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fwupd/plugins/cros-ec
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Richard Hughes 40cd18fa97 Allow using a per-device global percentage completion 
It's actually quite hard to build a front-end for fwupd at the moment
as you're never sure when the progress bar is going to zip back to 0%
and start all over again. Some plugins go 0..100% for write, others
go 0..100% for erase, then again for write, then *again* for verify.

By creating a helper object we can easily split up the progress of the
specific task, e.g. write_firmware().

We can encode at the plugin level "the erase takes 50% of the time, the
write takes 40% and the read takes 10%". This means we can have a
progressbar which goes up just once at a consistent speed.
2021-09-13 14:28:15 +01:00
..
data cros-ec: Initial skeleton 2020-05-29 06:55:40 +01:00
cros-ec.quirk cros-ec: Add D501 Baklava device support 2021-03-18 14:29:42 -07:00
fu-cros-ec-common.c trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-cros-ec-common.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-cros-ec-firmware.c trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-cros-ec-firmware.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-cros-ec-usb-device.c Allow using a per-device global percentage completion 2021-09-13 14:28:15 +01:00
fu-cros-ec-usb-device.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-plugin-cros-ec.c trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
meson.build Move the plugin build logic to the plugins themselves 2021-02-18 14:46:20 +00:00
README.md trivial: update markdown for pre-commit style 2021-07-18 14:42:47 -05:00

README.md

Chrome OS EC

Introduction

This plugin provides support for the firmware updates for Chrome OS EC project based devices.

Initially, it supports the USB endpoint updater, but lays the groundwork for future updaters which use other update methods other than the USB endpoint.

This is based on the chromeos ec project's usb_updater2 application.

Information about the USB update protocol is available here.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in the Google fmap file format.

This plugin supports the following protocol ID:

  • com.google.usb.crosec

GUID Generation

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

  • USB\VID_18D1&PID_501A

Update Behavior

The device usually presents in runtime mode, but on detach re-enumerates with the same USB PID in an unlocked mode. On attach the device again re-enumerates back to the runtime locked mode.

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.

Vendor ID Security

The vendor ID is set from the USB vendor, which is set to various different values depending on the model and device mode. The list of USB VIDs used is:

  • USB:0x18D1

External Interface Access

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