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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <types.h>
#include <console/console.h>
#include <device/device.h>
#include <option.h>
#include <superio/hwm5_conf.h>
#include <superio/nuvoton/common/hwm.h>
#include "superio_hwm.h"
/* Hardware Monitor */
#define FAN_CRUISE_CONTROL_DISABLED 0
#define FAN_CRUISE_CONTROL_SPEED 1
#define FAN_CRUISE_CONTROL_THERMAL 2
#define FAN_SPEED_5625 0
//#define FAN_TEMPERATURE_30DEGC 0
#define HWM_BASE 0x290
struct fan_speed {
u8 fan_in;
u16 fan_speed;
};
// FANIN Target Speed Register
// FANIN = 337500 / RPM
struct fan_speed fan_speeds[] = {
{ 0x3c, 5625 }, { 0x41, 5192 }, { 0x47, 4753 }, { 0x4e, 4326 },
{ 0x56, 3924 }, { 0x5f, 3552 }, { 0x69, 3214 }, { 0x74, 2909 },
{ 0x80, 2636 }, { 0x8d, 2393 }, { 0x9b, 2177 }, { 0xaa, 1985 },
{ 0xba, 1814 }, { 0xcb, 1662 }, { 0xdd, 1527 }, { 0xf0, 1406 }
};
struct temperature {
u8 deg_celsius;
u8 deg_fahrenheit;
};
struct temperature temperatures[] = {
{ 30, 86 }, { 33, 91 }, { 36, 96 }, { 39, 102 },
{ 42, 107 }, { 45, 113 }, { 48, 118 }, { 51, 123 },
{ 54, 129 }, { 57, 134 }, { 60, 140 }, { 63, 145 },
{ 66, 150 }, { 69, 156 }, { 72, 161 }, { 75, 167 }
};
void hwm_setup(void)
{
int cpufan_control = 0, sysfan_control = 0;
int cpufan_speed = 0, sysfan_speed = 0;
int cpufan_temperature = 0, sysfan_temperature = 0;
cpufan_control = FAN_CRUISE_CONTROL_DISABLED;
get_option(&cpufan_control, "cpufan_cruise_control");
cpufan_speed = FAN_SPEED_5625;
get_option(&cpufan_speed, "cpufan_speed");
//cpufan_temperature = FAN_TEMPERATURE_30DEGC;
//get_option(&cpufan_temperature, "cpufan_temperature");
sysfan_control = FAN_CRUISE_CONTROL_DISABLED;
get_option(&sysfan_control, "sysfan_cruise_control");
sysfan_speed = FAN_SPEED_5625;
get_option(&sysfan_speed, "sysfan_speed");
//sysfan_temperature = FAN_TEMPERATURE_30DEGC;
//get_option(&sysfan_temperature, "sysfan_temperature");
// pnp_write_hwm5_index(HWM_BASE, 0x31, 0x20); // AVCC high limit
// pnp_write_hwm5_index(HWM_BASE, 0x34, 0x06); // VIN2 low limit
nuvoton_hwm_select_bank(HWM_BASE, 0);
pnp_write_hwm5_index(HWM_BASE, 0x59, 0x20); // Diode Selection
pnp_write_hwm5_index(HWM_BASE, 0x5d, 0x0f); // All Sensors Diode, not Thermistor
nuvoton_hwm_select_bank(HWM_BASE, 4);
pnp_write_hwm5_index(HWM_BASE, 0x54, 0xf1); // SYSTIN temperature offset
pnp_write_hwm5_index(HWM_BASE, 0x55, 0x19); // CPUTIN temperature offset
pnp_write_hwm5_index(HWM_BASE, 0x56, 0xfc); // AUXTIN temperature offset
nuvoton_hwm_select_bank(HWM_BASE, 0x80); // Default
u8 fan_config = 0;
// 00 FANOUT is Manual Mode
// 01 FANOUT is Thermal Cruise Mode
// 10 FANOUT is Fan Speed Cruise Mode
switch (cpufan_control) {
case FAN_CRUISE_CONTROL_SPEED: fan_config |= (2 << 4); break;
case FAN_CRUISE_CONTROL_THERMAL: fan_config |= (1 << 4); break;
}
switch (sysfan_control) {
case FAN_CRUISE_CONTROL_SPEED: fan_config |= (2 << 2); break;
case FAN_CRUISE_CONTROL_THERMAL: fan_config |= (1 << 2); break;
}
// This register must be written first
pnp_write_hwm5_index(HWM_BASE, 0x04, fan_config);
switch (cpufan_control) {
case FAN_CRUISE_CONTROL_SPEED: /* CPUFANIN target speed */
printk(BIOS_DEBUG, "Fan Cruise Control setting CPU fan to %d RPM\n",
fan_speeds[cpufan_speed].fan_speed);
pnp_write_hwm5_index(HWM_BASE, 0x06, fan_speeds[cpufan_speed].fan_in);
break;
case FAN_CRUISE_CONTROL_THERMAL: /* CPUFANIN target temperature */
printk(BIOS_DEBUG, "Fan Cruise Control setting CPU fan to activation at %d deg C/%d deg F\n",
temperatures[cpufan_temperature].deg_celsius,
temperatures[cpufan_temperature].deg_fahrenheit);
pnp_write_hwm5_index(HWM_BASE, 0x06,
temperatures[cpufan_temperature].deg_celsius);
break;
}
switch (sysfan_control) {
case FAN_CRUISE_CONTROL_SPEED: /* SYSFANIN target speed */
printk(BIOS_DEBUG, "Fan Cruise Control setting system fan to %d RPM\n",
fan_speeds[sysfan_speed].fan_speed);
pnp_write_hwm5_index(HWM_BASE, 0x05, fan_speeds[sysfan_speed].fan_in);
break;
case FAN_CRUISE_CONTROL_THERMAL: /* SYSFANIN target temperature */
printk(BIOS_DEBUG, "Fan Cruise Control setting system fan to activation at %d deg C/%d deg F\n",
temperatures[sysfan_temperature].deg_celsius,
temperatures[sysfan_temperature].deg_fahrenheit);
pnp_write_hwm5_index(HWM_BASE,
0x05, temperatures[sysfan_temperature].deg_celsius);
break;
}
pnp_write_hwm5_index(HWM_BASE, 0x0e, 0x02); // Fan Output Step Down Time
pnp_write_hwm5_index(HWM_BASE, 0x0f, 0x02); // Fan Output Step Up Time
pnp_write_hwm5_index(HWM_BASE, 0x47, 0xaf); // FAN divisor register
pnp_write_hwm5_index(HWM_BASE, 0x4b, 0x84); // AUXFANIN speed divisor
pnp_write_hwm5_index(HWM_BASE, 0x40, 0x01); // Init, but no SMI#
}
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