2024-10-16 12:10:12 +08:00

83 lines
1.9 KiB
Rust

use alloc::{
string::ToString,
sync::{Arc, Weak},
};
use system_error::SystemError;
use unified_init::macros::unified_init;
use crate::{
driver::base::{
class::{class_manager, Class},
device::sys_dev_char_kset,
kobject::KObject,
subsys::SubSysPrivate,
},
filesystem::sysfs::AttributeGroup,
init::initcall::INITCALL_SUBSYS,
};
/// `/sys/class/tty` 的 class 实例
static mut CLASS_TTY_INSTANCE: Option<Arc<TtyClass>> = None;
/// 获取 `/sys/class/tty` 的 class 实例
#[inline(always)]
#[allow(dead_code)]
pub fn sys_class_tty_instance() -> Option<&'static Arc<TtyClass>> {
unsafe { CLASS_TTY_INSTANCE.as_ref() }
}
/// `/sys/class/tty` 类
#[derive(Debug)]
pub struct TtyClass {
subsystem: SubSysPrivate,
}
impl TtyClass {
const NAME: &'static str = "tty";
pub fn new() -> Arc<Self> {
let r = Self {
subsystem: SubSysPrivate::new(Self::NAME.to_string(), None, None, &[]),
};
let r = Arc::new(r);
r.subsystem()
.set_class(Some(Arc::downgrade(&r) as Weak<dyn Class>));
return r;
}
}
impl Class for TtyClass {
fn name(&self) -> &'static str {
return Self::NAME;
}
fn dev_kobj(&self) -> Option<Arc<dyn KObject>> {
Some(sys_dev_char_kset() as Arc<dyn KObject>)
}
fn set_dev_kobj(&self, _kobj: Arc<dyn KObject>) {
unimplemented!("TtyClass::set_dev_kobj");
}
fn subsystem(&self) -> &SubSysPrivate {
return &self.subsystem;
}
fn dev_groups(&self) -> &'static [&'static dyn AttributeGroup] {
return &[];
}
}
/// 初始化帧缓冲区子系统
#[unified_init(INITCALL_SUBSYS)]
pub fn tty_sysfs_init() -> Result<(), SystemError> {
let tty_class = TtyClass::new();
class_manager().class_register(&(tty_class.clone() as Arc<dyn Class>))?;
unsafe {
CLASS_TTY_INSTANCE = Some(tty_class);
}
return Ok(());
}