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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 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.
*/
/*
* The ASUS M2N-E has 6 different fans, connected to two different chips:
* - ITE IT8716F: fan1 = CPU_FAN, fan2 = CHA_FAN1, fan3 = PWR_FAN1
* - Analog Devices ADT7475: fan1 = CHA_FAN4, fan2 = CHA_FAN2, fan3 = CHA_FAN3
*/
#include <arch/io.h>
#include <stdlib.h>
#include <superio/ite/it8716f/it8716f.h>
static void write_index(u16 port, u8 reg, u8 value)
{
outb(reg, port);
outb(value, port + 1);
}
static const struct {
u8 index;
u8 value;
} sequence[] = {
/* Enable startup of monitoring operations. */
{ 0x00, 0x11},
/* Polarity active-high, PWM frequency 23.43KHz, activate fans 1-3. */
{ 0x14, 0xd7},
/* Set the correct sensor types. TMPIN1: diode, TMPIN2/3: resistor. */
{ 0x51, 0x31},
/* Fan1 (CPU_FAN) is software-controlled. */
{ 0x15, 0x7f},
/* Fan2 (CHA_FAN1) is software-controlled. */
{ 0x16, 0x7f},
/* Fan3 (PWR_FAN1) is software-controlled. */
{ 0x17, 0x7f},
/* Enable fan1/2/3, select "on/off mode" for all of them. */
{ 0x13, 0x70},
};
/* Called from src/ite/it8716f/superio.c. */
void init_ec(u16 base)
{
int i;
for (i = 0; i < ARRAY_SIZE(sequence); i++)
write_index(base, sequence[i].index, sequence[i].value);
}
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