linux键盘驱动源码

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/input.h>

static struct input_dev *input_dev;

static int __init keyboard_init(void) {
    input_dev = input_allocate_device();
    if (!input_dev) {
        printk(KERN_ERR "Unable to allocate the input device !!\n");
        return -ENOMEM;
    }

    input_dev->name = "Simple Keyboard";
    input_dev->phys = "input0";
    input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_SYN);
    input_dev->keybit[BIT_WORD(EV_KEY)] = BIT_MASK(KEY_RESERVED) | BIT_MASK(~KEY_RESERVED);

    if (input_register_device(input_dev)) {
        printk(KERN_ERR "Unable to register the input device !!\n");
        input_free_device(input_dev);
        return -EIO;
    }

    printk(KERN_INFO "Input device registered successfully!!\n");
    return 0;
}

static void __exit keyboard_exit(void) {
    input_unregister_device(input_dev);
    printk(KERN_INFO "Input device unregistered successfully!!\n");
}

module_init(keyboard_init);
module_exit(keyboard_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple keyboard driver");