/*
 * relay.c - driver for relay11 Test
 *
 * Copyright (C) 2012 Loongson Corporation
 *
 * 2013-5-29
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/miscdevice.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/rcupdate.h>
#include <linux/platform_device.h>
#include <linux/cdev.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/completion.h>
#include <asm/io.h>
#include <linux/fs.h>
#include <linux/fcntl.h>
#include <asm/uaccess.h>
#include <linux/gpio.h>
#include <linux/time.h>

#define GPIORELAY1   47
#define GPIORELAY2	 46
#define GPIORELAY3	 0
#define GPIORELAY4	 1

static int relay_open(struct inode *inode, struct file *file) 
{
	printk(KERN_ALERT"########relay open succesful#############\n");
	gpio_request(GPIORELAY1,"relay1");
	gpio_request(GPIORELAY2,"relay2");
	gpio_request(GPIORELAY3,"relay3");
	gpio_request(GPIORELAY4,"relay4");
//	gpio_direction_input(GPIOECHO);
	gpio_direction_output(GPIORELAY1,1);
	gpio_direction_output(GPIORELAY2,1);
	gpio_direction_output(GPIORELAY3,1);
	gpio_direction_output(GPIORELAY4,1);
	return 0;
}

static int relay_close(struct inode *inode, struct file *file)
{
	gpio_free(GPIORELAY1);
	gpio_free(GPIORELAY2);
	gpio_free(GPIORELAY3);
	gpio_free(GPIORELAY4);
	printk(KERN_ALERT"########relay close succesful###########\n");
	return 0;
}

static ssize_t relay_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
{
/*
	unsigned int count=size;
	if(copy_to_user(buf,(void*)(relay),count));
	{
		return -EFAULT;
	}
*/
	return 0;
}

static ssize_t relay_write(struct file *file, const char __user *buf, size_t count, loff_t *ptr)
{
	return 0;
}

static long relay_ioctl( struct file *file, unsigned int cmd, unsigned long arg)
{
//	printk(KERN_ALERT"in ioctl func!");
	switch(cmd){
		case 0:
//			printk(KERN_ALERT"in ioctl 0!\n");
//			gpio_direction_output(GPIORELAY2,arg);
			break;
		case 1:
			printk(KERN_ALERT"in ioctl 1!\n");
			gpio_direction_output(GPIORELAY1,arg);
			/*
			void __user *p=(void __user *)arg;
			relay();
			copy_to_user(p,send,sizeof(send));
			*/
			break;
		case 2:
			printk(KERN_ALERT"in ioctl 2!\n");
			gpio_direction_output(GPIORELAY2,arg);
			break;
		case 3:
			printk(KERN_ALERT"in ioctl 3!\n");
			gpio_direction_output(GPIORELAY3,arg);
			break;
		case 4:
			printk(KERN_ALERT"in ioctl 4!\n");	
			gpio_direction_output(GPIORELAY4,arg);
			break;
		default:
			printk(KERN_ALERT"in ioctl default!\n");

	}
	return 0;
}

static const struct file_operations relay_ops = {
		.owner = THIS_MODULE,
		.open = relay_open,
		.release = relay_close,
		.read = relay_read,
		.write = relay_write,
		.unlocked_ioctl = relay_ioctl
};

static struct miscdevice relay_miscdev = {
		MISC_DYNAMIC_MINOR,
		"relay",
		&relay_ops,
};

static int __init relay_init(void)
{
	if(misc_register(&relay_miscdev))
	{
	  printk(KERN_ALERT"###############: Couldn't register device 0, %d.\n", 255);
	  return -EBUSY;
	}
	printk(KERN_ALERT"register succesful\n");
	return 0;
}

static void __exit relay_exit(void)
{
	misc_deregister(&relay_miscdev);
}

module_init(relay_init);
module_exit(relay_exit);
MODULE_LICENSE("GPL");