1 struct file_operations {2         struct module *owner;3         loff_t (*llseek) (struct file *, loff_t, int);4         ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);5         ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);6         ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);7         ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);8         int (*readdir) (struct file *, void *, filldir_t);9         unsigned int (*poll) (struct file *, struct poll_table_struct *);
10         int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
11         long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
12         long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
13         int (*mmap) (struct file *, struct vm_area_struct *);
14         int (*open) (struct inode *, struct file *);
15         int (*flush) (struct file *, fl_owner_t id);
16         int (*release) (struct inode *, struct file *);
17         int (*fsync) (struct file *, struct dentry *, int datasync);
18         int (*aio_fsync) (struct kiocb *, int datasync);
19         int (*fasync) (int, struct file *, int);
20         int (*lock) (struct file *, int, struct file_lock *);
21         ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
22         unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
23          int (*check_flags)(int);
24         int (*flock) (struct file *, int, struct file_lock *);
25         ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
26         ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
27         int (*setlease)(struct file *, long, struct file_lock **);
28 };

 1 static int heatnan_leds_ioctl(2         struct inode *inode,3         struct file *file,4         unsigned int cmd,5         unsigned long arg)6 {7        if(arg<0||arg>3)8        {9            return -EINVAL;
10        }
11        switch(cmd)
12        {
13             case 0:
14             case 1:
15                 {
16                       s3c2410_gpio_setpin(led_table[arg],!cmd);
17                       return 0;
18                 }
19             default:
20                       return -EINVAL;
21
22        }
23  }

 1 #include<linux/kernel.h>
 2 #include<linux/module.h>
 3 #include<linux/miscdevice.h>
 4 #include<linux/gpio.h>
 5 #include<linux/fs.h>
 6 #include<linux/init.h>
 7 #include<mach/regs-gpio.h>
 8 #include<mach/hardware.h>
 9
10 #define DEVICE_NAME "heat_leds"
11
12
13 static unsigned long led_table []= {
14         S3C2410_GPB(5),
15         S3C2410_GPB(6),
16         S3C2410_GPB(7),
17         S3C2410_GPB(8),
18 };
19 static unsigned int led_cfg_table  []={
20         S3C2410_GPIO_OUTPUT,
21         S3C2410_GPIO_OUTPUT,
22         S3C2410_GPIO_OUTPUT,
23         S3C2410_GPIO_OUTPUT,
24 };
25 static int heatnan_leds_ioctl(
26         struct inode *inode,
27         struct file *file,
28         unsigned int cmd,
29         unsigned long arg)
30 {
31        if(arg<0||arg>3)
32        {
33            return -EINVAL;
34        }
35        switch(cmd)
36        {
37             case 0:
38             case 1:
39                 {
40                       s3c2410_gpio_setpin(led_table[arg],!cmd);
41                       return 0;
42                 }
43             default:
44                       return -EINVAL;
45
46        }
47 }
48 static struct file_operations dev_fops={
49         .owner = THIS_MODULE,
50         .ioctl= heatnan_leds_ioctl,
51 };
52 static struct miscdevice misc={
53         .minor=MISC_DYNAMIC_MINOR,
54         .name=DEVICE_NAME,
55         .fops=&dev_fops,
56 };
57 static int __init led_init(void)
58 {
59         int ret;
60         int i;
61         for(i=0;i<4;i++)
62         {
63                 s3c2410_gpio_cfgpin(led_table[i],led_cfg_table[i]);
64                 s3c2410_gpio_cfgpin(led_table[i],0);
65         }
66         ret=misc_register(&misc);
67         printk(DEVICE_NAME"\tinitialized\n");
68         return ret;
69 }
70 static void __exit led_exit(void)
71 {
72         misc_deregister(&misc);
73 }
74 module_init(led_init);
75 module_exit(led_exit);
76 MODULE_LICENSE("GPL");