v3 USB-IMPLEMENTATION-PLAN supersedes v2 (archived). Comprehensive
audit-driven roadmap with 9 phases (P1–P9) to make USB a first-class
citizen in Red Bear OS:
P1: Trait unification (all 4 controllers implement UsbHostController)
+ panic hardening (usbscsid 0 panics, xhcid <20 unwraps)
+ remove 3 empty stubs (usbaudiod, acmd, ecmd)
P2: xHCI core — 51-quirk table, HCCPARAMS2 parsing, 36-code error
recovery (babble, transaction error, stall, split)
P3: Hub driver — full enumeration (wHubDelay, power timing, USB 3 SS)
+ interrupt-driven change detection + port LED
P4: Storage — UAS protocol, multi-LUN, SYNCHRONIZE_CACHE, UNMAP, mass-storage
quirks applied at runtime
P5: HID — report descriptor parser, usage→evdev mapping, LED sync, quirks,
multi-touch
P6: Class driver completeness — CDC ACM, CDC NCM, USB Audio, USB-serial
(FTDI/CP210x/PL2303/CH341), compliance test driver
P7: Power management — USB 2.0 LPM, USB 3.0 U1/U2/U3, runtime PM autosuspend
P8: Validation — hardware matrix ≥10 rows + 6 new QEMU scripts
+ error-injection tests
P9: Modern USB scope ADR (host-only; already written in v2 §12)
Linux 7.1 is the implementation of excellence — every feature has a
concrete cross-reference (file:line) and a 'port line-by-line' strategy
when implementation detail is in doubt.
USB-VALIDATION-RUNBOOK v3 replaces v2 (archived): test matrix with
per-phase exit gates, operator runbook for failures.
Stale items cleared:
- v2 active plan archived as USB-IMPLEMENTATION-PLAN-v2-2026-07.md
- v2 active runbook archived as USB-VALIDATION-RUNBOOK-2026-07.md
- archived/README.md supersession table extended
Replace v1 (now archived/USB-IMPLEMENTATION-PLAN-v1-2026-04.md) with a
comprehensive v2 that re-audits every daemon against local/sources/base/
HEAD, aligns with Redox 0.x USB HEAD (Jan-Jul 2026), and reorganizes
phases around bare-metal correctness gaps.
Key v1→v2 corrections:
- xHCI interrupts are *not* restored in production (main.rs:141 hardcodes
Polling). This was the biggest v1 overstatement. P0-A1 now fixes it.
- uhcid/ohcid are 35-line stubs, not "ownership-grade". P0-B2 gives them
real enumeration over usb-core.
- ehcid does not auto-spawn class drivers. P0-B1 adds that.
- The base fork carries only one USB commit. The 88-fix claim lived in
patch carriers that path-sourced recipes don't apply. v2 records this
honestly and recommends per-feature commits on submodule/base.
Also:
- USB-VALIDATION-RUNBOOK.md restored from archived/ (operationally current).
- local/AGENTS.md: operator override allowing agents to create submodules
when really necessary (2026-07-07), with a 4-point necessity test.
- archived/README.md supersession table updated with v1 plan and XHCID plan.
vasilito