 445  ********************************************************************/
 446 #ifdef CONFIG_CMD_NET
 447 static size_t tftp_read_file(const char *file_name)
 448 {
 449         /*
 450          * update global variable image_load_addr before tftp file from network
 451          */
 452         image_load_addr = get_load_addr();
 453         return net_loop(TFTPGET);
 454 }
 455
 456 static int is_tftp_active(void)
 457 {
 458         return 1;
 459 }
 460
 461 #else
 462 static size_t tftp_read_file(const char *file_name)
 463 {
 464         return 0;
 465 }
 466
 467 static int is_tftp_active(void)
 468 {
 469         return 0;
 470 }
 471 #endif /* CONFIG_CMD_NET */
 472
 473 enum bubt_devices {
 474         BUBT_DEV_NET = 0,
 475         BUBT_DEV_USB,
 476         BUBT_DEV_MMC,
 477         BUBT_DEV_SPI,
 478         BUBT_DEV_NAND,
 479
 480         BUBT_MAX_DEV
 481 };
 482
 483 struct bubt_dev bubt_devs[BUBT_MAX_DEV] = {
 484         {"tftp", tftp_read_file, NULL, is_tftp_active},
 485         {"usb",  usb_read_file,  NULL, is_usb_active},
 486         {"mmc",  mmc_read_file,  mmc_burn_image, is_mmc_active},
 487         {"spi",  NULL, spi_burn_image,  is_spi_active},
 488         {"nand", NULL, nand_burn_image, is_nand_active},
 489 };
 490
 491 static int bubt_write_file(struct bubt_dev *dst, size_t image_size)
 492 {
 493         if (!dst->write) {
 494                 printf("Error: Write not supported on device %s\n", dst->name);
 495                 return -ENOTSUPP;
 496         }
 497
 498         return dst->write(image_size);
 499 }
 500
 501 #if defined(CONFIG_ARMADA_8K)
 502 u32 do_checksum32(u32 *start, int32_t len)
 503 {
 504         u32 sum = 0;
 505         u32 *startp = start;
 506
 507         do {
 508                 sum += *startp;
 509                 startp++;
 510                 len -= 4;
 511         } while (len > 0);
 512
 513         return sum;
 514 }
 515
 516 static int check_image_header(void)
 517 {
 518         struct mvebu_image_header *hdr =
 519                         (struct mvebu_image_header *)get_load_addr();
 520         u32 header_len = hdr->prolog_size;
 521         u32 checksum;
 522         u32 checksum_ref = hdr->prolog_checksum;
 523
 524         /*
 525          * For now compare checksum, and magic. Later we can
 526          * verify more stuff on the header like interface type, etc
 527          */
 528         if (hdr->magic != MAIN_HDR_MAGIC) {
 529                 printf("ERROR: Bad MAGIC 0x%08x != 0x%08x\n",
 530                        hdr->magic, MAIN_HDR_MAGIC);
 531                 return -ENOEXEC;
 532         }
 533
 534         /* The checksum value is discarded from checksum calculation */
 535         hdr->prolog_checksum = 0;
 536
 537         checksum = do_checksum32((u32 *)hdr, header_len);
 538         if (checksum != checksum_ref) {
 539                 printf("Error: Bad Image checksum. 0x%x != 0x%x\n",
 540                        checksum, checksum_ref);
 541                 return -ENOEXEC;
 542         }
 543
 544         /* Restore the checksum before writing */
 545         hdr->prolog_checksum = checksum_ref;
 546         printf("Image checksum...OK!\n");
 547
 548         return 0;
 549 }
 550 #elif defined(CONFIG_ARMADA_3700) /* Armada 3700 */
 551 static int check_image_header(void)
 552 {
 553         struct common_tim_data *hdr = (struct common_tim_data *)get_load_addr();
 554         int image_num;
 555         u8 hash_160_output[SHA1_SUM_LEN];
 556         u8 hash_256_output[SHA256_SUM_LEN];
 557         sha1_context hash1_text;
 558         sha256_context hash256_text;
 559         u8 *hash_output;
 560         u32 hash_algorithm_id;
 561         u32 image_size_to_hash;
 562         u32 flash_entry_addr;
 563         u32 *hash_value;
 564         u32 internal_hash[HASH_SUM_LEN];
 565         const u8 *buff;
 566         u32 num_of_image = hdr->num_images;
 567         u32 version = hdr->version;
 568         u32 trusted = hdr->trusted;
 569
 570         /* bubt checksum validation only supports nontrusted images */
 571         if (trusted == 1) {
 572                 printf("bypass image validation, ");
 573                 printf("only untrusted image is supported now\n");
 574                 return 0;
 575         }
 576         /* only supports image version 3.5 and 3.6 */
 577         if (version != IMAGE_VERSION_3_5_0 && version != IMAGE_VERSION_3_6_0) {
 578                 printf("Error: Unsupported Image version = 0x%08x\n", version);
 579                 return -ENOEXEC;
 580         }
 581         /* validate images hash value */
 582         for (image_num = 0; image_num < num_of_image; image_num++) {
 583                 struct mvebu_image_info *info =
 584                                 (struct mvebu_image_info *)(get_load_addr() +
 585                                 sizeof(struct common_tim_data) +
 586                                 image_num * sizeof(struct mvebu_image_info));
 587                 hash_algorithm_id = info->hash_algorithm_id;
 588                 image_size_to_hash = info->image_size_to_hash;
 589                 flash_entry_addr = info->flash_entry_addr;
 590                 hash_value = info->hash;
 591                 buff = (const u8 *)(get_load_addr() + flash_entry_addr);
 592
 593                 if (image_num == 0) {
 594                         /*
 595                          * The first image includes hash values in its content.
 596                          * For hash calculation, we need to save the original
 597                          * hash values to a local variable that will be
 598                          * copied back for comparsion and set all zeros to
 599                          * the orignal hash values for calculating new value.
 600                          * First image original format :
 601                          * x...x (datum1) x...x(orig. hash values) x...x(datum2)
 602                          * Replaced first image format :
 603                          * x...x (datum1) 0...0(hash values) x...x(datum2)
 604                          */
 605                         memcpy(internal_hash, hash_value,
 606                                sizeof(internal_hash));
 607                         memset(hash_value, 0, sizeof(internal_hash));
 608                 }
 609                 if (image_size_to_hash == 0) {
 610                         printf("Warning: Image_%d hash checksum is disabled, ",
 611                                image_num);
 612                         printf("skip the image validation.\n");
 613                         continue;
 614                 }
 615                 switch (hash_algorithm_id) {
 616                 case SHA1_SUM_LEN:
 617                         sha1_starts(&hash1_text);
 618                         sha1_update(&hash1_text, buff, image_size_to_hash);
 619                         sha1_finish(&hash1_text, hash_160_output);
 620                         hash_output = hash_160_output;
 621                         break;
 622                 case SHA256_SUM_LEN:
 623                         sha256_starts(&hash256_text);
 624                         sha256_update(&hash256_text, buff, image_size_to_hash);
 625                         sha256_finish(&hash256_text, hash_256_output);
 626                         hash_output = hash_256_output;
 627                         break;
 628                 default:
 629                         printf("Error: Unsupported hash_algorithm_id = %d\n",
 630                                hash_algorithm_id);
 631                         return -ENOEXEC;
 632                 }
 633                 if (image_num == 0)
 634                         memcpy(hash_value, internal_hash,
 635                                sizeof(internal_hash));
 636                 if (memcmp(hash_value, hash_output, hash_algorithm_id) != 0) {
 637                         printf("Error: Image_%d checksum is not correct\n",
 638                                image_num);
 639                         return -ENOEXEC;
 640                 }
 641         }
 642         printf("Image checksum...OK!\n");
 643
 644         return 0;
 645 }
 646 #elif defined(CONFIG_ARMADA_38X)
 647 static size_t a38x_header_size(const struct a38x_main_hdr_v1 *h)
 648 {
 649         if (h->version == 1)
 650                 return (h->headersz_msb << 16) | le16_to_cpu(h->headersz_lsb);
 651
 652         printf("Error: Invalid A38x image (header version 0x%x unknown)!\n",
 653                h->version);
 654         return 0;
 655 }
 656
 657 static uint8_t image_checksum8(const void *start, size_t len)
 658 {
 659         u8 csum = 0;
 660         const u8 *p = start;
 661
 662         while (len) {
 663                 csum += *p;
 664                 ++p;
 665                 --len;
 666         }
 667
 668         return csum;
 669 }
 670
 671 static int check_image_header(void)
 672 {
 673         u8 checksum;
 674         const struct a38x_main_hdr_v1 *hdr =
 675                 (struct a38x_main_hdr_v1 *)get_load_addr();
 676         const size_t image_size = a38x_header_size(hdr);
 677
 678         if (!image_size)
 679                 return -ENOEXEC;
 680
 681         checksum = image_checksum8(hdr, image_size);
 682         checksum -= hdr->checksum;
 683         if (checksum != hdr->checksum) {
 684                 printf("Error: Bad A38x image checksum. 0x%x != 0x%x\n",
 685                        checksum, hdr->checksum);
 686                 return -ENOEXEC;
 687         }
 688
 689         printf("Image checksum...OK!\n");
 690         return 0;
 691 }
 692 #else /* Not ARMADA? */
 693 static int check_image_header(void)
 694 {
 695         printf("bubt cmd does not support this SoC device or family!\n");
 696         return -ENOEXEC;
 697 }
 698 #endif
 699
 700 static int bubt_verify(size_t image_size)
 701 {
 702         int err;
 703
 704         /* Check a correct image header exists */
 705         err = check_image_header();
 706         if (err) {
 707                 printf("Error: Image header verification failed\n");
 708                 return err;
 709         }
 710
 711         return 0;
 712 }
 713
 714 static int bubt_read_file(struct bubt_dev *src)
 715 {
 716         size_t image_size;
 717
 718         if (!src->read) {
 719                 printf("Error: Read not supported on device \"%s\"\n",
 720                        src->name);
 721                 return 0;
 722         }
 723
 724         image_size = src->read(net_boot_file_name);
 725         if (image_size <= 0) {
 726                 printf("Error: Failed to read file %s from %s\n",
 727                        net_boot_file_name, src->name);
 728                 return 0;
 729         }
 730
 731         return image_size;
 732 }
 733
 734 static int bubt_is_dev_active(struct bubt_dev *dev)
 735 {
 736         if (!dev->active) {
 737                 printf("Device \"%s\" not supported by U-Boot image\n",
 738                        dev->name);
 739                 return 0;
 740         }
 741
 742         if (!dev->active()) {
 743                 printf("Device \"%s\" is inactive\n", dev->name);
 744                 return 0;
 745         }
 746
 747         return 1;
 748 }
 749
 750 struct bubt_dev *find_bubt_dev(char *dev_name)
 751 {
 752         int dev;
 753
 754         for (dev = 0; dev < BUBT_MAX_DEV; dev++) {
 755                 if (strcmp(bubt_devs[dev].name, dev_name) == 0)
 756                         return &bubt_devs[dev];
 757         }
 758
 759         return 0;
 760 }
 761
 762 #define DEFAULT_BUBT_SRC "tftp"
 763
 764 #ifndef DEFAULT_BUBT_DST
 765 #ifdef CONFIG_MVEBU_SPI_BOOT
 766 #define DEFAULT_BUBT_DST "spi"
 767 #elif defined(CONFIG_MVEBU_NAND_BOOT)
 768 #define DEFAULT_BUBT_DST "nand"
 769 #elif defined(CONFIG_MVEBU_MMC_BOOT)
 770 #define DEFAULT_BUBT_DST "mmc"
 771 else
 772 #define DEFAULT_BUBT_DST "error"
 773 #endif
 774 #endif /* DEFAULT_BUBT_DST */
 775
 776 int do_bubt_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 777 {
 778         struct bubt_dev *src, *dst;
 779         size_t image_size;
 780         char src_dev_name[8];
 781         char dst_dev_name[8];
 782         char *name;
 783         int  err;
 784
 785         if (argc < 2)
 786                 copy_filename(net_boot_file_name,
 787                               CONFIG_MVEBU_UBOOT_DFLT_NAME,
 788                               sizeof(net_boot_file_name));
 789         else
 790                 copy_filename(net_boot_file_name, argv[1],
 791                               sizeof(net_boot_file_name));
 792
 793         if (argc >= 3) {
 794                 strncpy(dst_dev_name, argv[2], 8);
 795         } else {
 796                 name = DEFAULT_BUBT_DST;
 797                 strncpy(dst_dev_name, name, 8);
 798         }
 799
 800         if (argc >= 4)
 801                 strncpy(src_dev_name, argv[3], 8);
 802         else
 803                 strncpy(src_dev_name, DEFAULT_BUBT_SRC, 8);
 804
 805         /* Figure out the destination device */
 806         dst = find_bubt_dev(dst_dev_name);
 807         if (!dst) {
 808                 printf("Error: Unknown destination \"%s\"\n", dst_dev_name);
 809                 return -EINVAL;
 810         }
 811
 812         if (!bubt_is_dev_active(dst))
 813                 return -ENODEV;
 814
 815         /* Figure out the source device */
 816         src = find_bubt_dev(src_dev_name);
 817         if (!src) {
 818                 printf("Error: Unknown source \"%s\"\n", src_dev_name);
 819                 return 1;
 820         }
 821
 822         if (!bubt_is_dev_active(src))
 823                 return -ENODEV;
 824
 825         printf("Burning U-Boot image \"%s\" from \"%s\" to \"%s\"\n",
 826                net_boot_file_name, src->name, dst->name);
 827
 828         image_size = bubt_read_file(src);
 829         if (!image_size)
 830                 return -EIO;
 831
 832         err = bubt_verify(image_size);
 833         if (err)
 834                 return err;
 835
 836         err = bubt_write_file(dst, image_size);
 837         if (err)
 838                 return err;
 839
 840         return 0;
 841 }
 842
 843 U_BOOT_CMD(
 844         bubt, 4, 0, do_bubt_cmd,
 845         "Burn a u-boot image to flash",
 846         "[file-name] [destination [source]]\n"
 847         "\t-file-name     The image file name to burn. Default = flash-image.bin\n"
 848         "\t-destination   Flash to burn to [spi, nand, mmc]. Default = active boot device\n"
 849         "\t-source        The source to load image from [tftp, usb, mmc]. Default = tftp\n"
 850         "Examples:\n"
 851         "\tbubt - Burn flash-image.bin from tftp to active boot device\n"
 852         "\tbubt flash-image-new.bin nand - Burn flash-image-new.bin from tftp to NAND flash\n"
 853         "\tbubt backup-flash-image.bin mmc usb - Burn backup-flash-image.bin from usb to MMC\n"
 854
 855 );