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tool: 0.1.3 - add backup ROM flashing

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This commit is contained in:
Jeremy Soller 2020-04-06 16:39:40 -06:00
parent ff639a7836
commit a8b38d6b37
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GPG Key ID: E988B49EE78A7FB1
5 changed files with 86 additions and 44 deletions
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2
tool/Cargo.lock generated
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@ -15,7 +15,7 @@ dependencies = [
[[package]]
name = "system76_ectool"
version = "0.1.2"
version = "0.1.3"
dependencies = [
"redox_hwio 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
]

2
tool/Cargo.toml
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@ -1,6 +1,6 @@
[package]
name = "system76_ectool"
version = "0.1.2"
version = "0.1.3"
edition = "2018"
description = "System76 EC tool"
license = "MIT"

4
tool/src/ec.rs
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@ -231,6 +231,10 @@ impl<'a, T: Timeout> EcSpi<'a, T> {
}
impl<'a, T: Timeout> Spi for EcSpi<'a, T> {
fn target(&self) -> SpiTarget {
self.target
}
/// Disable SPI chip, must be done before and after a transaction
unsafe fn reset(&mut self) -> Result<(), Error> {
let flags = self.flags(false, true);

21
tool/src/main.rs
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@ -93,7 +93,6 @@ unsafe fn flash_read<S: Spi>(spi: &mut SpiRom<S, StdTimeout>, rom: &mut [u8], se
unsafe fn flash_inner(ec: &mut Ec<StdTimeout>, firmware: &Firmware, target: SpiTarget, scratch: bool) -> Result<(), Error> {
let rom_size = 128 * 1024;
let sector_size = 1024;
let mut new_rom = firmware.data.to_vec();
while new_rom.len() < rom_size {
@ -105,6 +104,7 @@ unsafe fn flash_inner(ec: &mut Ec<StdTimeout>, firmware: &Firmware, target: SpiT
&mut spi_bus,
StdTimeout::new(Duration::new(1, 0))
);
let sector_size = spi.sector_size();
let mut rom = vec![0xFF; rom_size];
flash_read(&mut spi, &mut rom, sector_size)?;
@ -168,8 +168,7 @@ unsafe fn flash_inner(ec: &mut Ec<StdTimeout>, firmware: &Firmware, target: SpiT
Ok(())
}
unsafe fn flash(path: &str) -> Result<(), Error> {
let target = SpiTarget::Main;
unsafe fn flash(path: &str, target: SpiTarget) -> Result<(), Error> {
let scratch = true;
//TODO: remove unwraps
@ -300,6 +299,7 @@ unsafe fn fan_set(index: u8, duty: u8) -> Result<(), Error> {
fn usage() {
eprintln!(" console");
eprintln!(" flash [file]");
eprintln!(" flash_backup [file]");
eprintln!(" fan [index] <duty>");
eprintln!(" info");
eprintln!(" print [message]");
@ -352,7 +352,20 @@ fn main() {
},
},
"flash" => match args.next() {
Some(path) => match unsafe { flash(&path) } {
Some(path) => match unsafe { flash(&path, SpiTarget::Main) } {
Ok(()) => (),
Err(err) => {
eprintln!("failed to flash '{}': {:X?}", path, err);
process::exit(1);
},
},
None => {
eprintln!("no file provided");
process::exit(1);
}
},
"flash_backup" => match args.next() {
Some(path) => match unsafe { flash(&path, SpiTarget::Backup) } {
Ok(()) => (),
Err(err) => {
eprintln!("failed to flash '{}': {:X?}", path, err);

99
tool/src/spi.rs
View File

@ -4,11 +4,13 @@ use crate::{
};
pub trait Spi {
fn target(&self) -> SpiTarget;
unsafe fn reset(&mut self) -> Result<(), Error>;
unsafe fn read(&mut self, data: &mut [u8]) -> Result<usize, Error>;
unsafe fn write(&mut self, data: &[u8]) -> Result<usize, Error>;
}
#[derive(Clone, Copy)]
pub enum SpiTarget {
Main,
Backup,
@ -27,6 +29,13 @@ impl<'a, S: Spi, T: Timeout> SpiRom<'a, S, T> {
}
}
pub fn sector_size(&self) -> usize {
match self.spi.target() {
SpiTarget::Main => 1024,
SpiTarget::Backup => 4096,
}
}
pub unsafe fn status(&mut self) -> Result<u8, Error> {
let mut status = [0];
@ -67,30 +76,21 @@ impl<'a, S: Spi, T: Timeout> SpiRom<'a, S, T> {
Ok(())
}
pub unsafe fn erase_chip(&mut self) -> Result<(), Error> {
self.write_enable()?;
self.spi.reset()?;
self.spi.write(&[0x60])?;
// Poll status for busy unset
self.status_wait(1, 0)?;
self.write_disable()?;
Ok(())
}
pub unsafe fn erase_sector(&mut self, address: u32) -> Result<(), Error> {
if (address & 0xFF00_0000) > 0 {
return Err(Error::Parameter);
}
let instruction = match self.spi.target() {
SpiTarget::Main => 0xD7,
SpiTarget::Backup => 0x20,
};
self.write_enable()?;
self.spi.reset()?;
self.spi.write(&[
0xD7,
instruction,
(address >> 16) as u8,
(address >> 8) as u8,
address as u8,
@ -127,30 +127,55 @@ impl<'a, S: Spi, T: Timeout> SpiRom<'a, S, T> {
self.write_enable()?;
for (i, word) in data.chunks(2).enumerate() {
let low = *word.get(0).unwrap_or(&0xFF);
let high = *word.get(1).unwrap_or(&0xFF);
match self.spi.target() {
SpiTarget::Main => for (i, word) in data.chunks(2).enumerate() {
let low = *word.get(0).unwrap_or(&0xFF);
let high = *word.get(1).unwrap_or(&0xFF);
self.spi.reset()?;
if i == 0 {
self.spi.write(&[
0xAD,
(address >> 16) as u8,
(address >> 8) as u8,
address as u8,
low,
high
])?;
} else {
self.spi.write(&[
0xAD,
low,
high
])?;
}
self.spi.reset()?;
if i == 0 {
self.spi.write(&[
0xAD,
(address >> 16) as u8,
(address >> 8) as u8,
address as u8,
low,
high
])?;
} else {
self.spi.write(&[
0xAD,
low,
high
])?;
}
// Poll status for busy unset
self.status_wait(1, 0)?;
// Poll status for busy unset
self.status_wait(1, 0)?;
},
SpiTarget::Backup => for (i, page) in data.chunks(256).enumerate() {
let page_address = address + i as u32 * 256;
if page_address % 256 != 0 {
return Err(Error::Parameter);
}
if i > 0 {
// Write enable clears after each page is written
self.write_enable()?;
}
self.spi.reset()?;
self.spi.write(&[
0xF2,
(page_address >> 16) as u8,
(page_address >> 8) as u8,
page_address as u8,
])?;
self.spi.write(&page)?;
// Poll status for busy unset
self.status_wait(1, 0)?;
},
}
self.write_disable()?;