/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2009 University of Heidelberg
 * Written by Mondrian Nuessle <nuessle@uni-heidelberg.de> for University of Heidelberg
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

/* PILOT SuperIO is only based on LPC observation done on factory system. */

#include <arch/romcc_io.h>
#include "pilot.h"

/* pilot uses 0x5A/0xA5 pattern to actiavte deactivate config access */
static inline void pnp_enter_ext_func_mode(device_t dev)
{
	unsigned port = dev>>8;
	outb(0x5A, port);
}

static void pnp_exit_ext_func_mode(device_t dev)
{
	unsigned port = dev>>8;
	outb(0xA5, port);
}

/* serial config is failry standard procedure */
static void pilot_enable_serial(device_t dev, unsigned iobase)
{
	pnp_enter_ext_func_mode(dev);
	pnp_set_logical_device(dev);
	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
	pnp_set_enable(dev, 1);
	pnp_exit_ext_func_mode(dev);
}

static void pilot_disable_serial(device_t dev)
{
	pnp_enter_ext_func_mode(dev);
	pnp_set_logical_device(dev);
	pnp_set_iobase(dev, PNP_IDX_IO0, 0x00);
	pnp_set_enable(dev, 0);
	pnp_exit_ext_func_mode(dev);
}