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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <stdlib.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
#include <ec/acpi/ec.h>
#include <pc80/mc146818rtc.h>
#include "ec.h"
#include "chip.h"
typedef struct ec_kontron_it8516e_config config_t;
enum { /* EC commands */
IT8516E_CMD_SET_SYSTEMP_TYPE = 0x06,
IT8516E_CMD_GET_SYSTEMP_TYPE = 0x07,
IT8516E_CMD_GET_FAN_MODE = 0x10,
IT8516E_CMD_SET_FAN_MODE = 0x11,
IT8516E_CMD_GET_FAN_PWM = 0x12,
IT8516E_CMD_SET_FAN_PWM = 0x13,
IT8516E_CMD_GET_FAN_SPEED = 0x14,
IT8516E_CMD_SET_FAN_SPEED = 0x15,
IT8516E_CMD_GET_FAN_TEMP = 0x16,
IT8516E_CMD_SET_FAN_TEMP = 0x17,
IT8516E_CMD_SET_FAN_LIMITS = 0x1a,
};
/**
* Sets the type of the external temperature sensor used
*
* @param type Type of sensor to set
*/
static void it8516e_set_systemp_type(const u8 type)
{
if (send_ec_command(IT8516E_CMD_SET_SYSTEMP_TYPE))
return;
send_ec_data(type);
}
/**
* Sets the operating mode of a fan
*
* @param idx Selects the fan; 0: CPU, 1: System
* @param mode Mode to set
*/
static void it8516e_set_fan_mode(const u8 idx, const u8 mode)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_MODE))
return;
if (send_ec_data(idx))
return;
send_ec_data(mode);
}
/**
* Sets the PWM rate of a fan in IT8516E_MODE_PWM
*
* @param idx Selects the fan; 0: CPU, 1: System
* @param pwm PWM rate measured in 255ths
*/
static void it8516e_set_fan_pwm(const u8 idx, const u8 pwm)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_PWM))
return;
if (send_ec_data(idx))
return;
send_ec_data(pwm);
}
/**
* Sets the target speed in RPM for a fan in IT8516E_MODE_SPEED
*
* @param idx Selects the fan; 0: CPU, 1: System
* @param speed Speed in RPM
*/
static void it8516e_set_fan_speed(const u8 idx, const u16 speed)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_SPEED))
return;
if (send_ec_data(idx))
return;
if (send_ec_data(speed & 0xff))
return;
send_ec_data(speed >> 8);
}
/**
* Sets the target temperature for a fan in IT8516E_MODE_THERMAL
*
* @param idx Selects the fan; 0: CPU, 1: System
* @param temp Temperature in 64ths degree C
*/
static void it8516e_set_fan_temperature(const u8 idx, const u16 temp)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_TEMP))
return;
if (send_ec_data(idx))
return;
if (send_ec_data(temp & 0xff))
return;
send_ec_data(temp >> 8);
}
/**
* Sets the minimum and maximum PWM rate of a fan in IT8516E_MODE_THERMAL
*
* @param idx Selects the fan; 0: CPU, 1: System
* @param min Minimum PWM rate in %
* @param max Maximum PWM rate in %
*/
static void it8516e_set_fan_limits(const u8 idx, const u8 min, const u8 max)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_LIMITS))
return;
if (send_ec_data(idx))
return;
if (send_ec_data(min))
return;
send_ec_data(max);
}
static void it8516e_set_fan_from_options(const config_t *const config,
const u8 fan_idx)
{
static char fanX_mode[] = "fanX_mode";
static char fanX_target[] = "fanX_target";
static char fanX_min[] = "fanX_min";
static char fanX_max[] = "fanX_max";
u8 fan_mode = config->default_fan_mode[fan_idx];
u16 fan_target = config->default_fan_target[fan_idx];
u8 fan_min = config->default_fan_min[fan_idx];
u8 fan_max = config->default_fan_max[fan_idx];
fanX_mode[3] = '1' + fan_idx;
get_option(&fan_mode, fanX_mode);
if (!fan_mode)
fan_mode = IT8516E_MODE_AUTO;
it8516e_set_fan_mode(fan_idx, fan_mode);
fanX_target[3] = '1' + fan_idx;
get_option(&fan_target, fanX_target);
switch (fan_mode) {
case IT8516E_MODE_AUTO:
printk(BIOS_DEBUG,
"Setting it8516e fan%d "
"control to auto.\n",
fan_idx + 1);
break;
case IT8516E_MODE_PWM:
printk(BIOS_DEBUG,
"Setting it8516e fan%d "
"control to %d%% PWM.\n",
fan_idx + 1, fan_target);
if (fan_target > 100) /* Constrain to 100% */
fan_target = 100;
it8516e_set_fan_pwm(fan_idx, (fan_target * 255) / 100);
break;
case IT8516E_MODE_SPEED:
printk(BIOS_DEBUG,
"Setting it8516e fan%d "
"control to %d RPMs.\n",
fan_idx + 1, fan_target);
it8516e_set_fan_speed(fan_idx, fan_target);
break;
case IT8516E_MODE_THERMAL:
printk(BIOS_DEBUG,
"Setting it8516e fan%d control to %d C.\n",
fan_idx + 1, fan_target);
if (fan_target > 1024) /* Constrain to 1K */
fan_target = 1024;
it8516e_set_fan_temperature(fan_idx, fan_target * 64);
fanX_min[3] = '1' + fan_idx;
fanX_max[3] = '1' + fan_idx;
get_option(&fan_min, fanX_min);
get_option(&fan_max, fanX_max);
if (!fan_max || fan_max > 100) /* Constrain fan_max to 100% */
fan_max = 100;
if (fan_min >= 100) /* Constrain fan_min to 99% */
fan_min = 99;
if (fan_max <= fan_min) /* If fan_min is the higher of the two,
it's safer for the hardware to keep
its value. Therefore, update fan_max. */
fan_max = fan_min + 1;
printk(BIOS_DEBUG,
"Setting it8516e fan%d limits to %d%% - %d%% PWM.\n",
fan_idx + 1, fan_min, fan_max);
it8516e_set_fan_limits(fan_idx, fan_min, fan_max);
break;
}
}
static void it8516e_pm2_init(struct device *dev)
{
const config_t *const config = dev->chip_info;
/* TODO: Set frequency / divider? */
ec_set_ports(find_resource(dev, PNP_IDX_IO1)->base,
find_resource(dev, PNP_IDX_IO0)->base);
u8 systemp_type = config->default_systemp;
get_option(&systemp_type, "systemp_type");
if (systemp_type >= IT8516E_SYSTEMP_LASTPLUSONE)
systemp_type = IT8516E_SYSTEMP_NONE;
it8516e_set_systemp_type(systemp_type);
it8516e_set_fan_from_options(config, 0);
it8516e_set_fan_from_options(config, 1);
}
static struct device_operations it8516e_pm2_ops = {
.read_resources = pnp_read_resources,
.set_resources = pnp_set_resources,
.enable_resources = pnp_enable_resources,
.enable = pnp_enable,
.init = it8516e_pm2_init
};
static struct pnp_info it8516e_dev_infos[] = {
{ NULL, IT8516E_LDN_UART1, PNP_IO0 | PNP_IRQ0, { 0x07f8, }, },
{ NULL, IT8516E_LDN_UART2, PNP_IO0 | PNP_IRQ0, { 0x07f8, }, },
{ NULL, IT8516E_LDN_SWUC, PNP_IO0 | PNP_IRQ0, { 0xff7e0, }, },
{ NULL, IT8516E_LDN_MOUSE, PNP_IRQ0, },
{ NULL, IT8516E_LDN_KBD, PNP_IO0 | PNP_IO1 | PNP_IRQ0, { 0x07ff, }, { 0x07ff, }, },
{ NULL, IT8516E_LDN_SMFI, PNP_IO0 | PNP_IRQ0, { 0xfff0, }, },
{ NULL, IT8516E_LDN_BRAM, PNP_IO0 | PNP_IO1, { 0xfffe, }, { 0xfffe, }, },
{ NULL, IT8516E_LDN_PM1, PNP_IO0 | PNP_IO1 | PNP_IRQ0, { 0x07ff, }, { 0x07ff, }, },
{ &it8516e_pm2_ops, IT8516E_LDN_PM2, PNP_IO0 | PNP_IO1 | PNP_IRQ0, { 0x07ff, }, { 0x07ff, }, },
{ NULL, IT8516E_LDN_PM3, PNP_IO0 | PNP_IO1 | PNP_IRQ0, { 0x07ff, }, { 0x07ff, }, },
};
static void it8516e_enable(struct device *dev)
{
pnp_enable_devices(dev, &pnp_ops,
ARRAY_SIZE(it8516e_dev_infos), it8516e_dev_infos);
}
const struct chip_operations ec_kontron_it8516e_ops = {
CHIP_NAME("Kontron (Fintec/ITE) IT8516E EC")
.enable_dev = it8516e_enable
};
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