Logitech G923 Linux Kernel Driver

This project is intended to add support for the Logitech G923 steering wheel to the Linux kernel.

Latest Updates

G923 PS4 Version

This appears to work similar to the G29 and will require the new-lg4ff module, with the code from this pull request. Automatic mode switching does not currently work and will require the following udev rule in order to work:

ATTR{idVendor}=="046d", ATTR{idProduct}=="c267", RUN+="/usr/sbin/usb_modeswitch -v 046d -p c267 -M 30f8090701010000 -m 03 -r 03"

Usually placed in a file in /etc/udev/rules.d followed by running sudo udevadm control --reload.

Big thanks to @JacKeTUs for figuring this out and to @berarma for maintaining the new-lg4ff module.

G923 XBox Version

The following patch has been recently submitted to the Linux input mailing list: https://patchwork.kernel.org/project/linux-input/list/?series=489571. The compilation error appears to be resolved by replacing g923_hidpp_init with switch_to_hidpp_cmd. I am not able to test this as I do not have the XBox version of the wheel. Discussion of this patch's functionality is more than welcome on this project.

As a result of this patch being publicly available, the patch in this project will be removed.

Useful references

1. https://lekensteyn.nl/files/logitech/logitech_hidpp_2.0_specification_draft_2012-06-04.pdf
2. https://opensource.logitech.com/opensource/images/c/ce/Logitech_Force_Feedback_Protocol_V1.5.pdf
3. https://github.com/cvuchener/hidpp
4. https://www.logitech.com/assets/54557/2/g920-driving-forcetm-racing-wheel.pdf
5. https://usb.org/sites/default/files/hut1_2.pdf
6. https://lekensteyn.nl/files/logitech/logitech_hidpp10_specification_for_Unifying_Receivers.pdf
7. https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf
8. https://who-t.blogspot.com/2018/12/understanding-hid-report-descriptors.html
9. https://www.usb.org/sites/default/files/hid1_11.pdf
10. https://opensource.logitech.com/opensource/images/6/6e/Logitech_Force_Feedback_Protocol_V1.6.pdf

Useful tools

1. https://gitlab.freedesktop.org/libevdev/hid-tools