1 use core::{fmt::Debug, sync::atomic::AtomicU32}; 2 3 use alloc::sync::Arc; 4 use system_error::SystemError; 5 6 use crate::mm::VirtAddr; 7 8 use self::serial8250::serial8250_manager; 9 10 use super::tty::{ 11 termios::{ControlMode, InputMode, LocalMode, OutputMode, Termios, INIT_CONTORL_CHARACTERS}, 12 tty_ldisc::LineDisciplineType, 13 }; 14 15 pub mod serial8250; 16 17 #[allow(dead_code)] 18 pub trait UartDriver: Debug + Send + Sync { 19 /// 获取最大的设备数量 20 fn max_devs_num(&self) -> i32; 21 22 // todo: 获取指向console的指针（在我们系统里面，将来可能是改进后的Textui Window） 23 } 24 25 pub const SERIAL_BAUDRATE: BaudRate = BaudRate::new(115200); 26 27 /// 串口端口应当实现的trait 28 /// 29 /// 参考 https://code.dragonos.org.cn/xref/linux-6.1.9/include/linux/serial_core.h#428 30 #[allow(dead_code)] 31 pub trait UartPort { 32 fn iobase(&self) -> Option<usize> { 33 None 34 } 35 fn membase(&self) -> Option<VirtAddr> { 36 None 37 } 38 fn serial_in(&self, offset: u32) -> u32; 39 fn serial_out(&self, offset: u32, value: u32); 40 fn divisor(&self, baud: BaudRate) -> (u32, DivisorFraction); 41 fn set_divisor(&self, baud: BaudRate) -> Result<(), SystemError>; 42 fn baud_rate(&self) -> Option<BaudRate>; 43 fn startup(&self) -> Result<(), SystemError>; 44 fn shutdown(&self); 45 fn handle_irq(&self) -> Result<(), SystemError>; 46 } 47 48 int_like!(BaudRate, AtomicBaudRate, u32, AtomicU32); 49 int_like!(DivisorFraction, u32); 50 51 lazy_static! { 52 pub static ref TTY_SERIAL_DEFAULT_TERMIOS: Termios = { 53 Termios { 54 input_mode: InputMode::ICRNL | InputMode::IXON | InputMode::IUTF8, 55 output_mode: OutputMode::OPOST | OutputMode::ONLCR, 56 control_mode: ControlMode::B115200 57 | ControlMode::CREAD 58 | ControlMode::HUPCL 59 | ControlMode::CS8, 60 local_mode: LocalMode::ISIG 61 | LocalMode::ICANON 62 | LocalMode::ECHO 63 | LocalMode::ECHOE 64 | LocalMode::ECHOK 65 | LocalMode::ECHOCTL 66 | LocalMode::ECHOKE 67 | LocalMode::IEXTEN, 68 control_characters: INIT_CONTORL_CHARACTERS, 69 line: LineDisciplineType::NTty, 70 input_speed: SERIAL_BAUDRATE.data(), 71 output_speed: SERIAL_BAUDRATE.data(), 72 } 73 }; 74 } 75 76 #[inline(always)] 77 #[allow(dead_code)] 78 pub(super) fn uart_manager() -> &'static UartManager { 79 &UartManager 80 } 81 #[derive(Debug)] 82 pub(super) struct UartManager; 83 84 impl UartManager { 85 pub const NR_TTY_SERIAL_MAX: u32 = 128; 86 /// todo: 把uart设备注册到tty层 87 /// 88 /// 参考 https://code.dragonos.org.cn/xref/linux-6.1.9/drivers/tty/serial/serial_core.c?fi=uart_register_driver#2720 89 #[allow(dead_code)] 90 pub fn register_driver(&self, _driver: &Arc<dyn UartDriver>) -> Result<(), SystemError> { 91 return Ok(()); 92 } 93 } 94 95 pub fn serial_early_init() -> Result<(), SystemError> { 96 serial8250_manager().early_init()?; 97 return Ok(()); 98 } 99 100 pub(super) fn serial_init() -> Result<(), SystemError> { 101 serial8250_manager().init()?; 102 return Ok(()); 103 } 104