/*
 * gsc3280_buzzer.c - driver for Gpio Test
 *						   
 *
 * 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>

#define BUZZER    21
#define BUZZER_OFF 	 0
#define BUZZER_ON	 1

static int buzzer_open(struct inode *inode, struct file *file) 
{
	gpio_request(BUZZER,"BUZZER");
	gpio_direction_output(BUZZER,1);
	return 0;
}

static int buzzer_close(struct inode *inode, struct file *file)
{
	gpio_free(BUZZER);
	return 0;
}

static ssize_t buzzer_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
{

	return 0;
}

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


static long buzzer_ioctl( struct file *file, unsigned int cmd, unsigned long arg)
{
	switch(cmd){
		case BUZZER_OFF:{
			gpio_set_value(BUZZER, 1);
			}
			break;
		case BUZZER_ON:{
			gpio_set_value(BUZZER, 0);
			}
			break;

		default:
			printk(KERN_ALERT"in ioctl default!\n");

	}

	return 0;
}

static const struct file_operations buzzer_ops = {
		.owner = THIS_MODULE,
		.open = buzzer_open,
		.release = buzzer_close,
		.read = buzzer_read,
		.write = buzzer_write,
		.unlocked_ioctl = buzzer_ioctl
};

static struct miscdevice buzzer_miscdev = {
		MISC_DYNAMIC_MINOR,
		"buzzer",
		&buzzer_ops,
};

static int __init buzzer_init(void)
{

	if (misc_register(&buzzer_miscdev))
	{
	  printk(KERN_ALERT"###############: Couldn't register device 0, %d.\n", 255);
	  return -EBUSY;
	}

	return 0;
}

static void __exit buzzer_exit(void)
{
	misc_deregister(&buzzer_miscdev);
}

module_init(buzzer_init);
module_exit(buzzer_exit);
MODULE_LICENSE("GPL");