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 #ifdef CONFIG_SYS_MMC_ENV_PART
 180         if (mmc->part_num != CONFIG_SYS_MMC_ENV_PART) {
 181                 err = mmc_switch_part(mmc_dev_num, CONFIG_SYS_MMC_ENV_PART);
 182                 if (err) {
 183                         printf("MMC partition switch failed\n");
 184                         return err;
 185                 }
 186         }
 187 #endif
 188
 189         /* SD reserves LBA-0 for MBR and boots from LBA-1,
 190          * MMC/eMMC boots from LBA-0
 191          */
 192         start_lba = IS_SD(mmc) ? 1 : 0;
 193 #ifdef CONFIG_BLK
 194         blk_count = image_size / mmc->write_bl_len;
 195         if (image_size % mmc->write_bl_len)
 196                 blk_count += 1;
 197
 198         blk_desc = mmc_get_blk_desc(mmc);
 199         if (!blk_desc) {
 200                 printf("Error - failed to obtain block descriptor\n");
 201                 return -ENODEV;
 202         }
 203         blk_written = blk_dwrite(blk_desc, start_lba, blk_count,
 204                                  (void *)get_load_addr());
 205 #else
 206         blk_count = image_size / mmc->block_dev.blksz;
 207         if (image_size % mmc->block_dev.blksz)
 208                 blk_count += 1;
 209
 210         blk_written = mmc->block_dev.block_write(mmc_dev_num,
 211                                                  start_lba, blk_count,
 212                                                  (void *)get_load_addr());
 213 #endif /* CONFIG_BLK */
 214         if (blk_written != blk_count) {
 215                 printf("Error - written %#lx blocks\n", blk_written);
 216                 return -ENOSPC;
 217         }
 218         printf("Done!\n");
 219
 220 #ifdef CONFIG_SYS_MMC_ENV_PART
 221         if (mmc->part_num != CONFIG_SYS_MMC_ENV_PART)
 222                 mmc_switch_part(mmc_dev_num, mmc->part_num);
 223 #endif
 224
 225         return 0;
 226 }
 227
 228 static size_t mmc_read_file(const char *file_name)
 229 {
 230         loff_t          act_read = 0;
 231         int             rc;
 232         struct mmc      *mmc;
 233         const u8        mmc_dev_num = CONFIG_SYS_MMC_ENV_DEV;
 234
 235         mmc = find_mmc_device(mmc_dev_num);
 236         if (!mmc) {
 237                 printf("No SD/MMC/eMMC card found\n");
 238                 return 0;
 239         }
 240
 241         if (mmc_init(mmc)) {
 242                 printf("%s(%d) init failed\n", IS_SD(mmc) ? "SD" : "MMC",
 243                        mmc_dev_num);
 244                 return 0;
 245         }
 246
 247         /* Load from data partition (0) */
 248         if (fs_set_blk_dev("mmc", "0", FS_TYPE_ANY)) {
 249                 printf("Error: MMC 0 not found\n");
 250                 return 0;
 251         }
 252
 253         /* Perfrom file read */
 254         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 255         if (rc)
 256                 return 0;
 257
 258         return act_read;
 259 }
 260
 261 static int is_mmc_active(void)
 262 {
 263         return 1;
 264 }
 265 #else /* CONFIG_DM_MMC */
 266 static int mmc_burn_image(size_t image_size)
 267 {
 268         return -ENODEV;
 269 }
 270
 271 static size_t mmc_read_file(const char *file_name)
 272 {
 273         return 0;
 274 }
 275
 276 static int is_mmc_active(void)
 277 {
 278         return 0;
 279 }
 280 #endif /* CONFIG_DM_MMC */
 281
 282 /********************************************************************
 283  *     SPI services
 284  ********************************************************************/
 285 #ifdef CONFIG_SPI_FLASH
 286 static int spi_burn_image(size_t image_size)
 287 {
 288         int ret;
 289         struct spi_flash *flash;
 290         u32 erase_bytes;
 291
 292         /* Probe the SPI bus to get the flash device */
 293         flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
 294                                 CONFIG_ENV_SPI_CS,
 295                                 CONFIG_SF_DEFAULT_SPEED,
 296                                 CONFIG_SF_DEFAULT_MODE);
 297         if (!flash) {
 298                 printf("Failed to probe SPI Flash\n");
 299                 return -ENOMEDIUM;
 300         }
 301
 302         erase_bytes = image_size +
 303                 (flash->erase_size - image_size % flash->erase_size);
 304         printf("Erasing %d bytes (%d blocks) at offset 0 ...",
 305                erase_bytes, erase_bytes / flash->erase_size);
 306         ret = spi_flash_erase(flash, 0, erase_bytes);
 307         if (ret)
 308                 printf("Error!\n");
 309         else
 310                 printf("Done!\n");
 311
 312         printf("Writing %d bytes from 0x%lx to offset 0 ...",
 313                (int)image_size, get_load_addr());
 314         ret = spi_flash_write(flash, 0, image_size, (void *)get_load_addr());
 315         if (ret)
 316                 printf("Error!\n");
 317         else
 318                 printf("Done!\n");
 319
 320         return ret;
 321 }
 322
 323 static int is_spi_active(void)
 324 {
 325         return 1;
 326 }
 327
 328 #else /* CONFIG_SPI_FLASH */
 329 static int spi_burn_image(size_t image_size)
 330 {
 331         return -ENODEV;
 332 }
 333
 334 static int is_spi_active(void)
 335 {
 336         return 0;
 337 }
 338 #endif /* CONFIG_SPI_FLASH */
 339
 340 /********************************************************************
 341  *     NAND services
 342  ********************************************************************/
 343 #ifdef CONFIG_CMD_NAND
 344 static int nand_burn_image(size_t image_size)
 345 {
 346         int ret;
 347         uint32_t block_size;
 348         struct mtd_info *mtd;
 349
 350         mtd = get_nand_dev_by_index(nand_curr_device);
 351         if (!mtd) {
 352                 puts("\nno devices available\n");
 353                 return -ENOMEDIUM;
 354         }
 355         block_size = mtd->erasesize;
 356
 357         /* Align U-Boot size to currently used blocksize */
 358         image_size = ((image_size + (block_size - 1)) & (~(block_size - 1)));
 359
 360         /* Erase the U-Boot image space */
 361         printf("Erasing 0x%x - 0x%x:...", 0, (int)image_size);
 362         ret = nand_erase(mtd, 0, image_size);
 363         if (ret) {
 364                 printf("Error!\n");
 365                 goto error;
 366         }
 367         printf("Done!\n");
 368
 369         /* Write the image to flash */
 370         printf("Writing %d bytes from 0x%lx to offset 0 ... ",
 371                (int)image_size, get_load_addr());
 372         ret = nand_write(mtd, 0, &image_size, (void *)get_load_addr());
 373         if (ret)
 374                 printf("Error!\n");
 375         else
 376                 printf("Done!\n");
 377
 378 error:
 379         return ret;
 380 }
 381
 382 static int is_nand_active(void)
 383 {
 384         return 1;
 385 }
 386
 387 #else /* CONFIG_CMD_NAND */
 388 static int nand_burn_image(size_t image_size)
 389 {
 390         return -ENODEV;
 391 }
 392
 393 static int is_nand_active(void)
 394 {
 395         return 0;
 396 }
 397 #endif /* CONFIG_CMD_NAND */
 398
 399 /********************************************************************
 400  *     USB services
 401  ********************************************************************/
 402 #if defined(CONFIG_USB_STORAGE) && defined(CONFIG_BLK)
 403 static size_t usb_read_file(const char *file_name)
 404 {
 405         loff_t act_read = 0;
 406         struct udevice *dev;
 407         int rc;
 408
 409         usb_stop();
 410
 411         if (usb_init() < 0) {
 412                 printf("Error: usb_init failed\n");
 413                 return 0;
 414         }
 415
 416         /* Try to recognize storage devices immediately */
 417         blk_first_device(IF_TYPE_USB, &dev);
 418         if (!dev) {
 419                 printf("Error: USB storage device not found\n");
 420                 return 0;
 421         }
 422
 423         /* Always load from usb 0 */
 424         if (fs_set_blk_dev("usb", "0", FS_TYPE_ANY)) {
 425                 printf("Error: USB 0 not found\n");
 426                 return 0;
 427         }
 428
 429         /* Perfrom file read */
 430         rc = fs_read(file_name, get_load_addr(), 0, 0, &act_read);
 431         if (rc)
 432                 return 0;
 433
 434         return act_read;
 435 }
 436
 437 static int is_usb_active(void)
 438 {
 439         return 1;
 440 }
 441
 442 #else /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 443 static size_t usb_read_file(const char *file_name)
 444 {
 445         return 0;
 446 }
 447
 448 static int is_usb_active(void)
 449 {
 450         return 0;
 451 }
 452 #endif /* defined(CONFIG_USB_STORAGE) && defined (CONFIG_BLK) */
 453
 454 /********************************************************************
 455  *     Network services
 456  ********************************************************************/
 457 #ifdef CONFIG_CMD_NET
 458 static size_t tftp_read_file(const char *file_name)
 459 {
 460         /*
 461          * update global variable image_load_addr before tftp file from network
 462          */
 463         image_load_addr = get_load_addr();
 464         return net_loop(TFTPGET);
 465 }
 466
 467 static int is_tftp_active(void)
 468 {
 469         return 1;
 470 }
 471
 472 #else
 473 static size_t tftp_read_file(const char *file_name)
 474 {
 475         return 0;
 476 }
 477
 478 static int is_tftp_active(void)
 479 {
 480         return 0;
 481 }
 482 #endif /* CONFIG_CMD_NET */
 483
 484 enum bubt_devices {
 485         BUBT_DEV_NET = 0,
 486         BUBT_DEV_USB,
 487         BUBT_DEV_MMC,
 488         BUBT_DEV_SPI,
 489         BUBT_DEV_NAND,
 490
 491         BUBT_MAX_DEV
 492 };
 493
 494 struct bubt_dev bubt_devs[BUBT_MAX_DEV] = {
 495         {"tftp", tftp_read_file, NULL, is_tftp_active},
 496         {"usb",  usb_read_file,  NULL, is_usb_active},
 497         {"mmc",  mmc_read_file,  mmc_burn_image, is_mmc_active},
 498         {"spi",  NULL, spi_burn_image,  is_spi_active},
 499         {"nand", NULL, nand_burn_image, is_nand_active},
 500 };
 501
 502 static int bubt_write_file(struct bubt_dev *dst, size_t image_size)
 503 {
 504         if (!dst->write) {
 505                 printf("Error: Write not supported on device %s\n", dst->name);
 506                 return -ENOTSUPP;
 507         }
 508
 509         return dst->write(image_size);
 510 }
 511
 512 #if defined(CONFIG_ARMADA_8K)
 513 u32 do_checksum32(u32 *start, int32_t len)
 514 {
 515         u32 sum = 0;
 516         u32 *startp = start;
 517
 518         do {
 519                 sum += *startp;
 520                 startp++;
 521                 len -= 4;
 522         } while (len > 0);
 523
 524         return sum;
 525 }
 526
 527 static int check_image_header(void)
 528 {
 529         struct mvebu_image_header *hdr =
 530                         (struct mvebu_image_header *)get_load_addr();
 531         u32 header_len = hdr->prolog_size;
 532         u32 checksum;
 533         u32 checksum_ref = hdr->prolog_checksum;
 534
 535         /*
 536          * For now compare checksum, and magic. Later we can
 537          * verify more stuff on the header like interface type, etc
 538          */
 539         if (hdr->magic != MAIN_HDR_MAGIC) {
 540                 printf("ERROR: Bad MAGIC 0x%08x != 0x%08x\n",
 541                        hdr->magic, MAIN_HDR_MAGIC);
 542                 return -ENOEXEC;
 543         }
 544
 545         /* The checksum value is discarded from checksum calculation */
 546         hdr->prolog_checksum = 0;
 547
 548         checksum = do_checksum32((u32 *)hdr, header_len);
 549         if (checksum != checksum_ref) {
 550                 printf("Error: Bad Image checksum. 0x%x != 0x%x\n",
 551                        checksum, checksum_ref);
 552                 return -ENOEXEC;
 553         }
 554
 555         /* Restore the checksum before writing */
 556         hdr->prolog_checksum = checksum_ref;
 557         printf("Image checksum...OK!\n");
 558
 559         return 0;
 560 }
 561 #elif defined(CONFIG_ARMADA_3700) /* Armada 3700 */
 562 static int check_image_header(void)
 563 {
 564         struct common_tim_data *hdr = (struct common_tim_data *)get_load_addr();
 565         int image_num;
 566         u8 hash_160_output[SHA1_SUM_LEN];
 567         u8 hash_256_output[SHA256_SUM_LEN];
 568         sha1_context hash1_text;
 569         sha256_context hash256_text;
 570         u8 *hash_output;
 571         u32 hash_algorithm_id;
 572         u32 image_size_to_hash;
 573         u32 flash_entry_addr;
 574         u32 *hash_value;
 575         u32 internal_hash[HASH_SUM_LEN];
 576         const u8 *buff;
 577         u32 num_of_image = hdr->num_images;
 578         u32 version = hdr->version;
 579         u32 trusted = hdr->trusted;
 580
 581         /* bubt checksum validation only supports nontrusted images */
 582         if (trusted == 1) {
 583                 printf("bypass image validation, ");
 584                 printf("only untrusted image is supported now\n");
 585                 return 0;
 586         }
 587         /* only supports image version 3.5 and 3.6 */
 588         if (version != IMAGE_VERSION_3_5_0 && version != IMAGE_VERSION_3_6_0) {
 589                 printf("Error: Unsupported Image version = 0x%08x\n", version);
 590                 return -ENOEXEC;
 591         }
 592         /* validate images hash value */
 593         for (image_num = 0; image_num < num_of_image; image_num++) {
 594                 struct mvebu_image_info *info =
 595                                 (struct mvebu_image_info *)(get_load_addr() +
 596                                 sizeof(struct common_tim_data) +
 597                                 image_num * sizeof(struct mvebu_image_info));
 598                 hash_algorithm_id = info->hash_algorithm_id;
 599                 image_size_to_hash = info->image_size_to_hash;
 600                 flash_entry_addr = info->flash_entry_addr;
 601                 hash_value = info->hash;
 602                 buff = (const u8 *)(get_load_addr() + flash_entry_addr);
 603
 604                 if (image_num == 0) {
 605                         /*
 606                          * The first image includes hash values in its content.
 607                          * For hash calculation, we need to save the original
 608                          * hash values to a local variable that will be
 609                          * copied back for comparsion and set all zeros to
 610                          * the orignal hash values for calculating new value.
 611                          * First image original format :
 612                          * x...x (datum1) x...x(orig. hash values) x...x(datum2)
 613                          * Replaced first image format :
 614                          * x...x (datum1) 0...0(hash values) x...x(datum2)
 615                          */
 616                         memcpy(internal_hash, hash_value,
 617                                sizeof(internal_hash));
 618                         memset(hash_value, 0, sizeof(internal_hash));
 619                 }
 620                 if (image_size_to_hash == 0) {
 621                         printf("Warning: Image_%d hash checksum is disabled, ",
 622                                image_num);
 623                         printf("skip the image validation.\n");
 624                         continue;
 625                 }
 626                 switch (hash_algorithm_id) {
 627                 case SHA1_SUM_LEN:
 628                         sha1_starts(&hash1_text);
 629                         sha1_update(&hash1_text, buff, image_size_to_hash);
 630                         sha1_finish(&hash1_text, hash_160_output);
 631                         hash_output = hash_160_output;
 632                         break;
 633                 case SHA256_SUM_LEN:
 634                         sha256_starts(&hash256_text);
 635                         sha256_update(&hash256_text, buff, image_size_to_hash);
 636                         sha256_finish(&hash256_text, hash_256_output);
 637                         hash_output = hash_256_output;
 638                         break;
 639                 default:
 640                         printf("Error: Unsupported hash_algorithm_id = %d\n",
 641                                hash_algorithm_id);
 642                         return -ENOEXEC;
 643                 }
 644                 if (image_num == 0)
 645                         memcpy(hash_value, internal_hash,
 646                                sizeof(internal_hash));
 647                 if (memcmp(hash_value, hash_output, hash_algorithm_id) != 0) {
 648                         printf("Error: Image_%d checksum is not correct\n",
 649                                image_num);
 650                         return -ENOEXEC;
 651                 }
 652         }
 653         printf("Image checksum...OK!\n");
 654
 655         return 0;
 656 }
 657 #elif defined(CONFIG_ARMADA_38X)
 658 static size_t a38x_header_size(const struct a38x_main_hdr_v1 *h)
 659 {
 660         if (h->version == 1)
 661                 return (h->headersz_msb << 16) | le16_to_cpu(h->headersz_lsb);
 662
 663         printf("Error: Invalid A38x image (header version 0x%x unknown)!\n",
 664                h->version);
 665         return 0;
 666 }
 667
 668 static uint8_t image_checksum8(const void *start, size_t len)
 669 {
 670         u8 csum = 0;
 671         const u8 *p = start;
 672
 673         while (len) {
 674                 csum += *p;
 675                 ++p;
 676                 --len;
 677         }
 678
 679         return csum;
 680 }
 681
 682 static int check_image_header(void)
 683 {
 684         u8 checksum;
 685         const struct a38x_main_hdr_v1 *hdr =
 686                 (struct a38x_main_hdr_v1 *)get_load_addr();
 687         const size_t image_size = a38x_header_size(hdr);
 688
 689         if (!image_size)
 690                 return -ENOEXEC;
 691
 692         checksum = image_checksum8(hdr, image_size);
 693         checksum -= hdr->checksum;
 694         if (checksum != hdr->checksum) {
 695                 printf("Error: Bad A38x image checksum. 0x%x != 0x%x\n",
 696                        checksum, hdr->checksum);
 697                 return -ENOEXEC;
 698         }
 699
 700         printf("Image checksum...OK!\n");
 701         return 0;
 702 }
 703 #else /* Not ARMADA? */
 704 static int check_image_header(void)
 705 {
 706         printf("bubt cmd does not support this SoC device or family!\n");
 707         return -ENOEXEC;
 708 }
 709 #endif
 710
 711 static int bubt_check_boot_mode(const struct bubt_dev *dst)
 712 {
 713         if (IS_ENABLED(CONFIG_ARMADA_38X)) {
 714                 int mode;
 715                 const struct a38x_main_hdr_v1 *hdr =
 716                         (struct a38x_main_hdr_v1 *)get_load_addr();
 717
 718                 for (mode = 0; mode < ARRAY_SIZE(a38x_boot_modes); mode++) {
 719                         if (strcmp(a38x_boot_modes[mode].name, dst->name) == 0)
 720                                 break;
 721                 }
 722
 723                 if (a38x_boot_modes[mode].id == hdr->blockid)
 724                         return 0;
 725
 726                 for (int i = 0; i < ARRAY_SIZE(a38x_boot_modes); i++) {
 727                         if (a38x_boot_modes[i].id == hdr->blockid) {
 728                                 printf("Error: A38x image meant to be booted from "
 729                                        "\"%s\", not \"%s\"!\n",
 730                                        a38x_boot_modes[i].name, dst->name);
 731                                 return -ENOEXEC;
 732                         }
 733                 }
 734
 735                 printf("Error: unknown boot device in A38x image header: "
 736                        "0x%x\n", hdr->blockid);
 737                 return -ENOEXEC;
 738         } else {
 739                 return 0;
 740         }
 741 }
 742
 743 static int bubt_verify(const struct bubt_dev *dst)
 744 {
 745         int err;
 746
 747         /* Check a correct image header exists */
 748         err = check_image_header();
 749         if (err) {
 750                 printf("Error: Image header verification failed\n");
 751                 return err;
 752         }
 753
 754         err = bubt_check_boot_mode(dst);
 755         if (err) {
 756                 printf("Error: Image boot mode verification failed\n");
 757                 return err;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int bubt_read_file(struct bubt_dev *src)
 764 {
 765         size_t image_size;
 766
 767         if (!src->read) {
 768                 printf("Error: Read not supported on device \"%s\"\n",
 769                        src->name);
 770                 return 0;
 771         }
 772
 773         image_size = src->read(net_boot_file_name);
 774         if (image_size <= 0) {
 775                 printf("Error: Failed to read file %s from %s\n",
 776                        net_boot_file_name, src->name);
 777                 return 0;
 778         }
 779
 780         return image_size;
 781 }
 782
 783 static int bubt_is_dev_active(struct bubt_dev *dev)
 784 {
 785         if (!dev->active) {
 786                 printf("Device \"%s\" not supported by U-Boot image\n",
 787                        dev->name);
 788                 return 0;
 789         }
 790
 791         if (!dev->active()) {
 792                 printf("Device \"%s\" is inactive\n", dev->name);
 793                 return 0;
 794         }
 795
 796         return 1;
 797 }
 798
 799 struct bubt_dev *find_bubt_dev(char *dev_name)
 800 {
 801         int dev;
 802
 803         for (dev = 0; dev < BUBT_MAX_DEV; dev++) {
 804                 if (strcmp(bubt_devs[dev].name, dev_name) == 0)
 805                         return &bubt_devs[dev];
 806         }
 807
 808         return 0;
 809 }
 810
 811 #define DEFAULT_BUBT_SRC "tftp"
 812
 813 #ifndef DEFAULT_BUBT_DST
 814 #ifdef CONFIG_MVEBU_SPI_BOOT
 815 #define DEFAULT_BUBT_DST "spi"
 816 #elif defined(CONFIG_MVEBU_NAND_BOOT)
 817 #define DEFAULT_BUBT_DST "nand"
 818 #elif defined(CONFIG_MVEBU_MMC_BOOT)
 819 #define DEFAULT_BUBT_DST "mmc"
 820 else
 821 #define DEFAULT_BUBT_DST "error"
 822 #endif
 823 #endif /* DEFAULT_BUBT_DST */
 824
 825 int do_bubt_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 826 {
 827         struct bubt_dev *src, *dst;
 828         size_t image_size;
 829         char src_dev_name[8];
 830         char dst_dev_name[8];
 831         char *name;
 832         int  err;
 833
 834         if (argc < 2)
 835                 copy_filename(net_boot_file_name,
 836                               CONFIG_MVEBU_UBOOT_DFLT_NAME,
 837                               sizeof(net_boot_file_name));
 838         else
 839                 copy_filename(net_boot_file_name, argv[1],
 840                               sizeof(net_boot_file_name));
 841
 842         if (argc >= 3) {
 843                 strncpy(dst_dev_name, argv[2], 8);
 844         } else {
 845                 name = DEFAULT_BUBT_DST;
 846                 strncpy(dst_dev_name, name, 8);
 847         }
 848
 849         if (argc >= 4)
 850                 strncpy(src_dev_name, argv[3], 8);
 851         else
 852                 strncpy(src_dev_name, DEFAULT_BUBT_SRC, 8);
 853
 854         /* Figure out the destination device */
 855         dst = find_bubt_dev(dst_dev_name);
 856         if (!dst) {
 857                 printf("Error: Unknown destination \"%s\"\n", dst_dev_name);
 858                 return -EINVAL;
 859         }
 860
 861         if (!bubt_is_dev_active(dst))
 862                 return -ENODEV;
 863
 864         /* Figure out the source device */
 865         src = find_bubt_dev(src_dev_name);
 866         if (!src) {
 867                 printf("Error: Unknown source \"%s\"\n", src_dev_name);
 868                 return 1;
 869         }
 870
 871         if (!bubt_is_dev_active(src))
 872                 return -ENODEV;
 873
 874         printf("Burning U-Boot image \"%s\" from \"%s\" to \"%s\"\n",
 875                net_boot_file_name, src->name, dst->name);
 876
 877         image_size = bubt_read_file(src);
 878         if (!image_size)
 879                 return -EIO;
 880
 881         err = bubt_verify(dst);
 882         if (err)
 883                 return err;
 884
 885         err = bubt_write_file(dst, image_size);
 886         if (err)
 887                 return err;
 888
 889         return 0;
 890 }
 891
 892 U_BOOT_CMD(
 893         bubt, 4, 0, do_bubt_cmd,
 894         "Burn a u-boot image to flash",
 895         "[file-name] [destination [source]]\n"
 896         "\t-file-name     The image file name to burn. Default = flash-image.bin\n"
 897         "\t-destination   Flash to burn to [spi, nand, mmc]. Default = active boot device\n"
 898         "\t-source        The source to load image from [tftp, usb, mmc]. Default = tftp\n"
 899         "Examples:\n"
 900         "\tbubt - Burn flash-image.bin from tftp to active boot device\n"
 901         "\tbubt flash-image-new.bin nand - Burn flash-image-new.bin from tftp to NAND flash\n"
 902         "\tbubt backup-flash-image.bin mmc usb - Burn backup-flash-image.bin from usb to MMC\n"
 903
 904 );