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fwupd/plugins/system76-launch
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Richard Hughes c4b7f42e43 Only compress one version of the builtin-quirks 
Saving the quirks in the GResource section worked well, but it made the build
system very complicated and also meant the .data section was duplicated in
both `fwupd` and `fwupdtool` -- negating a lot of the hard-fought savings.

Simplify this feature so that we just `cat` all the quirk files together, then
gzip them into a single file. This means that at startup fwupd only needs to
check the mtime of one file, and weirdly it's actually faster to load a smaller
compressed file from disk that it is to load multiple uncompressed files.
2022-09-27 12:44:04 +01:00
..
fu-plugin-system76-launch.c Speed up the daemon startup by ~2% by doing dlsym much less 2021-11-09 12:02:07 +00:00
fu-system76-launch-device.c system76-launch: Wait for device to re-enumerate if unlocked and reset 2022-06-27 06:49:12 +01:00
fu-system76-launch-device.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
meson.build Only compress one version of the builtin-quirks 2022-09-27 12:44:04 +01:00
README.md Add System76 launch_2 2022-06-21 09:58:51 -05:00
system76-launch.quirk Add System76 launch_2 2022-06-21 09:58:51 -05:00

README.md

System76 Launch

Introduction

This plugin is used to detach the System76 Launch device to DFU mode.

To switch to bootloader mode a USB packet must be written, as specified by the System76 EC protocol.

GUID Generation

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

  • USB\VID_3384&PID_0001&REV_0001
  • USB\VID_3384&PID_0005&REV_0001
  • USB\VID_3384&PID_0006&REV_0001

Update Behavior

The device usually presents in runtime mode, but on detach re-enumerates with a different USB VID and PID in DFU mode. The device is then handled by the dfu plugin.

On DFU attach the device again re-enumerates back to the runtime 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, in this instance set to USB:0x3384

External Interface Access

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