// SPDX-License-Identifier: GPL-2.0-or-later
/*
* acerhdf - A driver which monitors the temperature
* of the aspire one netbook , turns on / off the fan
* as soon as the upper / lower threshold is reached .
*
* ( C ) 2009 - Peter Kaestle peter ( a ) piie . net
* https : //piie.net
* 2009 Borislav Petkov bp ( a ) alien8 . de
*
* Inspired by and many thanks to :
* o acerfand - Rachel Greenham
* o acer_ec . pl - Michael Kurz michi . kurz ( at ) googlemail . com
* - Petr Tomasek tomasek ( # ) etf , cuni , cz
* - Carlos Corbacho cathectic ( at ) gmail . com
* o lkml - Matthew Garrett
* - Borislav Petkov
* - Andreas Mohr
*/
#define pr_fmt(fmt) "acerhdf: " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include <linux/platform_device.h>
/*
* The driver is started with " kernel mode off " by default . That means , the BIOS
* is still in control of the fan . In this mode the driver allows to read the
* temperature of the cpu and a userspace tool may take over control of the fan .
* If the driver is switched to " kernel mode " ( e . g . via module parameter ) the
* driver is in full control of the fan . If you want the module to be started in
* kernel mode by default , define the following :
*/
#undef START_IN_KERNEL_MODE
#define DRV_VER "0.7.0"
/*
* According to the Atom N270 datasheet ,
* ( http : //download.intel.com/design/processor/datashts/320032.pdf) the
* CPU ' s optimal operating limits denoted in junction temperature as
* measured by the on - die thermal monitor are within 0 < = Tj < = 90 . So ,
* assume 89 ° C is critical temperature .
*/
#define ACERHDF_DEFAULT_TEMP_FANON 60000
#define ACERHDF_DEFAULT_TEMP_FANOFF 53000
#define ACERHDF_TEMP_CRIT 89000
#define ACERHDF_FAN_OFF 0
#define ACERHDF_FAN_AUTO 1
/*
* No matter what value the user puts into the fanon variable , turn on the fan
* at 80 degree Celsius to prevent hardware damage
*/
#define ACERHDF_MAX_FANON 80000
/*
* Maximum interval between two temperature checks is 15 seconds , as the die
* can get hot really fast under heavy load ( plus we shouldn ' t forget about
* possible impact of _ external_ aggressive sources such as heaters , sun etc . )
*/
#define ACERHDF_MAX_INTERVAL 15
#ifdef START_IN_KERNEL_MODE
static int kernelmode = 1 ;
#else
static int kernelmode;
#endif
static unsigned int interval = 10 ;
static unsigned int fanon = ACERHDF_DEFAULT_TEMP_FANON;
static unsigned int fanoff = ACERHDF_DEFAULT_TEMP_FANOFF;
static unsigned int verbose;
static unsigned int list_supported;
static unsigned int fanstate = ACERHDF_FAN_AUTO;
static char force_bios[16 ];
static char force_product[16 ];
static struct thermal_zone_device *thz_dev;
static struct thermal_cooling_device *cl_dev;
static struct platform_device *acerhdf_dev;
module_param(kernelmode, uint, 0 );
MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off" );
module_param(fanon, uint, 0600 );
MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature" );
module_param(fanoff, uint, 0600 );
MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature" );
module_param(verbose, uint, 0600 );
MODULE_PARM_DESC(verbose, "Enable verbose dmesg output" );
module_param(list_supported, uint, 0600 );
MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions" );
module_param_string(force_bios, force_bios, 16 , 0 );
MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version" );
module_param_string(force_product, force_product, 16 , 0 );
MODULE_PARM_DESC(force_product, "Pretend system is this known supported model" );
/*
* cmd_off : to switch the fan completely off and check if the fan is off
* cmd_auto : to set the BIOS in control of the fan . The BIOS regulates then
* the fan speed depending on the temperature
*/
struct fancmd {
u8 cmd_off;
u8 cmd_auto;
};
struct manualcmd {
u8 mreg;
u8 moff;
};
/* default register and command to disable fan in manual mode */
static const struct manualcmd mcmd = {
.mreg = 0 x94,
.moff = 0 xff,
};
/* BIOS settings - only used during probe */
struct bios_settings {
const char *vendor;
const char *product;
const char *version;
u8 fanreg;
u8 tempreg;
struct fancmd cmd;
int mcmd_enable;
};
/* This could be a daughter struct in the above, but not worth the redirect */
struct ctrl_settings {
u8 fanreg;
u8 tempreg;
struct fancmd cmd;
int mcmd_enable;
};
static struct thermal_trip trips[] = {
[0 ] = { .temperature = ACERHDF_DEFAULT_TEMP_FANON,
.hysteresis = ACERHDF_DEFAULT_TEMP_FANON - ACERHDF_DEFAULT_TEMP_FANOFF,
.type = THERMAL_TRIP_ACTIVE },
[1 ] = { .temperature = ACERHDF_TEMP_CRIT,
.type = THERMAL_TRIP_CRITICAL }
};
static struct ctrl_settings ctrl_cfg __read_mostly;
/* Register addresses and values for different BIOS versions */
static const struct bios_settings bios_tbl[] __initconst = {
/* AOA110 */
{"Acer" , "AOA110" , "v0.3109" , 0 x55, 0 x58, {0 x1f, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3114" , 0 x55, 0 x58, {0 x1f, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3301" , 0 x55, 0 x58, {0 xaf, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3304" , 0 x55, 0 x58, {0 xaf, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3305" , 0 x55, 0 x58, {0 xaf, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3307" , 0 x55, 0 x58, {0 xaf, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3308" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3309" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Acer" , "AOA110" , "v0.3310" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
/* AOA150 */
{"Acer" , "AOA150" , "v0.3114" , 0 x55, 0 x58, {0 x1f, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3301" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3304" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3305" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3307" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3308" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3309" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AOA150" , "v0.3310" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
/* LT1005u */
{"Acer" , "LT-10Q" , "v0.3310" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
/* Acer 1410 */
{"Acer" , "Aspire 1410" , "v0.3108" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v0.3113" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v0.3115" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v0.3117" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v0.3119" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v0.3120" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v1.3204" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v1.3303" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v1.3308" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v1.3310" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1410" , "v1.3314" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
/* Acer 1810xx */
{"Acer" , "Aspire 1810TZ" , "v0.3108" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3108" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v0.3113" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3113" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v0.3115" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3115" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v0.3117" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3117" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v0.3119" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3119" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v0.3120" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v0.3120" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v1.3204" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v1.3204" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v1.3303" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v1.3303" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v1.3308" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v1.3308" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v1.3310" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v1.3310" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810TZ" , "v1.3314" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1810T" , "v1.3314" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
/* Acer 5755G */
{"Acer" , "Aspire 5755G" , "V1.20" , 0 xab, 0 xb4, {0 x00, 0 x08}, 0 },
{"Acer" , "Aspire 5755G" , "V1.21" , 0 xab, 0 xb3, {0 x00, 0 x08}, 0 },
/* Acer 521 */
{"Acer" , "AO521" , "V1.11" , 0 x55, 0 x58, {0 x1f, 0 x00}, 0 },
/* Acer 531 */
{"Acer" , "AO531h" , "v0.3104" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AO531h" , "v0.3201" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Acer" , "AO531h" , "v0.3304" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
/* Acer 751 */
{"Acer" , "AO751h" , "V0.3206" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Acer" , "AO751h" , "V0.3212" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
/* Acer 753 */
{"Acer" , "Aspire One 753" , "V1.24" , 0 x93, 0 xac, {0 x14, 0 x04}, 1 },
/* Acer 1825 */
{"Acer" , "Aspire 1825PTZ" , "V1.3118" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Acer" , "Aspire 1825PTZ" , "V1.3127" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
/* Acer Extensa 5420 */
{"Acer" , "Extensa 5420" , "V1.17" , 0 x93, 0 xac, {0 x14, 0 x04}, 1 },
/* Acer Aspire 5315 */
{"Acer" , "Aspire 5315" , "V1.19" , 0 x93, 0 xac, {0 x14, 0 x04}, 1 },
/* Acer Aspire 5739 */
{"Acer" , "Aspire 5739G" , "V1.3311" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
/* Acer TravelMate 7730 */
{"Acer" , "TravelMate 7730G" , "v0.3509" , 0 x55, 0 x58, {0 xaf, 0 x00}, 0 },
/* Acer Aspire 7551 */
{"Acer" , "Aspire 7551" , "V1.18" , 0 x93, 0 xa8, {0 x14, 0 x04}, 1 },
/* Acer TravelMate TM8573T */
{"Acer" , "TM8573T" , "V1.13" , 0 x93, 0 xa8, {0 x14, 0 x04}, 1 },
/* Gateway */
{"Gateway" , "AOA110" , "v0.3103" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Gateway" , "AOA150" , "v0.3103" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Gateway" , "LT31" , "v1.3103" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Gateway" , "LT31" , "v1.3201" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Gateway" , "LT31" , "v1.3302" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Gateway" , "LT31" , "v1.3303t" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Gateway" , "LT31" , "v1.3307" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
/* Packard Bell */
{"Packard Bell" , "DOA150" , "v0.3104" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Packard Bell" , "DOA150" , "v0.3105" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Packard Bell" , "AOA110" , "v0.3105" , 0 x55, 0 x58, {0 x21, 0 x00}, 0 },
{"Packard Bell" , "AOA150" , "v0.3105" , 0 x55, 0 x58, {0 x20, 0 x00}, 0 },
{"Packard Bell" , "ENBFT" , "V1.3118" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "ENBFT" , "V1.3127" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v1.3303" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3120" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3108" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3113" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3115" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3117" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v0.3119" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMU" , "v1.3204" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMA" , "v1.3201" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMA" , "v1.3302" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTMA" , "v1.3303t" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
{"Packard Bell" , "DOTVR46" , "v1.3308" , 0 x55, 0 x58, {0 x9e, 0 x00}, 0 },
/* pewpew-terminator */
{"" , "" , "" , 0 , 0 , {0 , 0 }, 0 }
};
/*
* this struct is used to instruct thermal layer to use bang_bang instead of
* default governor for acerhdf
*/
static const struct thermal_zone_params acerhdf_zone_params = {
.governor_name = "bang_bang" ,
};
static int acerhdf_get_temp(int *temp)
{
u8 read_temp;
if (ec_read(ctrl_cfg.tempreg, &read_temp))
return -EINVAL;
*temp = read_temp * 1000 ;
return 0 ;
}
static int acerhdf_get_fanstate(int *state)
{
u8 fan;
if (ec_read(ctrl_cfg.fanreg, &fan))
return -EINVAL;
if (fan != ctrl_cfg.cmd.cmd_off)
*state = ACERHDF_FAN_AUTO;
else
*state = ACERHDF_FAN_OFF;
return 0 ;
}
static void acerhdf_change_fanstate(int state)
{
unsigned char cmd;
if (verbose)
pr_notice("fan %s\n" , state == ACERHDF_FAN_OFF ? "OFF" : "ON" );
if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
pr_err("invalid fan state %d requested, setting to auto!\n" ,
state);
state = ACERHDF_FAN_AUTO;
}
cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off
: ctrl_cfg.cmd.cmd_auto;
fanstate = state;
ec_write(ctrl_cfg.fanreg, cmd);
if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) {
if (verbose)
pr_notice("turning off fan manually\n" );
ec_write(mcmd.mreg, mcmd.moff);
}
}
static void acerhdf_check_param(struct thermal_zone_device *thermal)
{
if (fanon > ACERHDF_MAX_FANON) {
pr_err("fanon temperature too high, set to %d\n" ,
ACERHDF_MAX_FANON);
fanon = ACERHDF_MAX_FANON;
}
if (fanon < fanoff) {
pr_err("fanoff temperature (%d) is above fanon temperature (%d), clamping to %d\n" ,
fanoff, fanon, fanon);
fanoff = fanon;
}
trips[0 ].temperature = fanon;
trips[0 ].hysteresis = fanon - fanoff;
if (kernelmode) {
if (interval > ACERHDF_MAX_INTERVAL) {
pr_err("interval too high, set to %d\n" ,
ACERHDF_MAX_INTERVAL);
interval = ACERHDF_MAX_INTERVAL;
}
if (verbose)
pr_notice("interval changed to: %d\n" , interval);
}
}
/*
* This is the thermal zone callback which does the delayed polling of the fan
* state . We do check / sysfs - originating settings here in acerhdf_check_param ( )
* as late as the polling interval is since we can ' t do that in the respective
* accessors of the module parameters .
*/
static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t)
{
int temp, err = 0 ;
err = acerhdf_get_temp(&temp);
if (err)
return err;
if (verbose)
pr_notice("temp %d\n" , temp);
*t = temp;
return 0 ;
}
static bool acerhdf_should_bind(struct thermal_zone_device *thermal,
const struct thermal_trip *trip,
struct thermal_cooling_device *cdev,
struct cooling_spec *c)
{
/* if the cooling device is the one from acerhdf bind it */
return cdev == cl_dev && trip->type == THERMAL_TRIP_ACTIVE;
}
static inline void acerhdf_revert_to_bios_mode(void )
{
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
kernelmode = 0 ;
pr_notice("kernel mode fan control OFF\n" );
}
static inline void acerhdf_enable_kernelmode(void )
{
kernelmode = 1 ;
pr_notice("kernel mode fan control ON\n" );
}
/*
* set operation mode ;
* enabled : the thermal layer of the kernel takes care about
* the temperature and the fan .
* disabled : the BIOS takes control of the fan .
*/
static int acerhdf_change_mode(struct thermal_zone_device *thermal,
enum thermal_device_mode mode)
{
if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
acerhdf_revert_to_bios_mode();
else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
acerhdf_enable_kernelmode();
return 0 ;
}
static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
int *temperature)
{
*temperature = ACERHDF_TEMP_CRIT;
return 0 ;
}
/* bind callback functions to thermalzone */
static const struct thermal_zone_device_ops acerhdf_dev_ops = {
.should_bind = acerhdf_should_bind,
.get_temp = acerhdf_get_ec_temp,
.change_mode = acerhdf_change_mode,
.get_crit_temp = acerhdf_get_crit_temp,
};
/*
* cooling device callback functions
* get maximal fan cooling state
*/
static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
*state = 1 ;
return 0 ;
}
static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
int err = 0 , tmp;
err = acerhdf_get_fanstate(&tmp);
if (err)
return err;
*state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0 ;
return 0 ;
}
/* change current fan state - is overwritten when running in kernel mode */
static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
unsigned long state)
{
int cur_temp, cur_state, err = 0 ;
if (!kernelmode)
return 0 ;
err = acerhdf_get_temp(&cur_temp);
if (err) {
pr_err("error reading temperature, hand off control to BIOS\n" );
goto err_out;
}
err = acerhdf_get_fanstate(&cur_state);
if (err) {
pr_err("error reading fan state, hand off control to BIOS\n" );
goto err_out;
}
if (state == 0 ) {
if (cur_state == ACERHDF_FAN_AUTO)
acerhdf_change_fanstate(ACERHDF_FAN_OFF);
} else {
if (cur_state == ACERHDF_FAN_OFF)
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
}
return 0 ;
err_out:
acerhdf_revert_to_bios_mode();
return -EINVAL;
}
/* bind fan callbacks to fan device */
static const struct thermal_cooling_device_ops acerhdf_cooling_ops = {
.get_max_state = acerhdf_get_max_state,
.get_cur_state = acerhdf_get_cur_state,
.set_cur_state = acerhdf_set_cur_state,
};
/* suspend / resume functionality */
static int acerhdf_suspend(struct device *dev)
{
if (kernelmode)
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
if (verbose)
pr_notice("going suspend\n" );
return 0 ;
}
static int acerhdf_probe(struct platform_device *device)
{
return 0 ;
}
static const struct dev_pm_ops acerhdf_pm_ops = {
.suspend = acerhdf_suspend,
.freeze = acerhdf_suspend,
};
static struct platform_driver acerhdf_driver = {
.driver = {
.name = "acerhdf" ,
.pm = &acerhdf_pm_ops,
},
.probe = acerhdf_probe,
};
/* check hardware */
static int __init acerhdf_check_hardware(void )
{
char const *vendor, *version, *product;
const struct bios_settings *bt = NULL;
int found = 0 ;
/* get BIOS data */
vendor = dmi_get_system_info(DMI_SYS_VENDOR);
version = dmi_get_system_info(DMI_BIOS_VERSION);
product = dmi_get_system_info(DMI_PRODUCT_NAME);
if (!vendor || !version || !product) {
pr_err("error getting hardware information\n" );
return -EINVAL;
}
pr_info("Acer Aspire One Fan driver, v.%s\n" , DRV_VER);
if (list_supported) {
pr_info("List of supported Manufacturer/Model/BIOS:\n" );
pr_info("---------------------------------------------------\n" );
for (bt = bios_tbl; bt->vendor[0 ]; bt++) {
pr_info("%-13s | %-17s | %-10s\n" , bt->vendor,
bt->product, bt->version);
}
pr_info("---------------------------------------------------\n" );
return -ECANCELED;
}
if (force_bios[0 ]) {
version = force_bios;
pr_info("forcing BIOS version: %s\n" , version);
kernelmode = 0 ;
}
if (force_product[0 ]) {
product = force_product;
pr_info("forcing BIOS product: %s\n" , product);
kernelmode = 0 ;
}
if (verbose)
pr_info("BIOS info: %s %s, product: %s\n" ,
vendor, version, product);
/* search BIOS version and vendor in BIOS settings table */
for (bt = bios_tbl; bt->vendor[0 ]; bt++) {
/*
* check if actual hardware BIOS vendor , product and version
* IDs start with the strings of BIOS table entry
*/
if (strstarts(vendor, bt->vendor) &&
strstarts(product, bt->product) &&
strstarts(version, bt->version)) {
found = 1 ;
break ;
}
}
if (!found) {
pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n" ,
vendor, product, version);
return -EINVAL;
}
/* Copy control settings from BIOS table before we free it. */
ctrl_cfg.fanreg = bt->fanreg;
ctrl_cfg.tempreg = bt->tempreg;
memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof (struct fancmd));
ctrl_cfg.mcmd_enable = bt->mcmd_enable;
/*
* if started with kernel mode off , prevent the kernel from switching
* off the fan
*/
if (!kernelmode) {
pr_notice("Fan control off, to enable do:\n" );
pr_notice("echo -n \" enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n" );
}
return 0 ;
}
static int __init acerhdf_register_platform(void )
{
int err = 0 ;
err = platform_driver_register(&acerhdf_driver);
if (err)
return err;
acerhdf_dev = platform_device_alloc("acerhdf" , PLATFORM_DEVID_NONE);
if (!acerhdf_dev) {
err = -ENOMEM;
goto err_device_alloc;
}
err = platform_device_add(acerhdf_dev);
if (err)
goto err_device_add;
return 0 ;
err_device_add:
platform_device_put(acerhdf_dev);
err_device_alloc:
platform_driver_unregister(&acerhdf_driver);
return err;
}
static void acerhdf_unregister_platform(void )
{
platform_device_unregister(acerhdf_dev);
platform_driver_unregister(&acerhdf_driver);
}
static int __init acerhdf_register_thermal(void )
{
int ret;
cl_dev = thermal_cooling_device_register("acerhdf-fan" , NULL,
&acerhdf_cooling_ops);
if (IS_ERR(cl_dev))
return -EINVAL;
thz_dev = thermal_zone_device_register_with_trips("acerhdf" , trips, ARRAY_SIZE(trips),
NULL, &acerhdf_dev_ops,
&acerhdf_zone_params, 0 ,
(kernelmode) ? interval*1000 : 0 );
if (IS_ERR(thz_dev))
return -EINVAL;
if (kernelmode)
ret = thermal_zone_device_enable(thz_dev);
else
ret = thermal_zone_device_disable(thz_dev);
if (ret)
return ret;
return 0 ;
}
static void acerhdf_unregister_thermal(void )
{
if (cl_dev) {
thermal_cooling_device_unregister(cl_dev);
cl_dev = NULL;
}
if (thz_dev) {
thermal_zone_device_unregister(thz_dev);
thz_dev = NULL;
}
}
static int __init acerhdf_init(void )
{
int err = 0 ;
err = acerhdf_check_hardware();
if (err)
goto out_err;
err = acerhdf_register_platform();
if (err)
goto out_err;
err = acerhdf_register_thermal();
if (err)
goto err_unreg;
return 0 ;
err_unreg:
acerhdf_unregister_thermal();
acerhdf_unregister_platform();
out_err:
return err;
}
static void __exit acerhdf_exit(void )
{
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
acerhdf_unregister_thermal();
acerhdf_unregister_platform();
}
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("Peter Kaestle" );
MODULE_DESCRIPTION("Aspire One temperature and fan driver" );
MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:" );
MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:" );
MODULE_ALIAS("dmi:*:*Acer*:pnAspire*7551:" );
MODULE_ALIAS("dmi:*:*Acer*:TM8573T:" );
MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:" );
MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:" );
MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:" );
MODULE_ALIAS("dmi:*:*Acer*:pnExtensa*5420*:" );
module_init(acerhdf_init);
module_exit(acerhdf_exit);
static int interval_set_uint(const char *val, const struct kernel_param *kp)
{
int ret;
ret = param_set_uint(val, kp);
if (ret)
return ret;
acerhdf_check_param(thz_dev);
return 0 ;
}
static const struct kernel_param_ops interval_ops = {
.set = interval_set_uint,
.get = param_get_uint,
};
module_param_cb(interval, &interval_ops, &interval, 0000 );
MODULE_PARM_DESC(interval, "Polling interval of temperature check" );
Messung V0.5 in Prozent C=94 H=94 G=93
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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