Nico Huber | e34e178 | 2016-09-29 12:33:01 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
| 5 | * Copyright (C) 2016 secunet Security Networks AG |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | */ |
| 17 | |
| 18 | #include <stdlib.h> |
| 19 | #include <arch/io.h> |
| 20 | #include <console/console.h> |
| 21 | #include <delay.h> |
| 22 | |
| 23 | #include "env_ctrl.h" |
| 24 | #include "env_ctrl_chip.h" |
| 25 | |
| 26 | static inline u8 ite_ec_read(const u16 base, const u8 addr) |
| 27 | { |
| 28 | outb(addr, base + 5); |
| 29 | return inb(base + 6); |
| 30 | } |
| 31 | |
| 32 | static inline void ite_ec_write(const u16 base, const u8 addr, const u8 value) |
| 33 | { |
| 34 | outb(addr, base + 5); |
| 35 | outb(value, base + 6); |
| 36 | } |
| 37 | |
| 38 | static void extemp_force_idle_status(const u16 base) |
| 39 | { |
| 40 | u8 reg; |
| 41 | int retries = 10; |
| 42 | |
| 43 | /* Wait up to 10ms for non-busy state. */ |
| 44 | while (retries > 0) { |
| 45 | reg = ite_ec_read(base, ITE_EC_EXTEMP_STATUS); |
| 46 | |
| 47 | if ((reg & ITE_EC_EXTEMP_STATUS_HOST_BUSY) == 0x0) |
| 48 | break; |
| 49 | |
| 50 | retries--; |
| 51 | |
| 52 | mdelay(1); |
| 53 | } |
| 54 | |
| 55 | if (retries == 0 && (reg & ITE_EC_EXTEMP_STATUS_HOST_BUSY) == 0x1) { |
| 56 | /* |
| 57 | * SIO is busy due to unfinished peci transaction. |
| 58 | * Re-configure Register 0x8E to terminate processes. |
| 59 | */ |
| 60 | ite_ec_write(base, ITE_EC_EXTEMP_CONTROL, |
| 61 | ITE_EC_EXTEMP_CTRL_AUTO_4HZ | |
| 62 | ITE_EC_EXTEMP_CTRL_AUTO_START); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * Setup External Temperature to read via PECI into TMPINx register |
| 68 | */ |
| 69 | static void enable_peci(const u16 base, const u8 tmpin) |
| 70 | { |
| 71 | if (tmpin == 0 || tmpin > ITE_EC_TMPIN_CNT) |
| 72 | return; |
| 73 | |
| 74 | /* Enable PECI interface */ |
| 75 | ite_ec_write(base, ITE_EC_INTERFACE_SELECT, |
| 76 | ITE_EC_INTERFACE_SEL_PECI | |
| 77 | ITE_EC_INTERFACE_SPEED_TOLERANCE); |
| 78 | |
| 79 | /* Setup External Temperature using PECI GetTemp */ |
| 80 | ite_ec_write(base, ITE_EC_EXTEMP_ADDRESS, |
| 81 | PECI_CLIENT_ADDRESS); |
| 82 | ite_ec_write(base, ITE_EC_EXTEMP_COMMAND, |
| 83 | PECI_GETTEMP_COMMAND); |
| 84 | ite_ec_write(base, ITE_EC_EXTEMP_WRITE_LENGTH, |
| 85 | PECI_GETTEMP_WRITE_LENGTH); |
| 86 | ite_ec_write(base, ITE_EC_EXTEMP_READ_LENGTH, |
| 87 | PECI_GETTEMP_READ_LENGTH); |
| 88 | ite_ec_write(base, ITE_EC_EXTEMP_CONTROL, |
| 89 | ITE_EC_EXTEMP_CTRL_AUTO_4HZ | |
| 90 | ITE_EC_EXTEMP_CTRL_AUTO_START); |
| 91 | |
| 92 | /* External Temperature reported in TMPINx register */ |
| 93 | ite_ec_write(base, ITE_EC_ADC_TEMP_CHANNEL_ENABLE, |
| 94 | (tmpin & 3) << 6); |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Set up External Temperature to read via thermal diode/resistor |
| 99 | * into TMPINx register |
| 100 | */ |
| 101 | static void enable_tmpin(const u16 base, const int tmpin, |
| 102 | const enum ite_ec_thermal_mode mode) |
| 103 | { |
| 104 | u8 reg; |
| 105 | |
| 106 | reg = ite_ec_read(base, ITE_EC_ADC_TEMP_CHANNEL_ENABLE); |
| 107 | |
| 108 | switch (mode) { |
| 109 | case THERMAL_DIODE: |
| 110 | reg |= ITE_EC_ADC_TEMP_DIODE_MODE(tmpin); |
| 111 | break; |
| 112 | case THERMAL_RESISTOR: |
| 113 | reg |= ITE_EC_ADC_TEMP_RESISTOR_MODE(tmpin); |
| 114 | break; |
| 115 | default: |
| 116 | printk(BIOS_WARNING, |
| 117 | "Unsupported thermal mode 0x%x on TMPIN%d\n", |
| 118 | mode, tmpin); |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | ite_ec_write(base, ITE_EC_ADC_TEMP_CHANNEL_ENABLE, reg); |
| 123 | |
| 124 | /* Enable the startup of monitoring operation */ |
| 125 | reg = ite_ec_read(base, ITE_EC_CONFIGURATION); |
| 126 | reg |= ITE_EC_CONFIGURATION_START; |
| 127 | ite_ec_write(base, ITE_EC_CONFIGURATION, reg); |
| 128 | } |
| 129 | |
| 130 | static void fan_smartconfig(const u16 base, const u8 fan, |
| 131 | const enum ite_ec_fan_mode mode, |
| 132 | const struct ite_ec_fan_smartconfig *const conf) |
| 133 | { |
| 134 | u8 pwm_ctrl; |
| 135 | u8 pwm_start = 0; |
| 136 | u8 pwm_auto = 0; |
| 137 | |
| 138 | if (mode == FAN_SMART_SOFTWARE) { |
| 139 | pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_SOFTWARE; |
| 140 | |
| 141 | /* 50% duty cycle by default */ |
| 142 | const u8 duty = conf->pwm_start ? conf->pwm_start : 50; |
| 143 | if (IS_ENABLED(CONFIG_SUPERIO_ITE_ENV_CTRL_8BIT_PWM)) |
| 144 | pwm_start = ITE_EC_FAN_CTL_PWM_DUTY(duty); |
| 145 | else |
| 146 | pwm_ctrl |= ITE_EC_FAN_CTL_PWM_DUTY(duty); |
| 147 | } else { |
| 148 | pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_AUTOMATIC; |
| 149 | pwm_ctrl |= ITE_EC_FAN_CTL_TEMPIN(conf->tmpin); |
| 150 | |
| 151 | pwm_start = ITE_EC_FAN_CTL_PWM_START_DUTY(conf->pwm_start); |
| 152 | pwm_start |= ITE_EC_FAN_CTL_PWM_SLOPE_BIT6(conf->slope); |
| 153 | |
| 154 | pwm_auto = ITE_EC_FAN_CTL_PWM_SLOPE_LOWER(conf->slope); |
Arthur Heymans | e68947d | 2016-11-26 14:43:18 +0100 | [diff] [blame] | 155 | if (conf->smoothing) |
| 156 | pwm_auto |= ITE_EC_FAN_CTL_AUTO_SMOOTHING_EN; |
Nico Huber | e34e178 | 2016-09-29 12:33:01 +0200 | [diff] [blame] | 157 | |
| 158 | ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_OFF(fan), |
| 159 | conf->tmp_off); |
| 160 | ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_START(fan), |
| 161 | conf->tmp_start); |
| 162 | /* Full speed above 127°C by default */ |
| 163 | ite_ec_write(base, ITE_EC_FAN_CTL_TEMP_LIMIT_FULL(fan), |
| 164 | conf->tmp_full ? conf->tmp_full : 127); |
| 165 | ite_ec_write(base, ITE_EC_FAN_CTL_DELTA_TEMP(fan), |
| 166 | ITE_EC_FAN_CTL_DELTA_TEMP_INTRVL(conf->tmp_delta)); |
| 167 | } |
| 168 | |
| 169 | ite_ec_write(base, ITE_EC_FAN_CTL_PWM_CONTROL(fan), pwm_ctrl); |
| 170 | ite_ec_write(base, ITE_EC_FAN_CTL_PWM_START(fan), pwm_start); |
| 171 | ite_ec_write(base, ITE_EC_FAN_CTL_PWM_AUTO(fan), pwm_auto); |
| 172 | } |
| 173 | |
| 174 | static void enable_fan(const u16 base, const u8 fan, |
| 175 | const struct ite_ec_fan_config *const conf) |
| 176 | { |
| 177 | u8 reg; |
| 178 | |
| 179 | if (conf->mode == FAN_IGNORE) |
| 180 | return; |
| 181 | |
| 182 | /* FAN_CTL2 might have its own frequency setting */ |
| 183 | if (IS_ENABLED(CONFIG_SUPERIO_ITE_ENV_CTRL_PWM_FREQ2) && fan == 2) { |
| 184 | reg = ite_ec_read(base, ITE_EC_ADC_TEMP_EXTRA_CHANNEL_ENABLE); |
| 185 | reg &= ~ITE_EC_FAN_PWM_CLOCK_MASK; |
| 186 | reg |= ITE_EC_FAN_PWM_DEFAULT_CLOCK; |
| 187 | ite_ec_write(base, ITE_EC_ADC_TEMP_EXTRA_CHANNEL_ENABLE, reg); |
| 188 | } |
| 189 | |
| 190 | if (conf->mode >= FAN_SMART_SOFTWARE) { |
| 191 | fan_smartconfig(base, fan, conf->mode, &conf->smart); |
| 192 | } else { |
| 193 | reg = ite_ec_read(base, ITE_EC_FAN_CTL_MODE); |
| 194 | if (conf->mode == FAN_MODE_ON) |
| 195 | reg |= ITE_EC_FAN_CTL_ON(fan); |
| 196 | else |
| 197 | reg &= ~ITE_EC_FAN_CTL_ON(fan); |
| 198 | ite_ec_write(base, ITE_EC_FAN_CTL_MODE, reg); |
| 199 | } |
| 200 | |
| 201 | if (IS_ENABLED(SUPERIO_ITE_ENV_CTRL_FAN16_CONFIG) |
| 202 | && conf->mode >= FAN_MODE_ON) { |
| 203 | reg = ite_ec_read(base, ITE_EC_FAN_TAC_COUNTER_ENABLE); |
| 204 | reg |= ITE_EC_FAN_TAC_16BIT_ENABLE(fan); |
| 205 | ite_ec_write(base, ITE_EC_FAN_TAC_COUNTER_ENABLE, reg); |
| 206 | } |
| 207 | |
| 208 | reg = ite_ec_read(base, ITE_EC_FAN_MAIN_CTL); |
| 209 | if (conf->mode >= FAN_MODE_ON) |
| 210 | reg |= ITE_EC_FAN_MAIN_CTL_TAC_EN(fan); |
| 211 | else |
| 212 | reg &= ~ITE_EC_FAN_MAIN_CTL_TAC_EN(fan); |
| 213 | if (conf->mode >= FAN_SMART_SOFTWARE) |
| 214 | reg |= ITE_EC_FAN_MAIN_CTL_SMART(fan); |
| 215 | else |
| 216 | reg &= ~ITE_EC_FAN_MAIN_CTL_SMART(fan); |
| 217 | ite_ec_write(base, ITE_EC_FAN_MAIN_CTL, reg); |
| 218 | } |
| 219 | |
| 220 | void ite_ec_init(const u16 base, const struct ite_ec_config *const conf) |
| 221 | { |
| 222 | size_t i; |
| 223 | |
| 224 | /* Configure 23.43kHz PWM active high output */ |
| 225 | u8 fan_ctl = ite_ec_read(base, ITE_EC_FAN_CTL_MODE); |
| 226 | fan_ctl &= ~ITE_EC_FAN_PWM_CLOCK_MASK; |
| 227 | fan_ctl |= ITE_EC_FAN_PWM_DEFAULT_CLOCK; |
| 228 | fan_ctl |= ITE_EC_FAN_CTL_POLARITY_HIGH; |
| 229 | ite_ec_write(base, ITE_EC_FAN_CTL_MODE, fan_ctl); |
| 230 | |
| 231 | /* Enable PECI if configured */ |
| 232 | enable_peci(base, conf->peci_tmpin); |
| 233 | |
| 234 | /* Enable HWM if configured */ |
| 235 | for (i = 0; i < ITE_EC_TMPIN_CNT; ++i) |
| 236 | enable_tmpin(base, i + 1, conf->tmpin_mode[i]); |
| 237 | |
| 238 | /* Enable reading of voltage pins */ |
| 239 | ite_ec_write(base, ITE_EC_ADC_VOLTAGE_CHANNEL_ENABLE, conf->vin_mask); |
| 240 | |
| 241 | /* Enable FANx if configured */ |
| 242 | for (i = 0; i < ITE_EC_FAN_CNT; ++i) |
| 243 | enable_fan(base, i + 1, &conf->fan[i]); |
| 244 | |
| 245 | /* |
| 246 | * System may get wrong temperature data when SIO is in |
| 247 | * busy state. Therefore, check the status and terminate |
| 248 | * processes if needed. |
| 249 | */ |
| 250 | if (conf->peci_tmpin != 0) |
| 251 | extemp_force_idle_status(base); |
| 252 | } |