| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
| * Copyright (C) 2016 secunet Security Networks AG |
| * |
| * 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 <stdlib.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <delay.h> |
| |
| #include "env_ctrl.h" |
| #include "env_ctrl_chip.h" |
| |
| static inline u8 ite_ec_read(const u16 base, const u8 addr) |
| { |
| outb(addr, base + 5); |
| return inb(base + 6); |
| } |
| |
| static inline void ite_ec_write(const u16 base, const u8 addr, const u8 value) |
| { |
| outb(addr, base + 5); |
| outb(value, base + 6); |
| } |
| |
| static void extemp_force_idle_status(const u16 base) |
| { |
| u8 reg; |
| int retries = 10; |
| |
| /* Wait up to 10ms for non-busy state. */ |
| while (retries > 0) { |
| reg = ite_ec_read(base, ITE_EC_EXTEMP_STATUS); |
| |
| if ((reg & ITE_EC_EXTEMP_STATUS_HOST_BUSY) == 0x0) |
| break; |
| |
| retries--; |
| |
| mdelay(1); |
| } |
| |
| if (retries == 0 && (reg & ITE_EC_EXTEMP_STATUS_HOST_BUSY) == 0x1) { |
| /* |
| * SIO is busy due to unfinished peci transaction. |
| * Re-configure Register 0x8E to terminate processes. |
| */ |
| ite_ec_write(base, ITE_EC_EXTEMP_CONTROL, |
| ITE_EC_EXTEMP_CTRL_AUTO_4HZ | |
| ITE_EC_EXTEMP_CTRL_AUTO_START); |
| } |
| } |
| |
| /* |
| * Setup PECI interface |
| */ |
| static void enable_peci(const u16 base) |
| { |
| /* Enable PECI interface */ |
| ite_ec_write(base, ITE_EC_INTERFACE_SELECT, |
| ITE_EC_INTERFACE_SEL_PECI | |
| ITE_EC_INTERFACE_SPEED_TOLERANCE); |
| |
| /* Setup External Temperature using PECI GetTemp */ |
| ite_ec_write(base, ITE_EC_EXTEMP_ADDRESS, |
| PECI_CLIENT_ADDRESS); |
| ite_ec_write(base, ITE_EC_EXTEMP_COMMAND, |
| PECI_GETTEMP_COMMAND); |
| ite_ec_write(base, ITE_EC_EXTEMP_WRITE_LENGTH, |
| PECI_GETTEMP_WRITE_LENGTH); |
| ite_ec_write(base, ITE_EC_EXTEMP_READ_LENGTH, |
| PECI_GETTEMP_READ_LENGTH); |
| ite_ec_write(base, ITE_EC_EXTEMP_CONTROL, |
| ITE_EC_EXTEMP_CTRL_AUTO_4HZ | |
| ITE_EC_EXTEMP_CTRL_AUTO_START); |
| } |
| |
| /* |
| * Set up External Temperature to read via PECI or thermal diode/resistor |
| * into TMPINx register |
| */ |
| static void enable_tmpin(const u16 base, const u8 tmpin, |
| const struct ite_ec_thermal_config *const conf) |
| { |
| u8 reg; |
| |
| reg = ite_ec_read(base, ITE_EC_ADC_TEMP_CHANNEL_ENABLE); |
| |
| switch (conf->mode) { |
| case THERMAL_PECI: |
| if (reg & ITE_EC_ADC_TEMP_EXT_REPORTS_TO_MASK) { |
| printk(BIOS_WARNING, "PECI specified for multiple TMPIN\n"); |
| return; |
| } |
| enable_peci(base); |
| reg |= ITE_EC_ADC_TEMP_EXT_REPORTS_TO(tmpin); |
| break; |
| case THERMAL_DIODE: |
| reg |= ITE_EC_ADC_TEMP_DIODE_MODE(tmpin); |
| break; |
| case THERMAL_RESISTOR: |
| reg |= ITE_EC_ADC_TEMP_RESISTOR_MODE(tmpin); |
| break; |
| default: |
| printk(BIOS_WARNING, |
| "Unsupported thermal mode 0x%x on TMPIN%d\n", |
| conf->mode, tmpin); |
| return; |
| } |
| |
| ite_ec_write(base, ITE_EC_ADC_TEMP_CHANNEL_ENABLE, reg); |
| |
| /* Set temperature offsets */ |
| if (conf->mode != THERMAL_RESISTOR) { |
| reg = ite_ec_read(base, ITE_EC_BEEP_ENABLE); |
| reg |= ITE_EC_TEMP_ADJUST_WRITE_ENABLE; |
| ite_ec_write(base, ITE_EC_BEEP_ENABLE, reg); |
| ite_ec_write(base, ITE_EC_TEMP_ADJUST[tmpin-1], conf->offset); |
| } |
| |
| /* Set temperature limits */ |
| u8 max = conf->max; |
| ite_ec_write(base, ITE_EC_HIGH_TEMP_LIMIT(tmpin), |
| max ? max : 127); |
| ite_ec_write(base, ITE_EC_LOW_TEMP_LIMIT(tmpin), conf->min); |
| |
| /* Enable the startup of monitoring operation */ |
| reg = ite_ec_read(base, ITE_EC_CONFIGURATION); |
| reg |= ITE_EC_CONFIGURATION_START; |
| ite_ec_write(base, ITE_EC_CONFIGURATION, reg); |
| } |
| |
| static void fan_smartconfig(const u16 base, const u8 fan, |
| const enum ite_ec_fan_mode mode, |
| const struct ite_ec_fan_smartconfig *const conf) |
| { |
| u8 pwm_ctrl; |
| u8 pwm_start = 0; |
| u8 pwm_auto = 0; |
| |
| if (mode == FAN_SMART_SOFTWARE) { |
| pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_SOFTWARE; |
| |
| /* 50% duty cycle by default */ |
| const u8 duty = conf->pwm_start ? conf->pwm_start : 50; |
| if (IS_ENABLED(CONFIG_SUPERIO_ITE_ENV_CTRL_8BIT_PWM)) |
| pwm_start = ITE_EC_FAN_CTL_PWM_DUTY(duty); |
| else |
| pwm_ctrl |= ITE_EC_FAN_CTL_PWM_DUTY(duty); |
| } else { |
| pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_AUTOMATIC; |
| pwm_ctrl |= ITE_EC_FAN_CTL_TEMPIN(conf->tmpin); |
| |
| pwm_start = ITE_EC_FAN_CTL_PWM_START_DUTY(conf->pwm_start); |
| pwm_start |= ITE_EC_FAN_CTL_PWM_SLOPE_BIT6(conf->slope); |
| |
| pwm_auto = ITE_EC_FAN_CTL_PWM_SLOPE_LOWER(conf->slope); |
| if (conf->smoothing) |
| pwm_auto |= ITE_EC_FAN_CTL_AUTO_SMOOTHING_EN; |
| |
| ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_OFF(fan), |
| conf->tmp_off); |
| ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_START(fan), |
| conf->tmp_start); |
| /* Full speed above 127°C by default */ |
| ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_FULL(fan), |
| conf->tmp_full ? conf->tmp_full : 127); |
| ite_ec_write(base, ITE_EC_FAN_CTL_DELTA_TEMP(fan), |
| ITE_EC_FAN_CTL_DELTA_TEMP_INTRVL(conf->tmp_delta)); |
| } |
| |
| ite_ec_write(base, ITE_EC_FAN_CTL_PWM_CONTROL(fan), pwm_ctrl); |
| ite_ec_write(base, ITE_EC_FAN_CTL_PWM_START(fan), pwm_start); |
| ite_ec_write(base, ITE_EC_FAN_CTL_PWM_AUTO(fan), pwm_auto); |
| } |
| |
| static void enable_fan(const u16 base, const u8 fan, |
| const struct ite_ec_fan_config *const conf) |
| { |
| u8 reg; |
| |
| if (conf->mode == FAN_IGNORE) |
| return; |
| |
| /* FAN_CTL2 might have its own frequency setting */ |
| if (IS_ENABLED(CONFIG_SUPERIO_ITE_ENV_CTRL_PWM_FREQ2) && fan == 2) { |
| reg = ite_ec_read(base, ITE_EC_ADC_TEMP_EXTRA_CHANNEL_ENABLE); |
| reg &= ~ITE_EC_FAN_PWM_CLOCK_MASK; |
| reg |= ITE_EC_FAN_PWM_DEFAULT_CLOCK; |
| ite_ec_write(base, ITE_EC_ADC_TEMP_EXTRA_CHANNEL_ENABLE, reg); |
| } |
| |
| if (conf->mode >= FAN_SMART_SOFTWARE) { |
| fan_smartconfig(base, fan, conf->mode, &conf->smart); |
| } else { |
| reg = ite_ec_read(base, ITE_EC_FAN_CTL_MODE); |
| if (conf->mode == FAN_MODE_ON) |
| reg |= ITE_EC_FAN_CTL_ON(fan); |
| else |
| reg &= ~ITE_EC_FAN_CTL_ON(fan); |
| ite_ec_write(base, ITE_EC_FAN_CTL_MODE, reg); |
| } |
| |
| if (IS_ENABLED(SUPERIO_ITE_ENV_CTRL_FAN16_CONFIG) |
| && conf->mode >= FAN_MODE_ON) { |
| reg = ite_ec_read(base, ITE_EC_FAN_TAC_COUNTER_ENABLE); |
| reg |= ITE_EC_FAN_TAC_16BIT_ENABLE(fan); |
| ite_ec_write(base, ITE_EC_FAN_TAC_COUNTER_ENABLE, reg); |
| } |
| |
| reg = ite_ec_read(base, ITE_EC_FAN_MAIN_CTL); |
| if (conf->mode >= FAN_MODE_ON) |
| reg |= ITE_EC_FAN_MAIN_CTL_TAC_EN(fan); |
| else |
| reg &= ~ITE_EC_FAN_MAIN_CTL_TAC_EN(fan); |
| if (conf->mode >= FAN_SMART_SOFTWARE) |
| reg |= ITE_EC_FAN_MAIN_CTL_SMART(fan); |
| else |
| reg &= ~ITE_EC_FAN_MAIN_CTL_SMART(fan); |
| ite_ec_write(base, ITE_EC_FAN_MAIN_CTL, reg); |
| } |
| |
| void ite_ec_init(const u16 base, const struct ite_ec_config *const conf) |
| { |
| size_t i; |
| |
| /* Configure 23.43kHz PWM active high output */ |
| u8 fan_ctl = ite_ec_read(base, ITE_EC_FAN_CTL_MODE); |
| fan_ctl &= ~ITE_EC_FAN_PWM_CLOCK_MASK; |
| fan_ctl |= ITE_EC_FAN_PWM_DEFAULT_CLOCK; |
| fan_ctl |= ITE_EC_FAN_CTL_POLARITY_HIGH; |
| ite_ec_write(base, ITE_EC_FAN_CTL_MODE, fan_ctl); |
| |
| /* Enable HWM if configured */ |
| for (i = 0; i < ITE_EC_TMPIN_CNT; ++i) |
| enable_tmpin(base, i + 1, &conf->tmpin[i]); |
| |
| /* Enable reading of voltage pins */ |
| ite_ec_write(base, ITE_EC_ADC_VOLTAGE_CHANNEL_ENABLE, conf->vin_mask); |
| |
| /* Enable FANx if configured */ |
| for (i = 0; i < ITE_EC_FAN_CNT; ++i) |
| enable_fan(base, i + 1, &conf->fan[i]); |
| |
| /* |
| * System may get wrong temperature data when SIO is in |
| * busy state. Therefore, check the status and terminate |
| * processes if needed. |
| */ |
| for (i = 0; i < ITE_EC_TMPIN_CNT; ++i) |
| if (conf->tmpin[i].mode == THERMAL_PECI) |
| extemp_force_idle_status(base); |
| } |