diff options
Diffstat (limited to 'src/mainboard/tyan/s2881/mainboard.c')
| -rw-r--r-- | src/mainboard/tyan/s2881/mainboard.c | 155 |
1 files changed, 154 insertions, 1 deletions
diff --git a/src/mainboard/tyan/s2881/mainboard.c b/src/mainboard/tyan/s2881/mainboard.c index e0aea30dd8..5917dbc733 100644 --- a/src/mainboard/tyan/s2881/mainboard.c +++ b/src/mainboard/tyan/s2881/mainboard.c @@ -1,9 +1,162 @@ +/* + * This file is part of the LinuxBIOS 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 "chip.h" +#include <console/console.h> +#include <device/smbus.h> + +/** + * Do some s2881-specific HWM initialization for the ADT7463 chip + * See Analog Devices ADT7463 datasheet, Rev C (2004): + * http://www.analog.com/en/prod/0,,766_825_ADT7463,00.html + */ +static void dummy_init(device_t dev) +{ + device_t smbus_dev; + device_t adt7463; + struct device_path path; + + int result; + + /* Find the smbus controller (amd-8111) */ + smbus_dev = dev_find_device(0x1022, 0x746b, 0); + if (!smbus_dev) { + die("SMBUS controller not found\n"); + } + printk_debug("smbus controller found\n"); + + /* Find the adt7463 device */ + path.type = DEVICE_PATH_I2C; + path.u.i2c.device = 0x2d; + adt7463 = find_dev_path(smbus_dev->link, &path); + if (!adt7463) { + die("adt7463 not found\n"); + } + printk_debug("adt7463 found\n"); + + /* 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_debug("adt7463 properly initilized"); +} + +static void dummy_noop(device_t dummy) +{ +} + +static struct device_operations dummy_operations = { + .read_resources = dummy_noop, + .set_resources = dummy_noop, + .enable_resources = dummy_noop, + .init = dummy_init, +}; + +static unsigned int scan_root_bus(device_t root, unsigned int max) +{ + struct device_path path; + device_t dummy; + unsigned link_i; + + max = root_dev_scan_bus(root, max); + + printk_debug("scan_root_bus ok\n"); + + /* The following is a little silly. We need a hook into the boot process *after* + * the ADT7643 device has been initialized. So we create this dummy device, and we + * put the ADT7643 s2881 specific settings in its init function, which gets called + * as the last device to be initialized. + */ + + link_i = root->links; + if (link_i >= MAX_LINKS) { + printk_debug("reached MAX_LINKS, not configuring adt7463"); + return max; + } + root->link[link_i].link = link_i; + root->link[link_i].dev = root; + root->link[link_i].children = 0; + root->links++; + + path.type = DEVICE_PATH_PNP; + path.u.pnp.port = 0; + path.u.pnp.device = 0; + dummy = alloc_dev(&root->link[link_i], &path); + dummy->ops = &dummy_operations; + + return max; +} + +static struct device_operations mainboard_operations = { + .read_resources = root_dev_read_resources, + .set_resources = root_dev_set_resources, + .enable_resources = root_dev_enable_resources, + .init = root_dev_init, + .scan_bus = scan_root_bus, +}; + +static void enable_dev(struct device *dev) +{ + dev->ops = &mainboard_operations; +} #if CONFIG_CHIP_NAME == 1 struct chip_operations mainboard_tyan_s2881_ops = { CHIP_NAME("Tyan S2881 Mainboard") + .enable_dev = enable_dev, }; #endif - |