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renesis: detection-only stub; drop unverified vendor command

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This commit is contained in:
Matthew Jackson
2026-07-09 16:36:47 -07:00
parent e0bf264538
commit ca8119a167
1 changed files with 10 additions and 31 deletions
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src/renesis.rs
+10 -31
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@@ -1,16 +1,10 @@
//! renesis — the Renesas-platform unlocker (Pioneer + HL-DT-ST Renesas drives).
//! renesis — Renesas-platform detection (Pioneer + HL-DT-ST Renesas drives).
//!
//! Optical drives split into two controller families: MediaTek (handled by
//! [`crate::ld`], per-drive firmware) and Renesas. This module owns the Renesas
//! side. Detection is a single vendor probe — a Renesas controller serves the
//! READ_BUFFER 0x02/0xF1 identity block (ASCII `SAT` interface marker at
//! `[16..19]`); a MediaTek drive rejects the command with ILLEGAL REQUEST. See
//! [`is_renesas`].
//!
//! renesis provides the drive-FEATURES capability ([`Renesis::unlock_features`])
//! and NOT bus removal (the cert handles the bus). The feature unlock is a no-op
//! for now — it recognizes the drive and reports the match, deferring the bus to
//! the cert stage.
//! [`crate::ld`]) and Renesas. This module identifies the Renesas side via a
//! single vendor identity probe (see [`is_renesas`]) and reports the match so a
//! Renesas drive is named honestly. It does not modify drive state; AACS bus
//! decryption is handled by the host cert.
use crate::scsi::{DataDirection, ScsiTransport};
use crate::{UnlockCtx, UnlockError, Unlocked, Unlocker};
@@ -22,17 +16,6 @@ const RB_F1_LEN: usize = 48;
const RENESAS_MARKER: &[u8] = b"SAT";
const RENESAS_MARKER_OFFSET: usize = 16;
/// Renesas feature-unlock command (RS8xxx+ platforms). A single fixed vendor
/// WRITE BUFFER (opcode `0x3B`, mode `0x02`, buffer id `0x41`): issuing it
/// authenticates the host and enables the drive's extended feature set.
///
/// Platform-invariant — the same command unlocks every supported Renesas
/// firmware; it does not vary per drive or per firmware revision. Sent by
/// [`Renesis::unlock_features`]. (Verify on hardware before relying on it.)
#[allow(dead_code)]
const RENESAS_CHALLENGE_CDB: [u8; 10] =
[0x3B, 0x02, 0x41, 0xA5, 0xAA, 0xAA, 0x00, 0x00, 0x00, 0x00];
/// True if `scsi` is a Renesas-platform drive (Pioneer or HL-DT-ST Renesas).
///
/// Issues the vendor READ_BUFFER 0x02/0xF1 probe: a Renesas controller serves a
@@ -68,12 +51,10 @@ impl Unlocker for Renesis {
"Renesas"
}
/// `if is_renesas() { recognized }`. Renesas is a distinct platform from
/// LibreDrive (MediaTek): it provides DRIVE FEATURES only — it does NOT remove
/// AACS bus encryption (`unlock_bus` is left at the default, so the cert stage
/// handles the bus). The feature unlock itself is not implemented yet (no-op),
/// but the match IS reported (`Ok`, `drive_unlocked: false`) so the drive is
/// recognized as Renesas. A non-Renesas drive → `NotApplicable`.
/// Report whether the drive is a Renesas platform. On a match, returns `Ok`
/// with `drive_unlocked: false` — the drive is recognized but its state is
/// not modified here (AACS bus decryption is handled by the host cert). A
/// non-Renesas drive → `NotApplicable`.
fn unlock_features(
&self,
scsi: &mut dyn ScsiTransport,
@@ -82,12 +63,10 @@ impl Unlocker for Renesis {
if !is_renesas(scsi) {
return Err(UnlockError::NotApplicable);
}
// Recognized Renesas drive (Pioneer / HL-DT-ST Renesas). Feature unlock:
// TODO. `drive_unlocked: false` → bus encryption is left for the cert.
tracing::debug!(
target: "freemkv::disc",
phase = "renesas_recognized",
"Renesas drive recognized; feature unlock TODO, bus deferred to cert"
"Renesas drive recognized; bus handled by cert"
);
Ok(Unlocked {
vid: None,