diff options
Diffstat (limited to 'src/mainboard/asus/m2n-e/fanctl.c')
| -rw-r--r-- | src/mainboard/asus/m2n-e/fanctl.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/mainboard/asus/m2n-e/fanctl.c b/src/mainboard/asus/m2n-e/fanctl.c new file mode 100644 index 0000000000..c5eb25e68b --- /dev/null +++ b/src/mainboard/asus/m2n-e/fanctl.c @@ -0,0 +1,64 @@ +/* + * 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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * 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); +} |