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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
Roman Kovalivskyi 3 years ago
parent
commit
2b2a771b40
4 changed files with 46 additions and 0 deletions
  1. 38 0
      drivers/fastboot/fb_command.c
  2. 2 0
      drivers/usb/gadget/f_fastboot.c
  3. 4 0
      include/fastboot.h
  4. 2 0
      net/fastboot.c

+ 38 - 0
drivers/fastboot/fb_command.c

@@ -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 - 0
drivers/usb/gadget/f_fastboot.c

@@ -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 - 0
include/fastboot.h

@@ -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 - 0
net/fastboot.c

@@ -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;
 		}