| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pnp.h> |
| #include <ec/acpi/ec.h> |
| #include <option.h> |
| |
| #include "ec.h" |
| #include "chip.h" |
| |
| typedef struct ec_kontron_it8516e_config config_t; |
| |
| enum { /* EC commands */ |
| IT8516E_CMD_SET_SYSTEMP_TYPE = 0x06, |
| IT8516E_CMD_GET_SYSTEMP_TYPE = 0x07, |
| IT8516E_CMD_GET_FAN_MODE = 0x10, |
| IT8516E_CMD_SET_FAN_MODE = 0x11, |
| IT8516E_CMD_GET_FAN_PWM = 0x12, |
| IT8516E_CMD_SET_FAN_PWM = 0x13, |
| IT8516E_CMD_GET_FAN_SPEED = 0x14, |
| IT8516E_CMD_SET_FAN_SPEED = 0x15, |
| IT8516E_CMD_GET_FAN_TEMP = 0x16, |
| IT8516E_CMD_SET_FAN_TEMP = 0x17, |
| IT8516E_CMD_SET_FAN_LIMITS = 0x1a, |
| }; |
| |
| /** |
| * Sets the type of the external temperature sensor used |
| * |
| * @param type Type of sensor to set |
| */ |
| static void it8516e_set_systemp_type(const u8 type) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_SYSTEMP_TYPE)) |
| return; |
| send_ec_data(type); |
| } |
| |
| /** |
| * Sets the operating mode of a fan |
| * |
| * @param idx Selects the fan; 0: CPU, 1: System |
| * @param mode Mode to set |
| */ |
| static void it8516e_set_fan_mode(const u8 idx, const u8 mode) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_FAN_MODE)) |
| return; |
| if (send_ec_data(idx)) |
| return; |
| send_ec_data(mode); |
| } |
| |
| /** |
| * Sets the PWM rate of a fan in IT8516E_MODE_PWM |
| * |
| * @param idx Selects the fan; 0: CPU, 1: System |
| * @param pwm PWM rate measured in 255ths |
| */ |
| static void it8516e_set_fan_pwm(const u8 idx, const u8 pwm) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_FAN_PWM)) |
| return; |
| if (send_ec_data(idx)) |
| return; |
| send_ec_data(pwm); |
| } |
| |
| /** |
| * Sets the target speed in RPM for a fan in IT8516E_MODE_SPEED |
| * |
| * @param idx Selects the fan; 0: CPU, 1: System |
| * @param speed Speed in RPM |
| */ |
| static void it8516e_set_fan_speed(const u8 idx, const u16 speed) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_FAN_SPEED)) |
| return; |
| if (send_ec_data(idx)) |
| return; |
| if (send_ec_data(speed & 0xff)) |
| return; |
| send_ec_data(speed >> 8); |
| } |
| |
| /** |
| * Sets the target temperature for a fan in IT8516E_MODE_THERMAL |
| * |
| * @param idx Selects the fan; 0: CPU, 1: System |
| * @param temp Temperature in 64ths degree C |
| */ |
| static void it8516e_set_fan_temperature(const u8 idx, const u16 temp) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_FAN_TEMP)) |
| return; |
| if (send_ec_data(idx)) |
| return; |
| if (send_ec_data(temp & 0xff)) |
| return; |
| send_ec_data(temp >> 8); |
| } |
| |
| /** |
| * Sets the minimum and maximum PWM rate of a fan in IT8516E_MODE_THERMAL |
| * |
| * @param idx Selects the fan; 0: CPU, 1: System |
| * @param min Minimum PWM rate in % |
| * @param max Maximum PWM rate in % |
| */ |
| static void it8516e_set_fan_limits(const u8 idx, const u8 min, const u8 max) |
| { |
| if (send_ec_command(IT8516E_CMD_SET_FAN_LIMITS)) |
| return; |
| if (send_ec_data(idx)) |
| return; |
| if (send_ec_data(min)) |
| return; |
| send_ec_data(max); |
| } |
| |
| static void it8516e_set_fan_from_options(const config_t *const config, |
| const u8 fan_idx) |
| { |
| static char fanX_mode[] = "fanX_mode"; |
| static char fanX_target[] = "fanX_target"; |
| static char fanX_min[] = "fanX_min"; |
| static char fanX_max[] = "fanX_max"; |
| |
| u8 fan_mode = config->default_fan_mode[fan_idx]; |
| u16 fan_target = config->default_fan_target[fan_idx]; |
| u8 fan_min = config->default_fan_min[fan_idx]; |
| u8 fan_max = config->default_fan_max[fan_idx]; |
| |
| fanX_mode[3] = '1' + fan_idx; |
| get_option(&fan_mode, fanX_mode); |
| if (!fan_mode) |
| fan_mode = IT8516E_MODE_AUTO; |
| it8516e_set_fan_mode(fan_idx, fan_mode); |
| |
| fanX_target[3] = '1' + fan_idx; |
| get_option(&fan_target, fanX_target); |
| switch (fan_mode) { |
| case IT8516E_MODE_AUTO: |
| printk(BIOS_DEBUG, |
| "Setting it8516e fan%d " |
| "control to auto.\n", |
| fan_idx + 1); |
| break; |
| case IT8516E_MODE_PWM: |
| printk(BIOS_DEBUG, |
| "Setting it8516e fan%d " |
| "control to %d%% PWM.\n", |
| fan_idx + 1, fan_target); |
| if (fan_target > 100) /* Constrain to 100% */ |
| fan_target = 100; |
| it8516e_set_fan_pwm(fan_idx, (fan_target * 255) / 100); |
| break; |
| case IT8516E_MODE_SPEED: |
| printk(BIOS_DEBUG, |
| "Setting it8516e fan%d " |
| "control to %d RPMs.\n", |
| fan_idx + 1, fan_target); |
| it8516e_set_fan_speed(fan_idx, fan_target); |
| break; |
| case IT8516E_MODE_THERMAL: |
| printk(BIOS_DEBUG, |
| "Setting it8516e fan%d control to %d C.\n", |
| fan_idx + 1, fan_target); |
| if (fan_target > 1024) /* Constrain to 1K */ |
| fan_target = 1024; |
| it8516e_set_fan_temperature(fan_idx, fan_target * 64); |
| |
| fanX_min[3] = '1' + fan_idx; |
| fanX_max[3] = '1' + fan_idx; |
| get_option(&fan_min, fanX_min); |
| get_option(&fan_max, fanX_max); |
| |
| if (!fan_max || fan_max > 100) /* Constrain fan_max to 100% */ |
| fan_max = 100; |
| if (fan_min >= 100) /* Constrain fan_min to 99% */ |
| fan_min = 99; |
| if (fan_max <= fan_min) /* If fan_min is the higher of the two, |
| it's safer for the hardware to keep |
| its value. Therefore, update fan_max. */ |
| fan_max = fan_min + 1; |
| |
| printk(BIOS_DEBUG, |
| "Setting it8516e fan%d limits to %d%% - %d%% PWM.\n", |
| fan_idx + 1, fan_min, fan_max); |
| it8516e_set_fan_limits(fan_idx, fan_min, fan_max); |
| break; |
| } |
| } |
| |
| static void it8516e_pm2_init(struct device *dev) |
| { |
| const config_t *const config = dev->chip_info; |
| |
| /* TODO: Set frequency / divider? */ |
| |
| ec_set_ports(find_resource(dev, PNP_IDX_IO1)->base, |
| find_resource(dev, PNP_IDX_IO0)->base); |
| |
| u8 systemp_type = config->default_systemp; |
| get_option(&systemp_type, "systemp_type"); |
| if (systemp_type >= IT8516E_SYSTEMP_LASTPLUSONE) |
| systemp_type = IT8516E_SYSTEMP_NONE; |
| it8516e_set_systemp_type(systemp_type); |
| |
| it8516e_set_fan_from_options(config, 0); |
| it8516e_set_fan_from_options(config, 1); |
| } |
| |
| static struct device_operations it8516e_pm2_ops = { |
| .read_resources = pnp_read_resources, |
| .set_resources = pnp_set_resources, |
| .enable_resources = pnp_enable_resources, |
| .enable = pnp_enable, |
| .init = it8516e_pm2_init |
| }; |
| |
| static struct pnp_info it8516e_dev_infos[] = { |
| { NULL, IT8516E_LDN_UART1, PNP_IO0 | PNP_IRQ0, 0x07f8, }, |
| { NULL, IT8516E_LDN_UART2, PNP_IO0 | PNP_IRQ0, 0x07f8, }, |
| { NULL, IT8516E_LDN_SWUC, PNP_IO0 | PNP_IRQ0, 0xffe0, }, |
| { NULL, IT8516E_LDN_MOUSE, PNP_IRQ0, }, |
| { NULL, IT8516E_LDN_KBD, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, |
| { NULL, IT8516E_LDN_SMFI, PNP_IO0 | PNP_IRQ0, 0xfff0, }, |
| { NULL, IT8516E_LDN_BRAM, PNP_IO0 | PNP_IO1, 0xfffe, 0xfffe, }, |
| { NULL, IT8516E_LDN_PM1, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, |
| { &it8516e_pm2_ops, IT8516E_LDN_PM2, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, |
| { NULL, IT8516E_LDN_PM3, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07ff, 0x07ff, }, |
| }; |
| |
| static void it8516e_enable(struct device *dev) |
| { |
| pnp_enable_devices(dev, &pnp_ops, |
| ARRAY_SIZE(it8516e_dev_infos), it8516e_dev_infos); |
| } |
| |
| const struct chip_operations ec_kontron_it8516e_ops = { |
| CHIP_NAME("Kontron (Fintec/ITE) IT8516E EC") |
| .enable_dev = it8516e_enable |
| }; |