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/*
* Copyright (C) 2012 Advanced Micro Devices, Inc.
* Copyright (C) 2015-2017 Raptor Engineering
*
* 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 <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include <sys/ioctl.h>
#include <linux/i2c-dev.h>
#include "w83795.h"
#define BIOS_DEBUG 0
#define BIOS_INFO 1
#define BIOS_WARNING 2
#define BIOS_ERR 3
extern int smbus_fd;
// =========================================================================================================================
// Taken from lm-sensors
// =========================================================================================================================
#define I2C_SMBUS_READ 1
#define I2C_SMBUS_WRITE 0
#define I2C_SMBUS_BLOCK_MAX 32
#define I2C_SMBUS_BYTE_DATA 2
#define I2C_SMBUS 0x0720
union i2c_smbus_data {
__u8 byte;
__u16 word;
__u8 block[I2C_SMBUS_BLOCK_MAX + 2];
};
static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command, int size, union i2c_smbus_data *data) {
struct i2c_smbus_ioctl_data args;
args.read_write = read_write;
args.command = command;
args.size = size;
args.data = data;
return ioctl(file,I2C_SMBUS,&args);
}
static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
{
union i2c_smbus_data data;
if (i2c_smbus_access(file,I2C_SMBUS_READ,command, I2C_SMBUS_BYTE_DATA,&data))
return -1;
else
return 0x0ff & data.byte;
}
static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command, __u8 value) {
union i2c_smbus_data data;
data.byte = value;
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command, I2C_SMBUS_BYTE_DATA, &data);
}
// =========================================================================================================================
int smbus_write_byte(uint8_t addr, uint8_t value) {
return i2c_smbus_write_byte_data(smbus_fd, addr, value);
}
uint8_t smbus_read_byte(uint8_t addr) {
return i2c_smbus_read_byte_data(smbus_fd, addr);
}
void printk(int severity, const char* format, ...) {
va_list args;
va_start(args, format);
vprintf(format, args);
va_end(args);
}
static int w83795_set_bank(uint8_t bank)
{
return smbus_write_byte(W83795_REG_BANKSEL, bank);
}
static uint8_t w83795_read(uint16_t reg)
{
int ret;
ret = w83795_set_bank(reg >> 8);
if (ret < 0) {
printk(BIOS_DEBUG, "read failed to set bank %x\n", reg >> 8);
return -1;
}
ret = smbus_read_byte(reg & 0xff);
return ret;
}
static uint8_t w83795_write(uint16_t reg, uint8_t value)
{
int err;
err = w83795_set_bank(reg >> 8);
if (err < 0) {
printk(BIOS_DEBUG, "write failed to set bank %x\n", reg >> 8);
return -1;
}
err = smbus_write_byte(reg & 0xff, value);
return err;
}
/*
* Configure Digital Temperature Sensor
*/
static void w83795_dts_configure(uint8_t dts_src)
{
uint8_t val;
/* DIS */
val = w83795_read(W83795_REG_DTSC) & ~0x1;
val |= dts_src & 0x1;
w83795_write(W83795_REG_DTSC, val);
/* TODO
* Determine if DTS interface needs to be reset
* (W83795_REG_DTSC bit 7) before operation.
*/
}
static uint32_t w83795_set_fan_mode(w83795_fan_mode_t mode)
{
if (mode == SPEED_CRUISE_MODE) {
w83795_write(W83795_REG_FCMS1, 0xFF);
printk(BIOS_INFO, "W83795G/ADG work in Speed Cruise Mode\n");
} else {
w83795_write(W83795_REG_FCMS1, 0x00);
if (mode == THERMAL_CRUISE_MODE) {
w83795_write(W83795_REG_FCMS2, 0x00);
printk(BIOS_INFO, "W83795G/ADG work in Thermal Cruise Mode\n");
} else if (mode == SMART_FAN_MODE) {
w83795_write(W83795_REG_FCMS2, 0x3F);
printk(BIOS_INFO, "W83795G/ADG work in Smart Fan Mode\n");
} else {
printk(BIOS_INFO, "W83795G/ADG work in Manual Mode\n");
return -1;
}
}
return 0;
}
static void w83795_set_fan(w83795_fan_mode_t mode)
{
/* set fan output controlled mode (FCMS)*/
w83795_set_fan_mode(mode);
if (mode == SMART_FAN_MODE) {
/* Set the Relative Register-at SMART FAN IV Control Mode Table */
//SFIV TODO
}
/* Set Hysteresis of Temperature (HT) */
//TODO
}
static uint8_t fan_pct_to_cfg_val(uint8_t percent)
{
uint16_t cfg = (((unsigned int)percent * 10000) / 3922);
if (cfg > 0xff)
cfg = 0xff;
return cfg;
}
static uint8_t millivolts_to_limit_value_type1(int millivolts)
{
/* Datasheet v1.41 pages 44 and 70 (VSEN1 - VSEN11, VTT) */
return ((millivolts / 2) >> 2);
}
static uint8_t millivolts_to_limit_value_type2(int millivolts)
{
/* Datasheet v1.41 page pages 44 and 70 (3VSB, 3VDD, VBAT) */
return ((millivolts / 6) >> 2);
}
static uint16_t millivolts_to_limit_value_type3(int millivolts)
{
/* Datasheet v1.41 page 45 (VSEN12, VSEN13, VDSEN14 - VDSEN17) */
return (millivolts / 2);
}
void w83795_init(w83795_fan_mode_t mode, uint8_t dts_src, struct drivers_i2c_w83795_config *config)
{
uint8_t i;
uint8_t val;
uint16_t limit_value;
if (smbus_read_byte(0x00) < 0) {
printk(BIOS_ERR, "W83795G/ADG Nuvoton H/W Monitor not found\n");
return;
}
val = w83795_read(W83795_REG_CONFIG);
if ((val & W83795_REG_CONFIG_CONFIG48) == 0)
printk(BIOS_INFO, "Found 64 pin W83795G Nuvoton H/W Monitor\n");
else
printk(BIOS_INFO, "Found 48 pin W83795ADG Nuvoton H/W Monitor\n");
/* Reset */
val |= W83795_REG_CONFIG_INIT;
w83795_write(W83795_REG_CONFIG, val);
/* Fan monitor settings */
w83795_write(W83795_REG_FANIN_CTRL1, config->fanin_ctl1);
w83795_write(W83795_REG_FANIN_CTRL2, config->fanin_ctl2);
/* Temperature thresholds */
w83795_write(W83795_REG_TEMP_CRIT(0), config->tr1_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(0), config->tr1_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(0), config->tr1_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(0), config->tr1_warning_hysteresis);
w83795_write(W83795_REG_TEMP_CRIT(1), config->tr2_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(1), config->tr2_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(1), config->tr2_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(1), config->tr2_warning_hysteresis);
w83795_write(W83795_REG_TEMP_CRIT(2), config->tr3_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(2), config->tr3_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(2), config->tr3_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(2), config->tr3_warning_hysteresis);
w83795_write(W83795_REG_TEMP_CRIT(3), config->tr4_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(3), config->tr4_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(3), config->tr4_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(3), config->tr4_warning_hysteresis);
w83795_write(W83795_REG_TEMP_CRIT(4), config->tr5_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(4), config->tr5_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(4), config->tr5_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(4), config->tr5_warning_hysteresis);
w83795_write(W83795_REG_TEMP_CRIT(5), config->tr6_critical_temperature);
w83795_write(W83795_REG_TEMP_CRIT_HYSTER(5), config->tr6_critical_hysteresis);
w83795_write(W83795_REG_TEMP_WARN(5), config->tr6_warning_temperature);
w83795_write(W83795_REG_TEMP_WARN_HYSTER(5), config->tr6_warning_hysteresis);
/* DTS temperature thresholds */
w83795_write(W83795_REG_DTS_CRIT, config->dts_critical_temperature);
w83795_write(W83795_REG_DTS_CRIT_HYSTER, config->dts_critical_hysteresis);
w83795_write(W83795_REG_DTS_WARN, config->dts_warning_temperature);
w83795_write(W83795_REG_DTS_WARN_HYSTER, config->dts_warning_hysteresis);
/* Configure DTS registers in bank3 before enabling DTS */
w83795_dts_configure(dts_src);
/* DTS enable */
w83795_write(W83795_REG_DTSE, config->temp_dtse);
/* Temperature monitor settings */
w83795_write(W83795_REG_TEMP_CTRL1, config->temp_ctl1);
w83795_write(W83795_REG_TEMP_CTRL2, config->temp_ctl2);
/* Temperature to fan mappings */
w83795_write(W83795_REG_TFMR(0), config->temp1_fan_select);
w83795_write(W83795_REG_TFMR(1), config->temp2_fan_select);
w83795_write(W83795_REG_TFMR(2), config->temp3_fan_select);
w83795_write(W83795_REG_TFMR(3), config->temp4_fan_select);
w83795_write(W83795_REG_TFMR(4), config->temp5_fan_select);
w83795_write(W83795_REG_TFMR(5), config->temp6_fan_select);
/* Temperature data source to temperature mappings */
w83795_write(W83795_REG_T12TSS, ((config->temp2_source_select & 0x0f) << 4) | (config->temp1_source_select & 0x0f));
w83795_write(W83795_REG_T34TSS, ((config->temp4_source_select & 0x0f) << 4) | (config->temp3_source_select & 0x0f));
w83795_write(W83795_REG_T56TSS, ((config->temp6_source_select & 0x0f) << 4) | (config->temp5_source_select & 0x0f));
/* Set critical temperatures
* If any sensor exceeds the associated critical temperature,
* all fans will be forced to full speed.
*/
w83795_write(W83795_REG_CTFS(0), config->temp1_critical_temperature);
w83795_write(W83795_REG_CTFS(1), config->temp2_critical_temperature);
w83795_write(W83795_REG_CTFS(2), config->temp3_critical_temperature);
w83795_write(W83795_REG_CTFS(3), config->temp4_critical_temperature);
w83795_write(W83795_REG_CTFS(4), config->temp5_critical_temperature);
w83795_write(W83795_REG_CTFS(5), config->temp6_critical_temperature);
/* Set fan control target temperatures */
w83795_write(W83795_REG_TTTI(0), config->temp1_target_temperature);
w83795_write(W83795_REG_TTTI(1), config->temp2_target_temperature);
w83795_write(W83795_REG_TTTI(2), config->temp3_target_temperature);
w83795_write(W83795_REG_TTTI(3), config->temp4_target_temperature);
w83795_write(W83795_REG_TTTI(4), config->temp5_target_temperature);
w83795_write(W83795_REG_TTTI(5), config->temp6_target_temperature);
/* Set fan stall prevention parameters */
w83795_write(W83795_REG_FAN_NONSTOP(0), config->fan1_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(1), config->fan2_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(2), config->fan3_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(3), config->fan4_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(4), config->fan5_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(5), config->fan6_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(6), config->fan7_nonstop);
w83795_write(W83795_REG_FAN_NONSTOP(7), config->fan8_nonstop);
/* Set fan default speed */
w83795_write(W83795_REG_DFSP, fan_pct_to_cfg_val(config->default_speed));
/* Set initial fan speeds */
w83795_write(W83795_REG_FAN_MANUAL_SPEED(0), fan_pct_to_cfg_val(config->fan1_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(1), fan_pct_to_cfg_val(config->fan2_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(2), fan_pct_to_cfg_val(config->fan3_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(3), fan_pct_to_cfg_val(config->fan4_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(4), fan_pct_to_cfg_val(config->fan5_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(5), fan_pct_to_cfg_val(config->fan6_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(6), fan_pct_to_cfg_val(config->fan7_duty));
w83795_write(W83795_REG_FAN_MANUAL_SPEED(7), fan_pct_to_cfg_val(config->fan8_duty));
/* Voltage monitor settings */
w83795_write(W83795_REG_VOLT_CTRL1, config->volt_ctl1);
w83795_write(W83795_REG_VOLT_CTRL2, config->volt_ctl2);
/* Voltage high/low limits */
w83795_write(W83795_REG_VOLT_LIM_HIGH(0), millivolts_to_limit_value_type1(config->vcore1_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(0), millivolts_to_limit_value_type1(config->vcore1_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(1), millivolts_to_limit_value_type1(config->vcore2_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(1), millivolts_to_limit_value_type1(config->vcore2_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(2), millivolts_to_limit_value_type1(config->vsen3_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(2), millivolts_to_limit_value_type1(config->vsen3_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(3), millivolts_to_limit_value_type1(config->vsen4_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(3), millivolts_to_limit_value_type1(config->vsen4_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(4), millivolts_to_limit_value_type1(config->vsen5_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(4), millivolts_to_limit_value_type1(config->vsen5_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(5), millivolts_to_limit_value_type1(config->vsen6_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(5), millivolts_to_limit_value_type1(config->vsen6_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(6), millivolts_to_limit_value_type1(config->vsen7_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(6), millivolts_to_limit_value_type1(config->vsen7_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(7), millivolts_to_limit_value_type1(config->vsen8_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(7), millivolts_to_limit_value_type1(config->vsen8_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(8), millivolts_to_limit_value_type1(config->vsen9_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(8), millivolts_to_limit_value_type1(config->vsen9_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(9), millivolts_to_limit_value_type1(config->vsen10_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(9), millivolts_to_limit_value_type1(config->vsen10_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(10), millivolts_to_limit_value_type1(config->vsen11_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(10), millivolts_to_limit_value_type1(config->vsen11_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(11), millivolts_to_limit_value_type1(config->vtt_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(11), millivolts_to_limit_value_type1(config->vtt_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(12), millivolts_to_limit_value_type2(config->vdd_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(12), millivolts_to_limit_value_type2(config->vdd_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(13), millivolts_to_limit_value_type2(config->vsb_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(13), millivolts_to_limit_value_type2(config->vsb_low_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_HIGH(14), millivolts_to_limit_value_type2(config->vbat_high_limit_mv));
w83795_write(W83795_REG_VOLT_LIM_LOW(14), millivolts_to_limit_value_type2(config->vbat_low_limit_mv));
/* VSEN12 limits */
if (config->temp_ctl1 & 0x2) {
limit_value = millivolts_to_limit_value_type3(config->vsen12_high_limit_mv);
w83795_write(W83795_REG_VOLT_LIM_HIGH_2_M(4), limit_value >> 2);
w83795_write(W83795_REG_VOLT_LIM_HIGH_2_L(4), limit_value & 0x3);
limit_value = millivolts_to_limit_value_type3(config->vsen12_low_limit_mv);
w83795_write(W83795_REG_VOLT_LIM_LOW_2_M(4), limit_value >> 2);
w83795_write(W83795_REG_VOLT_LIM_LOW_2_L(4), limit_value & 0x3);
}
/* VSEN13 limits */
if (config->temp_ctl1 & 0x8) {
limit_value = millivolts_to_limit_value_type3(config->vsen13_high_limit_mv);
w83795_write(W83795_REG_VOLT_LIM_HIGH_2_M(5), limit_value >> 2);
w83795_write(W83795_REG_VOLT_LIM_HIGH_2_L(5), limit_value & 0x3);
limit_value = millivolts_to_limit_value_type3(config->vsen13_low_limit_mv);
w83795_write(W83795_REG_VOLT_LIM_LOW_2_M(5), limit_value >> 2);
w83795_write(W83795_REG_VOLT_LIM_LOW_2_L(5), limit_value & 0x3);
}
w83795_set_fan(mode);
/* Show current fan control settings */
printk(BIOS_INFO, "Fan\tCTFS(celsius)\tTTTI(celsius)\n");
for (i = 0; i < 6; i++) {
val = w83795_read(W83795_REG_CTFS(i));
printk(BIOS_INFO, " %x\t%d", i + 1, val);
val = w83795_read(W83795_REG_TTTI(i));
printk(BIOS_INFO, "\t%d\n", val);
}
/* Show current temperatures */
for (i = 0; i < 8; i++) {
val = w83795_read(W83795_REG_DTS(i));
printk(BIOS_DEBUG, "DTS%x current value: %x\n", i + 1, val);
}
/* Start monitoring / fan control */
val = w83795_read(W83795_REG_CONFIG);
val |= W83795_REG_CONFIG_START;
w83795_write(W83795_REG_CONFIG, val);
}
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