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

2 files changed, 126 insertions, 0 deletions

diff --git a/src/drivers/i2c/adt7463/adt7463.c b/src/drivers/i2c/adt7463/adt7463.c
new file mode 100644
index 000000000..763902878
--- /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,
+};
diff --git a/src/drivers/i2c/adt7463/chip.h b/src/drivers/i2c/adt7463/chip.h
new file mode 100644
index 000000000..fdb22b95c
--- /dev/null
+++ b/src/drivers/i2c/adt7463/chip.h
@@ -0,0 +1,4 @@
+extern struct chip_operations drivers_i2c_adt7463_ops;
+
+struct drivers_i2c_adt7463_config {
+};