1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2014 Broadcom Corporation.
11 #include <fastboot-internal.h>
14 #include <image-sparse.h>
18 #include <linux/compat.h>
19 #include <android_image.h>
21 #define FASTBOOT_MAX_BLK_WRITE 16384
23 #define BOOT_PARTITION_NAME "boot"
25 struct fb_mmc_sparse
{
26 struct blk_desc
*dev_desc
;
29 static int part_get_info_by_name_or_alias(struct blk_desc
*dev_desc
,
30 const char *name
, disk_partition_t
*info
)
34 ret
= part_get_info_by_name(dev_desc
, name
, info
);
36 /* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
37 char env_alias_name
[25 + PART_NAME_LEN
+ 1];
38 char *aliased_part_name
;
41 strcpy(env_alias_name
, "fastboot_partition_alias_");
42 strncat(env_alias_name
, name
, PART_NAME_LEN
);
43 aliased_part_name
= env_get(env_alias_name
);
44 if (aliased_part_name
!= NULL
)
45 ret
= part_get_info_by_name(dev_desc
,
46 aliased_part_name
, info
);
52 * fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE
54 * @block_dev: Pointer to block device
55 * @start: First block to write/erase
56 * @blkcnt: Count of blocks
57 * @buffer: Pointer to data buffer for write or NULL for erase
59 static lbaint_t
fb_mmc_blk_write(struct blk_desc
*block_dev
, lbaint_t start
,
60 lbaint_t blkcnt
, const void *buffer
)
63 lbaint_t blks_written
;
68 for (i
= 0; i
< blkcnt
; i
+= FASTBOOT_MAX_BLK_WRITE
) {
69 cur_blkcnt
= min((int)blkcnt
- i
, FASTBOOT_MAX_BLK_WRITE
);
71 if (fastboot_progress_callback
)
72 fastboot_progress_callback("writing");
73 blks_written
= blk_dwrite(block_dev
, blk
, cur_blkcnt
,
74 buffer
+ (i
* block_dev
->blksz
));
76 if (fastboot_progress_callback
)
77 fastboot_progress_callback("erasing");
78 blks_written
= blk_derase(block_dev
, blk
, cur_blkcnt
);
86 static lbaint_t
fb_mmc_sparse_write(struct sparse_storage
*info
,
87 lbaint_t blk
, lbaint_t blkcnt
, const void *buffer
)
89 struct fb_mmc_sparse
*sparse
= info
->priv
;
90 struct blk_desc
*dev_desc
= sparse
->dev_desc
;
92 return fb_mmc_blk_write(dev_desc
, blk
, blkcnt
, buffer
);
95 static lbaint_t
fb_mmc_sparse_reserve(struct sparse_storage
*info
,
96 lbaint_t blk
, lbaint_t blkcnt
)
101 static void write_raw_image(struct blk_desc
*dev_desc
, disk_partition_t
*info
,
102 const char *part_name
, void *buffer
,
103 u32 download_bytes
, char *response
)
108 /* determine number of blocks to write */
109 blkcnt
= ((download_bytes
+ (info
->blksz
- 1)) & ~(info
->blksz
- 1));
110 blkcnt
= lldiv(blkcnt
, info
->blksz
);
112 if (blkcnt
> info
->size
) {
113 pr_err("too large for partition: '%s'\n", part_name
);
114 fastboot_fail("too large for partition", response
);
118 puts("Flashing Raw Image\n");
120 blks
= fb_mmc_blk_write(dev_desc
, info
->start
, blkcnt
, buffer
);
122 if (blks
!= blkcnt
) {
123 pr_err("failed writing to device %d\n", dev_desc
->devnum
);
124 fastboot_fail("failed writing to device", response
);
128 printf("........ wrote " LBAFU
" bytes to '%s'\n", blkcnt
* info
->blksz
,
130 fastboot_okay(NULL
, response
);
133 #ifdef CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT
134 static int fb_mmc_erase_mmc_hwpart(struct blk_desc
*dev_desc
)
138 debug("Start Erasing mmc hwpart[%u]...\n", dev_desc
->hwpart
);
140 blks
= fb_mmc_blk_write(dev_desc
, 0, dev_desc
->lba
, NULL
);
142 if (blks
!= dev_desc
->lba
) {
143 pr_err("Failed to erase mmc hwpart[%u]\n", dev_desc
->hwpart
);
147 printf("........ erased %lu bytes from mmc hwpart[%u]\n",
148 dev_desc
->lba
* dev_desc
->blksz
, dev_desc
->hwpart
);
153 static void fb_mmc_boot1_ops(struct blk_desc
*dev_desc
, void *buffer
,
154 u32 buff_sz
, char *response
)
160 // To operate on EMMC_BOOT1 (mmc0boot0), we first change the hwpart
161 if (blk_dselect_hwpart(dev_desc
, 1)) {
162 pr_err("Failed to select hwpart\n");
163 fastboot_fail("Failed to select hwpart", response
);
167 if (buffer
) { /* flash */
169 /* determine number of blocks to write */
170 blksz
= dev_desc
->blksz
;
171 blkcnt
= ((buff_sz
+ (blksz
- 1)) & ~(blksz
- 1));
172 blkcnt
= lldiv(blkcnt
, blksz
);
174 if (blkcnt
> dev_desc
->lba
) {
175 pr_err("Image size too large\n");
176 fastboot_fail("Image size too large", response
);
180 debug("Start Flashing Image to EMMC_BOOT1...\n");
182 blks
= fb_mmc_blk_write(dev_desc
, 0, blkcnt
, buffer
);
184 if (blks
!= blkcnt
) {
185 pr_err("Failed to write EMMC_BOOT1\n");
186 fastboot_fail("Failed to write EMMC_BOOT1", response
);
190 printf("........ wrote %lu bytes to EMMC_BOOT1\n",
193 if (fb_mmc_erase_mmc_hwpart(dev_desc
)) {
194 fastboot_fail("Failed to erase EMMC_BOOT1", response
);
199 fastboot_okay(NULL
, response
);
203 #ifdef CONFIG_ANDROID_BOOT_IMAGE
205 * Read Android boot image header from boot partition.
207 * @param[in] dev_desc MMC device descriptor
208 * @param[in] info Boot partition info
209 * @param[out] hdr Where to store read boot image header
211 * @return Boot image header sectors count or 0 on error
213 static lbaint_t
fb_mmc_get_boot_header(struct blk_desc
*dev_desc
,
214 disk_partition_t
*info
,
215 struct andr_img_hdr
*hdr
,
218 ulong sector_size
; /* boot partition sector size */
219 lbaint_t hdr_sectors
; /* boot image header sectors count */
222 /* Calculate boot image sectors count */
223 sector_size
= info
->blksz
;
224 hdr_sectors
= DIV_ROUND_UP(sizeof(struct andr_img_hdr
), sector_size
);
225 if (hdr_sectors
== 0) {
226 pr_err("invalid number of boot sectors: 0\n");
227 fastboot_fail("invalid number of boot sectors: 0", response
);
231 /* Read the boot image header */
232 res
= blk_dread(dev_desc
, info
->start
, hdr_sectors
, (void *)hdr
);
233 if (res
!= hdr_sectors
) {
234 pr_err("cannot read header from boot partition\n");
235 fastboot_fail("cannot read header from boot partition",
240 /* Check boot header magic string */
241 res
= android_image_check_header(hdr
);
243 pr_err("bad boot image magic\n");
244 fastboot_fail("boot partition not initialized", response
);
252 * Write downloaded zImage to boot partition and repack it properly.
254 * @param dev_desc MMC device descriptor
255 * @param download_buffer Address to fastboot buffer with zImage in it
256 * @param download_bytes Size of fastboot buffer, in bytes
258 * @return 0 on success or -1 on error
260 static int fb_mmc_update_zimage(struct blk_desc
*dev_desc
,
261 void *download_buffer
,
265 uintptr_t hdr_addr
; /* boot image header address */
266 struct andr_img_hdr
*hdr
; /* boot image header */
267 lbaint_t hdr_sectors
; /* boot image header sectors */
269 u32 ramdisk_sector_start
;
271 u32 kernel_sector_start
;
273 u32 sectors_per_page
;
274 disk_partition_t info
;
277 puts("Flashing zImage\n");
279 /* Get boot partition info */
280 res
= part_get_info_by_name(dev_desc
, BOOT_PARTITION_NAME
, &info
);
282 pr_err("cannot find boot partition\n");
283 fastboot_fail("cannot find boot partition", response
);
287 /* Put boot image header in fastboot buffer after downloaded zImage */
288 hdr_addr
= (uintptr_t)download_buffer
+ ALIGN(download_bytes
, PAGE_SIZE
);
289 hdr
= (struct andr_img_hdr
*)hdr_addr
;
291 /* Read boot image header */
292 hdr_sectors
= fb_mmc_get_boot_header(dev_desc
, &info
, hdr
, response
);
293 if (hdr_sectors
== 0) {
294 pr_err("unable to read boot image header\n");
295 fastboot_fail("unable to read boot image header", response
);
299 /* Check if boot image has second stage in it (we don't support it) */
300 if (hdr
->second_size
> 0) {
301 pr_err("moving second stage is not supported yet\n");
302 fastboot_fail("moving second stage is not supported yet",
307 /* Extract ramdisk location */
308 sectors_per_page
= hdr
->page_size
/ info
.blksz
;
309 ramdisk_sector_start
= info
.start
+ sectors_per_page
;
310 ramdisk_sector_start
+= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
312 ramdisk_sectors
= DIV_ROUND_UP(hdr
->ramdisk_size
, hdr
->page_size
) *
315 /* Read ramdisk and put it in fastboot buffer after boot image header */
316 ramdisk_buffer
= (u8
*)hdr
+ (hdr_sectors
* info
.blksz
);
317 res
= blk_dread(dev_desc
, ramdisk_sector_start
, ramdisk_sectors
,
319 if (res
!= ramdisk_sectors
) {
320 pr_err("cannot read ramdisk from boot partition\n");
321 fastboot_fail("cannot read ramdisk from boot partition",
326 /* Write new kernel size to boot image header */
327 hdr
->kernel_size
= download_bytes
;
328 res
= blk_dwrite(dev_desc
, info
.start
, hdr_sectors
, (void *)hdr
);
330 pr_err("cannot writeback boot image header\n");
331 fastboot_fail("cannot write back boot image header", response
);
335 /* Write the new downloaded kernel */
336 kernel_sector_start
= info
.start
+ sectors_per_page
;
337 kernel_sectors
= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
339 res
= blk_dwrite(dev_desc
, kernel_sector_start
, kernel_sectors
,
342 pr_err("cannot write new kernel\n");
343 fastboot_fail("cannot write new kernel", response
);
347 /* Write the saved ramdisk back */
348 ramdisk_sector_start
= info
.start
+ sectors_per_page
;
349 ramdisk_sector_start
+= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
351 res
= blk_dwrite(dev_desc
, ramdisk_sector_start
, ramdisk_sectors
,
354 pr_err("cannot write back original ramdisk\n");
355 fastboot_fail("cannot write back original ramdisk", response
);
359 puts("........ zImage was updated in boot partition\n");
360 fastboot_okay(NULL
, response
);
366 * fastboot_mmc_get_part_info() - Lookup eMMC partion by name
368 * @part_name: Named partition to lookup
369 * @dev_desc: Pointer to returned blk_desc pointer
370 * @part_info: Pointer to returned disk_partition_t
371 * @response: Pointer to fastboot response buffer
373 int fastboot_mmc_get_part_info(const char *part_name
,
374 struct blk_desc
**dev_desc
,
375 disk_partition_t
*part_info
, char *response
)
379 *dev_desc
= blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV
);
381 fastboot_fail("block device not found", response
);
384 if (!part_name
|| !strcmp(part_name
, "")) {
385 fastboot_fail("partition not given", response
);
389 r
= part_get_info_by_name_or_alias(*dev_desc
, part_name
, part_info
);
391 fastboot_fail("partition not found", response
);
399 * fastboot_mmc_flash_write() - Write image to eMMC for fastboot
401 * @cmd: Named partition to write image to
402 * @download_buffer: Pointer to image data
403 * @download_bytes: Size of image data
404 * @response: Pointer to fastboot response buffer
406 void fastboot_mmc_flash_write(const char *cmd
, void *download_buffer
,
407 u32 download_bytes
, char *response
)
409 struct blk_desc
*dev_desc
;
410 disk_partition_t info
;
412 dev_desc
= blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV
);
413 if (!dev_desc
|| dev_desc
->type
== DEV_TYPE_UNKNOWN
) {
414 pr_err("invalid mmc device\n");
415 fastboot_fail("invalid mmc device", response
);
419 #ifdef CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT
420 if (strcmp(cmd
, CONFIG_FASTBOOT_MMC_BOOT1_NAME
) == 0) {
421 fb_mmc_boot1_ops(dev_desc
, download_buffer
,
422 download_bytes
, response
);
427 #if CONFIG_IS_ENABLED(EFI_PARTITION)
428 #ifndef CONFIG_FASTBOOT_MMC_USER_NAME
429 if (strcmp(cmd
, CONFIG_FASTBOOT_GPT_NAME
) == 0) {
431 if (strcmp(cmd
, CONFIG_FASTBOOT_GPT_NAME
) == 0 ||
432 strcmp(cmd
, CONFIG_FASTBOOT_MMC_USER_NAME
) == 0) {
434 printf("%s: updating MBR, Primary and Backup GPT(s)\n",
436 if (is_valid_gpt_buf(dev_desc
, download_buffer
)) {
437 printf("%s: invalid GPT - refusing to write to flash\n",
439 fastboot_fail("invalid GPT partition", response
);
442 if (write_mbr_and_gpt_partitions(dev_desc
, download_buffer
)) {
443 printf("%s: writing GPT partitions failed\n", __func__
);
444 fastboot_fail("writing GPT partitions failed",
448 printf("........ success\n");
449 fastboot_okay(NULL
, response
);
454 #if CONFIG_IS_ENABLED(DOS_PARTITION)
455 if (strcmp(cmd
, CONFIG_FASTBOOT_MBR_NAME
) == 0) {
456 printf("%s: updating MBR\n", __func__
);
457 if (is_valid_dos_buf(download_buffer
)) {
458 printf("%s: invalid MBR - refusing to write to flash\n",
460 fastboot_fail("invalid MBR partition", response
);
463 if (write_mbr_partition(dev_desc
, download_buffer
)) {
464 printf("%s: writing MBR partition failed\n", __func__
);
465 fastboot_fail("writing MBR partition failed",
469 printf("........ success\n");
470 fastboot_okay(NULL
, response
);
475 #ifdef CONFIG_ANDROID_BOOT_IMAGE
476 if (strncasecmp(cmd
, "zimage", 6) == 0) {
477 fb_mmc_update_zimage(dev_desc
, download_buffer
,
478 download_bytes
, response
);
483 if (part_get_info_by_name_or_alias(dev_desc
, cmd
, &info
) < 0) {
484 pr_err("cannot find partition: '%s'\n", cmd
);
485 fastboot_fail("cannot find partition", response
);
489 if (is_sparse_image(download_buffer
)) {
490 struct fb_mmc_sparse sparse_priv
;
491 struct sparse_storage sparse
;
494 sparse_priv
.dev_desc
= dev_desc
;
496 sparse
.blksz
= info
.blksz
;
497 sparse
.start
= info
.start
;
498 sparse
.size
= info
.size
;
499 sparse
.write
= fb_mmc_sparse_write
;
500 sparse
.reserve
= fb_mmc_sparse_reserve
;
501 sparse
.mssg
= fastboot_fail
;
503 printf("Flashing sparse image at offset " LBAFU
"\n",
506 sparse
.priv
= &sparse_priv
;
507 err
= write_sparse_image(&sparse
, cmd
, download_buffer
,
510 fastboot_okay(NULL
, response
);
512 write_raw_image(dev_desc
, &info
, cmd
, download_buffer
,
513 download_bytes
, response
);
518 * fastboot_mmc_flash_erase() - Erase eMMC for fastboot
520 * @cmd: Named partition to erase
521 * @response: Pointer to fastboot response buffer
523 void fastboot_mmc_erase(const char *cmd
, char *response
)
526 struct blk_desc
*dev_desc
;
527 disk_partition_t info
;
528 lbaint_t blks
, blks_start
, blks_size
, grp_size
;
529 struct mmc
*mmc
= find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV
);
532 pr_err("invalid mmc device\n");
533 fastboot_fail("invalid mmc device", response
);
537 dev_desc
= blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV
);
538 if (!dev_desc
|| dev_desc
->type
== DEV_TYPE_UNKNOWN
) {
539 pr_err("invalid mmc device\n");
540 fastboot_fail("invalid mmc device", response
);
544 #ifdef CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT
545 if (strcmp(cmd
, CONFIG_FASTBOOT_MMC_BOOT1_NAME
) == 0) {
546 /* erase EMMC boot1 */
547 fb_mmc_boot1_ops(dev_desc
, NULL
, 0, response
);
552 #ifdef CONFIG_FASTBOOT_MMC_USER_NAME
553 if (strcmp(cmd
, CONFIG_FASTBOOT_MMC_USER_NAME
) == 0) {
554 /* erase EMMC userdata */
555 if (fb_mmc_erase_mmc_hwpart(dev_desc
))
556 fastboot_fail("Failed to erase EMMC_USER", response
);
558 fastboot_okay(NULL
, response
);
563 ret
= part_get_info_by_name_or_alias(dev_desc
, cmd
, &info
);
565 pr_err("cannot find partition: '%s'\n", cmd
);
566 fastboot_fail("cannot find partition", response
);
570 /* Align blocks to erase group size to avoid erasing other partitions */
571 grp_size
= mmc
->erase_grp_size
;
572 blks_start
= (info
.start
+ grp_size
- 1) & ~(grp_size
- 1);
573 if (info
.size
>= grp_size
)
574 blks_size
= (info
.size
- (blks_start
- info
.start
)) &
579 printf("Erasing blocks " LBAFU
" to " LBAFU
" due to alignment\n",
580 blks_start
, blks_start
+ blks_size
);
582 blks
= fb_mmc_blk_write(dev_desc
, blks_start
, blks_size
, NULL
);
584 if (blks
!= blks_size
) {
585 pr_err("failed erasing from device %d\n", dev_desc
->devnum
);
586 fastboot_fail("failed erasing from device", response
);
590 printf("........ erased " LBAFU
" bytes from '%s'\n",
591 blks_size
* info
.blksz
, cmd
);
592 fastboot_okay(NULL
, response
);