linux 串口中断处理

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/serial_core.h>

static irqreturn_t serial_irq_handler(int irq, void *dev_id)
{
    struct uart_8250_port *up = dev_id;
    struct tty_struct *tty;

    if (!up->port.open)
        return IRQ_NONE;

    tty = up->port.tty;
    if (tty && tty->driver_data) {
        // 处理接收到的数据
        // ...
    }

    return IRQ_HANDLED;
}

static int __init serial_init(void)
{
    int ret;
    struct uart_8250_port *up;

    // 获取串口设备信息
    up = &some_serial_port;

    // 注册中断处理程序
    ret = request_irq(up->irq, serial_irq_handler, IRQF_SHARED, "serial_irq", up);
    if (ret) {
        printk(KERN_ERR "Failed to register serial IRQ handler
");
        return ret;
    }

    return 0;
}

static void __exit serial_exit(void)
{
    struct uart_8250_port *up;

    // 获取串口设备信息
    up = &some_serial_port;

    // 注销中断处理程序
    free_irq(up->irq, up);
}

module_init(serial_init);
module_exit(serial_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("Serial Port IRQ Handler");