806 lines
24 KiB
C
806 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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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 Kaestle peter (a) piie.net
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* https://piie.net
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* 2009 Borislav Petkov bp (a) alien8.de
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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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#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/dmi.h>
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#include <linux/acpi.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 "0.7.0"
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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_DEFAULT_TEMP_FANON 60000
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#define ACERHDF_DEFAULT_TEMP_FANOFF 53000
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#define ACERHDF_TEMP_CRIT 89000
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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 80000
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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 = ACERHDF_DEFAULT_TEMP_FANON;
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static unsigned int fanoff = ACERHDF_DEFAULT_TEMP_FANOFF;
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static unsigned int verbose;
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static unsigned int list_supported;
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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 char force_product[16];
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static unsigned int prev_interval;
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static struct thermal_zone_device *thz_dev;
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static struct thermal_cooling_device *cl_dev;
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static 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(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(list_supported, uint, 0600);
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MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions");
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module_param_string(force_bios, force_bios, 16, 0);
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MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version");
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module_param_string(force_product, force_product, 16, 0);
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MODULE_PARM_DESC(force_product, "Pretend system is this known supported model");
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/*
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* cmd_off: to switch the fan completely off and check if the fan is off
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* cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then
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* the fan speed depending on the temperature
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*/
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struct fancmd {
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u8 cmd_off;
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u8 cmd_auto;
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};
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struct manualcmd {
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u8 mreg;
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u8 moff;
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};
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/* default register and command to disable fan in manual mode */
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static const struct manualcmd mcmd = {
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.mreg = 0x94,
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.moff = 0xff,
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};
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/* BIOS settings - only used during probe */
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struct bios_settings {
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const char *vendor;
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const char *product;
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const char *version;
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u8 fanreg;
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u8 tempreg;
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struct fancmd cmd;
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int mcmd_enable;
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};
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/* This could be a daughter struct in the above, but not worth the redirect */
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struct ctrl_settings {
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u8 fanreg;
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u8 tempreg;
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struct fancmd cmd;
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int mcmd_enable;
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};
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static struct thermal_trip trips[] = {
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[0] = { .temperature = ACERHDF_DEFAULT_TEMP_FANON,
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.hysteresis = ACERHDF_DEFAULT_TEMP_FANON - ACERHDF_DEFAULT_TEMP_FANOFF,
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.type = THERMAL_TRIP_ACTIVE },
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[1] = { .temperature = ACERHDF_TEMP_CRIT,
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.type = THERMAL_TRIP_CRITICAL }
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};
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static struct ctrl_settings ctrl_cfg __read_mostly;
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/* Register addresses and values for different BIOS versions */
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static const struct bios_settings bios_tbl[] __initconst = {
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/* AOA110 */
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{"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0},
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{"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
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{"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0},
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{"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0},
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{"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0},
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{"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0},
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{"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0},
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/* AOA150 */
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{"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
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{"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
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/* LT1005u */
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{"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
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/* Acer 1410 */
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{"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
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/* Acer 1810xx */
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{"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
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/* Acer 5755G */
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{"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0},
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{"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0},
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/* Acer 521 */
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{"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0},
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/* Acer 531 */
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{"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
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/* Acer 751 */
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{"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0},
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/* Acer 753 */
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{"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1},
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/* Acer 1825 */
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{"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
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/* Acer Extensa 5420 */
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{"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1},
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/* Acer Aspire 5315 */
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{"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1},
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/* Acer Aspire 5739 */
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{"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0},
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/* Acer TravelMate 7730 */
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{"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0},
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/* Acer Aspire 7551 */
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{"Acer", "Aspire 7551", "V1.18", 0x93, 0xa8, {0x14, 0x04}, 1},
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/* Acer TravelMate TM8573T */
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{"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1},
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/* Gateway */
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{"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0},
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/* Packard Bell */
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{"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0},
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{"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
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{"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
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{"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
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/* pewpew-terminator */
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{"", "", "", 0, 0, {0, 0}, 0}
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};
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/*
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* this struct is used to instruct thermal layer to use bang_bang instead of
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* default governor for acerhdf
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*/
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static struct thermal_zone_params acerhdf_zone_params = {
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.governor_name = "bang_bang",
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};
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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(ctrl_cfg.tempreg, &read_temp))
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return -EINVAL;
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*temp = read_temp * 1000;
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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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if (ec_read(ctrl_cfg.fanreg, &fan))
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return -EINVAL;
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if (fan != ctrl_cfg.cmd.cmd_off)
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*state = ACERHDF_FAN_AUTO;
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else
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*state = ACERHDF_FAN_OFF;
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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 ? "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 = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off
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: ctrl_cfg.cmd.cmd_auto;
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fanstate = state;
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ec_write(ctrl_cfg.fanreg, cmd);
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if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) {
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if (verbose)
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pr_notice("turning off fan manually\n");
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ec_write(mcmd.mreg, mcmd.moff);
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}
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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 (fanon < fanoff) {
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pr_err("fanoff temperature (%d) is above fanon temperature (%d), clamping to %d\n",
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|
fanoff, fanon, fanon);
|
|
fanoff = fanon;
|
|
};
|
|
|
|
trips[0].temperature = fanon;
|
|
trips[0].hysteresis = fanon - fanoff;
|
|
|
|
if (kernelmode && prev_interval != interval) {
|
|
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);
|
|
|
|
if (thermal)
|
|
thermal->polling_delay_jiffies =
|
|
round_jiffies(msecs_to_jiffies(interval * 1000));
|
|
|
|
prev_interval = 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 int acerhdf_bind(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
/* if the cooling device is the one from acerhdf bind it */
|
|
if (cdev != cl_dev)
|
|
return 0;
|
|
|
|
if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
|
|
THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
|
|
THERMAL_WEIGHT_DEFAULT)) {
|
|
pr_err("error binding cooling dev\n");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acerhdf_unbind(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
if (cdev != cl_dev)
|
|
return 0;
|
|
|
|
if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
|
|
pr_err("error unbinding cooling dev\n");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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 struct thermal_zone_device_ops acerhdf_dev_ops = {
|
|
.bind = acerhdf_bind,
|
|
.unbind = acerhdf_unbind,
|
|
.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),
|
|
0, 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;
|
|
|
|
if (strcmp(thz_dev->governor->name,
|
|
acerhdf_zone_params.governor_name)) {
|
|
pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n",
|
|
acerhdf_zone_params.governor_name);
|
|
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 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, 0600);
|
|
MODULE_PARM_DESC(interval, "Polling interval of temperature check");
|