misc设备模版之ov9550

 ov9550_misc.rar   

#include <linux/init.h>
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/io.h>
#include <linux/fs.h>
#include <linux/uaccess.h>

#define MISC_MINOR    212
#define MISC_NAME    "ov9550"

[ov9550.c]
/***ov9550.c*********************[misc start]*********************************/
int ov9550_open(struct inode *i_nod, struct file *filp)
{
    return 0;
}

int ov9550_ioctl(struct inode *i_nod, struct file *filp, unsigned int cmd, unsigned long usr_ov9550_data)
{
    return 0;
}

int ov9550_read( struct file *file, char *buf, size_t count, loff_t *ppos )
{
     printk("function:%s, line: %d\n", __FUNCTION__, __LINE__);

}

struct file_operations ov9550_ops = {
    .open = ov9550_open,
    .ioctl = ov9550_ioctl,
    .read = ov9550_read,
};

struct miscdevice ov9550_dev = {
    .minor = MISC_MINOR,
    .name = MISC_NAME,
    .fops = &ov9550_ops,
};

/********************************[misc end]********************************/







int ov9550_init(void)
{
    unsigned char ret;

    misc_register(&ov9550_dev); //注册！

    printk("ov9550 initialization finished \n");
    return 0;
}

void ov9550_exit(void)
{
    misc_deregister(&ov9550_dev);
    printk("ov9550 module exit\n");
}

module_init(ov9550_init);
module_exit(ov9550_exit);

MODULE_AUTHOR("JK [e-mail]");
MODULE_LICENSE("GPL");

KERNEL_DIR = /route/?

all:
    make -C $(KERNEL_DIR) M=`pwd` modules

clean:
    make -C $(KERNEL_DIR) M=`pwd` modules clean
    rm -f modules.order

obj-m += ov9550.o

super_rtc-objs =ov9550.o