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fastboot: Add support for 'reboot fastboot' command 

Android 10 adds support for dynamic partitions and in order to support
this userspace fastboot must be used[1]. New tool fastbootd is
included into recovery.

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 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[2].

Please note that boot script is expected to handle 'boot-fastboot'
command in BCB and load into recovery mode.

Bootloader must support 'reboot fastboot' command which should reboot
device into userspace fastboot to accomodate those changes[3].

Another command that bootloader must support[3] is 'reboot recovery'. This
command should simply reboot device into recovery mode.

[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

Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Change-Id: I9d2bdc9a6f6f31ea98572fe155e1cc8341e9af76
This commit is contained in:
Roman Kovalivskyi 2020-07-28 23:35:33 +03:00 committed by Marek Vasut
parent 851737ab89
commit 2b2a771b40
4 changed files with 46 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/fastboot/fb_command.c
View File

@ -37,6 +37,8 @@ static void flash(char *, char *);
static void erase(char *, char *);
#endif
static void reboot_bootloader(char *, char *);
static void reboot_fastbootd(char *, char *);
static void reboot_recovery(char *, char *);
#if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT)
static void oem_format(char *, char *);
#endif
@ -79,6 +81,14 @@ static const struct {
.command = "reboot-bootloader",
.dispatch = reboot_bootloader
},
[FASTBOOT_COMMAND_REBOOT_FASTBOOTD] = {
.command = "reboot-fastboot",
.dispatch = reboot_fastbootd
},
[FASTBOOT_COMMAND_REBOOT_RECOVERY] = {
.command = "reboot-recovery",
.dispatch = reboot_recovery
},
[FASTBOOT_COMMAND_SET_ACTIVE] = {
.command = "set_active",
.dispatch = okay
@ -313,6 +323,34 @@ static void reboot_bootloader(char *cmd_parameter, char *response)
fastboot_okay(NULL, response);
}
/**
* reboot_fastbootd() - Sets reboot fastboot flag.
*
* @cmd_parameter: Pointer to command parameter
* @response: Pointer to fastboot response buffer
*/
static void reboot_fastbootd(char *cmd_parameter, char *response)
{
if (fastboot_set_reboot_flag(FASTBOOT_REBOOT_REASON_FASTBOOTD))
fastboot_fail("Cannot set fastboot flag", response);
else
fastboot_okay(NULL, response);
}
/**
* reboot_recovery() - Sets reboot recovery flag.
*
* @cmd_parameter: Pointer to command parameter
* @response: Pointer to fastboot response buffer
*/
static void reboot_recovery(char *cmd_parameter, char *response)
{
if (fastboot_set_reboot_flag(FASTBOOT_REBOOT_REASON_RECOVERY))
fastboot_fail("Cannot set recovery flag", response);
else
fastboot_okay(NULL, response);
}
#if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT)
/**
* oem_format() - Execute the OEM format command

2
drivers/usb/gadget/f_fastboot.c
View File

@ -455,6 +455,8 @@ static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
case FASTBOOT_COMMAND_REBOOT:
case FASTBOOT_COMMAND_REBOOT_BOOTLOADER:
case FASTBOOT_COMMAND_REBOOT_FASTBOOTD:
case FASTBOOT_COMMAND_REBOOT_RECOVERY:
fastboot_func->in_req->complete = compl_do_reset;
break;
}

4
include/fastboot.h
View File

@ -32,6 +32,8 @@ enum {
FASTBOOT_COMMAND_CONTINUE,
FASTBOOT_COMMAND_REBOOT,
FASTBOOT_COMMAND_REBOOT_BOOTLOADER,
FASTBOOT_COMMAND_REBOOT_FASTBOOTD,
FASTBOOT_COMMAND_REBOOT_RECOVERY,
FASTBOOT_COMMAND_SET_ACTIVE,
#if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT)
FASTBOOT_COMMAND_OEM_FORMAT,
@ -45,6 +47,8 @@ enum {
*/
enum fastboot_reboot_reason {
FASTBOOT_REBOOT_REASON_BOOTLOADER,
FASTBOOT_REBOOT_REASON_FASTBOOTD,
FASTBOOT_REBOOT_REASON_RECOVERY,
FASTBOOT_REBOOT_REASONS_COUNT
};

2
net/fastboot.c
View File

@ -227,6 +227,8 @@ static void fastboot_send(struct fastboot_header header, char *fastboot_data,
case FASTBOOT_COMMAND_REBOOT:
case FASTBOOT_COMMAND_REBOOT_BOOTLOADER:
case FASTBOOT_COMMAND_REBOOT_FASTBOOTD:
case FASTBOOT_COMMAND_REBOOT_RECOVERY:
do_reset(NULL, 0, 0, NULL);
break;
}