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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"
void nct7802y_init_peci(struct device *const dev)
{
const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
unsigned int i, all_off = 1;
/* Bank 1 can only be written to if PECI reading is enabled */
if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
return;
nct7802y_update(dev, PECI_ENABLE, 0, PECI_ENABLE_AGENTx(0));
if (nct7802y_select_bank(dev, 1) != CB_SUCCESS)
return;
for (i = 0; i < NCT7802Y_PECI_CNT; ++i) {
if (config->peci[i].mode != PECI_DISABLED) {
u8 ctrl3 = 0, style = 0;
switch (config->peci[i].mode) {
case PECI_DOMAIN_0:
ctrl3 = PECI_CTRL_3_EN_AGENTx(i);
style = PECI_TEMP_STYLE_DOM0_AGENTx(i) |
PECI_TEMP_STYLE_SINGLE;
break;
case PECI_DOMAIN_1:
ctrl3 = PECI_CTRL_3_EN_AGENTx(i) |
PECI_CTRL_3_HAS_DOM1_AGENTx(i);
style = PECI_TEMP_STYLE_DOM1_AGENTx(i) |
PECI_TEMP_STYLE_SINGLE;
break;
case PECI_HIGHEST:
ctrl3 = PECI_CTRL_3_EN_AGENTx(i) |
PECI_CTRL_3_HAS_DOM1_AGENTx(i);
style = PECI_TEMP_STYLE_HIGHEST;
break;
default:
break;
}
nct7802y_update(dev, PECI_CTRL_1,
PECI_CTRL_1_MANUAL_EN,
PECI_CTRL_1_EN |
PECI_CTRL_1_ROUTINE_EN);
nct7802y_update(dev, PECI_CTRL_3,
PECI_CTRL_3_HAS_DOM1_AGENTx(i), ctrl3);
nct7802y_update(dev, PECI_REPORT_TEMP_STYLE,
PECI_TEMP_STYLE_DOM1_AGENTx(i) |
PECI_TEMP_STYLE_HIGHEST,
style);
nct7802y_write(dev, PECI_BASE_TEMP_AGENT(i),
config->peci[i].base_temp);
all_off = 0;
} else {
nct7802y_update(dev, PECI_CTRL_3,
PECI_CTRL_3_EN_AGENTx(i), 0);
}
}
if (all_off)
nct7802y_update(dev, PECI_CTRL_1, PECI_CTRL_1_EN, 0);
/* Disable PECI #0 reading if we only enabled it to access bank 1 */
if (config->peci[0].mode == PECI_DISABLED) {
if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
return;
nct7802y_update(dev, PECI_ENABLE, PECI_ENABLE_AGENTx(0), 0);
}
}
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