Fastboot is a USB protocol for the host to communicate with the target android device at bootloader stage. Rockchip implements the fastboot protocol in u-boot, so ROCK960 use fastboot functionality.
There are 2 ways to go to fastboot mode
fastboot command to go to fastboot modeadb reboot fastboot or reboot fastboot to reboot to fastboot mode. Note: adb reboot bootloader or adb reboot loader will reboot to Rockusb mode, not fastboot mode.The fastboot host command can run on Windows/Linux/macOS. To check if the devices is in fastboot mode:
fastboot -i 0x2207 devices
fastboot getvar version #get the version
fastboot getvar version-bootloader #get the bootloader version
fastboot getvar unlocked #check if unlocked
fastboot getvar secure #check if locked
fastboot getvar product #get product name
fastboot getvar serialno #get serial number
fastboot getvar partition-type:<partition_name> #get partition type
fastboot getvar partition-size:<partition_name> #get partition size
fastboot getvar partition-offset:<partition_name> #get partition offset
fastboot oem unlock
fastboot oem unlock_accept
(oem unlock_accept command must be input within 5 seconds after oem unlock command)
fastboot lock #lock the devices
You must unlock the device first and then write images.
fastboot flash <partition_name> <file_name>
(For example, fastboot flash system system.img)
(Note: the partition name for parameter/loader is "parameter"/"loader")
fastboot oem recovery #reboot to recovery
fastboot oem recovery:wipe_data #reboot to factory reset
fastboot reboot #just reboot
fastboot reboot-bootloader #reboot to rockusb mode
fastboot continue #normal boot