uart.h File Reference

#include <ds/queue.h>
#include <fs/vfs.h>
#include <dev/tty.h>

Go to the source code of this file.

Data Structures
struct	uart
	A serial port. More...

Functions
int	uart_register (int id, struct uart *u)
	Registers a UART, as /dev/ttyS<id>.
void	uart_receive_handler (struct uart *u, size_t size)
	Takes characters a UART received, and gives them to its terminal.
void	uart_transmit_handler (struct uart *u, size_t size)
	Sends characters that the terminal output to its UART.

Function Documentation

uart_receive_handler()

void uart_receive_handler	(	struct uart *	u,
		size_t	size )

Takes characters a UART received, and gives them to its terminal.

The UART's driver calls it from its interrupt handler.

Parameters

u	the UART
size	how many characters to take from it

Definition at line 35 of file uart.c.

References MIN, uart::read_queue, uart::receive, uart::tty, tty_master_write(), UART_BUF, uart_receive_handler(), and waitq_wakeup().

Referenced by pl011_irq(), uart_8250_irq(), and uart_receive_handler().

uart_register()

int uart_register	(	int	id,
		struct uart *	u )

Registers a UART, as /dev/ttyS<id>.

Parameters

id	its number (below 192), or -1 for the first free one
u	the UART

Returns

its number, -EINVAL if id is too big, or -ENOSPC if every number is taken

Definition at line 278 of file uart.c.

References devices, uart::name, printk(), and uart_register().

Referenced by pl011_init(), uart_8250_attach(), and uart_register().

uart_transmit_handler()

void uart_transmit_handler	(	struct uart *	u,
		size_t	size )

Sends characters that the terminal output to its UART.

Parameters

u	the UART
size	how many characters to send, at most

Definition at line 59 of file uart.c.

References MIN, uart::out, uart::transmit, uart_transmit_handler(), waitq_wakeup(), and uart::write_queue.

Referenced by uart_8250_irq(), uart_master_write(), and uart_transmit_handler().