Speed table: generic zone-based speed management
- SpeedTable: maps disc positions to optimal speeds - Default: max speed everywhere (drive manages itself) - After read_speed_table(): calibrated per-zone speeds - One u32 comparison per read on hot path - Error recovery: reduce() / resume() override table temporarily - Replaces old tier-based speed management in ContentReader - MT1959 split into mod.rs + variant_a.rs + variant_b.rs - PlatformDriver: init() + read_speed_table() + is_ready()
This commit is contained in:
MattJackson
@@ -0,0 +1,249 @@
|
||||
//! MT1959 platform — shared logic for both variants.
|
||||
|
||||
mod variant_a;
|
||||
mod variant_b;
|
||||
|
||||
use crate::error::{Error, Result};
|
||||
use crate::profile::DriveProfile;
|
||||
use crate::scsi::{self, DataDirection, ScsiTransport};
|
||||
use crate::speed::SpeedTable;
|
||||
use super::PlatformDriver;
|
||||
|
||||
const UNLOCK_RESPONSE_SIZE: u8 = 64;
|
||||
const MODE_A: u8 = 0x01;
|
||||
const MODE_B: u8 = 0x02;
|
||||
const BUFFER_ID_A: u8 = 0x44;
|
||||
const BUFFER_ID_B: u8 = 0x77;
|
||||
const NOMINAL_SPEED_A: [u8; 12] = [0xBB, 0x00, 0x23, 0x28, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00];
|
||||
const NOMINAL_SPEED_B: [u8; 12] = [0x00, 0x00, 0xBB, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00];
|
||||
|
||||
pub struct Mt1959 {
|
||||
pub(crate) profile: DriveProfile,
|
||||
pub(crate) mode: u8,
|
||||
pub(crate) buffer_id: u8,
|
||||
pub(crate) unlocked: bool,
|
||||
speed_table: [u16; 64],
|
||||
disc_sectors: u32,
|
||||
calibrated: bool,
|
||||
calibration_config: [u8; 4],
|
||||
}
|
||||
|
||||
impl Mt1959 {
|
||||
pub fn new(profile: DriveProfile, is_variant_b: bool) -> Self {
|
||||
let (mode, buffer_id) = if is_variant_b {
|
||||
(MODE_B, BUFFER_ID_B)
|
||||
} else {
|
||||
(MODE_A, BUFFER_ID_A)
|
||||
};
|
||||
Mt1959 {
|
||||
profile, mode, buffer_id,
|
||||
unlocked: false,
|
||||
speed_table: [0u16; 64],
|
||||
disc_sectors: 0,
|
||||
calibrated: false,
|
||||
calibration_config: [0u8; 4],
|
||||
}
|
||||
}
|
||||
|
||||
// ── SCSI helpers (shared by both variants) ─────────────────────────
|
||||
|
||||
pub(crate) fn read_buffer_sub(&self, sub_cmd: u8, address: u16, length: u8) -> [u8; 10] {
|
||||
[
|
||||
0x3C, self.mode, self.buffer_id, sub_cmd,
|
||||
(address >> 8) as u8, address as u8,
|
||||
0x00, 0x00, length, 0x00,
|
||||
]
|
||||
}
|
||||
|
||||
pub(crate) fn read_buffer_probe(
|
||||
&self, scsi: &mut dyn ScsiTransport,
|
||||
sub_cmd: u8, address: u16, buf: &mut [u8], expected: usize,
|
||||
) -> Result<usize> {
|
||||
let cdb = self.read_buffer_sub(sub_cmd, address, expected as u8);
|
||||
let result = scsi.execute(&cdb, DataDirection::FromDevice, buf, 5_000)?;
|
||||
if result.bytes_transferred != expected {
|
||||
return Err(Error::ScsiError { opcode: 0x3C, status: 0xFF, sense_key: 0 });
|
||||
}
|
||||
Ok(result.bytes_transferred)
|
||||
}
|
||||
|
||||
pub(crate) fn set_cd_speed_max(&self, scsi: &mut dyn ScsiTransport) -> Result<()> {
|
||||
let cdb = scsi::build_set_cd_speed(0xFFFF);
|
||||
let mut dummy = [0u8; 0];
|
||||
scsi.execute(&cdb, DataDirection::None, &mut dummy, 5_000)?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// ── Unlock (shared) ────────────────────────────────────────────────
|
||||
|
||||
pub(crate) fn do_unlock(&mut self, scsi: &mut dyn ScsiTransport) -> Result<Vec<u8>> {
|
||||
let cdb = [
|
||||
0x3C, self.mode, self.buffer_id,
|
||||
0x00, 0x00, 0x00,
|
||||
0x00, 0x00, UNLOCK_RESPONSE_SIZE, 0x00,
|
||||
];
|
||||
let mut response = vec![0u8; UNLOCK_RESPONSE_SIZE as usize];
|
||||
scsi.execute(&cdb, DataDirection::FromDevice, &mut response, 30_000)?;
|
||||
|
||||
if response.len() >= 4 && response[0..4] != self.profile.signature {
|
||||
return Err(Error::SignatureMismatch {
|
||||
expected: self.profile.signature,
|
||||
got: response[0..4].try_into().unwrap_or([0; 4]),
|
||||
});
|
||||
}
|
||||
|
||||
if response.len() >= 16 && &response[12..16] != b"MMkv" {
|
||||
return Err(Error::UnlockFailed {
|
||||
detail: format!(
|
||||
"mode not active: {:02x}{:02x}{:02x}{:02x}",
|
||||
response[12], response[13], response[14], response[15]
|
||||
),
|
||||
});
|
||||
}
|
||||
|
||||
self.unlocked = true;
|
||||
Ok(response)
|
||||
}
|
||||
|
||||
fn validate(&self, scsi: &mut dyn ScsiTransport) -> Result<()> {
|
||||
for _attempt in 0..5 {
|
||||
let cdb = [
|
||||
0x3C, self.mode, self.buffer_id,
|
||||
0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x04, 0x00,
|
||||
];
|
||||
let mut resp = [0u8; 4];
|
||||
if scsi.execute(&cdb, DataDirection::FromDevice, &mut resp, 5_000).is_ok() {
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
Err(Error::ScsiError { opcode: 0x3C, status: 0xFF, sense_key: 0 })
|
||||
}
|
||||
|
||||
// ── Init (unlock + firmware) ───────────────────────────────────────
|
||||
|
||||
fn run_init(&mut self, scsi: &mut dyn ScsiTransport) -> Result<()> {
|
||||
let mut unlocked = false;
|
||||
for _attempt in 0..6 {
|
||||
match self.do_unlock(scsi) {
|
||||
Ok(_) => { unlocked = true; break; }
|
||||
Err(Error::SignatureMismatch { .. }) => {
|
||||
return Err(Error::UnlockFailed {
|
||||
detail: "signature mismatch — wrong profile for this drive".into(),
|
||||
});
|
||||
}
|
||||
Err(_) => {
|
||||
let ok = if self.mode == MODE_A {
|
||||
variant_a::load_firmware(self, scsi).is_ok()
|
||||
} else {
|
||||
variant_b::load_firmware(self, scsi).is_ok()
|
||||
};
|
||||
if ok { unlocked = true; break; }
|
||||
}
|
||||
}
|
||||
}
|
||||
if !unlocked {
|
||||
return Err(Error::UnlockFailed { detail: "failed after 6 attempts".into() });
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// ── Calibrate (disc surface probes) ────────────────────────────────
|
||||
|
||||
fn run_calibrate(&mut self, scsi: &mut dyn ScsiTransport) -> Result<()> {
|
||||
if !self.unlocked { self.do_unlock(scsi)?; }
|
||||
|
||||
let cap_cdb = [0x25u8, 0, 0, 0, 0, 0, 0, 0, 0, 0];
|
||||
let mut cap_buf = [0u8; 8];
|
||||
if scsi.execute(&cap_cdb, DataDirection::FromDevice, &mut cap_buf, 5_000).is_ok() {
|
||||
self.disc_sectors = u32::from_be_bytes([cap_buf[0], cap_buf[1], cap_buf[2], cap_buf[3]]) + 1;
|
||||
}
|
||||
|
||||
let init_addr: u16 = 0x0100;
|
||||
let mut init_resp = [0u8; 4];
|
||||
let _ = self.read_buffer_probe(scsi, 0x12, init_addr, &mut init_resp, 4);
|
||||
|
||||
self.validate(scsi)?;
|
||||
self.speed_table = [0u16; 64];
|
||||
|
||||
let mut probe_buf = [0u8; 4];
|
||||
let _ = self.read_buffer_probe(scsi, 0x14, 0, &mut probe_buf, 4);
|
||||
let initial_speed = probe_buf[0];
|
||||
self.calibration_config[0] = probe_buf[0];
|
||||
self.calibration_config[1] = probe_buf[1];
|
||||
self.calibration_config[2] = probe_buf[2];
|
||||
|
||||
let mut addr: u16 = 0;
|
||||
let mut prev_speed = initial_speed;
|
||||
while addr < 0x5800 {
|
||||
let mut resp = [0u8; 4];
|
||||
if self.read_buffer_probe(scsi, 0x14, addr, &mut resp, 4).is_err() {
|
||||
self.speed_table = [0u16; 64];
|
||||
self.calibration_config = [0u8; 4];
|
||||
return Err(Error::ScsiError { opcode: 0x3C, status: 0xFF, sense_key: 0 });
|
||||
}
|
||||
if resp[0] != prev_speed { prev_speed = resp[0]; }
|
||||
addr = addr.wrapping_add(0x100);
|
||||
}
|
||||
|
||||
let mut addr: u32 = 0;
|
||||
let mut prev_speed: u8 = 0;
|
||||
while addr < 0x10000 {
|
||||
let mut resp = [0u8; 4];
|
||||
if self.read_buffer_probe(scsi, 0x14, addr as u16, &mut resp, 4).is_err() {
|
||||
break;
|
||||
}
|
||||
let speed = resp[0];
|
||||
if speed > prev_speed && speed > 0 {
|
||||
let idx = ((speed as usize) >> 1).saturating_sub(1);
|
||||
if idx < 64 && self.speed_table[idx] == 0 {
|
||||
self.speed_table[idx] = addr as u16;
|
||||
}
|
||||
}
|
||||
prev_speed = speed;
|
||||
addr += 0x100;
|
||||
}
|
||||
self.calibration_config[3] = prev_speed;
|
||||
|
||||
let _ = self.set_cd_speed_max(scsi);
|
||||
let nominal = if self.mode == MODE_A { &NOMINAL_SPEED_A } else { &NOMINAL_SPEED_B };
|
||||
let mut dummy = [0u8; 0];
|
||||
let _ = scsi.execute(nominal, DataDirection::None, &mut dummy, 5_000);
|
||||
let _ = self.set_cd_speed_max(scsi);
|
||||
|
||||
self.calibrated = true;
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
// ── PlatformDriver trait ───────────────────────────────────────────────
|
||||
|
||||
impl PlatformDriver for Mt1959 {
|
||||
fn init(&mut self, scsi: &mut dyn ScsiTransport) -> Result<()> {
|
||||
if self.unlocked { return Ok(()); }
|
||||
self.run_init(scsi)
|
||||
}
|
||||
|
||||
fn read_speed_table(&mut self, scsi: &mut dyn ScsiTransport, speed_table: &mut SpeedTable) -> Result<()> {
|
||||
if !self.unlocked { self.run_init(scsi)?; }
|
||||
if self.calibrated { return Ok(()); }
|
||||
self.run_calibrate(scsi)?;
|
||||
|
||||
let mut probes: Vec<(u16, u8)> = Vec::new();
|
||||
for i in 0..64 {
|
||||
let addr = self.speed_table[i];
|
||||
if addr == 0 { continue; }
|
||||
let speed_idx = ((i + 1) << 1) as u8;
|
||||
probes.push((addr, speed_idx));
|
||||
}
|
||||
const PROBE_RANGE: u32 = 0x10000;
|
||||
const BD_1X_KBS: u16 = 4500;
|
||||
speed_table.load_calibration(self.disc_sectors, &probes, PROBE_RANGE, BD_1X_KBS);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn is_ready(&self) -> bool {
|
||||
self.unlocked
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user