Initial commit
This commit is contained in:
Jonas Schievink
commit
20b4b2c18f
9 changed files with 958 additions and 0 deletions
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|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
|
||||
|
||||
[[package]]
|
||||
name = "wyz"
|
||||
version = "0.5.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
|
||||
dependencies = [
|
||||
"tap",
|
||||
]
|
||||
20
Cargo.toml
Normal file
20
Cargo.toml
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
[package]
|
||||
name = "keylightd"
|
||||
version = "1.0.0"
|
||||
edition = "2021"
|
||||
license = "0BSD"
|
||||
description = "Keyboard backlight daemon for Framework laptops"
|
||||
repository = "https://github.com/jonas-schievink/keylightd"
|
||||
categories = ["hardware-support", "command-line-utilities"]
|
||||
|
||||
[dependencies]
|
||||
evdev = "0.12.1"
|
||||
nix = { version = "0.26.2", features = ["user"] }
|
||||
anyhow = "1.0.70"
|
||||
bytemuck = { version = "1.13.1", features = ["derive"] }
|
||||
log = "0.4.17"
|
||||
env_logger = { version = "0.10.0", default-features = false, features = [
|
||||
"auto-color",
|
||||
"humantime",
|
||||
] }
|
||||
argh = "0.1.10"
|
||||
10
LICENSE
Normal file
10
LICENSE
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
Permission to use, copy, modify, and/or distribute this software for
|
||||
any purpose with or without fee is hereby granted.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
|
||||
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
||||
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
56
README.md
Normal file
56
README.md
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
<div align="center">
|
||||
|
||||
# `keylightd`
|
||||
|
||||
### Keyboard backlight daemon for Framework laptops
|
||||
|
||||
</div>
|
||||
|
||||
`keylightd` is a small system daemon for [Framework] laptops that listens to keyboard and touchpad input, and turns on the keyboard backlight while either is being used.
|
||||
|
||||
[Framework]: https://frame.work/
|
||||
|
||||
## Installation
|
||||
|
||||
To install from source, clone the repository and run:
|
||||
|
||||
```shell
|
||||
$ cargo build --release
|
||||
$ sudo cp target/release/keylightd /usr/local/bin
|
||||
```
|
||||
|
||||
`keylightd` has no native dependencies you have to install first (apart from a recent Rust toolchain for building it, of course).
|
||||
It implements communication with the Embedded Controller itself, and talks to the input devices using `evdev` ioctls directly.
|
||||
It also does not have any hard dependencies on a desktop environment or display server.
|
||||
|
||||
If you want to configure `keylightd` as a systemd service that starts on boot, you can use the provided service file:
|
||||
|
||||
```shell
|
||||
$ sudo cp etc/keylightd.service /etc/systemd/system
|
||||
$ sudo systemctl enable --now keylightd
|
||||
```
|
||||
|
||||
## Running
|
||||
|
||||
Note that `keylightd` needs to be run as root, since it accesses the Embedded Controller to control the keyboard backlight.
|
||||
|
||||
`keylightd` takes the following command-line arguments:
|
||||
|
||||
```
|
||||
Usage: keylightd [--brightness <brightness>] [--timeout <timeout>]
|
||||
|
||||
keylightd - automatic keyboard backlight daemon for Framework laptops
|
||||
|
||||
Options:
|
||||
--brightness brightness level when active (0-100) [default=30]
|
||||
--timeout activity timeout in seconds [default=10]
|
||||
--help display usage information
|
||||
```
|
||||
|
||||
If you're using the provided `keylightd.service` file, you can adjust the command line parameters there.
|
||||
|
||||
## Contributing
|
||||
|
||||
This project does not generally accept contributions. It is finished and does what I want of it.
|
||||
|
||||
Minor fixes and readme additions *may* be accepted.
|
||||
9
etc/keylightd.service
Normal file
9
etc/keylightd.service
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
[Unit]
|
||||
Description=Keyboard backlight daemon
|
||||
|
||||
[Service]
|
||||
Type=exec
|
||||
ExecStart=/usr/local/bin/keylightd
|
||||
|
||||
[Install]
|
||||
WantedBy=multi-user.target
|
||||
108
src/command.rs
Normal file
108
src/command.rs
Normal file
|
|
@ -0,0 +1,108 @@
|
|||
use bytemuck::{NoUninit, Pod, Zeroable};
|
||||
|
||||
/// Trait implemented by Embedded Controller commands.
|
||||
pub trait Command: NoUninit {
|
||||
/// The command ID.
|
||||
const CMD: Cmd;
|
||||
|
||||
/// Command version.
|
||||
///
|
||||
/// Some commands come in multiple versions (although none of the ones supported here).
|
||||
const VERSION: u32 = 0;
|
||||
|
||||
/// The associated response type.
|
||||
type Response: Pod;
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
pub enum Cmd {
|
||||
#[allow(unused)] // no longer used by cros-ec
|
||||
ProtoVersion = 0x0000,
|
||||
Hello = 0x0001,
|
||||
GetVersion = 0x0002,
|
||||
// ...
|
||||
GetKeyboardBacklight = 0x0022,
|
||||
SetKeyboardBacklight = 0x0023,
|
||||
}
|
||||
|
||||
//////////////////////////////////
|
||||
// Hello
|
||||
//////////////////////////////////
|
||||
|
||||
#[derive(Clone, Copy, NoUninit)]
|
||||
#[repr(C)]
|
||||
pub struct Hello {
|
||||
pub in_data: u32,
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy, Pod, Zeroable)]
|
||||
#[repr(C)]
|
||||
pub struct HelloResponse {
|
||||
pub out_data: u32,
|
||||
}
|
||||
|
||||
impl Command for Hello {
|
||||
const CMD: Cmd = Cmd::Hello;
|
||||
type Response = HelloResponse;
|
||||
}
|
||||
|
||||
//////////////////////////////////
|
||||
// GetVersion
|
||||
//////////////////////////////////
|
||||
|
||||
#[derive(Clone, Copy, NoUninit)]
|
||||
#[repr(C)]
|
||||
pub struct GetVersion;
|
||||
|
||||
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
|
||||
#[repr(C)]
|
||||
pub struct GetVersionResponse {
|
||||
version_string_ro: [u8; 32],
|
||||
version_string_rw: [u8; 32],
|
||||
reserved: [u8; 32],
|
||||
current_image: u32,
|
||||
}
|
||||
|
||||
impl Command for GetVersion {
|
||||
const CMD: Cmd = Cmd::GetVersion;
|
||||
type Response = GetVersionResponse;
|
||||
}
|
||||
|
||||
//////////////////////////////////
|
||||
// GetKeyboardBacklight
|
||||
//////////////////////////////////
|
||||
|
||||
#[derive(Clone, Copy, NoUninit)]
|
||||
#[repr(C)]
|
||||
pub struct GetKeyboardBacklight;
|
||||
|
||||
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
|
||||
#[repr(C)]
|
||||
pub struct GetKeyboardBacklightResponse {
|
||||
pub percent: u8,
|
||||
pub enabled: u8,
|
||||
}
|
||||
|
||||
impl Command for GetKeyboardBacklight {
|
||||
const CMD: Cmd = Cmd::GetKeyboardBacklight;
|
||||
type Response = GetKeyboardBacklightResponse;
|
||||
}
|
||||
|
||||
//////////////////////////////////
|
||||
// SetKeyboardBacklight
|
||||
//////////////////////////////////
|
||||
|
||||
#[derive(Clone, Copy, NoUninit)]
|
||||
#[repr(C)]
|
||||
pub struct SetKeyboardBacklight {
|
||||
pub percent: u8,
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
|
||||
#[repr(C)]
|
||||
pub struct SetKeyboardBacklightResponse;
|
||||
|
||||
impl Command for SetKeyboardBacklight {
|
||||
const CMD: Cmd = Cmd::SetKeyboardBacklight;
|
||||
type Response = SetKeyboardBacklightResponse;
|
||||
}
|
||||
152
src/ec.rs
Normal file
152
src/ec.rs
Normal file
|
|
@ -0,0 +1,152 @@
|
|||
use std::{
|
||||
fs::File,
|
||||
io,
|
||||
mem::{size_of, size_of_val, MaybeUninit},
|
||||
os::fd::AsRawFd,
|
||||
};
|
||||
|
||||
use nix::{errno::Errno, libc::ioctl, request_code_readwrite};
|
||||
|
||||
use crate::command::{self, Hello};
|
||||
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
enum IoctlVersion {
|
||||
V1,
|
||||
V2,
|
||||
}
|
||||
|
||||
/// A handle to the system's ChromiumOS Embedded Controller.
|
||||
///
|
||||
/// This uses the ioctl interface of `/dev/cros_ec` to issue commands.
|
||||
pub struct EmbeddedController {
|
||||
fd: File,
|
||||
version: IoctlVersion,
|
||||
}
|
||||
|
||||
impl EmbeddedController {
|
||||
pub fn open() -> io::Result<Self> {
|
||||
let mut this = Self {
|
||||
fd: File::options()
|
||||
.read(true)
|
||||
.write(true)
|
||||
.open("/dev/cros_ec")?,
|
||||
version: IoctlVersion::V1,
|
||||
};
|
||||
|
||||
// The framework EC uses ioctl interface version 2, but this mirrors the logic in ectool
|
||||
// just to make sure it doesn't do something nonsensical on non-Framework machines.
|
||||
this.version = match this.cmd_v1(Hello {
|
||||
in_data: 0xa0b0c0d0,
|
||||
}) {
|
||||
Err(Errno::ENOTTY) => IoctlVersion::V2,
|
||||
_ => IoctlVersion::V1,
|
||||
};
|
||||
|
||||
log::debug!("ioctl version {:?}", this.version);
|
||||
|
||||
// Test communication by issuing a `Hello` command and reading back the result.
|
||||
let magic = 0xaa55dead;
|
||||
let resp = this.command(Hello { in_data: magic })?;
|
||||
let expected = magic + 0x01020304;
|
||||
if resp.out_data != expected {
|
||||
return Err(io::Error::new(
|
||||
io::ErrorKind::InvalidData,
|
||||
format!(
|
||||
"failed to connect to EC: invalid response to hello command (received {:010x}, expected {:010x})",
|
||||
resp.out_data, expected,
|
||||
),
|
||||
));
|
||||
}
|
||||
|
||||
log::info!("connected to embedded controller");
|
||||
|
||||
Ok(this)
|
||||
}
|
||||
|
||||
pub fn command<C: command::Command>(&self, cmd: C) -> io::Result<C::Response> {
|
||||
match self.version {
|
||||
IoctlVersion::V1 => self.cmd_v1(cmd),
|
||||
IoctlVersion::V2 => self.cmd_v2(cmd),
|
||||
}
|
||||
.map_err(Into::into)
|
||||
}
|
||||
|
||||
fn cmd_v1<C: command::Command>(&self, cmd: C) -> nix::Result<C::Response> {
|
||||
let mut resp = MaybeUninit::<C::Response>::uninit();
|
||||
let mut cmd = CommandV1 {
|
||||
version: C::VERSION,
|
||||
command: C::CMD as u32,
|
||||
outdata: bytemuck::bytes_of(&cmd).as_ptr() as *mut _,
|
||||
outsize: size_of_val(&cmd).try_into().unwrap(),
|
||||
indata: resp.as_mut_ptr().cast(),
|
||||
insize: size_of_val(&resp).try_into().unwrap(),
|
||||
result: 0xff,
|
||||
};
|
||||
unsafe {
|
||||
let ret = ioctl(
|
||||
self.fd.as_raw_fd(),
|
||||
request_code_readwrite!(':', 0, size_of::<CommandV1>()),
|
||||
&mut cmd,
|
||||
);
|
||||
Errno::result(ret)?;
|
||||
Ok(resp.assume_init())
|
||||
}
|
||||
}
|
||||
|
||||
fn cmd_v2<C: command::Command>(&self, cmd: C) -> nix::Result<C::Response> {
|
||||
let mut cmd = CommandV2 {
|
||||
header: CommandV2Header {
|
||||
version: C::VERSION,
|
||||
command: C::CMD as u32,
|
||||
outsize: size_of::<C>().try_into().unwrap(),
|
||||
insize: size_of::<C::Response>().try_into().unwrap(),
|
||||
result: 0xff,
|
||||
},
|
||||
data: CommandV2Union { req: cmd },
|
||||
};
|
||||
|
||||
unsafe {
|
||||
let ret = ioctl(
|
||||
self.fd.as_raw_fd(),
|
||||
request_code_readwrite!(0xEC, 0, size_of::<CommandV2Header>()),
|
||||
&mut cmd,
|
||||
);
|
||||
Errno::result(ret)?;
|
||||
Ok(cmd.data.resp)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
struct CommandV1 {
|
||||
version: u32,
|
||||
command: u32,
|
||||
outdata: *mut u8,
|
||||
outsize: u32,
|
||||
indata: *mut u8,
|
||||
insize: u32,
|
||||
result: u32,
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
struct CommandV2<C: command::Command> {
|
||||
header: CommandV2Header,
|
||||
// Request and response are stored in a `union` rather than using an empty trailing array like
|
||||
// the C code does. I believe this is ABI-equivalent, so it shouldn't cause problems.
|
||||
data: CommandV2Union<C>,
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
struct CommandV2Header {
|
||||
version: u32,
|
||||
command: u32,
|
||||
outsize: u32,
|
||||
insize: u32,
|
||||
result: u32,
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
union CommandV2Union<C: command::Command> {
|
||||
req: C,
|
||||
resp: C::Response,
|
||||
}
|
||||
124
src/main.rs
Normal file
124
src/main.rs
Normal file
|
|
@ -0,0 +1,124 @@
|
|||
use std::{
|
||||
io,
|
||||
sync::{Arc, Condvar, Mutex},
|
||||
thread,
|
||||
time::{Duration, Instant},
|
||||
};
|
||||
|
||||
use argh::FromArgs;
|
||||
use command::{GetKeyboardBacklight, SetKeyboardBacklight};
|
||||
use ec::EmbeddedController;
|
||||
|
||||
mod command;
|
||||
mod ec;
|
||||
|
||||
/// keylightd - automatic keyboard backlight daemon for Framework laptops
|
||||
#[derive(FromArgs)]
|
||||
struct Args {
|
||||
/// brightness level when active (0-100) [default=30]
|
||||
#[argh(option, default = "30", from_str_fn(parse_brightness))]
|
||||
brightness: u8,
|
||||
|
||||
/// activity timeout in seconds [default=10]
|
||||
#[argh(option, default = "10")]
|
||||
timeout: u32,
|
||||
}
|
||||
|
||||
fn parse_brightness(s: &str) -> Result<u8, String> {
|
||||
let brightness = s.parse::<u8>().map_err(|e| e.to_string())?;
|
||||
if brightness > 100 {
|
||||
return Err("invalid brightness value {brightness} (valid range: 0-100)".into());
|
||||
}
|
||||
Ok(brightness)
|
||||
}
|
||||
|
||||
fn main() -> anyhow::Result<()> {
|
||||
env_logger::builder()
|
||||
.filter_module(env!("CARGO_PKG_NAME"), log::LevelFilter::Info)
|
||||
.init();
|
||||
|
||||
let args: Args = argh::from_env();
|
||||
|
||||
let ec = EmbeddedController::open()?;
|
||||
let fade_to = |target: u8| -> io::Result<()> {
|
||||
let resp = ec.command(GetKeyboardBacklight)?;
|
||||
let mut cur = if resp.enabled != 0 { resp.percent } else { 0 };
|
||||
while cur != target {
|
||||
if cur > target {
|
||||
cur -= 1;
|
||||
} else {
|
||||
cur += 1;
|
||||
}
|
||||
|
||||
ec.command(SetKeyboardBacklight { percent: cur })?;
|
||||
thread::sleep(Duration::from_millis(3));
|
||||
}
|
||||
Ok(())
|
||||
};
|
||||
|
||||
let act = Arc::new(ActivityState {
|
||||
last_activity: Mutex::new(Instant::now()),
|
||||
condvar: Condvar::new(),
|
||||
});
|
||||
|
||||
for (path, mut device) in evdev::enumerate() {
|
||||
// Filter devices so that only the Framework's builtin touchpad and keyboard are listened
|
||||
// to. Since we don't support hotplug, listening on USB devices wouldn't work reliably.
|
||||
match device.name() {
|
||||
Some("PIXA3854:00 093A:0274 Touchpad" | "AT Translated Set 2 keyboard") => {
|
||||
let act = act.clone();
|
||||
thread::spawn(move || -> io::Result<()> {
|
||||
let name = device.name();
|
||||
let name = name.as_deref().unwrap_or("<unknown>").to_string();
|
||||
log::info!("starting listener on {}: {name}", path.display());
|
||||
loop {
|
||||
if let Err(e) = device.fetch_events() {
|
||||
log::warn!(
|
||||
"error while fetching events for device '{name}': {e}; closing"
|
||||
);
|
||||
return Err(e);
|
||||
}
|
||||
*act.last_activity.lock().unwrap() = Instant::now();
|
||||
act.condvar.notify_one();
|
||||
|
||||
// Delay a bit, to avoid busy looping.
|
||||
thread::sleep(Duration::from_millis(500));
|
||||
}
|
||||
});
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
log::info!("idle timeout: {} seconds", args.timeout);
|
||||
log::info!("brightness level: {}%", args.brightness);
|
||||
|
||||
let mut state = None;
|
||||
loop {
|
||||
let guard = act.last_activity.lock().unwrap();
|
||||
let last = *guard;
|
||||
let (_, result) = act
|
||||
.condvar
|
||||
.wait_timeout_while(guard, Duration::from_secs(args.timeout.into()), |instant| {
|
||||
*instant == last
|
||||
})
|
||||
.unwrap();
|
||||
let new_state = !result.timed_out();
|
||||
if state != Some(new_state) {
|
||||
log::info!("activity state changed: {state:?} -> {new_state}");
|
||||
if new_state {
|
||||
// Fade in
|
||||
fade_to(args.brightness)?;
|
||||
} else {
|
||||
// Fade out
|
||||
fade_to(0)?;
|
||||
}
|
||||
state = Some(new_state);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct ActivityState {
|
||||
last_activity: Mutex<Instant>,
|
||||
condvar: Condvar,
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue