Same latent bug class as the acmd fix (f505d18a89): both drivers used
the USB endpoint ADDRESS number (ep.address & 0x0F) as the endpoint key,
but xhcid keys endpoints by global enumeration index across all
interfaces of the selected configuration. The two coincide only when
the device's endpoint addresses are sequential in enumeration order —
devices with non-sequential addresses (some modems/audio gear) would
open the wrong endpoint or fail to open.
Both now count endpoints in configuration order per selected
configuration, matching xhcid's PortState::get_endp_desc indexing.
Verified: cargo check -Z build-std --target x86_64-unknown-redox clean
for both crates.
Cross-compile error: from_bits_truncate requires u8 but
O_STAT/O_RDWR are usize. Cast with 'as u8'.
Applied to all 4 scheme wrappers: acmd, ftdi, ecmd, usbaudiod.
redbear-ecmd: scheme loop replaces stdout on Redox
(/scheme/net/usbECM_<N>), notification reader kept for
CDC link state / speed change events on both paths.
redbear-usbaudiod: scheme loop replaces stdout on Redox
(/scheme/audio/usbAudio_<N>), stdin→isoch_OUT playback
thread kept for host stdout path only.
All 4 class drivers now fully wired:
acmd → scheme event loop active on Redox ✅
ftdi → scheme event loop active on Redox ✅
ecmd → scheme event loop active on Redox ✅
usbaudiod → scheme event loop active on Redox ✅
redbear-ecmd: EcmScheme → /scheme/net/usbECM_<N> for netstack
redbear-usbaudiod: AudioScheme → /scheme/audio/usbAudio_<N> for audiod
(supports capture/playback path routing via openat path names)
All 4 class drivers now have scheme service wrappers:
redbear-acmd → /scheme/ttys/usbACM_<N>
redbear-ftdi → /scheme/ttys/usbFTDI_<N>
redbear-ecmd → /scheme/net/usbECM_<N>
redbear-usbaudiod → /scheme/audio/usbAudio_<N>
(HID+Storage already have scheme integration via ProducerHandle/DiskScheme)
Cross-referenced with Linux 7.1 sound/usb/card.c, mixer.c, pcm.c
and include/uapi/linux/usb/audio.h.
Replaces the 32-line scan-and-symlink stub with a 280-line real class driver:
Audio Control Interface (Feature Unit):
- Volume control: GET_CUR / SET_CUR via class-specific control requests
(bmRequestType 0xA1/0x21, FU_VOLUME selector, per-channel)
- Mute control: GET_CUR / SET_CUR (FU_MUTE selector)
- AudioReq helper for bidirectional class-specific control requests
Audio Streaming Interface:
- Isochronous endpoint auto-detection (attributes & 0x03 == 0x01)
- Format heuristics from max packet size (stereo 16-bit 48kHz default)
- SET_CUR SAMPLING_FREQ_CONTROL (0x0100) for sample rate
- Bidirectional isoch I/O: isoch IN → stdout (recording),
stdin → isoch OUT (playback)
Eliminates P1-D last remaining stub — all 3 scan-and-symlink stubs
(ecmd, acmd, usbaudiod) now have real class driver implementations.
Finalize all non-artifact changes accumulated from other sessions:
- config updates, recipe changes, source edits, patches
- pkgar/cache artifacts intentionally excluded (build outputs)
This is the maximum achievable scope for this session.
Hardware-accelerated KDE blocked by: QML gate, KWin/Plasma builds,
hardware GPU validation — all require build system + physical GPU.
Add guard-recipes.sh with four modes:
- --verify: check all local/recipes have correct symlinks into recipes/
- --fix: repair broken symlinks (run before builds)
- --save-all: snapshot all recipe.toml into local/recipes/
- --restore: recreate all symlinks from local/recipes/ (run after sync-upstream)
Wired into apply-patches.sh (post-patch) and sync-upstream.sh (post-sync).
This prevents the build system from deleting recipe files during
cargo cook, make distclean, or upstream source refresh.
vasilito