2 * Copyright 2014 Broadcom Corporation.
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <image-sparse.h>
16 #include <linux/compat.h>
17 #include <android_image.h>
20 * FIXME: Ensure we always set these names via Kconfig once xxx_PARTITION is
23 #ifndef CONFIG_FASTBOOT_GPT_NAME
24 #define CONFIG_FASTBOOT_GPT_NAME "gpt"
28 #ifndef CONFIG_FASTBOOT_MBR_NAME
29 #define CONFIG_FASTBOOT_MBR_NAME "mbr"
32 #define BOOT_PARTITION_NAME "boot"
34 struct fb_mmc_sparse
{
35 struct blk_desc
*dev_desc
;
38 static int part_get_info_by_name_or_alias(struct blk_desc
*dev_desc
,
39 const char *name
, disk_partition_t
*info
)
43 ret
= part_get_info_by_name(dev_desc
, name
, info
);
45 /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
46 char env_alias_name
[25 + 32 + 1];
47 char *aliased_part_name
;
50 strcpy(env_alias_name
, "fastboot_partition_alias_");
51 strncat(env_alias_name
, name
, 32);
52 aliased_part_name
= getenv(env_alias_name
);
53 if (aliased_part_name
!= NULL
)
54 ret
= part_get_info_by_name(dev_desc
,
55 aliased_part_name
, info
);
60 static lbaint_t
fb_mmc_sparse_write(struct sparse_storage
*info
,
61 lbaint_t blk
, lbaint_t blkcnt
, const void *buffer
)
63 struct fb_mmc_sparse
*sparse
= info
->priv
;
64 struct blk_desc
*dev_desc
= sparse
->dev_desc
;
66 return blk_dwrite(dev_desc
, blk
, blkcnt
, buffer
);
69 static lbaint_t
fb_mmc_sparse_reserve(struct sparse_storage
*info
,
70 lbaint_t blk
, lbaint_t blkcnt
)
75 static void write_raw_image(struct blk_desc
*dev_desc
, disk_partition_t
*info
,
76 const char *part_name
, void *buffer
,
77 unsigned int download_bytes
)
82 /* determine number of blocks to write */
83 blkcnt
= ((download_bytes
+ (info
->blksz
- 1)) & ~(info
->blksz
- 1));
84 blkcnt
= lldiv(blkcnt
, info
->blksz
);
86 if (blkcnt
> info
->size
) {
87 error("too large for partition: '%s'\n", part_name
);
88 fastboot_fail("too large for partition");
92 puts("Flashing Raw Image\n");
94 blks
= blk_dwrite(dev_desc
, info
->start
, blkcnt
, buffer
);
96 error("failed writing to device %d\n", dev_desc
->devnum
);
97 fastboot_fail("failed writing to device");
101 printf("........ wrote " LBAFU
" bytes to '%s'\n", blkcnt
* info
->blksz
,
106 #ifdef CONFIG_ANDROID_BOOT_IMAGE
108 * Read Android boot image header from boot partition.
110 * @param[in] dev_desc MMC device descriptor
111 * @param[in] info Boot partition info
112 * @param[out] hdr Where to store read boot image header
114 * @return Boot image header sectors count or 0 on error
116 static lbaint_t
fb_mmc_get_boot_header(struct blk_desc
*dev_desc
,
117 disk_partition_t
*info
,
118 struct andr_img_hdr
*hdr
)
120 ulong sector_size
; /* boot partition sector size */
121 lbaint_t hdr_sectors
; /* boot image header sectors count */
124 /* Calculate boot image sectors count */
125 sector_size
= info
->blksz
;
126 hdr_sectors
= DIV_ROUND_UP(sizeof(struct andr_img_hdr
), sector_size
);
127 if (hdr_sectors
== 0) {
128 error("invalid number of boot sectors: 0");
129 fastboot_fail("invalid number of boot sectors: 0");
133 /* Read the boot image header */
134 res
= blk_dread(dev_desc
, info
->start
, hdr_sectors
, (void *)hdr
);
136 error("cannot read header from boot partition");
137 fastboot_fail("cannot read header from boot partition");
141 /* Check boot header magic string */
142 res
= android_image_check_header(hdr
);
144 error("bad boot image magic");
145 fastboot_fail("boot partition not initialized");
153 * Write downloaded zImage to boot partition and repack it properly.
155 * @param dev_desc MMC device descriptor
156 * @param download_buffer Address to fastboot buffer with zImage in it
157 * @param download_bytes Size of fastboot buffer, in bytes
159 * @return 0 on success or -1 on error
161 static int fb_mmc_update_zimage(struct blk_desc
*dev_desc
,
162 void *download_buffer
,
163 unsigned int download_bytes
)
165 u32 hdr_addr
; /* boot image header address */
166 struct andr_img_hdr
*hdr
; /* boot image header */
167 lbaint_t hdr_sectors
; /* boot image header sectors */
169 u32 ramdisk_sector_start
;
171 u32 kernel_sector_start
;
173 u32 sectors_per_page
;
174 disk_partition_t info
;
177 puts("Flashing zImage\n");
179 /* Get boot partition info */
180 res
= part_get_info_by_name(dev_desc
, BOOT_PARTITION_NAME
, &info
);
182 error("cannot find boot partition");
183 fastboot_fail("cannot find boot partition");
187 /* Put boot image header in fastboot buffer after downloaded zImage */
188 hdr_addr
= (u32
)download_buffer
+ ALIGN(download_bytes
, PAGE_SIZE
);
189 hdr
= (struct andr_img_hdr
*)hdr_addr
;
191 /* Read boot image header */
192 hdr_sectors
= fb_mmc_get_boot_header(dev_desc
, &info
, hdr
);
193 if (hdr_sectors
== 0) {
194 error("unable to read boot image header");
195 fastboot_fail("unable to read boot image header");
199 /* Check if boot image has second stage in it (we don't support it) */
200 if (hdr
->second_size
> 0) {
201 error("moving second stage is not supported yet");
202 fastboot_fail("moving second stage is not supported yet");
206 /* Extract ramdisk location */
207 sectors_per_page
= hdr
->page_size
/ info
.blksz
;
208 ramdisk_sector_start
= info
.start
+ sectors_per_page
;
209 ramdisk_sector_start
+= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
211 ramdisk_sectors
= DIV_ROUND_UP(hdr
->ramdisk_size
, hdr
->page_size
) *
214 /* Read ramdisk and put it in fastboot buffer after boot image header */
215 ramdisk_buffer
= (u8
*)hdr
+ (hdr_sectors
* info
.blksz
);
216 res
= blk_dread(dev_desc
, ramdisk_sector_start
, ramdisk_sectors
,
219 error("cannot read ramdisk from boot partition");
220 fastboot_fail("cannot read ramdisk from boot partition");
224 /* Write new kernel size to boot image header */
225 hdr
->kernel_size
= download_bytes
;
226 res
= blk_dwrite(dev_desc
, info
.start
, hdr_sectors
, (void *)hdr
);
228 error("cannot writeback boot image header");
229 fastboot_fail("cannot write back boot image header");
233 /* Write the new downloaded kernel */
234 kernel_sector_start
= info
.start
+ sectors_per_page
;
235 kernel_sectors
= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
237 res
= blk_dwrite(dev_desc
, kernel_sector_start
, kernel_sectors
,
240 error("cannot write new kernel");
241 fastboot_fail("cannot write new kernel");
245 /* Write the saved ramdisk back */
246 ramdisk_sector_start
= info
.start
+ sectors_per_page
;
247 ramdisk_sector_start
+= DIV_ROUND_UP(hdr
->kernel_size
, hdr
->page_size
) *
249 res
= blk_dwrite(dev_desc
, ramdisk_sector_start
, ramdisk_sectors
,
252 error("cannot write back original ramdisk");
253 fastboot_fail("cannot write back original ramdisk");
257 puts("........ zImage was updated in boot partition\n");
263 void fb_mmc_flash_write(const char *cmd
, void *download_buffer
,
264 unsigned int download_bytes
)
266 struct blk_desc
*dev_desc
;
267 disk_partition_t info
;
269 dev_desc
= blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV
);
270 if (!dev_desc
|| dev_desc
->type
== DEV_TYPE_UNKNOWN
) {
271 error("invalid mmc device\n");
272 fastboot_fail("invalid mmc device");
276 #if CONFIG_IS_ENABLED(EFI_PARTITION)
277 if (strcmp(cmd
, CONFIG_FASTBOOT_GPT_NAME
) == 0) {
278 printf("%s: updating MBR, Primary and Backup GPT(s)\n",
280 if (is_valid_gpt_buf(dev_desc
, download_buffer
)) {
281 printf("%s: invalid GPT - refusing to write to flash\n",
283 fastboot_fail("invalid GPT partition");
286 if (write_mbr_and_gpt_partitions(dev_desc
, download_buffer
)) {
287 printf("%s: writing GPT partitions failed\n", __func__
);
288 fastboot_fail("writing GPT partitions failed");
291 printf("........ success\n");
297 #if CONFIG_IS_ENABLED(DOS_PARTITION)
298 if (strcmp(cmd
, CONFIG_FASTBOOT_MBR_NAME
) == 0) {
299 printf("%s: updating MBR\n", __func__
);
300 if (is_valid_dos_buf(download_buffer
)) {
301 printf("%s: invalid MBR - refusing to write to flash\n",
303 fastboot_fail("invalid MBR partition");
306 if (write_mbr_partition(dev_desc
, download_buffer
)) {
307 printf("%s: writing MBR partition failed\n", __func__
);
308 fastboot_fail("writing MBR partition failed");
311 printf("........ success\n");
317 #ifdef CONFIG_ANDROID_BOOT_IMAGE
318 if (strncasecmp(cmd
, "zimage", 6) == 0) {
319 fb_mmc_update_zimage(dev_desc
, download_buffer
, download_bytes
);
324 if (part_get_info_by_name_or_alias(dev_desc
, cmd
, &info
) < 0) {
325 error("cannot find partition: '%s'\n", cmd
);
326 fastboot_fail("cannot find partition");
330 if (is_sparse_image(download_buffer
)) {
331 struct fb_mmc_sparse sparse_priv
;
332 struct sparse_storage sparse
;
334 sparse_priv
.dev_desc
= dev_desc
;
336 sparse
.blksz
= info
.blksz
;
337 sparse
.start
= info
.start
;
338 sparse
.size
= info
.size
;
339 sparse
.write
= fb_mmc_sparse_write
;
340 sparse
.reserve
= fb_mmc_sparse_reserve
;
342 printf("Flashing sparse image at offset " LBAFU
"\n",
345 sparse
.priv
= &sparse_priv
;
346 write_sparse_image(&sparse
, cmd
, download_buffer
,
349 write_raw_image(dev_desc
, &info
, cmd
, download_buffer
,
354 void fb_mmc_erase(const char *cmd
)
357 struct blk_desc
*dev_desc
;
358 disk_partition_t info
;
359 lbaint_t blks
, blks_start
, blks_size
, grp_size
;
360 struct mmc
*mmc
= find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV
);
363 error("invalid mmc device");
364 fastboot_fail("invalid mmc device");
368 dev_desc
= blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV
);
369 if (!dev_desc
|| dev_desc
->type
== DEV_TYPE_UNKNOWN
) {
370 error("invalid mmc device");
371 fastboot_fail("invalid mmc device");
375 ret
= part_get_info_by_name_or_alias(dev_desc
, cmd
, &info
);
377 error("cannot find partition: '%s'", cmd
);
378 fastboot_fail("cannot find partition");
382 /* Align blocks to erase group size to avoid erasing other partitions */
383 grp_size
= mmc
->erase_grp_size
;
384 blks_start
= (info
.start
+ grp_size
- 1) & ~(grp_size
- 1);
385 if (info
.size
>= grp_size
)
386 blks_size
= (info
.size
- (blks_start
- info
.start
)) &
391 printf("Erasing blocks " LBAFU
" to " LBAFU
" due to alignment\n",
392 blks_start
, blks_start
+ blks_size
);
394 blks
= blk_derase(dev_desc
, blks_start
, blks_size
);
395 if (blks
!= blks_size
) {
396 error("failed erasing from device %d", dev_desc
->devnum
);
397 fastboot_fail("failed erasing from device");
401 printf("........ erased " LBAFU
" bytes from '%s'\n",
402 blks_size
* info
.blksz
, cmd
);