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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 Advanced Micro Devices, Inc.
*
* 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 <stdint.h>
#include <arch/cpu.h>
#include <console/console.h>
#include <device/device.h>
#include "southbridge/amd/cimx/sb700/smbus.h" /*SMBUS_IO_BASE*/
#include "w83795.h"
static int w83795_set_bank(u8 bank)
{
return do_smbus_write_byte(SMBUS_IO_BASE, W83795_DEV, W83795_REG_BANKSEL, bank);
}
static u8 w83795_read(u16 reg)
{
int ret;
ret = w83795_set_bank(reg >> 8);
if (ret < 0) {
printk(BIOS_DEBUG, "read faild to set bank %x\n", reg >> 8);
return -1;
}
ret = do_smbus_read_byte(SMBUS_IO_BASE, W83795_DEV, reg & 0xff);
return ret;
}
static u8 w83795_write(u16 reg, u8 value)
{
int err;
err = w83795_set_bank(reg >> 8);
if (err < 0) {
printk(BIOS_DEBUG, "write faild to set bank %x\n", reg >> 8);
return -1;
}
err = do_smbus_write_byte(SMBUS_IO_BASE, W83795_DEV, reg & 0xff, value);
return err;
}
/*
* Enable Digital Temperature Sensor
*/
static void w83795_dts_enable(u8 dts_src)
{
u8 val;
/* DIS */
val = w83795_read(W83795_REG_DTSC);
val |= (dts_src & 0x01);
w83795_write(W83795_REG_DTSC, val);
/* DTSE */
val = w83795_read(W83795_REG_DTSE);
val |= 0xFF;
w83795_write(W83795_REG_DTSE, val);
/* store bank3 regs first before enable DTS */
/*
* TD/TR1-4 thermal diode by default
* 0x00 Disable
* 0x01 thermistors on motherboard
* 0x10 different mode voltage
* 0x11 CPU internal thermal diode output
*
* TR5-6 thermistors by default TRn
*/
val = 0x55; /* thermal diode */
w83795_write(W83795_REG_TEMP_CTRL2, val);
/* Enable Digital Temperature Sensor */
val = w83795_read(W83795_REG_TEMP_CTRL1);
val |= W83795_REG_TEMP_CTRL1_EN_DTS; /* EN_DTS */
w83795_write(W83795_REG_TEMP_CTRL1, val);
}
static void w83795_set_tfmr(w83795_fan_mode_t mode)
{
u8 val;
u8 i;
if ((mode == SMART_FAN_MODE) || (mode == THERMAL_CRUISE_MODE)) {
val = 0xFF;
} else {
val = 0x00;
}
for (i = 0; i < 6; i++)
w83795_write(W83795_REG_TFMR(i), val);
}
static u32 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_tss(void)
{
u8 val;
val = 0x00;
w83795_write(W83795_REG_TSS(0), val); /* Temp1, 2 */
w83795_write(W83795_REG_TSS(1), val); /* Temp3, 4 */
w83795_write(W83795_REG_TSS(2), val); /* Temp5, 6 */
}
static void w83795_set_fan(w83795_fan_mode_t mode)
{
u8 i;
/* select temperature sensor (TSS)*/
w83795_set_tss();
/* select Temperature to Fan mapping Relationships (TFMR)*/
w83795_set_tfmr(mode);
/* set fan output controlled mode (FCMS)*/
w83795_set_fan_mode(mode);
/* Set Critical Temperature to Full Speed all fan (CTFS) */
for (i = 0; i < 6; i++) {
w83795_write(W83795_REG_CTFS(i), 0x50); /* default 80 celsius degree */
}
if (mode == THERMAL_CRUISE_MODE) {
/* Set Target Temperature of Temperature Inputs (TTTI) */
for (i = 0; i < 6; i++) {
w83795_write(W83795_REG_TTTI(i), 0x28); /* default 40 celsius degree */
}
} else 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 void w83795_init(w83795_fan_mode_t mode, u8 dts_src)
{
u8 i;
u8 val;
if (do_smbus_read_byte(SMBUS_IO_BASE, W83795_DEV, 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 if ((val & W83795_REG_CONFIG_CONFIG48) == 1)
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 monitoring setting */
val = 0xFF; /* FAN1-FAN8 */
w83795_write(W83795_REG_FANIN_CTRL1, val);
val = 0x3F; /* FAN9-FAN14 */
w83795_write(W83795_REG_FANIN_CTRL2, val);
/* enable monitoring operations */
val = w83795_read(W83795_REG_CONFIG);
val |= W83795_REG_CONFIG_START;
w83795_write(W83795_REG_CONFIG, val);
w83795_dts_enable(dts_src);
w83795_set_fan(mode);
printk(BIOS_INFO, "Fan CTFS(celsius) TTTI(celsius)\n");
for (i = 0; i < 6; i++) {
val = w83795_read(W83795_REG_CTFS(i));
printk(BIOS_INFO, " %x %d", i, val);
val = w83795_read(W83795_REG_TTTI(i));
printk(BIOS_INFO, " %d\n", val);
}
/* Temperature ReadOut */
for (i = 0; i < 9; i++) {
val = w83795_read(W83795_REG_DTS(i));
printk(BIOS_DEBUG, "DTS%x ReadOut=%x\n", i, val);
}
}
static void w83795_hwm_init(struct device *dev)
{
struct device *cpu;
struct cpu_info *info;
info = cpu_info();
cpu = info->cpu;
if (!cpu)
die("CPU: missing cpu device structure");
if (cpu->vendor == X86_VENDOR_AMD)
w83795_init(THERMAL_CRUISE_MODE, DTS_SRC_AMD_SBTSI);
else if (cpu->vendor == X86_VENDOR_INTEL)
w83795_init(THERMAL_CRUISE_MODE, DTS_SRC_INTEL_PECI);
else
printk(BIOS_ERR, "Neither AMD nor INTEL CPU detected\n");
}
static struct device_operations w83795_operations = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.init = w83795_hwm_init,
};
static void enable_dev(struct device *dev)
{
dev->ops = &w83795_operations;
}
struct chip_operations drivers_i2c_w83795_ops = {
CHIP_NAME("Nuvoton W83795G/ADG Hardware Monitor")
.enable_dev = enable_dev,
};
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