u-boot.git/drivers/fastboot, branch master

fastboot: mmc: make boot partition offset configurable

2026-02-19T10:27:51+00:00

i.MX8QXP rev C.0 requires boot container stored at offset 0KB
for eMMC, while i.MX8QXP pre C.0 requires boot container stored
at offset 32KB for eMMC.

To use one U-Boot binary to support different chip revisions,
introduce fb_mmc_get_boot_offset() to allow override the default
offset when writing to eMMC boot partitions.

This enables support for devices with non-standard boot partition
layouts, such as those requiring an offset for correct bootloader
placement.

Signed-off-by: Adrian Freihofer 
Signed-off-by: Heiko Schocher 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20260217103604.71029-2-hs@nabladev.com
Signed-off-by: Mattijs Korpershoek

fastboot: integrate block flashing back-end

2025-11-24T09:51:17+00:00

1. Get partition info/size
2. Erase partition
3. Flash partition
4. BCB

Make FASTBOOT_FLASH also depend on BLK, but make sure
it doesn't affect SUNXI and ROCKCHIP platforms since they
default to y already.

Make it only default on SUNXI when MMC or NAND is enabled,
so it doesn't break the CHIP & Nintendo boards, and for ROCKCHIP
when MMC is enabled.

Signed-off-by: Dmitrii Merkurev 
Reviewed-by: Mattijs Korpershoek 
Tested-by: Mattijs Korpershoek 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20251121-topic-fastboot-blk-v7-3-9589d902fc91@linaro.org
Signed-off-by: Mattijs Korpershoek

fastboot: blk: switch emmc to use the block helpers

2025-11-24T09:51:17+00:00

Switch the mmc backend to this new shared block helpers,
reducing block logic and only leaving MMC specific logic.

Signed-off-by: Dmitrii Merkurev 
Reviewed-by: Mattijs Korpershoek 
Tested-by: Mattijs Korpershoek 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20251121-topic-fastboot-blk-v7-2-9589d902fc91@linaro.org
Signed-off-by: Mattijs Korpershoek

fastboot: blk: introduce fastboot block flashing support

2025-11-24T09:51:16+00:00

Introduce fastboot block flashing functions and helpers
to be shared with the MMC implementation.

The write logic comes from the mmc implementation, while
the partition lookup is much simpler and could be extended.

For the erase logic, allmost no block drivers exposes the
erase operation, except mmc & virtio, so in order to allow
erasiong any partition a soft-erase logic has been added
to write zero-ed buffers in a loop.

Signed-off-by: Dmitrii Merkurev 
Reviewed-by: Mattijs Korpershoek 
Tested-by: Mattijs Korpershoek 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20251121-topic-fastboot-blk-v7-1-9589d902fc91@linaro.org
Signed-off-by: Mattijs Korpershoek

fastboot: Fix has-slot command always returning yes for fb_nand

2025-09-30T09:48:51+00:00

The issue was a mismatch in return value conventions between functions:
- getvar_get_part_info() expects >= 0 for success
- fb_nand_lookup() returns 0 on success, 1 on failure (from
mtdparts_init and find_dev_and_part)

When partition didn't exist, fb_nand_lookup returned 1, but
fastboot_nand_get_part_info passed it directly to getvar_get_part_info,
which treated 1 >= 0 as success, causing has-slot to always return yes.

Fix by converting positive return values to -ENOENT in
fastboot_nand_get_part_info to match the expected error convention.

Signed-off-by: Chance Yang 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20250826-master-v2-1-30b787a2f9fd@kneron.us
Signed-off-by: Mattijs Korpershoek

fastboot: Fix off by 1 error

2025-07-22T17:30:14+00:00

strlen only reports length of string not including terminating 0 byte
but this has to be included in length of receiving buffer on copy so
adjust length check to be correct.

This issue found by Smatch.

Signed-off-by: Andrew Goodbody 
Reviewed-by: Mattijs Korpershoek

drivers: fastboot: Add support for SPI flash memory

2025-07-22T17:30:14+00:00

Fastboot currently supports MMC and NAND flash devices. Similarly,
extend the support to SPI flash memories.

Note that in this initial implementation, partitions on the device are
not supported yet, but raw partitions can be set in U-Boot environment.

To define a raw partition descriptor, add an environment variable
similar to the MMC case:

```
fastboot_raw_partition_= 
```

for example:

```
fastboot_raw_partition_boot=0x0 0x1000000
```

Signed-off-by: Ariel D'Alessandro 
Reviewed-by: Mattijs Korpershoek

fastboot: lift restrictions on !NET_LWIP for USB

2025-04-10T07:59:37+00:00

Fastboot works either over TCP, UDP or USB. The latter doesn't have
anything to do with networking, thus should work just fine with
regardless which network stack is selected. In practice, header symbols
are used inside common code paths. Add some ifdeffery to guard against
that.

This will make fastboot over USB work with the new LWIP stack.

Signed-off-by: Michael Walle 
Reviewed-by: Jerome Forissier 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20250312073655.2281377-1-mwalle@kernel.org
Signed-off-by: Mattijs Korpershoek

fastboot: annotate switch/case fallthrough case

2025-04-08T22:23:51+00:00

The fastboot command handling uses an implicit switch/case fallthrough
when receiving the OEM_CONSOLE command, but when this command is not
enabled in Kconfig, to report this command as unknown.

Add our "fallthrough;" statement-like macro before the default branch in
the fastboot code, to avoid a warning when GCC's -Wimplicit-fallthrough
warning option is enabled.

Signed-off-by: Andre Przywara 
Reviewed-by: Mattijs Korpershoek

fastboot: Fix warning when CONFIG_SYS_64BIT_LBA is enable

2025-01-31T07:57:39+00:00

If CONFIG_SYS_64BIT_LBA is enable, following compilation warning is
triggered:

 CC      drivers/fastboot/fb_mmc.o
../drivers/fastboot/fb_mmc.c: In function 'fb_mmc_erase_mmc_hwpart':
../drivers/fastboot/fb_mmc.c:215:35: warning: format '%lu' expects
argument of type 'long unsigned int', but argument 2 has type
'long long unsigned int' [-Wformat=]
  215 |         printf("........ erased %lu bytes from mmc hwpart[%u]\n",
      |                                 ~~^
      |                                   |
      |                                   long unsigned int
      |                                 %llu
  216 |                dev_desc->lba * dev_desc->blksz, dev_desc->hwpart);
      |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                              |
      |                              long long unsigned int
../drivers/fastboot/fb_mmc.c: In function 'fb_mmc_boot_ops':
../drivers/fastboot/fb_mmc.c:261:42: warning: format '%lu' expects
argument of type 'long unsigned int', but argument 2 has type
'long long unsigned int' [-Wformat=]
  261 |                 printf("........ wrote %lu bytes to EMMC_BOOT%d\n",
      |                                        ~~^
      |                                          |
      |                                          long unsigned int
      |                                        %llu
  262 |                        blkcnt * blksz, hwpart);
      |                        ~~~~~~~~~~~~~~
      |                               |
      |                               long long unsigned int

Signed-off-by: Patrice Chotard 
Reviewed-by: Mattijs Korpershoek 
Acked-by: Mattijs Korpershoek 
Reviewed-by: Patrick Delaunay