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 Feuerer 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 67 static int kernelmode = 1; 68 #else 69 static int kernelmode; 70 #endif 71 72 static unsigned int interval = 10; 73 static unsigned int fanon = 60000; 74 static unsigned int fanoff = 53000; 75 static unsigned int verbose; 76 static unsigned int list_supported; 77 static unsigned int fanstate = ACERHDF_FAN_AUTO; 78 static char force_bios[16]; 79 static char force_product[16]; 80 static unsigned int prev_interval; 81 static struct thermal_zone_device *thz_dev; 82 static struct thermal_cooling_device *cl_dev; 83 static struct platform_device *acerhdf_dev; 84 85 module_param(kernelmode, uint, 0); 86 MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); 87 module_param(interval, uint, 0600); 88 MODULE_PARM_DESC(interval, "Polling interval of temperature check"); 89 module_param(fanon, uint, 0600); 90 MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); 91 module_param(fanoff, uint, 0600); 92 MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); 93 module_param(verbose, uint, 0600); 94 MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); 95 module_param(list_supported, uint, 0600); 96 MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions"); 97 module_param_string(force_bios, force_bios, 16, 0); 98 MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version"); 99 module_param_string(force_product, force_product, 16, 0); 100 MODULE_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 */ 107 struct fancmd { 108 u8 cmd_off; 109 u8 cmd_auto; 110 }; 111 112 struct manualcmd { 113 u8 mreg; 114 u8 moff; 115 }; 116 117 /* default register and command to disable fan in manual mode */ 118 static const struct manualcmd mcmd = { 119 .mreg = 0x94, 120 .moff = 0xff, 121 }; 122 123 /* BIOS settings - only used during probe */ 124 struct 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 */ 135 struct ctrl_settings { 136 u8 fanreg; 137 u8 tempreg; 138 struct fancmd cmd; 139 int mcmd_enable; 140 }; 141 142 static struct ctrl_settings ctrl_cfg __read_mostly; 143 144 /* Register addresses and values for different BIOS versions */ 145 static 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 TravelMate TM8573T */ 228 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1}, 229 /* Gateway */ 230 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0}, 231 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0}, 232 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0}, 233 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 234 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 235 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 236 {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0}, 237 /* Packard Bell */ 238 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0}, 239 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 240 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0}, 241 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 242 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, 243 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, 244 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 245 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 246 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 247 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 248 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 249 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 250 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 251 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 252 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 253 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 254 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 255 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 256 /* pewpew-terminator */ 257 {"", "", "", 0, 0, {0, 0}, 0} 258 }; 259 260 /* 261 * this struct is used to instruct thermal layer to use bang_bang instead of 262 * default governor for acerhdf 263 */ 264 static struct thermal_zone_params acerhdf_zone_params = { 265 .governor_name = "bang_bang", 266 }; 267 268 static int acerhdf_get_temp(int *temp) 269 { 270 u8 read_temp; 271 272 if (ec_read(ctrl_cfg.tempreg, &read_temp)) 273 return -EINVAL; 274 275 *temp = read_temp * 1000; 276 277 return 0; 278 } 279 280 static int acerhdf_get_fanstate(int *state) 281 { 282 u8 fan; 283 284 if (ec_read(ctrl_cfg.fanreg, &fan)) 285 return -EINVAL; 286 287 if (fan != ctrl_cfg.cmd.cmd_off) 288 *state = ACERHDF_FAN_AUTO; 289 else 290 *state = ACERHDF_FAN_OFF; 291 292 return 0; 293 } 294 295 static void acerhdf_change_fanstate(int state) 296 { 297 unsigned char cmd; 298 299 if (verbose) 300 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON"); 301 302 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { 303 pr_err("invalid fan state %d requested, setting to auto!\n", 304 state); 305 state = ACERHDF_FAN_AUTO; 306 } 307 308 cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off 309 : ctrl_cfg.cmd.cmd_auto; 310 fanstate = state; 311 312 ec_write(ctrl_cfg.fanreg, cmd); 313 314 if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) { 315 if (verbose) 316 pr_notice("turning off fan manually\n"); 317 ec_write(mcmd.mreg, mcmd.moff); 318 } 319 } 320 321 static void acerhdf_check_param(struct thermal_zone_device *thermal) 322 { 323 if (fanon > ACERHDF_MAX_FANON) { 324 pr_err("fanon temperature too high, set to %d\n", 325 ACERHDF_MAX_FANON); 326 fanon = ACERHDF_MAX_FANON; 327 } 328 329 if (kernelmode && prev_interval != interval) { 330 if (interval > ACERHDF_MAX_INTERVAL) { 331 pr_err("interval too high, set to %d\n", 332 ACERHDF_MAX_INTERVAL); 333 interval = ACERHDF_MAX_INTERVAL; 334 } 335 if (verbose) 336 pr_notice("interval changed to: %d\n", interval); 337 thermal->polling_delay = interval*1000; 338 prev_interval = interval; 339 } 340 } 341 342 /* 343 * This is the thermal zone callback which does the delayed polling of the fan 344 * state. We do check /sysfs-originating settings here in acerhdf_check_param() 345 * as late as the polling interval is since we can't do that in the respective 346 * accessors of the module parameters. 347 */ 348 static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t) 349 { 350 int temp, err = 0; 351 352 acerhdf_check_param(thermal); 353 354 err = acerhdf_get_temp(&temp); 355 if (err) 356 return err; 357 358 if (verbose) 359 pr_notice("temp %d\n", temp); 360 361 *t = temp; 362 return 0; 363 } 364 365 static int acerhdf_bind(struct thermal_zone_device *thermal, 366 struct thermal_cooling_device *cdev) 367 { 368 /* if the cooling device is the one from acerhdf bind it */ 369 if (cdev != cl_dev) 370 return 0; 371 372 if (thermal_zone_bind_cooling_device(thermal, 0, cdev, 373 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, 374 THERMAL_WEIGHT_DEFAULT)) { 375 pr_err("error binding cooling dev\n"); 376 return -EINVAL; 377 } 378 return 0; 379 } 380 381 static int acerhdf_unbind(struct thermal_zone_device *thermal, 382 struct thermal_cooling_device *cdev) 383 { 384 if (cdev != cl_dev) 385 return 0; 386 387 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { 388 pr_err("error unbinding cooling dev\n"); 389 return -EINVAL; 390 } 391 return 0; 392 } 393 394 static inline void acerhdf_revert_to_bios_mode(void) 395 { 396 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 397 kernelmode = 0; 398 if (thz_dev) 399 thz_dev->polling_delay = 0; 400 pr_notice("kernel mode fan control OFF\n"); 401 } 402 static inline void acerhdf_enable_kernelmode(void) 403 { 404 kernelmode = 1; 405 406 thz_dev->polling_delay = interval*1000; 407 thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED); 408 pr_notice("kernel mode fan control ON\n"); 409 } 410 411 static int acerhdf_get_mode(struct thermal_zone_device *thermal, 412 enum thermal_device_mode *mode) 413 { 414 if (verbose) 415 pr_notice("kernel mode fan control %d\n", kernelmode); 416 417 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED 418 : THERMAL_DEVICE_DISABLED; 419 420 return 0; 421 } 422 423 /* 424 * set operation mode; 425 * enabled: the thermal layer of the kernel takes care about 426 * the temperature and the fan. 427 * disabled: the BIOS takes control of the fan. 428 */ 429 static int acerhdf_set_mode(struct thermal_zone_device *thermal, 430 enum thermal_device_mode mode) 431 { 432 if (mode == THERMAL_DEVICE_DISABLED && kernelmode) 433 acerhdf_revert_to_bios_mode(); 434 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) 435 acerhdf_enable_kernelmode(); 436 437 return 0; 438 } 439 440 static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, 441 enum thermal_trip_type *type) 442 { 443 if (trip == 0) 444 *type = THERMAL_TRIP_ACTIVE; 445 else if (trip == 1) 446 *type = THERMAL_TRIP_CRITICAL; 447 else 448 return -EINVAL; 449 450 return 0; 451 } 452 453 static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip, 454 int *temp) 455 { 456 if (trip != 0) 457 return -EINVAL; 458 459 *temp = fanon - fanoff; 460 461 return 0; 462 } 463 464 static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, 465 int *temp) 466 { 467 if (trip == 0) 468 *temp = fanon; 469 else if (trip == 1) 470 *temp = ACERHDF_TEMP_CRIT; 471 else 472 return -EINVAL; 473 474 return 0; 475 } 476 477 static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, 478 int *temperature) 479 { 480 *temperature = ACERHDF_TEMP_CRIT; 481 return 0; 482 } 483 484 /* bind callback functions to thermalzone */ 485 static struct thermal_zone_device_ops acerhdf_dev_ops = { 486 .bind = acerhdf_bind, 487 .unbind = acerhdf_unbind, 488 .get_temp = acerhdf_get_ec_temp, 489 .get_mode = acerhdf_get_mode, 490 .set_mode = acerhdf_set_mode, 491 .get_trip_type = acerhdf_get_trip_type, 492 .get_trip_hyst = acerhdf_get_trip_hyst, 493 .get_trip_temp = acerhdf_get_trip_temp, 494 .get_crit_temp = acerhdf_get_crit_temp, 495 }; 496 497 498 /* 499 * cooling device callback functions 500 * get maximal fan cooling state 501 */ 502 static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, 503 unsigned long *state) 504 { 505 *state = 1; 506 507 return 0; 508 } 509 510 static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, 511 unsigned long *state) 512 { 513 int err = 0, tmp; 514 515 err = acerhdf_get_fanstate(&tmp); 516 if (err) 517 return err; 518 519 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; 520 return 0; 521 } 522 523 /* change current fan state - is overwritten when running in kernel mode */ 524 static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, 525 unsigned long state) 526 { 527 int cur_temp, cur_state, err = 0; 528 529 if (!kernelmode) 530 return 0; 531 532 err = acerhdf_get_temp(&cur_temp); 533 if (err) { 534 pr_err("error reading temperature, hand off control to BIOS\n"); 535 goto err_out; 536 } 537 538 err = acerhdf_get_fanstate(&cur_state); 539 if (err) { 540 pr_err("error reading fan state, hand off control to BIOS\n"); 541 goto err_out; 542 } 543 544 if (state == 0) { 545 if (cur_state == ACERHDF_FAN_AUTO) 546 acerhdf_change_fanstate(ACERHDF_FAN_OFF); 547 } else { 548 if (cur_state == ACERHDF_FAN_OFF) 549 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 550 } 551 return 0; 552 553 err_out: 554 acerhdf_revert_to_bios_mode(); 555 return -EINVAL; 556 } 557 558 /* bind fan callbacks to fan device */ 559 static const struct thermal_cooling_device_ops acerhdf_cooling_ops = { 560 .get_max_state = acerhdf_get_max_state, 561 .get_cur_state = acerhdf_get_cur_state, 562 .set_cur_state = acerhdf_set_cur_state, 563 }; 564 565 /* suspend / resume functionality */ 566 static int acerhdf_suspend(struct device *dev) 567 { 568 if (kernelmode) 569 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 570 571 if (verbose) 572 pr_notice("going suspend\n"); 573 574 return 0; 575 } 576 577 static int acerhdf_probe(struct platform_device *device) 578 { 579 return 0; 580 } 581 582 static int acerhdf_remove(struct platform_device *device) 583 { 584 return 0; 585 } 586 587 static const struct dev_pm_ops acerhdf_pm_ops = { 588 .suspend = acerhdf_suspend, 589 .freeze = acerhdf_suspend, 590 }; 591 592 static struct platform_driver acerhdf_driver = { 593 .driver = { 594 .name = "acerhdf", 595 .pm = &acerhdf_pm_ops, 596 }, 597 .probe = acerhdf_probe, 598 .remove = acerhdf_remove, 599 }; 600 601 /* checks if str begins with start */ 602 static int str_starts_with(const char *str, const char *start) 603 { 604 unsigned long str_len = 0, start_len = 0; 605 606 str_len = strlen(str); 607 start_len = strlen(start); 608 609 if (str_len >= start_len && 610 !strncmp(str, start, start_len)) 611 return 1; 612 613 return 0; 614 } 615 616 /* check hardware */ 617 static int __init acerhdf_check_hardware(void) 618 { 619 char const *vendor, *version, *product; 620 const struct bios_settings *bt = NULL; 621 int found = 0; 622 623 /* get BIOS data */ 624 vendor = dmi_get_system_info(DMI_SYS_VENDOR); 625 version = dmi_get_system_info(DMI_BIOS_VERSION); 626 product = dmi_get_system_info(DMI_PRODUCT_NAME); 627 628 if (!vendor || !version || !product) { 629 pr_err("error getting hardware information\n"); 630 return -EINVAL; 631 } 632 633 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); 634 635 if (list_supported) { 636 pr_info("List of supported Manufacturer/Model/BIOS:\n"); 637 pr_info("---------------------------------------------------\n"); 638 for (bt = bios_tbl; bt->vendor[0]; bt++) { 639 pr_info("%-13s | %-17s | %-10s\n", bt->vendor, 640 bt->product, bt->version); 641 } 642 pr_info("---------------------------------------------------\n"); 643 return -ECANCELED; 644 } 645 646 if (force_bios[0]) { 647 version = force_bios; 648 pr_info("forcing BIOS version: %s\n", version); 649 kernelmode = 0; 650 } 651 652 if (force_product[0]) { 653 product = force_product; 654 pr_info("forcing BIOS product: %s\n", product); 655 kernelmode = 0; 656 } 657 658 if (verbose) 659 pr_info("BIOS info: %s %s, product: %s\n", 660 vendor, version, product); 661 662 /* search BIOS version and vendor in BIOS settings table */ 663 for (bt = bios_tbl; bt->vendor[0]; bt++) { 664 /* 665 * check if actual hardware BIOS vendor, product and version 666 * IDs start with the strings of BIOS table entry 667 */ 668 if (str_starts_with(vendor, bt->vendor) && 669 str_starts_with(product, bt->product) && 670 str_starts_with(version, bt->version)) { 671 found = 1; 672 break; 673 } 674 } 675 676 if (!found) { 677 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n", 678 vendor, product, version); 679 return -EINVAL; 680 } 681 682 /* Copy control settings from BIOS table before we free it. */ 683 ctrl_cfg.fanreg = bt->fanreg; 684 ctrl_cfg.tempreg = bt->tempreg; 685 memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd)); 686 ctrl_cfg.mcmd_enable = bt->mcmd_enable; 687 688 /* 689 * if started with kernel mode off, prevent the kernel from switching 690 * off the fan 691 */ 692 if (!kernelmode) { 693 pr_notice("Fan control off, to enable do:\n"); 694 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n"); 695 } 696 697 return 0; 698 } 699 700 static int __init acerhdf_register_platform(void) 701 { 702 int err = 0; 703 704 err = platform_driver_register(&acerhdf_driver); 705 if (err) 706 return err; 707 708 acerhdf_dev = platform_device_alloc("acerhdf", -1); 709 if (!acerhdf_dev) { 710 err = -ENOMEM; 711 goto err_device_alloc; 712 } 713 err = platform_device_add(acerhdf_dev); 714 if (err) 715 goto err_device_add; 716 717 return 0; 718 719 err_device_add: 720 platform_device_put(acerhdf_dev); 721 err_device_alloc: 722 platform_driver_unregister(&acerhdf_driver); 723 return err; 724 } 725 726 static void acerhdf_unregister_platform(void) 727 { 728 platform_device_unregister(acerhdf_dev); 729 platform_driver_unregister(&acerhdf_driver); 730 } 731 732 static int __init acerhdf_register_thermal(void) 733 { 734 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, 735 &acerhdf_cooling_ops); 736 737 if (IS_ERR(cl_dev)) 738 return -EINVAL; 739 740 thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL, 741 &acerhdf_dev_ops, 742 &acerhdf_zone_params, 0, 743 (kernelmode) ? interval*1000 : 0); 744 if (IS_ERR(thz_dev)) 745 return -EINVAL; 746 747 if (strcmp(thz_dev->governor->name, 748 acerhdf_zone_params.governor_name)) { 749 pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n", 750 acerhdf_zone_params.governor_name); 751 return -EINVAL; 752 } 753 754 return 0; 755 } 756 757 static void acerhdf_unregister_thermal(void) 758 { 759 if (cl_dev) { 760 thermal_cooling_device_unregister(cl_dev); 761 cl_dev = NULL; 762 } 763 764 if (thz_dev) { 765 thermal_zone_device_unregister(thz_dev); 766 thz_dev = NULL; 767 } 768 } 769 770 static int __init acerhdf_init(void) 771 { 772 int err = 0; 773 774 err = acerhdf_check_hardware(); 775 if (err) 776 goto out_err; 777 778 err = acerhdf_register_platform(); 779 if (err) 780 goto out_err; 781 782 err = acerhdf_register_thermal(); 783 if (err) 784 goto err_unreg; 785 786 return 0; 787 788 err_unreg: 789 acerhdf_unregister_thermal(); 790 acerhdf_unregister_platform(); 791 792 out_err: 793 return err; 794 } 795 796 static void __exit acerhdf_exit(void) 797 { 798 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 799 acerhdf_unregister_thermal(); 800 acerhdf_unregister_platform(); 801 } 802 803 MODULE_LICENSE("GPL"); 804 MODULE_AUTHOR("Peter Feuerer"); 805 MODULE_DESCRIPTION("Aspire One temperature and fan driver"); 806 MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); 807 MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:"); 808 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); 809 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); 810 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:"); 811 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:"); 812 MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:"); 813 MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); 814 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:"); 815 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:"); 816 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:"); 817 MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:"); 818 MODULE_ALIAS("dmi:*:*Acer*:TM8573T:"); 819 MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); 820 MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); 821 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); 822 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); 823 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); 824 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:"); 825 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); 826 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:"); 827 MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:"); 828 829 module_init(acerhdf_init); 830 module_exit(acerhdf_exit); 831