1 /* 2 * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) 3 * 4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or (at 12 * your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write to the Free Software Foundation, Inc., 21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 * 25 * This driver fully implements the ACPI thermal policy as described in the 26 * ACPI 2.0 Specification. 27 * 28 * TBD: 1. Implement passive cooling hysteresis. 29 * 2. Enhance passive cooling (CPU) states/limit interface to support 30 * concepts of 'multiple limiters', upper/lower limits, etc. 31 * 32 */ 33 34 #include <linux/kernel.h> 35 #include <linux/module.h> 36 #include <linux/dmi.h> 37 #include <linux/init.h> 38 #include <linux/types.h> 39 #include <linux/proc_fs.h> 40 #include <linux/timer.h> 41 #include <linux/jiffies.h> 42 #include <linux/kmod.h> 43 #include <linux/seq_file.h> 44 #include <linux/reboot.h> 45 #include <asm/uaccess.h> 46 47 #include <acpi/acpi_bus.h> 48 #include <acpi/acpi_drivers.h> 49 50 #define ACPI_THERMAL_COMPONENT 0x04000000 51 #define ACPI_THERMAL_CLASS "thermal_zone" 52 #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" 53 #define ACPI_THERMAL_FILE_STATE "state" 54 #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" 55 #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" 56 #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" 57 #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" 58 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 59 #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 60 #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 61 #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 62 #define ACPI_THERMAL_NOTIFY_HOT 0xF1 63 #define ACPI_THERMAL_MODE_ACTIVE 0x00 64 65 #define ACPI_THERMAL_MAX_ACTIVE 10 66 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 67 68 #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) 69 #define CELSIUS_TO_KELVIN(t) ((t+273)*10) 70 71 #define _COMPONENT ACPI_THERMAL_COMPONENT 72 ACPI_MODULE_NAME("thermal"); 73 74 MODULE_AUTHOR("Paul Diefenbaugh"); 75 MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); 76 MODULE_LICENSE("GPL"); 77 78 static int act; 79 module_param(act, int, 0644); 80 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); 81 82 static int crt; 83 module_param(crt, int, 0644); 84 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); 85 86 static int tzp; 87 module_param(tzp, int, 0444); 88 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); 89 90 static int nocrt; 91 module_param(nocrt, int, 0); 92 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); 93 94 static int off; 95 module_param(off, int, 0); 96 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); 97 98 static int psv; 99 module_param(psv, int, 0644); 100 MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); 101 102 static int acpi_thermal_add(struct acpi_device *device); 103 static int acpi_thermal_remove(struct acpi_device *device, int type); 104 static int acpi_thermal_resume(struct acpi_device *device); 105 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); 106 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); 107 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); 108 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); 109 static ssize_t acpi_thermal_write_cooling_mode(struct file *, 110 const char __user *, size_t, 111 loff_t *); 112 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); 113 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, 114 size_t, loff_t *); 115 116 static const struct acpi_device_id thermal_device_ids[] = { 117 {ACPI_THERMAL_HID, 0}, 118 {"", 0}, 119 }; 120 MODULE_DEVICE_TABLE(acpi, thermal_device_ids); 121 122 static struct acpi_driver acpi_thermal_driver = { 123 .name = "thermal", 124 .class = ACPI_THERMAL_CLASS, 125 .ids = thermal_device_ids, 126 .ops = { 127 .add = acpi_thermal_add, 128 .remove = acpi_thermal_remove, 129 .resume = acpi_thermal_resume, 130 }, 131 }; 132 133 struct acpi_thermal_state { 134 u8 critical:1; 135 u8 hot:1; 136 u8 passive:1; 137 u8 active:1; 138 u8 reserved:4; 139 int active_index; 140 }; 141 142 struct acpi_thermal_state_flags { 143 u8 valid:1; 144 u8 enabled:1; 145 u8 reserved:6; 146 }; 147 148 struct acpi_thermal_critical { 149 struct acpi_thermal_state_flags flags; 150 unsigned long temperature; 151 }; 152 153 struct acpi_thermal_hot { 154 struct acpi_thermal_state_flags flags; 155 unsigned long temperature; 156 }; 157 158 struct acpi_thermal_passive { 159 struct acpi_thermal_state_flags flags; 160 unsigned long temperature; 161 unsigned long tc1; 162 unsigned long tc2; 163 unsigned long tsp; 164 struct acpi_handle_list devices; 165 }; 166 167 struct acpi_thermal_active { 168 struct acpi_thermal_state_flags flags; 169 unsigned long temperature; 170 struct acpi_handle_list devices; 171 }; 172 173 struct acpi_thermal_trips { 174 struct acpi_thermal_critical critical; 175 struct acpi_thermal_hot hot; 176 struct acpi_thermal_passive passive; 177 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; 178 }; 179 180 struct acpi_thermal_flags { 181 u8 cooling_mode:1; /* _SCP */ 182 u8 devices:1; /* _TZD */ 183 u8 reserved:6; 184 }; 185 186 struct acpi_thermal { 187 struct acpi_device * device; 188 acpi_bus_id name; 189 unsigned long temperature; 190 unsigned long last_temperature; 191 unsigned long polling_frequency; 192 volatile u8 zombie; 193 struct acpi_thermal_flags flags; 194 struct acpi_thermal_state state; 195 struct acpi_thermal_trips trips; 196 struct acpi_handle_list devices; 197 struct timer_list timer; 198 }; 199 200 static const struct file_operations acpi_thermal_state_fops = { 201 .open = acpi_thermal_state_open_fs, 202 .read = seq_read, 203 .llseek = seq_lseek, 204 .release = single_release, 205 }; 206 207 static const struct file_operations acpi_thermal_temp_fops = { 208 .open = acpi_thermal_temp_open_fs, 209 .read = seq_read, 210 .llseek = seq_lseek, 211 .release = single_release, 212 }; 213 214 static const struct file_operations acpi_thermal_trip_fops = { 215 .open = acpi_thermal_trip_open_fs, 216 .read = seq_read, 217 .llseek = seq_lseek, 218 .release = single_release, 219 }; 220 221 static const struct file_operations acpi_thermal_cooling_fops = { 222 .open = acpi_thermal_cooling_open_fs, 223 .read = seq_read, 224 .write = acpi_thermal_write_cooling_mode, 225 .llseek = seq_lseek, 226 .release = single_release, 227 }; 228 229 static const struct file_operations acpi_thermal_polling_fops = { 230 .open = acpi_thermal_polling_open_fs, 231 .read = seq_read, 232 .write = acpi_thermal_write_polling, 233 .llseek = seq_lseek, 234 .release = single_release, 235 }; 236 237 /* -------------------------------------------------------------------------- 238 Thermal Zone Management 239 -------------------------------------------------------------------------- */ 240 241 static int acpi_thermal_get_temperature(struct acpi_thermal *tz) 242 { 243 acpi_status status = AE_OK; 244 245 246 if (!tz) 247 return -EINVAL; 248 249 tz->last_temperature = tz->temperature; 250 251 status = 252 acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); 253 if (ACPI_FAILURE(status)) 254 return -ENODEV; 255 256 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", 257 tz->temperature)); 258 259 return 0; 260 } 261 262 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) 263 { 264 acpi_status status = AE_OK; 265 266 267 if (!tz) 268 return -EINVAL; 269 270 status = 271 acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, 272 &tz->polling_frequency); 273 if (ACPI_FAILURE(status)) 274 return -ENODEV; 275 276 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", 277 tz->polling_frequency)); 278 279 return 0; 280 } 281 282 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) 283 { 284 285 if (!tz) 286 return -EINVAL; 287 288 tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ 289 290 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 291 "Polling frequency set to %lu seconds\n", 292 tz->polling_frequency/10)); 293 294 return 0; 295 } 296 297 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) 298 { 299 acpi_status status = AE_OK; 300 union acpi_object arg0 = { ACPI_TYPE_INTEGER }; 301 struct acpi_object_list arg_list = { 1, &arg0 }; 302 acpi_handle handle = NULL; 303 304 305 if (!tz) 306 return -EINVAL; 307 308 status = acpi_get_handle(tz->device->handle, "_SCP", &handle); 309 if (ACPI_FAILURE(status)) { 310 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); 311 return -ENODEV; 312 } 313 314 arg0.integer.value = mode; 315 316 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); 317 if (ACPI_FAILURE(status)) 318 return -ENODEV; 319 320 return 0; 321 } 322 323 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) 324 { 325 acpi_status status = AE_OK; 326 int i = 0; 327 328 329 if (!tz) 330 return -EINVAL; 331 332 /* Critical Shutdown (required) */ 333 334 status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, 335 &tz->trips.critical.temperature); 336 if (ACPI_FAILURE(status)) { 337 tz->trips.critical.flags.valid = 0; 338 ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); 339 return -ENODEV; 340 } else { 341 tz->trips.critical.flags.valid = 1; 342 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 343 "Found critical threshold [%lu]\n", 344 tz->trips.critical.temperature)); 345 } 346 347 if (tz->trips.critical.flags.valid == 1) { 348 if (crt == -1) { 349 tz->trips.critical.flags.valid = 0; 350 } else if (crt > 0) { 351 unsigned long crt_k = CELSIUS_TO_KELVIN(crt); 352 353 /* 354 * Allow override to lower critical threshold 355 */ 356 if (crt_k < tz->trips.critical.temperature) 357 tz->trips.critical.temperature = crt_k; 358 } 359 } 360 361 /* Critical Sleep (optional) */ 362 363 status = 364 acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, 365 &tz->trips.hot.temperature); 366 if (ACPI_FAILURE(status)) { 367 tz->trips.hot.flags.valid = 0; 368 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); 369 } else { 370 tz->trips.hot.flags.valid = 1; 371 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", 372 tz->trips.hot.temperature)); 373 } 374 375 /* Passive: Processors (optional) */ 376 377 if (psv == -1) { 378 status = AE_SUPPORT; 379 } else if (psv > 0) { 380 tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); 381 status = AE_OK; 382 } else { 383 status = acpi_evaluate_integer(tz->device->handle, 384 "_PSV", NULL, &tz->trips.passive.temperature); 385 } 386 387 if (ACPI_FAILURE(status)) { 388 tz->trips.passive.flags.valid = 0; 389 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); 390 } else { 391 tz->trips.passive.flags.valid = 1; 392 393 status = 394 acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, 395 &tz->trips.passive.tc1); 396 if (ACPI_FAILURE(status)) 397 tz->trips.passive.flags.valid = 0; 398 399 status = 400 acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, 401 &tz->trips.passive.tc2); 402 if (ACPI_FAILURE(status)) 403 tz->trips.passive.flags.valid = 0; 404 405 status = 406 acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, 407 &tz->trips.passive.tsp); 408 if (ACPI_FAILURE(status)) 409 tz->trips.passive.flags.valid = 0; 410 411 status = 412 acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, 413 &tz->trips.passive.devices); 414 if (ACPI_FAILURE(status)) 415 tz->trips.passive.flags.valid = 0; 416 417 if (!tz->trips.passive.flags.valid) 418 printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); 419 else 420 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 421 "Found passive threshold [%lu]\n", 422 tz->trips.passive.temperature)); 423 } 424 425 /* Active: Fans, etc. (optional) */ 426 427 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 428 429 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; 430 431 if (act == -1) 432 break; /* disable all active trip points */ 433 434 status = acpi_evaluate_integer(tz->device->handle, 435 name, NULL, &tz->trips.active[i].temperature); 436 437 if (ACPI_FAILURE(status)) { 438 if (i == 0) /* no active trip points */ 439 break; 440 if (act <= 0) /* no override requested */ 441 break; 442 if (i == 1) { /* 1 trip point */ 443 tz->trips.active[0].temperature = 444 CELSIUS_TO_KELVIN(act); 445 } else { /* multiple trips */ 446 /* 447 * Don't allow override higher than 448 * the next higher trip point 449 */ 450 tz->trips.active[i - 1].temperature = 451 (tz->trips.active[i - 2].temperature < 452 CELSIUS_TO_KELVIN(act) ? 453 tz->trips.active[i - 2].temperature : 454 CELSIUS_TO_KELVIN(act)); 455 } 456 break; 457 } 458 459 name[2] = 'L'; 460 status = 461 acpi_evaluate_reference(tz->device->handle, name, NULL, 462 &tz->trips.active[i].devices); 463 if (ACPI_SUCCESS(status)) { 464 tz->trips.active[i].flags.valid = 1; 465 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 466 "Found active threshold [%d]:[%lu]\n", 467 i, tz->trips.active[i].temperature)); 468 } else 469 ACPI_EXCEPTION((AE_INFO, status, 470 "Invalid active threshold [%d]", i)); 471 } 472 473 return 0; 474 } 475 476 static int acpi_thermal_get_devices(struct acpi_thermal *tz) 477 { 478 acpi_status status = AE_OK; 479 480 481 if (!tz) 482 return -EINVAL; 483 484 status = 485 acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); 486 if (ACPI_FAILURE(status)) 487 return -ENODEV; 488 489 return 0; 490 } 491 492 static int acpi_thermal_critical(struct acpi_thermal *tz) 493 { 494 if (!tz || !tz->trips.critical.flags.valid || nocrt) 495 return -EINVAL; 496 497 if (tz->temperature >= tz->trips.critical.temperature) { 498 printk(KERN_WARNING PREFIX "Critical trip point\n"); 499 tz->trips.critical.flags.enabled = 1; 500 } else if (tz->trips.critical.flags.enabled) 501 tz->trips.critical.flags.enabled = 0; 502 503 printk(KERN_EMERG 504 "Critical temperature reached (%ld C), shutting down.\n", 505 KELVIN_TO_CELSIUS(tz->temperature)); 506 acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, 507 tz->trips.critical.flags.enabled); 508 acpi_bus_generate_netlink_event(tz->device->pnp.device_class, 509 tz->device->dev.bus_id, 510 ACPI_THERMAL_NOTIFY_CRITICAL, 511 tz->trips.critical.flags.enabled); 512 513 orderly_poweroff(true); 514 515 return 0; 516 } 517 518 static int acpi_thermal_hot(struct acpi_thermal *tz) 519 { 520 if (!tz || !tz->trips.hot.flags.valid || nocrt) 521 return -EINVAL; 522 523 if (tz->temperature >= tz->trips.hot.temperature) { 524 printk(KERN_WARNING PREFIX "Hot trip point\n"); 525 tz->trips.hot.flags.enabled = 1; 526 } else if (tz->trips.hot.flags.enabled) 527 tz->trips.hot.flags.enabled = 0; 528 529 acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, 530 tz->trips.hot.flags.enabled); 531 acpi_bus_generate_netlink_event(tz->device->pnp.device_class, 532 tz->device->dev.bus_id, 533 ACPI_THERMAL_NOTIFY_HOT, 534 tz->trips.hot.flags.enabled); 535 536 /* TBD: Call user-mode "sleep(S4)" function */ 537 538 return 0; 539 } 540 541 static void acpi_thermal_passive(struct acpi_thermal *tz) 542 { 543 int result = 1; 544 struct acpi_thermal_passive *passive = NULL; 545 int trend = 0; 546 int i = 0; 547 548 549 if (!tz || !tz->trips.passive.flags.valid) 550 return; 551 552 passive = &(tz->trips.passive); 553 554 /* 555 * Above Trip? 556 * ----------- 557 * Calculate the thermal trend (using the passive cooling equation) 558 * and modify the performance limit for all passive cooling devices 559 * accordingly. Note that we assume symmetry. 560 */ 561 if (tz->temperature >= passive->temperature) { 562 trend = 563 (passive->tc1 * (tz->temperature - tz->last_temperature)) + 564 (passive->tc2 * (tz->temperature - passive->temperature)); 565 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 566 "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", 567 trend, passive->tc1, tz->temperature, 568 tz->last_temperature, passive->tc2, 569 tz->temperature, passive->temperature)); 570 passive->flags.enabled = 1; 571 /* Heating up? */ 572 if (trend > 0) 573 for (i = 0; i < passive->devices.count; i++) 574 acpi_processor_set_thermal_limit(passive-> 575 devices. 576 handles[i], 577 ACPI_PROCESSOR_LIMIT_INCREMENT); 578 /* Cooling off? */ 579 else if (trend < 0) { 580 for (i = 0; i < passive->devices.count; i++) 581 /* 582 * assume that we are on highest 583 * freq/lowest thrott and can leave 584 * passive mode, even in error case 585 */ 586 if (!acpi_processor_set_thermal_limit 587 (passive->devices.handles[i], 588 ACPI_PROCESSOR_LIMIT_DECREMENT)) 589 result = 0; 590 /* 591 * Leave cooling mode, even if the temp might 592 * higher than trip point This is because some 593 * machines might have long thermal polling 594 * frequencies (tsp) defined. We will fall back 595 * into passive mode in next cycle (probably quicker) 596 */ 597 if (result) { 598 passive->flags.enabled = 0; 599 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 600 "Disabling passive cooling, still above threshold," 601 " but we are cooling down\n")); 602 } 603 } 604 return; 605 } 606 607 /* 608 * Below Trip? 609 * ----------- 610 * Implement passive cooling hysteresis to slowly increase performance 611 * and avoid thrashing around the passive trip point. Note that we 612 * assume symmetry. 613 */ 614 if (!passive->flags.enabled) 615 return; 616 for (i = 0; i < passive->devices.count; i++) 617 if (!acpi_processor_set_thermal_limit 618 (passive->devices.handles[i], 619 ACPI_PROCESSOR_LIMIT_DECREMENT)) 620 result = 0; 621 if (result) { 622 passive->flags.enabled = 0; 623 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 624 "Disabling passive cooling (zone is cool)\n")); 625 } 626 } 627 628 static void acpi_thermal_active(struct acpi_thermal *tz) 629 { 630 int result = 0; 631 struct acpi_thermal_active *active = NULL; 632 int i = 0; 633 int j = 0; 634 unsigned long maxtemp = 0; 635 636 637 if (!tz) 638 return; 639 640 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 641 active = &(tz->trips.active[i]); 642 if (!active || !active->flags.valid) 643 break; 644 if (tz->temperature >= active->temperature) { 645 /* 646 * Above Threshold? 647 * ---------------- 648 * If not already enabled, turn ON all cooling devices 649 * associated with this active threshold. 650 */ 651 if (active->temperature > maxtemp) 652 tz->state.active_index = i; 653 maxtemp = active->temperature; 654 if (active->flags.enabled) 655 continue; 656 for (j = 0; j < active->devices.count; j++) { 657 result = 658 acpi_bus_set_power(active->devices. 659 handles[j], 660 ACPI_STATE_D0); 661 if (result) { 662 printk(KERN_WARNING PREFIX 663 "Unable to turn cooling device [%p] 'on'\n", 664 active->devices. 665 handles[j]); 666 continue; 667 } 668 active->flags.enabled = 1; 669 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 670 "Cooling device [%p] now 'on'\n", 671 active->devices.handles[j])); 672 } 673 continue; 674 } 675 if (!active->flags.enabled) 676 continue; 677 /* 678 * Below Threshold? 679 * ---------------- 680 * Turn OFF all cooling devices associated with this 681 * threshold. 682 */ 683 for (j = 0; j < active->devices.count; j++) { 684 result = acpi_bus_set_power(active->devices.handles[j], 685 ACPI_STATE_D3); 686 if (result) { 687 printk(KERN_WARNING PREFIX 688 "Unable to turn cooling device [%p] 'off'\n", 689 active->devices.handles[j]); 690 continue; 691 } 692 active->flags.enabled = 0; 693 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 694 "Cooling device [%p] now 'off'\n", 695 active->devices.handles[j])); 696 } 697 } 698 } 699 700 static void acpi_thermal_check(void *context); 701 702 static void acpi_thermal_run(unsigned long data) 703 { 704 struct acpi_thermal *tz = (struct acpi_thermal *)data; 705 if (!tz->zombie) 706 acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); 707 } 708 709 static void acpi_thermal_check(void *data) 710 { 711 int result = 0; 712 struct acpi_thermal *tz = data; 713 unsigned long sleep_time = 0; 714 int i = 0; 715 struct acpi_thermal_state state; 716 717 718 if (!tz) { 719 printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); 720 return; 721 } 722 723 state = tz->state; 724 725 result = acpi_thermal_get_temperature(tz); 726 if (result) 727 return; 728 729 memset(&tz->state, 0, sizeof(tz->state)); 730 731 /* 732 * Check Trip Points 733 * ----------------- 734 * Compare the current temperature to the trip point values to see 735 * if we've entered one of the thermal policy states. Note that 736 * this function determines when a state is entered, but the 737 * individual policy decides when it is exited (e.g. hysteresis). 738 */ 739 if (tz->trips.critical.flags.valid) 740 state.critical |= 741 (tz->temperature >= tz->trips.critical.temperature); 742 if (tz->trips.hot.flags.valid) 743 state.hot |= (tz->temperature >= tz->trips.hot.temperature); 744 if (tz->trips.passive.flags.valid) 745 state.passive |= 746 (tz->temperature >= tz->trips.passive.temperature); 747 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) 748 if (tz->trips.active[i].flags.valid) 749 state.active |= 750 (tz->temperature >= 751 tz->trips.active[i].temperature); 752 753 /* 754 * Invoke Policy 755 * ------------- 756 * Separated from the above check to allow individual policy to 757 * determine when to exit a given state. 758 */ 759 if (state.critical) 760 acpi_thermal_critical(tz); 761 if (state.hot) 762 acpi_thermal_hot(tz); 763 if (state.passive) 764 acpi_thermal_passive(tz); 765 if (state.active) 766 acpi_thermal_active(tz); 767 768 /* 769 * Calculate State 770 * --------------- 771 * Again, separated from the above two to allow independent policy 772 * decisions. 773 */ 774 tz->state.critical = tz->trips.critical.flags.enabled; 775 tz->state.hot = tz->trips.hot.flags.enabled; 776 tz->state.passive = tz->trips.passive.flags.enabled; 777 tz->state.active = 0; 778 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) 779 tz->state.active |= tz->trips.active[i].flags.enabled; 780 781 /* 782 * Calculate Sleep Time 783 * -------------------- 784 * If we're in the passive state, use _TSP's value. Otherwise 785 * use the default polling frequency (e.g. _TZP). If no polling 786 * frequency is specified then we'll wait forever (at least until 787 * a thermal event occurs). Note that _TSP and _TZD values are 788 * given in 1/10th seconds (we must covert to milliseconds). 789 */ 790 if (tz->state.passive) 791 sleep_time = tz->trips.passive.tsp * 100; 792 else if (tz->polling_frequency > 0) 793 sleep_time = tz->polling_frequency * 100; 794 795 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", 796 tz->name, tz->temperature, sleep_time)); 797 798 /* 799 * Schedule Next Poll 800 * ------------------ 801 */ 802 if (!sleep_time) { 803 if (timer_pending(&(tz->timer))) 804 del_timer(&(tz->timer)); 805 } else { 806 if (timer_pending(&(tz->timer))) 807 mod_timer(&(tz->timer), 808 jiffies + (HZ * sleep_time) / 1000); 809 else { 810 tz->timer.data = (unsigned long)tz; 811 tz->timer.function = acpi_thermal_run; 812 tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; 813 add_timer(&(tz->timer)); 814 } 815 } 816 817 return; 818 } 819 820 /* -------------------------------------------------------------------------- 821 FS Interface (/proc) 822 -------------------------------------------------------------------------- */ 823 824 static struct proc_dir_entry *acpi_thermal_dir; 825 826 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) 827 { 828 struct acpi_thermal *tz = seq->private; 829 830 831 if (!tz) 832 goto end; 833 834 seq_puts(seq, "state: "); 835 836 if (!tz->state.critical && !tz->state.hot && !tz->state.passive 837 && !tz->state.active) 838 seq_puts(seq, "ok\n"); 839 else { 840 if (tz->state.critical) 841 seq_puts(seq, "critical "); 842 if (tz->state.hot) 843 seq_puts(seq, "hot "); 844 if (tz->state.passive) 845 seq_puts(seq, "passive "); 846 if (tz->state.active) 847 seq_printf(seq, "active[%d]", tz->state.active_index); 848 seq_puts(seq, "\n"); 849 } 850 851 end: 852 return 0; 853 } 854 855 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) 856 { 857 return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); 858 } 859 860 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) 861 { 862 int result = 0; 863 struct acpi_thermal *tz = seq->private; 864 865 866 if (!tz) 867 goto end; 868 869 result = acpi_thermal_get_temperature(tz); 870 if (result) 871 goto end; 872 873 seq_printf(seq, "temperature: %ld C\n", 874 KELVIN_TO_CELSIUS(tz->temperature)); 875 876 end: 877 return 0; 878 } 879 880 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) 881 { 882 return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); 883 } 884 885 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) 886 { 887 struct acpi_thermal *tz = seq->private; 888 struct acpi_device *device; 889 acpi_status status; 890 891 int i = 0; 892 int j = 0; 893 894 895 if (!tz) 896 goto end; 897 898 if (tz->trips.critical.flags.valid) 899 seq_printf(seq, "critical (S5): %ld C%s", 900 KELVIN_TO_CELSIUS(tz->trips.critical.temperature), 901 nocrt ? " <disabled>\n" : "\n"); 902 903 if (tz->trips.hot.flags.valid) 904 seq_printf(seq, "hot (S4): %ld C%s", 905 KELVIN_TO_CELSIUS(tz->trips.hot.temperature), 906 nocrt ? " <disabled>\n" : "\n"); 907 908 if (tz->trips.passive.flags.valid) { 909 seq_printf(seq, 910 "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", 911 KELVIN_TO_CELSIUS(tz->trips.passive.temperature), 912 tz->trips.passive.tc1, tz->trips.passive.tc2, 913 tz->trips.passive.tsp); 914 for (j = 0; j < tz->trips.passive.devices.count; j++) { 915 status = acpi_bus_get_device(tz->trips.passive.devices. 916 handles[j], &device); 917 seq_printf(seq, "%4.4s ", status ? "" : 918 acpi_device_bid(device)); 919 } 920 seq_puts(seq, "\n"); 921 } 922 923 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 924 if (!(tz->trips.active[i].flags.valid)) 925 break; 926 seq_printf(seq, "active[%d]: %ld C: devices=", 927 i, 928 KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); 929 for (j = 0; j < tz->trips.active[i].devices.count; j++){ 930 status = acpi_bus_get_device(tz->trips.active[i]. 931 devices.handles[j], 932 &device); 933 seq_printf(seq, "%4.4s ", status ? "" : 934 acpi_device_bid(device)); 935 } 936 seq_puts(seq, "\n"); 937 } 938 939 end: 940 return 0; 941 } 942 943 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) 944 { 945 return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); 946 } 947 948 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) 949 { 950 struct acpi_thermal *tz = seq->private; 951 952 953 if (!tz) 954 goto end; 955 956 if (!tz->flags.cooling_mode) 957 seq_puts(seq, "<setting not supported>\n"); 958 else 959 seq_puts(seq, "0 - Active; 1 - Passive\n"); 960 961 end: 962 return 0; 963 } 964 965 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) 966 { 967 return single_open(file, acpi_thermal_cooling_seq_show, 968 PDE(inode)->data); 969 } 970 971 static ssize_t 972 acpi_thermal_write_cooling_mode(struct file *file, 973 const char __user * buffer, 974 size_t count, loff_t * ppos) 975 { 976 struct seq_file *m = file->private_data; 977 struct acpi_thermal *tz = m->private; 978 int result = 0; 979 char mode_string[12] = { '\0' }; 980 981 982 if (!tz || (count > sizeof(mode_string) - 1)) 983 return -EINVAL; 984 985 if (!tz->flags.cooling_mode) 986 return -ENODEV; 987 988 if (copy_from_user(mode_string, buffer, count)) 989 return -EFAULT; 990 991 mode_string[count] = '\0'; 992 993 result = acpi_thermal_set_cooling_mode(tz, 994 simple_strtoul(mode_string, NULL, 995 0)); 996 if (result) 997 return result; 998 999 acpi_thermal_check(tz); 1000 1001 return count; 1002 } 1003 1004 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) 1005 { 1006 struct acpi_thermal *tz = seq->private; 1007 1008 1009 if (!tz) 1010 goto end; 1011 1012 if (!tz->polling_frequency) { 1013 seq_puts(seq, "<polling disabled>\n"); 1014 goto end; 1015 } 1016 1017 seq_printf(seq, "polling frequency: %lu seconds\n", 1018 (tz->polling_frequency / 10)); 1019 1020 end: 1021 return 0; 1022 } 1023 1024 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) 1025 { 1026 return single_open(file, acpi_thermal_polling_seq_show, 1027 PDE(inode)->data); 1028 } 1029 1030 static ssize_t 1031 acpi_thermal_write_polling(struct file *file, 1032 const char __user * buffer, 1033 size_t count, loff_t * ppos) 1034 { 1035 struct seq_file *m = file->private_data; 1036 struct acpi_thermal *tz = m->private; 1037 int result = 0; 1038 char polling_string[12] = { '\0' }; 1039 int seconds = 0; 1040 1041 1042 if (!tz || (count > sizeof(polling_string) - 1)) 1043 return -EINVAL; 1044 1045 if (copy_from_user(polling_string, buffer, count)) 1046 return -EFAULT; 1047 1048 polling_string[count] = '\0'; 1049 1050 seconds = simple_strtoul(polling_string, NULL, 0); 1051 1052 result = acpi_thermal_set_polling(tz, seconds); 1053 if (result) 1054 return result; 1055 1056 acpi_thermal_check(tz); 1057 1058 return count; 1059 } 1060 1061 static int acpi_thermal_add_fs(struct acpi_device *device) 1062 { 1063 struct proc_dir_entry *entry = NULL; 1064 1065 1066 if (!acpi_device_dir(device)) { 1067 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), 1068 acpi_thermal_dir); 1069 if (!acpi_device_dir(device)) 1070 return -ENODEV; 1071 acpi_device_dir(device)->owner = THIS_MODULE; 1072 } 1073 1074 /* 'state' [R] */ 1075 entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, 1076 S_IRUGO, acpi_device_dir(device)); 1077 if (!entry) 1078 return -ENODEV; 1079 else { 1080 entry->proc_fops = &acpi_thermal_state_fops; 1081 entry->data = acpi_driver_data(device); 1082 entry->owner = THIS_MODULE; 1083 } 1084 1085 /* 'temperature' [R] */ 1086 entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, 1087 S_IRUGO, acpi_device_dir(device)); 1088 if (!entry) 1089 return -ENODEV; 1090 else { 1091 entry->proc_fops = &acpi_thermal_temp_fops; 1092 entry->data = acpi_driver_data(device); 1093 entry->owner = THIS_MODULE; 1094 } 1095 1096 /* 'trip_points' [R] */ 1097 entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, 1098 S_IRUGO, 1099 acpi_device_dir(device)); 1100 if (!entry) 1101 return -ENODEV; 1102 else { 1103 entry->proc_fops = &acpi_thermal_trip_fops; 1104 entry->data = acpi_driver_data(device); 1105 entry->owner = THIS_MODULE; 1106 } 1107 1108 /* 'cooling_mode' [R/W] */ 1109 entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, 1110 S_IFREG | S_IRUGO | S_IWUSR, 1111 acpi_device_dir(device)); 1112 if (!entry) 1113 return -ENODEV; 1114 else { 1115 entry->proc_fops = &acpi_thermal_cooling_fops; 1116 entry->data = acpi_driver_data(device); 1117 entry->owner = THIS_MODULE; 1118 } 1119 1120 /* 'polling_frequency' [R/W] */ 1121 entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, 1122 S_IFREG | S_IRUGO | S_IWUSR, 1123 acpi_device_dir(device)); 1124 if (!entry) 1125 return -ENODEV; 1126 else { 1127 entry->proc_fops = &acpi_thermal_polling_fops; 1128 entry->data = acpi_driver_data(device); 1129 entry->owner = THIS_MODULE; 1130 } 1131 1132 return 0; 1133 } 1134 1135 static int acpi_thermal_remove_fs(struct acpi_device *device) 1136 { 1137 1138 if (acpi_device_dir(device)) { 1139 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, 1140 acpi_device_dir(device)); 1141 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, 1142 acpi_device_dir(device)); 1143 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, 1144 acpi_device_dir(device)); 1145 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, 1146 acpi_device_dir(device)); 1147 remove_proc_entry(ACPI_THERMAL_FILE_STATE, 1148 acpi_device_dir(device)); 1149 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); 1150 acpi_device_dir(device) = NULL; 1151 } 1152 1153 return 0; 1154 } 1155 1156 /* -------------------------------------------------------------------------- 1157 Driver Interface 1158 -------------------------------------------------------------------------- */ 1159 1160 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) 1161 { 1162 struct acpi_thermal *tz = data; 1163 struct acpi_device *device = NULL; 1164 1165 1166 if (!tz) 1167 return; 1168 1169 device = tz->device; 1170 1171 switch (event) { 1172 case ACPI_THERMAL_NOTIFY_TEMPERATURE: 1173 acpi_thermal_check(tz); 1174 break; 1175 case ACPI_THERMAL_NOTIFY_THRESHOLDS: 1176 acpi_thermal_get_trip_points(tz); 1177 acpi_thermal_check(tz); 1178 acpi_bus_generate_proc_event(device, event, 0); 1179 acpi_bus_generate_netlink_event(device->pnp.device_class, 1180 device->dev.bus_id, event, 0); 1181 break; 1182 case ACPI_THERMAL_NOTIFY_DEVICES: 1183 if (tz->flags.devices) 1184 acpi_thermal_get_devices(tz); 1185 acpi_bus_generate_proc_event(device, event, 0); 1186 acpi_bus_generate_netlink_event(device->pnp.device_class, 1187 device->dev.bus_id, event, 0); 1188 break; 1189 default: 1190 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1191 "Unsupported event [0x%x]\n", event)); 1192 break; 1193 } 1194 1195 return; 1196 } 1197 1198 static int acpi_thermal_get_info(struct acpi_thermal *tz) 1199 { 1200 int result = 0; 1201 1202 1203 if (!tz) 1204 return -EINVAL; 1205 1206 /* Get temperature [_TMP] (required) */ 1207 result = acpi_thermal_get_temperature(tz); 1208 if (result) 1209 return result; 1210 1211 /* Get trip points [_CRT, _PSV, etc.] (required) */ 1212 result = acpi_thermal_get_trip_points(tz); 1213 if (result) 1214 return result; 1215 1216 /* Set the cooling mode [_SCP] to active cooling (default) */ 1217 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); 1218 if (!result) 1219 tz->flags.cooling_mode = 1; 1220 1221 /* Get default polling frequency [_TZP] (optional) */ 1222 if (tzp) 1223 tz->polling_frequency = tzp; 1224 else 1225 acpi_thermal_get_polling_frequency(tz); 1226 1227 /* Get devices in this thermal zone [_TZD] (optional) */ 1228 result = acpi_thermal_get_devices(tz); 1229 if (!result) 1230 tz->flags.devices = 1; 1231 1232 return 0; 1233 } 1234 1235 static int acpi_thermal_add(struct acpi_device *device) 1236 { 1237 int result = 0; 1238 acpi_status status = AE_OK; 1239 struct acpi_thermal *tz = NULL; 1240 1241 1242 if (!device) 1243 return -EINVAL; 1244 1245 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); 1246 if (!tz) 1247 return -ENOMEM; 1248 1249 tz->device = device; 1250 strcpy(tz->name, device->pnp.bus_id); 1251 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); 1252 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); 1253 acpi_driver_data(device) = tz; 1254 1255 result = acpi_thermal_get_info(tz); 1256 if (result) 1257 goto end; 1258 1259 result = acpi_thermal_add_fs(device); 1260 if (result) 1261 goto end; 1262 1263 init_timer(&tz->timer); 1264 1265 acpi_thermal_check(tz); 1266 1267 status = acpi_install_notify_handler(device->handle, 1268 ACPI_DEVICE_NOTIFY, 1269 acpi_thermal_notify, tz); 1270 if (ACPI_FAILURE(status)) { 1271 result = -ENODEV; 1272 goto end; 1273 } 1274 1275 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", 1276 acpi_device_name(device), acpi_device_bid(device), 1277 KELVIN_TO_CELSIUS(tz->temperature)); 1278 1279 end: 1280 if (result) { 1281 acpi_thermal_remove_fs(device); 1282 kfree(tz); 1283 } 1284 1285 return result; 1286 } 1287 1288 static int acpi_thermal_remove(struct acpi_device *device, int type) 1289 { 1290 acpi_status status = AE_OK; 1291 struct acpi_thermal *tz = NULL; 1292 1293 1294 if (!device || !acpi_driver_data(device)) 1295 return -EINVAL; 1296 1297 tz = acpi_driver_data(device); 1298 1299 /* avoid timer adding new defer task */ 1300 tz->zombie = 1; 1301 /* wait for running timer (on other CPUs) finish */ 1302 del_timer_sync(&(tz->timer)); 1303 /* synchronize deferred task */ 1304 acpi_os_wait_events_complete(NULL); 1305 /* deferred task may reinsert timer */ 1306 del_timer_sync(&(tz->timer)); 1307 1308 status = acpi_remove_notify_handler(device->handle, 1309 ACPI_DEVICE_NOTIFY, 1310 acpi_thermal_notify); 1311 1312 /* Terminate policy */ 1313 if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { 1314 tz->trips.passive.flags.enabled = 0; 1315 acpi_thermal_passive(tz); 1316 } 1317 if (tz->trips.active[0].flags.valid 1318 && tz->trips.active[0].flags.enabled) { 1319 tz->trips.active[0].flags.enabled = 0; 1320 acpi_thermal_active(tz); 1321 } 1322 1323 acpi_thermal_remove_fs(device); 1324 1325 kfree(tz); 1326 return 0; 1327 } 1328 1329 static int acpi_thermal_resume(struct acpi_device *device) 1330 { 1331 struct acpi_thermal *tz = NULL; 1332 int i, j, power_state, result; 1333 1334 1335 if (!device || !acpi_driver_data(device)) 1336 return -EINVAL; 1337 1338 tz = acpi_driver_data(device); 1339 1340 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 1341 if (!(&tz->trips.active[i])) 1342 break; 1343 if (!tz->trips.active[i].flags.valid) 1344 break; 1345 tz->trips.active[i].flags.enabled = 1; 1346 for (j = 0; j < tz->trips.active[i].devices.count; j++) { 1347 result = acpi_bus_get_power(tz->trips.active[i].devices. 1348 handles[j], &power_state); 1349 if (result || (power_state != ACPI_STATE_D0)) { 1350 tz->trips.active[i].flags.enabled = 0; 1351 break; 1352 } 1353 } 1354 tz->state.active |= tz->trips.active[i].flags.enabled; 1355 } 1356 1357 acpi_thermal_check(tz); 1358 1359 return AE_OK; 1360 } 1361 1362 #ifdef CONFIG_DMI 1363 static int thermal_act(const struct dmi_system_id *d) { 1364 1365 if (act == 0) { 1366 printk(KERN_NOTICE "ACPI: %s detected: " 1367 "disabling all active thermal trip points\n", d->ident); 1368 act = -1; 1369 } 1370 return 0; 1371 } 1372 static int thermal_nocrt(const struct dmi_system_id *d) { 1373 1374 printk(KERN_NOTICE "ACPI: %s detected: " 1375 "disabling all critical thermal trip point actions.\n", d->ident); 1376 nocrt = 1; 1377 return 0; 1378 } 1379 static int thermal_tzp(const struct dmi_system_id *d) { 1380 1381 if (tzp == 0) { 1382 printk(KERN_NOTICE "ACPI: %s detected: " 1383 "enabling thermal zone polling\n", d->ident); 1384 tzp = 300; /* 300 dS = 30 Seconds */ 1385 } 1386 return 0; 1387 } 1388 static int thermal_psv(const struct dmi_system_id *d) { 1389 1390 if (psv == 0) { 1391 printk(KERN_NOTICE "ACPI: %s detected: " 1392 "disabling all passive thermal trip points\n", d->ident); 1393 psv = -1; 1394 } 1395 return 0; 1396 } 1397 1398 static struct dmi_system_id thermal_dmi_table[] __initdata = { 1399 /* 1400 * Award BIOS on this AOpen makes thermal control almost worthless. 1401 * http://bugzilla.kernel.org/show_bug.cgi?id=8842 1402 */ 1403 { 1404 .callback = thermal_act, 1405 .ident = "AOpen i915GMm-HFS", 1406 .matches = { 1407 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1408 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1409 }, 1410 }, 1411 { 1412 .callback = thermal_psv, 1413 .ident = "AOpen i915GMm-HFS", 1414 .matches = { 1415 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1416 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1417 }, 1418 }, 1419 { 1420 .callback = thermal_tzp, 1421 .ident = "AOpen i915GMm-HFS", 1422 .matches = { 1423 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1424 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1425 }, 1426 }, 1427 { 1428 .callback = thermal_nocrt, 1429 .ident = "Gigabyte GA-7ZX", 1430 .matches = { 1431 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), 1432 DMI_MATCH(DMI_BOARD_NAME, "7ZX"), 1433 }, 1434 }, 1435 {} 1436 }; 1437 #endif /* CONFIG_DMI */ 1438 1439 static int __init acpi_thermal_init(void) 1440 { 1441 int result = 0; 1442 1443 dmi_check_system(thermal_dmi_table); 1444 1445 if (off) { 1446 printk(KERN_NOTICE "ACPI: thermal control disabled\n"); 1447 return -ENODEV; 1448 } 1449 acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); 1450 if (!acpi_thermal_dir) 1451 return -ENODEV; 1452 acpi_thermal_dir->owner = THIS_MODULE; 1453 1454 result = acpi_bus_register_driver(&acpi_thermal_driver); 1455 if (result < 0) { 1456 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1457 return -ENODEV; 1458 } 1459 1460 return 0; 1461 } 1462 1463 static void __exit acpi_thermal_exit(void) 1464 { 1465 1466 acpi_bus_unregister_driver(&acpi_thermal_driver); 1467 1468 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1469 1470 return; 1471 } 1472 1473 module_init(acpi_thermal_init); 1474 module_exit(acpi_thermal_exit); 1475