Android 10 adds support for dynamic partitions and in order to support
them userspace fastboot must be used[1]. New tool called fastbootd is included
into recovery image.
Userspace fastboot works from recovery and is launched if:
1) - Dynamic partitioning is enabled
2) - Boot control block has 'boot-fastboot' value into command field
The bootloader is expected[2] to load and boot into the recovery image upon
seeing boot-fastboot in the BCB command. Recovery then parses the BCB
message and switches to fastbootd mode.
Please note that boot script is expected to handle 'boot-fastboot' command
in BCB and load into recovery mode.
Bootloader must support[3] 'reboot fastboot' command which should reboot
device into userspace fastboot to accomodate those changes.
Another command that bootloader must support[3] is 'reboot recovery'. This
command should simply reboot device into recovery mode.
Changes since v3[6]:
* Fixed indentation in Kconfig
* Fixed default value for FASTBOOT_USE_BCB_SET_REBOOT_FLAG
* Extended help message for FASTBOOT_USE_BCB_SET_REBOOT_FLAG
Changes since v2[5]:
* Split patch 1 into two separate patches:
* Patch 1 extends fastboot_set_reboot_flag arguments with reboot reason
* Patch 2 adds new reboot reasons for fastbootd and recovery
* Added name for fastboot_rebot_reason enum
* Replaced switch inside fastboot_set_reboot_flag with table lookup
* Moved fastboot_set_reboot_flag BCB implementation to separate file
Changes since v1[4]:
* Added missing handling of reboot commands for network protocol
* Extended fastboot_set_reboot_flag command to accept reboot reason
* Made former fastboot_set_flag function as an optional implementation of
fastboot_set_reboot_flag which could be turned on by Kconfig
[1] - https://source.android.com/devices/bootloader/fastbootd
[2] - https://source.android.com/devices/bootloader/fastbootd#unified_fastboot_and_recovery
[3] - https://source.android.com/devices/bootloader/fastbootd#modifications_to_the_bootloader
[4] - http://patchwork.ozlabs.org/project/uboot/cover/cover.1590539734.git.roman.kovalivskyi at globallogic.com/
[5] - http://patchwork.ozlabs.org/project/uboot/cover/cover.1591254465.git.roman.kovalivskyi at globallogic.com/
[6] - http://patchwork.ozlabs.org/project/uboot/cover/cover.1591806433.git.roman.kovalivskyi at globallogic.com/
Roman Kovalivskyi (3):
fastboot: Extend fastboot_set_reboot_flag with reboot reason
fastboot: Add support for 'reboot fastboot' command
fastboot: Add default fastboot_set_reboot_flag implementation
arch/arm/mach-meson/board-common.c | 6 +++-
arch/arm/mach-rockchip/board.c | 6 +++-
board/amazon/kc1/kc1.c | 6 +++-
board/lg/sniper/sniper.c | 6 +++-
board/ti/am57xx/board.c | 6 +++-
board/ti/dra7xx/evm.c | 6 +++-
drivers/fastboot/Kconfig | 12 ++++++++
drivers/fastboot/Makefile | 1 +
drivers/fastboot/fb_bcb_impl.c | 48 ++++++++++++++++++++++++++++++
drivers/fastboot/fb_command.c | 40 ++++++++++++++++++++++++-
drivers/fastboot/fb_common.c | 2 +-
drivers/usb/gadget/f_fastboot.c | 2 ++
include/fastboot.h | 14 ++++++++-
net/fastboot.c | 2 ++
14 files changed, 148 insertions(+), 9 deletions(-)
create mode 100644 drivers/fastboot/fb_bcb_impl.c