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 PREFIX "ACPI: " 51 52 #define ACPI_THERMAL_CLASS "thermal_zone" 53 #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" 54 #define ACPI_THERMAL_FILE_STATE "state" 55 #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" 56 #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" 57 #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" 58 #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" 59 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 60 #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 61 #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 62 #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 63 #define ACPI_THERMAL_NOTIFY_HOT 0xF1 64 #define ACPI_THERMAL_MODE_ACTIVE 0x00 65 66 #define ACPI_THERMAL_MAX_ACTIVE 10 67 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 68 69 #define _COMPONENT ACPI_THERMAL_COMPONENT 70 ACPI_MODULE_NAME("thermal"); 71 72 MODULE_AUTHOR("Paul Diefenbaugh"); 73 MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); 74 MODULE_LICENSE("GPL"); 75 76 static int act; 77 module_param(act, int, 0644); 78 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); 79 80 static int crt; 81 module_param(crt, int, 0644); 82 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); 83 84 static int tzp; 85 module_param(tzp, int, 0444); 86 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); 87 88 static int nocrt; 89 module_param(nocrt, int, 0); 90 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); 91 92 static int off; 93 module_param(off, int, 0); 94 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); 95 96 static int psv; 97 module_param(psv, int, 0644); 98 MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); 99 100 static int acpi_thermal_add(struct acpi_device *device); 101 static int acpi_thermal_remove(struct acpi_device *device, int type); 102 static int acpi_thermal_resume(struct acpi_device *device); 103 static void acpi_thermal_notify(struct acpi_device *device, u32 event); 104 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); 105 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); 106 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); 107 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); 108 static ssize_t acpi_thermal_write_cooling_mode(struct file *, 109 const char __user *, size_t, 110 loff_t *); 111 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); 112 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, 113 size_t, loff_t *); 114 115 static const struct acpi_device_id thermal_device_ids[] = { 116 {ACPI_THERMAL_HID, 0}, 117 {"", 0}, 118 }; 119 MODULE_DEVICE_TABLE(acpi, thermal_device_ids); 120 121 static struct acpi_driver acpi_thermal_driver = { 122 .name = "thermal", 123 .class = ACPI_THERMAL_CLASS, 124 .ids = thermal_device_ids, 125 .ops = { 126 .add = acpi_thermal_add, 127 .remove = acpi_thermal_remove, 128 .resume = acpi_thermal_resume, 129 .notify = acpi_thermal_notify, 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 thermal_zone_device *thermal_zone; 198 int tz_enabled; 199 int kelvin_offset; 200 struct mutex lock; 201 }; 202 203 static const struct file_operations acpi_thermal_state_fops = { 204 .owner = THIS_MODULE, 205 .open = acpi_thermal_state_open_fs, 206 .read = seq_read, 207 .llseek = seq_lseek, 208 .release = single_release, 209 }; 210 211 static const struct file_operations acpi_thermal_temp_fops = { 212 .owner = THIS_MODULE, 213 .open = acpi_thermal_temp_open_fs, 214 .read = seq_read, 215 .llseek = seq_lseek, 216 .release = single_release, 217 }; 218 219 static const struct file_operations acpi_thermal_trip_fops = { 220 .owner = THIS_MODULE, 221 .open = acpi_thermal_trip_open_fs, 222 .read = seq_read, 223 .llseek = seq_lseek, 224 .release = single_release, 225 }; 226 227 static const struct file_operations acpi_thermal_cooling_fops = { 228 .owner = THIS_MODULE, 229 .open = acpi_thermal_cooling_open_fs, 230 .read = seq_read, 231 .write = acpi_thermal_write_cooling_mode, 232 .llseek = seq_lseek, 233 .release = single_release, 234 }; 235 236 static const struct file_operations acpi_thermal_polling_fops = { 237 .owner = THIS_MODULE, 238 .open = acpi_thermal_polling_open_fs, 239 .read = seq_read, 240 .write = acpi_thermal_write_polling, 241 .llseek = seq_lseek, 242 .release = single_release, 243 }; 244 245 /* -------------------------------------------------------------------------- 246 Thermal Zone Management 247 -------------------------------------------------------------------------- */ 248 249 static int acpi_thermal_get_temperature(struct acpi_thermal *tz) 250 { 251 acpi_status status = AE_OK; 252 unsigned long long tmp; 253 254 if (!tz) 255 return -EINVAL; 256 257 tz->last_temperature = tz->temperature; 258 259 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); 260 if (ACPI_FAILURE(status)) 261 return -ENODEV; 262 263 tz->temperature = tmp; 264 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", 265 tz->temperature)); 266 267 return 0; 268 } 269 270 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) 271 { 272 acpi_status status = AE_OK; 273 unsigned long long tmp; 274 275 if (!tz) 276 return -EINVAL; 277 278 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); 279 if (ACPI_FAILURE(status)) 280 return -ENODEV; 281 282 tz->polling_frequency = tmp; 283 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", 284 tz->polling_frequency)); 285 286 return 0; 287 } 288 289 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) 290 { 291 292 if (!tz) 293 return -EINVAL; 294 295 tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ 296 297 tz->thermal_zone->polling_delay = seconds * 1000; 298 299 if (tz->tz_enabled) 300 thermal_zone_device_update(tz->thermal_zone); 301 302 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 303 "Polling frequency set to %lu seconds\n", 304 tz->polling_frequency/10)); 305 306 return 0; 307 } 308 309 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) 310 { 311 acpi_status status = AE_OK; 312 union acpi_object arg0 = { ACPI_TYPE_INTEGER }; 313 struct acpi_object_list arg_list = { 1, &arg0 }; 314 acpi_handle handle = NULL; 315 316 317 if (!tz) 318 return -EINVAL; 319 320 status = acpi_get_handle(tz->device->handle, "_SCP", &handle); 321 if (ACPI_FAILURE(status)) { 322 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); 323 return -ENODEV; 324 } 325 326 arg0.integer.value = mode; 327 328 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); 329 if (ACPI_FAILURE(status)) 330 return -ENODEV; 331 332 return 0; 333 } 334 335 #define ACPI_TRIPS_CRITICAL 0x01 336 #define ACPI_TRIPS_HOT 0x02 337 #define ACPI_TRIPS_PASSIVE 0x04 338 #define ACPI_TRIPS_ACTIVE 0x08 339 #define ACPI_TRIPS_DEVICES 0x10 340 341 #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) 342 #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES 343 344 #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ 345 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ 346 ACPI_TRIPS_DEVICES) 347 348 /* 349 * This exception is thrown out in two cases: 350 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid 351 * when re-evaluating the AML code. 352 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. 353 * We need to re-bind the cooling devices of a thermal zone when this occurs. 354 */ 355 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ 356 do { \ 357 if (flags != ACPI_TRIPS_INIT) \ 358 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ 359 "ACPI thermal trip point %s changed\n" \ 360 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ 361 } while (0) 362 363 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) 364 { 365 acpi_status status = AE_OK; 366 unsigned long long tmp; 367 struct acpi_handle_list devices; 368 int valid = 0; 369 int i; 370 371 /* Critical Shutdown (required) */ 372 if (flag & ACPI_TRIPS_CRITICAL) { 373 status = acpi_evaluate_integer(tz->device->handle, 374 "_CRT", NULL, &tmp); 375 tz->trips.critical.temperature = tmp; 376 /* 377 * Treat freezing temperatures as invalid as well; some 378 * BIOSes return really low values and cause reboots at startup. 379 * Below zero (Celsius) values clearly aren't right for sure.. 380 * ... so lets discard those as invalid. 381 */ 382 if (ACPI_FAILURE(status) || 383 tz->trips.critical.temperature <= 2732) { 384 tz->trips.critical.flags.valid = 0; 385 ACPI_EXCEPTION((AE_INFO, status, 386 "No or invalid critical threshold")); 387 return -ENODEV; 388 } else { 389 tz->trips.critical.flags.valid = 1; 390 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 391 "Found critical threshold [%lu]\n", 392 tz->trips.critical.temperature)); 393 } 394 if (tz->trips.critical.flags.valid == 1) { 395 if (crt == -1) { 396 tz->trips.critical.flags.valid = 0; 397 } else if (crt > 0) { 398 unsigned long crt_k = CELSIUS_TO_KELVIN(crt); 399 /* 400 * Allow override critical threshold 401 */ 402 if (crt_k > tz->trips.critical.temperature) 403 printk(KERN_WARNING PREFIX 404 "Critical threshold %d C\n", crt); 405 tz->trips.critical.temperature = crt_k; 406 } 407 } 408 } 409 410 /* Critical Sleep (optional) */ 411 if (flag & ACPI_TRIPS_HOT) { 412 status = acpi_evaluate_integer(tz->device->handle, 413 "_HOT", NULL, &tmp); 414 if (ACPI_FAILURE(status)) { 415 tz->trips.hot.flags.valid = 0; 416 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 417 "No hot threshold\n")); 418 } else { 419 tz->trips.hot.temperature = tmp; 420 tz->trips.hot.flags.valid = 1; 421 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 422 "Found hot threshold [%lu]\n", 423 tz->trips.critical.temperature)); 424 } 425 } 426 427 /* Passive (optional) */ 428 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || 429 (flag == ACPI_TRIPS_INIT)) { 430 valid = tz->trips.passive.flags.valid; 431 if (psv == -1) { 432 status = AE_SUPPORT; 433 } else if (psv > 0) { 434 tmp = CELSIUS_TO_KELVIN(psv); 435 status = AE_OK; 436 } else { 437 status = acpi_evaluate_integer(tz->device->handle, 438 "_PSV", NULL, &tmp); 439 } 440 441 if (ACPI_FAILURE(status)) 442 tz->trips.passive.flags.valid = 0; 443 else { 444 tz->trips.passive.temperature = tmp; 445 tz->trips.passive.flags.valid = 1; 446 if (flag == ACPI_TRIPS_INIT) { 447 status = acpi_evaluate_integer( 448 tz->device->handle, "_TC1", 449 NULL, &tmp); 450 if (ACPI_FAILURE(status)) 451 tz->trips.passive.flags.valid = 0; 452 else 453 tz->trips.passive.tc1 = tmp; 454 status = acpi_evaluate_integer( 455 tz->device->handle, "_TC2", 456 NULL, &tmp); 457 if (ACPI_FAILURE(status)) 458 tz->trips.passive.flags.valid = 0; 459 else 460 tz->trips.passive.tc2 = tmp; 461 status = acpi_evaluate_integer( 462 tz->device->handle, "_TSP", 463 NULL, &tmp); 464 if (ACPI_FAILURE(status)) 465 tz->trips.passive.flags.valid = 0; 466 else 467 tz->trips.passive.tsp = tmp; 468 } 469 } 470 } 471 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { 472 memset(&devices, 0, sizeof(struct acpi_handle_list)); 473 status = acpi_evaluate_reference(tz->device->handle, "_PSL", 474 NULL, &devices); 475 if (ACPI_FAILURE(status)) { 476 printk(KERN_WARNING PREFIX 477 "Invalid passive threshold\n"); 478 tz->trips.passive.flags.valid = 0; 479 } 480 else 481 tz->trips.passive.flags.valid = 1; 482 483 if (memcmp(&tz->trips.passive.devices, &devices, 484 sizeof(struct acpi_handle_list))) { 485 memcpy(&tz->trips.passive.devices, &devices, 486 sizeof(struct acpi_handle_list)); 487 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 488 } 489 } 490 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { 491 if (valid != tz->trips.passive.flags.valid) 492 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); 493 } 494 495 /* Active (optional) */ 496 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 497 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; 498 valid = tz->trips.active[i].flags.valid; 499 500 if (act == -1) 501 break; /* disable all active trip points */ 502 503 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && 504 tz->trips.active[i].flags.valid)) { 505 status = acpi_evaluate_integer(tz->device->handle, 506 name, NULL, &tmp); 507 if (ACPI_FAILURE(status)) { 508 tz->trips.active[i].flags.valid = 0; 509 if (i == 0) 510 break; 511 if (act <= 0) 512 break; 513 if (i == 1) 514 tz->trips.active[0].temperature = 515 CELSIUS_TO_KELVIN(act); 516 else 517 /* 518 * Don't allow override higher than 519 * the next higher trip point 520 */ 521 tz->trips.active[i - 1].temperature = 522 (tz->trips.active[i - 2].temperature < 523 CELSIUS_TO_KELVIN(act) ? 524 tz->trips.active[i - 2].temperature : 525 CELSIUS_TO_KELVIN(act)); 526 break; 527 } else { 528 tz->trips.active[i].temperature = tmp; 529 tz->trips.active[i].flags.valid = 1; 530 } 531 } 532 533 name[2] = 'L'; 534 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { 535 memset(&devices, 0, sizeof(struct acpi_handle_list)); 536 status = acpi_evaluate_reference(tz->device->handle, 537 name, NULL, &devices); 538 if (ACPI_FAILURE(status)) { 539 printk(KERN_WARNING PREFIX 540 "Invalid active%d threshold\n", i); 541 tz->trips.active[i].flags.valid = 0; 542 } 543 else 544 tz->trips.active[i].flags.valid = 1; 545 546 if (memcmp(&tz->trips.active[i].devices, &devices, 547 sizeof(struct acpi_handle_list))) { 548 memcpy(&tz->trips.active[i].devices, &devices, 549 sizeof(struct acpi_handle_list)); 550 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 551 } 552 } 553 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) 554 if (valid != tz->trips.active[i].flags.valid) 555 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); 556 557 if (!tz->trips.active[i].flags.valid) 558 break; 559 } 560 561 if (flag & ACPI_TRIPS_DEVICES) { 562 memset(&devices, 0, sizeof(struct acpi_handle_list)); 563 status = acpi_evaluate_reference(tz->device->handle, "_TZD", 564 NULL, &devices); 565 if (memcmp(&tz->devices, &devices, 566 sizeof(struct acpi_handle_list))) { 567 memcpy(&tz->devices, &devices, 568 sizeof(struct acpi_handle_list)); 569 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); 570 } 571 } 572 573 return 0; 574 } 575 576 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) 577 { 578 return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); 579 } 580 581 static void acpi_thermal_check(void *data) 582 { 583 struct acpi_thermal *tz = data; 584 585 thermal_zone_device_update(tz->thermal_zone); 586 } 587 588 /* sys I/F for generic thermal sysfs support */ 589 #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) 590 591 static int thermal_get_temp(struct thermal_zone_device *thermal, 592 unsigned long *temp) 593 { 594 struct acpi_thermal *tz = thermal->devdata; 595 int result; 596 597 if (!tz) 598 return -EINVAL; 599 600 result = acpi_thermal_get_temperature(tz); 601 if (result) 602 return result; 603 604 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); 605 return 0; 606 } 607 608 static const char enabled[] = "kernel"; 609 static const char disabled[] = "user"; 610 static int thermal_get_mode(struct thermal_zone_device *thermal, 611 enum thermal_device_mode *mode) 612 { 613 struct acpi_thermal *tz = thermal->devdata; 614 615 if (!tz) 616 return -EINVAL; 617 618 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : 619 THERMAL_DEVICE_DISABLED; 620 621 return 0; 622 } 623 624 static int thermal_set_mode(struct thermal_zone_device *thermal, 625 enum thermal_device_mode mode) 626 { 627 struct acpi_thermal *tz = thermal->devdata; 628 int enable; 629 630 if (!tz) 631 return -EINVAL; 632 633 /* 634 * enable/disable thermal management from ACPI thermal driver 635 */ 636 if (mode == THERMAL_DEVICE_ENABLED) 637 enable = 1; 638 else if (mode == THERMAL_DEVICE_DISABLED) 639 enable = 0; 640 else 641 return -EINVAL; 642 643 if (enable != tz->tz_enabled) { 644 tz->tz_enabled = enable; 645 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 646 "%s ACPI thermal control\n", 647 tz->tz_enabled ? enabled : disabled)); 648 acpi_thermal_check(tz); 649 } 650 return 0; 651 } 652 653 static int thermal_get_trip_type(struct thermal_zone_device *thermal, 654 int trip, enum thermal_trip_type *type) 655 { 656 struct acpi_thermal *tz = thermal->devdata; 657 int i; 658 659 if (!tz || trip < 0) 660 return -EINVAL; 661 662 if (tz->trips.critical.flags.valid) { 663 if (!trip) { 664 *type = THERMAL_TRIP_CRITICAL; 665 return 0; 666 } 667 trip--; 668 } 669 670 if (tz->trips.hot.flags.valid) { 671 if (!trip) { 672 *type = THERMAL_TRIP_HOT; 673 return 0; 674 } 675 trip--; 676 } 677 678 if (tz->trips.passive.flags.valid) { 679 if (!trip) { 680 *type = THERMAL_TRIP_PASSIVE; 681 return 0; 682 } 683 trip--; 684 } 685 686 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 687 tz->trips.active[i].flags.valid; i++) { 688 if (!trip) { 689 *type = THERMAL_TRIP_ACTIVE; 690 return 0; 691 } 692 trip--; 693 } 694 695 return -EINVAL; 696 } 697 698 static int thermal_get_trip_temp(struct thermal_zone_device *thermal, 699 int trip, unsigned long *temp) 700 { 701 struct acpi_thermal *tz = thermal->devdata; 702 int i; 703 704 if (!tz || trip < 0) 705 return -EINVAL; 706 707 if (tz->trips.critical.flags.valid) { 708 if (!trip) { 709 *temp = KELVIN_TO_MILLICELSIUS( 710 tz->trips.critical.temperature, 711 tz->kelvin_offset); 712 return 0; 713 } 714 trip--; 715 } 716 717 if (tz->trips.hot.flags.valid) { 718 if (!trip) { 719 *temp = KELVIN_TO_MILLICELSIUS( 720 tz->trips.hot.temperature, 721 tz->kelvin_offset); 722 return 0; 723 } 724 trip--; 725 } 726 727 if (tz->trips.passive.flags.valid) { 728 if (!trip) { 729 *temp = KELVIN_TO_MILLICELSIUS( 730 tz->trips.passive.temperature, 731 tz->kelvin_offset); 732 return 0; 733 } 734 trip--; 735 } 736 737 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 738 tz->trips.active[i].flags.valid; i++) { 739 if (!trip) { 740 *temp = KELVIN_TO_MILLICELSIUS( 741 tz->trips.active[i].temperature, 742 tz->kelvin_offset); 743 return 0; 744 } 745 trip--; 746 } 747 748 return -EINVAL; 749 } 750 751 static int thermal_get_crit_temp(struct thermal_zone_device *thermal, 752 unsigned long *temperature) { 753 struct acpi_thermal *tz = thermal->devdata; 754 755 if (tz->trips.critical.flags.valid) { 756 *temperature = KELVIN_TO_MILLICELSIUS( 757 tz->trips.critical.temperature, 758 tz->kelvin_offset); 759 return 0; 760 } else 761 return -EINVAL; 762 } 763 764 static int thermal_notify(struct thermal_zone_device *thermal, int trip, 765 enum thermal_trip_type trip_type) 766 { 767 u8 type = 0; 768 struct acpi_thermal *tz = thermal->devdata; 769 770 if (trip_type == THERMAL_TRIP_CRITICAL) 771 type = ACPI_THERMAL_NOTIFY_CRITICAL; 772 else if (trip_type == THERMAL_TRIP_HOT) 773 type = ACPI_THERMAL_NOTIFY_HOT; 774 else 775 return 0; 776 777 acpi_bus_generate_proc_event(tz->device, type, 1); 778 acpi_bus_generate_netlink_event(tz->device->pnp.device_class, 779 dev_name(&tz->device->dev), type, 1); 780 781 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) 782 return 1; 783 784 return 0; 785 } 786 787 typedef int (*cb)(struct thermal_zone_device *, int, 788 struct thermal_cooling_device *); 789 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, 790 struct thermal_cooling_device *cdev, 791 cb action) 792 { 793 struct acpi_device *device = cdev->devdata; 794 struct acpi_thermal *tz = thermal->devdata; 795 struct acpi_device *dev; 796 acpi_status status; 797 acpi_handle handle; 798 int i; 799 int j; 800 int trip = -1; 801 int result = 0; 802 803 if (tz->trips.critical.flags.valid) 804 trip++; 805 806 if (tz->trips.hot.flags.valid) 807 trip++; 808 809 if (tz->trips.passive.flags.valid) { 810 trip++; 811 for (i = 0; i < tz->trips.passive.devices.count; 812 i++) { 813 handle = tz->trips.passive.devices.handles[i]; 814 status = acpi_bus_get_device(handle, &dev); 815 if (ACPI_SUCCESS(status) && (dev == device)) { 816 result = action(thermal, trip, cdev); 817 if (result) 818 goto failed; 819 } 820 } 821 } 822 823 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 824 if (!tz->trips.active[i].flags.valid) 825 break; 826 trip++; 827 for (j = 0; 828 j < tz->trips.active[i].devices.count; 829 j++) { 830 handle = tz->trips.active[i].devices.handles[j]; 831 status = acpi_bus_get_device(handle, &dev); 832 if (ACPI_SUCCESS(status) && (dev == device)) { 833 result = action(thermal, trip, cdev); 834 if (result) 835 goto failed; 836 } 837 } 838 } 839 840 for (i = 0; i < tz->devices.count; i++) { 841 handle = tz->devices.handles[i]; 842 status = acpi_bus_get_device(handle, &dev); 843 if (ACPI_SUCCESS(status) && (dev == device)) { 844 result = action(thermal, -1, cdev); 845 if (result) 846 goto failed; 847 } 848 } 849 850 failed: 851 return result; 852 } 853 854 static int 855 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, 856 struct thermal_cooling_device *cdev) 857 { 858 return acpi_thermal_cooling_device_cb(thermal, cdev, 859 thermal_zone_bind_cooling_device); 860 } 861 862 static int 863 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, 864 struct thermal_cooling_device *cdev) 865 { 866 return acpi_thermal_cooling_device_cb(thermal, cdev, 867 thermal_zone_unbind_cooling_device); 868 } 869 870 static struct thermal_zone_device_ops acpi_thermal_zone_ops = { 871 .bind = acpi_thermal_bind_cooling_device, 872 .unbind = acpi_thermal_unbind_cooling_device, 873 .get_temp = thermal_get_temp, 874 .get_mode = thermal_get_mode, 875 .set_mode = thermal_set_mode, 876 .get_trip_type = thermal_get_trip_type, 877 .get_trip_temp = thermal_get_trip_temp, 878 .get_crit_temp = thermal_get_crit_temp, 879 .notify = thermal_notify, 880 }; 881 882 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) 883 { 884 int trips = 0; 885 int result; 886 acpi_status status; 887 int i; 888 889 if (tz->trips.critical.flags.valid) 890 trips++; 891 892 if (tz->trips.hot.flags.valid) 893 trips++; 894 895 if (tz->trips.passive.flags.valid) 896 trips++; 897 898 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && 899 tz->trips.active[i].flags.valid; i++, trips++); 900 901 if (tz->trips.passive.flags.valid) 902 tz->thermal_zone = 903 thermal_zone_device_register("acpitz", trips, tz, 904 &acpi_thermal_zone_ops, 905 tz->trips.passive.tc1, 906 tz->trips.passive.tc2, 907 tz->trips.passive.tsp*100, 908 tz->polling_frequency*100); 909 else 910 tz->thermal_zone = 911 thermal_zone_device_register("acpitz", trips, tz, 912 &acpi_thermal_zone_ops, 913 0, 0, 0, 914 tz->polling_frequency*100); 915 if (IS_ERR(tz->thermal_zone)) 916 return -ENODEV; 917 918 result = sysfs_create_link(&tz->device->dev.kobj, 919 &tz->thermal_zone->device.kobj, "thermal_zone"); 920 if (result) 921 return result; 922 923 result = sysfs_create_link(&tz->thermal_zone->device.kobj, 924 &tz->device->dev.kobj, "device"); 925 if (result) 926 return result; 927 928 status = acpi_attach_data(tz->device->handle, 929 acpi_bus_private_data_handler, 930 tz->thermal_zone); 931 if (ACPI_FAILURE(status)) { 932 printk(KERN_ERR PREFIX 933 "Error attaching device data\n"); 934 return -ENODEV; 935 } 936 937 tz->tz_enabled = 1; 938 939 dev_info(&tz->device->dev, "registered as thermal_zone%d\n", 940 tz->thermal_zone->id); 941 return 0; 942 } 943 944 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) 945 { 946 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); 947 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); 948 thermal_zone_device_unregister(tz->thermal_zone); 949 tz->thermal_zone = NULL; 950 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); 951 } 952 953 954 /* -------------------------------------------------------------------------- 955 FS Interface (/proc) 956 -------------------------------------------------------------------------- */ 957 958 static struct proc_dir_entry *acpi_thermal_dir; 959 960 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) 961 { 962 struct acpi_thermal *tz = seq->private; 963 964 965 if (!tz) 966 goto end; 967 968 seq_puts(seq, "state: "); 969 970 if (!tz->state.critical && !tz->state.hot && !tz->state.passive 971 && !tz->state.active) 972 seq_puts(seq, "ok\n"); 973 else { 974 if (tz->state.critical) 975 seq_puts(seq, "critical "); 976 if (tz->state.hot) 977 seq_puts(seq, "hot "); 978 if (tz->state.passive) 979 seq_puts(seq, "passive "); 980 if (tz->state.active) 981 seq_printf(seq, "active[%d]", tz->state.active_index); 982 seq_puts(seq, "\n"); 983 } 984 985 end: 986 return 0; 987 } 988 989 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) 990 { 991 return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); 992 } 993 994 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) 995 { 996 int result = 0; 997 struct acpi_thermal *tz = seq->private; 998 999 1000 if (!tz) 1001 goto end; 1002 1003 result = acpi_thermal_get_temperature(tz); 1004 if (result) 1005 goto end; 1006 1007 seq_printf(seq, "temperature: %ld C\n", 1008 KELVIN_TO_CELSIUS(tz->temperature)); 1009 1010 end: 1011 return 0; 1012 } 1013 1014 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) 1015 { 1016 return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); 1017 } 1018 1019 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) 1020 { 1021 struct acpi_thermal *tz = seq->private; 1022 struct acpi_device *device; 1023 acpi_status status; 1024 1025 int i = 0; 1026 int j = 0; 1027 1028 1029 if (!tz) 1030 goto end; 1031 1032 if (tz->trips.critical.flags.valid) 1033 seq_printf(seq, "critical (S5): %ld C%s", 1034 KELVIN_TO_CELSIUS(tz->trips.critical.temperature), 1035 nocrt ? " <disabled>\n" : "\n"); 1036 1037 if (tz->trips.hot.flags.valid) 1038 seq_printf(seq, "hot (S4): %ld C%s", 1039 KELVIN_TO_CELSIUS(tz->trips.hot.temperature), 1040 nocrt ? " <disabled>\n" : "\n"); 1041 1042 if (tz->trips.passive.flags.valid) { 1043 seq_printf(seq, 1044 "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", 1045 KELVIN_TO_CELSIUS(tz->trips.passive.temperature), 1046 tz->trips.passive.tc1, tz->trips.passive.tc2, 1047 tz->trips.passive.tsp); 1048 for (j = 0; j < tz->trips.passive.devices.count; j++) { 1049 status = acpi_bus_get_device(tz->trips.passive.devices. 1050 handles[j], &device); 1051 seq_printf(seq, "%4.4s ", status ? "" : 1052 acpi_device_bid(device)); 1053 } 1054 seq_puts(seq, "\n"); 1055 } 1056 1057 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 1058 if (!(tz->trips.active[i].flags.valid)) 1059 break; 1060 seq_printf(seq, "active[%d]: %ld C: devices=", 1061 i, 1062 KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); 1063 for (j = 0; j < tz->trips.active[i].devices.count; j++){ 1064 status = acpi_bus_get_device(tz->trips.active[i]. 1065 devices.handles[j], 1066 &device); 1067 seq_printf(seq, "%4.4s ", status ? "" : 1068 acpi_device_bid(device)); 1069 } 1070 seq_puts(seq, "\n"); 1071 } 1072 1073 end: 1074 return 0; 1075 } 1076 1077 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) 1078 { 1079 return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); 1080 } 1081 1082 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) 1083 { 1084 struct acpi_thermal *tz = seq->private; 1085 1086 1087 if (!tz) 1088 goto end; 1089 1090 if (!tz->flags.cooling_mode) 1091 seq_puts(seq, "<setting not supported>\n"); 1092 else 1093 seq_puts(seq, "0 - Active; 1 - Passive\n"); 1094 1095 end: 1096 return 0; 1097 } 1098 1099 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) 1100 { 1101 return single_open(file, acpi_thermal_cooling_seq_show, 1102 PDE(inode)->data); 1103 } 1104 1105 static ssize_t 1106 acpi_thermal_write_cooling_mode(struct file *file, 1107 const char __user * buffer, 1108 size_t count, loff_t * ppos) 1109 { 1110 struct seq_file *m = file->private_data; 1111 struct acpi_thermal *tz = m->private; 1112 int result = 0; 1113 char mode_string[12] = { '\0' }; 1114 1115 1116 if (!tz || (count > sizeof(mode_string) - 1)) 1117 return -EINVAL; 1118 1119 if (!tz->flags.cooling_mode) 1120 return -ENODEV; 1121 1122 if (copy_from_user(mode_string, buffer, count)) 1123 return -EFAULT; 1124 1125 mode_string[count] = '\0'; 1126 1127 result = acpi_thermal_set_cooling_mode(tz, 1128 simple_strtoul(mode_string, NULL, 1129 0)); 1130 if (result) 1131 return result; 1132 1133 acpi_thermal_check(tz); 1134 1135 return count; 1136 } 1137 1138 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) 1139 { 1140 struct acpi_thermal *tz = seq->private; 1141 1142 1143 if (!tz) 1144 goto end; 1145 1146 if (!tz->thermal_zone->polling_delay) { 1147 seq_puts(seq, "<polling disabled>\n"); 1148 goto end; 1149 } 1150 1151 seq_printf(seq, "polling frequency: %d seconds\n", 1152 (tz->thermal_zone->polling_delay / 1000)); 1153 1154 end: 1155 return 0; 1156 } 1157 1158 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) 1159 { 1160 return single_open(file, acpi_thermal_polling_seq_show, 1161 PDE(inode)->data); 1162 } 1163 1164 static ssize_t 1165 acpi_thermal_write_polling(struct file *file, 1166 const char __user * buffer, 1167 size_t count, loff_t * ppos) 1168 { 1169 struct seq_file *m = file->private_data; 1170 struct acpi_thermal *tz = m->private; 1171 int result = 0; 1172 char polling_string[12] = { '\0' }; 1173 int seconds = 0; 1174 1175 1176 if (!tz || (count > sizeof(polling_string) - 1)) 1177 return -EINVAL; 1178 1179 if (copy_from_user(polling_string, buffer, count)) 1180 return -EFAULT; 1181 1182 polling_string[count] = '\0'; 1183 1184 seconds = simple_strtoul(polling_string, NULL, 0); 1185 1186 result = acpi_thermal_set_polling(tz, seconds); 1187 if (result) 1188 return result; 1189 1190 acpi_thermal_check(tz); 1191 1192 return count; 1193 } 1194 1195 static int acpi_thermal_add_fs(struct acpi_device *device) 1196 { 1197 struct proc_dir_entry *entry = NULL; 1198 1199 1200 if (!acpi_device_dir(device)) { 1201 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), 1202 acpi_thermal_dir); 1203 if (!acpi_device_dir(device)) 1204 return -ENODEV; 1205 } 1206 1207 /* 'state' [R] */ 1208 entry = proc_create_data(ACPI_THERMAL_FILE_STATE, 1209 S_IRUGO, acpi_device_dir(device), 1210 &acpi_thermal_state_fops, 1211 acpi_driver_data(device)); 1212 if (!entry) 1213 return -ENODEV; 1214 1215 /* 'temperature' [R] */ 1216 entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, 1217 S_IRUGO, acpi_device_dir(device), 1218 &acpi_thermal_temp_fops, 1219 acpi_driver_data(device)); 1220 if (!entry) 1221 return -ENODEV; 1222 1223 /* 'trip_points' [R] */ 1224 entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, 1225 S_IRUGO, 1226 acpi_device_dir(device), 1227 &acpi_thermal_trip_fops, 1228 acpi_driver_data(device)); 1229 if (!entry) 1230 return -ENODEV; 1231 1232 /* 'cooling_mode' [R/W] */ 1233 entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, 1234 S_IFREG | S_IRUGO | S_IWUSR, 1235 acpi_device_dir(device), 1236 &acpi_thermal_cooling_fops, 1237 acpi_driver_data(device)); 1238 if (!entry) 1239 return -ENODEV; 1240 1241 /* 'polling_frequency' [R/W] */ 1242 entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, 1243 S_IFREG | S_IRUGO | S_IWUSR, 1244 acpi_device_dir(device), 1245 &acpi_thermal_polling_fops, 1246 acpi_driver_data(device)); 1247 if (!entry) 1248 return -ENODEV; 1249 return 0; 1250 } 1251 1252 static int acpi_thermal_remove_fs(struct acpi_device *device) 1253 { 1254 1255 if (acpi_device_dir(device)) { 1256 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, 1257 acpi_device_dir(device)); 1258 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, 1259 acpi_device_dir(device)); 1260 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, 1261 acpi_device_dir(device)); 1262 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, 1263 acpi_device_dir(device)); 1264 remove_proc_entry(ACPI_THERMAL_FILE_STATE, 1265 acpi_device_dir(device)); 1266 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); 1267 acpi_device_dir(device) = NULL; 1268 } 1269 1270 return 0; 1271 } 1272 1273 /* -------------------------------------------------------------------------- 1274 Driver Interface 1275 -------------------------------------------------------------------------- */ 1276 1277 static void acpi_thermal_notify(struct acpi_device *device, u32 event) 1278 { 1279 struct acpi_thermal *tz = acpi_driver_data(device); 1280 1281 1282 if (!tz) 1283 return; 1284 1285 switch (event) { 1286 case ACPI_THERMAL_NOTIFY_TEMPERATURE: 1287 acpi_thermal_check(tz); 1288 break; 1289 case ACPI_THERMAL_NOTIFY_THRESHOLDS: 1290 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); 1291 acpi_thermal_check(tz); 1292 acpi_bus_generate_proc_event(device, event, 0); 1293 acpi_bus_generate_netlink_event(device->pnp.device_class, 1294 dev_name(&device->dev), event, 0); 1295 break; 1296 case ACPI_THERMAL_NOTIFY_DEVICES: 1297 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); 1298 acpi_thermal_check(tz); 1299 acpi_bus_generate_proc_event(device, event, 0); 1300 acpi_bus_generate_netlink_event(device->pnp.device_class, 1301 dev_name(&device->dev), event, 0); 1302 break; 1303 default: 1304 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1305 "Unsupported event [0x%x]\n", event)); 1306 break; 1307 } 1308 } 1309 1310 static int acpi_thermal_get_info(struct acpi_thermal *tz) 1311 { 1312 int result = 0; 1313 1314 1315 if (!tz) 1316 return -EINVAL; 1317 1318 /* Get temperature [_TMP] (required) */ 1319 result = acpi_thermal_get_temperature(tz); 1320 if (result) 1321 return result; 1322 1323 /* Get trip points [_CRT, _PSV, etc.] (required) */ 1324 result = acpi_thermal_get_trip_points(tz); 1325 if (result) 1326 return result; 1327 1328 /* Set the cooling mode [_SCP] to active cooling (default) */ 1329 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); 1330 if (!result) 1331 tz->flags.cooling_mode = 1; 1332 1333 /* Get default polling frequency [_TZP] (optional) */ 1334 if (tzp) 1335 tz->polling_frequency = tzp; 1336 else 1337 acpi_thermal_get_polling_frequency(tz); 1338 1339 return 0; 1340 } 1341 1342 /* 1343 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI 1344 * handles temperature values with a single decimal place. As a consequence, 1345 * some implementations use an offset of 273.1 and others use an offset of 1346 * 273.2. Try to find out which one is being used, to present the most 1347 * accurate and visually appealing number. 1348 * 1349 * The heuristic below should work for all ACPI thermal zones which have a 1350 * critical trip point with a value being a multiple of 0.5 degree Celsius. 1351 */ 1352 static void acpi_thermal_guess_offset(struct acpi_thermal *tz) 1353 { 1354 if (tz->trips.critical.flags.valid && 1355 (tz->trips.critical.temperature % 5) == 1) 1356 tz->kelvin_offset = 2731; 1357 else 1358 tz->kelvin_offset = 2732; 1359 } 1360 1361 static int acpi_thermal_add(struct acpi_device *device) 1362 { 1363 int result = 0; 1364 struct acpi_thermal *tz = NULL; 1365 1366 1367 if (!device) 1368 return -EINVAL; 1369 1370 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); 1371 if (!tz) 1372 return -ENOMEM; 1373 1374 tz->device = device; 1375 strcpy(tz->name, device->pnp.bus_id); 1376 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); 1377 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); 1378 device->driver_data = tz; 1379 mutex_init(&tz->lock); 1380 1381 1382 result = acpi_thermal_get_info(tz); 1383 if (result) 1384 goto free_memory; 1385 1386 acpi_thermal_guess_offset(tz); 1387 1388 result = acpi_thermal_register_thermal_zone(tz); 1389 if (result) 1390 goto free_memory; 1391 1392 result = acpi_thermal_add_fs(device); 1393 if (result) 1394 goto unregister_thermal_zone; 1395 1396 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", 1397 acpi_device_name(device), acpi_device_bid(device), 1398 KELVIN_TO_CELSIUS(tz->temperature)); 1399 goto end; 1400 1401 unregister_thermal_zone: 1402 thermal_zone_device_unregister(tz->thermal_zone); 1403 free_memory: 1404 kfree(tz); 1405 end: 1406 return result; 1407 } 1408 1409 static int acpi_thermal_remove(struct acpi_device *device, int type) 1410 { 1411 struct acpi_thermal *tz = NULL; 1412 1413 if (!device || !acpi_driver_data(device)) 1414 return -EINVAL; 1415 1416 tz = acpi_driver_data(device); 1417 1418 acpi_thermal_remove_fs(device); 1419 acpi_thermal_unregister_thermal_zone(tz); 1420 mutex_destroy(&tz->lock); 1421 kfree(tz); 1422 return 0; 1423 } 1424 1425 static int acpi_thermal_resume(struct acpi_device *device) 1426 { 1427 struct acpi_thermal *tz = NULL; 1428 int i, j, power_state, result; 1429 1430 1431 if (!device || !acpi_driver_data(device)) 1432 return -EINVAL; 1433 1434 tz = acpi_driver_data(device); 1435 1436 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { 1437 if (!(&tz->trips.active[i])) 1438 break; 1439 if (!tz->trips.active[i].flags.valid) 1440 break; 1441 tz->trips.active[i].flags.enabled = 1; 1442 for (j = 0; j < tz->trips.active[i].devices.count; j++) { 1443 result = acpi_bus_get_power(tz->trips.active[i].devices. 1444 handles[j], &power_state); 1445 if (result || (power_state != ACPI_STATE_D0)) { 1446 tz->trips.active[i].flags.enabled = 0; 1447 break; 1448 } 1449 } 1450 tz->state.active |= tz->trips.active[i].flags.enabled; 1451 } 1452 1453 acpi_thermal_check(tz); 1454 1455 return AE_OK; 1456 } 1457 1458 static int thermal_act(const struct dmi_system_id *d) { 1459 1460 if (act == 0) { 1461 printk(KERN_NOTICE "ACPI: %s detected: " 1462 "disabling all active thermal trip points\n", d->ident); 1463 act = -1; 1464 } 1465 return 0; 1466 } 1467 static int thermal_nocrt(const struct dmi_system_id *d) { 1468 1469 printk(KERN_NOTICE "ACPI: %s detected: " 1470 "disabling all critical thermal trip point actions.\n", d->ident); 1471 nocrt = 1; 1472 return 0; 1473 } 1474 static int thermal_tzp(const struct dmi_system_id *d) { 1475 1476 if (tzp == 0) { 1477 printk(KERN_NOTICE "ACPI: %s detected: " 1478 "enabling thermal zone polling\n", d->ident); 1479 tzp = 300; /* 300 dS = 30 Seconds */ 1480 } 1481 return 0; 1482 } 1483 static int thermal_psv(const struct dmi_system_id *d) { 1484 1485 if (psv == 0) { 1486 printk(KERN_NOTICE "ACPI: %s detected: " 1487 "disabling all passive thermal trip points\n", d->ident); 1488 psv = -1; 1489 } 1490 return 0; 1491 } 1492 1493 static struct dmi_system_id thermal_dmi_table[] __initdata = { 1494 /* 1495 * Award BIOS on this AOpen makes thermal control almost worthless. 1496 * http://bugzilla.kernel.org/show_bug.cgi?id=8842 1497 */ 1498 { 1499 .callback = thermal_act, 1500 .ident = "AOpen i915GMm-HFS", 1501 .matches = { 1502 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1503 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1504 }, 1505 }, 1506 { 1507 .callback = thermal_psv, 1508 .ident = "AOpen i915GMm-HFS", 1509 .matches = { 1510 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1511 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1512 }, 1513 }, 1514 { 1515 .callback = thermal_tzp, 1516 .ident = "AOpen i915GMm-HFS", 1517 .matches = { 1518 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), 1519 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), 1520 }, 1521 }, 1522 { 1523 .callback = thermal_nocrt, 1524 .ident = "Gigabyte GA-7ZX", 1525 .matches = { 1526 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), 1527 DMI_MATCH(DMI_BOARD_NAME, "7ZX"), 1528 }, 1529 }, 1530 {} 1531 }; 1532 1533 static int __init acpi_thermal_init(void) 1534 { 1535 int result = 0; 1536 1537 dmi_check_system(thermal_dmi_table); 1538 1539 if (off) { 1540 printk(KERN_NOTICE "ACPI: thermal control disabled\n"); 1541 return -ENODEV; 1542 } 1543 acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); 1544 if (!acpi_thermal_dir) 1545 return -ENODEV; 1546 1547 result = acpi_bus_register_driver(&acpi_thermal_driver); 1548 if (result < 0) { 1549 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1550 return -ENODEV; 1551 } 1552 1553 return 0; 1554 } 1555 1556 static void __exit acpi_thermal_exit(void) 1557 { 1558 1559 acpi_bus_unregister_driver(&acpi_thermal_driver); 1560 1561 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); 1562 1563 return; 1564 } 1565 1566 module_init(acpi_thermal_init); 1567 module_exit(acpi_thermal_exit); 1568