a785a1c2f6
Over the months the original meaning of ALLOW_OFFLINE and ALLOW_ONLINE have be lost, and there is now a confusing mixture of uses in the source tree. With this commit we make it clear the UPDATABLE flag is used to specify when the device is updatable (e.g. from the desktop live session, or from the systemd offline updates mode, or both) and the NEEDS_REBOOT flag lets us know when the update is actually going to be done. For instance, a UEFI UpdateCapsule can be *scheduled* from either the desktop or from the update mode (but the latter would be a bit weird), but does require a reboot. Some devices might only be updatable outside the live session, for instance a hard drive update or a GPU update -- there's just too much going on with a live session and we want to tightly control what's running during the firmware flash. This also means we don't have to "retry" the update when scheduling an update that really can be scheduled whenever, but just requires a reboot to apply. |
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|---|---|---|
| .. | ||
| data | ||
| fu-plugin-unifying.c | ||
| lu-common.c | ||
| lu-common.h | ||
| lu-context.c | ||
| lu-context.h | ||
| lu-device-bootloader-nordic.c | ||
| lu-device-bootloader-nordic.h | ||
| lu-device-bootloader-texas.c | ||
| lu-device-bootloader-texas.h | ||
| lu-device-bootloader.c | ||
| lu-device-bootloader.h | ||
| lu-device-peripheral.c | ||
| lu-device-peripheral.h | ||
| lu-device-runtime.c | ||
| lu-device-runtime.h | ||
| lu-device.c | ||
| lu-device.h | ||
| lu-hidpp-msg.c | ||
| lu-hidpp-msg.h | ||
| lu-hidpp.h | ||
| lu-self-test.c | ||
| lu-tool.c | ||
| meson.build | ||
| README.md | ||
Unifying Support
Introduction
This plugin can flash the firmware on Logitech Unifying dongles, both the Nordic (U0007) device and the Texas Instruments (U0008) version.
This plugin will not work with the different "Nano" dongle (U0010) as it does not use the Unifying protocol.
Some bootloader protocol infomation was taken from the Mousejack[1] project, specifically logitech-usb-restore.py and unifying.py. Other documentation was supplied by Logitech.
Additional constants were taken from the Solaar[2] project.
Design Notes
When a dongle is detected in bootloader mode we detach the hidraw driver from the kernel and use raw control transfers. This ensures that we don't accidentally corrupt the uploading firmware. For application firmware we use hidraw which means the hardware keeps working while probing, and also allows us to detect paired devices.
Verification
If you do not have Unifying hardware you can emulate writing firmware using:
unifying-tool write file.hex -v --emulate=bootloader-nordic
This can also be used to produce protocol data to the command line to compare against USB dumps. This plugin should interact with the hardware exactly like the Logitech-provided flashing tool, although only a few devices have been tested.
[1] https://www.mousejack.com/ [2] https://pwr.github.io/Solaar/