Motion evdev

These instruction are made with a Nintendo Pro controller and Joy-Cons. While the overall process will be the same the motion axis may not match those found on a Sony DualShock 4.

• Recent dolphin version (do not use 5.0 stable!)
• HID Nintendo kernel driver (dkms https://github.com/nicman23/dkms-hid-nintendo)
• Switch pro or Joy-Con.

The HID Nintendo kernel driver exposes 2 evdev devices, one for the buttons and another (IMU) for the accelerators/gyroscopes. Do note that Joy-Cons will have 2 devices each (4 in total).

The IMU input device does not automatically get tagged with `uaccess` while the "regular" device is. If you do not see an IMU device listed in Dolphin's devicelist add the following udev rule to /etc/udev/rules.f/99-hidnintendo.rules. reload udev rules with "udevadm control --reload-rules" and reconnect the device(s).

KERNEL!="event*", GOTO="imuend"

ATTRS{id/vendor}=="057e", ATTRS{id/product}=="2009", ATTRS{name}=="*IMU*", TAG+="uaccess"
ATTRS{id/vendor}=="057e", ATTRS{id/product}=="2006", ATTRS{name}=="*IMU*", TAG+="uaccess"
ATTRS{id/vendor}=="057e", ATTRS{id/product}=="2007", ATTRS{name}=="*IMU*", TAG+="uaccess"
ATTRS{id/vendor}=="057e", ATTRS{id/product}=="200e", ATTRS{name}=="*IMU*", TAG+="uaccess"
ATTRS{id/vendor}=="057e", ATTRS{id/product}=="2017", ATTRS{name}=="*IMU*", TAG+="uaccess"

LABEL="imuend"

It took me a bit of time figuring out which axis corresponds with the right motion control in dolphin. These axis might change in the future when evdev standardizes them.

Dolphin motion	Evdev axis HID Nintendo
Accel Up	Accel Z+
Accel Down	Accel Z-
Accel Left	Accel Y+
Accel Right	Accel Y-
Accel Forward	Accel X+
Accel Backward	Accel X-
Pitch Up	Gyro Y-
Pitch Down	Gyro Y+
Roll Left	Gyro X-
Roll Right	Gyro X+
Yaw Left	Gyro Z+
Yaw Right	Gyro Z-

As the default buttons are all wrong reset all buttons in the Wii Remote configuration. To configure the motion controls you have to use the advanced config window. Right click on each motion button in the Wii Remote configure window. Select the appropriate IMU device at the top in the device selection.

Select the corresponding Accel or Gyro axis, select it and click ok. For example for "Accel Up" in dolphin you need to select "Accel Z+". The end result should look like below.

Repeat this for every motion.