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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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.
*/
#include <arch/io.h>
#include <device/pnp.h>
#include "it8661f.h"
/* Perform MB PnP setup to put the SIO chip at 0x3f0. */
/* Base address 0x3f0: 0x86 0x80 0x55 0x55. */
/* Base address 0x3bd: 0x86 0x80 0x55 0xaa. */
/* Base address 0x370: 0x86 0x80 0xaa 0x55. */
static void pnp_enter_ext_func_mode(pnp_devfn_t dev)
{
int i;
u16 port = dev >> 8;
/* TODO: Don't hardcode Super I/O config port to 0x3f0. */
outb(0x86, IT8661F_ISA_PNP_PORT);
outb(0x80, IT8661F_ISA_PNP_PORT);
outb(0x55, IT8661F_ISA_PNP_PORT);
outb(0x55, IT8661F_ISA_PNP_PORT);
/* Sequentially write the 32 special values. */
for (i = 0; i < 32; i++)
outb(init_values[i], port);
}
static void pnp_exit_ext_func_mode(pnp_devfn_t dev)
{
pnp_write_config(dev, IT8661F_REG_CC, (1 << 1));
}
/*
* The logical devices will only be involved in the ISA PnP sequence if their
* respective enable bits in IT8661F_REG_LDE are set.
*
* TODO: Find out if we actually need this (we use MB PnP mode).
*
* Bits: FDC (0), Com1 (1), Com2 (2), PP (3), IR (4). Bits 5-7 are reserved.
*/
static void it8661f_enable_logical_devices(pnp_devfn_t dev)
{
pnp_enter_ext_func_mode(dev);
pnp_write_config(dev, IT8661F_REG_LDE, 0x1f);
pnp_exit_ext_func_mode(dev);
}
static void it8661f_set_clkin(pnp_devfn_t dev, u8 clkin)
{
pnp_enter_ext_func_mode(dev);
pnp_write_config(dev, IT8661F_REG_SWSUSP, (clkin << 1));
pnp_exit_ext_func_mode(dev);
}
void it8661f_enable_serial(pnp_devfn_t dev, u16 iobase)
{
pnp_enter_ext_func_mode(dev);
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_ext_func_mode(dev);
}
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