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34#include <linux/kernel.h>
35#include <linux/module.h>
36#include <linux/dmi.h>
37#include <linux/init.h>
38#include <linux/slab.h>
39#include <linux/types.h>
40#include <linux/jiffies.h>
41#include <linux/kmod.h>
42#include <linux/reboot.h>
43#include <linux/device.h>
44#include <asm/uaccess.h>
45#include <linux/thermal.h>
46#include <acpi/acpi_bus.h>
47#include <acpi/acpi_drivers.h>
48
49#define PREFIX "ACPI: "
50
51#define ACPI_THERMAL_CLASS "thermal_zone"
52#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
53#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
54#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
55#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
56#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
57#define ACPI_THERMAL_NOTIFY_HOT 0xF1
58#define ACPI_THERMAL_MODE_ACTIVE 0x00
59
60#define ACPI_THERMAL_MAX_ACTIVE 10
61#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
62
63#define _COMPONENT ACPI_THERMAL_COMPONENT
64ACPI_MODULE_NAME("thermal");
65
66MODULE_AUTHOR("Paul Diefenbaugh");
67MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
68MODULE_LICENSE("GPL");
69
70static int act;
71module_param(act, int, 0644);
72MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
73
74static int crt;
75module_param(crt, int, 0644);
76MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
77
78static int tzp;
79module_param(tzp, int, 0444);
80MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
81
82static int nocrt;
83module_param(nocrt, int, 0);
84MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
85
86static int off;
87module_param(off, int, 0);
88MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
89
90static int psv;
91module_param(psv, int, 0644);
92MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
93
94static int acpi_thermal_add(struct acpi_device *device);
95static int acpi_thermal_remove(struct acpi_device *device);
96static void acpi_thermal_notify(struct acpi_device *device, u32 event);
97
98static const struct acpi_device_id thermal_device_ids[] = {
99 {ACPI_THERMAL_HID, 0},
100 {"", 0},
101};
102MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
103
104#ifdef CONFIG_PM_SLEEP
105static int acpi_thermal_resume(struct device *dev);
106#endif
107static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume);
108
109static struct acpi_driver acpi_thermal_driver = {
110 .name = "thermal",
111 .class = ACPI_THERMAL_CLASS,
112 .ids = thermal_device_ids,
113 .ops = {
114 .add = acpi_thermal_add,
115 .remove = acpi_thermal_remove,
116 .notify = acpi_thermal_notify,
117 },
118 .drv.pm = &acpi_thermal_pm,
119};
120
121struct acpi_thermal_state {
122 u8 critical:1;
123 u8 hot:1;
124 u8 passive:1;
125 u8 active:1;
126 u8 reserved:4;
127 int active_index;
128};
129
130struct acpi_thermal_state_flags {
131 u8 valid:1;
132 u8 enabled:1;
133 u8 reserved:6;
134};
135
136struct acpi_thermal_critical {
137 struct acpi_thermal_state_flags flags;
138 unsigned long temperature;
139};
140
141struct acpi_thermal_hot {
142 struct acpi_thermal_state_flags flags;
143 unsigned long temperature;
144};
145
146struct acpi_thermal_passive {
147 struct acpi_thermal_state_flags flags;
148 unsigned long temperature;
149 unsigned long tc1;
150 unsigned long tc2;
151 unsigned long tsp;
152 struct acpi_handle_list devices;
153};
154
155struct acpi_thermal_active {
156 struct acpi_thermal_state_flags flags;
157 unsigned long temperature;
158 struct acpi_handle_list devices;
159};
160
161struct acpi_thermal_trips {
162 struct acpi_thermal_critical critical;
163 struct acpi_thermal_hot hot;
164 struct acpi_thermal_passive passive;
165 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
166};
167
168struct acpi_thermal_flags {
169 u8 cooling_mode:1;
170 u8 devices:1;
171 u8 reserved:6;
172};
173
174struct acpi_thermal {
175 struct acpi_device * device;
176 acpi_bus_id name;
177 unsigned long temperature;
178 unsigned long last_temperature;
179 unsigned long polling_frequency;
180 volatile u8 zombie;
181 struct acpi_thermal_flags flags;
182 struct acpi_thermal_state state;
183 struct acpi_thermal_trips trips;
184 struct acpi_handle_list devices;
185 struct thermal_zone_device *thermal_zone;
186 int tz_enabled;
187 int kelvin_offset;
188};
189
190
191
192
193
194static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
195{
196 acpi_status status = AE_OK;
197 unsigned long long tmp;
198
199 if (!tz)
200 return -EINVAL;
201
202 tz->last_temperature = tz->temperature;
203
204 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
205 if (ACPI_FAILURE(status))
206 return -ENODEV;
207
208 tz->temperature = tmp;
209 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
210 tz->temperature));
211
212 return 0;
213}
214
215static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
216{
217 acpi_status status = AE_OK;
218 unsigned long long tmp;
219
220 if (!tz)
221 return -EINVAL;
222
223 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
224 if (ACPI_FAILURE(status))
225 return -ENODEV;
226
227 tz->polling_frequency = tmp;
228 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
229 tz->polling_frequency));
230
231 return 0;
232}
233
234static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
235{
236 if (!tz)
237 return -EINVAL;
238
239 if (!acpi_has_method(tz->device->handle, "_SCP")) {
240 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
241 return -ENODEV;
242 } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle,
243 "_SCP", mode))) {
244 return -ENODEV;
245 }
246
247 return 0;
248}
249
250#define ACPI_TRIPS_CRITICAL 0x01
251#define ACPI_TRIPS_HOT 0x02
252#define ACPI_TRIPS_PASSIVE 0x04
253#define ACPI_TRIPS_ACTIVE 0x08
254#define ACPI_TRIPS_DEVICES 0x10
255
256#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
257#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
258
259#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
260 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
261 ACPI_TRIPS_DEVICES)
262
263
264
265
266
267
268
269
270#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
271do { \
272 if (flags != ACPI_TRIPS_INIT) \
273 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
274 "ACPI thermal trip point %s changed\n" \
275 "Please send acpidump to linux-acpi@vger.kernel.org", str)); \
276} while (0)
277
278static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
279{
280 acpi_status status = AE_OK;
281 unsigned long long tmp;
282 struct acpi_handle_list devices;
283 int valid = 0;
284 int i;
285
286
287 if (flag & ACPI_TRIPS_CRITICAL) {
288 status = acpi_evaluate_integer(tz->device->handle,
289 "_CRT", NULL, &tmp);
290 tz->trips.critical.temperature = tmp;
291
292
293
294
295
296
297 if (ACPI_FAILURE(status)) {
298 tz->trips.critical.flags.valid = 0;
299 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
300 "No critical threshold\n"));
301 } else if (tmp <= 2732) {
302 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
303 "(%llu)\n", tmp);
304 tz->trips.critical.flags.valid = 0;
305 } else {
306 tz->trips.critical.flags.valid = 1;
307 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
308 "Found critical threshold [%lu]\n",
309 tz->trips.critical.temperature));
310 }
311 if (tz->trips.critical.flags.valid == 1) {
312 if (crt == -1) {
313 tz->trips.critical.flags.valid = 0;
314 } else if (crt > 0) {
315 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
316
317
318
319 if (crt_k > tz->trips.critical.temperature)
320 printk(KERN_WARNING PREFIX
321 "Critical threshold %d C\n", crt);
322 tz->trips.critical.temperature = crt_k;
323 }
324 }
325 }
326
327
328 if (flag & ACPI_TRIPS_HOT) {
329 status = acpi_evaluate_integer(tz->device->handle,
330 "_HOT", NULL, &tmp);
331 if (ACPI_FAILURE(status)) {
332 tz->trips.hot.flags.valid = 0;
333 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
334 "No hot threshold\n"));
335 } else {
336 tz->trips.hot.temperature = tmp;
337 tz->trips.hot.flags.valid = 1;
338 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
339 "Found hot threshold [%lu]\n",
340 tz->trips.critical.temperature));
341 }
342 }
343
344
345 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
346 (flag == ACPI_TRIPS_INIT)) {
347 valid = tz->trips.passive.flags.valid;
348 if (psv == -1) {
349 status = AE_SUPPORT;
350 } else if (psv > 0) {
351 tmp = CELSIUS_TO_KELVIN(psv);
352 status = AE_OK;
353 } else {
354 status = acpi_evaluate_integer(tz->device->handle,
355 "_PSV", NULL, &tmp);
356 }
357
358 if (ACPI_FAILURE(status))
359 tz->trips.passive.flags.valid = 0;
360 else {
361 tz->trips.passive.temperature = tmp;
362 tz->trips.passive.flags.valid = 1;
363 if (flag == ACPI_TRIPS_INIT) {
364 status = acpi_evaluate_integer(
365 tz->device->handle, "_TC1",
366 NULL, &tmp);
367 if (ACPI_FAILURE(status))
368 tz->trips.passive.flags.valid = 0;
369 else
370 tz->trips.passive.tc1 = tmp;
371 status = acpi_evaluate_integer(
372 tz->device->handle, "_TC2",
373 NULL, &tmp);
374 if (ACPI_FAILURE(status))
375 tz->trips.passive.flags.valid = 0;
376 else
377 tz->trips.passive.tc2 = tmp;
378 status = acpi_evaluate_integer(
379 tz->device->handle, "_TSP",
380 NULL, &tmp);
381 if (ACPI_FAILURE(status))
382 tz->trips.passive.flags.valid = 0;
383 else
384 tz->trips.passive.tsp = tmp;
385 }
386 }
387 }
388 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
389 memset(&devices, 0, sizeof(struct acpi_handle_list));
390 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
391 NULL, &devices);
392 if (ACPI_FAILURE(status)) {
393 printk(KERN_WARNING PREFIX
394 "Invalid passive threshold\n");
395 tz->trips.passive.flags.valid = 0;
396 }
397 else
398 tz->trips.passive.flags.valid = 1;
399
400 if (memcmp(&tz->trips.passive.devices, &devices,
401 sizeof(struct acpi_handle_list))) {
402 memcpy(&tz->trips.passive.devices, &devices,
403 sizeof(struct acpi_handle_list));
404 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
405 }
406 }
407 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
408 if (valid != tz->trips.passive.flags.valid)
409 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
410 }
411
412
413 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
414 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
415 valid = tz->trips.active[i].flags.valid;
416
417 if (act == -1)
418 break;
419
420 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
421 tz->trips.active[i].flags.valid)) {
422 status = acpi_evaluate_integer(tz->device->handle,
423 name, NULL, &tmp);
424 if (ACPI_FAILURE(status)) {
425 tz->trips.active[i].flags.valid = 0;
426 if (i == 0)
427 break;
428 if (act <= 0)
429 break;
430 if (i == 1)
431 tz->trips.active[0].temperature =
432 CELSIUS_TO_KELVIN(act);
433 else
434
435
436
437
438 tz->trips.active[i - 1].temperature =
439 (tz->trips.active[i - 2].temperature <
440 CELSIUS_TO_KELVIN(act) ?
441 tz->trips.active[i - 2].temperature :
442 CELSIUS_TO_KELVIN(act));
443 break;
444 } else {
445 tz->trips.active[i].temperature = tmp;
446 tz->trips.active[i].flags.valid = 1;
447 }
448 }
449
450 name[2] = 'L';
451 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
452 memset(&devices, 0, sizeof(struct acpi_handle_list));
453 status = acpi_evaluate_reference(tz->device->handle,
454 name, NULL, &devices);
455 if (ACPI_FAILURE(status)) {
456 printk(KERN_WARNING PREFIX
457 "Invalid active%d threshold\n", i);
458 tz->trips.active[i].flags.valid = 0;
459 }
460 else
461 tz->trips.active[i].flags.valid = 1;
462
463 if (memcmp(&tz->trips.active[i].devices, &devices,
464 sizeof(struct acpi_handle_list))) {
465 memcpy(&tz->trips.active[i].devices, &devices,
466 sizeof(struct acpi_handle_list));
467 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
468 }
469 }
470 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
471 if (valid != tz->trips.active[i].flags.valid)
472 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
473
474 if (!tz->trips.active[i].flags.valid)
475 break;
476 }
477
478 if ((flag & ACPI_TRIPS_DEVICES)
479 && acpi_has_method(tz->device->handle, "_TZD")) {
480 memset(&devices, 0, sizeof(devices));
481 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
482 NULL, &devices);
483 if (ACPI_SUCCESS(status)
484 && memcmp(&tz->devices, &devices, sizeof(devices))) {
485 tz->devices = devices;
486 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
487 }
488 }
489
490 return 0;
491}
492
493static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
494{
495 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
496
497 if (ret)
498 return ret;
499
500 valid = tz->trips.critical.flags.valid |
501 tz->trips.hot.flags.valid |
502 tz->trips.passive.flags.valid;
503
504 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
505 valid |= tz->trips.active[i].flags.valid;
506
507 if (!valid) {
508 printk(KERN_WARNING FW_BUG "No valid trip found\n");
509 return -ENODEV;
510 }
511 return 0;
512}
513
514static void acpi_thermal_check(void *data)
515{
516 struct acpi_thermal *tz = data;
517
518 if (!tz->tz_enabled) {
519 pr_warn("thermal zone is disabled \n");
520 return;
521 }
522 thermal_zone_device_update(tz->thermal_zone);
523}
524
525
526#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
527
528static int thermal_get_temp(struct thermal_zone_device *thermal,
529 unsigned long *temp)
530{
531 struct acpi_thermal *tz = thermal->devdata;
532 int result;
533
534 if (!tz)
535 return -EINVAL;
536
537 result = acpi_thermal_get_temperature(tz);
538 if (result)
539 return result;
540
541 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
542 return 0;
543}
544
545static int thermal_get_mode(struct thermal_zone_device *thermal,
546 enum thermal_device_mode *mode)
547{
548 struct acpi_thermal *tz = thermal->devdata;
549
550 if (!tz)
551 return -EINVAL;
552
553 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
554 THERMAL_DEVICE_DISABLED;
555
556 return 0;
557}
558
559static int thermal_set_mode(struct thermal_zone_device *thermal,
560 enum thermal_device_mode mode)
561{
562 struct acpi_thermal *tz = thermal->devdata;
563 int enable;
564
565 if (!tz)
566 return -EINVAL;
567
568
569
570
571 if (mode == THERMAL_DEVICE_ENABLED)
572 enable = 1;
573 else if (mode == THERMAL_DEVICE_DISABLED)
574 enable = 0;
575 else
576 return -EINVAL;
577
578 if (enable != tz->tz_enabled) {
579 tz->tz_enabled = enable;
580 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
581 "%s kernel ACPI thermal control\n",
582 tz->tz_enabled ? "Enable" : "Disable"));
583 acpi_thermal_check(tz);
584 }
585 return 0;
586}
587
588static int thermal_get_trip_type(struct thermal_zone_device *thermal,
589 int trip, enum thermal_trip_type *type)
590{
591 struct acpi_thermal *tz = thermal->devdata;
592 int i;
593
594 if (!tz || trip < 0)
595 return -EINVAL;
596
597 if (tz->trips.critical.flags.valid) {
598 if (!trip) {
599 *type = THERMAL_TRIP_CRITICAL;
600 return 0;
601 }
602 trip--;
603 }
604
605 if (tz->trips.hot.flags.valid) {
606 if (!trip) {
607 *type = THERMAL_TRIP_HOT;
608 return 0;
609 }
610 trip--;
611 }
612
613 if (tz->trips.passive.flags.valid) {
614 if (!trip) {
615 *type = THERMAL_TRIP_PASSIVE;
616 return 0;
617 }
618 trip--;
619 }
620
621 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
622 tz->trips.active[i].flags.valid; i++) {
623 if (!trip) {
624 *type = THERMAL_TRIP_ACTIVE;
625 return 0;
626 }
627 trip--;
628 }
629
630 return -EINVAL;
631}
632
633static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
634 int trip, unsigned long *temp)
635{
636 struct acpi_thermal *tz = thermal->devdata;
637 int i;
638
639 if (!tz || trip < 0)
640 return -EINVAL;
641
642 if (tz->trips.critical.flags.valid) {
643 if (!trip) {
644 *temp = KELVIN_TO_MILLICELSIUS(
645 tz->trips.critical.temperature,
646 tz->kelvin_offset);
647 return 0;
648 }
649 trip--;
650 }
651
652 if (tz->trips.hot.flags.valid) {
653 if (!trip) {
654 *temp = KELVIN_TO_MILLICELSIUS(
655 tz->trips.hot.temperature,
656 tz->kelvin_offset);
657 return 0;
658 }
659 trip--;
660 }
661
662 if (tz->trips.passive.flags.valid) {
663 if (!trip) {
664 *temp = KELVIN_TO_MILLICELSIUS(
665 tz->trips.passive.temperature,
666 tz->kelvin_offset);
667 return 0;
668 }
669 trip--;
670 }
671
672 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
673 tz->trips.active[i].flags.valid; i++) {
674 if (!trip) {
675 *temp = KELVIN_TO_MILLICELSIUS(
676 tz->trips.active[i].temperature,
677 tz->kelvin_offset);
678 return 0;
679 }
680 trip--;
681 }
682
683 return -EINVAL;
684}
685
686static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
687 unsigned long *temperature) {
688 struct acpi_thermal *tz = thermal->devdata;
689
690 if (tz->trips.critical.flags.valid) {
691 *temperature = KELVIN_TO_MILLICELSIUS(
692 tz->trips.critical.temperature,
693 tz->kelvin_offset);
694 return 0;
695 } else
696 return -EINVAL;
697}
698
699static int thermal_get_trend(struct thermal_zone_device *thermal,
700 int trip, enum thermal_trend *trend)
701{
702 struct acpi_thermal *tz = thermal->devdata;
703 enum thermal_trip_type type;
704 int i;
705
706 if (thermal_get_trip_type(thermal, trip, &type))
707 return -EINVAL;
708
709 if (type == THERMAL_TRIP_ACTIVE) {
710 unsigned long trip_temp;
711 unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature,
712 tz->kelvin_offset);
713 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
714 return -EINVAL;
715
716 if (temp > trip_temp) {
717 *trend = THERMAL_TREND_RAISING;
718 return 0;
719 } else {
720
721 return -EINVAL;
722 }
723 }
724
725
726
727
728
729 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
730 + (tz->trips.passive.tc2
731 * (tz->temperature - tz->trips.passive.temperature));
732
733 if (i > 0)
734 *trend = THERMAL_TREND_RAISING;
735 else if (i < 0)
736 *trend = THERMAL_TREND_DROPPING;
737 else
738 *trend = THERMAL_TREND_STABLE;
739 return 0;
740}
741
742
743static int thermal_notify(struct thermal_zone_device *thermal, int trip,
744 enum thermal_trip_type trip_type)
745{
746 u8 type = 0;
747 struct acpi_thermal *tz = thermal->devdata;
748
749 if (trip_type == THERMAL_TRIP_CRITICAL)
750 type = ACPI_THERMAL_NOTIFY_CRITICAL;
751 else if (trip_type == THERMAL_TRIP_HOT)
752 type = ACPI_THERMAL_NOTIFY_HOT;
753 else
754 return 0;
755
756 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
757 dev_name(&tz->device->dev), type, 1);
758
759 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
760 return 1;
761
762 return 0;
763}
764
765static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
766 struct thermal_cooling_device *cdev,
767 bool bind)
768{
769 struct acpi_device *device = cdev->devdata;
770 struct acpi_thermal *tz = thermal->devdata;
771 struct acpi_device *dev;
772 acpi_status status;
773 acpi_handle handle;
774 int i;
775 int j;
776 int trip = -1;
777 int result = 0;
778
779 if (tz->trips.critical.flags.valid)
780 trip++;
781
782 if (tz->trips.hot.flags.valid)
783 trip++;
784
785 if (tz->trips.passive.flags.valid) {
786 trip++;
787 for (i = 0; i < tz->trips.passive.devices.count;
788 i++) {
789 handle = tz->trips.passive.devices.handles[i];
790 status = acpi_bus_get_device(handle, &dev);
791 if (ACPI_FAILURE(status) || dev != device)
792 continue;
793 if (bind)
794 result =
795 thermal_zone_bind_cooling_device
796 (thermal, trip, cdev,
797 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
798 else
799 result =
800 thermal_zone_unbind_cooling_device
801 (thermal, trip, cdev);
802 if (result)
803 goto failed;
804 }
805 }
806
807 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
808 if (!tz->trips.active[i].flags.valid)
809 break;
810 trip++;
811 for (j = 0;
812 j < tz->trips.active[i].devices.count;
813 j++) {
814 handle = tz->trips.active[i].devices.handles[j];
815 status = acpi_bus_get_device(handle, &dev);
816 if (ACPI_FAILURE(status) || dev != device)
817 continue;
818 if (bind)
819 result = thermal_zone_bind_cooling_device
820 (thermal, trip, cdev,
821 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
822 else
823 result = thermal_zone_unbind_cooling_device
824 (thermal, trip, cdev);
825 if (result)
826 goto failed;
827 }
828 }
829
830 for (i = 0; i < tz->devices.count; i++) {
831 handle = tz->devices.handles[i];
832 status = acpi_bus_get_device(handle, &dev);
833 if (ACPI_SUCCESS(status) && (dev == device)) {
834 if (bind)
835 result = thermal_zone_bind_cooling_device
836 (thermal, THERMAL_TRIPS_NONE,
837 cdev, THERMAL_NO_LIMIT,
838 THERMAL_NO_LIMIT);
839 else
840 result = thermal_zone_unbind_cooling_device
841 (thermal, THERMAL_TRIPS_NONE,
842 cdev);
843 if (result)
844 goto failed;
845 }
846 }
847
848failed:
849 return result;
850}
851
852static int
853acpi_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, true);
857}
858
859static int
860acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
861 struct thermal_cooling_device *cdev)
862{
863 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
864}
865
866static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
867 .bind = acpi_thermal_bind_cooling_device,
868 .unbind = acpi_thermal_unbind_cooling_device,
869 .get_temp = thermal_get_temp,
870 .get_mode = thermal_get_mode,
871 .set_mode = thermal_set_mode,
872 .get_trip_type = thermal_get_trip_type,
873 .get_trip_temp = thermal_get_trip_temp,
874 .get_crit_temp = thermal_get_crit_temp,
875 .get_trend = thermal_get_trend,
876 .notify = thermal_notify,
877};
878
879static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
880{
881 int trips = 0;
882 int result;
883 acpi_status status;
884 int i;
885
886 if (tz->trips.critical.flags.valid)
887 trips++;
888
889 if (tz->trips.hot.flags.valid)
890 trips++;
891
892 if (tz->trips.passive.flags.valid)
893 trips++;
894
895 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
896 tz->trips.active[i].flags.valid; i++, trips++);
897
898 if (tz->trips.passive.flags.valid)
899 tz->thermal_zone =
900 thermal_zone_device_register("acpitz", trips, 0, tz,
901 &acpi_thermal_zone_ops, NULL,
902 tz->trips.passive.tsp*100,
903 tz->polling_frequency*100);
904 else
905 tz->thermal_zone =
906 thermal_zone_device_register("acpitz", trips, 0, tz,
907 &acpi_thermal_zone_ops, NULL,
908 0, tz->polling_frequency*100);
909 if (IS_ERR(tz->thermal_zone))
910 return -ENODEV;
911
912 result = sysfs_create_link(&tz->device->dev.kobj,
913 &tz->thermal_zone->device.kobj, "thermal_zone");
914 if (result)
915 return result;
916
917 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
918 &tz->device->dev.kobj, "device");
919 if (result)
920 return result;
921
922 status = acpi_attach_data(tz->device->handle,
923 acpi_bus_private_data_handler,
924 tz->thermal_zone);
925 if (ACPI_FAILURE(status)) {
926 printk(KERN_ERR PREFIX
927 "Error attaching device data\n");
928 return -ENODEV;
929 }
930
931 tz->tz_enabled = 1;
932
933 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
934 tz->thermal_zone->id);
935 return 0;
936}
937
938static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
939{
940 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
941 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
942 thermal_zone_device_unregister(tz->thermal_zone);
943 tz->thermal_zone = NULL;
944 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
945}
946
947
948
949
950
951
952static void acpi_thermal_notify(struct acpi_device *device, u32 event)
953{
954 struct acpi_thermal *tz = acpi_driver_data(device);
955
956
957 if (!tz)
958 return;
959
960 switch (event) {
961 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
962 acpi_thermal_check(tz);
963 break;
964 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
965 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
966 acpi_thermal_check(tz);
967 acpi_bus_generate_netlink_event(device->pnp.device_class,
968 dev_name(&device->dev), event, 0);
969 break;
970 case ACPI_THERMAL_NOTIFY_DEVICES:
971 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
972 acpi_thermal_check(tz);
973 acpi_bus_generate_netlink_event(device->pnp.device_class,
974 dev_name(&device->dev), event, 0);
975 break;
976 default:
977 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
978 "Unsupported event [0x%x]\n", event));
979 break;
980 }
981}
982
983
984
985
986
987
988
989
990
991
992
993
994
995static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
996{
997 acpi_handle handle = tz->device->handle;
998 unsigned long long value;
999 int i;
1000
1001 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1002 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1003 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1004 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1005 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1006 acpi_status status;
1007
1008 status = acpi_evaluate_integer(handle, name, NULL, &value);
1009 if (status == AE_NOT_FOUND)
1010 break;
1011 }
1012 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1013}
1014
1015static int acpi_thermal_get_info(struct acpi_thermal *tz)
1016{
1017 int result = 0;
1018
1019
1020 if (!tz)
1021 return -EINVAL;
1022
1023 acpi_thermal_aml_dependency_fix(tz);
1024
1025
1026 result = acpi_thermal_get_trip_points(tz);
1027 if (result)
1028 return result;
1029
1030
1031 result = acpi_thermal_get_temperature(tz);
1032 if (result)
1033 return result;
1034
1035
1036 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1037 if (!result)
1038 tz->flags.cooling_mode = 1;
1039
1040
1041 if (tzp)
1042 tz->polling_frequency = tzp;
1043 else
1044 acpi_thermal_get_polling_frequency(tz);
1045
1046 return 0;
1047}
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1060{
1061 if (tz->trips.critical.flags.valid &&
1062 (tz->trips.critical.temperature % 5) == 1)
1063 tz->kelvin_offset = 2731;
1064 else
1065 tz->kelvin_offset = 2732;
1066}
1067
1068static int acpi_thermal_add(struct acpi_device *device)
1069{
1070 int result = 0;
1071 struct acpi_thermal *tz = NULL;
1072
1073
1074 if (!device)
1075 return -EINVAL;
1076
1077 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1078 if (!tz)
1079 return -ENOMEM;
1080
1081 tz->device = device;
1082 strcpy(tz->name, device->pnp.bus_id);
1083 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1084 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1085 device->driver_data = tz;
1086
1087 result = acpi_thermal_get_info(tz);
1088 if (result)
1089 goto free_memory;
1090
1091 acpi_thermal_guess_offset(tz);
1092
1093 result = acpi_thermal_register_thermal_zone(tz);
1094 if (result)
1095 goto free_memory;
1096
1097 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1098 acpi_device_name(device), acpi_device_bid(device),
1099 KELVIN_TO_CELSIUS(tz->temperature));
1100 goto end;
1101
1102free_memory:
1103 kfree(tz);
1104end:
1105 return result;
1106}
1107
1108static int acpi_thermal_remove(struct acpi_device *device)
1109{
1110 struct acpi_thermal *tz = NULL;
1111
1112 if (!device || !acpi_driver_data(device))
1113 return -EINVAL;
1114
1115 tz = acpi_driver_data(device);
1116
1117 acpi_thermal_unregister_thermal_zone(tz);
1118 kfree(tz);
1119 return 0;
1120}
1121
1122#ifdef CONFIG_PM_SLEEP
1123static int acpi_thermal_resume(struct device *dev)
1124{
1125 struct acpi_thermal *tz;
1126 int i, j, power_state, result;
1127
1128 if (!dev)
1129 return -EINVAL;
1130
1131 tz = acpi_driver_data(to_acpi_device(dev));
1132 if (!tz)
1133 return -EINVAL;
1134
1135 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1136 if (!(&tz->trips.active[i]))
1137 break;
1138 if (!tz->trips.active[i].flags.valid)
1139 break;
1140 tz->trips.active[i].flags.enabled = 1;
1141 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1142 result = acpi_bus_update_power(
1143 tz->trips.active[i].devices.handles[j],
1144 &power_state);
1145 if (result || (power_state != ACPI_STATE_D0)) {
1146 tz->trips.active[i].flags.enabled = 0;
1147 break;
1148 }
1149 }
1150 tz->state.active |= tz->trips.active[i].flags.enabled;
1151 }
1152
1153 acpi_thermal_check(tz);
1154
1155 return AE_OK;
1156}
1157#endif
1158
1159static int thermal_act(const struct dmi_system_id *d) {
1160
1161 if (act == 0) {
1162 printk(KERN_NOTICE "ACPI: %s detected: "
1163 "disabling all active thermal trip points\n", d->ident);
1164 act = -1;
1165 }
1166 return 0;
1167}
1168static int thermal_nocrt(const struct dmi_system_id *d) {
1169
1170 printk(KERN_NOTICE "ACPI: %s detected: "
1171 "disabling all critical thermal trip point actions.\n", d->ident);
1172 nocrt = 1;
1173 return 0;
1174}
1175static int thermal_tzp(const struct dmi_system_id *d) {
1176
1177 if (tzp == 0) {
1178 printk(KERN_NOTICE "ACPI: %s detected: "
1179 "enabling thermal zone polling\n", d->ident);
1180 tzp = 300;
1181 }
1182 return 0;
1183}
1184static int thermal_psv(const struct dmi_system_id *d) {
1185
1186 if (psv == 0) {
1187 printk(KERN_NOTICE "ACPI: %s detected: "
1188 "disabling all passive thermal trip points\n", d->ident);
1189 psv = -1;
1190 }
1191 return 0;
1192}
1193
1194static struct dmi_system_id thermal_dmi_table[] __initdata = {
1195
1196
1197
1198
1199 {
1200 .callback = thermal_act,
1201 .ident = "AOpen i915GMm-HFS",
1202 .matches = {
1203 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1204 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1205 },
1206 },
1207 {
1208 .callback = thermal_psv,
1209 .ident = "AOpen i915GMm-HFS",
1210 .matches = {
1211 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1212 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1213 },
1214 },
1215 {
1216 .callback = thermal_tzp,
1217 .ident = "AOpen i915GMm-HFS",
1218 .matches = {
1219 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1220 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1221 },
1222 },
1223 {
1224 .callback = thermal_nocrt,
1225 .ident = "Gigabyte GA-7ZX",
1226 .matches = {
1227 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1228 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1229 },
1230 },
1231 {}
1232};
1233
1234static int __init acpi_thermal_init(void)
1235{
1236 int result = 0;
1237
1238 dmi_check_system(thermal_dmi_table);
1239
1240 if (off) {
1241 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1242 return -ENODEV;
1243 }
1244
1245 result = acpi_bus_register_driver(&acpi_thermal_driver);
1246 if (result < 0)
1247 return -ENODEV;
1248
1249 return 0;
1250}
1251
1252static void __exit acpi_thermal_exit(void)
1253{
1254
1255 acpi_bus_unregister_driver(&acpi_thermal_driver);
1256
1257 return;
1258}
1259
1260module_init(acpi_thermal_init);
1261module_exit(acpi_thermal_exit);
1262
