1 /* 2 * acerhdf - A driver which monitors the temperature 3 * of the aspire one netbook, turns on/off the fan 4 * as soon as the upper/lower threshold is reached. 5 * 6 * (C) 2009 - Peter Feuerer peter (a) piie.net 7 * http://piie.net 8 * 2009 Borislav Petkov bp (a) alien8.de 9 * 10 * Inspired by and many thanks to: 11 * o acerfand - Rachel Greenham 12 * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com 13 * - Petr Tomasek tomasek (#) etf,cuni,cz 14 * - Carlos Corbacho cathectic (at) gmail.com 15 * o lkml - Matthew Garrett 16 * - Borislav Petkov 17 * - Andreas Mohr 18 * 19 * This program is free software; you can redistribute it and/or modify 20 * it under the terms of the GNU General Public License as published by 21 * the Free Software Foundation; either version 2 of the License, or 22 * (at your option) any later version. 23 * 24 * This program is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27 * GNU General Public License for more details. 28 * 29 * You should have received a copy of the GNU General Public License 30 * along with this program; if not, write to the Free Software 31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 32 */ 33 34 #define pr_fmt(fmt) "acerhdf: " fmt 35 36 #include <linux/kernel.h> 37 #include <linux/module.h> 38 #include <linux/dmi.h> 39 #include <linux/acpi.h> 40 #include <linux/thermal.h> 41 #include <linux/platform_device.h> 42 43 /* 44 * The driver is started with "kernel mode off" by default. That means, the BIOS 45 * is still in control of the fan. In this mode the driver allows to read the 46 * temperature of the cpu and a userspace tool may take over control of the fan. 47 * If the driver is switched to "kernel mode" (e.g. via module parameter) the 48 * driver is in full control of the fan. If you want the module to be started in 49 * kernel mode by default, define the following: 50 */ 51 #undef START_IN_KERNEL_MODE 52 53 #define DRV_VER "0.7.0" 54 55 /* 56 * According to the Atom N270 datasheet, 57 * (http://download.intel.com/design/processor/datashts/320032.pdf) the 58 * CPU's optimal operating limits denoted in junction temperature as 59 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So, 60 * assume 89°C is critical temperature. 61 */ 62 #define ACERHDF_TEMP_CRIT 89000 63 #define ACERHDF_FAN_OFF 0 64 #define ACERHDF_FAN_AUTO 1 65 66 /* 67 * No matter what value the user puts into the fanon variable, turn on the fan 68 * at 80 degree Celsius to prevent hardware damage 69 */ 70 #define ACERHDF_MAX_FANON 80000 71 72 /* 73 * Maximum interval between two temperature checks is 15 seconds, as the die 74 * can get hot really fast under heavy load (plus we shouldn't forget about 75 * possible impact of _external_ aggressive sources such as heaters, sun etc.) 76 */ 77 #define ACERHDF_MAX_INTERVAL 15 78 79 #ifdef START_IN_KERNEL_MODE 80 static int kernelmode = 1; 81 #else 82 static int kernelmode; 83 #endif 84 85 static unsigned int interval = 10; 86 static unsigned int fanon = 60000; 87 static unsigned int fanoff = 53000; 88 static unsigned int verbose; 89 static unsigned int list_supported; 90 static unsigned int fanstate = ACERHDF_FAN_AUTO; 91 static char force_bios[16]; 92 static char force_product[16]; 93 static unsigned int prev_interval; 94 static struct thermal_zone_device *thz_dev; 95 static struct thermal_cooling_device *cl_dev; 96 static struct platform_device *acerhdf_dev; 97 98 module_param(kernelmode, uint, 0); 99 MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); 100 module_param(interval, uint, 0600); 101 MODULE_PARM_DESC(interval, "Polling interval of temperature check"); 102 module_param(fanon, uint, 0600); 103 MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); 104 module_param(fanoff, uint, 0600); 105 MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); 106 module_param(verbose, uint, 0600); 107 MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); 108 module_param(list_supported, uint, 0600); 109 MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions"); 110 module_param_string(force_bios, force_bios, 16, 0); 111 MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version"); 112 module_param_string(force_product, force_product, 16, 0); 113 MODULE_PARM_DESC(force_product, "Pretend system is this known supported model"); 114 115 /* 116 * cmd_off: to switch the fan completely off and check if the fan is off 117 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then 118 * the fan speed depending on the temperature 119 */ 120 struct fancmd { 121 u8 cmd_off; 122 u8 cmd_auto; 123 }; 124 125 struct manualcmd { 126 u8 mreg; 127 u8 moff; 128 }; 129 130 /* default register and command to disable fan in manual mode */ 131 static const struct manualcmd mcmd = { 132 .mreg = 0x94, 133 .moff = 0xff, 134 }; 135 136 /* BIOS settings - only used during probe */ 137 struct bios_settings { 138 const char *vendor; 139 const char *product; 140 const char *version; 141 u8 fanreg; 142 u8 tempreg; 143 struct fancmd cmd; 144 int mcmd_enable; 145 }; 146 147 /* This could be a daughter struct in the above, but not worth the redirect */ 148 struct ctrl_settings { 149 u8 fanreg; 150 u8 tempreg; 151 struct fancmd cmd; 152 int mcmd_enable; 153 }; 154 155 static struct ctrl_settings ctrl_cfg __read_mostly; 156 157 /* Register addresses and values for different BIOS versions */ 158 static const struct bios_settings bios_tbl[] __initconst = { 159 /* AOA110 */ 160 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0}, 161 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, 162 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0}, 163 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0}, 164 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0}, 165 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0}, 166 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0}, 167 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0}, 168 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0}, 169 /* AOA150 */ 170 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, 171 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0}, 172 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, 173 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0}, 174 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0}, 175 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0}, 176 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0}, 177 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, 178 /* LT1005u */ 179 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, 180 /* Acer 1410 */ 181 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 182 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 183 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 184 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 185 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 186 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 187 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 188 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 189 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 190 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 191 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 192 /* Acer 1810xx */ 193 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 194 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 195 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 196 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 197 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 198 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 199 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 200 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 201 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 202 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 203 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 204 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 205 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 206 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 207 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 208 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 209 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 210 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 211 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 212 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, 213 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 214 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, 215 /* Acer 5755G */ 216 {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0}, 217 {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0}, 218 /* Acer 521 */ 219 {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0}, 220 /* Acer 531 */ 221 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0}, 222 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0}, 223 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, 224 /* Acer 751 */ 225 {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0}, 226 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0}, 227 /* Acer 753 */ 228 {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1}, 229 /* Acer 1825 */ 230 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, 231 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, 232 /* Acer Extensa 5420 */ 233 {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1}, 234 /* Acer Aspire 5315 */ 235 {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1}, 236 /* Acer Aspire 5739 */ 237 {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0}, 238 /* Acer TravelMate 7730 */ 239 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0}, 240 /* Acer TravelMate TM8573T */ 241 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1}, 242 /* Gateway */ 243 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0}, 244 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0}, 245 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0}, 246 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 247 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 248 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 249 {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0}, 250 /* Packard Bell */ 251 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0}, 252 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 253 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0}, 254 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, 255 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, 256 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, 257 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, 258 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, 259 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, 260 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, 261 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, 262 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, 263 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, 264 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, 265 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, 266 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, 267 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, 268 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, 269 /* pewpew-terminator */ 270 {"", "", "", 0, 0, {0, 0}, 0} 271 }; 272 273 /* 274 * this struct is used to instruct thermal layer to use bang_bang instead of 275 * default governor for acerhdf 276 */ 277 static struct thermal_zone_params acerhdf_zone_params = { 278 .governor_name = "bang_bang", 279 }; 280 281 static int acerhdf_get_temp(int *temp) 282 { 283 u8 read_temp; 284 285 if (ec_read(ctrl_cfg.tempreg, &read_temp)) 286 return -EINVAL; 287 288 *temp = read_temp * 1000; 289 290 return 0; 291 } 292 293 static int acerhdf_get_fanstate(int *state) 294 { 295 u8 fan; 296 297 if (ec_read(ctrl_cfg.fanreg, &fan)) 298 return -EINVAL; 299 300 if (fan != ctrl_cfg.cmd.cmd_off) 301 *state = ACERHDF_FAN_AUTO; 302 else 303 *state = ACERHDF_FAN_OFF; 304 305 return 0; 306 } 307 308 static void acerhdf_change_fanstate(int state) 309 { 310 unsigned char cmd; 311 312 if (verbose) 313 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON"); 314 315 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { 316 pr_err("invalid fan state %d requested, setting to auto!\n", 317 state); 318 state = ACERHDF_FAN_AUTO; 319 } 320 321 cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off 322 : ctrl_cfg.cmd.cmd_auto; 323 fanstate = state; 324 325 ec_write(ctrl_cfg.fanreg, cmd); 326 327 if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) { 328 if (verbose) 329 pr_notice("turning off fan manually\n"); 330 ec_write(mcmd.mreg, mcmd.moff); 331 } 332 } 333 334 static void acerhdf_check_param(struct thermal_zone_device *thermal) 335 { 336 if (fanon > ACERHDF_MAX_FANON) { 337 pr_err("fanon temperature too high, set to %d\n", 338 ACERHDF_MAX_FANON); 339 fanon = ACERHDF_MAX_FANON; 340 } 341 342 if (kernelmode && prev_interval != interval) { 343 if (interval > ACERHDF_MAX_INTERVAL) { 344 pr_err("interval too high, set to %d\n", 345 ACERHDF_MAX_INTERVAL); 346 interval = ACERHDF_MAX_INTERVAL; 347 } 348 if (verbose) 349 pr_notice("interval changed to: %d\n", interval); 350 thermal->polling_delay = interval*1000; 351 prev_interval = interval; 352 } 353 } 354 355 /* 356 * This is the thermal zone callback which does the delayed polling of the fan 357 * state. We do check /sysfs-originating settings here in acerhdf_check_param() 358 * as late as the polling interval is since we can't do that in the respective 359 * accessors of the module parameters. 360 */ 361 static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t) 362 { 363 int temp, err = 0; 364 365 acerhdf_check_param(thermal); 366 367 err = acerhdf_get_temp(&temp); 368 if (err) 369 return err; 370 371 if (verbose) 372 pr_notice("temp %d\n", temp); 373 374 *t = temp; 375 return 0; 376 } 377 378 static int acerhdf_bind(struct thermal_zone_device *thermal, 379 struct thermal_cooling_device *cdev) 380 { 381 /* if the cooling device is the one from acerhdf bind it */ 382 if (cdev != cl_dev) 383 return 0; 384 385 if (thermal_zone_bind_cooling_device(thermal, 0, cdev, 386 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, 387 THERMAL_WEIGHT_DEFAULT)) { 388 pr_err("error binding cooling dev\n"); 389 return -EINVAL; 390 } 391 return 0; 392 } 393 394 static int acerhdf_unbind(struct thermal_zone_device *thermal, 395 struct thermal_cooling_device *cdev) 396 { 397 if (cdev != cl_dev) 398 return 0; 399 400 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { 401 pr_err("error unbinding cooling dev\n"); 402 return -EINVAL; 403 } 404 return 0; 405 } 406 407 static inline void acerhdf_revert_to_bios_mode(void) 408 { 409 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 410 kernelmode = 0; 411 if (thz_dev) 412 thz_dev->polling_delay = 0; 413 pr_notice("kernel mode fan control OFF\n"); 414 } 415 static inline void acerhdf_enable_kernelmode(void) 416 { 417 kernelmode = 1; 418 419 thz_dev->polling_delay = interval*1000; 420 thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED); 421 pr_notice("kernel mode fan control ON\n"); 422 } 423 424 static int acerhdf_get_mode(struct thermal_zone_device *thermal, 425 enum thermal_device_mode *mode) 426 { 427 if (verbose) 428 pr_notice("kernel mode fan control %d\n", kernelmode); 429 430 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED 431 : THERMAL_DEVICE_DISABLED; 432 433 return 0; 434 } 435 436 /* 437 * set operation mode; 438 * enabled: the thermal layer of the kernel takes care about 439 * the temperature and the fan. 440 * disabled: the BIOS takes control of the fan. 441 */ 442 static int acerhdf_set_mode(struct thermal_zone_device *thermal, 443 enum thermal_device_mode mode) 444 { 445 if (mode == THERMAL_DEVICE_DISABLED && kernelmode) 446 acerhdf_revert_to_bios_mode(); 447 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) 448 acerhdf_enable_kernelmode(); 449 450 return 0; 451 } 452 453 static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, 454 enum thermal_trip_type *type) 455 { 456 if (trip == 0) 457 *type = THERMAL_TRIP_ACTIVE; 458 else if (trip == 1) 459 *type = THERMAL_TRIP_CRITICAL; 460 else 461 return -EINVAL; 462 463 return 0; 464 } 465 466 static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip, 467 int *temp) 468 { 469 if (trip != 0) 470 return -EINVAL; 471 472 *temp = fanon - fanoff; 473 474 return 0; 475 } 476 477 static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, 478 int *temp) 479 { 480 if (trip == 0) 481 *temp = fanon; 482 else if (trip == 1) 483 *temp = ACERHDF_TEMP_CRIT; 484 else 485 return -EINVAL; 486 487 return 0; 488 } 489 490 static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, 491 int *temperature) 492 { 493 *temperature = ACERHDF_TEMP_CRIT; 494 return 0; 495 } 496 497 /* bind callback functions to thermalzone */ 498 static struct thermal_zone_device_ops acerhdf_dev_ops = { 499 .bind = acerhdf_bind, 500 .unbind = acerhdf_unbind, 501 .get_temp = acerhdf_get_ec_temp, 502 .get_mode = acerhdf_get_mode, 503 .set_mode = acerhdf_set_mode, 504 .get_trip_type = acerhdf_get_trip_type, 505 .get_trip_hyst = acerhdf_get_trip_hyst, 506 .get_trip_temp = acerhdf_get_trip_temp, 507 .get_crit_temp = acerhdf_get_crit_temp, 508 }; 509 510 511 /* 512 * cooling device callback functions 513 * get maximal fan cooling state 514 */ 515 static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, 516 unsigned long *state) 517 { 518 *state = 1; 519 520 return 0; 521 } 522 523 static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, 524 unsigned long *state) 525 { 526 int err = 0, tmp; 527 528 err = acerhdf_get_fanstate(&tmp); 529 if (err) 530 return err; 531 532 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; 533 return 0; 534 } 535 536 /* change current fan state - is overwritten when running in kernel mode */ 537 static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, 538 unsigned long state) 539 { 540 int cur_temp, cur_state, err = 0; 541 542 if (!kernelmode) 543 return 0; 544 545 err = acerhdf_get_temp(&cur_temp); 546 if (err) { 547 pr_err("error reading temperature, hand off control to BIOS\n"); 548 goto err_out; 549 } 550 551 err = acerhdf_get_fanstate(&cur_state); 552 if (err) { 553 pr_err("error reading fan state, hand off control to BIOS\n"); 554 goto err_out; 555 } 556 557 if (state == 0) { 558 if (cur_state == ACERHDF_FAN_AUTO) 559 acerhdf_change_fanstate(ACERHDF_FAN_OFF); 560 } else { 561 if (cur_state == ACERHDF_FAN_OFF) 562 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 563 } 564 return 0; 565 566 err_out: 567 acerhdf_revert_to_bios_mode(); 568 return -EINVAL; 569 } 570 571 /* bind fan callbacks to fan device */ 572 static const struct thermal_cooling_device_ops acerhdf_cooling_ops = { 573 .get_max_state = acerhdf_get_max_state, 574 .get_cur_state = acerhdf_get_cur_state, 575 .set_cur_state = acerhdf_set_cur_state, 576 }; 577 578 /* suspend / resume functionality */ 579 static int acerhdf_suspend(struct device *dev) 580 { 581 if (kernelmode) 582 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 583 584 if (verbose) 585 pr_notice("going suspend\n"); 586 587 return 0; 588 } 589 590 static int acerhdf_probe(struct platform_device *device) 591 { 592 return 0; 593 } 594 595 static int acerhdf_remove(struct platform_device *device) 596 { 597 return 0; 598 } 599 600 static const struct dev_pm_ops acerhdf_pm_ops = { 601 .suspend = acerhdf_suspend, 602 .freeze = acerhdf_suspend, 603 }; 604 605 static struct platform_driver acerhdf_driver = { 606 .driver = { 607 .name = "acerhdf", 608 .pm = &acerhdf_pm_ops, 609 }, 610 .probe = acerhdf_probe, 611 .remove = acerhdf_remove, 612 }; 613 614 /* checks if str begins with start */ 615 static int str_starts_with(const char *str, const char *start) 616 { 617 unsigned long str_len = 0, start_len = 0; 618 619 str_len = strlen(str); 620 start_len = strlen(start); 621 622 if (str_len >= start_len && 623 !strncmp(str, start, start_len)) 624 return 1; 625 626 return 0; 627 } 628 629 /* check hardware */ 630 static int __init acerhdf_check_hardware(void) 631 { 632 char const *vendor, *version, *product; 633 const struct bios_settings *bt = NULL; 634 int found = 0; 635 636 /* get BIOS data */ 637 vendor = dmi_get_system_info(DMI_SYS_VENDOR); 638 version = dmi_get_system_info(DMI_BIOS_VERSION); 639 product = dmi_get_system_info(DMI_PRODUCT_NAME); 640 641 if (!vendor || !version || !product) { 642 pr_err("error getting hardware information\n"); 643 return -EINVAL; 644 } 645 646 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); 647 648 if (list_supported) { 649 pr_info("List of supported Manufacturer/Model/BIOS:\n"); 650 pr_info("---------------------------------------------------\n"); 651 for (bt = bios_tbl; bt->vendor[0]; bt++) { 652 pr_info("%-13s | %-17s | %-10s\n", bt->vendor, 653 bt->product, bt->version); 654 } 655 pr_info("---------------------------------------------------\n"); 656 return -ECANCELED; 657 } 658 659 if (force_bios[0]) { 660 version = force_bios; 661 pr_info("forcing BIOS version: %s\n", version); 662 kernelmode = 0; 663 } 664 665 if (force_product[0]) { 666 product = force_product; 667 pr_info("forcing BIOS product: %s\n", product); 668 kernelmode = 0; 669 } 670 671 if (verbose) 672 pr_info("BIOS info: %s %s, product: %s\n", 673 vendor, version, product); 674 675 /* search BIOS version and vendor in BIOS settings table */ 676 for (bt = bios_tbl; bt->vendor[0]; bt++) { 677 /* 678 * check if actual hardware BIOS vendor, product and version 679 * IDs start with the strings of BIOS table entry 680 */ 681 if (str_starts_with(vendor, bt->vendor) && 682 str_starts_with(product, bt->product) && 683 str_starts_with(version, bt->version)) { 684 found = 1; 685 break; 686 } 687 } 688 689 if (!found) { 690 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n", 691 vendor, product, version); 692 return -EINVAL; 693 } 694 695 /* Copy control settings from BIOS table before we free it. */ 696 ctrl_cfg.fanreg = bt->fanreg; 697 ctrl_cfg.tempreg = bt->tempreg; 698 memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd)); 699 ctrl_cfg.mcmd_enable = bt->mcmd_enable; 700 701 /* 702 * if started with kernel mode off, prevent the kernel from switching 703 * off the fan 704 */ 705 if (!kernelmode) { 706 pr_notice("Fan control off, to enable do:\n"); 707 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n"); 708 } 709 710 return 0; 711 } 712 713 static int __init acerhdf_register_platform(void) 714 { 715 int err = 0; 716 717 err = platform_driver_register(&acerhdf_driver); 718 if (err) 719 return err; 720 721 acerhdf_dev = platform_device_alloc("acerhdf", -1); 722 if (!acerhdf_dev) { 723 err = -ENOMEM; 724 goto err_device_alloc; 725 } 726 err = platform_device_add(acerhdf_dev); 727 if (err) 728 goto err_device_add; 729 730 return 0; 731 732 err_device_add: 733 platform_device_put(acerhdf_dev); 734 err_device_alloc: 735 platform_driver_unregister(&acerhdf_driver); 736 return err; 737 } 738 739 static void acerhdf_unregister_platform(void) 740 { 741 platform_device_unregister(acerhdf_dev); 742 platform_driver_unregister(&acerhdf_driver); 743 } 744 745 static int __init acerhdf_register_thermal(void) 746 { 747 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, 748 &acerhdf_cooling_ops); 749 750 if (IS_ERR(cl_dev)) 751 return -EINVAL; 752 753 thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL, 754 &acerhdf_dev_ops, 755 &acerhdf_zone_params, 0, 756 (kernelmode) ? interval*1000 : 0); 757 if (IS_ERR(thz_dev)) 758 return -EINVAL; 759 760 if (strcmp(thz_dev->governor->name, 761 acerhdf_zone_params.governor_name)) { 762 pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n", 763 acerhdf_zone_params.governor_name); 764 return -EINVAL; 765 } 766 767 return 0; 768 } 769 770 static void acerhdf_unregister_thermal(void) 771 { 772 if (cl_dev) { 773 thermal_cooling_device_unregister(cl_dev); 774 cl_dev = NULL; 775 } 776 777 if (thz_dev) { 778 thermal_zone_device_unregister(thz_dev); 779 thz_dev = NULL; 780 } 781 } 782 783 static int __init acerhdf_init(void) 784 { 785 int err = 0; 786 787 err = acerhdf_check_hardware(); 788 if (err) 789 goto out_err; 790 791 err = acerhdf_register_platform(); 792 if (err) 793 goto out_err; 794 795 err = acerhdf_register_thermal(); 796 if (err) 797 goto err_unreg; 798 799 return 0; 800 801 err_unreg: 802 acerhdf_unregister_thermal(); 803 acerhdf_unregister_platform(); 804 805 out_err: 806 return err; 807 } 808 809 static void __exit acerhdf_exit(void) 810 { 811 acerhdf_change_fanstate(ACERHDF_FAN_AUTO); 812 acerhdf_unregister_thermal(); 813 acerhdf_unregister_platform(); 814 } 815 816 MODULE_LICENSE("GPL"); 817 MODULE_AUTHOR("Peter Feuerer"); 818 MODULE_DESCRIPTION("Aspire One temperature and fan driver"); 819 MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); 820 MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:"); 821 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); 822 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); 823 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:"); 824 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:"); 825 MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:"); 826 MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); 827 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:"); 828 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:"); 829 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:"); 830 MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:"); 831 MODULE_ALIAS("dmi:*:*Acer*:TM8573T:"); 832 MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); 833 MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); 834 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); 835 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); 836 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); 837 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:"); 838 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); 839 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:"); 840 MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:"); 841 842 module_init(acerhdf_init); 843 module_exit(acerhdf_exit); 844