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/*
* This file is part of the coreboot project.
*
* Copyright 2017 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; version 2 of the License.
*
* 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 <types.h>
#include <device/device.h>
#include "nct7802y.h"
#include "chip.h"
static void init_fan(struct device *const dev,
const struct nct7802y_fan_config *const config,
const unsigned int fan)
{
unsigned int temp;
unsigned int i;
nct7802y_update(dev, FAN_ENABLE, 0, FANx_ENABLE(fan));
/* By default, do not map any temperature control to the fan. */
for (temp = 0; temp < NCT7802Y_FAN_CNT; ++temp) {
nct7802y_update(dev, TEMP_TO_FAN_MAP(temp),
TEMPx_TO_FANy_MAP(temp, fan), 0);
}
if (config->mode == FAN_MANUAL) {
nct7802y_write(dev, FAN_CTRL(fan), config->duty_cycle);
} else {
u8 set = 0, div, mul;
if (config->smart.mode == SMART_FAN_RPM) {
set |= CLOSE_LOOP_FANx_EN(fan);
div = 50;
if (config->smart.speed == FAN_SPPED_HIGHSPEED) {
set |= CLOSE_LOOP_FANx_HIGH_RPM(fan);
div = 100;
}
mul = 1;
} else {
/* SMART_FAN_DUTY is given in %, 100% == 255. */
div = 100;
mul = 255;
}
nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL,
CLOSE_LOOP_FANx_EN(fan) |
CLOSE_LOOP_FANx_HIGH_RPM(fan),
set);
/* Map TEMPx to FANx to make things simple */
nct7802y_update(dev, TEMP_TO_FAN_MAP(fan),
TEMPx_TO_FAN_MAP_MASK(fan),
TEMPx_TO_FANy_MAP(fan, fan));
nct7802y_update(dev, FAN_CTRL_TEMP_SRC(fan),
FAN_CTRL_TEMPx_SRC_MASK(fan),
FAN_CTRL_TEMPx_SRCy(
fan, config->smart.tempsrc));
for (i = 0; i < ARRAY_SIZE(config->smart.table); ++i) {
nct7802y_write(dev, TABLEx_TEMP_POINTy(fan, i),
config->smart.table[i].temp);
nct7802y_write(dev, TABLEx_TARGET_POINTy(fan, i),
(config->smart.table[i].target * mul) / div);
}
nct7802y_write(dev, TABLEx_TEMP_POINTy(fan, 4),
config->smart.critical_temp);
}
}
void nct7802y_init_fan(struct device *const dev)
{
const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
unsigned int i;
u8 set;
if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
return;
for (i = 0; i < NCT7802Y_FAN_CNT; ++i) {
if (config->fan[i].mode != FAN_IGNORE)
init_fan(dev, &config->fan[i], i);
}
switch (config->on_pecierror) {
case PECI_ERROR_KEEP:
set = CLOSE_LOOP_FAN_PECI_ERR_CURR;
break;
case PECI_ERROR_VALUE:
set = CLOSE_LOOP_FAN_PECI_ERR_VALUE;
break;
case PECI_ERROR_FULLSPEED:
set = CLOSE_LOOP_FAN_PECI_ERR_MAX;
break;
default:
set = 0;
break;
}
nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL,
CLOSE_LOOP_FAN_PECI_ERR_MASK, set);
nct7802y_write(dev, FAN_DUTY_ON_PECI_ERROR, config->pecierror_minduty);
}
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