acerhdf: Acer Aspire One fan control
Acerhdf is a driver for Acer Aspire One netbooks. It allows to access the temperature sensor and to control the fan. Signed-off-by: Peter Feuerer <peter@piie.net> Signed-off-by: Andreas Mohr <andi@lisas.de> Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Peter Feuerer
Len Brown
parent
07a2039b8e
commit
e86435eb91
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@ -222,6 +222,13 @@ L: linux-acenic@sunsite.dk
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S: Maintained
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F: drivers/net/acenic*
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ACER ASPIRE ONE TEMPERATURE AND FAN DRIVER
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P: Peter Feuerer
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M: peter@piie.net
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W: http://piie.net/?section=acerhdf
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S: Maintained
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F: drivers/platform/x86/acerhdf.c
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ACER WMI LAPTOP EXTRAS
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P: Carlos Corbacho
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M: carlos@strangeworlds.co.uk
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@ -34,6 +34,23 @@ config ACER_WMI
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If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
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here.
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config ACERHDF
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tristate "Acer Aspire One temperature and fan driver"
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depends on THERMAL && THERMAL_HWMON && ACPI
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---help---
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This is a driver for Acer Aspire One netbooks. It allows to access
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the temperature sensor and to control the fan.
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After loading this driver the BIOS is still in control of the fan.
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To let the kernel handle the fan, do:
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echo -n enabled > /sys/class/thermal/thermal_zone0/mode
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For more information about this driver see
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<http://piie.net/files/acerhdf_README.txt>
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If you have an Acer Aspire One netbook, say Y or M
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here.
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config ASUS_LAPTOP
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tristate "Asus Laptop Extras (EXPERIMENTAL)"
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depends on ACPI
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@ -9,6 +9,7 @@ obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o
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obj-$(CONFIG_DELL_LAPTOP) += dell-laptop.o
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obj-$(CONFIG_DELL_WMI) += dell-wmi.o
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obj-$(CONFIG_ACER_WMI) += acer-wmi.o
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obj-$(CONFIG_ACERHDF) += acerhdf.o
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obj-$(CONFIG_HP_WMI) += hp-wmi.o
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obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
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obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
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@ -0,0 +1,602 @@
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/*
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* acerhdf - A driver which monitors the temperature
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* of the aspire one netbook, turns on/off the fan
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* as soon as the upper/lower threshold is reached.
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*
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* (C) 2009 - Peter Feuerer peter (a) piie.net
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* http://piie.net
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* 2009 Borislav Petkov <petkovbb@gmail.com>
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*
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* Inspired by and many thanks to:
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* o acerfand - Rachel Greenham
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* o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com
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* - Petr Tomasek tomasek (#) etf,cuni,cz
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* - Carlos Corbacho cathectic (at) gmail.com
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* o lkml - Matthew Garrett
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* - Borislav Petkov
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* - Andreas Mohr
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define pr_fmt(fmt) "acerhdf: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/dmi.h>
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#include <acpi/acpi_drivers.h>
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#include <linux/sched.h>
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#include <linux/thermal.h>
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#include <linux/platform_device.h>
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/*
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* The driver is started with "kernel mode off" by default. That means, the BIOS
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* is still in control of the fan. In this mode the driver allows to read the
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* temperature of the cpu and a userspace tool may take over control of the fan.
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* If the driver is switched to "kernel mode" (e.g. via module parameter) the
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* driver is in full control of the fan. If you want the module to be started in
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* kernel mode by default, define the following:
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*/
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#undef START_IN_KERNEL_MODE
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#define DRV_VER "0.5.13"
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/*
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* According to the Atom N270 datasheet,
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* (http://download.intel.com/design/processor/datashts/320032.pdf) the
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* CPU's optimal operating limits denoted in junction temperature as
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* measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,
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* assume 89°C is critical temperature.
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*/
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#define ACERHDF_TEMP_CRIT 89
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#define ACERHDF_FAN_OFF 0
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#define ACERHDF_FAN_AUTO 1
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/*
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* No matter what value the user puts into the fanon variable, turn on the fan
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* at 80 degree Celsius to prevent hardware damage
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*/
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#define ACERHDF_MAX_FANON 80
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/*
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* Maximum interval between two temperature checks is 15 seconds, as the die
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* can get hot really fast under heavy load (plus we shouldn't forget about
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* possible impact of _external_ aggressive sources such as heaters, sun etc.)
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*/
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#define ACERHDF_MAX_INTERVAL 15
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#ifdef START_IN_KERNEL_MODE
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static int kernelmode = 1;
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#else
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static int kernelmode;
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#endif
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static unsigned int interval = 10;
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static unsigned int fanon = 63;
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static unsigned int fanoff = 58;
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static unsigned int verbose;
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static unsigned int fanstate = ACERHDF_FAN_AUTO;
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static char force_bios[16];
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static unsigned int prev_interval;
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struct thermal_zone_device *thz_dev;
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struct thermal_cooling_device *cl_dev;
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struct platform_device *acerhdf_dev;
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module_param(kernelmode, uint, 0);
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MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");
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module_param(interval, uint, 0600);
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MODULE_PARM_DESC(interval, "Polling interval of temperature check");
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module_param(fanon, uint, 0600);
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MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");
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module_param(fanoff, uint, 0600);
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MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature");
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module_param(verbose, uint, 0600);
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MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
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module_param_string(force_bios, force_bios, 16, 0);
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MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check");
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/* BIOS settings */
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struct bios_settings_t {
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const char *vendor;
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const char *version;
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unsigned char fanreg;
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unsigned char tempreg;
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unsigned char fancmd[2]; /* fan off and auto commands */
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};
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/* Register addresses and values for different BIOS versions */
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static const struct bios_settings_t bios_tbl[] = {
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{"Acer", "v0.3109", 0x55, 0x58, {0x1f, 0x00} },
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{"Acer", "v0.3114", 0x55, 0x58, {0x1f, 0x00} },
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{"Acer", "v0.3301", 0x55, 0x58, {0xaf, 0x00} },
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{"Acer", "v0.3304", 0x55, 0x58, {0xaf, 0x00} },
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{"Acer", "v0.3305", 0x55, 0x58, {0xaf, 0x00} },
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{"Acer", "v0.3308", 0x55, 0x58, {0x21, 0x00} },
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{"Acer", "v0.3309", 0x55, 0x58, {0x21, 0x00} },
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{"Acer", "v0.3310", 0x55, 0x58, {0x21, 0x00} },
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{"Gateway", "v0.3103", 0x55, 0x58, {0x21, 0x00} },
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{"Packard Bell", "v0.3105", 0x55, 0x58, {0x21, 0x00} },
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{"", "", 0, 0, {0, 0} }
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};
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static const struct bios_settings_t *bios_cfg __read_mostly;
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static int acerhdf_get_temp(int *temp)
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{
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u8 read_temp;
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if (ec_read(bios_cfg->tempreg, &read_temp))
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return -EINVAL;
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*temp = read_temp;
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return 0;
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}
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static int acerhdf_get_fanstate(int *state)
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{
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u8 fan;
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bool tmp;
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if (ec_read(bios_cfg->fanreg, &fan))
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return -EINVAL;
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tmp = (fan == bios_cfg->fancmd[ACERHDF_FAN_OFF]);
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*state = tmp ? ACERHDF_FAN_OFF : ACERHDF_FAN_AUTO;
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return 0;
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}
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static void acerhdf_change_fanstate(int state)
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{
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unsigned char cmd;
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if (verbose)
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pr_notice("fan %s\n", (state == ACERHDF_FAN_OFF) ?
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"OFF" : "ON");
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if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
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pr_err("invalid fan state %d requested, setting to auto!\n",
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state);
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state = ACERHDF_FAN_AUTO;
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}
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cmd = bios_cfg->fancmd[state];
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fanstate = state;
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ec_write(bios_cfg->fanreg, cmd);
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}
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static void acerhdf_check_param(struct thermal_zone_device *thermal)
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{
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if (fanon > ACERHDF_MAX_FANON) {
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pr_err("fanon temperature too high, set to %d\n",
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ACERHDF_MAX_FANON);
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fanon = ACERHDF_MAX_FANON;
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}
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if (kernelmode && prev_interval != interval) {
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if (interval > ACERHDF_MAX_INTERVAL) {
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pr_err("interval too high, set to %d\n",
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ACERHDF_MAX_INTERVAL);
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interval = ACERHDF_MAX_INTERVAL;
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}
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if (verbose)
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pr_notice("interval changed to: %d\n",
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interval);
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thermal->polling_delay = interval*1000;
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prev_interval = interval;
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}
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}
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/*
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* This is the thermal zone callback which does the delayed polling of the fan
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* state. We do check /sysfs-originating settings here in acerhdf_check_param()
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* as late as the polling interval is since we can't do that in the respective
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* accessors of the module parameters.
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*/
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static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
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unsigned long *t)
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{
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int temp, err = 0;
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acerhdf_check_param(thermal);
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err = acerhdf_get_temp(&temp);
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if (err)
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return err;
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if (verbose)
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pr_notice("temp %d\n", temp);
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*t = temp;
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return 0;
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}
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static int acerhdf_bind(struct thermal_zone_device *thermal,
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struct thermal_cooling_device *cdev)
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{
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/* if the cooling device is the one from acerhdf bind it */
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if (cdev != cl_dev)
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return 0;
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if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
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pr_err("error binding cooling dev\n");
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return -EINVAL;
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}
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return 0;
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}
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static int acerhdf_unbind(struct thermal_zone_device *thermal,
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struct thermal_cooling_device *cdev)
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{
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if (cdev != cl_dev)
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return 0;
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if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
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pr_err("error unbinding cooling dev\n");
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return -EINVAL;
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}
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return 0;
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}
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static inline void acerhdf_revert_to_bios_mode(void)
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{
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acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
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kernelmode = 0;
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if (thz_dev)
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thz_dev->polling_delay = 0;
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pr_notice("kernel mode fan control OFF\n");
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}
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static inline void acerhdf_enable_kernelmode(void)
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{
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kernelmode = 1;
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thz_dev->polling_delay = interval*1000;
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thermal_zone_device_update(thz_dev);
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pr_notice("kernel mode fan control ON\n");
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}
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static int acerhdf_get_mode(struct thermal_zone_device *thermal,
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enum thermal_device_mode *mode)
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{
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if (verbose)
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pr_notice("kernel mode fan control %d\n", kernelmode);
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*mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
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: THERMAL_DEVICE_DISABLED;
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return 0;
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}
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/*
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* set operation mode;
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* enabled: the thermal layer of the kernel takes care about
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* the temperature and the fan.
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* disabled: the BIOS takes control of the fan.
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*/
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static int acerhdf_set_mode(struct thermal_zone_device *thermal,
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enum thermal_device_mode mode)
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{
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if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
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acerhdf_revert_to_bios_mode();
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else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
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acerhdf_enable_kernelmode();
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return 0;
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}
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static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
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enum thermal_trip_type *type)
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{
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if (trip == 0)
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*type = THERMAL_TRIP_ACTIVE;
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return 0;
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}
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static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
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unsigned long *temp)
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{
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if (trip == 0)
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*temp = fanon;
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return 0;
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}
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static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
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unsigned long *temperature)
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{
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*temperature = ACERHDF_TEMP_CRIT;
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return 0;
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}
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/* bind callback functions to thermalzone */
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struct thermal_zone_device_ops acerhdf_dev_ops = {
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.bind = acerhdf_bind,
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.unbind = acerhdf_unbind,
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.get_temp = acerhdf_get_ec_temp,
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.get_mode = acerhdf_get_mode,
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.set_mode = acerhdf_set_mode,
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.get_trip_type = acerhdf_get_trip_type,
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.get_trip_temp = acerhdf_get_trip_temp,
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.get_crit_temp = acerhdf_get_crit_temp,
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};
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/*
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* cooling device callback functions
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* get maximal fan cooling state
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*/
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static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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*state = 1;
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return 0;
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}
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static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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int err = 0, tmp;
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err = acerhdf_get_fanstate(&tmp);
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if (err)
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return err;
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*state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
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return 0;
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}
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/* change current fan state - is overwritten when running in kernel mode */
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static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
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unsigned long state)
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{
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int cur_temp, cur_state, err = 0;
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if (!kernelmode)
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return 0;
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err = acerhdf_get_temp(&cur_temp);
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if (err) {
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pr_err("error reading temperature, hand off control to BIOS\n");
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goto err_out;
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}
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err = acerhdf_get_fanstate(&cur_state);
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if (err) {
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pr_err("error reading fan state, hand off control to BIOS\n");
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goto err_out;
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}
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if (state == 0) {
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/* turn fan off only if below fanoff temperature */
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if ((cur_state == ACERHDF_FAN_AUTO) &&
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(cur_temp < fanoff))
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acerhdf_change_fanstate(ACERHDF_FAN_OFF);
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} else {
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if (cur_state == ACERHDF_FAN_OFF)
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acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
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}
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return 0;
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err_out:
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acerhdf_revert_to_bios_mode();
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return -EINVAL;
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}
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/* bind fan callbacks to fan device */
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struct thermal_cooling_device_ops acerhdf_cooling_ops = {
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.get_max_state = acerhdf_get_max_state,
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.get_cur_state = acerhdf_get_cur_state,
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.set_cur_state = acerhdf_set_cur_state,
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};
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/* suspend / resume functionality */
|
||||
static int acerhdf_suspend(struct platform_device *dev, pm_message_t state)
|
||||
{
|
||||
if (kernelmode)
|
||||
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
|
||||
|
||||
if (verbose)
|
||||
pr_notice("going suspend\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int acerhdf_resume(struct platform_device *device)
|
||||
{
|
||||
if (verbose)
|
||||
pr_notice("resuming\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit acerhdf_probe(struct platform_device *device)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int acerhdf_remove(struct platform_device *device)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct platform_driver acerhdf_drv = {
|
||||
.driver = {
|
||||
.name = "acerhdf",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = acerhdf_probe,
|
||||
.remove = acerhdf_remove,
|
||||
.suspend = acerhdf_suspend,
|
||||
.resume = acerhdf_resume,
|
||||
};
|
||||
|
||||
|
||||
/* check hardware */
|
||||
static int acerhdf_check_hardware(void)
|
||||
{
|
||||
char const *vendor, *version, *product;
|
||||
int i;
|
||||
|
||||
/* 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);
|
||||
|
||||
pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
|
||||
|
||||
if (!force_bios[0]) {
|
||||
if (strncmp(product, "AO", 2)) {
|
||||
pr_err("no Aspire One hardware found\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
} else {
|
||||
pr_info("forcing BIOS version: %s\n", version);
|
||||
version = force_bios;
|
||||
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 (i = 0; bios_tbl[i].version[0]; i++) {
|
||||
if (!strcmp(bios_tbl[i].vendor, vendor) &&
|
||||
!strcmp(bios_tbl[i].version, version)) {
|
||||
bios_cfg = &bios_tbl[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!bios_cfg) {
|
||||
pr_err("unknown (unsupported) BIOS version %s/%s, "
|
||||
"please report, aborting!\n", vendor, version);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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_zone0/mode\n");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int acerhdf_register_platform(void)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
err = platform_driver_register(&acerhdf_drv);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
acerhdf_dev = platform_device_alloc("acerhdf", -1);
|
||||
platform_device_add(acerhdf_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void acerhdf_unregister_platform(void)
|
||||
{
|
||||
if (!acerhdf_dev)
|
||||
return;
|
||||
|
||||
platform_device_del(acerhdf_dev);
|
||||
platform_driver_unregister(&acerhdf_drv);
|
||||
}
|
||||
|
||||
static int acerhdf_register_thermal(void)
|
||||
{
|
||||
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("acerhdf", 1, NULL,
|
||||
&acerhdf_dev_ops, 0, 0, 0,
|
||||
(kernelmode) ? interval*1000 : 0);
|
||||
if (IS_ERR(thz_dev))
|
||||
return -EINVAL;
|
||||
|
||||
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 err_unreg;
|
||||
|
||||
err = acerhdf_register_thermal();
|
||||
if (err)
|
||||
goto err_unreg;
|
||||
|
||||
return 0;
|
||||
|
||||
err_unreg:
|
||||
acerhdf_unregister_thermal();
|
||||
acerhdf_unregister_platform();
|
||||
|
||||
out_err:
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
static void __exit acerhdf_exit(void)
|
||||
{
|
||||
acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
|
||||
acerhdf_unregister_thermal();
|
||||
acerhdf_unregister_platform();
|
||||
}
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Peter Feuerer");
|
||||
MODULE_DESCRIPTION("Aspire One temperature and fan driver");
|
||||
MODULE_ALIAS("dmi:*:*Acer*:*:");
|
||||
MODULE_ALIAS("dmi:*:*Gateway*:*:");
|
||||
MODULE_ALIAS("dmi:*:*Packard Bell*:*:");
|
||||
|
||||
module_init(acerhdf_init);
|
||||
module_exit(acerhdf_exit);
|
||||
Reference in New Issue