feat(target): add 8BitDo Ultimate 2 Wireless controller emulation#544
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honjow wants to merge 2 commits intoShadowBlip:mainfrom
Open
feat(target): add 8BitDo Ultimate 2 Wireless controller emulation#544honjow wants to merge 2 commits intoShadowBlip:mainfrom
honjow wants to merge 2 commits intoShadowBlip:mainfrom
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Emulates the 8BitDo Ultimate 2 Wireless controller (DInput mode, VID=0x2DC8/PID=0x6012) as a UHID target device. - HID report structure derived from SDL_hidapi_8bitdo.c - Full button mapping including L4/R4/PL/PR back buttons - Gyroscope and accelerometer with coordinate rotation matching SDL - Rumble support via OutputEvent::Rumble routed through evdev FF - Add generic OutputEvent::Rumble variant and process_rumble handler in evdev gamepad source for direct magnitude-based rumble control
Allow the current session user to read/write the UHID hidraw node (VID=0x2DC8, PID=0x6012) so Steam can use the emulated device.
pastaq
reviewed
Mar 6, 2026
| OutputEvent::DualSense(report) => report.use_rumble_not_haptics, | ||
| OutputEvent::SteamDeckHaptics(_) => true, | ||
| OutputEvent::SteamDeckRumble(_) => true, | ||
| OutputEvent::Rumble { .. } => true, |
Contributor
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I'm not familiar with this syntax, what does { .. } do?
pastaq
reviewed
Mar 6, 2026
| DualSense(SetStatePackedOutputData), | ||
| SteamDeckHaptics(PackedHapticReport), | ||
| SteamDeckRumble(PackedRumbleReport), | ||
| Rumble { |
Contributor
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Is there a reason UinputOutputEvent wasn't usable here?
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Adds a
8bitdo-u2target device that emulates the 8BitDo Ultimate 2 Wireless in DInput mode (VID=0x2DC8, PID=0x6012) via UHID.Steam uses SDL_hidapi_8bitdo.c to identify and parse this device by VID/PID, reading the 34-byte input report at fixed offsets. The HID report structure and IMU coordinate mapping are derived from that source.
Supported features:
To support rumble routing, this also adds
OutputEvent::Rumbleand aprocess_rumblehandler in the evdev gamepad source that keeps a single persistentFF_RUMBLEeffect alive and updates its magnitude in-place.A udev rule is included to grant hidraw access so Steam can open the virtual device without root.
Tested on MSI Claw 8 and GPD Win5 .