drivers/i2c/nct7802y: Add new hardware-monitoring IC
Just another hardware-monitoring chip. Only limited fan control and PECI configuration is implemented. Change-Id: I35ea79e12941804e398c6304a08170a776f4ca76 Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/29475 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Nico Huber
Nico Huber
parent
9421727c70
commit
a3f643a3c0
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config DRIVERS_I2C_NCT7802Y
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bool
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help
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The NCT7802Y by Nuvoton is a Hardware Monitoring IC.
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ramstage-$(CONFIG_DRIVERS_I2C_NCT7802Y) += nct7802y.c
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ramstage-$(CONFIG_DRIVERS_I2C_NCT7802Y) += nct7802y_fan.c
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ramstage-$(CONFIG_DRIVERS_I2C_NCT7802Y) += nct7802y_peci.c
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@ -0,0 +1,96 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2017 secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef DRIVERS_I2C_NCT7802Y_CHIP_H
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#define DRIVERS_I2C_NCT7802Y_CHIP_H
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#include <stdint.h>
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#define NCT7802Y_PECI_CNT 2
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#define NCT7802Y_FAN_CNT 3
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enum nct7802y_peci_mode {
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PECI_DISABLED = 0,
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PECI_DOMAIN_0,
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PECI_DOMAIN_1,
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PECI_HIGHEST,
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};
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struct nct7802y_peci_config {
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enum nct7802y_peci_mode mode;
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u8 base_temp;
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};
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enum nct7802y_fan_mode {
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FAN_IGNORE = 0,
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FAN_MANUAL,
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FAN_SMART,
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};
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enum nct7802y_fan_smartmode {
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SMART_FAN_DUTY = 0, /* Target values given in duty cycle %. */
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SMART_FAN_RPM, /* Target valuse given in RPM. */
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};
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enum nct7802y_fan_speed {
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FAN_SPEED_NORMAL = 0, /* RPM values <= 12,750. */
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FAN_SPPED_HIGHSPEED, /* RPM values <= 25,500. */
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};
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enum nct7802y_fan_pecierror {
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PECI_ERROR_KEEP = 0, /* Keep current value. */
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PECI_ERROR_VALUE, /* Use `pecierror_minduty`. */
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PECI_ERROR_FULLSPEED, /* Run PWM at 100% duty cycle. */
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};
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enum nct7802y_temp_source {
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TEMP_SOURCE_REMOTE_1 = 0,
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TEMP_SOURCE_REMOTE_2,
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TEMP_SOURCE_REMOTE_3,
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TEMP_SOURCE_LOCAL,
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TEMP_SOURCE_PECI_0,
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TEMP_SOURCE_PECI_1,
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TEMP_SOURCE_PROGRAMMABLE_0,
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TEMP_SOURCE_PROGRAMMABLE_1,
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};
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struct nct7802y_fan_smartconfig {
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enum nct7802y_fan_smartmode mode;
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enum nct7802y_fan_speed speed;
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enum nct7802y_temp_source tempsrc;
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struct {
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u8 temp;
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u16 target;
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} table[4];
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u8 critical_temp;
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};
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struct nct7802y_fan_config {
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enum nct7802y_fan_mode mode;
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union {
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u8 duty_cycle;
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struct nct7802y_fan_smartconfig smart;
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};
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};
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/* Implements only those parts currently used by coreboot mainboards. */
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struct drivers_i2c_nct7802y_config {
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struct nct7802y_peci_config peci[NCT7802Y_PECI_CNT];
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struct nct7802y_fan_config fan[NCT7802Y_FAN_CNT];
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enum nct7802y_fan_pecierror on_pecierror;
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u8 pecierror_minduty;
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};
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#endif /* DRIVERS_I2C_NCT7802Y_CHIP_H */
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2017 secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <console/console.h>
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#include <device/device.h>
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#include "nct7802y.h"
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#include "chip.h"
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static void nct7802y_init(struct device *const dev)
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{
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if (!dev->chip_info) {
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printk(BIOS_WARNING,
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"NCT7802Y driver selected but not configured.");
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return;
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}
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nct7802y_init_peci(dev);
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nct7802y_init_fan(dev);
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}
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static struct device_operations nct7802y_ops = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.init = nct7802y_init,
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};
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static void nct7802y_enable(struct device *const dev)
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{
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dev->ops = &nct7802y_ops;
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}
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struct chip_operations drivers_i2c_nct7802y_ops = {
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CHIP_NAME("NCT7802Y")
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.enable_dev = nct7802y_enable
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};
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@ -0,0 +1,104 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2017 secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef DRIVERS_I2C_NCT7802Y_H
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#define DRIVERS_I2C_NCT7802Y_H
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#include <types.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/i2c_bus.h>
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#define BANK_SELECT 0x00
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/* Bank 0 */
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#define PECI_ENABLE 0x23
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#define PECI_ENABLE_AGENTx(x) (1 << (x))
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#define FAN_ENABLE 0x24
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#define FANx_ENABLE(fan) (1 << (fan))
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#define FAN_CTRL(fan) (0x60 + (fan))
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#define CLOSE_LOOP_FAN_RPM_CTRL 0x63
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#define CLOSE_LOOP_FANx_EN(fan) (1 << ((fan) + 5))
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#define CLOSE_LOOP_FANx_HIGH_RPM(fan) (1 << ((fan) + 2))
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#define CLOSE_LOOP_FAN_PECI_ERR_MASK (3 << 0)
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#define CLOSE_LOOP_FAN_PECI_ERR_CURR (0 << 0)
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#define CLOSE_LOOP_FAN_PECI_ERR_VALUE (1 << 0)
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#define CLOSE_LOOP_FAN_PECI_ERR_MAX (2 << 0)
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#define TEMP_SHIFT(temp) (((temp) % 2) * 4)
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#define TEMP_TO_FAN_MAP(temp) (0x64 + (temp) / 2)
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#define TEMPx_TO_FAN_MAP_MASK(temp) (7 << TEMP_SHIFT(temp))
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#define TEMPx_TO_FANy_MAP(temp, fan) (1 << (TEMP_SHIFT(temp) + (fan)))
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#define FAN_CTRL_TEMP_SRC(temp) (0x68 + (temp) / 2)
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#define FAN_CTRL_TEMPx_SRC_MASK(temp) (7 << TEMP_SHIFT(temp))
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#define FAN_CTRL_TEMPx_SRCy(temp, src) ((src) << TEMP_SHIFT(temp))
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#define FAN_DUTY_ON_PECI_ERROR 0x7a
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#define TABLEx_TEMP_POINTy(fan, pt) (0x80 + (0x10 * (fan)) + (pt))
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#define TABLEx_TARGET_POINTy(fan, pt) (0x85 + (0x10 * (fan)) + (pt))
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/* Bank 1 */
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#define PECI_CTRL_1 0x01
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#define PECI_CTRL_1_EN (1 << 7)
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#define PECI_CTRL_1_MANUAL_EN (1 << 1)
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#define PECI_CTRL_1_ROUTINE_EN (1 << 0)
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#define PECI_CTRL_3 0x03
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#define PECI_CTRL_3_EN_AGENTx(x) (1 << ((x) + 4))
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#define PECI_CTRL_3_HAS_DOM1_AGENTx(x) (1 << (x))
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#define PECI_REPORT_TEMP_STYLE 0x04
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#define PECI_TEMP_STYLE_DOM0_AGENTx(x) (0 << ((x) + 1))
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#define PECI_TEMP_STYLE_DOM1_AGENTx(x) (1 << ((x) + 1))
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#define PECI_TEMP_STYLE_SINGLE (0 << 0)
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#define PECI_TEMP_STYLE_HIGHEST (1 << 0)
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#define PECI_BASE_TEMP_AGENT(x) (0x09 + (x))
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#define PECI_BASE_TEMP_MAX (0x7f << 0)
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static inline int nct7802y_select_bank(struct device *const dev, const u8 bank)
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{
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const int ret = i2c_dev_writeb_at(dev, BANK_SELECT, bank);
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if (ret != CB_SUCCESS)
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printk(BIOS_NOTICE, "nct7802y: Select bank failed: %d\n", ret);
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return ret;
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}
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static inline int nct7802y_write(struct device *const dev,
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const u8 reg, const u8 value)
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{
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return i2c_dev_writeb_at(dev, reg, value);
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}
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static inline int nct7802y_update(struct device *const dev, const u8 reg,
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const u8 clear_mask, const u8 set_mask)
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{
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const int val = i2c_dev_readb_at(dev, reg);
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if (val < 0)
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return val;
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return i2c_dev_writeb_at(dev, reg, (val & ~clear_mask) | set_mask);
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}
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void nct7802y_init_fan(struct device *dev);
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void nct7802y_init_peci(struct device *dev);
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#endif /* DRIVERS_I2C_NCT7802Y_H */
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2017 secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <types.h>
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#include <device/device.h>
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#include "nct7802y.h"
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#include "chip.h"
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static void init_fan(struct device *const dev,
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const struct nct7802y_fan_config *const config,
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const unsigned int fan)
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{
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unsigned int temp;
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unsigned int i;
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nct7802y_update(dev, FAN_ENABLE, 0, FANx_ENABLE(fan));
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/* By default, do not map any temperature control to the fan. */
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for (temp = 0; temp < NCT7802Y_FAN_CNT; ++temp) {
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nct7802y_update(dev, TEMP_TO_FAN_MAP(temp),
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TEMPx_TO_FANy_MAP(temp, fan), 0);
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}
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if (config->mode == FAN_MANUAL) {
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nct7802y_write(dev, FAN_CTRL(fan), config->duty_cycle);
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} else {
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u8 set = 0, div, mul;
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if (config->smart.mode == SMART_FAN_RPM) {
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set |= CLOSE_LOOP_FANx_EN(fan);
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div = 50;
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if (config->smart.speed == FAN_SPPED_HIGHSPEED) {
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set |= CLOSE_LOOP_FANx_HIGH_RPM(fan);
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div = 100;
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}
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mul = 1;
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} else {
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/* SMART_FAN_DUTY is given in %, 100% == 255. */
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div = 100;
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mul = 255;
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}
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nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL,
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CLOSE_LOOP_FANx_EN(fan) |
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CLOSE_LOOP_FANx_HIGH_RPM(fan),
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set);
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/* Map TEMPx to FANx to make things simple */
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nct7802y_update(dev, TEMP_TO_FAN_MAP(fan),
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TEMPx_TO_FAN_MAP_MASK(fan),
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TEMPx_TO_FANy_MAP(fan, fan));
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nct7802y_update(dev, FAN_CTRL_TEMP_SRC(fan),
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FAN_CTRL_TEMPx_SRC_MASK(fan),
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FAN_CTRL_TEMPx_SRCy(
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fan, config->smart.tempsrc));
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for (i = 0; i < ARRAY_SIZE(config->smart.table); ++i) {
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nct7802y_write(dev, TABLEx_TEMP_POINTy(fan, i),
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config->smart.table[i].temp);
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nct7802y_write(dev, TABLEx_TARGET_POINTy(fan, i),
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(config->smart.table[i].target * mul) / div);
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}
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nct7802y_write(dev, TABLEx_TEMP_POINTy(fan, 4),
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config->smart.critical_temp);
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}
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}
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void nct7802y_init_fan(struct device *const dev)
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{
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const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
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unsigned int i;
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u8 set;
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if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
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return;
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for (i = 0; i < NCT7802Y_FAN_CNT; ++i) {
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if (config->fan[i].mode != FAN_IGNORE)
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init_fan(dev, &config->fan[i], i);
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}
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switch (config->on_pecierror) {
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case PECI_ERROR_KEEP:
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set = CLOSE_LOOP_FAN_PECI_ERR_CURR;
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break;
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case PECI_ERROR_VALUE:
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set = CLOSE_LOOP_FAN_PECI_ERR_VALUE;
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break;
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case PECI_ERROR_FULLSPEED:
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set = CLOSE_LOOP_FAN_PECI_ERR_MAX;
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break;
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default:
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set = 0;
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break;
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}
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nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL,
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CLOSE_LOOP_FAN_PECI_ERR_MASK, set);
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nct7802y_write(dev, FAN_DUTY_ON_PECI_ERROR, config->pecierror_minduty);
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}
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2017 secunet Security Networks AG
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*
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* 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.
|
||||
*
|
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* 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
|
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* GNU General Public License for more details.
|
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*/
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#include <types.h>
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#include <device/device.h>
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#include "nct7802y.h"
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#include "chip.h"
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void nct7802y_init_peci(struct device *const dev)
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{
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const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
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unsigned int i, all_off = 1;
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/* Bank 1 can only be written to if PECI reading is enabled */
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if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
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return;
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nct7802y_update(dev, PECI_ENABLE, 0, PECI_ENABLE_AGENTx(0));
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if (nct7802y_select_bank(dev, 1) != CB_SUCCESS)
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return;
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for (i = 0; i < NCT7802Y_PECI_CNT; ++i) {
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if (config->peci[i].mode != PECI_DISABLED) {
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u8 ctrl3 = 0, style = 0;
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switch (config->peci[i].mode) {
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case PECI_DOMAIN_0:
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ctrl3 = PECI_CTRL_3_EN_AGENTx(i);
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style = PECI_TEMP_STYLE_DOM0_AGENTx(i) |
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PECI_TEMP_STYLE_SINGLE;
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break;
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case PECI_DOMAIN_1:
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ctrl3 = PECI_CTRL_3_EN_AGENTx(i) |
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PECI_CTRL_3_HAS_DOM1_AGENTx(i);
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style = PECI_TEMP_STYLE_DOM1_AGENTx(i) |
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PECI_TEMP_STYLE_SINGLE;
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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);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue