1.重要数据结构
- struct file_operaions
- struct inode
- struct file
2.杂设备驱动模板：struct miscdevice
- 注册：int misc_register(struct miscdevice *misc)
- 注销：int misc_deregister(struct miscdevice *misc)
3.早期标准字符设备驱动模板：
- 注册：int register_chrdev(unsigned int major, const char *name, const struct file_operations *fops)
- 注销：void unregister_chrdev(unsigned int major, const char *name)
4.Linux2.6标准字符设备驱动模型
- 核心数据结构：struct cdev
- 注册：int register_chrdev_region(dev_t first, unsigned int count, char *name)
- 注销：void unregister_chrdev_region(dev_t first, unsigned int count)
5.自动创建设备文件
- 核心数据：struct class：设备类对象
- struct class* class_create
- struct device *device
6.ioctl控制接口
- 定义命令：_IO（type, nr), _IOR(type, nr, datatype), _IOW(type, nr, datatype), _IOWR(type, nr, datatype)