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fastboot

command line tool used to directly flash the filesystem in Android devices from a host via USB.

It allows flashing of unsigned partition images. It is disabled in production devices since USB support has been disabled in the bootloader. You must have an Engineering SPL, or an SPL that is S-OFF.

http://source.android.com/source/building.html

http://source.android.com/source/building-devices.html

例

$ adb reboot bootloader
$ fastboot -w
$ fastboot flash system $ANDROID_ROOT/out/target/product/maguro/system.img
$ fastboot flash boot $ANDROID_ROOT/out/target/product/maguro/boot.img
$ fastboot reboot

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ドライバ

Android SDKのextras\google\usb_driver\android_winusb.inf

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Android/アンロック

fastboot flashing unlock
On Nexus One?, Nexus S, Nexus S 4G?, Xoom?, Galaxy Nexus, and Nexus 7, the bootloader is locked by default. With the device in fastboot mode, the bootloader is unlocked with
```
$ fastboot oem unlock
$ fastboot oem lock
```

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デバイスへの転送

http://source.android.com/source/building-devices.html

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機種別

During a cold boot, the following key combinations can be used to boot into fastboot mode, which is a mode in the bootloader that can be used to flash the devices:

Device	Keys
grouper (Nexus 7)	Press Power for a second, and press Volume Down when the bootloader logo appears
maguro (Galaxy Nexus)	Press and hold both Volume Up and Volume Down, then press and hold Power
toro (Galaxy Nexus)	Press and hold both Volume Up and Volume Down, then press and hold Power
panda (PandaBoard)	Press and hold Input, then press Power
wingray (Motorola Xoom)	Press and hold Volume Down, then press and hold Power
crespo (Nexus S)	Press and hold Volume Up, then press and hold Power
crespo4g? (Nexus S 4G?)	Press and hold Volume Up, then press and hold Power
passion? (Nexus One?)	Press and hold the trackball, then press Power
sapphire? (HTC Magic?)	Press and hold Back, then press Power
dream? (HTC Dream?)	Press and hold Back, then press Power

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コマンド

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help

usage: fastboot [ <option> ] <command>

commands:
  update <filename>                        reflash device from update.zip
  flashall                                 flash boot + recovery + system
  flash <partition> [ <filename> ]         write a file to a flash partition
  erase <partition>                        erase a flash partition
  format <partition>                       format a flash partition
  getvar <variable>                        display a bootloader variable
  boot <kernel> [ <ramdisk> ]              download and boot kernel
  flash:raw boot <kernel> [ <ramdisk> ]    create bootimage and flash it
  devices                                  list all connected devices
  continue                                 continue with autoboot
  reboot                                   reboot device normally
  reboot-bootloader                        reboot device into bootloader
  help                                     show this help message

options:
  -w                                       erase userdata and cache
  -s <serial number>                       specify device serial number
  -p <product>                             specify product name
  -c <cmdline>                             override kernel commandline
  -i <vendor id>                           specify a custom USB vendor id
  -b <base_addr>                           specify a custom kernel base address
  -n <page size>                           specify the nand page size. default:2048

fastboot help
usage: fastboot [ <option> ] <command>

commands:
  update <filename>                        Reflash device from update.zip.
  flashall                                 Flash boot, system, vendor, and --
                                           if found -- recovery.
  flash <partition> [ <filename> ]         Write a file to a flash partition.
  flashing lock                            Locks the device. Prevents flashing.
  flashing unlock                          Unlocks the device. Allows flashing
                                           any partition except
                                           bootloader-related partitions.
  flashing lock_critical                   Prevents flashing bootloader-related
                                           partitions.
  flashing unlock_critical                 Enables flashing bootloader-related
                                           partitions.
  flashing get_unlock_ability              Queries bootloader to see if the
                                           device is unlocked.
  flashing get_unlock_bootloader_nonce     Queries the bootloader to get the
                                           unlock nonce.
  flashing unlock_bootloader <request>     Issue unlock bootloader using request.
  flashing lock_bootloader                 Locks the bootloader to prevent
                                           bootloader version rollback.
  erase <partition>                        Erase a flash partition.
  format[:[<fs type>][:[<size>]] <partition>
                                           Format a flash partition. Can
                                           override the fs type and/or size
                                           the bootloader reports.
  getvar <variable>                        Display a bootloader variable.
  set_active <suffix>                      Sets the active slot. If slots are
                                           not supported, this does nothing.
  boot <kernel> [ <ramdisk> [ <second> ] ] Download and boot kernel.
  flash:raw boot <kernel> [ <ramdisk> [ <second> ] ]
                                           Create bootimage and flash it.
  devices [-l]                             List all connected devices [with
                                           device paths].
  continue                                 Continue with autoboot.
  reboot [bootloader]                      Reboot device [into bootloader].
  reboot-bootloader                        Reboot device into bootloader.
  help                                     Show this help message.

options:
  -w                                       Erase userdata and cache (and format
                                           if supported by partition type).
  -u                                       Do not erase partition before
                                           formatting.
  -s <specific device>                     Specify a device. For USB, provide either
                                           a serial number or path to device port.
                                           For ethernet, provide an address in the                                           form <protocol>:<hostname>[:port] where                                           <protocol> is either tcp or udp.
  -p <product>                             Specify product name.
  -c <cmdline>                             Override kernel commandline.
  -i <vendor id>                           Specify a custom USB vendor id.
  -b, --base <base_addr>                   Specify a custom kernel base
                                           address (default: 0x10000000).
  --kernel-offset                          Specify a custom kernel offset.
                                           (default: 0x00008000)
  --ramdisk-offset                         Specify a custom ramdisk offset.
                                           (default: 0x01000000)
  --tags-offset                            Specify a custom tags offset.
                                           (default: 0x00000100)
  -n, --page-size <page size>              Specify the nand page size
                                           (default: 2048).
  -S <size>[K|M|G]                         Automatically sparse files greater
                                           than 'size'. 0 to disable.
  --slot <suffix>                          Specify slot suffix to be used if the
                                           device supports slots. This will be
                                           added to all partition names that use
                                           slots. 'all' can be given to refer
                                           to all slots. 'other' can be given to
                                           refer to a non-current slot. If this
                                           flag is not used, slotted partitions
                                           will default to the current active slot.
  -a, --set-active[=<suffix>]              Sets the active slot. If no suffix is
                                           provided, this will default to the value
                                           given by --slot. If slots are not
                                           supported, this does nothing. This will
                                           run after all non-reboot commands.
  --unbuffered                             Do not buffer input or output.
  --version                                Display version.
  -h, --help                               show this message.

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