| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2005 Tyan |
| * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) |
| * Copyright (C) 2007 Ward Vandewege <ward@gnu.org> |
| * |
| * 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 |
| */ |
| |
| #include <device/device.h> |
| #include <console/console.h> |
| #include <device/smbus.h> |
| #include "chip.h" |
| |
| /** |
| * Do some S2881-specific HWM initialization for the ADT7463 chip. |
| * |
| * Should be factored out so that it can be more general. |
| * |
| * See Analog Devices ADT7463 datasheet, Rev C (2004): |
| * http://www.analog.com/en/prod/0,,766_825_ADT7463,00.html |
| */ |
| static void adt7463_init(device_t adt7463) |
| { |
| int result; |
| |
| printk(BIOS_DEBUG, "ADT7463 is %s\n", dev_path(adt7463)); |
| |
| /* Set all fans to 'Fastest Speed Calculated by All 3 Temperature |
| * Channels Controls PWMx'. |
| */ |
| result = smbus_write_byte(adt7463, 0x5c, 0xc2); |
| result = smbus_write_byte(adt7463, 0x5d, 0xc2); |
| result = smbus_write_byte(adt7463, 0x5e, 0xc2); |
| |
| /* Make sure that our fans never stop when temp. falls below Tmin, |
| * but rather keep going at minimum duty cycle (applies to automatic |
| * fan control mode only). |
| */ |
| result = smbus_write_byte(adt7463, 0x62, 0xc0); |
| |
| /* Set minimum PWM duty cycle to 25%, rather than the default 50%. */ |
| result = smbus_write_byte(adt7463, 0x64, 0x40); |
| result = smbus_write_byte(adt7463, 0x65, 0x40); |
| result = smbus_write_byte(adt7463, 0x66, 0x40); |
| |
| /* Set Tmin to 55C, rather than the default 90C. Above this temperature |
| * the fans will start blowing harder as temperature increases |
| * (automatic mode only). |
| */ |
| result = smbus_write_byte(adt7463, 0x67, 0x37); |
| result = smbus_write_byte(adt7463, 0x68, 0x37); |
| result = smbus_write_byte(adt7463, 0x69, 0x37); |
| |
| /* Set THERM limit to 70C, rather than the default 100C. |
| * The fans will kick in at 100% if the sensors reach this temperature, |
| * (only in automatic mode, but supposedly even when hardware is |
| * locked up). This is a failsafe measure. |
| */ |
| result = smbus_write_byte(adt7463, 0x6a, 0x46); |
| result = smbus_write_byte(adt7463, 0x6b, 0x46); |
| result = smbus_write_byte(adt7463, 0x6c, 0x46); |
| |
| /* Remote temperature 1 offset (LSB == 0.25C). */ |
| result = smbus_write_byte(adt7463, 0x70, 0x02); |
| |
| /* Remote temperature 2 offset (LSB == 0.25C). */ |
| result = smbus_write_byte(adt7463, 0x72, 0x01); |
| |
| /* Set TACH measurements to normal (1/second). */ |
| result = smbus_write_byte(adt7463, 0x78, 0xf0); |
| |
| printk(BIOS_DEBUG, "ADT7463 properly initialized\n"); |
| } |
| |
| static void adt7463_noop(device_t dummy) |
| { |
| } |
| |
| static struct device_operations adt7463_operations = { |
| .read_resources = adt7463_noop, |
| .set_resources = adt7463_noop, |
| .enable_resources = adt7463_noop, |
| .init = adt7463_init, |
| }; |
| |
| static void enable_dev(struct device *dev) |
| { |
| dev->ops = &adt7463_operations; |
| } |
| |
| struct chip_operations drivers_i2c_adt7463_ops = { |
| CHIP_NAME("adt7463") |
| .enable_dev = enable_dev, |
| }; |