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/jiffies.h> 41 #include <linux/kmod.h> 42 #include <linux/seq_file.h> 43 #include <linux/reboot.h> 44 #include <linux/device.h> 45 #include <asm/uaccess.h> 46 #include <linux/thermal.h> 47 #include <acpi/acpi_bus.h> 48 #include <acpi/acpi_drivers.h> 49 50 #define ACPI_THERMAL_CLASS "thermal_zone" 51 #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" 52 #define ACPI_THERMAL_FILE_STATE "state" 53 #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" 54 #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" 55 #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" 56 #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" 57 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 58 #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 59 #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 60 #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 61 #define ACPI_THERMAL_NOTIFY_HOT 0xF1 62 #define ACPI_THERMAL_MODE_ACTIVE 0x00 63 64 #define ACPI_THERMAL_MAX_ACTIVE 10 65 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 66 67 #define _COMPONENT ACPI_THERMAL_COMPONENT 68 ACPI_MODULE_NAME("thermal"); 69 70 MODULE_AUTHOR("Paul Diefenbaugh"); 71 MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); 72 MODULE_LICENSE("GPL"); 73 74 static int act; 75 module_param(act, int, 0644); 76 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); 77 78 static int crt; 79 module_param(crt, int, 0644); 80 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); 81 82 static int tzp; 83 module_param(tzp, int, 0444); 84 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); 85 86 static int nocrt; 87 module_param(nocrt, int, 0); 88 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); 89 90 static int off; 91 module_param(off, int, 0); 92 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); 93 94 static int psv; 95 module_param(psv, int, 0644); 96 MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); 97 98 static int acpi_thermal_add(struct acpi_device *device); 99 static int acpi_thermal_remove(struct acpi_device *device, int type); 100 static int acpi_thermal_resume(struct acpi_device *device); 101 static void acpi_thermal_notify(struct acpi_device *device, u32 event); 102 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); 103 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); 104 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); 105 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); 106 static ssize_t acpi_thermal_write_cooling_mode(struct file *, 107 const char __user *, size_t, 108 loff_t *); 109 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); 110 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, 111 size_t, loff_t *); 112 113 static const struct acpi_device_id thermal_device_ids[] = { 114 {ACPI_THERMAL_HID, 0}, 115 {"", 0}, 116 }; 117 MODULE_DEVICE_TABLE(acpi, thermal_device_ids); 118 119 static struct acpi_driver acpi_thermal_driver = { 120 .name = "thermal", 121 .class = ACPI_THERMAL_CLASS, 122 .ids = thermal_device_ids, 123 .ops = { 124 .add = acpi_thermal_add, 125 .remove = acpi_thermal_remove, 126 .resume = acpi_thermal_resume, 127 .notify = acpi_thermal_notify, 128 }, 129 }; 130 131 struct acpi_thermal_state { 132 u8 critical:1; 133 u8 hot:1; 134 u8 passive:1; 135 u8 active:1; 136 u8 reserved:4; 137 int active_index; 138 }; 139 140 struct acpi_thermal_state_flags { 141 u8 valid:1; 142 u8 enabled:1; 143 u8 reserved:6; 144 }; 145 146 struct acpi_thermal_critical { 147 struct acpi_thermal_state_flags flags; 148 unsigned long temperature; 149 }; 150 151 struct acpi_thermal_hot { 152 struct acpi_thermal_state_flags flags; 153 unsigned long temperature; 154 }; 155 156 struct acpi_thermal_passive { 157 struct acpi_thermal_state_flags flags; 158 unsigned long temperature; 159 unsigned long tc1; 160 unsigned long tc2; 161 unsigned long tsp; 162 struct acpi_handle_list devices; 163 }; 164 165 struct acpi_thermal_active { 166 struct acpi_thermal_state_flags flags; 167 unsigned long temperature; 168 struct acpi_handle_list devices; 169 }; 170 171 struct acpi_thermal_trips { 172 struct acpi_thermal_critical critical; 173 struct acpi_thermal_hot hot; 174 struct acpi_thermal_passive passive; 175 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; 176 }; 177 178 struct acpi_thermal_flags { 179 u8 cooling_mode:1; /* _SCP */ 180 u8 devices:1; /* _TZD */ 181 u8 reserved:6; 182 }; 183 184 struct acpi_thermal { 185 struct acpi_device * device; 186 acpi_bus_id name; 187 unsigned long temperature; 188 unsigned long last_temperature; 189 unsigned long polling_frequency; 190 volatile u8 zombie; 191 struct acpi_thermal_flags flags; 192 struct acpi_thermal_state state; 193 struct acpi_thermal_trips trips; 194 struct acpi_handle_list devices; 195 struct thermal_zone_device *thermal_zone; 196 int tz_enabled; 197 int kelvin_offset; 198 struct mutex lock; 199 }; 200 201 static const struct file_operations acpi_thermal_state_fops = { 202 .owner = THIS_MODULE, 203 .open = acpi_thermal_state_open_fs, 204 .read = seq_read, 205 .llseek = seq_lseek, 206 .release = single_release, 207 }; 208 209 static const struct file_operations acpi_thermal_temp_fops = { 210 .owner = THIS_MODULE, 211 .open = acpi_thermal_temp_open_fs, 212 .read = seq_read, 213 .llseek = seq_lseek, 214 .release = single_release, 215 }; 216 217 static const struct file_operations acpi_thermal_trip_fops = { 218 .owner = THIS_MODULE, 219 .open = acpi_thermal_trip_open_fs, 220 .read = seq_read, 221 .llseek = seq_lseek, 222 .release = single_release, 223 }; 224 225 static const struct file_operations acpi_thermal_cooling_fops = { 226 .owner = THIS_MODULE, 227 .open = acpi_thermal_cooling_open_fs, 228 .read = seq_read, 229 .write = acpi_thermal_write_cooling_mode, 230 .llseek = seq_lseek, 231 .release = single_release, 232 }; 233 234 static const struct file_operations acpi_thermal_polling_fops = { 235 .owner = THIS_MODULE, 236 .open = acpi_thermal_polling_open_fs, 237 .read = seq_read, 238 .write = acpi_thermal_write_polling, 239 .llseek = seq_lseek, 240 .release = single_release, 241 }; 242 243 /* -------------------------------------------------------------------------- 244 Thermal Zone Management 245 -------------------------------------------------------------------------- */ 246 247 static int acpi_thermal_get_temperature(struct acpi_thermal *tz) 248 { 249 acpi_status status = AE_OK; 250 unsigned long long tmp; 251 252 if (!tz) 253 return -EINVAL; 254 255 tz->last_temperature = tz->temperature; 256 257 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); 258 if (ACPI_FAILURE(status)) 259 return -ENODEV; 260 261 tz->temperature = tmp; 262 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", 263 tz->temperature)); 264 265 return 0; 266 } 267 268 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) 269 { 270 acpi_status status = AE_OK; 271 unsigned long long tmp; 272 273 if (!tz) 274 return -EINVAL; 275 276 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); 277 if (ACPI_FAILURE(status)) 278 return -ENODEV; 279 280 tz->polling_frequency = tmp; 281 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", 282 tz->polling_frequency)); 283 284 return 0; 285 } 286 287 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) 288 { 289 290 if (!tz) 291 return -EINVAL; 292 293 tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ 294 295 tz->thermal_zone->polling_delay = seconds * 1000; 296 297 if (tz->tz_enabled) 298 thermal_zone_device_update(tz->thermal_zone); 299 300 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 301 "Polling frequency set to %lu seconds\n", 302 tz->polling_frequency/10)); 303 304 return 0; 305 } 306 307 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) 308 { 309 acpi_status status = AE_OK; 310 union acpi_object arg0 = { ACPI_TYPE_INTEGER }; 311 struct acpi_object_list arg_list = { 1, &arg0 }; 312 acpi_handle handle = NULL; 313 314 315 if (!tz) 316 return -EINVAL; 317 318 status = acpi_get_handle(tz->device->handle, "_SCP", &handle); 319 if (ACPI_FAILURE(status)) { 320 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); 321 return -ENODEV; 322 } 323 324 arg0.integer.value = mode; 325 326 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); 327 if (ACPI_FAILURE(status)) 328 return -ENODEV; 329 330 return 0; 331 } 332 333 #define ACPI_TRIPS_CRITICAL 0x01 334 #define ACPI_TRIPS_HOT 0x02 335 #define ACPI_TRIPS_PASSIVE 0x04 336 #define ACPI_TRIPS_ACTIVE 0x08 337 #define ACPI_TRIPS_DEVICES 0x10 338 339 #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) 340 #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES 341 342 #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ 343 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ 344 ACPI_TRIPS_DEVICES) 345 346 /* 347 * This exception is thrown out in two cases: 348 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid 349 * when re-evaluating the AML code. 350 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. 351 * We need to re-bind the cooling devices of a thermal zone when this occurs. 352 */ 353 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ 354 do { \ 355 if (flags != ACPI_TRIPS_INIT) \ 356 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ 357 "ACPI thermal trip point %s changed\n" \ 358 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ 359 } while (0) 360 361 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) 362 { 363 acpi_status status = AE_OK; 364 unsigned long long tmp; 365 struct acpi_handle_list devices; 366 int valid = 0; 367 int i; 368 369 /* Critical Shutdown (required) */ 370 if (flag & ACPI_TRIPS_CRITICAL) { 371 status = acpi_evaluate_integer(tz->device->handle, 372 "_CRT", NULL, &tmp); 373 tz->trips.critical.temperature = tmp; 374 /* 375 * Treat freezing temperatures as invalid as well; some 376 * BIOSes return really low values and cause reboots at startup. 377 * Below zero (Celsius) values clearly aren't right for sure.. 378 * ... so lets discard those as invalid. 379 */ 380 if (ACPI_FAILURE(status) || 381 tz->trips.critical.temperature <= 2732) { 382 tz->trips.critical.flags.valid = 0; 383 ACPI_EXCEPTION((AE_INFO, status, 384 "No or invalid critical threshold")); 385 return -ENODEV; 386 } else { 387 tz->trips.critical.flags.valid = 1; 388 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 389 "Found critical threshold [%lu]\n", 390 tz->trips.critical.temperature)); 391 } 392 if (tz->trips.critical.flags.valid == 1) { 393 if (crt == -1) { 394 tz->trips.critical.flags.valid = 0; 395 } else if (crt > 0) { 396 unsigned long crt_k = CELSIUS_TO_KELVIN(crt); 397 /* 398 * Allow override critical threshold 399 */ 400 if (crt_k > tz->trips.critical.temperature) 401 printk(KERN_WARNING PREFIX 402 "Critical threshold %d C\n", crt); 403 tz->trips.critical.temperature = crt_k; 404 } 405 } 406 } 407 408 /* Critical Sleep (optional) */ 409 if (flag & ACPI_TRIPS_HOT) { 410 status = acpi_evaluate_integer(tz->device->handle, 411 "_HOT", NULL, &tmp); 412 if (ACPI_FAILURE(status)) { 413 tz->trips.hot.flags.valid = 0; 414 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 415 "No hot threshold\n")); 416 } else { 417 tz->trips.hot.temperature = tmp; 418 tz->trips.hot.flags.valid = 1; 419 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 420 "Found hot threshold [%lu]\n", 421 tz->trips.critical.temperature)); 422 } 423 } 424 425 /* Passive (optional) */ 426 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || 427 (flag == ACPI_TRIPS_INIT)) { 428 valid = tz->trips.passive.flags.valid; 429 if (psv == -1) { 430 status = AE_SUPPORT; 431 } else if (psv > 0) { 432 tmp = CELSIUS_TO_KELVIN(psv); 433 status = AE_OK; 434 } else { 435 status = acpi_evaluate_integer(tz->device->handle, 436 "_PSV", NULL, &tmp); 437 } 438 439 if (ACPI_FAILURE(status)) 440 tz->trips.passive.flags.valid = 0; 441 else { 442 tz->trips.passive.temperature = tmp; 443 tz->trips.passive.flags.valid = 1; 444 if (flag == ACPI_TRIPS_INIT) { 445 status = acpi_evaluate_integer( 446 tz->device->handle, "_TC1", 447 NULL, &tmp); 448 if (ACPI_FAILURE(status)) 449 tz->trips.passive.flags.valid = 0; 450 else 451 tz->trips.passive.tc1 = tmp; 452 status = acpi_evaluate_integer( 453 tz->device->handle, "_TC2", 454 NULL, &tmp); 455 if (ACPI_FAILURE(status)) 456 tz->trips.passive.flags.valid = 0; 457 else 458 tz->trips.passive.tc2 = tmp; 459 status = acpi_evaluate_integer( 460 tz->device->handle, "_TSP", 461 NULL, &tmp); 462 if (ACPI_FAILURE(status)) 463 tz->trips.passive.flags.valid = 0; 464 else 465 tz->trips.passive.tsp = tmp; 466 } 467 } 468 } 469 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { 470 memset(&devices, 0, sizeof(struct acpi_handle_list)); 471 status = acpi_evaluate_reference(tz->device->handle, "_PSL", 472 NULL, &devices); 473 if (ACPI_FAILURE(status)) { 474 printk(KERN_WARNING PREFIX 475 "Invalid passive threshold\n"); 476 tz->trips.passive.flags.valid = 0; 477 } 478 else 479 tz->trips.passive.flags.valid = 1; 480 481 if (memcmp(&tz->trips.passive.devices, &devices, 482 sizeof(struct acpi_handle_list))) { 483 memcpy(&tz->trips.passive.devices, &devices, 484 sizeof(struct acpi_handle_list)); 485 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 486 } 487 } 488 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { 489 if (valid != tz->trips.passive.flags.valid) 490 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); 491 } 492 493 /* Active (optional) */ 494 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 495 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; 496 valid = tz->trips.active[i].flags.valid; 497 498 if (act == -1) 499 break; /* disable all active trip points */ 500 501 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && 502 tz->trips.active[i].flags.valid)) { 503 status = acpi_evaluate_integer(tz->device->handle, 504 name, NULL, &tmp); 505 if (ACPI_FAILURE(status)) { 506 tz->trips.active[i].flags.valid = 0; 507 if (i == 0) 508 break; 509 if (act <= 0) 510 break; 511 if (i == 1) 512 tz->trips.active[0].temperature = 513 CELSIUS_TO_KELVIN(act); 514 else 515 /* 516 * Don't allow override higher than 517 * the next higher trip point 518 */ 519 tz->trips.active[i - 1].temperature = 520 (tz->trips.active[i - 2].temperature < 521 CELSIUS_TO_KELVIN(act) ? 522 tz->trips.active[i - 2].temperature : 523 CELSIUS_TO_KELVIN(act)); 524 break; 525 } else { 526 tz->trips.active[i].temperature = tmp; 527 tz->trips.active[i].flags.valid = 1; 528 } 529 } 530 531 name[2] = 'L'; 532 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { 533 memset(&devices, 0, sizeof(struct acpi_handle_list)); 534 status = acpi_evaluate_reference(tz->device->handle, 535 name, NULL, &devices); 536 if (ACPI_FAILURE(status)) { 537 printk(KERN_WARNING PREFIX 538 "Invalid active%d threshold\n", i); 539 tz->trips.active[i].flags.valid = 0; 540 } 541 else 542 tz->trips.active[i].flags.valid = 1; 543 544 if (memcmp(&tz->trips.active[i].devices, &devices, 545 sizeof(struct acpi_handle_list))) { 546 memcpy(&tz->trips.active[i].devices, &devices, 547 sizeof(struct acpi_handle_list)); 548 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 549 } 550 } 551 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) 552 if (valid != tz->trips.active[i].flags.valid) 553 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); 554 555 if (!tz->trips.active[i].flags.valid) 556 break; 557 } 558 559 if (flag & ACPI_TRIPS_DEVICES) { 560 memset(&devices, 0, sizeof(struct acpi_handle_list)); 561 status = acpi_evaluate_reference(tz->device->handle, "_TZD", 562 NULL, &devices); 563 if (memcmp(&tz->devices, &devices, 564 sizeof(struct acpi_handle_list))) { 565 memcpy(&tz->devices, &devices, 566 sizeof(struct acpi_handle_list)); 567 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 568 } 569 } 570 571 return 0; 572 } 573 574 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) 575 { 576 return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); 577 } 578 579 static void acpi_thermal_check(void *data) 580 { 581 struct acpi_thermal *tz = data; 582 583 thermal_zone_device_update(tz->thermal_zone); 584 } 585 586 /* sys I/F for generic thermal sysfs support */ 587 #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) 588 589 static int thermal_get_temp(struct thermal_zone_device *thermal, 590 unsigned long *temp) 591 { 592 struct acpi_thermal *tz = thermal->devdata; 593 int result; 594 595 if (!tz) 596 return -EINVAL; 597 598 result = acpi_thermal_get_temperature(tz); 599 if (result) 600 return result; 601 602 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); 603 return 0; 604 } 605 606 static const char enabled[] = "kernel"; 607 static const char disabled[] = "user"; 608 static int thermal_get_mode(struct thermal_zone_device *thermal, 609 enum thermal_device_mode *mode) 610 { 611 struct acpi_thermal *tz = thermal->devdata; 612 613 if (!tz) 614 return -EINVAL; 615 616 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : 617 THERMAL_DEVICE_DISABLED; 618 619 return 0; 620 } 621 622 static int thermal_set_mode(struct thermal_zone_device *thermal, 623 enum thermal_device_mode mode) 624 { 625 struct acpi_thermal *tz = thermal->devdata; 626 int enable; 627 628 if (!tz) 629 return -EINVAL; 630 631 /* 632 * enable/disable thermal management from ACPI thermal driver 633 */ 634 if (mode == THERMAL_DEVICE_ENABLED) 635 enable = 1; 636 else if (mode == THERMAL_DEVICE_DISABLED) 637 enable = 0; 638 else 639 return -EINVAL; 640 641 if (enable != tz->tz_enabled) { 642 tz->tz_enabled = enable; 643 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 644 "%s ACPI thermal control\n", 645 tz->tz_enabled ? enabled : disabled)); 646 acpi_thermal_check(tz); 647 } 648 return 0; 649 } 650 651 static int thermal_get_trip_type(struct thermal_zone_device *thermal, 652 int trip, enum thermal_trip_type *type) 653 { 654 struct acpi_thermal *tz = thermal->devdata; 655 int i; 656 657 if (!tz || trip < 0) 658 return -EINVAL; 659 660 if (tz->trips.critical.flags.valid) { 661 if (!trip) { 662 *type = THERMAL_TRIP_CRITICAL; 663 return 0; 664 } 665 trip--; 666 } 667 668 if (tz->trips.hot.flags.valid) { 669 if (!trip) { 670 *type = THERMAL_TRIP_HOT; 671 return 0; 672 } 673 trip--; 674 } 675 676 if (tz->trips.passive.flags.valid) { 677 if (!trip) { 678 *type = THERMAL_TRIP_PASSIVE; 679 return 0; 680 } 681 trip--; 682 } 683 684 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 685 tz->trips.active[i].flags.valid; i++) { 686 if (!trip) { 687 *type = THERMAL_TRIP_ACTIVE; 688 return 0; 689 } 690 trip--; 691 } 692 693 return -EINVAL; 694 } 695 696 static int thermal_get_trip_temp(struct thermal_zone_device *thermal, 697 int trip, unsigned long *temp) 698 { 699 struct acpi_thermal *tz = thermal->devdata; 700 int i; 701 702 if (!tz || trip < 0) 703 return -EINVAL; 704 705 if (tz->trips.critical.flags.valid) { 706 if (!trip) { 707 *temp = KELVIN_TO_MILLICELSIUS( 708 tz->trips.critical.temperature, 709 tz->kelvin_offset); 710 return 0; 711 } 712 trip--; 713 } 714 715 if (tz->trips.hot.flags.valid) { 716 if (!trip) { 717 *temp = KELVIN_TO_MILLICELSIUS( 718 tz->trips.hot.temperature, 719 tz->kelvin_offset); 720 return 0; 721 } 722 trip--; 723 } 724 725 if (tz->trips.passive.flags.valid) { 726 if (!trip) { 727 *temp = KELVIN_TO_MILLICELSIUS( 728 tz->trips.passive.temperature, 729 tz->kelvin_offset); 730 return 0; 731 } 732 trip--; 733 } 734 735 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 736 tz->trips.active[i].flags.valid; i++) { 737 if (!trip) { 738 *temp = KELVIN_TO_MILLICELSIUS( 739 tz->trips.active[i].temperature, 740 tz->kelvin_offset); 741 return 0; 742 } 743 trip--; 744 } 745 746 return -EINVAL; 747 } 748 749 static int thermal_get_crit_temp(struct thermal_zone_device *thermal, 750 unsigned long *temperature) { 751 struct acpi_thermal *tz = thermal->devdata; 752 753 if (tz->trips.critical.flags.valid) { 754 *temperature = KELVIN_TO_MILLICELSIUS( 755 tz->trips.critical.temperature, 756 tz->kelvin_offset); 757 return 0; 758 } else 759 return -EINVAL; 760 } 761 762 static int thermal_notify(struct thermal_zone_device *thermal, int trip, 763 enum thermal_trip_type trip_type) 764 { 765 u8 type = 0; 766 struct acpi_thermal *tz = thermal->devdata; 767 768 if (trip_type == THERMAL_TRIP_CRITICAL) 769 type = ACPI_THERMAL_NOTIFY_CRITICAL; 770 else if (trip_type == THERMAL_TRIP_HOT) 771 type = ACPI_THERMAL_NOTIFY_HOT; 772 else 773 return 0; 774 775 acpi_bus_generate_proc_event(tz->device, type, 1); 776 acpi_bus_generate_netlink_event(tz->device->pnp.device_class, 777 dev_name(&tz->device->dev), type, 1); 778 779 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) 780 return 1; 781 782 return 0; 783 } 784 785 typedef int (*cb)(struct thermal_zone_device *, int, 786 struct thermal_cooling_device *); 787 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, 788 struct thermal_cooling_device *cdev, 789 cb action) 790 { 791 struct acpi_device *device = cdev->devdata; 792 struct acpi_thermal *tz = thermal->devdata; 793 struct acpi_device *dev; 794 acpi_status status; 795 acpi_handle handle; 796 int i; 797 int j; 798 int trip = -1; 799 int result = 0; 800 801 if (tz->trips.critical.flags.valid) 802 trip++; 803 804 if (tz->trips.hot.flags.valid) 805 trip++; 806 807 if (tz->trips.passive.flags.valid) { 808 trip++; 809 for (i = 0; i < tz->trips.passive.devices.count; 810 i++) { 811 handle = tz->trips.passive.devices.handles[i]; 812 status = acpi_bus_get_device(handle, &dev); 813 if (ACPI_SUCCESS(status) && (dev == device)) { 814 result = action(thermal, trip, cdev); 815 if (result) 816 goto failed; 817 } 818 } 819 } 820 821 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 822 if (!tz->trips.active[i].flags.valid) 823 break; 824 trip++; 825 for (j = 0; 826 j < tz->trips.active[i].devices.count; 827 j++) { 828 handle = tz->trips.active[i].devices.handles[j]; 829 status = acpi_bus_get_device(handle, &dev); 830 if (ACPI_SUCCESS(status) && (dev == device)) { 831 result = action(thermal, trip, cdev); 832 if (result) 833 goto failed; 834 } 835 } 836 } 837 838 for (i = 0; i < tz->devices.count; i++) { 839 handle = tz->devices.handles[i]; 840 status = acpi_bus_get_device(handle, &dev); 841 if (ACPI_SUCCESS(status) && (dev == device)) { 842 result = action(thermal, -1, cdev); 843 if (result) 844 goto failed; 845 } 846 } 847 848 failed: 849 return result; 850 } 851 852 static int 853 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, 854 struct thermal_cooling_device *cdev) 855 { 856 return acpi_thermal_cooling_device_cb(thermal, cdev, 857 thermal_zone_bind_cooling_device); 858 } 859 860 static int 861 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, 862 struct thermal_cooling_device *cdev) 863 { 864 return acpi_thermal_cooling_device_cb(thermal, cdev, 865 thermal_zone_unbind_cooling_device); 866 } 867 868 static struct thermal_zone_device_ops acpi_thermal_zone_ops = { 869 .bind = acpi_thermal_bind_cooling_device, 870 .unbind = acpi_thermal_unbind_cooling_device, 871 .get_temp = thermal_get_temp, 872 .get_mode = thermal_get_mode, 873 .set_mode = thermal_set_mode, 874 .get_trip_type = thermal_get_trip_type, 875 .get_trip_temp = thermal_get_trip_temp, 876 .get_crit_temp = thermal_get_crit_temp, 877 .notify = thermal_notify, 878 }; 879 880 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) 881 { 882 int trips = 0; 883 int result; 884 acpi_status status; 885 int i; 886 887 if (tz->trips.critical.flags.valid) 888 trips++; 889 890 if (tz->trips.hot.flags.valid) 891 trips++; 892 893 if (tz->trips.passive.flags.valid) 894 trips++; 895 896 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 897 tz->trips.active[i].flags.valid; i++, trips++); 898 899 if (tz->trips.passive.flags.valid) 900 tz->thermal_zone = 901 thermal_zone_device_register("acpitz", trips, tz, 902 &acpi_thermal_zone_ops, 903 tz->trips.passive.tc1, 904 tz->trips.passive.tc2, 905 tz->trips.passive.tsp*100, 906 tz->polling_frequency*100); 907 else 908 tz->thermal_zone = 909 thermal_zone_device_register("acpitz", trips, tz, 910 &acpi_thermal_zone_ops, 911 0, 0, 0, 912 tz->polling_frequency*100); 913 if (IS_ERR(tz->thermal_zone)) 914 return -ENODEV; 915 916 result = sysfs_create_link(&tz->device->dev.kobj, 917 &tz->thermal_zone->device.kobj, "thermal_zone"); 918 if (result) 919 return result; 920 921 result = sysfs_create_link(&tz->thermal_zone->device.kobj, 922 &tz->device->dev.kobj, "device"); 923 if (result) 924 return result; 925 926 status = acpi_attach_data(tz->device->handle, 927 acpi_bus_private_data_handler, 928 tz->thermal_zone); 929 if (ACPI_FAILURE(status)) { 930 printk(KERN_ERR PREFIX 931 "Error attaching device data\n"); 932 return -ENODEV; 933 } 934 935 tz->tz_enabled = 1; 936 937 dev_info(&tz->device->dev, "registered as thermal_zone%d\n", 938 tz->thermal_zone->id); 939 return 0; 940 } 941 942 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) 943 { 944 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); 945 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); 946 thermal_zone_device_unregister(tz->thermal_zone); 947 tz->thermal_zone = NULL; 948 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); 949 } 950 951 952 /* -------------------------------------------------------------------------- 953 FS Interface (/proc) 954 -------------------------------------------------------------------------- */ 955 956 static struct proc_dir_entry *acpi_thermal_dir; 957 958 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) 959 { 960 struct acpi_thermal *tz = seq->private; 961 962 963 if (!tz) 964 goto end; 965 966 seq_puts(seq, "state: "); 967 968 if (!tz->state.critical && !tz->state.hot && !tz->state.passive 969 && !tz->state.active) 970 seq_puts(seq, "ok\n"); 971 else { 972 if (tz->state.critical) 973 seq_puts(seq, "critical "); 974 if (tz->state.hot) 975 seq_puts(seq, "hot "); 976 if (tz->state.passive) 977 seq_puts(seq, "passive "); 978 if (tz->state.active) 979 seq_printf(seq, "active[%d]", tz->state.active_index); 980 seq_puts(seq, "\n"); 981 } 982 983 end: 984 return 0; 985 } 986 987 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) 988 { 989 return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); 990 } 991 992 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) 993 { 994 int result = 0; 995 struct acpi_thermal *tz = seq->private; 996 997 998 if (!tz) 999 goto end; 1000 1001 result = acpi_thermal_get_temperature(tz); 1002 if (result) 1003 goto end; 1004 1005 seq_printf(seq, "temperature: %ld C\n", 1006 KELVIN_TO_CELSIUS(tz->temperature)); 1007 1008 end: 1009 return 0; 1010 } 1011 1012 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) 1013 { 1014 return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); 1015 } 1016 1017 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) 1018 { 1019 struct acpi_thermal *tz = seq->private; 1020 struct acpi_device *device; 1021 acpi_status status; 1022 1023 int i = 0; 1024 int j = 0; 1025 1026 1027 if (!tz) 1028 goto end; 1029 1030 if (tz->trips.critical.flags.valid) 1031 seq_printf(seq, "critical (S5): %ld C%s", 1032 KELVIN_TO_CELSIUS(tz->trips.critical.temperature), 1033 nocrt ? " <disabled>\n" : "\n"); 1034 1035 if (tz->trips.hot.flags.valid) 1036 seq_printf(seq, "hot (S4): %ld C%s", 1037 KELVIN_TO_CELSIUS(tz->trips.hot.temperature), 1038 nocrt ? " <disabled>\n" : "\n"); 1039 1040 if (tz->trips.passive.flags.valid) { 1041 seq_printf(seq, 1042 "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", 1043 KELVIN_TO_CELSIUS(tz->trips.passive.temperature), 1044 tz->trips.passive.tc1, tz->trips.passive.tc2, 1045 tz->trips.passive.tsp); 1046 for (j = 0; j < tz->trips.passive.devices.count; j++) { 1047 status = acpi_bus_get_device(tz->trips.passive.devices. 1048 handles[j], &device); 1049 seq_printf(seq, "%4.4s ", status ? "" : 1050 acpi_device_bid(device)); 1051 } 1052 seq_puts(seq, "\n"); 1053 } 1054 1055 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 1056 if (!(tz->trips.active[i].flags.valid)) 1057 break; 1058 seq_printf(seq, "active[%d]: %ld C: devices=", 1059 i, 1060 KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); 1061 for (j = 0; j < tz->trips.active[i].devices.count; j++){ 1062 status = acpi_bus_get_device(tz->trips.active[i]. 1063 devices.handles[j], 1064 &device); 1065 seq_printf(seq, "%4.4s ", status ? "" : 1066 acpi_device_bid(device)); 1067 } 1068 seq_puts(seq, "\n"); 1069 } 1070 1071 end: 1072 return 0; 1073 } 1074 1075 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) 1076 { 1077 return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); 1078 } 1079 1080 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) 1081 { 1082 struct acpi_thermal *tz = seq->private; 1083 1084 1085 if (!tz) 1086 goto end; 1087 1088 if (!tz->flags.cooling_mode) 1089 seq_puts(seq, "<setting not supported>\n"); 1090 else 1091 seq_puts(seq, "0 - Active; 1 - Passive\n"); 1092 1093 end: 1094 return 0; 1095 } 1096 1097 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) 1098 { 1099 return single_open(file, acpi_thermal_cooling_seq_show, 1100 PDE(inode)->data); 1101 } 1102 1103 static ssize_t 1104 acpi_thermal_write_cooling_mode(struct file *file, 1105 const char __user * buffer, 1106 size_t count, loff_t * ppos) 1107 { 1108 struct seq_file *m = file->private_data; 1109 struct acpi_thermal *tz = m->private; 1110 int result = 0; 1111 char mode_string[12] = { '\0' }; 1112 1113 1114 if (!tz || (count > sizeof(mode_string) - 1)) 1115 return -EINVAL; 1116 1117 if (!tz->flags.cooling_mode) 1118 return -ENODEV; 1119 1120 if (copy_from_user(mode_string, buffer, count)) 1121 return -EFAULT; 1122 1123 mode_string[count] = '\0'; 1124 1125 result = acpi_thermal_set_cooling_mode(tz, 1126 simple_strtoul(mode_string, NULL, 1127 0)); 1128 if (result) 1129 return result; 1130 1131 acpi_thermal_check(tz); 1132 1133 return count; 1134 } 1135 1136 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) 1137 { 1138 struct acpi_thermal *tz = seq->private; 1139 1140 1141 if (!tz) 1142 goto end; 1143 1144 if (!tz->thermal_zone->polling_delay) { 1145 seq_puts(seq, "<polling disabled>\n"); 1146 goto end; 1147 } 1148 1149 seq_printf(seq, "polling frequency: %d seconds\n", 1150 (tz->thermal_zone->polling_delay / 1000)); 1151 1152 end: 1153 return 0; 1154 } 1155 1156 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) 1157 { 1158 return single_open(file, acpi_thermal_polling_seq_show, 1159 PDE(inode)->data); 1160 } 1161 1162 static ssize_t 1163 acpi_thermal_write_polling(struct file *file, 1164 const char __user * buffer, 1165 size_t count, loff_t * ppos) 1166 { 1167 struct seq_file *m = file->private_data; 1168 struct acpi_thermal *tz = m->private; 1169 int result = 0; 1170 char polling_string[12] = { '\0' }; 1171 int seconds = 0; 1172 1173 1174 if (!tz || (count > sizeof(polling_string) - 1)) 1175 return -EINVAL; 1176 1177 if (copy_from_user(polling_string, buffer, count)) 1178 return -EFAULT; 1179 1180 polling_string[count] = '\0'; 1181 1182 seconds = simple_strtoul(polling_string, NULL, 0); 1183 1184 result = acpi_thermal_set_polling(tz, seconds); 1185 if (result) 1186 return result; 1187 1188 acpi_thermal_check(tz); 1189 1190 return count; 1191 } 1192 1193 static int acpi_thermal_add_fs(struct acpi_device *device) 1194 { 1195 struct proc_dir_entry *entry = NULL; 1196 1197 1198 if (!acpi_device_dir(device)) { 1199 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), 1200 acpi_thermal_dir); 1201 if (!acpi_device_dir(device)) 1202 return -ENODEV; 1203 } 1204 1205 /* 'state' [R] */ 1206 entry = proc_create_data(ACPI_THERMAL_FILE_STATE, 1207 S_IRUGO, acpi_device_dir(device), 1208 &acpi_thermal_state_fops, 1209 acpi_driver_data(device)); 1210 if (!entry) 1211 return -ENODEV; 1212 1213 /* 'temperature' [R] */ 1214 entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, 1215 S_IRUGO, acpi_device_dir(device), 1216 &acpi_thermal_temp_fops, 1217 acpi_driver_data(device)); 1218 if (!entry) 1219 return -ENODEV; 1220 1221 /* 'trip_points' [R] */ 1222 entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, 1223 S_IRUGO, 1224 acpi_device_dir(device), 1225 &acpi_thermal_trip_fops, 1226 acpi_driver_data(device)); 1227 if (!entry) 1228 return -ENODEV; 1229 1230 /* 'cooling_mode' [R/W] */ 1231 entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, 1232 S_IFREG | S_IRUGO | S_IWUSR, 1233 acpi_device_dir(device), 1234 &acpi_thermal_cooling_fops, 1235 acpi_driver_data(device)); 1236 if (!entry) 1237 return -ENODEV; 1238 1239 /* 'polling_frequency' [R/W] */ 1240 entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, 1241 S_IFREG | S_IRUGO | S_IWUSR, 1242 acpi_device_dir(device), 1243 &acpi_thermal_polling_fops, 1244 acpi_driver_data(device)); 1245 if (!entry) 1246 return -ENODEV; 1247 return 0; 1248 } 1249 1250 static int acpi_thermal_remove_fs(struct acpi_device *device) 1251 { 1252 1253 if (acpi_device_dir(device)) { 1254 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, 1255 acpi_device_dir(device)); 1256 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, 1257 acpi_device_dir(device)); 1258 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, 1259 acpi_device_dir(device)); 1260 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, 1261 acpi_device_dir(device)); 1262 remove_proc_entry(ACPI_THERMAL_FILE_STATE, 1263 acpi_device_dir(device)); 1264 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); 1265 acpi_device_dir(device) = NULL; 1266 } 1267 1268 return 0; 1269 } 1270 1271 /* -------------------------------------------------------------------------- 1272 Driver Interface 1273 -------------------------------------------------------------------------- */ 1274 1275 static void acpi_thermal_notify(struct acpi_device *device, u32 event) 1276 { 1277 struct acpi_thermal *tz = acpi_driver_data(device); 1278 1279 1280 if (!tz) 1281 return; 1282 1283 switch (event) { 1284 case ACPI_THERMAL_NOTIFY_TEMPERATURE: 1285 acpi_thermal_check(tz); 1286 break; 1287 case ACPI_THERMAL_NOTIFY_THRESHOLDS: 1288 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); 1289 acpi_thermal_check(tz); 1290 acpi_bus_generate_proc_event(device, event, 0); 1291 acpi_bus_generate_netlink_event(device->pnp.device_class, 1292 dev_name(&device->dev), event, 0); 1293 break; 1294 case ACPI_THERMAL_NOTIFY_DEVICES: 1295 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); 1296 acpi_thermal_check(tz); 1297 acpi_bus_generate_proc_event(device, event, 0); 1298 acpi_bus_generate_netlink_event(device->pnp.device_class, 1299 dev_name(&device->dev), event, 0); 1300 break; 1301 default: 1302 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1303 "Unsupported event [0x%x]\n", event)); 1304 break; 1305 } 1306 } 1307 1308 static int acpi_thermal_get_info(struct acpi_thermal *tz) 1309 { 1310 int result = 0; 1311 1312 1313 if (!tz) 1314 return -EINVAL; 1315 1316 /* Get temperature [_TMP] (required) */ 1317 result = acpi_thermal_get_temperature(tz); 1318 if (result) 1319 return result; 1320 1321 /* Get trip points [_CRT, _PSV, etc.] (required) */ 1322 result = acpi_thermal_get_trip_points(tz); 1323 if (result) 1324 return result; 1325 1326 /* Set the cooling mode [_SCP] to active cooling (default) */ 1327 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); 1328 if (!result) 1329 tz->flags.cooling_mode = 1; 1330 1331 /* Get default polling frequency [_TZP] (optional) */ 1332 if (tzp) 1333 tz->polling_frequency = tzp; 1334 else 1335 acpi_thermal_get_polling_frequency(tz); 1336 1337 return 0; 1338 } 1339 1340 /* 1341 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI 1342 * handles temperature values with a single decimal place. As a consequence, 1343 * some implementations use an offset of 273.1 and others use an offset of 1344 * 273.2. Try to find out which one is being used, to present the most 1345 * accurate and visually appealing number. 1346 * 1347 * The heuristic below should work for all ACPI thermal zones which have a 1348 * critical trip point with a value being a multiple of 0.5 degree Celsius. 1349 */ 1350 static void acpi_thermal_guess_offset(struct acpi_thermal *tz) 1351 { 1352 if (tz->trips.critical.flags.valid && 1353 (tz->trips.critical.temperature % 5) == 1) 1354 tz->kelvin_offset = 2731; 1355 else 1356 tz->kelvin_offset = 2732; 1357 } 1358 1359 static int acpi_thermal_add(struct acpi_device *device) 1360 { 1361 int result = 0; 1362 struct acpi_thermal *tz = NULL; 1363 1364 1365 if (!device) 1366 return -EINVAL; 1367 1368 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); 1369 if (!tz) 1370 return -ENOMEM; 1371 1372 tz->device = device; 1373 strcpy(tz->name, device->pnp.bus_id); 1374 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); 1375 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); 1376 device->driver_data = tz; 1377 mutex_init(&tz->lock); 1378 1379 1380 result = acpi_thermal_get_info(tz); 1381 if (result) 1382 goto free_memory; 1383 1384 acpi_thermal_guess_offset(tz); 1385 1386 result = acpi_thermal_register_thermal_zone(tz); 1387 if (result) 1388 goto free_memory; 1389 1390 result = acpi_thermal_add_fs(device); 1391 if (result) 1392 goto unregister_thermal_zone; 1393 1394 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", 1395 acpi_device_name(device), acpi_device_bid(device), 1396 KELVIN_TO_CELSIUS(tz->temperature)); 1397 goto end; 1398 1399 unregister_thermal_zone: 1400 thermal_zone_device_unregister(tz->thermal_zone); 1401 free_memory: 1402 kfree(tz); 1403 end: 1404 return result; 1405 } 1406 1407 static int acpi_thermal_remove(struct acpi_device *device, int type) 1408 { 1409 struct acpi_thermal *tz = NULL; 1410 1411 if (!device || !acpi_driver_data(device)) 1412 return -EINVAL; 1413 1414 tz = acpi_driver_data(device); 1415 1416 acpi_thermal_remove_fs(device); 1417 acpi_thermal_unregister_thermal_zone(tz); 1418 mutex_destroy(&tz->lock); 1419 kfree(tz); 1420 return 0; 1421 } 1422 1423 static int acpi_thermal_resume(struct acpi_device *device) 1424 { 1425 struct acpi_thermal *tz = NULL; 1426 int i, j, power_state, result; 1427 1428 1429 if (!device || !acpi_driver_data(device)) 1430 return -EINVAL; 1431 1432 tz = acpi_driver_data(device); 1433 1434 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 1435 if (!(&tz->trips.active[i])) 1436 break; 1437 if (!tz->trips.active[i].flags.valid) 1438 break; 1439 tz->trips.active[i].flags.enabled = 1; 1440 for (j = 0; j < tz->trips.active[i].devices.count; j++) { 1441 result = acpi_bus_get_power(tz->trips.active[i].devices. 1442 handles[j], &power_state); 1443 if (result || (power_state != ACPI_STATE_D0)) { 1444 tz->trips.active[i].flags.enabled = 0; 1445 break; 1446 } 1447 } 1448 tz->state.active |= tz->trips.active[i].flags.enabled; 1449 } 1450 1451 acpi_thermal_check(tz); 1452 1453 return AE_OK; 1454 } 1455 1456 static int thermal_act(const struct dmi_system_id *d) { 1457 1458 if (act == 0) { 1459 printk(KERN_NOTICE "ACPI: %s detected: " 1460 "disabling all active thermal trip points\n", d->ident); 1461 act = -1; 1462 } 1463 return 0; 1464 } 1465 static int thermal_nocrt(const struct dmi_system_id *d) { 1466 1467 printk(KERN_NOTICE "ACPI: %s detected: " 1468 "disabling all critical thermal trip point actions.\n", d->ident); 1469 nocrt = 1; 1470 return 0; 1471 } 1472 static int thermal_tzp(const struct dmi_system_id *d) { 1473 1474 if (tzp == 0) { 1475 printk(KERN_NOTICE "ACPI: %s detected: " 1476 "enabling thermal zone polling\n", d->ident); 1477 tzp = 300; /* 300 dS = 30 Seconds */ 1478 } 1479 return 0; 1480 } 1481 static int thermal_psv(const struct dmi_system_id *d) { 1482 1483 if (psv == 0) { 1484 printk(KERN_NOTICE "ACPI: %s detected: " 1485 "disabling all passive thermal trip points\n", d->ident); 1486 psv = -1; 1487 } 1488 return 0; 1489 } 1490 1491 static struct dmi_system_id thermal_dmi_table[] __initdata = { 1492 /* 1493 * Award BIOS on this AOpen makes thermal control almost worthless. 1494 * http://bugzilla.kernel.org/show_bug.cgi?id=8842 1495 */ 1496 { 1497 .callback = thermal_act, 1498 .ident = "AOpen i915GMm-HFS", 1499 .matches = { 1500 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1501 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1502 }, 1503 }, 1504 { 1505 .callback = thermal_psv, 1506 .ident = "AOpen i915GMm-HFS", 1507 .matches = { 1508 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1509 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1510 }, 1511 }, 1512 { 1513 .callback = thermal_tzp, 1514 .ident = "AOpen i915GMm-HFS", 1515 .matches = { 1516 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1517 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1518 }, 1519 }, 1520 { 1521 .callback = thermal_nocrt, 1522 .ident = "Gigabyte GA-7ZX", 1523 .matches = { 1524 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), 1525 DMI_MATCH(DMI_BOARD_NAME, "7ZX"), 1526 }, 1527 }, 1528 {} 1529 }; 1530 1531 static int __init acpi_thermal_init(void) 1532 { 1533 int result = 0; 1534 1535 dmi_check_system(thermal_dmi_table); 1536 1537 if (off) { 1538 printk(KERN_NOTICE "ACPI: thermal control disabled\n"); 1539 return -ENODEV; 1540 } 1541 acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); 1542 if (!acpi_thermal_dir) 1543 return -ENODEV; 1544 1545 result = acpi_bus_register_driver(&acpi_thermal_driver); 1546 if (result < 0) { 1547 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1548 return -ENODEV; 1549 } 1550 1551 return 0; 1552 } 1553 1554 static void __exit acpi_thermal_exit(void) 1555 { 1556 1557 acpi_bus_unregister_driver(&acpi_thermal_driver); 1558 1559 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1560 1561 return; 1562 } 1563 1564 module_init(acpi_thermal_init); 1565 module_exit(acpi_thermal_exit); 1566