#
#
#include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
include $(INCLUDE_DIR)/package.mkPKG_NAME:=mydrv
PKG_RELEASE:=1define KernelPackage/mydrvSUBMENU:=Other modulesTITLE:=mydrvFILES:=$(PKG_BUILD_DIR)/mydrv.koKCONFIG:=
endefdefine KernelPackage/mydrv/descriptionThis is a mydrv drivers
endefMAKE_OPTS:= \ARCH="$(LINUX_KARCH)" \CROSS_COMPILE="$(TARGET_CROSS)" \SUBDIRS="$(PKG_BUILD_DIR)"define Build/Preparemkdir -p $(PKG_BUILD_DIR)$(CP) ./src/* $(PKG_BUILD_DIR)/
endefdefine Build/Compile$(MAKE) -C "$(LINUX_DIR)" \$(MAKE_OPTS) modules
endef$(eval $(call KernelPackage,mydrv))

/*****************************
*
*   驱动程序模板
*   版本：V1
*   使用方法(末行模式下)：
*   :%s/mydrv/"你的驱动名称"/g
*
*******************************/#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mman.h>
#include <linux/random.h>
#include <linux/init.h>
#include <linux/raw.h>
#include <linux/tty.h>
#include <linux/capability.h>
#include <linux/ptrace.h>
#include <linux/device.h>
#include <linux/highmem.h>
#include <linux/crash_dump.h>
#include <linux/backing-dev.h>
#include <linux/bootmem.h>
#include <linux/splice.h>
#include <linux/pfn.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/aio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/ioctl.h>/****************  基本定义 **********************/
//内核空间缓冲区定义
#if 0#define KB_MAX_SIZE 20#define kbuf[KB_MAX_SIZE];
#endif//加密函数参数内容： _IOW(IOW_CHAR , IOW_NUMn , IOW_TYPE)
//加密函数用于mydrv_ioctl函数中
//使用举例：ioctl(fd , _IOW('L',0x80,long) , 0x1);
//#define NUMn mydrv , if you need!
#define IOW_CHAR 'L'
#define IOW_TYPE  long
#define IOW_NUM1  0x80//初始化函数必要资源定义
//用于初始化函数当中
//device number;dev_t dev_num;
//struct devstruct cdev mydrv_cdev;
//auto "mknode /dev/mydrv c dev_num minor_num"
struct class *mydrv_class = NULL;
struct device *mydrv_device = NULL;/**************** 结构体 file_operations 成员函数 *****************/
//open
static int mydrv_open(struct inode *inode, struct file *file)
{printk("mydrv drive open...\n");return 0;
}//close
static int mydrv_close(struct inode *inode , struct file *file)
{printk("mydrv drive close...\n");return 0;
}//read
static ssize_t mydrv_read(struct file *file, char __user *buffer,size_t len, loff_t *pos)
{int ret_v = 0;printk("mydrv drive read...\n");return ret_v;
}//write
static ssize_t mydrv_write( struct file *file , const char __user *buffer,size_t len , loff_t *offset )
{int ret_v = 0;printk("mydrv drive write...\n");return ret_v;
}//unlocked_ioctl
static int mydrv_ioctl (struct file *filp , unsigned int cmd , unsigned long arg)
{int ret_v = 0;printk("mydrv drive ioctl...\n");switch(cmd){//常规：//cmd值自行进行修改case 0x1:{if(arg == 0x1) //第二条件；{}}break;//带密码保护：//请在"基本定义"进行必要的定义case _IOW(IOW_CHAR,IOW_NUM1,IOW_TYPE):{if(arg == 0x1) //第二条件{}}break;default:break;}return ret_v;
}/***************** 结构体： file_operations ************************/
//struct
static const struct file_operations mydrv_fops = {.owner   = THIS_MODULE,.open     = mydrv_open,.release = mydrv_close, .read    = mydrv_read,.write   = mydrv_write,.unlocked_ioctl  = mydrv_ioctl,
};/*************  functions: init , exit*******************/
//条件值变量，用于指示资源是否正常使用
unsigned char init_flag = 0;
unsigned char add_code_flag = 0;//init
static __init int mydrv_init(void)
{int ret_v = 0;printk("mydrv drive init...\n");//函数alloc_chrdev_region主要参数说明：//参数2： 次设备号//参数3： 创建多少个设备if( ( ret_v = alloc_chrdev_region(&dev_num,0,1,"mydrv") ) < 0 ){goto dev_reg_error;}init_flag = 1; //标示设备创建成功；printk("The drive info of mydrv:\nmajor: %d\nminor: %d\n",MAJOR(dev_num),MINOR(dev_num));cdev_init(&mydrv_cdev,&mydrv_fops);if( (ret_v = cdev_add(&mydrv_cdev,dev_num,1)) != 0 ){goto cdev_add_error;}mydrv_class = class_create(THIS_MODULE,"mydrv");if( IS_ERR(mydrv_class) ){goto class_c_error;}mydrv_device = device_create(mydrv_class,NULL,dev_num,NULL,"mydrv");if( IS_ERR(mydrv_device) ){goto device_c_error;}printk("auto mknod success!\n");//------------   请在此添加您的初始化程序  --------------////如果需要做错误处理，请：goto mydrv_error;  add_code_flag = 1;//----------------------  END  ---------------------------// goto init_success;dev_reg_error:printk("alloc_chrdev_region failed\n");   return ret_v;cdev_add_error:printk("cdev_add failed\n");unregister_chrdev_region(dev_num, 1);init_flag = 0;return ret_v;class_c_error:printk("class_create failed\n");cdev_del(&mydrv_cdev);unregister_chrdev_region(dev_num, 1);init_flag = 0;return PTR_ERR(mydrv_class);device_c_error:printk("device_create failed\n");cdev_del(&mydrv_cdev);unregister_chrdev_region(dev_num, 1);class_destroy(mydrv_class);init_flag = 0;return PTR_ERR(mydrv_device);//------------------ 请在此添加您的错误处理内容 ----------------//
mydrv_error:add_code_flag = 0;return -1;
//--------------------          END         -------------------//init_success:printk("mydrv init success!\n");return 0;
}//exit
static __exit void mydrv_exit(void)
{printk("mydrv drive exit...\n"); if(add_code_flag == 1){   //----------   请在这里释放您的程序占有的资源   ---------//printk("free your resources...\n");                  printk("free finish\n");                      //----------------------     END      -------------------//}                             if(init_flag == 1){//释放初始化使用到的资源;cdev_del(&mydrv_cdev);unregister_chrdev_region(dev_num, 1);device_unregister(mydrv_device);class_destroy(mydrv_class);}
}/**************** module operations**********************/
//module loading
module_init(mydrv_init);
module_exit(mydrv_exit);//some infomation
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("from Jafy");
MODULE_DESCRIPTION("mydrv drive");/*********************  The End ***************************/