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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
*
* 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.
*/
#include <arch/io.h>
#include <device/pnp.h>
#include <stdint.h>
#include "f81216h.h"
#define FINTEK_EXIT_KEY 0xAA
static void pnp_enter_conf_state(pnp_devfn_t dev, u8 f81216h_entry_key)
{
u16 port = dev >> 8;
outb(f81216h_entry_key, port);
outb(f81216h_entry_key, port);
}
static void pnp_exit_conf_state(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(FINTEK_EXIT_KEY, port);
}
/* Bring up early serial debugging output before the RAM is initialized. */
void f81216h_enable_serial(pnp_devfn_t dev, u16 iobase, mode_key k)
{
u8 key;
switch (k) {
case MODE_6767:
key = 0x67;
break;
case MODE_7777:
key = 0x77;
break;
case MODE_8787:
key = 0x87;
break;
case MODE_A0A0:
key = 0xA0;
break;
default:
key = 0x77; /* try the hw default */
break;
}
pnp_enter_conf_state(dev, key);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev);
}
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