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author | Myles Watson <mylesgw@gmail.com> | 2010-06-17 16:16:56 +0000 |
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committer | Myles Watson <mylesgw@gmail.com> | 2010-06-17 16:16:56 +0000 |
commit | 7eac4450b32f6961d5abd8dae32c5eefc1a07c11 (patch) | |
tree | 455e0181fea42d7c6bab09878ef35dc666789977 /src/drivers/i2c/adt7463/adt7463.c | |
parent | e10757ed525cdd1a5263b9d79e284310c999c0f7 (diff) | |
download | coreboot-7eac4450b32f6961d5abd8dae32c5eefc1a07c11.tar.xz |
Always enable parent resources before child resources.
Always initialize parents before children.
Move s2881 code into a driver.
Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5633 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/drivers/i2c/adt7463/adt7463.c')
-rw-r--r-- | src/drivers/i2c/adt7463/adt7463.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/drivers/i2c/adt7463/adt7463.c b/src/drivers/i2c/adt7463/adt7463.c new file mode 100644 index 0000000000..7639028784 --- /dev/null +++ b/src/drivers/i2c/adt7463/adt7463.c @@ -0,0 +1,122 @@ +/* + * 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 dev) +{ + device_t smbus_dev, 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(BIOS_DEBUG, "SMBus controller found\n"); + + /* Find the ADT7463 device. */ + path.type = DEVICE_PATH_I2C; + path.i2c.device = 0x2d; + adt7463 = find_dev_path(smbus_dev->link_list, &path); + if (!adt7463) + die("ADT7463 not found\n"); + printk(BIOS_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(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 mainboard_ops = { + CHIP_NAME("adt7463") + .enable_dev = enable_dev, +}; |