LXR coreboot/src/superio/fintek/f81865f/f81865f_early

   1/*
   2 * This file is part of the coreboot project.
   3 *
   4 * Copyright (C) 2011 Advanced Micro Devices, Inc.
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19 */
  20
  21/* Pre-RAM driver for the Fintek F81865F/FG Super I/O chip. */
  22
  23#include <arch/romcc_io.h>
  24#include "f81865f.h"
  25
  26static void pnp_enter_conf_state(device_t dev)
  27{
  28        u16 port = dev >> 8;
  29        outb(0x87, port);
  30        outb(0x87, port);
  31}
  32
  33static void pnp_exit_conf_state(device_t dev)
  34{
  35        u16 port = dev >> 8;
  36        outb(0xaa, port);
  37}
  38
  39static void f81865f_enable_serial(device_t dev, u16 iobase)
  40{
  41        pnp_enter_conf_state(dev);
  42        pnp_set_logical_device(dev);
  43        pnp_set_enable(dev, 0);
  44        pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
  45        pnp_set_enable(dev, 1);
  46        pnp_exit_conf_state(dev);
  47}
  48