src/superio/smsc/sch4037/sch4037_early_init.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2012 Advanced Micro Devices, Inc.
 *
 * 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; version 2 of the License.
 *
 * 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.
 */


#include <arch/io.h>
#include <device/pnp.h>
#include <stdint.h>

#include "sch4037.h"

static void pnp_enter_conf_state(pnp_devfn_t dev)
{
	unsigned port = dev >> 8;
	outb(0x55, port);
}

static void pnp_exit_conf_state(pnp_devfn_t dev)
{
	unsigned port = dev >> 8;
	outb(0xaa, port);
}

void sch4037_early_init(unsigned port)
{
	pnp_devfn_t dev;

	dev = PNP_DEV(port, SMSCSUPERIO_SP1);
	pnp_enter_conf_state(dev);

	/* Auto power management */
	pnp_write_config(dev, 0x22, 0x38); /* BIT3+BIT4+BIT5 */
	pnp_write_config(dev, 0x23, 0);

	/* Enable SMSC UART 0 */
	dev = PNP_DEV(port, SMSCSUPERIO_SP1);
	pnp_set_logical_device(dev);
	pnp_set_enable(dev, 0);

	pnp_set_iobase(dev, PNP_IDX_IO0, CONFIG_TTYS0_BASE);
	pnp_set_irq(dev, PNP_IDX_IRQ0, 0x4);

	/* Enabled High speed, disabled MIDI support. */
	pnp_write_config(dev, 0xF0, 0x02);
	pnp_set_enable(dev, 1);

	/* Enable keyboard */
	dev = PNP_DEV(port, SCH4037_KBC);
	pnp_set_logical_device(dev);
	pnp_set_enable(dev, 0);
	pnp_set_irq(dev, 0x70, 1);   /* IRQ 1 */
	pnp_set_irq(dev, 0x72, 12);   /* IRQ 12 */
	pnp_set_enable(dev, 1);

	pnp_exit_conf_state(dev);
}