WIP: checkpoint Wii native IMU and upstream IR bridge

Pause Wii pointing work with firmware 0.33-wii-trace installed. Preserve the pinned libogc IR pipeline, calibrated native IMU, software BOOTSEL, and standard camera sensitivity trial.

Tracking instability, tracking loss, and ineffective vertical movement remain unresolved. Level-2 camera filtering is not hardware-qualified. Nine targeted regression tests pass; firmware and persistent storage were verified after flashing.

tools/switch2_usb_probe/controller_input.h

@@ -36,30 +36,34 @@ bool probe_controller_input_start(void);
 // True means a Bluetooth pairing-window request was queued. Long holds NEVER
 // clear pairings in this bridge, and this does not inject USB controller input.
 bool probe_controller_input_pairing_task(void);
-// Core 0 native 08 relay: disabled until explicitly enabled after flash-ready
-// startup. Disable clears queued data, repeated enable preserves it. Resets
-// must disable the stream; this never changes Bluetooth bonds or pairing.
-// Only subsequent selected-source packets enter the separate 32-entry FIFO.
-// Overflow drops queued history and retains only the arriving packet.
+#if SWITCH2_BRIDGE_WII_INPUT
+// Main supplies the same validated calibration record advertised to the host.
+void probe_controller_input_set_stick_calibration(const uint8_t calibration[9]);
+// Native feature changes are output barriers, not Bluetooth/IMU resets.
+void probe_controller_input_set_native_features(uint8_t features);
+#endif
+// Core0 native08 output. Disable discards queued/prepared data; repeated enable
+// preserves it. Joy-Con mode relays its bounded FIFO; Wii mode synthesizes from
+// fresh calibrated sensors and the selected IR pointer. No pairing changes.
 void probe_controller_input_set_native_stream(bool enabled);
-// Copy a full opaque 63-byte payload (without report ID), oldest first. Returns
-// its never-reused boot-lifetime serial; 0 leaves report untouched. Latest source
-// or head >=500 ms old discards the FIFO; now_ms is the Pico boot-ms clock.
-// Nondestructive until successful HID submission followed by commit.
+// Copy one63-byte payload without report ID. Returns a boot-unique token, or0
+// without changing output. Nondestructive until successful HID submission and
+// commit. now_ms uses the Pico boot-ms clock; unavailable/stale input is rejected.
 uint32_t probe_controller_input_peek_native_report(uint32_t now_ms, uint8_t report[63]);
 // Remove only the exact current head once. A stale/replaced token cannot pop a
 // new stream's packet. Before flash-ready startup peek/commit return 0/false.
 bool probe_controller_input_commit_native_report(uint32_t serial);
 // Built-in vibration samples only; raw HD-rumble output is not forwarded.
-// A nonzero token means queued, not acknowledged. Result: 0 pending, 1 real
-// source ACK, -1 failed/stale. Reset cancels the request, never stored pairing.
+// A nonzero token means queued, not completed. Result:0 pending,1 completion,
+// -1 failed/stale. Joy-Con completion is its application ACK; Wii completion is
+// actual bounded rumble-driver dispatch (not an HD-waveform fidelity claim).
+// Reset cancels the request, never stored pairing.
 bool probe_controller_input_play_sample(uint8_t sample_id, uint64_t* token);
 int probe_controller_input_sample_result(uint64_t token, uint32_t now_ms);
 void probe_controller_input_cancel_sample(void);
-// Core 0 at 250 Hz; now_ms uses the Pico boot-millisecond clock. Only fresh
-// native 08 buttons/stick and cumulative mouse totals are exposed. Inactive
-// fields are zero except serial; the USB protocol must supply its calibrated
-// stick center rather than forwarding inactive stick bytes.
+// Core0 at250Hz; now_ms uses Pico boot milliseconds. Supplies current mapped
+// controls for diagnostic reports; the native sender owns motion consumption.
+// Inactive controls are zero except serial; USB supplies its calibrated center.
 void probe_controller_input_poll(uint32_t now_ms, probe_controller_input* out);
 
 #ifdef __cplusplus