Adds impl UsbHostController for XhciAdapter<N>, closing the architectural gap
where UHCI/OHCI/EHCI all implement the trait but xhcid used an ad-hoc scheme.
Design:
- XhciAdapter holds Arc<Xhci<N>> (xhci already uses interior mutability:
Mutex/CHashMap/Atomic for all state, so &mut self trait methods are
satisfied by delegating to &self Arc methods)
- port_status: maps xHCI PortFlags (CCS/PED/OCA/PR/PP) + speed + link state
into usb_core::PortStatus
- port_reset: delegates to existing reset_port(PortId) with usize-to-PortId
conversion (root ports only, route_string=0)
- Transfer methods (control/bulk/interrupt) are stubbed with Unsupported —
xhci handles enumeration internally via attach_device(), and class
drivers communicate through the scheme IPC, not trait methods
- set_address returns true (SET_ADDRESS is sent via control_transfer,
handled internally by attach_device, like UHCI's approach)
main.rs updated to use usb_core::scheme_path() for consistent scheme naming
(replaces hardcoded format!("usb.{}", name)).
usb-core added as path dependency to xhcid (no workspace member needed —
Cargo allows path deps outside the workspace root).
N=0 for P1-A; control/bulk/interrupt transfer trait bridges deferred to
the usb-core unified enumeration loop follow-up.
Red Bear OS
69a8e406c6