Introduction

The ELAN keyboard interface is used by many OEMs, both in i2c mode and in USB mode — although only updating over USB is supported by this plugin at this time. The microcontroller used is the EM85F684A which is loaded with an ELAN-specific bootloader.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a packed binary file format. This is split, with 0x2000 bytes for the bootloader, and 0x6000 for the application runtime code.

This plugin supports the following protocol ID:

• com.elan.kbd

GUID Generation

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

• USB\VID_1018&PID_1006

Update Behavior

The device flash is updated from a 0x2000 offset. The plugin will disconnect the device into a bootloader mode to perform the update.

Vendor ID Security

The vendor ID is set from the runtime USB vendor, in this instance set to USB:0x1018

External Interface Access

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

Version Considerations

This plugin has been available since fwupd version 2.0.5.

Owners

Anyone can submit a pull request to modify this plugin, but the following people should be consulted before making major or functional changes:

• Richard Hughes: hughsie