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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * acerhdf - A driver which monitors the temperature4 * of the aspire one netbook, turns on/off the fan5 * as soon as the upper/lower threshold is reached.6 *7 * (C) 2009 - Peter Kaestle peter (a) piie.net8 * https://piie.net9 * 2009 Borislav Petkov bp (a) alien8.de10 *11 * Inspired by and many thanks to:12 * o acerfand - Rachel Greenham13 * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com14 * - Petr Tomasek tomasek (#) etf,cuni,cz15 * - Carlos Corbacho cathectic (at) gmail.com16 * o lkml - Matthew Garrett17 * - Borislav Petkov18 * - Andreas Mohr19 */20 21#define pr_fmt(fmt) "acerhdf: " fmt22 23#include <linux/kernel.h>24#include <linux/module.h>25#include <linux/dmi.h>26#include <linux/acpi.h>27#include <linux/thermal.h>28#include <linux/platform_device.h>29 30/*31 * The driver is started with "kernel mode off" by default. That means, the BIOS32 * is still in control of the fan. In this mode the driver allows to read the33 * temperature of the cpu and a userspace tool may take over control of the fan.34 * If the driver is switched to "kernel mode" (e.g. via module parameter) the35 * driver is in full control of the fan. If you want the module to be started in36 * kernel mode by default, define the following:37 */38#undef START_IN_KERNEL_MODE39 40#define DRV_VER "0.7.0"41 42/*43 * According to the Atom N270 datasheet,44 * (http://download.intel.com/design/processor/datashts/320032.pdf) the45 * CPU's optimal operating limits denoted in junction temperature as46 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,47 * assume 89°C is critical temperature.48 */49#define ACERHDF_DEFAULT_TEMP_FANON 6000050#define ACERHDF_DEFAULT_TEMP_FANOFF 5300051#define ACERHDF_TEMP_CRIT 8900052#define ACERHDF_FAN_OFF 053#define ACERHDF_FAN_AUTO 154 55/*56 * No matter what value the user puts into the fanon variable, turn on the fan57 * at 80 degree Celsius to prevent hardware damage58 */59#define ACERHDF_MAX_FANON 8000060 61/*62 * Maximum interval between two temperature checks is 15 seconds, as the die63 * can get hot really fast under heavy load (plus we shouldn't forget about64 * possible impact of _external_ aggressive sources such as heaters, sun etc.)65 */66#define ACERHDF_MAX_INTERVAL 1567 68#ifdef START_IN_KERNEL_MODE69static int kernelmode = 1;70#else71static int kernelmode;72#endif73 74static unsigned int interval = 10;75static unsigned int fanon = ACERHDF_DEFAULT_TEMP_FANON;76static unsigned int fanoff = ACERHDF_DEFAULT_TEMP_FANOFF;77static unsigned int verbose;78static unsigned int list_supported;79static unsigned int fanstate = ACERHDF_FAN_AUTO;80static char force_bios[16];81static char force_product[16];82static struct thermal_zone_device *thz_dev;83static struct thermal_cooling_device *cl_dev;84static struct platform_device *acerhdf_dev;85 86module_param(kernelmode, uint, 0);87MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");88module_param(fanon, uint, 0600);89MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");90module_param(fanoff, uint, 0600);91MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature");92module_param(verbose, uint, 0600);93MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");94module_param(list_supported, uint, 0600);95MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions");96module_param_string(force_bios, force_bios, 16, 0);97MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version");98module_param_string(force_product, force_product, 16, 0);99MODULE_PARM_DESC(force_product, "Pretend system is this known supported model");100 101/*102 * cmd_off: to switch the fan completely off and check if the fan is off103 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then104 * the fan speed depending on the temperature105 */106struct fancmd {107 u8 cmd_off;108 u8 cmd_auto;109};110 111struct manualcmd {112 u8 mreg;113 u8 moff;114};115 116/* default register and command to disable fan in manual mode */117static const struct manualcmd mcmd = {118 .mreg = 0x94,119 .moff = 0xff,120};121 122/* BIOS settings - only used during probe */123struct bios_settings {124 const char *vendor;125 const char *product;126 const char *version;127 u8 fanreg;128 u8 tempreg;129 struct fancmd cmd;130 int mcmd_enable;131};132 133/* This could be a daughter struct in the above, but not worth the redirect */134struct ctrl_settings {135 u8 fanreg;136 u8 tempreg;137 struct fancmd cmd;138 int mcmd_enable;139};140 141static struct thermal_trip trips[] = {142 [0] = { .temperature = ACERHDF_DEFAULT_TEMP_FANON,143 .hysteresis = ACERHDF_DEFAULT_TEMP_FANON - ACERHDF_DEFAULT_TEMP_FANOFF,144 .type = THERMAL_TRIP_ACTIVE },145 146 [1] = { .temperature = ACERHDF_TEMP_CRIT,147 .type = THERMAL_TRIP_CRITICAL }148};149 150static struct ctrl_settings ctrl_cfg __read_mostly;151 152/* Register addresses and values for different BIOS versions */153static const struct bios_settings bios_tbl[] __initconst = {154 /* AOA110 */155 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0},156 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},157 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0},158 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0},159 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0},160 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0},161 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0},162 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0},163 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0},164 /* AOA150 */165 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},166 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0},167 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},168 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0},169 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0},170 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0},171 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0},172 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},173 /* LT1005u */174 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},175 /* Acer 1410 */176 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},177 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},178 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},179 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},180 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},181 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},182 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},183 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},184 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},185 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},186 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},187 /* Acer 1810xx */188 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},189 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},190 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},191 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},192 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},193 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},194 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},195 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},196 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},197 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},198 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},199 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},200 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},201 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},202 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},203 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},204 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},205 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},206 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},207 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},208 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},209 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},210 /* Acer 5755G */211 {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0},212 {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0},213 /* Acer 521 */214 {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0},215 /* Acer 531 */216 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0},217 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0},218 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},219 /* Acer 751 */220 {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0},221 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0},222 /* Acer 753 */223 {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1},224 /* Acer 1825 */225 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},226 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},227 /* Acer Extensa 5420 */228 {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1},229 /* Acer Aspire 5315 */230 {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1},231 /* Acer Aspire 5739 */232 {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0},233 /* Acer TravelMate 7730 */234 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0},235 /* Acer Aspire 7551 */236 {"Acer", "Aspire 7551", "V1.18", 0x93, 0xa8, {0x14, 0x04}, 1},237 /* Acer TravelMate TM8573T */238 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1},239 /* Gateway */240 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0},241 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0},242 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0},243 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},244 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},245 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},246 {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0},247 /* Packard Bell */248 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0},249 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},250 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0},251 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},252 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},253 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},254 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},255 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},256 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},257 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},258 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},259 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},260 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},261 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},262 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},263 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},264 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},265 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},266 /* pewpew-terminator */267 {"", "", "", 0, 0, {0, 0}, 0}268};269 270/*271 * this struct is used to instruct thermal layer to use bang_bang instead of272 * default governor for acerhdf273 */274static struct thermal_zone_params acerhdf_zone_params = {275 .governor_name = "bang_bang",276};277 278static int acerhdf_get_temp(int *temp)279{280 u8 read_temp;281 282 if (ec_read(ctrl_cfg.tempreg, &read_temp))283 return -EINVAL;284 285 *temp = read_temp * 1000;286 287 return 0;288}289 290static int acerhdf_get_fanstate(int *state)291{292 u8 fan;293 294 if (ec_read(ctrl_cfg.fanreg, &fan))295 return -EINVAL;296 297 if (fan != ctrl_cfg.cmd.cmd_off)298 *state = ACERHDF_FAN_AUTO;299 else300 *state = ACERHDF_FAN_OFF;301 302 return 0;303}304 305static void acerhdf_change_fanstate(int state)306{307 unsigned char cmd;308 309 if (verbose)310 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON");311 312 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {313 pr_err("invalid fan state %d requested, setting to auto!\n",314 state);315 state = ACERHDF_FAN_AUTO;316 }317 318 cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off319 : ctrl_cfg.cmd.cmd_auto;320 fanstate = state;321 322 ec_write(ctrl_cfg.fanreg, cmd);323 324 if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) {325 if (verbose)326 pr_notice("turning off fan manually\n");327 ec_write(mcmd.mreg, mcmd.moff);328 }329}330 331static void acerhdf_check_param(struct thermal_zone_device *thermal)332{333 if (fanon > ACERHDF_MAX_FANON) {334 pr_err("fanon temperature too high, set to %d\n",335 ACERHDF_MAX_FANON);336 fanon = ACERHDF_MAX_FANON;337 }338 339 if (fanon < fanoff) {340 pr_err("fanoff temperature (%d) is above fanon temperature (%d), clamping to %d\n",341 fanoff, fanon, fanon);342 fanoff = fanon;343 }344 345 trips[0].temperature = fanon;346 trips[0].hysteresis = fanon - fanoff;347 348 if (kernelmode) {349 if (interval > ACERHDF_MAX_INTERVAL) {350 pr_err("interval too high, set to %d\n",351 ACERHDF_MAX_INTERVAL);352 interval = ACERHDF_MAX_INTERVAL;353 }354 355 if (verbose)356 pr_notice("interval changed to: %d\n", interval);357 }358}359 360/*361 * This is the thermal zone callback which does the delayed polling of the fan362 * state. We do check /sysfs-originating settings here in acerhdf_check_param()363 * as late as the polling interval is since we can't do that in the respective364 * accessors of the module parameters.365 */366static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t)367{368 int temp, err = 0;369 370 err = acerhdf_get_temp(&temp);371 if (err)372 return err;373 374 if (verbose)375 pr_notice("temp %d\n", temp);376 377 *t = temp;378 return 0;379}380 381static bool acerhdf_should_bind(struct thermal_zone_device *thermal,382 const struct thermal_trip *trip,383 struct thermal_cooling_device *cdev,384 struct cooling_spec *c)385{386 /* if the cooling device is the one from acerhdf bind it */387 return cdev == cl_dev && trip->type == THERMAL_TRIP_ACTIVE;388}389 390static inline void acerhdf_revert_to_bios_mode(void)391{392 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);393 kernelmode = 0;394 395 pr_notice("kernel mode fan control OFF\n");396}397static inline void acerhdf_enable_kernelmode(void)398{399 kernelmode = 1;400 401 pr_notice("kernel mode fan control ON\n");402}403 404/*405 * set operation mode;406 * enabled: the thermal layer of the kernel takes care about407 * the temperature and the fan.408 * disabled: the BIOS takes control of the fan.409 */410static int acerhdf_change_mode(struct thermal_zone_device *thermal,411 enum thermal_device_mode mode)412{413 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)414 acerhdf_revert_to_bios_mode();415 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)416 acerhdf_enable_kernelmode();417 418 return 0;419}420 421static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,422 int *temperature)423{424 *temperature = ACERHDF_TEMP_CRIT;425 return 0;426}427 428/* bind callback functions to thermalzone */429static struct thermal_zone_device_ops acerhdf_dev_ops = {430 .should_bind = acerhdf_should_bind,431 .get_temp = acerhdf_get_ec_temp,432 .change_mode = acerhdf_change_mode,433 .get_crit_temp = acerhdf_get_crit_temp,434};435 436/*437 * cooling device callback functions438 * get maximal fan cooling state439 */440static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,441 unsigned long *state)442{443 *state = 1;444 445 return 0;446}447 448static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,449 unsigned long *state)450{451 int err = 0, tmp;452 453 err = acerhdf_get_fanstate(&tmp);454 if (err)455 return err;456 457 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;458 return 0;459}460 461/* change current fan state - is overwritten when running in kernel mode */462static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,463 unsigned long state)464{465 int cur_temp, cur_state, err = 0;466 467 if (!kernelmode)468 return 0;469 470 err = acerhdf_get_temp(&cur_temp);471 if (err) {472 pr_err("error reading temperature, hand off control to BIOS\n");473 goto err_out;474 }475 476 err = acerhdf_get_fanstate(&cur_state);477 if (err) {478 pr_err("error reading fan state, hand off control to BIOS\n");479 goto err_out;480 }481 482 if (state == 0) {483 if (cur_state == ACERHDF_FAN_AUTO)484 acerhdf_change_fanstate(ACERHDF_FAN_OFF);485 } else {486 if (cur_state == ACERHDF_FAN_OFF)487 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);488 }489 return 0;490 491err_out:492 acerhdf_revert_to_bios_mode();493 return -EINVAL;494}495 496/* bind fan callbacks to fan device */497static const struct thermal_cooling_device_ops acerhdf_cooling_ops = {498 .get_max_state = acerhdf_get_max_state,499 .get_cur_state = acerhdf_get_cur_state,500 .set_cur_state = acerhdf_set_cur_state,501};502 503/* suspend / resume functionality */504static int acerhdf_suspend(struct device *dev)505{506 if (kernelmode)507 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);508 509 if (verbose)510 pr_notice("going suspend\n");511 512 return 0;513}514 515static int acerhdf_probe(struct platform_device *device)516{517 return 0;518}519 520static const struct dev_pm_ops acerhdf_pm_ops = {521 .suspend = acerhdf_suspend,522 .freeze = acerhdf_suspend,523};524 525static struct platform_driver acerhdf_driver = {526 .driver = {527 .name = "acerhdf",528 .pm = &acerhdf_pm_ops,529 },530 .probe = acerhdf_probe,531};532 533/* check hardware */534static int __init acerhdf_check_hardware(void)535{536 char const *vendor, *version, *product;537 const struct bios_settings *bt = NULL;538 int found = 0;539 540 /* get BIOS data */541 vendor = dmi_get_system_info(DMI_SYS_VENDOR);542 version = dmi_get_system_info(DMI_BIOS_VERSION);543 product = dmi_get_system_info(DMI_PRODUCT_NAME);544 545 if (!vendor || !version || !product) {546 pr_err("error getting hardware information\n");547 return -EINVAL;548 }549 550 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);551 552 if (list_supported) {553 pr_info("List of supported Manufacturer/Model/BIOS:\n");554 pr_info("---------------------------------------------------\n");555 for (bt = bios_tbl; bt->vendor[0]; bt++) {556 pr_info("%-13s | %-17s | %-10s\n", bt->vendor,557 bt->product, bt->version);558 }559 pr_info("---------------------------------------------------\n");560 return -ECANCELED;561 }562 563 if (force_bios[0]) {564 version = force_bios;565 pr_info("forcing BIOS version: %s\n", version);566 kernelmode = 0;567 }568 569 if (force_product[0]) {570 product = force_product;571 pr_info("forcing BIOS product: %s\n", product);572 kernelmode = 0;573 }574 575 if (verbose)576 pr_info("BIOS info: %s %s, product: %s\n",577 vendor, version, product);578 579 /* search BIOS version and vendor in BIOS settings table */580 for (bt = bios_tbl; bt->vendor[0]; bt++) {581 /*582 * check if actual hardware BIOS vendor, product and version583 * IDs start with the strings of BIOS table entry584 */585 if (strstarts(vendor, bt->vendor) &&586 strstarts(product, bt->product) &&587 strstarts(version, bt->version)) {588 found = 1;589 break;590 }591 }592 593 if (!found) {594 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",595 vendor, product, version);596 return -EINVAL;597 }598 599 /* Copy control settings from BIOS table before we free it. */600 ctrl_cfg.fanreg = bt->fanreg;601 ctrl_cfg.tempreg = bt->tempreg;602 memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd));603 ctrl_cfg.mcmd_enable = bt->mcmd_enable;604 605 /*606 * if started with kernel mode off, prevent the kernel from switching607 * off the fan608 */609 if (!kernelmode) {610 pr_notice("Fan control off, to enable do:\n");611 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n");612 }613 614 return 0;615}616 617static int __init acerhdf_register_platform(void)618{619 int err = 0;620 621 err = platform_driver_register(&acerhdf_driver);622 if (err)623 return err;624 625 acerhdf_dev = platform_device_alloc("acerhdf", PLATFORM_DEVID_NONE);626 if (!acerhdf_dev) {627 err = -ENOMEM;628 goto err_device_alloc;629 }630 err = platform_device_add(acerhdf_dev);631 if (err)632 goto err_device_add;633 634 return 0;635 636err_device_add:637 platform_device_put(acerhdf_dev);638err_device_alloc:639 platform_driver_unregister(&acerhdf_driver);640 return err;641}642 643static void acerhdf_unregister_platform(void)644{645 platform_device_unregister(acerhdf_dev);646 platform_driver_unregister(&acerhdf_driver);647}648 649static int __init acerhdf_register_thermal(void)650{651 int ret;652 653 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,654 &acerhdf_cooling_ops);655 656 if (IS_ERR(cl_dev))657 return -EINVAL;658 659 thz_dev = thermal_zone_device_register_with_trips("acerhdf", trips, ARRAY_SIZE(trips),660 NULL, &acerhdf_dev_ops,661 &acerhdf_zone_params, 0,662 (kernelmode) ? interval*1000 : 0);663 if (IS_ERR(thz_dev))664 return -EINVAL;665 666 if (kernelmode)667 ret = thermal_zone_device_enable(thz_dev);668 else669 ret = thermal_zone_device_disable(thz_dev);670 if (ret)671 return ret;672 673 return 0;674}675 676static void acerhdf_unregister_thermal(void)677{678 if (cl_dev) {679 thermal_cooling_device_unregister(cl_dev);680 cl_dev = NULL;681 }682 683 if (thz_dev) {684 thermal_zone_device_unregister(thz_dev);685 thz_dev = NULL;686 }687}688 689static int __init acerhdf_init(void)690{691 int err = 0;692 693 err = acerhdf_check_hardware();694 if (err)695 goto out_err;696 697 err = acerhdf_register_platform();698 if (err)699 goto out_err;700 701 err = acerhdf_register_thermal();702 if (err)703 goto err_unreg;704 705 return 0;706 707err_unreg:708 acerhdf_unregister_thermal();709 acerhdf_unregister_platform();710 711out_err:712 return err;713}714 715static void __exit acerhdf_exit(void)716{717 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);718 acerhdf_unregister_thermal();719 acerhdf_unregister_platform();720}721 722MODULE_LICENSE("GPL");723MODULE_AUTHOR("Peter Kaestle");724MODULE_DESCRIPTION("Aspire One temperature and fan driver");725MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");726MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:");727MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:");728MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:");729MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:");730MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:");731MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:");732MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");733MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:");734MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:");735MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:");736MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:");737MODULE_ALIAS("dmi:*:*Acer*:pnAspire*7551:");738MODULE_ALIAS("dmi:*:*Acer*:TM8573T:");739MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");740MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");741MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:");742MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:");743MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:");744MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:");745MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:");746MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:");747MODULE_ALIAS("dmi:*:*Acer*:pnExtensa*5420*:");748 749module_init(acerhdf_init);750module_exit(acerhdf_exit);751 752static int interval_set_uint(const char *val, const struct kernel_param *kp)753{754 int ret;755 756 ret = param_set_uint(val, kp);757 if (ret)758 return ret;759 760 acerhdf_check_param(thz_dev);761 762 return 0;763}764 765static const struct kernel_param_ops interval_ops = {766 .set = interval_set_uint,767 .get = param_get_uint,768};769 770module_param_cb(interval, &interval_ops, &interval, 0000);771MODULE_PARM_DESC(interval, "Polling interval of temperature check");772