#ifndef __KERNEL__
#define __KERNEL__
#endif

#ifndef MODULE
#define MODULE
#endif

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/delay.h>

#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#include <asm/ioctl.h>
#include <asm/unistd.h>
#include <asm/io.h>
#include <asm/delay.h>

#include <mach/gpio.h>
#include <mach/map.h>
#include <mach/regs-mem.h>

#include <plat/clock.h>
#include <plat/gpio-cfg.h>
#include <plat/regs-gpio.h>
#include <plat/regs-timer.h>


#include "dev-gpio.h"

static int major = GPIO_MAJOR_DEF;


//------------------------------------------------------------------------------
/** @brief 하드웨어 초기화
@remark 인터럽트 설정은 반드시 초기화 순서를 지켜야 함
*///----------------------------------------------------------------------------
static void hw_gpio_init( void )
{
     /// 출력설정 GPN5
     s3c_gpio_cfgpin (S3C64XX_GPN(5), S3C64XX_GPN_OUTPUT(5));
     s3c_gpio_setpull(S3C64XX_GPN(5), S3C_GPIO_PULL_NONE);
}

//------------------------------------------------------------------------------
/** @brief ioctl 함수
@remark
*///----------------------------------------------------------------------------
static int s3c6410_gpio_ioctl( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg )
{
     switch (cmd)
     {
     case IOCTL_GPIO_ON : gpio_set_value( S3C64XX_GPN(5), 1 ); return 0;
     case IOCTL_GPIO_OFF : gpio_set_value( S3C64XX_GPN(5), 0 ); return 0;
     }
     return -EINVAL;
}

//------------------------------------------------------------------------------
/** @brief 어플리케이션에서 디바이스를 open 하였을때 호출되는 함수
@remark
*///----------------------------------------------------------------------------
static int s3c6410_gpio_open( struct inode *inode, struct file *filp )
{
     return 0;
}

//------------------------------------------------------------------------------
/** @brief 어플리케이션에서 디바이스를 close를 하였을때 호출되는 함수
@remark
*///----------------------------------------------------------------------------
static int s3c6410_gpio_release( struct inode *inode, struct file *filp)
{
     return 0;
}
//------------------------------------------------------------------------------
/** @brief 드라이버에 사용되는 접근 함수에 대한 함수 포인터 구조체를 정의 한다.
이 구조체는 fs.h에 정의 되어 있다.
@remark
*///----------------------------------------------------------------------------
static struct file_operations s3c6410_gpio_fops =
{
     .open = s3c6410_gpio_open,
     .release = s3c6410_gpio_release,
     .ioctl = s3c6410_gpio_ioctl,
};

//------------------------------------------------------------------------------
/** @brief Module Init
@return 0 : Success
-1: Fail
*///----------------------------------------------------------------------------
static __init int s3c6410_gpio_init( void )
{
     /// 장치를 등록한다. ============================================
     major &= 0xff;
     if( !register_chrdev( major, GPIO_DEV_NAME, &s3c6410_gpio_fops ) )
     {
         printk("\nRgister device %s Ok (major=%d)\n", GPIO_DEV_NAME, major );
         printk( "Last Modify %s\n\n", __DATE__);
     }
     else
     {
         printk("\nUnable to get major %d for %s \n", major, GPIO_DEV_NAME );
         return -EBUSY;
     }

     hw_gpio_init();

     return 0;
}

//------------------------------------------------------------------------------
/** @brief Module Exit
*///----------------------------------------------------------------------------
static __exit void s3c6410_gpio_free( void )
{
     /// 장치등록을 해지한다.
     unregister_chrdev( major, GPIO_DEV_NAME );
     printk("\nUnregister %s Ok\n\n", GPIO_DEV_NAME );
}

module_init(s3c6410_gpio_init);
module_exit(s3c6410_gpio_free);

MODULE_AUTHOR("falinux.com");
MODULE_LICENSE("GPL");

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/poll.h>

#include "dev-gpio.h"

#define VERSION_STR "Ver 1.00"

int dev_fd; // 파일핸들

//------------------------------------------------------------------------------
// 설명 : 디바이스 드라이버 열기
// 주의 : 없음
//------------------------------------------------------------------------------
int dev_open( char *fname, unsigned char major, unsigned char minor )
{
     int dev;

     dev = open( fname, O_RDWR|O_NDELAY );
     if (dev == -1 )
     {
         mknod( fname, (S_IRWXU|S_IRWXG|S_IFCHR), (major<<8)|(minor) );

         dev = open( fname, O_RDWR|O_NDELAY );
         if (dev == -1 )
         {
              printf( " Device OPEN FAIL %s\n", fname );
              return -1;
         }
     }

     return dev;
}

//------------------------------------------------------------------------------
// 설명 : main함수를 정의 한다.
// 주의 : 없음
//------------------------------------------------------------------------------
int main( int argc, char **argv )
{
     printf( "\n Program Ver %s %s %s\n", VERSION_STR, __DATE__, __TIME__ );

     dev_fd = dev_open("/dev/gpio", GPIO_MAJOR_DEF, 0 );

     ioctl( dev_fd, IOCTL_GPIO_ON );
     sleep(1);
     ioctl( dev_fd, IOCTL_GPIO_OFF );
     sleep(1);

     close( dev_fd );

    return 0;
}