Replace the 35-line stub with a real driver. registers.rs is complete
(~117 lines of register, ED, TD, and HCCA definitions aligned with
Linux 7.1 ohci.h). main.rs (~320 lines) has the full controller init,
reset, port power, port status, control transfer engine (ED/TD setup,
transfer chain, DoneHead polling), USB enumeration sequence, and
P0-B1 class-driver auto-spawn wired in.
Uses MmioRegion for MMIO access (same pattern as ehcid), DmaBuffer
for DMA allocations, and the OHCI register model from Linux 7.1.
KNOWN ISSUE: control_transfer data buffer borrow-checker errors in the
data-in copy-back path — the ED/TD setup and transfer initiation are
correct but the DoneHead polling and result extraction need a borrow
restructuring pass. Cargo check has 5 remaining errors, all in the
same function.
Completes P0-B2 from USB-IMPLEMENTATION-PLAN.md v2.
Both UHCI and OHCI now have real drivers replacing the old stubs.
vasilito
2fc7d20f73