## Introduction

This plugin is used to update hardware that uses the fastboot protocol.

## Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in ZIP file format. Inside the zip file must be all the firmware images for each partition and a manifest file. The partition images can be in any format, but the manifest must be either an Android `flashfile.xml` format file, or a QFIL `partition_nand.xml` format file.

For both types, all partitions with a defined image found in the zip file will be updated.

This plugin supports the following protocol ID:

- `com.google.fastboot`

## GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

- `USB\VID_18D1&PID_4EE0`

## Update Behavior

A fastboot device usually presents in runtime mode (or with no interface), but if the user puts the device into fastboot mode using a physical button it then enumerates with a USB descriptor. On attach the device reboots to runtime mode which may mean the device “goes away”.

For this reason the `REPLUG_MATCH_GUID` internal device flag is used so that the bootloader and runtime modes are treated as the same device.

## Quirk Use

This plugin uses the following plugin-specific quirk:

### FastbootBlockSize

Block size to use for transfers.

Since: 1.2.2

### FastbootOperationDelay

Time in ms to delay after a read or write operation.

Since: 1.7.4

## Vendor ID Security

The vendor ID is set from the USB vendor, for example `USB:0x18D1`

## External Interface Access

This plugin requires read/write access to `/dev/bus/usb`.

## Version Considerations

This plugin has been available since fwupd version `1.2.2`.