mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <string.h>
#include <types.h>
#include <device/device.h>
#include <console/console.h>
#include <drivers/intel/gma/int15.h>
#include <option.h>
#include <superio/hwm5_conf.h>
#include <superio/nuvoton/common/hwm.h>
 
/* Hardware Monitor */
 
static u16 hwm_base = 0xa00;
 
#define FAN_CRUISE_CONTROL_DISABLED     0
#define FAN_CRUISE_CONTROL_SPEED        1
#define FAN_CRUISE_CONTROL_THERMAL      2
#define FAN_SPEED_5625  0
 
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 }
};
 
static void hwm_setup(void)
{
        unsigned int cpufan_control = 0, sysfan_control = 0;
        unsigned int cpufan_speed = 0, sysfan_speed = 0;
        unsigned int cpufan_temperature = 0, sysfan_temperature = 0;
 
        cpufan_control = get_uint_option("cpufan_cruise_control", FAN_CRUISE_CONTROL_DISABLED);
        cpufan_speed = get_uint_option("cpufan_speed", FAN_SPEED_5625);
 
        sysfan_control = get_uint_option("sysfan_cruise_control", FAN_CRUISE_CONTROL_DISABLED);
        sysfan_speed = get_uint_option("sysfan_speed", FAN_SPEED_5625);
 
        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# */
}
 
/* mainboard_enable is executed as first thing after */
/* enumerate_buses(). */
 
static void mainboard_enable(struct device *dev)
{
        install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS, GMA_INT15_PANEL_FIT_DEFAULT, GMA_INT15_BOOT_DISPLAY_DEFAULT, 3);
        hwm_setup();
}
 
static void mainboard_init(void *chip_info)
{
        int i;
        struct device *dev;
 
        for (i = 1; i <= 3; i++) {
                char cmos_option_name[] = "ethernetx";
                snprintf(cmos_option_name, sizeof(cmos_option_name),
                         "ethernet%01d", i);
                unsigned int ethernet_disable = get_uint_option(cmos_option_name, 0);
                if (!ethernet_disable)
                        continue;
                printk(BIOS_DEBUG, "Disabling Ethernet NIC #%d\n", i);
                dev = pcidev_on_root(28, i - 1);
                if (dev == NULL) {
                        printk(BIOS_ERR,
                               "Disabling Ethernet NIC: Cannot find 00:1c.%d!\n",
                               i - 1);
                        continue;
                }
                dev->enabled = 0;
        }
}
 
struct chip_operations mainboard_ops = {
        .init = mainboard_init,
        .enable_dev = mainboard_enable,
};