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ableos/kernel/src/device_tree.rs

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//! A tree of hardware devices
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use {
crate::alloc::string::ToString,
alloc::{string::String, vec::Vec},
core::fmt,
hashbrown::HashMap,
};
/// A device object.
/// TODO define device
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pub type Device = xml::XMLElement;
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/// A tree of devices
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// TODO: alphabetize this list
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#[derive(Debug)]
pub struct DeviceTree {
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/// The device tree
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pub devices: HashMap<String, Vec<Device>>,
}
impl DeviceTree {
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/// Build the device tree. Does not populate the device tree
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pub fn new() -> Self {
let mut dt = Self {
devices: HashMap::new(),
};
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device_tree!(dt, [
"Mice",
"Keyboards",
"Controllers",
"Generic HIDs",
"Disk Drives",
"CD Drives",
"Batteries",
"Monitors",
"GPUs",
"CPUs",
"USB",
"Serial Ports",
"Cameras",
"Biometric Devices",
]);
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dt
}
}
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use crate::{utils::TAB, device_tree};
use crate::tab;
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impl fmt::Display for DeviceTree {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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writeln!(f)?;
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for (device_type, devices) in &self.devices {
writeln!(f, "\r{}{}/\r", tab!(1), device_type)?;
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for device in devices {
writeln!(f, "{}{}/\r", tab!(2), device.name)?;
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for attr in &device.attributes {
writeln!(f, "{}{}\r", tab!(3), attr)?;
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}
for child in &device.children {
writeln!(f, "{}{}\r", tab!(3), child.name)?;
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for attr in &child.attributes {
writeln!(f, "{}{}\r", tab!(4), attr)?;
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}
for child in &child.children {
writeln!(f, "{}{}\r", tab!(4), child.name)?;
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for attr in &child.attributes {
writeln!(f, "{}{}\r", tab!(5), attr)?;
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}
}
}
}
}
Ok(())
}
}