1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright 2014 Broadcom Corporation. 4 */ 5 6#include <config.h> 7#include <common.h> 8#include <blk.h> 9#include <env.h> 10#include <fastboot.h> 11#include <fastboot-internal.h> 12#include <fb_mmc.h> 13#include <image-sparse.h> 14#include <image.h> 15#include <log.h> 16#include <part.h> 17#include <mmc.h> 18#include <div64.h> 19#include <linux/compat.h> 20#include <android_image.h> 21 22#define BOOT_PARTITION_NAME "boot" 23 24struct fb_mmc_sparse { 25 struct blk_desc *dev_desc; 26}; 27 28static int raw_part_get_info_by_name(struct blk_desc *dev_desc, 29 const char *name, 30 struct disk_partition *info) 31{ 32 /* strlen("fastboot_raw_partition_") + PART_NAME_LEN + 1 */ 33 char env_desc_name[23 + PART_NAME_LEN + 1]; 34 char *raw_part_desc; 35 const char *argv[2]; 36 const char **parg = argv; 37 38 /* check for raw partition descriptor */ 39 strcpy(env_desc_name, "fastboot_raw_partition_"); 40 strlcat(env_desc_name, name, sizeof(env_desc_name)); 41 raw_part_desc = strdup(env_get(env_desc_name)); 42 if (raw_part_desc == NULL) 43 return -ENODEV; 44 45 /* 46 * parse partition descriptor 47 * 48 * <lba_start> <lba_size> [mmcpart <num>] 49 */ 50 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) { 51 *parg = strsep(&raw_part_desc, " "); 52 if (*parg == NULL) { 53 pr_err("Invalid number of arguments.\n"); 54 return -ENODEV; 55 } 56 } 57 58 info->start = simple_strtoul(argv[0], NULL, 0); 59 info->size = simple_strtoul(argv[1], NULL, 0); 60 info->blksz = dev_desc->blksz; 61 strlcpy((char *)info->name, name, PART_NAME_LEN); 62 63 if (raw_part_desc) { 64 if (strcmp(strsep(&raw_part_desc, " "), "mmcpart") == 0) { 65 ulong mmcpart = simple_strtoul(raw_part_desc, NULL, 0); 66 int ret = blk_dselect_hwpart(dev_desc, mmcpart); 67 68 if (ret) 69 return ret; 70 } 71 } 72 73 return 0; 74} 75 76static int do_get_part_info(struct blk_desc **dev_desc, const char *name, 77 struct disk_partition *info) 78{ 79 int ret; 80 81 /* First try partition names on the default device */ 82 *dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 83 if (*dev_desc) { 84 ret = part_get_info_by_name(*dev_desc, name, info); 85 if (ret >= 0) 86 return ret; 87 88 /* Then try raw partitions */ 89 ret = raw_part_get_info_by_name(*dev_desc, name, info); 90 if (ret >= 0) 91 return ret; 92 } 93 94 /* Then try dev.hwpart:part */ 95 ret = part_get_info_by_dev_and_name_or_num("mmc", name, dev_desc, 96 info, true); 97 return ret; 98} 99 100static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc, 101 const char *name, 102 struct disk_partition *info) 103{ 104 /* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */ 105 char env_alias_name[25 + PART_NAME_LEN + 1]; 106 char *aliased_part_name; 107 108 /* check for alias */ 109 strlcpy(env_alias_name, "fastboot_partition_alias_", sizeof(env_alias_name)); 110 strlcat(env_alias_name, name, sizeof(env_alias_name)); 111 aliased_part_name = env_get(env_alias_name); 112 if (aliased_part_name) 113 name = aliased_part_name; 114 115 return do_get_part_info(dev_desc, name, info); 116} 117 118/** 119 * fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE 120 * 121 * @block_dev: Pointer to block device 122 * @start: First block to write/erase 123 * @blkcnt: Count of blocks 124 * @buffer: Pointer to data buffer for write or NULL for erase 125 */ 126static lbaint_t fb_mmc_blk_write(struct blk_desc *block_dev, lbaint_t start, 127 lbaint_t blkcnt, const void *buffer) 128{ 129 lbaint_t blk = start; 130 lbaint_t blks_written; 131 lbaint_t cur_blkcnt; 132 lbaint_t blks = 0; 133 int i; 134 135 for (i = 0; i < blkcnt; i += FASTBOOT_MAX_BLK_WRITE) { 136 cur_blkcnt = min((int)blkcnt - i, FASTBOOT_MAX_BLK_WRITE); 137 if (buffer) { 138 if (fastboot_progress_callback) 139 fastboot_progress_callback("writing"); 140 blks_written = blk_dwrite(block_dev, blk, cur_blkcnt, 141 buffer + (i * block_dev->blksz)); 142 } else { 143 if (fastboot_progress_callback) 144 fastboot_progress_callback("erasing"); 145 blks_written = blk_derase(block_dev, blk, cur_blkcnt); 146 } 147 blk += blks_written; 148 blks += blks_written; 149 } 150 return blks; 151} 152 153static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info, 154 lbaint_t blk, lbaint_t blkcnt, const void *buffer) 155{ 156 struct fb_mmc_sparse *sparse = info->priv; 157 struct blk_desc *dev_desc = sparse->dev_desc; 158 159 return fb_mmc_blk_write(dev_desc, blk, blkcnt, buffer); 160} 161 162static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info, 163 lbaint_t blk, lbaint_t blkcnt) 164{ 165 return blkcnt; 166} 167 168static void write_raw_image(struct blk_desc *dev_desc, 169 struct disk_partition *info, const char *part_name, 170 void *buffer, u32 download_bytes, char *response) 171{ 172 lbaint_t blkcnt; 173 lbaint_t blks; 174 175 /* determine number of blocks to write */ 176 blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1)); 177 blkcnt = lldiv(blkcnt, info->blksz); 178 179 if (blkcnt > info->size) { 180 pr_err("too large for partition: '%s'\n", part_name); 181 fastboot_fail("too large for partition", response); 182 return; 183 } 184 185 puts("Flashing Raw Image\n"); 186 187 blks = fb_mmc_blk_write(dev_desc, info->start, blkcnt, buffer); 188 189 if (blks != blkcnt) { 190 pr_err("failed writing to device %d\n", dev_desc->devnum); 191 fastboot_fail("failed writing to device", response); 192 return; 193 } 194 195 printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz, 196 part_name); 197 fastboot_okay(NULL, response); 198} 199 200#if defined(CONFIG_FASTBOOT_MMC_BOOT_SUPPORT) || \ 201 defined(CONFIG_FASTBOOT_MMC_USER_SUPPORT) 202static int fb_mmc_erase_mmc_hwpart(struct blk_desc *dev_desc) 203{ 204 lbaint_t blks; 205 206 debug("Start Erasing mmc hwpart[%u]...\n", dev_desc->hwpart); 207 208 blks = fb_mmc_blk_write(dev_desc, 0, dev_desc->lba, NULL); 209 210 if (blks != dev_desc->lba) { 211 pr_err("Failed to erase mmc hwpart[%u]\n", dev_desc->hwpart); 212 return 1; 213 } 214 215 printf("........ erased %lu bytes from mmc hwpart[%u]\n", 216 dev_desc->lba * dev_desc->blksz, dev_desc->hwpart); 217 218 return 0; 219} 220#endif 221 222#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT 223static void fb_mmc_boot_ops(struct blk_desc *dev_desc, void *buffer, 224 int hwpart, u32 buff_sz, char *response) 225{ 226 lbaint_t blkcnt; 227 lbaint_t blks; 228 unsigned long blksz; 229 230 // To operate on EMMC_BOOT1/2 (mmc0boot0/1) we first change the hwpart 231 if (blk_dselect_hwpart(dev_desc, hwpart)) { 232 pr_err("Failed to select hwpart\n"); 233 fastboot_fail("Failed to select hwpart", response); 234 return; 235 } 236 237 if (buffer) { /* flash */ 238 239 /* determine number of blocks to write */ 240 blksz = dev_desc->blksz; 241 blkcnt = ((buff_sz + (blksz - 1)) & ~(blksz - 1)); 242 blkcnt = lldiv(blkcnt, blksz); 243 244 if (blkcnt > dev_desc->lba) { 245 pr_err("Image size too large\n"); 246 fastboot_fail("Image size too large", response); 247 return; 248 } 249 250 debug("Start Flashing Image to EMMC_BOOT%d...\n", hwpart); 251 252 blks = fb_mmc_blk_write(dev_desc, 0, blkcnt, buffer); 253 254 if (blks != blkcnt) { 255 pr_err("Failed to write EMMC_BOOT%d\n", hwpart); 256 fastboot_fail("Failed to write EMMC_BOOT part", 257 response); 258 return; 259 } 260 261 printf("........ wrote %lu bytes to EMMC_BOOT%d\n", 262 blkcnt * blksz, hwpart); 263 } else { /* erase */ 264 if (fb_mmc_erase_mmc_hwpart(dev_desc)) { 265 pr_err("Failed to erase EMMC_BOOT%d\n", hwpart); 266 fastboot_fail("Failed to erase EMMC_BOOT part", 267 response); 268 return; 269 } 270 } 271 272 fastboot_okay(NULL, response); 273} 274#endif 275 276#ifdef CONFIG_ANDROID_BOOT_IMAGE 277/** 278 * Read Android boot image header from boot partition. 279 * 280 * @param[in] dev_desc MMC device descriptor 281 * @param[in] info Boot partition info 282 * @param[out] hdr Where to store read boot image header 283 * 284 * Return: Boot image header sectors count or 0 on error 285 */ 286static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc, 287 struct disk_partition *info, 288 struct andr_boot_img_hdr_v0 *hdr, 289 char *response) 290{ 291 ulong sector_size; /* boot partition sector size */ 292 lbaint_t hdr_sectors; /* boot image header sectors count */ 293 int res; 294 295 /* Calculate boot image sectors count */ 296 sector_size = info->blksz; 297 hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_boot_img_hdr_v0), sector_size); 298 if (hdr_sectors == 0) { 299 pr_err("invalid number of boot sectors: 0\n"); 300 fastboot_fail("invalid number of boot sectors: 0", response); 301 return 0; 302 } 303 304 /* Read the boot image header */ 305 res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr); 306 if (res != hdr_sectors) { 307 pr_err("cannot read header from boot partition\n"); 308 fastboot_fail("cannot read header from boot partition", 309 response); 310 return 0; 311 } 312 313 /* Check boot header magic string */ 314 if (!is_android_boot_image_header(hdr)) { 315 pr_err("bad boot image magic\n"); 316 fastboot_fail("boot partition not initialized", response); 317 return 0; 318 } 319 320 return hdr_sectors; 321} 322 323/** 324 * Write downloaded zImage to boot partition and repack it properly. 325 * 326 * @param dev_desc MMC device descriptor 327 * @param download_buffer Address to fastboot buffer with zImage in it 328 * @param download_bytes Size of fastboot buffer, in bytes 329 * 330 * Return: 0 on success or -1 on error 331 */ 332static int fb_mmc_update_zimage(struct blk_desc *dev_desc, 333 void *download_buffer, 334 u32 download_bytes, 335 char *response) 336{ 337 uintptr_t hdr_addr; /* boot image header address */ 338 struct andr_boot_img_hdr_v0 *hdr; /* boot image header */ 339 lbaint_t hdr_sectors; /* boot image header sectors */ 340 u8 *ramdisk_buffer; 341 u32 ramdisk_sector_start; 342 u32 ramdisk_sectors; 343 u32 kernel_sector_start; 344 u32 kernel_sectors; 345 u32 sectors_per_page; 346 struct disk_partition info; 347 int res; 348 349 puts("Flashing zImage\n"); 350 351 /* Get boot partition info */ 352 res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info); 353 if (res < 0) { 354 pr_err("cannot find boot partition\n"); 355 fastboot_fail("cannot find boot partition", response); 356 return -1; 357 } 358 359 /* Put boot image header in fastboot buffer after downloaded zImage */ 360 hdr_addr = (uintptr_t)download_buffer + ALIGN(download_bytes, PAGE_SIZE); 361 hdr = (struct andr_boot_img_hdr_v0 *)hdr_addr; 362 363 /* Read boot image header */ 364 hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response); 365 if (hdr_sectors == 0) { 366 pr_err("unable to read boot image header\n"); 367 fastboot_fail("unable to read boot image header", response); 368 return -1; 369 } 370 371 /* Check if boot image header version is 2 or less */ 372 if (hdr->header_version > 2) { 373 pr_err("zImage flashing supported only for boot images v2 and less\n"); 374 fastboot_fail("zImage flashing supported only for boot images v2 and less", 375 response); 376 return -EOPNOTSUPP; 377 } 378 379 /* Check if boot image has second stage in it (we don't support it) */ 380 if (hdr->second_size > 0) { 381 pr_err("moving second stage is not supported yet\n"); 382 fastboot_fail("moving second stage is not supported yet", 383 response); 384 return -1; 385 } 386 387 /* Extract ramdisk location */ 388 sectors_per_page = hdr->page_size / info.blksz; 389 ramdisk_sector_start = info.start + sectors_per_page; 390 ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) * 391 sectors_per_page; 392 ramdisk_sectors = DIV_ROUND_UP(hdr->ramdisk_size, hdr->page_size) * 393 sectors_per_page; 394 395 /* Read ramdisk and put it in fastboot buffer after boot image header */ 396 ramdisk_buffer = (u8 *)hdr + (hdr_sectors * info.blksz); 397 res = blk_dread(dev_desc, ramdisk_sector_start, ramdisk_sectors, 398 ramdisk_buffer); 399 if (res != ramdisk_sectors) { 400 pr_err("cannot read ramdisk from boot partition\n"); 401 fastboot_fail("cannot read ramdisk from boot partition", 402 response); 403 return -1; 404 } 405 406 /* Write new kernel size to boot image header */ 407 hdr->kernel_size = download_bytes; 408 res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr); 409 if (res == 0) { 410 pr_err("cannot writeback boot image header\n"); 411 fastboot_fail("cannot write back boot image header", response); 412 return -1; 413 } 414 415 /* Write the new downloaded kernel */ 416 kernel_sector_start = info.start + sectors_per_page; 417 kernel_sectors = DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) * 418 sectors_per_page; 419 res = blk_dwrite(dev_desc, kernel_sector_start, kernel_sectors, 420 download_buffer); 421 if (res == 0) { 422 pr_err("cannot write new kernel\n"); 423 fastboot_fail("cannot write new kernel", response); 424 return -1; 425 } 426 427 /* Write the saved ramdisk back */ 428 ramdisk_sector_start = info.start + sectors_per_page; 429 ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) * 430 sectors_per_page; 431 res = blk_dwrite(dev_desc, ramdisk_sector_start, ramdisk_sectors, 432 ramdisk_buffer); 433 if (res == 0) { 434 pr_err("cannot write back original ramdisk\n"); 435 fastboot_fail("cannot write back original ramdisk", response); 436 return -1; 437 } 438 439 puts("........ zImage was updated in boot partition\n"); 440 fastboot_okay(NULL, response); 441 return 0; 442} 443#endif 444 445/** 446 * fastboot_mmc_get_part_info() - Lookup eMMC partion by name 447 * 448 * @part_name: Named partition to lookup 449 * @dev_desc: Pointer to returned blk_desc pointer 450 * @part_info: Pointer to returned struct disk_partition 451 * @response: Pointer to fastboot response buffer 452 */ 453int fastboot_mmc_get_part_info(const char *part_name, 454 struct blk_desc **dev_desc, 455 struct disk_partition *part_info, char *response) 456{ 457 int ret; 458 459 if (!part_name || !strcmp(part_name, "")) { 460 fastboot_fail("partition not given", response); 461 return -ENOENT; 462 } 463 464 ret = part_get_info_by_name_or_alias(dev_desc, part_name, part_info); 465 if (ret < 0) { 466 switch (ret) { 467 case -ENOSYS: 468 case -EINVAL: 469 fastboot_fail("invalid partition or device", response); 470 break; 471 case -ENODEV: 472 fastboot_fail("no such device", response); 473 break; 474 case -ENOENT: 475 fastboot_fail("no such partition", response); 476 break; 477 case -EPROTONOSUPPORT: 478 fastboot_fail("unknown partition table type", response); 479 break; 480 default: 481 fastboot_fail("unanticipated error", response); 482 break; 483 } 484 } 485 486 return ret; 487} 488 489static struct blk_desc *fastboot_mmc_get_dev(char *response) 490{ 491 struct blk_desc *ret = blk_get_dev("mmc", 492 CONFIG_FASTBOOT_FLASH_MMC_DEV); 493 494 if (!ret || ret->type == DEV_TYPE_UNKNOWN) { 495 pr_err("invalid mmc device\n"); 496 fastboot_fail("invalid mmc device", response); 497 return NULL; 498 } 499 return ret; 500} 501 502/** 503 * fastboot_mmc_flash_write() - Write image to eMMC for fastboot 504 * 505 * @cmd: Named partition to write image to 506 * @download_buffer: Pointer to image data 507 * @download_bytes: Size of image data 508 * @response: Pointer to fastboot response buffer 509 */ 510void fastboot_mmc_flash_write(const char *cmd, void *download_buffer, 511 u32 download_bytes, char *response) 512{ 513 struct blk_desc *dev_desc; 514 struct disk_partition info = {0}; 515 516#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT 517 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) { 518 dev_desc = fastboot_mmc_get_dev(response); 519 if (dev_desc) 520 fb_mmc_boot_ops(dev_desc, download_buffer, 1, 521 download_bytes, response); 522 return; 523 } 524 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) { 525 dev_desc = fastboot_mmc_get_dev(response); 526 if (dev_desc) 527 fb_mmc_boot_ops(dev_desc, download_buffer, 2, 528 download_bytes, response); 529 return; 530 } 531#endif 532 533#if CONFIG_IS_ENABLED(EFI_PARTITION) 534 if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) { 535 dev_desc = fastboot_mmc_get_dev(response); 536 if (!dev_desc) 537 return; 538 539 printf("%s: updating MBR, Primary and Backup GPT(s)\n", 540 __func__); 541 if (is_valid_gpt_buf(dev_desc, download_buffer)) { 542 printf("%s: invalid GPT - refusing to write to flash\n", 543 __func__); 544 fastboot_fail("invalid GPT partition", response); 545 return; 546 } 547 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) { 548 printf("%s: writing GPT partitions failed\n", __func__); 549 fastboot_fail("writing GPT partitions failed", 550 response); 551 return; 552 } 553 part_init(dev_desc); 554 printf("........ success\n"); 555 fastboot_okay(NULL, response); 556 return; 557 } 558#endif 559 560#if CONFIG_IS_ENABLED(DOS_PARTITION) 561 if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) { 562 dev_desc = fastboot_mmc_get_dev(response); 563 if (!dev_desc) 564 return; 565 566 printf("%s: updating MBR\n", __func__); 567 if (is_valid_dos_buf(download_buffer)) { 568 printf("%s: invalid MBR - refusing to write to flash\n", 569 __func__); 570 fastboot_fail("invalid MBR partition", response); 571 return; 572 } 573 if (write_mbr_sector(dev_desc, download_buffer)) { 574 printf("%s: writing MBR partition failed\n", __func__); 575 fastboot_fail("writing MBR partition failed", 576 response); 577 return; 578 } 579 part_init(dev_desc); 580 printf("........ success\n"); 581 fastboot_okay(NULL, response); 582 return; 583 } 584#endif 585 586#ifdef CONFIG_ANDROID_BOOT_IMAGE 587 if (strncasecmp(cmd, "zimage", 6) == 0) { 588 dev_desc = fastboot_mmc_get_dev(response); 589 if (dev_desc) 590 fb_mmc_update_zimage(dev_desc, download_buffer, 591 download_bytes, response); 592 return; 593 } 594#endif 595 596#if IS_ENABLED(CONFIG_FASTBOOT_MMC_USER_SUPPORT) 597 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) { 598 dev_desc = fastboot_mmc_get_dev(response); 599 if (!dev_desc) 600 return; 601 602 strlcpy((char *)&info.name, cmd, sizeof(info.name)); 603 info.size = dev_desc->lba; 604 info.blksz = dev_desc->blksz; 605 } 606#endif 607 608 if (!info.name[0] && 609 fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0) 610 return; 611 612 if (is_sparse_image(download_buffer)) { 613 struct fb_mmc_sparse sparse_priv; 614 struct sparse_storage sparse; 615 int err; 616 617 sparse_priv.dev_desc = dev_desc; 618 619 sparse.blksz = info.blksz; 620 sparse.start = info.start; 621 sparse.size = info.size; 622 sparse.write = fb_mmc_sparse_write; 623 sparse.reserve = fb_mmc_sparse_reserve; 624 sparse.mssg = fastboot_fail; 625 626 printf("Flashing sparse image at offset " LBAFU "\n", 627 sparse.start); 628 629 sparse.priv = &sparse_priv; 630 err = write_sparse_image(&sparse, cmd, download_buffer, 631 response); 632 if (!err) 633 fastboot_okay(NULL, response); 634 } else { 635 write_raw_image(dev_desc, &info, cmd, download_buffer, 636 download_bytes, response); 637 } 638} 639 640/** 641 * fastboot_mmc_flash_erase() - Erase eMMC for fastboot 642 * 643 * @cmd: Named partition to erase 644 * @response: Pointer to fastboot response buffer 645 */ 646void fastboot_mmc_erase(const char *cmd, char *response) 647{ 648 struct blk_desc *dev_desc; 649 struct disk_partition info; 650 lbaint_t blks, blks_start, blks_size, grp_size; 651 struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV); 652 653#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT 654 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) { 655 /* erase EMMC boot1 */ 656 dev_desc = fastboot_mmc_get_dev(response); 657 if (dev_desc) 658 fb_mmc_boot_ops(dev_desc, NULL, 1, 0, response); 659 return; 660 } 661 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) { 662 /* erase EMMC boot2 */ 663 dev_desc = fastboot_mmc_get_dev(response); 664 if (dev_desc) 665 fb_mmc_boot_ops(dev_desc, NULL, 2, 0, response); 666 return; 667 } 668#endif 669 670#ifdef CONFIG_FASTBOOT_MMC_USER_SUPPORT 671 if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) { 672 /* erase EMMC userdata */ 673 dev_desc = fastboot_mmc_get_dev(response); 674 if (!dev_desc) 675 return; 676 677 if (fb_mmc_erase_mmc_hwpart(dev_desc)) 678 fastboot_fail("Failed to erase EMMC_USER", response); 679 else 680 fastboot_okay(NULL, response); 681 return; 682 } 683#endif 684 685 if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0) 686 return; 687 688 /* Align blocks to erase group size to avoid erasing other partitions */ 689 grp_size = mmc->erase_grp_size; 690 blks_start = (info.start + grp_size - 1) & ~(grp_size - 1); 691 if (info.size >= grp_size) 692 blks_size = (info.size - (blks_start - info.start)) & 693 (~(grp_size - 1)); 694 else 695 blks_size = 0; 696 697 printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n", 698 blks_start, blks_start + blks_size); 699 700 blks = fb_mmc_blk_write(dev_desc, blks_start, blks_size, NULL); 701 702 if (blks != blks_size) { 703 pr_err("failed erasing from device %d\n", dev_desc->devnum); 704 fastboot_fail("failed erasing from device", response); 705 return; 706 } 707 708 printf("........ erased " LBAFU " bytes from '%s'\n", 709 blks_size * info.blksz, cmd); 710 fastboot_okay(NULL, response); 711} 712