Carry the rich Steam Controller / Steam Deck inputs end-to-end on the wire —
strictly additive + forward-compatible (unknown kinds/bits drop on old peers).
Core (punktfunk-core):
- input.rs: BTN_PADDLE1..4 + BTN_MISC1 in Moonlight's buttonFlags2<<16 namespace
(so the GameStream paddle path and native grips share one host injector map;
Steam L4/L5/R4/R5 reuse the four Xbox-Elite paddle slots).
- quic.rs: RichInput::TouchpadEx (kind 0x03 — surface 0/1/2, touch+click, signed
coords, pressure; the second trackpad the single Touchpad can't express) and
HidOutput::TrackpadHaptic (kind 0x04 — the SC voice-coil pulse). Round-tripped.
- abi.rs: PUNKTFUNK_GAMEPAD_STEAMDECK=6 / _STEAMCONTROLLER=5, the paddle bits,
RICH_TOUCHPAD_EX / HIDOUT_TRACKPAD_HAPTIC constants. from_hid packs
TrackpadHaptic into the existing which + effect[0..6] — the legacy structs do
NOT grow (guarded by new size_of==20/19 asserts); GamepadPref lockstep +
paddle-bit lockstep asserts extended. include/punktfunk_core.h regenerated.
Host (punktfunk-host):
- steam_proto::from_gamepad maps the wire paddles -> the four Deck grips + QAM;
apply_rich routes TouchpadEx left/right -> the matching pad.
- every DualSense/DS4 manager (Linux + Windows) gained a TouchpadEx arm
(surface 0/2 -> its one touchpad; surface 1 ignored) so the variant compiles
everywhere and a Steam client streaming to a DS host keeps its right pad.
- the xpad BUTTON_MAP finally consumes the GameStream paddle bits
(BTN_TRIGGER_HAPPY5-8) — Sunshine/Moonlight paddle clients were silently
no-op'd before (design §5.6).
- Android feedback: drop TrackpadHaptic (no coils; rumble rides 0xCA).
Validated on-box: the ignored backend test now drives the full wire path —
from_gamepad (BTN_A + the L4 grip) + apply_rich (a left-pad TouchpadEx) reach the
evdev as BTN_A + ABS_HAT0X=-8000. Wire round-trips + paddle/TouchpadEx mapping
unit-tested. Workspace clippy/fmt/test green. Not pushed.
Deferred to M4: the C-ABI PunktfunkRichInputEx + send_rich_input2 (only the
Apple/embedder *send* path needs it; the host decodes TouchpadEx today).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Make the virtual hid-steam device a selectable per-session host gamepad,
end-to-end on Linux: PUNKTFUNK_GAMEPAD=steamdeck now builds a
SteamControllerManager that creates a /dev/uhid 28DE:1205 Deck, enters
gamepad_mode, and feeds the byte-exact Deck report (M1).
- inject/linux/steam_controller.rs: SteamControllerManager / SteamDeckPad,
mirroring dualsense.rs (open/create2, GET/SET_REPORT pump, heartbeat, RAII
destroy). Two Steam-specific quirks beyond the DualSense path:
* gamepad_mode entry — best-effort `lizard_mode=0` via sysfs, plus a b9.6
creation pulse (MODE_ENTER) so steam_do_deck_input_event stops
early-returning, plus an anti-toggle guard (MENU_HOLD_CAP) so a long
in-game Start-hold can't flip gamepad_mode back off.
* UHID_SET_REPORT answered err=0 (DualSense omits it; the kernel stalls
~5s/cmd otherwise); the 0xEB rumble report parsed onto the 0xCA plane.
- core config.rs: GamepadPref::SteamDeck (wire byte 6) + SteamController
(byte 5, reserved — folds to Xbox360 until its backend lands); from_u8 /
from_name / as_str. Forward-compatible (unknown byte -> Auto); the C-ABI
PUNKTFUNK_GAMEPAD_* constants stay M3, so no generated-header drift.
- punktfunk1.rs: PadBackend::SteamDeck variant + select / handle / apply_rich
/ pump / heartbeat arms; pick_gamepad Linux arm.
On-box: an #[ignore]d backend test (backend_binds_and_input_flows) drives the
real SteamDeckPad — it binds hid-steam (gamepad + IMU evdevs), enters gamepad
mode, BTN_A reaches the evdev, and the device tears down on drop. Workspace
clippy/fmt/test green. Not pushed. Next: M3 (protocol/ABI wire) + M4 (client
capture).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler