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Lukas Stancik
2020-12-26 19:28:14 +00:00
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.cache.mk
LICENSE
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GNU GENERAL PUBLIC LICENSE
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Makefile
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obj-m := asus_u36sd_fan.o
KVER ?= $(shell uname -r)
KDIR ?= /lib/modules/$(KVER)/build
default:
$(MAKE) -C $(KDIR) M=$(CURDIR) modules
install:
$(MAKE) -C $(KDIR) M=$(CURDIR) modules_install
load:
-/sbin/rmmod asus_u36sd_fan
/sbin/insmod asus_u36sd_fan.ko
clean:
$(MAKE) -C $(KDIR) M=$(CURDIR) clean
dkms-add:
/usr/sbin/dkms add $(CURDIR)
dkms-build:
/usr/sbin/dkms build asus_u36sd_fan/0.1
dkms-remove:
/usr/sbin/dkms remove asus_u36sd_fan/0.1 --all
asus_u36sd_fan.c
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/*
* asus_u36sd_fan.c - ASUS U36SD Fan Control driver using ACPI calls
*
*
* Copyright (C) 2013 Lukas Stancik
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* The development page for this driver is located at
*
* Based upon asus_fan.c by Giulio Piemontese
* http://github.com/gpiemont/asusfan/
*
* Previusly (by Dmitry Ursegov)
* http://code.google.com/p/asusfan/
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/acpi.h>
MODULE_AUTHOR("Lukas Stancik");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ASUS U36SD Fan Control");
#ifndef ASUSFAN_VERBOSE
#define ASUSFAN_VERBOSE 0
#endif
#ifndef ASUSFAN_STABLE_RANGE
#define ASUSFAN_STABLE_RANGE 1
#endif
#ifndef ASUSFAN_TEMP_NUM_SAMPLES
#define ASUSFAN_TEMP_NUM_SAMPLES 5
#endif
MODULE_PARM_DESC(verbose, "Enable Speed changing/temperature status messages (0-2)");
int asusfan_verbose = ASUSFAN_VERBOSE;
module_param_named(verbose, asusfan_verbose, int, 0600);
MODULE_PARM_DESC(current_zone, "Current thermal zone");
int asusfan_curr_zone = -1;
module_param_named(current_zone, asusfan_curr_zone, int, 0444);
MODULE_PARM_DESC(previous_zone, "Previous thermal zone");
int asusfan_prev_zone = -1;
module_param_named(previous_zone, asusfan_prev_zone, int, 0444);
MODULE_PARM_DESC(current_speed, "Current fan speed");
int asusfan_curr_speed = -1;
module_param_named(current_speed, asusfan_curr_speed, int, 0444);
MODULE_PARM_DESC(target_speed, "Manually set target fan speed (Dangerous!)");
int asusfan_target_speed = -1;
module_param_named(target_speed, asusfan_target_speed, int, 0600);
MODULE_PARM_DESC(max_speed, "Maximum supported speed");
int asusfan_max_speed = 255;
module_param_named(max_speed, asusfan_max_speed, int, 0400);
MODULE_PARM_DESC(min_speed, "Minumum supported speed");
int asusfan_min_speed = 0;
module_param_named(min_speed, asusfan_min_speed, int, 0400);
MODULE_PARM_DESC(current_temp, "Current temperature value (°C)");
int asusfan_curr_temp = -1;
module_param_named(current_temp, asusfan_curr_temp, int, 0444);
MODULE_PARM_DESC(max_temp, "Maximum temperature value (°C) that can be evaluated");
int asusfan_max_temp = 110;
module_param_named(max_temp, asusfan_max_temp, int, 0444);
MODULE_PARM_DESC(min_temp, "Minimum temperature value (°C) that can be evaluated");
int asusfan_min_temp = 0;
module_param_named(min_temp, asusfan_min_temp, int, 0444);
MODULE_PARM_DESC(temp_stable_range, "Within this range (+/-) temperature is considered stable");
int asusfan_stable_range = ASUSFAN_STABLE_RANGE;
module_param_named(temp_stable_range, asusfan_stable_range, int, 0600);
MODULE_PARM_DESC(temp_num_samples, "Number of samples to establish the temperature behaviour");
int asusfan_num_samples = 0;
module_param_named(temp_num_samples, asusfan_num_samples, int, 0600);
/*
* We took a pre-defined number of samples of temperature from the acpi,
* then we try to guess the ongoing curve. This is done in a separated thread.
*/
unsigned int fan_sample = 0;
char fan_num_samples = ASUSFAN_TEMP_NUM_SAMPLES;
char samples[ASUSFAN_TEMP_NUM_SAMPLES] ;
#define MONITOR_FREQ 1
/*
* When the temperature goes down to a low zone it is better to stay at
* a high speed some degrees more to reduce fan speed switching
*/
#define NUM_ZONES 9
#define TMP_DIFF 3
#define TIMER_FREQ 10 /* seconds */
struct tmp_zone {
int tmp; /* °C */
int speed; /* 80-255 (0 - fan is disabled) */
unsigned int sleep; /* Sleep for sleep seconds more at tmp temperature */
};
int asusfan_current_zone = -1;
typedef enum status {
stable,
ascending,
descending
} status_t;
status_t __thermal_status = stable;
const char * const status_name[3] = {
"stable",
"ascending",
"descending"
};
MODULE_PARM_DESC(temp_status, "Current temperature status");
char * asusfan_temp_status = "";
module_param_named(temp_status, asusfan_temp_status, charp, 0444);
static struct tmp_zone zone[NUM_ZONES] = { { 45, 0,1 },
{ 50, 80,1 },
{ 55, 100,1 },
{ 60, 110,1 },
{ 65, 130,1 },
{ 70, 140,2 },
{ 85, 160,3 },
{ 100,190,5 },
{ 105,210,7 }};
static void timer_handler(struct work_struct *work);
static void temp_status_timer(struct work_struct *work);
static DECLARE_DELAYED_WORK(ws, timer_handler);
static DECLARE_DELAYED_WORK(wst, temp_status_timer);
static struct workqueue_struct *wqs;
static struct workqueue_struct *wqst;
static int get_zone_temp(void)
{
struct acpi_buffer output;
union acpi_object out_obj;
acpi_status status;
int tmp;
output.length = sizeof(out_obj);
output.pointer = &out_obj;
//Get current temperature
status = acpi_evaluate_object(NULL, "\\_TZ.THRM._TMP",
NULL, &output);
if (status != AE_OK) printk("_TZ.THRM._TMP error\n");
tmp = (int)((out_obj.integer.value-2732))/10;
if((tmp > asusfan_max_temp ) || (tmp < asusfan_min_temp))
return -1;
if(asusfan_curr_temp != tmp)
asusfan_curr_temp = tmp;
return tmp;
}
static void set_fan_speed(int speed)
{
struct acpi_object_list params;
union acpi_object in_objs[2];
acpi_status status;
//Set fan speed
params.count = ARRAY_SIZE(in_objs);
params.pointer = &(*in_objs);
in_objs[0].type = ACPI_TYPE_INTEGER;
in_objs[0].integer.value = 1;
in_objs[1].type = ACPI_TYPE_INTEGER;
in_objs[1].integer.value = speed;
if(asusfan_verbose)
printk("ACPI called (_SB.PCI0.SBRG.EC0.SFNV 1 %d)\n", speed);
status = acpi_evaluate_object(NULL, "\\_SB.PCI0.SBRG.EC0.SFNV",
&params, NULL);
if (status != AE_OK) printk("ASUS Fan ACPI call (_SB.PCI0.SBRG.EC0.SFNV 1 %d) error\n", speed);
}
static void timer_handler(struct work_struct *work)
{
static int prev_zone = 0;
int curr_zone = 0;
int tmp;
tmp = get_zone_temp();
if (unlikely(tmp == -1))
return;
if(tmp >= zone[NUM_ZONES-1].tmp)
goto out;
//Set fan speed and save previous zone
for(curr_zone=0; curr_zone<(NUM_ZONES-1); curr_zone++)
if(tmp < zone[curr_zone].tmp)
break;
if(unlikely(curr_zone < prev_zone &&
tmp > zone[curr_zone].tmp - TMP_DIFF )) {
set_fan_speed(zone[prev_zone].speed);
asusfan_curr_speed = zone[prev_zone].speed;
if (asusfan_verbose > 0)
printk("ASUS Fan: tmp = %d, curr zone %d, prev zone %d, speed set to %d\n",
tmp, curr_zone, prev_zone, zone[prev_zone].speed);
}
else {
set_fan_speed(zone[curr_zone].speed);
asusfan_curr_speed = zone[curr_zone].speed;
prev_zone = curr_zone;
if (asusfan_verbose > 0)
printk("asus_fan: tmp = %d, curr zone %d, prev zone %d, speed set to %d\n",
tmp, curr_zone, prev_zone, zone[curr_zone].speed);
}
out:
queue_delayed_work(wqs, &ws, (TIMER_FREQ + zone[curr_zone].sleep) * HZ);
}
static void temp_status_timer(struct work_struct *work)
{
int i = 0;
int diff = 0;
samples[0] = get_zone_temp();
/* "Parabolic" tolerance curve */
if ((fan_sample % ASUSFAN_TEMP_NUM_SAMPLES) == 0)
{
diff = (samples[0] - samples[fan_num_samples - 1]);
if(asusfan_verbose > 1)
printk("sample[0] = %d , sample[%d] = %d, diff = %d\n", samples[0], fan_num_samples - 1, samples[fan_num_samples-1], diff);
if((diff <= asusfan_stable_range) && ( diff >= -asusfan_stable_range))
{
__thermal_status = stable;
asusfan_temp_status = status_name[0];
}
else if(diff > asusfan_stable_range )
{
__thermal_status = ascending;
asusfan_temp_status = status_name[1];
}
else if(diff < -asusfan_stable_range )
{
__thermal_status = descending;
asusfan_temp_status = status_name[2];
}
if(asusfan_verbose > 1)
printk("sample[0] = %d ", samples[0]);
while(++i < fan_num_samples) {
samples[fan_num_samples - i] = samples[fan_num_samples - i -1];
if(asusfan_verbose > 1)
printk("sample[%d] = %d ", i, samples[i]);
}
if(asusfan_verbose > 1)
printk("\n");
}
queue_delayed_work(wqst, &wst, MONITOR_FREQ * HZ);
}
static int asus_fan_init(void)
{
memset(&samples, 0, fan_num_samples);
//Workqueue settings
wqs = create_singlethread_workqueue("tmp");
queue_delayed_work(wqs, &ws, HZ);
wqst = create_singlethread_workqueue("sampler");
queue_delayed_work(wqst, &wst, HZ);
printk("ASUS U36SD Fan Control version 0.9\n");
return 0;
}
static void asus_fan_exit(void)
{
set_fan_speed(-1);
cancel_delayed_work(&ws);
flush_workqueue(wqs);
destroy_workqueue(wqs);
cancel_delayed_work(&wst);
flush_workqueue(wqst);
destroy_workqueue(wqst);
printk("ASUS U36SD Fan Control driver unloaded\n");
}
module_init(asus_fan_init);
module_exit(asus_fan_exit);
dkms.conf
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PACKAGE_NAME=asus_u36sd_fan
PACKAGE_VERSION=0.1
CLEAN="make clean"
BUILT_MODULE_NAME[0]=asus_u36sd_fan
DEST_MODULE_LOCATION[0]=/extra
MAKE[0]="make KVER=${kernelver} KDIR=/lib/modules/${kernelver}/build"
AUTOINSTALL="yes"