#include "usb_gpio.h"

static struct gpio_chip ft232_chip;

#include "gpio_callbacks.c"

static void usb_gpio_exit(void) {
	if( gpiochip_remove(&ft232_chip)<0 ){
		printk("<1>%s: Couldn't free GPIO-pins!\n",MOD_NAME);
	}
	printk("<1>%s: Bye!\n",MOD_NAME);
}

static int usb_gpio_init(void) {
	int ret;
	// Prepare user space handler call
	char *argv[] = { "/usr/bin/logger", "help!", NULL };
	static char *envp[] = {
		"HOME=/",
		"TERM=linux",
		"PATH=/sbin:/bin:/usr/sbin:/usr/bin", NULL };

	printk("<1>%s: Loading... \n",MOD_NAME);
	
	ft232_chip.label = MOD_NAME;

	//Callback functions
	ft232_chip.direction_input = set_in;
	ft232_chip.direction_output = set_out;
	ft232_chip.get = get_value;
	ft232_chip.set = set_value;

	//Automaticaly choose GPIO numbers - manual seems not to be possible
	ft232_chip.base = -1; 
	//Number of GPIO pins
	ft232_chip.ngpio = NUM_OF_GPIO;
	 //This indicates that get and set functions can sleep
	ft232_chip.can_sleep = 1;
	ft232_chip.owner = THIS_MODULE;

	ret = gpiochip_add(&ft232_chip);
	DEBUG_OUT("<1>%s: gpiochip_add returned %d\n",MOD_NAME,ret);
	if (ret){
		printk("<1>%s: Can't register chip!\n",MOD_NAME);
	}
	
	//Call the user space handler
	return call_usermodehelper( argv[0], argv, envp, UMH_WAIT_PROC );
}

module_init(usb_gpio_init);
module_exit(usb_gpio_exit);
MODULE_LICENSE("Dual BSD/GPL");