superio/fintek: Add f81803A

Add f81803A plus the capability to control the fan with any fintek SIO.
This will be done through a common API, though currently only F81803A will
have it implemented.

BUG=none.
TEST=Tested later with padmelon board.

Change-Id: I3d336e76bccc38452b1b1aefef5d4a4f7ee129a8
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33623
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

10 files changed, 1170 insertions, 0 deletions

diff --git a/src/superio/fintek/Makefile.inc b/src/superio/fintek/Makefile.inc
index 796e5194d1..db683fdfe6 100644
--- a/src/superio/fintek/Makefile.inc
+++ b/src/superio/fintek/Makefile.inc
@@ -26,3 +26,4 @@ subdirs-y += f71872
 subdirs-y += f81216h
 subdirs-y += f81865f
 subdirs-y += f81866d
+subdirs-y += f81803a
diff --git a/src/superio/fintek/common/fan_api_call.c b/src/superio/fintek/common/fan_api_call.c
new file mode 100644
index 0000000000..1bd5b2e7d4
--- /dev/null
+++ b/src/superio/fintek/common/fan_api_call.c
@@ -0,0 +1,63 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Richard Spiegel <richard.spiegel@silverbackltd.com>
+ * Copyright (C) 2019 Silverback ltd.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <console/console.h>
+#include "fan_control.h"
+
+static int check_status(int status)
+{
+	if (status < HWM_STATUS_SUCCESS)
+		return status;
+	return HWM_STATUS_SUCCESS;	/* positive values are warnings only */
+}
+
+int set_fan(struct fintek_fan *fan_init)
+{
+	int s;
+
+	s = set_sensor_type(CONFIG_HWM_PORT, fan_init->sensor, fan_init->stype);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_fan_temperature_source(CONFIG_HWM_PORT, fan_init->fan, fan_init->temp_source);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_fan_type_mode(CONFIG_HWM_PORT, fan_init->fan, fan_init->ftype, fan_init->fmode);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_pwm_frequency(CONFIG_HWM_PORT, fan_init->fan, fan_init->fan_freq);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_fan_speed_change_rate(CONFIG_HWM_PORT, fan_init->fan, fan_init->rate_up,
+				fan_init->rate_down);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_fan_follow(CONFIG_HWM_PORT, fan_init->fan, fan_init->follow);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	s = set_sections(CONFIG_HWM_PORT, fan_init->fan, fan_init->boundaries,
+				fan_init->sections);
+	if (check_status(s) != HWM_STATUS_SUCCESS)
+		return s;
+
+	printk(BIOS_DEBUG, "Fan %d completed\n", fan_init->fan);
+	return HWM_STATUS_SUCCESS;
+}
diff --git a/src/superio/fintek/common/fan_control.h b/src/superio/fintek/common/fan_control.h
new file mode 100644
index 0000000000..fbe784bfa1
--- /dev/null
+++ b/src/superio/fintek/common/fan_control.h
@@ -0,0 +1,199 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Richard Spiegel <richard.spiegel@silverbackltd.com>
+ * Copyright (C) 2019 Silverback ltd.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#ifndef SUPERIO_FINTEK_FAN_CONTROL_H
+#define SUPERIO_FINTEK_FAN_CONTROL_H
+
+#include <stdint.h>
+#include <arch/io.h>
+
+typedef enum {
+	IGNORE_SENSOR = 0,
+	EXTERNAL_SENSOR1,
+	EXTERNAL_SENSOR2,
+	EXTERNAL_SENSOR3,
+	EXTERNAL_SENSOR4
+} external_sensor;
+
+typedef enum {
+	TEMP_SENSOR_THERMISTOR = 0,
+	TEMP_SENSOR_BJT,
+	TEMP_SENSOR_DEFAULT
+} temp_sensor_type;
+
+typedef enum {
+	FAN_TYPE_PWM_PUSH_PULL = 0,
+	FAN_TYPE_DAC_POWER,
+	FAN_TYPE_PWM_OPEN_DRAIN,
+	FAN_TYPE_RESERVED
+} fan_type;
+#define FAN_TYPE_PWM_CHECK			1 /* bit 0 must be 0 for PWM */
+
+typedef enum {
+	FAN_MODE_AUTO_RPM = 0,
+	FAN_MODE_AUTO_PWM_DAC,
+	FAN_MODE_MANUAL_RPM,
+	FAN_MODE_MANUAL_PWM_DAC,
+	FAN_MODE_DEFAULT
+} fan_mode;
+
+typedef enum {
+	FAN_PWM_FREQ_23500 = 0,
+	FAN_PWM_FREQ_11750,
+	FAN_PWM_FREQ_5875,
+	FAN_PWM_FREQ_220
+} fan_pwm_freq;
+
+typedef enum {
+	FAN_TEMP_PECI = 0,
+	FAN_TEMP_EXTERNAL_1,
+	FAN_TEMP_EXTERNAL_2,
+	FAN_TEMP_TSI = 4,
+	FAN_TEMP_MXM,
+} fan_temp_source;
+
+typedef enum {
+	FAN_UP_RATE_2HZ = 0,
+	FAN_UP_RATE_5HZ,
+	FAN_UP_RATE_10HZ,
+	FAN_UP_RATE_20HZ,
+	FAN_UP_RATE_DEFAULT,
+	FAN_UP_RATE_JUMP = 8
+} fan_rate_up;
+
+typedef enum {
+	FAN_DOWN_RATE_2HZ = 0,
+	FAN_DOWN_RATE_5HZ,
+	FAN_DOWN_RATE_10HZ,
+	FAN_DOWN_RATE_20HZ,
+	FAN_DOWN_RATE_DEFAULT,
+	FAN_DOWN_RATE_SAME_AS_UP,
+	FAN_DOWN_RATE_JUMP = 8
+} fan_rate_down;
+
+typedef enum {
+	FAN_FOLLOW_STEP = 0,
+	FAN_FOLLOW_INTERPOLATION
+} fan_follow;
+
+struct fintek_fan {
+	uint8_t fan;
+	external_sensor sensor;
+	temp_sensor_type stype;
+	fan_temp_source temp_source;
+	fan_type ftype;
+	fan_mode fmode;
+	fan_pwm_freq fan_freq;
+	fan_rate_up rate_up;
+	fan_rate_down rate_down;
+	fan_follow follow;
+	uint8_t *boundaries;
+	uint8_t *sections;
+};
+
+#define HWM_STATUS_SUCCESS			0
+#define HWM_STATUS_INVALID_FAN			-1
+#define HWM_STATUS_INVALID_TEMP_SOURCE		-2
+#define HWM_STATUS_INVALID_TYPE			-3
+#define HWM_STATUS_INVALID_MODE			-4
+#define HWM_STATUS_INVALID_RATE			-5
+#define HWM_STATUS_INVALID_FREQUENCY		-6
+#define HWM_STATUS_INVALID_TEMP_SENSOR		-7
+#define HWM_STATUS_INVALID_BOUNDARY_VALUE	-8
+#define HWM_STATUS_INVALID_SECTION_VALUE	-9
+#define HWM_STATUS_BOUNDARY_WRONG_ORDER		-10
+#define HWM_STATUS_SECTIONS_WRONG_ORDER		-11
+#define HWM_STATUS_WARNING_SENSOR_DISCONECTED	1
+#define HWM_STATUS_WARNING_FAN_NOT_PWM		2
+
+#define CPU_DAMAGE_TEMP				110
+
+/*
+ * Boundaries order is from highest temp. to lowest. Values from 0 to 127.
+ * Boundaries should be defined as u8 boundaries[FINTEK_BOUNDARIES_SIZE].
+ */
+#define FINTEK_BOUNDARIES_SIZE			4
+/*
+ * Section defines the duty_cycle/voltage to be used based on where the
+ * temperature lies with respect to the boundaries. There are 5 sections
+ * (4 boundaries) and the order must be from highest to lowest. Values
+ * from 0% to 100%, will be converted internally to percent of 255.
+ * Sections should be defined as u8 sections[FINTEK_SECTIONS_SIZE].
+ */
+#define FINTEK_SECTIONS_SIZE			5
+
+/*
+ * When using external sensor, its type must be defined. When using PECI,
+ * TSI or MXM use IGNORE_SENSOR to indicate so.
+ */
+int set_sensor_type(u16 base_address, external_sensor sensor,
+						temp_sensor_type type);
+
+/*
+ * Define the temperature source used to control a fan.
+ */
+int set_fan_temperature_source(u16 base_address, u8 fan,
+						fan_temp_source source);
+
+/*
+ * Define if fan is controlled through PWM or absolute voltage powering it
+ * (DAC). Then, under mode, define if control is automatic (SIO) or manual
+ * (CPU, through ACPI). Notice there needs to be a match between type and
+ * mode (PWM with PWM or DAC with DAC).
+ */
+int set_fan_type_mode(u16 base_address, u8 fan, fan_type type, fan_mode mode);
+
+/*
+ * For fans controlled through pulse width, define the base frequency used.
+ */
+int set_pwm_frequency(u16 base_address, u8 fan, fan_pwm_freq frequency);
+
+/*
+ * For fintek SIO HWM there are 4 (temperature) boundaries points, defining
+ * 5 sections (1 fan speed per section). Start with the highest temperature/
+ * speed. Temperature is in Celsius, speed is in percentile of max speed. The
+ * highest speed should be 100%, no requirements for minimum speed, could be
+ * 0 or above 0.
+ */
+int set_sections(u16 base_address, u8 fan, u8 *boundaries, u8 *sections);
+
+/*
+ * Define how often temperature is measured to change fan speed.
+ */
+int set_fan_speed_change_rate(u16 base_address, u8 fan, fan_rate_up rate_up,
+						fan_rate_down rate_down);
+
+/*
+ * There a 2 ways a fan can be controlled: A single speed per section, or
+ * interpolation. Under interpolation, the section speed is the speed at the
+ * lowest temperature of the section (0 Celsius for the lowest section), and
+ * it's the speed of the next section at the boundary to the next section.
+ * In between these 2 points, it's a linear function. For example, midway
+ * between temperature points it'll have a speed that is midway between the
+ * section speed and next section speed. Obviously, there's no variation for
+ * the highest section, reason why it must be 100% max speed.
+ */
+int set_fan_follow(u16 base_address, u8 fan, fan_follow follow);
+
+/*
+ * This is an upper level API which calls all the above APIs in the
+ * appropriate order. Any API failure will be displayed. Alerts will
+ * also be displayed, but will not interrupt the sequence, while errors
+ * will interrupt the sequence.
+ */
+int set_fan(struct fintek_fan *fan_init);
+
+#endif /* SUPERIO_FINTEK_FAN_CONTROL_H */
diff --git a/src/superio/fintek/f81803a/Kconfig b/src/superio/fintek/f81803a/Kconfig
new file mode 100644
index 0000000000..e1aa537e78
--- /dev/null
+++ b/src/superio/fintek/f81803a/Kconfig
@@ -0,0 +1,28 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2009 Ronald G. Minnich
+## Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
+##
+## 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; version 2 of the License.
+##
+## 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.
+##
+
+config SUPERIO_FINTEK_F81803A
+	bool
+	select SUPERIO_FINTEK_COMMON_PRE_RAM
+
+config SUPERIO_FINTEK_FAN_CONTROL
+	bool
+	default n
+
+config SUPERIO_FINTEK_FAN_API_CALL
+	depends on SUPERIO_FINTEK_FAN_CONTROL
+	bool
+	default n
diff --git a/src/superio/fintek/f81803a/Makefile.inc b/src/superio/fintek/f81803a/Makefile.inc
new file mode 100644
index 0000000000..6fe13aaab7
--- /dev/null
+++ b/src/superio/fintek/f81803a/Makefile.inc
@@ -0,0 +1,30 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2011 Advanced Micro Devices, Inc.
+##
+## 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.
+##
+
+ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y)
+bootblock-$(CONFIG_SUPERIO_FINTEK_F81803A) += ../common/early_serial.c
+endif
+
+## Notice: For fan control at romstage, HWM must be initialized before
+## the API is called. Ramstage can use devicetree to initialize it.
+
+romstage-$(CONFIG_SUPERIO_FINTEK_F81803A) += ../common/early_serial.c
+romstage-$(CONFIG_SUPERIO_FINTEK_FAN_CONTROL) += fan_control.c
+romstage-$(CONFIG_SUPERIO_FINTEK_FAN_API_CALL) += ../common/fan_api_call.c
+
+ramstage-$(CONFIG_SUPERIO_FINTEK_F81803A) += superio.c
+ramstage-$(CONFIG_SUPERIO_FINTEK_FAN_CONTROL) += fan_control.c
+ramstage-$(CONFIG_SUPERIO_FINTEK_FAN_API_CALL) += ../common/fan_api_call.c
diff --git a/src/superio/fintek/f81803a/acpi/superio.asl b/src/superio/fintek/f81803a/acpi/superio.asl
new file mode 100644
index 0000000000..ae8e6dc242
--- /dev/null
+++ b/src/superio/fintek/f81803a/acpi/superio.asl
@@ -0,0 +1,266 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Christoph Grenz <christophg+cb@grenz-bonn.de>
+ * Copyright (C) 2013 secunet Security Networks AG
+ * Copyright (C) 2019, Silverback, ltd.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+/*
+ * Include this file into a mainboard's DSDT _SB device tree and it will
+ * expose the F81803A SuperIO and some of its functionality.
+ *
+ * It allows the change of IO ports, IRQs and DMA settings on logical
+ * devices, disabling and reenabling logical devices and controlling power
+ * saving mode on logical devices or the whole chip.
+ *
+ * LDN					State
+ * 0x1 UARTA			Implemented, partially tested
+ * 0x2 UARTB			Implemented, partially tested
+ * 0x4 HWM			Not implemented
+ * 0x5 KBC			Not implemented
+ * 0x6 GPIO6			Not implemented
+ * 0x7 WDT0&PLED		Not implemented
+ * 0xa ACPI/PME/ERP		Partially implemented
+ *
+ * Controllable through preprocessor defines:
+ * SUPERIO_DEV		Device identifier for this SIO (e.g. SIO0)
+ * SUPERIO_PNP_BASE	I/o address of the first PnP configuration register
+ * F81803A_SHOW_UARTA	If defined, UARTA will be exposed.
+ * F81803A_SHOW_UARTB	If defined, UARTB will be exposed.
+ * F81803A_SHOW_HWMON	If defined, the hardware monitor will be exposed.
+ * F81803A_SHOW_PME 	If defined, the PME/EARP/ACPI  will be exposed.
+ *
+ * Known issue:
+ * Do not enable UARTA and UARTB simultaneously, Linux boot will crash.
+ * Select one or the other.
+ */
+#undef SUPERIO_CHIP_NAME
+#define SUPERIO_CHIP_NAME F81803A
+#include <superio/acpi/pnp.asl>
+
+#undef PNP_DEFAULT_PSC
+#define PNP_DEFAULT_PSC Return (0) /* no power management */
+
+Device(SUPERIO_DEV) {
+	Name (_HID, EisaId("PNP0A05"))
+	Name (_STR, Unicode("Fintek F81803A Super I/O"))
+	Name (_UID, SUPERIO_UID(SUPERIO_DEV,))
+
+	/* Mutex for accesses to the configuration ports */
+	Mutex(CRMX, 1)
+
+	/* SuperIO configuration ports */
+	OperationRegion (CREG, SystemIO, SUPERIO_PNP_BASE, 0x02)
+	Field (CREG, ByteAcc, NoLock, Preserve)
+	{
+		PNP_ADDR_REG,	8,
+		PNP_DATA_REG,	8
+	}
+	IndexField (ADDR, DATA, ByteAcc, NoLock, Preserve)
+	{
+		Offset (0x07),
+		PNP_LOGICAL_DEVICE,	8, /* Logical device selector */
+		Offset (0x30),
+		PNP_DEVICE_ACTIVE,	1, /* Logical device activation */
+		Offset (0x60),
+		PNP_IO0_HIGH_BYTE,	8, /* First I/O port base - high byte */
+		PNP_IO0_LOW_BYTE,	8, /* First I/O port base - low byte */
+		Offset (0x62),
+		PNP_IO1_HIGH_BYTE,	8, /* Second I/O port base - high byte */
+		PNP_IO1_LOW_BYTE,	8, /* Second I/O port base - low byte */
+		Offset (0x70),
+		PNP_IRQ0,			8, /* First IRQ */
+		offset(0xFB),
+		APC5,				8, /* PME ACPI Control Register 5 */
+	}
+
+	Method(_CRS)
+	{
+		/* Announce the used i/o ports to the OS */
+		Return (ResourceTemplate () {
+			IO (Decode16, SUPERIO_PNP_BASE, SUPERIO_PNP_BASE, 0x01, 0x02)
+		})
+	}
+
+	#undef PNP_ENTER_MAGIC_1ST
+	#undef PNP_ENTER_MAGIC_2ND
+	#undef PNP_ENTER_MAGIC_3RD
+	#undef PNP_ENTER_MAGIC_4TH
+	#undef PNP_EXIT_MAGIC_1ST
+	#undef PNP_EXIT_SPECIAL_REG
+	#undef PNP_EXIT_SPECIAL_VAL
+	#define PNP_ENTER_MAGIC_1ST	0x87
+	#define PNP_ENTER_MAGIC_2ND	0x87
+	#define PNP_EXIT_MAGIC_1ST	0xaa
+	#include <superio/acpi/pnp_config.asl>
+
+#ifdef F81803A_SHOW_UARTA
+	#undef SUPERIO_UART_LDN
+	#undef SUPERIO_UART_PM_REG
+	#undef SUPERIO_UART_PM_VAL
+	#undef SUPERIO_UART_PM_LDN
+	#define SUPERIO_UART_LDN 1
+
+	Device (SUPERIO_ID(SER, SUPERIO_UART_LDN)) {
+		Name (_HID, EisaId ("PNP0501"))
+		Name (_UID, SUPERIO_UID(SER, SUPERIO_UART_LDN))
+
+		Method (_STA)
+		{
+			PNP_GENERIC_STA(SUPERIO_UART_LDN)
+		}
+
+		Method (_CRS, 0, Serialized)
+		{
+			Name (CRS, ResourceTemplate () {
+				IO (Decode16, 0x0000, 0x0000, 0x08, 0x08, IO0)
+				IRQNoFlags (IR0) {}
+			})
+			ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+			  PNP_READ_IO(PNP_IO0, CRS, IO0)
+			  PNP_READ_IRQ(PNP_IRQ0, CRS, IR0)
+			EXIT_CONFIG_MODE ()
+			Return (CRS)
+		}
+
+		Name (_PRS, ResourceTemplate ()
+		{
+			StartDependentFn (0,0) {
+				IO (Decode16, 0x03f8, 0x03f8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (0,0) {
+				IO (Decode16, 0x02f8, 0x02f8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (1,0) {
+				IO (Decode16, 0x03e8, 0x03e8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (1,0) {
+				IO (Decode16, 0x02e8, 0x02e8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (2,0) {
+				IO (Decode16, 0x0100, 0x0ff8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			EndDependentFn()
+		})
+
+		Method (_SRS, 1, Serialized)
+		{
+			Name (TMPL, ResourceTemplate () {
+				IO (Decode16, 0x0000, 0x0000, 0x00, 0x00, IO0)
+				IRQNoFlags (IR0) {}
+			})
+			ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+			  PNP_WRITE_IO(PNP_IO0, Arg0, IO0)
+			  PNP_WRITE_IRQ(PNP_IRQ0, Arg0, IR0)
+			  Store (One, PNP_DEVICE_ACTIVE)
+			EXIT_CONFIG_MODE ()
+		}
+	}
+#endif
+
+#ifdef F81803A_SHOW_UARTB
+	#undef SUPERIO_UART_LDN
+	#undef SUPERIO_UART_PM_REG
+	#undef SUPERIO_UART_PM_VAL
+	#undef SUPERIO_UART_PM_LDN
+	#define SUPERIO_UART_LDN 2
+
+	Device (SUPERIO_ID(SER, SUPERIO_UART_LDN)) {
+		Name (_HID, EisaId ("PNP0501"))
+		Name (_UID, SUPERIO_UID(SER, SUPERIO_UART_LDN))
+
+		Method (_STA)
+		{
+			PNP_GENERIC_STA(SUPERIO_UART_LDN)
+		}
+
+		Method (_CRS, 0, Serialized)
+		{
+			Name (CRS, ResourceTemplate () {
+				IO (Decode16, 0x0000, 0x0000, 0x08, 0x08, IO0)
+				IRQNoFlags (IR0) {}
+			})
+			ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+			  PNP_READ_IO(PNP_IO0, CRS, IO0)
+			  PNP_READ_IRQ(PNP_IRQ0, CRS, IR0)
+			EXIT_CONFIG_MODE ()
+			Return (CRS)
+		}
+
+		Name (_PRS, ResourceTemplate ()
+		{
+			StartDependentFn (0,0) {
+				IO (Decode16, 0x03f8, 0x03f8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (0,0) {
+				IO (Decode16, 0x02f8, 0x02f8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (1,0) {
+				IO (Decode16, 0x03e8, 0x03e8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (1,0) {
+				IO (Decode16, 0x02e8, 0x02e8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			StartDependentFn (2,0) {
+				IO (Decode16, 0x0100, 0x0ff8, 0x08, 0x08)
+				IRQNoFlags () {3,4,5,7,9,10,11,12}
+			}
+			EndDependentFn()
+		})
+
+		Method (_SRS, 1, Serialized)
+		{
+			Name (TMPL, ResourceTemplate () {
+				IO (Decode16, 0x0000, 0x0000, 0x00, 0x00, IO0)
+				IRQNoFlags (IR0) {}
+			})
+			ENTER_CONFIG_MODE (SUPERIO_UART_LDN)
+			  PNP_WRITE_IO(PNP_IO0, Arg0, IO0)
+			  PNP_WRITE_IRQ(PNP_IRQ0, Arg0, IR0)
+			  Store (One, PNP_DEVICE_ACTIVE)
+			EXIT_CONFIG_MODE ()
+		}
+	}
+#endif
+
+#ifdef F81803A_SHOW_PME
+	#undef SUPERIO_PME_LDN
+	#define SUPERIO_PME_LDN 0x0A
+
+	OperationRegion(APCx, SystemIO, APC5, 0x01)
+	Field(APCx, ByteAcc, Nolock, Preserve) /* bits in PME ACPI CONTROL Reg 5*/
+	{
+		Offset(0x00), /*Control Reg 5 */
+		, 7,
+		PSIN, 1 /* PSIN_FLAG  */
+	}
+
+	/* routine to clear PSIN_FLAG in ACPI_CONTROL_REG_5 of SIO */
+	Method(CPSI, 0, Serialized)
+	{
+		/*   DBG0("SIO CPSI")*/
+		ENTER_CONFIG_MODE(SUPERIO_PME_LDN)
+		Store(1, PSIN)
+		EXIT_CONFIG_MODE()
+	}
+#endif
+}
diff --git a/src/superio/fintek/f81803a/f81803a.h b/src/superio/fintek/f81803a/f81803a.h
new file mode 100644
index 0000000000..c986cb806e
--- /dev/null
+++ b/src/superio/fintek/f81803a/f81803a.h
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ */
+
+/*
+ * Datasheet:
+ *  - Name: F81803A
+ */
+
+#ifndef SUPERIO_FINTEK_F81803_H
+#define SUPERIO_FINTEK_F81803_H
+
+#define LDN_REG				0x07	/* Not defined under PNP */
+/* Logical Device Numbers (LDN) */
+  #define F81803A_SP1			0x01	/* UART1 */
+  #define F81803A_SP2			0x02	/* UART2 */
+  #define F81803A_HWM			0x04	/* Hardware Monitor */
+  #define F81803A_KBC			0x05	/* Keyboard/Mouse */
+  #define F81803A_GPIO			0x06	/* General Purpose I/O (GPIO) */
+  #define F81803A_WDT			0x07	/* Watch Dog Timer */
+  #define F81803A_PME			0x0a	/* Power Management Events (PME) */
+
+/*  Global Control Registers */
+#define CLOCK_SELECT_REG		0x26
+#define   FUNC_PROG_SELECT		(1<<3)
+#define PORT_SELECT_REG			0x27
+
+#define TSI_LEVEL_SELECT_REG		0x28	/* FUNC_PROG_SEL = 0 */
+#define TSI_PIN_SELECT_REG		0x28	/* FUNC_PROG_SEL = 1 */
+#define MULTI_FUNC_SEL_REG1		0x29
+#define MULTI_FUNC_SEL_REG2		0x2A
+#define MULTI_FUNC_SEL_REG3		0x2B
+#define MULTI_FUNC_SEL_REG		0x2C
+#define WAKEUP_CONTROL_REG		0x2d
+
+/* LUN A - PME, ACPI, ERP */
+#define PME_DEVICE_ENABLE_REG		0x30
+#define   PME_ENABLE			(1<<0)
+#define PME_ERP_ENABLE_REG		0xE0
+#define   ERP_ENABLE			(1<<7)
+#define   ERP_PME_EN			(1<<1)
+#define   ERP_PSOUT_EN			(1<<0)
+#define PME_ERP_CONTROL_1_REG		0xE1
+#define PME_ERP_CONTROL_2_REG		0xE2
+#define PME_ERP_PSIN_DEBOUNCE_REG	0xE3
+#define PME_ERP_WAKEUP_ENABLE_REG	0xE8
+#define PME_ERP_MODE_SELECT_REG		0xEC
+#define PME_EVENT_ENABLE_1_REG		0xF0
+#define PME_EVENT_STATUS_1_REG		0xF1
+#define PME_EVENT_ENABLE_2_REG		0xF2
+#define PME_EVENT_STATUS_2_REG		0xF3
+#define PME_ACPI_CONTROL_1_REG		0xF4
+#define PME_ACPI_CONTROL_2_REG		0xF5
+#define PME_ACPI_CONTROL_3_REG		0xF6
+#define PME_ACPI_CONTROL_4_REG		0xF7
+#define PME_ACPI_CONTROL_5_REG		0xFB
+#define PME_ACPI_CONTROL_6_REG		0xFC
+
+#endif /* SUPERIO_FINTEK_F81803_H */
diff --git a/src/superio/fintek/f81803a/f81803a_hwm.h b/src/superio/fintek/f81803a/f81803a_hwm.h
new file mode 100644
index 0000000000..a7647057d1
--- /dev/null
+++ b/src/superio/fintek/f81803a/f81803a_hwm.h
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Richard Spiegel <richard.spiegel@silverbackltd.com>
+ * Copyright (C) 2019 Silverback ltd.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#ifndef SUPERIO_FINTEK_F81803_HWM_H
+#define SUPERIO_FINTEK_F81803_HWM_H
+
+#define TP_SENSOR_TYPE				0x6b
+#define   TP_SENSOR1_TYPE_SHIFT			1
+#define   TP_SENSOR2_TYPE_SHIFT			2
+#define   TP_SENSOR_TYPE_MASK			0x01
+#define TP_DIODE_STATUS				0x6f
+#define   TP_MMX_OPEN				0x40
+#define   TP_PECI_OPEN				0x20
+#define   TP_TSI_OPEN				0x10
+#define   TP_EXTERNAL_SENSOR2_OPEN		0x04
+#define   TP_EXTERNAL_SENSOR1_OPEN		0x02
+
+#define FAN_TYPE_REG				0x94
+#define   FAN_TYPE_SHIFT(fan)			((fan - 1) * 2)
+#define   FAN_TYPE_MASK				0x03
+#define FAN_MODE_REG				0x96
+	/* FUNC_PROG_SEL = 0 */
+#define   FAN_MODE_SHIFT(fan)			((fan - 1) * 4)
+#define   FAN_MODE_MASK				0x07
+	/* FUNC_PROG_SEL = 1 */
+#define   FAN1_ADJ_SEL_SHIFT			0
+#define   FAN1_ADJ_SEL_MASK			0x07
+#define   FAN_FREQ_SEL_ADD_SHIFT(fan)		(fan + 2)
+#define FAN_UP_RATE_REG				0x9a
+#define   FAN_RATE_SHIFT(fan)			((fan - 1) * 2)
+#define   FAN_RATE_MASK				0x03
+#define FAN_DOWN_RATE_REG			0x9b
+#define   FAN_DOWN_RATE_DIFF_FROM_UP_SHIFT	7	/* FUNC_PROG_SEL = 1 */
+#define   FAN_DIRECT_LOAD_EN_SHIFT		6	/* FUNC_PROG_SEL = 1 */
+#define FAN_FAULT_TIME_REG			0x9f
+#define   FAN_FUNC_PROG_SEL_SHIFT		7
+
+#define FAN_BOUND_TEMP				0xa6	/* 4 temperatures */
+#define FAN_SECTION_SPEED			0xaa	/* 5 sections */
+#define FAN_TMP_MAPPING				0xaf
+#define  FAN_TEMP_SEL_HIGH_SHIFT		7
+#define  FAN_PWM_FREQ_SEL_SHIFT			6
+#define  FAN_INTERPOLATION_SHIFT		4
+#define  FAN_JUMP_UP_SHIFT			3
+#define  FAN_JUMP_DOWN_SHIFT			2
+#define  FAN_TEMP_SEL_LOW_SHIFT			0
+#define  FAN_TEMP_SEL_LOW_MASK			0x03
+#define  FAN_BIT_MASK				0x01
+
+#define FAN_ADJUST(fan, start)			(((fan - 1) * 0x10) + start)
+
+#define STATUS_INVALID_VALUE			-1
+#define STATUS_INVALID_ORDER			-2
+
+#define FIRST_FAN				1
+#define LAST_FAN				2
+#define MAX_DUTY				100
+
+#endif /* SUPERIO_FINTEK_F81803_HWM_H */
diff --git a/src/superio/fintek/f81803a/fan_control.c b/src/superio/fintek/f81803a/fan_control.c
new file mode 100644
index 0000000000..17ae9c6a20
--- /dev/null
+++ b/src/superio/fintek/f81803a/fan_control.c
@@ -0,0 +1,362 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Richard Spiegel <richard.spiegel@silverbackltd.com>
+ * Copyright (C) 2019 Silverback ltd.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <console/console.h>
+#include "../common/fan_control.h"
+#include "f81803a_hwm.h"
+
+static const char msg_err_invalid[] = "Error: invalid";
+static const char msg_err_wrong_order[] = "Error: wrong order,";
+static const char msg_err_fan[] = "fan";
+static const char msg_err_temp_source[] = "temperature source";
+static const char msg_err_type[] = "type";
+static const char msg_err_mode[] = "mode";
+static const char msg_err_rate[] = "change rate";
+static const char msg_err_frequency[] = "frequency";
+static const char msg_err_temp_sensor[] = "temperature sensor";
+static const char msg_err_bondary[] = "boundary";
+static const char msg_err_section[] = "section";
+static const char no_msg[] = "";
+
+struct cross_ref {
+	int selection;
+	const char *message;
+};
+static struct cross_ref msg_table[] = {
+	{HWM_STATUS_INVALID_FAN,		msg_err_fan},
+	{HWM_STATUS_INVALID_TEMP_SOURCE,	msg_err_temp_source},
+	{HWM_STATUS_INVALID_TYPE,		msg_err_type},
+	{HWM_STATUS_INVALID_MODE,		msg_err_mode},
+	{HWM_STATUS_INVALID_RATE,		msg_err_rate},
+	{HWM_STATUS_INVALID_FREQUENCY,		msg_err_frequency},
+	{HWM_STATUS_INVALID_TEMP_SENSOR,	msg_err_temp_sensor},
+	{0, NULL},
+};
+
+static const char *get_msg(int err)
+{
+	int i = 0;
+	while (msg_table[i].selection) {
+		if (msg_table[i].selection == err)
+			return msg_table[i].message;
+		i++;
+	}
+	return no_msg;
+}
+
+static int message_invalid_1(int err, u8 fan)
+{
+	if (err == HWM_STATUS_INVALID_FAN)
+		printk(BIOS_ERR, "%s %s %d!\n", msg_err_invalid, get_msg(err), fan);
+	else
+		printk(BIOS_ERR, "%s Fan %d %s!\n", msg_err_invalid, fan, get_msg(err));
+	return err;
+}
+
+static int message_invalid_2(int err, u8 fan)
+{
+	switch (err) {
+	case HWM_STATUS_INVALID_BOUNDARY_VALUE:
+		printk(BIOS_ERR, "%s fan %d %s value!\n", msg_err_invalid, fan,
+					msg_err_bondary);
+		break;
+	case HWM_STATUS_INVALID_SECTION_VALUE:
+		printk(BIOS_ERR, "%s fan %d %s value!\n", msg_err_invalid, fan,
+					msg_err_section);
+		break;
+	case HWM_STATUS_BOUNDARY_WRONG_ORDER:
+		printk(BIOS_ERR, "%s fan %d %s!\n", msg_err_wrong_order, fan, msg_err_bondary);
+		break;
+	case HWM_STATUS_SECTIONS_WRONG_ORDER:
+		printk(BIOS_ERR, "%s fan %d %s!\n", msg_err_wrong_order, fan, msg_err_section);
+		break;
+	default:
+		break;
+	}
+	return err;
+}
+
+static void write_hwm_reg(u16 address, u8 index, u8 value)
+{
+	u16 index_add, data_add;
+	index_add = address | 0x0001;	/* force odd address */
+	data_add = index_add + 1;
+	outb(index, index_add);
+	outb(value, data_add);
+}
+
+static u8 read_hwm_reg(u16 address, u8 index)
+{
+	u16 index_add, data_add;
+	index_add = address | 0x0001;	/* force odd address */
+	data_add = index_add + 1;
+	outb(index, index_add);
+	return inb(data_add);
+}
+
+static void hwm_reg_modify(u16 address, u8 index, u8 shift, u8 mask,
+								u8 value)
+{
+	u8 use_mask = mask << shift;
+	u8 use_value = (value & mask) << shift;
+	u8 temp = read_hwm_reg(address, index);
+
+	temp &= ~use_mask;
+	temp |= use_value;
+	write_hwm_reg(address, index, temp);
+}
+
+/*
+ * Registers 0x94,0x95, 0x96 and 0x9b have 2 versions (banks) selected through
+ * bit 7 of register 0x9f.
+ */
+static inline void select_hwm_bank(u16 address, u8 value)
+{
+	hwm_reg_modify(address, FAN_FAULT_TIME_REG, FAN_FUNC_PROG_SEL_SHIFT,
+				FAN_BIT_MASK, value);
+}
+
+/*
+ * Boundaries and sections must be presented in the same order as in the HWM
+ * registers, that is, from highest value to lowest. This procedure checks for
+ * the correct order.
+ */
+static int check_value_seq(u8 *values, u8 count)
+{
+	u8 last_value = CPU_DAMAGE_TEMP;
+	u8 current_value, i;
+	for (i = 0; i < count; i++) {
+		current_value = values[i];
+		if (current_value  > CPU_DAMAGE_TEMP)
+			return STATUS_INVALID_VALUE;
+		if (current_value >= last_value)
+			return STATUS_INVALID_ORDER;
+		last_value = current_value;
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_sensor_type(u16 base_address, external_sensor sensor,
+						temp_sensor_type type)
+{
+	u8 sensor_status = read_hwm_reg(base_address, TP_DIODE_STATUS);
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	switch (sensor) {
+	case EXTERNAL_SENSOR1:
+		if (sensor_status & TP_EXTERNAL_SENSOR1_OPEN) {
+			printk(BIOS_WARNING, "Sensor 1 disconected!\n");
+			return HWM_STATUS_WARNING_SENSOR_DISCONECTED;
+		}
+		hwm_reg_modify(base_address, TP_SENSOR_TYPE,
+			TP_SENSOR1_TYPE_SHIFT, TP_SENSOR_TYPE_MASK, type);
+		break;
+	case EXTERNAL_SENSOR2:
+		if (sensor_status & TP_EXTERNAL_SENSOR2_OPEN) {
+			printk(BIOS_WARNING, "Sensor 2 disconected!\n");
+			return HWM_STATUS_WARNING_SENSOR_DISCONECTED;
+		}
+		hwm_reg_modify(base_address, TP_SENSOR_TYPE,
+			TP_SENSOR2_TYPE_SHIFT, TP_SENSOR_TYPE_MASK, type);
+		break;
+	case IGNORE_SENSOR:
+		break;
+	default:
+		return message_invalid_1(HWM_STATUS_INVALID_TEMP_SENSOR, 0);
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_fan_temperature_source(u16 base_address, u8 fan,
+						fan_temp_source source)
+{
+	u8 index, high_value, low_value;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+	index = FAN_ADJUST(fan, FAN_TMP_MAPPING);
+	high_value = (source >> 2) & FAN_BIT_MASK;
+	low_value = source & FAN_TEMP_SEL_LOW_MASK;
+	hwm_reg_modify(base_address, index, FAN_TEMP_SEL_HIGH_SHIFT,
+				FAN_BIT_MASK, high_value);
+	hwm_reg_modify(base_address, index, FAN_TEMP_SEL_LOW_SHIFT,
+				FAN_TEMP_SEL_LOW_MASK, low_value);
+	/*
+	 * Fan 1 has a weight mechanism for adjusting for next fan speed. Basically the idea is
+	 * to react more aggressively (normally CPU fan) based on how high another temperature
+	 * (system, thermistor near the CPU, anything) is. This would be highly platform
+	 * dependent, and by setting the weight temperature same as the control temperature.
+	 * This code cancels the weight mechanism and make it work with any board. If a board
+	 * wants to use the weight mechanism, OEM should implement it after calling the main
+	 * HWM programming.
+	 */
+	if (fan == FIRST_FAN) {
+		select_hwm_bank(base_address, 1);
+		hwm_reg_modify(base_address, FAN_MODE_REG,
+				FAN1_ADJ_SEL_SHIFT, FAN1_ADJ_SEL_MASK, source);
+		select_hwm_bank(base_address, 0);
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_fan_type_mode(u16 base_address, u8 fan, fan_type type, fan_mode mode)
+{
+	u8 shift;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+	select_hwm_bank(base_address, 0);
+	if (type < FAN_TYPE_RESERVED) {
+		shift = FAN_TYPE_SHIFT(fan);
+		hwm_reg_modify(base_address, FAN_TYPE_REG, shift,
+						FAN_TYPE_MASK, type);
+	}
+	if (mode < FAN_MODE_DEFAULT) {
+		shift = FAN_MODE_SHIFT(fan);
+		hwm_reg_modify(base_address, FAN_MODE_REG, shift,
+						FAN_MODE_MASK, mode);
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_pwm_frequency(u16 base_address, u8 fan, fan_pwm_freq frequency)
+{
+	u8 shift, index, byte;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+	byte = read_hwm_reg(base_address, FAN_TYPE_REG);
+	shift = FAN_TYPE_SHIFT(fan);
+	if (((byte >> shift) & FAN_TYPE_PWM_CHECK) == FAN_TYPE_PWM_CHECK) {
+		printk(BIOS_WARNING, "Fan %d not programmed as PWM!\n", fan);
+		return HWM_STATUS_WARNING_FAN_NOT_PWM;
+	}
+	select_hwm_bank(base_address, 1);
+	shift = FAN_FREQ_SEL_ADD_SHIFT(fan);
+	byte = (frequency >> 1) & FAN_BIT_MASK;
+	hwm_reg_modify(base_address, FAN_MODE_REG, shift, FAN_BIT_MASK,
+									byte);
+	select_hwm_bank(base_address, 0);
+	index = FAN_ADJUST(fan, FAN_TMP_MAPPING);
+	byte = frequency & FAN_BIT_MASK;
+	hwm_reg_modify(base_address, index, FAN_PWM_FREQ_SEL_SHIFT,
+							FAN_BIT_MASK, byte);
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_sections(u16 base_address, u8 fan, u8 *boundaries, u8 *sections)
+{
+	int status, temp;
+	u8 i, index, value;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+	status = check_value_seq(boundaries,
+				FINTEK_BOUNDARIES_SIZE);
+	if (status != HWM_STATUS_SUCCESS) {
+		if (status == STATUS_INVALID_VALUE)
+			return message_invalid_2(HWM_STATUS_INVALID_BOUNDARY_VALUE, fan);
+		return message_invalid_2(HWM_STATUS_BOUNDARY_WRONG_ORDER, fan);
+	}
+	status = check_value_seq(sections,
+				FINTEK_SECTIONS_SIZE);
+	if (status != HWM_STATUS_SUCCESS) {
+		if (status == STATUS_INVALID_VALUE)
+			return message_invalid_2(HWM_STATUS_INVALID_SECTION_VALUE, fan);
+		return message_invalid_2(HWM_STATUS_SECTIONS_WRONG_ORDER, fan);
+	}
+	index = FAN_ADJUST(fan, FAN_BOUND_TEMP);
+	for (i = 0; i < FINTEK_BOUNDARIES_SIZE; i++) {
+		value = boundaries[i];
+		write_hwm_reg(base_address, index, value);
+		index++;
+	}
+	index = FAN_ADJUST(fan, FAN_SECTION_SPEED);
+	for (i = 0; i < FINTEK_SECTIONS_SIZE; i++) {
+		value = sections[i];
+		if (value > 100)
+			return message_invalid_2(HWM_STATUS_INVALID_SECTION_VALUE, fan);
+		temp = (255 * value) / 100;
+		value = (u8) (temp & 0x00ff);
+		write_hwm_reg(base_address, index, value);
+		index++;
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_fan_speed_change_rate(u16 base_address, u8 fan, fan_rate_up rate_up,
+						fan_rate_down rate_down)
+{
+	u8 shift, index;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+
+	index = FAN_ADJUST(fan, FAN_TMP_MAPPING);
+	shift = FAN_RATE_SHIFT(fan);
+
+	if (rate_up == FAN_UP_RATE_JUMP) {
+		hwm_reg_modify(base_address, index, FAN_JUMP_UP_SHIFT,
+							FAN_BIT_MASK, 1);
+	} else {
+		hwm_reg_modify(base_address, index, FAN_JUMP_UP_SHIFT,
+							FAN_BIT_MASK, 0);
+		if (rate_up < FAN_UP_RATE_DEFAULT) {
+			hwm_reg_modify(base_address,	FAN_UP_RATE_REG,
+					shift, FAN_RATE_MASK, rate_up);
+		}
+	}
+
+	if (rate_down == FAN_DOWN_RATE_JUMP) {
+		hwm_reg_modify(base_address, index, FAN_JUMP_DOWN_SHIFT,
+							FAN_BIT_MASK, 1);
+	} else {
+		hwm_reg_modify(base_address, index, FAN_JUMP_UP_SHIFT,
+							FAN_BIT_MASK, 0);
+		select_hwm_bank(base_address, 0);
+		if (rate_down < FAN_DOWN_RATE_DEFAULT) {
+			hwm_reg_modify(base_address,	FAN_DOWN_RATE_REG,
+					shift, FAN_RATE_MASK, rate_down);
+			hwm_reg_modify(base_address, FAN_DOWN_RATE_REG,
+					FAN_DOWN_RATE_DIFF_FROM_UP_SHIFT,
+					FAN_BIT_MASK, 0);
+		}
+		if (rate_down == FAN_DOWN_RATE_SAME_AS_UP) {
+			hwm_reg_modify(base_address, FAN_DOWN_RATE_REG,
+					FAN_DOWN_RATE_DIFF_FROM_UP_SHIFT,
+					FAN_BIT_MASK, 1);
+		}
+	}
+	return HWM_STATUS_SUCCESS;
+}
+
+int set_fan_follow(u16 base_address, u8 fan, fan_follow follow)
+{
+	u8 index;
+
+	printk(BIOS_DEBUG, "%s\n", __func__);
+	if ((fan < FIRST_FAN) || (fan > LAST_FAN))
+		return message_invalid_1(HWM_STATUS_INVALID_FAN, fan);
+	index = FAN_ADJUST(fan, FAN_TMP_MAPPING);
+	hwm_reg_modify(base_address, index, FAN_INTERPOLATION_SHIFT,
+				FAN_BIT_MASK, follow);
+	return HWM_STATUS_SUCCESS;
+}
diff --git a/src/superio/fintek/f81803a/superio.c b/src/superio/fintek/f81803a/superio.c
new file mode 100644
index 0000000000..a07b69e97e
--- /dev/null
+++ b/src/superio/fintek/f81803a/superio.c
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ */
+
+#include <device/device.h>
+#include <device/pnp.h>
+#include <superio/conf_mode.h>
+#include <console/console.h>
+#include <stdlib.h>
+#include <pc80/keyboard.h>
+#include "f81803a.h"
+
+static void f81803a_pme_init(struct device *dev)
+{
+	pnp_enter_conf_mode(dev);
+	pnp_write_config(dev, LDN_REG, F81803A_PME);
+	/* enable ERP function*/
+	/* also set PSIN to generate PSOUT*/
+	pnp_write_config(dev, PME_ERP_ENABLE_REG, ERP_ENABLE | ERP_PSOUT_EN);
+	pnp_exit_conf_mode(dev);
+}
+
+static void f81803a_init(struct device *dev)
+{
+	if (!dev->enabled)
+		return;
+	switch (dev->path.pnp.device) {
+	/* TODO: Might potentially need code for GPIO or WDT. */
+	case F81803A_KBC:
+		pc_keyboard_init(NO_AUX_DEVICE);
+		break;
+	case F81803A_PME:
+		f81803a_pme_init(dev);
+		break;
+	}
+
+}
+
+static struct device_operations ops = {
+	.read_resources		= pnp_read_resources,
+	.set_resources		= pnp_set_resources,
+	.enable_resources	= pnp_enable_resources,
+	.enable			= pnp_alt_enable,
+	.init			= f81803a_init,
+	.ops_pnp_mode		= &pnp_conf_mode_8787_aa,
+};
+
+static struct pnp_info pnp_dev_info[] = {
+	{ &ops, F81803A_SP1,  PNP_IO0 | PNP_IRQ0, 0x7f8, },
+	{ &ops, F81803A_SP2,  PNP_IO0 | PNP_IRQ0, 0x7f8, },
+	{ &ops, F81803A_HWM,  PNP_IO0 | PNP_IRQ0, 0xff8, },
+	{ &ops, F81803A_KBC,  PNP_IO0 | PNP_IRQ0 | PNP_IRQ1, 0x07f8, },
+	{ &ops, F81803A_GPIO, PNP_IO0 | PNP_IRQ0, 0x7f8, },
+	{ &ops, F81803A_WDT,  PNP_IO0, 0x7f8 },
+	{ &ops, F81803A_PME, },
+};
+
+static void enable_dev(struct device *dev)
+{
+	pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
+}
+
+struct chip_operations superio_fintek_f81803a_ops = {
+	CHIP_NAME("Fintek F81803A Super I/O")
+	.enable_dev = enable_dev
+};