use alloc::sync::Arc; use system_error::SystemError; use crate::driver::base::device::{bus::Bus, device_manager, Device}; use super::serio_bus; /// 串行设备,实现该trait的设备实例挂载在serio总线上,同时应该实现Device trait /// /// 参考: https://code.dragonos.org.cn/xref/linux-6.1.9/include/linux/serio.h#20 #[allow(dead_code)] pub trait SerioDevice: Device { /// # 函数功能 /// /// Serio设备写入数据 /// /// ## 参数 /// /// - data 写入的数据 /// /// ## 返回值 /// /// 无 fn write(&self, device: &Arc, data: u8) -> Result<(), SystemError>; /// Serio设备连接驱动时调用 fn open(&self, device: &Arc) -> Result<(), SystemError>; /// Serio设备断开驱动时调用 fn close(&self, device: &Arc) -> Result<(), SystemError>; /// Serio设备初始化时调用 fn start(&self, device: &Arc) -> Result<(), SystemError>; /// Serio设备销毁时调用 fn stop(&self, device: &Arc) -> Result<(), SystemError>; } #[inline(always)] pub fn serio_device_manager() -> &'static SerioDeviceManager { &SerioDeviceManager } pub struct SerioDeviceManager; impl SerioDeviceManager { /// # 函数功能 /// 注册Serio设备 /// /// ## 参数 /// - device 待注册的设备 /// /// ## 返回值 /// 无 pub fn register_port(&self, device: Arc) -> Result<(), SystemError> { self.init_port(device) } /// # 函数功能 /// 初始化Serio设备 /// /// ## 参数 /// - device 待初始化的Serio设备 /// /// ## 返回值 /// 无 /// /// todo:https://code.dragonos.org.cn/xref/linux-6.1.9/drivers/input/serio/serio.c#494 pub fn init_port(&self, device: Arc) -> Result<(), SystemError> { device.set_bus(Some(Arc::downgrade(&(serio_bus() as Arc)))); device_manager().add_device(device.clone() as Arc)?; Ok(()) } }