LXR coreboot/src/mainboard/asus/m2n-e/fanctl.c

   1/*
   2 * This file is part of the coreboot project.
   3 *
   4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
   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/*
  22 * The ASUS M2N-E has 6 different fans, connected to two different chips:
  23 * - ITE IT8716F: fan1 = CPU_FAN, fan2 = CHA_FAN1, fan3 = PWR_FAN1
  24 * - Analog Devices ADT7475: fan1 = CHA_FAN4, fan2 = CHA_FAN2, fan3 = CHA_FAN3
  25 */
  26
  27#include <arch/io.h>
  28#include <stdlib.h>
  29#include <superio/ite/it8716f/it8716f.h>
  30
  31static void write_index(u16 port, u8 reg, u8 value)
  32{
  33        outb(reg, port);
  34        outb(value, port + 1);
  35}
  36
  37static const struct {
  38        u8 index;
  39        u8 value;
  40} sequence[] = {
  41        /* Enable startup of monitoring operations. */
  42        { 0x00, 0x11},
  43        /* Polarity active-high, PWM frequency 23.43KHz, activate fans 1-3. */
  44        { 0x14, 0xd7},
  45        /* Set the correct sensor types. TMPIN1: diode, TMPIN2/3: resistor. */
  46        { 0x51, 0x31},
  47        /* Fan1 (CPU_FAN) is software-controlled. */
  48        { 0x15, 0x7f},
  49        /* Fan2 (CHA_FAN1) is software-controlled. */
  50        { 0x16, 0x7f},
  51        /* Fan3 (PWR_FAN1) is software-controlled. */
  52        { 0x17, 0x7f},
  53        /* Enable fan1/2/3, select "on/off mode" for all of them. */
  54        { 0x13, 0x70},
  55};
  56
  57/* Called from src/ite/it8716f/superio.c. */
  58void init_ec(u16 base)
  59{
  60        int i;
  61
  62        for (i = 0; i < ARRAY_SIZE(sequence); i++)
  63                write_index(base, sequence[i].index, sequence[i].value);
  64}
  65