ddfc72db56
Some logitech devices seem to reboot immediately and the failures then look like a broken pipe, but are actually the device rebooting. If the device really did fail to detach after the timeout is done we'll see a message that the device failed to come back instead. |
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|---|---|---|
| .. | ||
| data | ||
| fu-logitech-hidpp-bootloader-nordic.c | ||
| fu-logitech-hidpp-bootloader-nordic.h | ||
| fu-logitech-hidpp-bootloader-texas.c | ||
| fu-logitech-hidpp-bootloader-texas.h | ||
| fu-logitech-hidpp-bootloader.c | ||
| fu-logitech-hidpp-bootloader.h | ||
| fu-logitech-hidpp-common.c | ||
| fu-logitech-hidpp-common.h | ||
| fu-logitech-hidpp-hidpp-msg.c | ||
| fu-logitech-hidpp-hidpp-msg.h | ||
| fu-logitech-hidpp-hidpp.c | ||
| fu-logitech-hidpp-hidpp.h | ||
| fu-logitech-hidpp-peripheral.c | ||
| fu-logitech-hidpp-peripheral.h | ||
| fu-logitech-hidpp-runtime.c | ||
| fu-logitech-hidpp-runtime.h | ||
| fu-logitech-hidpp-self-test.c | ||
| fu-plugin-logitech-hidpp.c | ||
| logitech-hidpp.quirk | ||
| meson.build | ||
| README.md | ||
Logitech HID 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 information 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.
Firmware Format
The daemon will decompress the cabinet archive and extract a firmware blob in a vendor-specific format that appears to be a subset of the Intel HEX format.
This plugin supports the following protocol IDs:
- com.logitech.unifying
- com.logitech.unifyingsigned
GUID Generation
These devices use the standard USB DeviceInstanceId values when in DFU mode:
USB\VID_046D&PID_AAAA&REV_0001USB\VID_046D&PID_AAAAUSB\VID_046D
When in runtime mode, the HID raw DeviceInstanceId values are used:
HIDRAW\VEN_046D&DEV_C52BHIDRAW\VEN_046D
Vendor ID Security
The vendor ID is set from the vendor ID, in this instance set to USB:0x046D
in bootloader and HIDRAW:0x046D in runtime mode.
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.
[1] https://www.mousejack.com/ [2] https://pwr-Solaar.github.io/Solaar/