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- // Tested on ASUS UX32VD
- // DO NOT TRY ON ANY OTHER COMPUTER UNLESS YOU KNOW WHAT YOU ARE DOING!
- //
- // code taken from http://www.aneas.org/knowledge/asus_f3jp_fan_control.php
- // and modified for UX32VD
- // File: fancntrl.c
- // Compile: gcc fancntrl.c -o fanctrl
- // Usage: sudo ./fanctrl <fan speed at 40°C> <fan speed at 50°C> <fan speed at 60°C> <fan speed at 70°C> <fan speed at 80°C>
- // where <fan speed at T°C> is the fan speed expected at T°C from 0x00 (off) to 0xFF (MAX)
- // WARNING!!! This file is proof of concept and is an UGLY hack!
- #include <stdio.h> // printf
- #include <stdlib.h> // atoi
- #include <stdint.h> // uint8_t, uint16_t
- #include <string.h> // strcmp
- #include <unistd.h> // usleep
- #include <sys/io.h> // inb, outb
- //#define DEBUG
- // IO ports
- const uint16_t EC4D = 0x0257; // data register
- const uint16_t EC4C = 0x0258; // command register
- #define ERROR16 (0xFFFF)
- // waits for the status bit to clear, max ERROR16 tries
- uint8_t WEIE() {
- #ifdef DEBUG
- printf("Called : WEIE\n");
- #endif
- uint16_t Local0 = 0xFFFF;
- uint8_t Local1 = inb(EC4C) & 0x02;
- while(Local0 != 0 && Local1 == 0x02) {
- Local1 = inb(EC4C) & 0x02;
- Local0--;
- usleep(5*1000); //sleep 5 msec
- }
- #ifdef DEBUG
- printf("Left : WEIE\n");
- #endif
- return (Local0 == 0);
- }
- // waits for the status bit to clear, max ERROR16 tries
- uint8_t WEOE () {
- #ifdef DEBUG
- printf("Called : WEOE\n");
- #endif
- uint16_t Local0 = 0xFFFF;
- uint8_t Local1 = inb(EC4C) & 0x01;
- while(Local0 != 0 && Local1 == 0x01) {
- Local1 = inb(EC4C) & 0x01;
- Local0--;
- usleep(5*1000); //sleep 5 msec
- inb(EC4D); // maybe not needed?
- }
- #ifdef DEBUG
- printf("Left : WEOE\n");
- #endif
- return (Local0 == 0);
- }
- uint8_t WEOF() {
- #ifdef DEBUG
- printf("Called : WEOF\n");
- #endif
- uint16_t Local0 = 0xFFFF;
- uint8_t Local1 = inb(EC4C) & 0x01;
- while(Local0 != 0 && Local1 == 0x01) {
- Local1 = inb(EC4C) & 0x01;
- Local0--;
- usleep(5*1000); //sleep 5 msec
- }
- #ifdef DEBUG
- printf("Left : WEOF\n");
- #endif
- return (Local0 == 0);
- }
- /* read from RAM */
- uint16_t RRAM (uint16_t Arg0) {
- uint16_t Local0, Local1;
- Local0 = Arg0;
- Local1 = Local0 & 0xFF;
- Local0 = (Local0 >> 0x08);
- Local0 = Local0 & 0xFF;
- if (WEOE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; }
- outb(0xFF, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(0x80, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(Local0, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- outb(Local1, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- if (WEOF() != 0){ return ERROR16; }
- return inb(EC4D);
- }
- /* write to RAM */
- uint16_t WRAM (uint16_t Arg0, uint8_t Arg1) {
- uint16_t Local0, Local1;
- Local0 = Arg0;
- Local1 = Local0 & 0xFF;
- Local0 = (Local0 >> 0x08);
- Local0 = Local0 & 0xFF;
- if (WEOE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; }
- outb(0xFF, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(0x81, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(Local0, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- outb(Local1, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- outb(Arg1, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- return 0;
- }
- // sets the QUIET fan speed
- uint16_t WMFN (uint8_t Arg0) { //ST98
- #ifdef DEBUG
- printf("Called : WMFN 0x%X\n", Arg0);
- #endif
- if (WEOE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; }
- outb(0xFF, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(0x98, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(Arg0, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; } //not needed?
- #ifdef DEBUG
- printf("Left : WMFN\n");
- #endif
- return 0;
- }
- /*
- ST83 Arg0 Arg1
- Read speed of the fan(s). DOES NOT WORK IN MANUAL MODE
- Args:
- Arg0 - 0 = fan1
- - 1 = fan2
- Returns:
- - fan speed 0x0(OFF) - 0xFF(MAX)
- */
- uint16_t RFOV (uint8_t Arg0) { //ST83
- #ifdef DEBUG
- printf("Called : RFOV 0x%X\n", Arg0);
- #endif
- if (Arg0 > 0x01) {
- return ERROR16;
- }
- if (WEOE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; }
- outb(0xFF, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(0x83, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(Arg0, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- if (WEOF() != 0){ return ERROR16; }
- #ifdef DEBUG
- printf("Left : RFOV\n");
- #endif
- return inb(EC4D);
- }
- /*
- ST84 Arg0 Arg1
- Sets speed of the fan(s)
- Args:
- Arg0 - 0 = fan1
- - 1 = fan2
- Arg1 - fan speed 0x0(OFF) - 0xFF(MAX)
- */
- uint16_t WFOV (uint8_t Arg0, uint8_t Arg1) { //ST84
- if (Arg0 > 0x01) {
- return ERROR16;
- }
- if (WEOE() != 0){ return ERROR16; }
- if (WEIE() != 0){ return ERROR16; }
- outb(0xFF, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(0x84, EC4C);
- if (WEIE() != 0){ return ERROR16; }
- outb(Arg0, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- outb(Arg1, EC4D);
- if (WEIE() != 0){ return ERROR16; }
- return 0;
- }
- /*
- SFNV Arg0 Arg1
- Sets speed of the fan(s)
- Args:
- Arg0 - 0 to reset fans to AUTO
- - 1 = fan1
- - 2 = fan2
- Arg1 - if Arg0 == 0, then 0x1 bit reset fan1 0x2 bit reset fan2
- - fan speed 0x0(OFF) - 0xFF(MAX)
- */
- #define SFNV_SET_FAN1 (0x01)
- #define SFNV_SET_FAN2 (0x02)
- #define SFNV_AUTO_FAN1 (0x01)
- #define SFNV_AUTO_FAN2 (0x02)
- #define SFNV_AUTO_ALL (SFNV_AUTO_FAN1 | SFNV_AUTO_FAN2)
- uint16_t SFNV (uint8_t Arg0, uint8_t Arg1) {
- uint16_t Local0;
- // Set the fans to automatic
- if (Arg0 == 0) {
- // set fan1 to AUTO
- if (Arg1 & SFNV_AUTO_FAN1) {
- if ((Local0 = RRAM(0x0521)) == ERROR16) {return ERROR16; };
- Local0 |= 0x80;
- WRAM (0x0521, (uint8_t) (0xFF & Local0)); //ignore error?
- }
- // set fan2 to AUTO
- if (Arg1 & SFNV_AUTO_FAN2) {
- if ((Local0 = RRAM(0x0522)) == ERROR16) {return ERROR16; };
- Local0 |= 0x80;
- WRAM (0x0522, (uint8_t) (0xFF & Local0)); //ignore error?
- }
- return 0;
- }
- // Set the speed of fan1
- else if (Arg0 == SFNV_SET_FAN1) {
- if ((Local0 = RRAM(0x0521)) == ERROR16) {return ERROR16; };
- Local0 &= 0x7F;
- WRAM (0x0521, (uint8_t) (0xFF & Local0)); //ignore error?
- // DECF |= 0x1
- return WFOV (0x00, Arg1);
- }
- // Set the speed of fan2
- else if (Arg0 == SFNV_SET_FAN2) {
- if ((Local0 = RRAM(0x0522) == ERROR16)) {return ERROR16; };
- Local0 &= 0x7F;
- WRAM (0x0522, (uint8_t) (0xFF & Local0)); //ignore error?
- // DECF |= 0x2
- return WFOV (0x01, Arg1);
- }
- return ERROR16;
- }
- int set(int speed) {
- if(ioperm(EC4D, 1, 1)) {
- printf("Error: could not gain access to IO port EC4D (0x%X). Are you root?\n", EC4D);
- return 1;
- }
- if(ioperm(EC4C, 1, 1)) {
- printf("Error: could not gain access to IO port EC4C (0x%X). Are you root?\n", EC4C);
- return 1;
- }
- #if 0
- printf("Fan speeds: \tFan1: %d, Fan2: %d\n", RFOV(0x00), RFOV(0x01));
- #endif
- if (WMFN(speed)) {
- printf("error\n");
- }
- else {
- printf("speed has been set to %d\n",speed);
- }
- // Set FAN1 speed to 0xFF (MAX)
- // SFNV(0x1, 0xFF);
- // Set FAN2 speed to 0x00 (OFF)
- // SFNV(0x2, 0x00);
- // reset both fans back to AUTO control
- // SFNV(0x0, 0x01|0x02);
- return 0;
- }
- int main(int argc, char ** argv) {
- if(argc != 6) {
- printf("usage:\n %s speed[40] speed[50] speed[60] speed[70] speed[80]\n", argv[0]);
- printf("speed[T] is the speed you expect at temperature T (°C)\n");
- return 1;
- }
- uint8_t speed = 0xFF;
- int speed40 = atoi(argv[1]);
- int speed50 = atoi(argv[2]);
- int speed60 = atoi(argv[3]);
- int speed70 = atoi(argv[4]);
- int speed80 = atoi(argv[5]);
- if(speed40 < 1 || speed40 > 255) {
- printf("Error: the speed %d is not possible\n", speed40);
- return 1;
- }
- if(speed50 < 1 || speed50 > 255) {
- printf("Error: the speed %d is not possible\n", speed50);
- return 1;
- }
- if(speed60 < 1 || speed60 > 255) {
- printf("Error: the speed %d is not possible\n", speed60);
- return 1;
- }
- if(speed70 < 1 || speed70 > 255) {
- printf("Error: the speed %d is not possible\n", speed70);
- return 1;
- }
- if(speed80 < 1 || speed80 > 255) {
- printf("Error: the speed %d is not possible\n", speed80);
- return 1;
- }
- FILE *fp;
- int temperature;
- while(1){
- fp = fopen("/sys/class/thermal/thermal_zone0/temp", "r");
- fscanf(fp, "%d", &temperature);
- fclose(fp);
- printf("temperature: %d\n",temperature);
- if (temperature < 40000)
- speed = speed40;
- else if (temperature < 50000)
- speed = speed40 + (temperature-40000)*(speed50-speed40)/10000;
- else if (temperature < 60000)
- speed = speed50 + (temperature-50000)*(speed60-speed50)/10000;
- else if (temperature < 70000)
- speed = speed60 + (temperature-60000)*(speed70-speed60)/10000;
- else
- {speed = speed70 + (temperature-35000)*(speed80-speed70)/10000;
- if (speed > 255) speed = 255;}
- set(speed);
- sleep(5);}
- }
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