/*
 * gsc3280_gpioparal.c - driver for Gpio Test
 *						   8bits out, 4bits in
 *
 * Copyright (C) 2012 Loongson Corporation
 *
 * 2013-03-15
 */
#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 <gsc3280/gpio.h>
#include <gsc3280/sysctl.h>
#include <linux/time.h>
#include<linux/ioctl.h>

#define SYSCTL_MOD_CTL0		(volatile unsigned int  *)0xBC04A008
#define SYSCTL_MOD_CTL1		(volatile unsigned int *)0xBC04A00C
#define SYSCTL_IOMUX_CFG0	(volatile unsigned int  *)0xBC04A0B0
#define SYSCTL_IOMUX_CFG1	(volatile unsigned int *)0xBC04A0B4

#define GPIO79	79

#define MEMDEV_IOC_MAGIC	'k'
#define	GPIO79_HI		_IO(MEMDEV_IOC_MAGIC,1)
#define	GPIO79_LO		_IO(MEMDEV_IOC_MAGIC,2)


//gpio初始化
void ant_gpio_init(void)
{
    //GPIO模块使能
    writel(readl(SYSCTL_MOD_CTL0) | (1<<27), SYSCTL_MOD_CTL0);
	gpio_request(GPIO79,	"GPIO79");   
    gpio_direction_output(GPIO79,1);
}

static int ant_open(struct inode *inode, struct file *file) 
{
	printk(KERN_ALERT"GPIO OPEN OK\n");

	return 0;
}

static int ant_close(struct inode *inode, struct file *file)
{
	return 0;
}

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

static long ant_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	//int ret = 0;
	switch(cmd)
	{
		case	GPIO79_HI:
				gpio_set_value(GPIO79,1);
				break;
		case	GPIO79_LO:
				gpio_set_value(GPIO79,0);
				break;
	
		default:
			printk(KERN_ALERT"cmd error!\n");
			return -EINVAL;
	}
	return -1;
}

static const struct file_operations ant_ops = {
		.owner = THIS_MODULE,
		.open = ant_open,
		.release = ant_close,
		.read = ant_read,
		.unlocked_ioctl = ant_ioctl,
};

static struct miscdevice ant_miscdev = {
		.minor = MISC_DYNAMIC_MINOR,
		.name  = "ant_gpio",
		.fops  = &ant_ops,
};

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

	return 0;
}

static void __exit ant_exit(void)
{
	misc_deregister(&ant_miscdev);
}

module_init(ant_init);
module_exit(ant_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Linss");