e6121ae3c7
Some devices such as the Quectel EG25-G modem need some breathing room between fastboot commands. This quirk allows to specify for such devices a delay which is used after each read or write command. Without this, the Quectel EG25-G modem's fastboot bootloader cannot handle this and crashes.
1.6 KiB
Fastboot
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&REV_0001USB\VID_18D1&PID_4EE0USB\VID_18D1
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.