linux usb驱动程序开发

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

// USB设备的Vendor ID和Product ID
#define VENDOR_ID 0x1234
#define PRODUCT_ID 0x5678

// USB设备的操作结构体
static struct usb_device_id my_usb_device_table [] = {
    { USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
    {}
};
MODULE_DEVICE_TABLE(usb, my_usb_device_table);

// 设备打开函数
static int my_usb_open(struct inode *inode, struct file *file)
{
    printk(KERN_INFO "USB device opened
");
    return 0;
}

// 设备关闭函数
static int my_usb_release(struct inode *inode, struct file *file)
{
    printk(KERN_INFO "USB device released
");
    return 0;
}

// 文件操作结构体
static const struct file_operations my_usb_fops = {
   .owner = THIS_MODULE,
   .open = my_usb_open,
   .release = my_usb_release,
};

// USB设备驱动结构体
static struct usb_driver my_usb_driver = {
   .name = "my_usb_driver",
   .id_table = my_usb_device_table,
   .probe = my_usb_probe,
   .disconnect = my_usb_disconnect,
};

// USB设备探测函数
static int my_usb_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
    struct usb_device *dev = interface_to_usbdev(interface);
    printk(KERN_INFO "USB device probed
");
    // 注册字符设备
    register_chrdev(240, "my_usb_device", &my_usb_fops);
    return 0;
}

// USB设备断开连接函数
static void my_usb_disconnect(struct usb_interface *interface)
{
    printk(KERN_INFO "USB device disconnected
");
    unregister_chrdev(240, "my_usb_device");
}

module_usb_driver(my_usb_driver);

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