RedBear-OS

Files

T

vasilito f79954e2bc USB: comprehensive hotplug with Linux 7.1 port event state machine

Cross-referenced with Linux 7.1 drivers/usb/core/hub.c:
- hub_port_debounce() (line 4698): 25ms-step debounce algorithm
  with 100ms stable threshold, 2000ms timeout per USB 2.0 §7.1.7.3
- hub_port_connect_change() (line 5055): connect/disconnect dispatch
- hub_irq() / port_event(): interrupt-driven change detection

PortState enum (replaces ad-hoc bool tracking):
  Disconnected → DebouncingConnect → Connected → Active → Disconnected

Debounce: stable_start timestamp, 4x 25ms checks for 100ms
stable window.  Connection drop during debounce → reset.
Timeout after 2000ms → warn + remove.

Phase-based main loop:
  Phase 1: scan controllers/ports → detect new connections
  Phase 2: debounce + state transitions per port
    - DebouncingConnect: check stability against stable_start
    - Connected: read descriptors → find_driver → spawn
    - Active: check driver exit (try_wait) + disconnect detection
  Phase 3: cleanup (remove disconnected, time out stale debounces)

Driver re-enumeration on crash: Active → Connected transition
on driver exit re-triggers descriptor read + spawn.

read_port_connected() uses XhciClientHandle open success as
connectivity check (lighter than full descriptor read).

2026-07-07 16:04:28 +03:00

Assets/images

Red Bear OS — microkernel OS in Rust, based on Redox

2026-04-12 19:05:00 +01:00

cache

cleanup: remove stale local/cache pkgar and rbos-cache artifacts

2026-06-30 16:00:04 +03:00

config

chore: commit durable overlay state (configs, patches, recipe symlinks)

2026-05-01 03:11:21 +01:00

docs

docs: USB v3 plan + runbook — first-class-citizen roadmap