#include "unistd.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"

#include <sys/mman.h>  
#include <sys/types.h>  
#include <ctype.h>  
#include <sys/stat.h>  
#include <fcntl.h>  

#define SDRAM_PHY_Position 0xc0000000
char	io_table_fix01[][4] = {
	"132", 	//GPE4	ok	I2SSDO	R26
	"131", 	//GPE3	ok
	"129", 	//GPE1	ok
	"128",	//GPE0	ok
	"130", 	//GPE2	ok

	"32", 	//GPB0	ok
	"34", 	//GPB2	ok
	"33", 	//GPB1	ok
//	"35",  	//GPB3	ok		LCD_BKL	D28
	
	"236",	//GPH12	ok		R99		
	
	"233",	//GPH9	ok 		R25
	"232",	//GPH8	ok		R28
	"224", //GPH0	ok	TXD0	´®¿Ú¹Ò
	"225", //GPH1	ok			´®¿Ú¹Ò
	"226", 	//GPH2	ok	TXD1		
	"227", 	//GPH3	ok		
	"228", 	//GPH4	ok		R43

	"229", 	//GPH5	ok		R46
	"230", 	//GPH6	ok		R49
	"231", 	//GPH7	RXD3 	R52	ok	

	"142",		//GPE14		I2c	
	"143",		//GPE15
	
	"141",		//GPE13 ok		R61	
	"139",		//GPE11 ok		R64	
	"140",		//GPE12 ok		R67	
	
	"333", 		//GPL13	CAN_CS R70
	
	"198", 		//GPG6	CAN_INT R73 ok	
};
char	io_table_fix02[][4] = {	
	"234", //GPH10	ok	
	"238", //GPH14	ok
	"237", //GPH13 R84	ok	

	"197", //GPG5	ok
	"196", //GPG4	ok
	"195", //GPG3	ok
	"194", //GPG2	ok
	"193", //GPG1	ok
	"192", //GPG0	EINT9	R69 ok

	"167",	//GPF7	ok
	"166", //GPF6	ok
	"165", //GPF5	ok
	"164", //GPF4	ok
	"163", //GPF3	ok
	"162", //GPF2	ok
	"161", //GPF1	ok
	"160", //GPF0	EINT0	R42 ok

	"137", //GPE9		ok
	"138", //GPE10	ok
	"134", //GPE6	ok
	"133", //GPE5	ok
	"135", //GPE7	ok
	"136", //GPE8	SD0_DAT1	R24 ok		SD0_DAT1	×î×ó±ß
};

int	calc_port_num(char port, int num)
{
	int	port_num;
	
	switch(port){
	case 'a':
	case 'A':
		port_num = num;
		break;
	case 'b':
	case 'B':
		port_num = 32 + num;
		break;
	case 'c':
	case 'C':
		port_num = 64 + num;
		break;
	case 'd':
	case 'D':
		port_num = 96 + num;
		break;
	case 'e':
	case 'E':
		port_num = 128 + num;
		break;
	case 'f':
	case 'F':
		port_num = 160 + num;
		break;
	case 'g':
	case 'G':
		port_num = 192 + num;
		break;
	case 'h':
	case 'H':
		port_num = 224 + num;
		break;
	case 'i':
	case 'I':
		port_num = 256 + num;
		break;
	case 'j':
	case 'J':
		port_num = 288 + num;
		break;
	case 'K':
	case 'k':
		port_num = 320 + num;
		break;
	case 'l':
	case 'L':
		port_num = 352 + num;
		break;
	case 'm':
	case 'M':
		port_num = 384 + num;
		break;
	case 'n':
	case 'N':
		port_num = 416 + num;
		break;
	default:
		port_num = 0;
	}
	return port_num;
}

void gpio_out(char port, int num, int val)
{
	int	port_num;
	FILE *p=NULL;
	char str[256];

	port_num = calc_port_num(port, num);
	p = fopen("/sys/class/gpio/export","w");
	fprintf(p,"%d",port_num);
	fclose(p);
	sprintf(str, "/sys/class/gpio/gpio%d/direction", port_num);
	p = fopen(str,"w");
	fprintf(p,"out");
	fclose(p);

	sprintf(str, "/sys/class/gpio/gpio%d/value", port_num);
	p = fopen(str,"w");
	fprintf(p,"%d",val>0 ? 1 : 0);
	fclose(p);
}

int gpio_in(char port, int num)
{
	int	port_num;
	FILE *p=NULL;
	int	val;
	char str[256];

	port_num = calc_port_num(port, num);
	p = fopen("/sys/class/gpio/export","w");
	fprintf(p,"%d",port_num);
	fclose(p);
	sprintf(str, "/sys/class/gpio/gpio%d/direction", port_num);
	p = fopen(str,"w");
	fprintf(p,"in");
	fclose(p);

	sprintf(str, "/sys/class/gpio/gpio%d/value", port_num);
	p = fopen(str,"r");
	fscanf(p, "%d", &val);
	fclose(p);

	return (int)val;
}

int main(int argc, char **argv)
{
	int		i;
    FILE *f;  
	int	val;

	if((argc == 5) && (!strcmp(argv[1], "w")))
	{
		gpio_out(argv[2][0], atoi(argv[3]), atoi(argv[4]));
		printf("gpio port p%s%s: set to %s\n", argv[2], argv[3], argv[4]);
	}
	else if((argc == 4) && (!strcmp(argv[1], "r")))
	{
		val = gpio_in(argv[2][0], atoi(argv[3]));
		printf("gpio port p%s%s: %d\n", argv[2], argv[3], val);
	}
	else
		printf("usage: \n./gpio_test w/r portname portnum [val]\nout - e.g.: ./gpio_test w b 1 1\nin - e.g.:./gpio_test r b 1\n");
	return 0;
}