/drivers/platform/x86/acerhdf.c
C | 833 lines | 604 code | 119 blank | 110 comment | 88 complexity | ff03eb06f9a71354e16c56e91ed75984 MD5 | raw file
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * acerhdf - A driver which monitors the temperature 4 * of the aspire one netbook, turns on/off the fan 5 * as soon as the upper/lower threshold is reached. 6 * 7 * (C) 2009 - Peter Kaestle peter (a) piie.net 8 * http://piie.net 9 * 2009 Borislav Petkov bp (a) alien8.de 10 * 11 * Inspired by and many thanks to: 12 * o acerfand - Rachel Greenham 13 * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com 14 * - Petr Tomasek tomasek (#) etf,cuni,cz 15 * - Carlos Corbacho cathectic (at) gmail.com 16 * o lkml - Matthew Garrett 17 * - Borislav Petkov 18 * - Andreas Mohr 19 */ 20 21#define pr_fmt(fmt) "acerhdf: " fmt 22 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 BIOS 32 * is still in control of the fan. In this mode the driver allows to read the 33 * 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) the 35 * driver is in full control of the fan. If you want the module to be started in 36 * kernel mode by default, define the following: 37 */ 38#undef START_IN_KERNEL_MODE 39 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) the 45 * CPU's optimal operating limits denoted in junction temperature as 46 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So, 47 * assume 89°C is critical temperature. 48 */ 49#define ACERHDF_TEMP_CRIT 89000 50#define ACERHDF_FAN_OFF 0 51#define ACERHDF_FAN_AUTO 1 52 53/* 54 * No matter what value the user puts into the fanon variable, turn on the fan 55 * at 80 degree Celsius to prevent hardware damage 56 */ 57#define ACERHDF_MAX_FANON 80000 58 59/* 60 * Maximum interval between two temperature checks is 15 seconds, as the die 61 * can get hot really fast under heavy load (plus we shouldn't forget about 62 * possible impact of _external_ aggressive sources such as heaters, sun etc.) 63 */ 64#define ACERHDF_MAX_INTERVAL 15 65 66#ifdef START_IN_KERNEL_MODE 67static int kernelmode = 1; 68#else 69static int kernelmode; 70#endif 71 72static unsigned int interval = 10; 73static unsigned int fanon = 60000; 74static unsigned int fanoff = 53000; 75static unsigned int verbose; 76static unsigned int list_supported; 77static unsigned int fanstate = ACERHDF_FAN_AUTO; 78static char force_bios[16]; 79static char force_product[16]; 80static unsigned int prev_interval; 81static struct thermal_zone_device *thz_dev; 82static struct thermal_cooling_device *cl_dev; 83static struct platform_device *acerhdf_dev; 84 85module_param(kernelmode, uint, 0); 86MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); 87module_param(interval, uint, 0600); 88MODULE_PARM_DESC(interval, "Polling interval of temperature check"); 89module_param(fanon, uint, 0600); 90MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); 91module_param(fanoff, uint, 0600); 92MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); 93module_param(verbose, uint, 0600); 94MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); 95module_param(list_supported, uint, 0600); 96MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions"); 97module_param_string(force_bios, force_bios, 16, 0); 98MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version"); 99module_param_string(force_product, force_product, 16, 0); 100MODULE_PARM_DESC(force_product, "Pretend system is this known supported model"); 101 102/* 103 * cmd_off: to switch the fan completely off and check if the fan is off 104 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then 105 * the fan speed depending on the temperature 106 */ 107struct fancmd { 108 u8 cmd_off; 109 u8 cmd_auto; 110}; 111 112struct manualcmd { 113 u8 mreg; 114 u8 moff; 115}; 116 117/* default register and command to disable fan in manual mode */ 118static const struct manualcmd mcmd = { 119 .mreg = 0x94, 120 .moff = 0xff, 121}; 122 123/* BIOS settings - only used during probe */ 124struct bios_settings { 125 const char *vendor; 126 const char *product; 127 const char *version; 128 u8 fanreg; 129 u8 tempreg; 130 struct fancmd cmd; 131 int mcmd_enable; 132}; 133 134/* This could be a daughter struct in the above, but not worth the redirect */ 135struct ctrl_settings { 136 u8 fanreg; 137 u8 tempreg; 138 struct fancmd cmd; 139 int mcmd_enable; 140}; 141 142static struct ctrl_settings ctrl_cfg __read_mostly; 143 144/* Register addresses and values for different BIOS versions */ 145static const struct bios_settings bios_tbl[] __initconst = { 146 /* AOA110 */ 147 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0}, 148 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, 149 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0}, 150 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0}, 151 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0}, 152 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0}, 153 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0}, 154 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0}, 155 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0}, 156 /* AOA150 */ 157 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, 158 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0}, 159 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, 160 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0}, 161 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0}, 162 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0}, 163 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0}, 164 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, 165 /* LT1005u */ 166 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, 167 /* Acer 1410 */ 168 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 169 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 170 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 171 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 172 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 173 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 174 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 175 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 176 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 177 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 178 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 179 /* Acer 1810xx */ 180 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 181 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 182 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 183 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 184 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 185 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 186 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 187 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 188 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 189 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 190 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 191 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 192 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 193 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 194 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 195 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 196 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 197 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 198 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 199 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 200 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 201 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 202 /* Acer 5755G */ 203 {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0}, 204 {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0}, 205 /* Acer 521 */ 206 {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0}, 207 /* Acer 531 */ 208 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0}, 209 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0}, 210 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, 211 /* Acer 751 */ 212 {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0}, 213 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0}, 214 /* Acer 753 */ 215 {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1}, 216 /* Acer 1825 */ 217 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, 218 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, 219 /* Acer Extensa 5420 */ 220 {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1}, 221 /* Acer Aspire 5315 */ 222 {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1}, 223 /* Acer Aspire 5739 */ 224 {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0}, 225 /* Acer TravelMate 7730 */ 226 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0}, 227 /* Acer Aspire 7551 */ 228 {"Acer", "Aspire 7551", "V1.18", 0x93, 0xa8, {0x14, 0x04}, 1}, 229 /* Acer TravelMate TM8573T */ 230 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1}, 231 /* Gateway */ 232 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0}, 233 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0}, 234 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0}, 235 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 236 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 237 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 238 {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0}, 239 /* Packard Bell */ 240 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0}, 241 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 242 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0}, 243 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 244 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, 245 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, 246 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 247 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 248 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 249 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 250 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 251 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 252 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 253 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 254 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 255 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 256 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 257 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 258 /* pewpew-terminator */ 259 {"", "", "", 0, 0, {0, 0}, 0} 260}; 261 262/* 263 * this struct is used to instruct thermal layer to use bang_bang instead of 264 * default governor for acerhdf 265 */ 266static struct thermal_zone_params acerhdf_zone_params = { 267 .governor_name = "bang_bang", 268}; 269 270static int acerhdf_get_temp(int *temp) 271{ 272 u8 read_temp; 273 274 if (ec_read(ctrl_cfg.tempreg, &read_temp)) 275 return -EINVAL; 276 277 *temp = read_temp * 1000; 278 279 return 0; 280} 281 282static int acerhdf_get_fanstate(int *state) 283{ 284 u8 fan; 285 286 if (ec_read(ctrl_cfg.fanreg, &fan)) 287 return -EINVAL; 288 289 if (fan != ctrl_cfg.cmd.cmd_off) 290 *state = ACERHDF_FAN_AUTO; 291 else 292 *state = ACERHDF_FAN_OFF; 293 294 return 0; 295} 296 297static void acerhdf_change_fanstate(int state) 298{ 299 unsigned char cmd; 300 301 if (verbose) 302 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON"); 303 304 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { 305 pr_err("invalid fan state %d requested, setting to auto!\n", 306 state); 307 state = ACERHDF_FAN_AUTO; 308 } 309 310 cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off 311 : ctrl_cfg.cmd.cmd_auto; 312 fanstate = state; 313 314 ec_write(ctrl_cfg.fanreg, cmd); 315 316 if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) { 317 if (verbose) 318 pr_notice("turning off fan manually\n"); 319 ec_write(mcmd.mreg, mcmd.moff); 320 } 321} 322 323static void acerhdf_check_param(struct thermal_zone_device *thermal) 324{ 325 if (fanon > ACERHDF_MAX_FANON) { 326 pr_err("fanon temperature too high, set to %d\n", 327 ACERHDF_MAX_FANON); 328 fanon = ACERHDF_MAX_FANON; 329 } 330 331 if (kernelmode && prev_interval != interval) { 332 if (interval > ACERHDF_MAX_INTERVAL) { 333 pr_err("interval too high, set to %d\n", 334 ACERHDF_MAX_INTERVAL); 335 interval = ACERHDF_MAX_INTERVAL; 336 } 337 if (verbose) 338 pr_notice("interval changed to: %d\n", interval); 339 thermal->polling_delay = interval*1000; 340 prev_interval = interval; 341 } 342} 343 344/* 345 * This is the thermal zone callback which does the delayed polling of the fan 346 * state. We do check /sysfs-originating settings here in acerhdf_check_param() 347 * as late as the polling interval is since we can't do that in the respective 348 * accessors of the module parameters. 349 */ 350static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t) 351{ 352 int temp, err = 0; 353 354 acerhdf_check_param(thermal); 355 356 err = acerhdf_get_temp(&temp); 357 if (err) 358 return err; 359 360 if (verbose) 361 pr_notice("temp %d\n", temp); 362 363 *t = temp; 364 return 0; 365} 366 367static int acerhdf_bind(struct thermal_zone_device *thermal, 368 struct thermal_cooling_device *cdev) 369{ 370 /* if the cooling device is the one from acerhdf bind it */ 371 if (cdev != cl_dev) 372 return 0; 373 374 if (thermal_zone_bind_cooling_device(thermal, 0, cdev, 375 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, 376 THERMAL_WEIGHT_DEFAULT)) { 377 pr_err("error binding cooling dev\n"); 378 return -EINVAL; 379 } 380 return 0; 381} 382 383static int acerhdf_unbind(struct thermal_zone_device *thermal, 384 struct thermal_cooling_device *cdev) 385{ 386 if (cdev != cl_dev) 387 return 0; 388 389 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { 390 pr_err("error unbinding cooling dev\n"); 391 return -EINVAL; 392 } 393 return 0; 394} 395 396static inline void acerhdf_revert_to_bios_mode(void) 397{ 398 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 399 kernelmode = 0; 400 if (thz_dev) 401 thz_dev->polling_delay = 0; 402 pr_notice("kernel mode fan control OFF\n"); 403} 404static inline void acerhdf_enable_kernelmode(void) 405{ 406 kernelmode = 1; 407 408 thz_dev->polling_delay = interval*1000; 409 thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED); 410 pr_notice("kernel mode fan control ON\n"); 411} 412 413static int acerhdf_get_mode(struct thermal_zone_device *thermal, 414 enum thermal_device_mode *mode) 415{ 416 if (verbose) 417 pr_notice("kernel mode fan control %d\n", kernelmode); 418 419 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED 420 : THERMAL_DEVICE_DISABLED; 421 422 return 0; 423} 424 425/* 426 * set operation mode; 427 * enabled: the thermal layer of the kernel takes care about 428 * the temperature and the fan. 429 * disabled: the BIOS takes control of the fan. 430 */ 431static int acerhdf_set_mode(struct thermal_zone_device *thermal, 432 enum thermal_device_mode mode) 433{ 434 if (mode == THERMAL_DEVICE_DISABLED && kernelmode) 435 acerhdf_revert_to_bios_mode(); 436 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) 437 acerhdf_enable_kernelmode(); 438 439 return 0; 440} 441 442static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, 443 enum thermal_trip_type *type) 444{ 445 if (trip == 0) 446 *type = THERMAL_TRIP_ACTIVE; 447 else if (trip == 1) 448 *type = THERMAL_TRIP_CRITICAL; 449 else 450 return -EINVAL; 451 452 return 0; 453} 454 455static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip, 456 int *temp) 457{ 458 if (trip != 0) 459 return -EINVAL; 460 461 *temp = fanon - fanoff; 462 463 return 0; 464} 465 466static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, 467 int *temp) 468{ 469 if (trip == 0) 470 *temp = fanon; 471 else if (trip == 1) 472 *temp = ACERHDF_TEMP_CRIT; 473 else 474 return -EINVAL; 475 476 return 0; 477} 478 479static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, 480 int *temperature) 481{ 482 *temperature = ACERHDF_TEMP_CRIT; 483 return 0; 484} 485 486/* bind callback functions to thermalzone */ 487static struct thermal_zone_device_ops acerhdf_dev_ops = { 488 .bind = acerhdf_bind, 489 .unbind = acerhdf_unbind, 490 .get_temp = acerhdf_get_ec_temp, 491 .get_mode = acerhdf_get_mode, 492 .set_mode = acerhdf_set_mode, 493 .get_trip_type = acerhdf_get_trip_type, 494 .get_trip_hyst = acerhdf_get_trip_hyst, 495 .get_trip_temp = acerhdf_get_trip_temp, 496 .get_crit_temp = acerhdf_get_crit_temp, 497}; 498 499 500/* 501 * cooling device callback functions 502 * get maximal fan cooling state 503 */ 504static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, 505 unsigned long *state) 506{ 507 *state = 1; 508 509 return 0; 510} 511 512static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, 513 unsigned long *state) 514{ 515 int err = 0, tmp; 516 517 err = acerhdf_get_fanstate(&tmp); 518 if (err) 519 return err; 520 521 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; 522 return 0; 523} 524 525/* change current fan state - is overwritten when running in kernel mode */ 526static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, 527 unsigned long state) 528{ 529 int cur_temp, cur_state, err = 0; 530 531 if (!kernelmode) 532 return 0; 533 534 err = acerhdf_get_temp(&cur_temp); 535 if (err) { 536 pr_err("error reading temperature, hand off control to BIOS\n"); 537 goto err_out; 538 } 539 540 err = acerhdf_get_fanstate(&cur_state); 541 if (err) { 542 pr_err("error reading fan state, hand off control to BIOS\n"); 543 goto err_out; 544 } 545 546 if (state == 0) { 547 if (cur_state == ACERHDF_FAN_AUTO) 548 acerhdf_change_fanstate(ACERHDF_FAN_OFF); 549 } else { 550 if (cur_state == ACERHDF_FAN_OFF) 551 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 552 } 553 return 0; 554 555err_out: 556 acerhdf_revert_to_bios_mode(); 557 return -EINVAL; 558} 559 560/* bind fan callbacks to fan device */ 561static const struct thermal_cooling_device_ops acerhdf_cooling_ops = { 562 .get_max_state = acerhdf_get_max_state, 563 .get_cur_state = acerhdf_get_cur_state, 564 .set_cur_state = acerhdf_set_cur_state, 565}; 566 567/* suspend / resume functionality */ 568static int acerhdf_suspend(struct device *dev) 569{ 570 if (kernelmode) 571 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 572 573 if (verbose) 574 pr_notice("going suspend\n"); 575 576 return 0; 577} 578 579static int acerhdf_probe(struct platform_device *device) 580{ 581 return 0; 582} 583 584static int acerhdf_remove(struct platform_device *device) 585{ 586 return 0; 587} 588 589static const struct dev_pm_ops acerhdf_pm_ops = { 590 .suspend = acerhdf_suspend, 591 .freeze = acerhdf_suspend, 592}; 593 594static struct platform_driver acerhdf_driver = { 595 .driver = { 596 .name = "acerhdf", 597 .pm = &acerhdf_pm_ops, 598 }, 599 .probe = acerhdf_probe, 600 .remove = acerhdf_remove, 601}; 602 603/* checks if str begins with start */ 604static int str_starts_with(const char *str, const char *start) 605{ 606 unsigned long str_len = 0, start_len = 0; 607 608 str_len = strlen(str); 609 start_len = strlen(start); 610 611 if (str_len >= start_len && 612 !strncmp(str, start, start_len)) 613 return 1; 614 615 return 0; 616} 617 618/* check hardware */ 619static int __init acerhdf_check_hardware(void) 620{ 621 char const *vendor, *version, *product; 622 const struct bios_settings *bt = NULL; 623 int found = 0; 624 625 /* get BIOS data */ 626 vendor = dmi_get_system_info(DMI_SYS_VENDOR); 627 version = dmi_get_system_info(DMI_BIOS_VERSION); 628 product = dmi_get_system_info(DMI_PRODUCT_NAME); 629 630 if (!vendor || !version || !product) { 631 pr_err("error getting hardware information\n"); 632 return -EINVAL; 633 } 634 635 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); 636 637 if (list_supported) { 638 pr_info("List of supported Manufacturer/Model/BIOS:\n"); 639 pr_info("---------------------------------------------------\n"); 640 for (bt = bios_tbl; bt->vendor[0]; bt++) { 641 pr_info("%-13s | %-17s | %-10s\n", bt->vendor, 642 bt->product, bt->version); 643 } 644 pr_info("---------------------------------------------------\n"); 645 return -ECANCELED; 646 } 647 648 if (force_bios[0]) { 649 version = force_bios; 650 pr_info("forcing BIOS version: %s\n", version); 651 kernelmode = 0; 652 } 653 654 if (force_product[0]) { 655 product = force_product; 656 pr_info("forcing BIOS product: %s\n", product); 657 kernelmode = 0; 658 } 659 660 if (verbose) 661 pr_info("BIOS info: %s %s, product: %s\n", 662 vendor, version, product); 663 664 /* search BIOS version and vendor in BIOS settings table */ 665 for (bt = bios_tbl; bt->vendor[0]; bt++) { 666 /* 667 * check if actual hardware BIOS vendor, product and version 668 * IDs start with the strings of BIOS table entry 669 */ 670 if (str_starts_with(vendor, bt->vendor) && 671 str_starts_with(product, bt->product) && 672 str_starts_with(version, bt->version)) { 673 found = 1; 674 break; 675 } 676 } 677 678 if (!found) { 679 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n", 680 vendor, product, version); 681 return -EINVAL; 682 } 683 684 /* Copy control settings from BIOS table before we free it. */ 685 ctrl_cfg.fanreg = bt->fanreg; 686 ctrl_cfg.tempreg = bt->tempreg; 687 memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd)); 688 ctrl_cfg.mcmd_enable = bt->mcmd_enable; 689 690 /* 691 * if started with kernel mode off, prevent the kernel from switching 692 * off the fan 693 */ 694 if (!kernelmode) { 695 pr_notice("Fan control off, to enable do:\n"); 696 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n"); 697 } 698 699 return 0; 700} 701 702static int __init acerhdf_register_platform(void) 703{ 704 int err = 0; 705 706 err = platform_driver_register(&acerhdf_driver); 707 if (err) 708 return err; 709 710 acerhdf_dev = platform_device_alloc("acerhdf", -1); 711 if (!acerhdf_dev) { 712 err = -ENOMEM; 713 goto err_device_alloc; 714 } 715 err = platform_device_add(acerhdf_dev); 716 if (err) 717 goto err_device_add; 718 719 return 0; 720 721err_device_add: 722 platform_device_put(acerhdf_dev); 723err_device_alloc: 724 platform_driver_unregister(&acerhdf_driver); 725 return err; 726} 727 728static void acerhdf_unregister_platform(void) 729{ 730 platform_device_unregister(acerhdf_dev); 731 platform_driver_unregister(&acerhdf_driver); 732} 733 734static int __init acerhdf_register_thermal(void) 735{ 736 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, 737 &acerhdf_cooling_ops); 738 739 if (IS_ERR(cl_dev)) 740 return -EINVAL; 741 742 thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL, 743 &acerhdf_dev_ops, 744 &acerhdf_zone_params, 0, 745 (kernelmode) ? interval*1000 : 0); 746 if (IS_ERR(thz_dev)) 747 return -EINVAL; 748 749 if (strcmp(thz_dev->governor->name, 750 acerhdf_zone_params.governor_name)) { 751 pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n", 752 acerhdf_zone_params.governor_name); 753 return -EINVAL; 754 } 755 756 return 0; 757} 758 759static void acerhdf_unregister_thermal(void) 760{ 761 if (cl_dev) { 762 thermal_cooling_device_unregister(cl_dev); 763 cl_dev = NULL; 764 } 765 766 if (thz_dev) { 767 thermal_zone_device_unregister(thz_dev); 768 thz_dev = NULL; 769 } 770} 771 772static int __init acerhdf_init(void) 773{ 774 int err = 0; 775 776 err = acerhdf_check_hardware(); 777 if (err) 778 goto out_err; 779 780 err = acerhdf_register_platform(); 781 if (err) 782 goto out_err; 783 784 err = acerhdf_register_thermal(); 785 if (err) 786 goto err_unreg; 787 788 return 0; 789 790err_unreg: 791 acerhdf_unregister_thermal(); 792 acerhdf_unregister_platform(); 793 794out_err: 795 return err; 796} 797 798static void __exit acerhdf_exit(void) 799{ 800 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 801 acerhdf_unregister_thermal(); 802 acerhdf_unregister_platform(); 803} 804 805MODULE_LICENSE("GPL"); 806MODULE_AUTHOR("Peter Kaestle"); 807MODULE_DESCRIPTION("Aspire One temperature and fan driver"); 808MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); 809MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:"); 810MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); 811MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); 812MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:"); 813MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:"); 814MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:"); 815MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); 816MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:"); 817MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:"); 818MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:"); 819MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:"); 820MODULE_ALIAS("dmi:*:*Acer*:pnAspire*7551:"); 821MODULE_ALIAS("dmi:*:*Acer*:TM8573T:"); 822MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); 823MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); 824MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); 825MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); 826MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); 827MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:"); 828MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); 829MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:"); 830MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:"); 831 832module_init(acerhdf_init); 833module_exit(acerhdf_exit);