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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 pr_warn(FW_BUG "Invalid critical threshold (%llu)\n",
303 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 pr_warn(PREFIX "Critical threshold %d C\n",
321 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 pr_warn(PREFIX "Invalid passive threshold\n");
394 tz->trips.passive.flags.valid = 0;
395 }
396 else
397 tz->trips.passive.flags.valid = 1;
398
399 if (memcmp(&tz->trips.passive.devices, &devices,
400 sizeof(struct acpi_handle_list))) {
401 memcpy(&tz->trips.passive.devices, &devices,
402 sizeof(struct acpi_handle_list));
403 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
404 }
405 }
406 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
407 if (valid != tz->trips.passive.flags.valid)
408 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
409 }
410
411
412 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
413 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
414 valid = tz->trips.active[i].flags.valid;
415
416 if (act == -1)
417 break;
418
419 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
420 tz->trips.active[i].flags.valid)) {
421 status = acpi_evaluate_integer(tz->device->handle,
422 name, NULL, &tmp);
423 if (ACPI_FAILURE(status)) {
424 tz->trips.active[i].flags.valid = 0;
425 if (i == 0)
426 break;
427 if (act <= 0)
428 break;
429 if (i == 1)
430 tz->trips.active[0].temperature =
431 CELSIUS_TO_KELVIN(act);
432 else
433
434
435
436
437 tz->trips.active[i - 1].temperature =
438 (tz->trips.active[i - 2].temperature <
439 CELSIUS_TO_KELVIN(act) ?
440 tz->trips.active[i - 2].temperature :
441 CELSIUS_TO_KELVIN(act));
442 break;
443 } else {
444 tz->trips.active[i].temperature = tmp;
445 tz->trips.active[i].flags.valid = 1;
446 }
447 }
448
449 name[2] = 'L';
450 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
451 memset(&devices, 0, sizeof(struct acpi_handle_list));
452 status = acpi_evaluate_reference(tz->device->handle,
453 name, NULL, &devices);
454 if (ACPI_FAILURE(status)) {
455 pr_warn(PREFIX "Invalid active%d threshold\n",
456 i);
457 tz->trips.active[i].flags.valid = 0;
458 }
459 else
460 tz->trips.active[i].flags.valid = 1;
461
462 if (memcmp(&tz->trips.active[i].devices, &devices,
463 sizeof(struct acpi_handle_list))) {
464 memcpy(&tz->trips.active[i].devices, &devices,
465 sizeof(struct acpi_handle_list));
466 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
467 }
468 }
469 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
470 if (valid != tz->trips.active[i].flags.valid)
471 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
472
473 if (!tz->trips.active[i].flags.valid)
474 break;
475 }
476
477 if ((flag & ACPI_TRIPS_DEVICES)
478 && acpi_has_method(tz->device->handle, "_TZD")) {
479 memset(&devices, 0, sizeof(devices));
480 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
481 NULL, &devices);
482 if (ACPI_SUCCESS(status)
483 && memcmp(&tz->devices, &devices, sizeof(devices))) {
484 tz->devices = devices;
485 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
486 }
487 }
488
489 return 0;
490}
491
492static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
493{
494 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
495
496 if (ret)
497 return ret;
498
499 valid = tz->trips.critical.flags.valid |
500 tz->trips.hot.flags.valid |
501 tz->trips.passive.flags.valid;
502
503 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
504 valid |= tz->trips.active[i].flags.valid;
505
506 if (!valid) {
507 pr_warn(FW_BUG "No valid trip found\n");
508 return -ENODEV;
509 }
510 return 0;
511}
512
513static void acpi_thermal_check(void *data)
514{
515 struct acpi_thermal *tz = data;
516
517 if (!tz->tz_enabled)
518 return;
519
520 thermal_zone_device_update(tz->thermal_zone);
521}
522
523
524#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
525
526static int thermal_get_temp(struct thermal_zone_device *thermal,
527 unsigned long *temp)
528{
529 struct acpi_thermal *tz = thermal->devdata;
530 int result;
531
532 if (!tz)
533 return -EINVAL;
534
535 result = acpi_thermal_get_temperature(tz);
536 if (result)
537 return result;
538
539 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
540 return 0;
541}
542
543static int thermal_get_mode(struct thermal_zone_device *thermal,
544 enum thermal_device_mode *mode)
545{
546 struct acpi_thermal *tz = thermal->devdata;
547
548 if (!tz)
549 return -EINVAL;
550
551 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
552 THERMAL_DEVICE_DISABLED;
553
554 return 0;
555}
556
557static int thermal_set_mode(struct thermal_zone_device *thermal,
558 enum thermal_device_mode mode)
559{
560 struct acpi_thermal *tz = thermal->devdata;
561 int enable;
562
563 if (!tz)
564 return -EINVAL;
565
566
567
568
569 if (mode == THERMAL_DEVICE_ENABLED)
570 enable = 1;
571 else if (mode == THERMAL_DEVICE_DISABLED) {
572 enable = 0;
573 pr_warn("thermal zone will be disabled\n");
574 } else
575 return -EINVAL;
576
577 if (enable != tz->tz_enabled) {
578 tz->tz_enabled = enable;
579 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
580 "%s kernel ACPI thermal control\n",
581 tz->tz_enabled ? "Enable" : "Disable"));
582 acpi_thermal_check(tz);
583 }
584 return 0;
585}
586
587static int thermal_get_trip_type(struct thermal_zone_device *thermal,
588 int trip, enum thermal_trip_type *type)
589{
590 struct acpi_thermal *tz = thermal->devdata;
591 int i;
592
593 if (!tz || trip < 0)
594 return -EINVAL;
595
596 if (tz->trips.critical.flags.valid) {
597 if (!trip) {
598 *type = THERMAL_TRIP_CRITICAL;
599 return 0;
600 }
601 trip--;
602 }
603
604 if (tz->trips.hot.flags.valid) {
605 if (!trip) {
606 *type = THERMAL_TRIP_HOT;
607 return 0;
608 }
609 trip--;
610 }
611
612 if (tz->trips.passive.flags.valid) {
613 if (!trip) {
614 *type = THERMAL_TRIP_PASSIVE;
615 return 0;
616 }
617 trip--;
618 }
619
620 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
621 tz->trips.active[i].flags.valid; i++) {
622 if (!trip) {
623 *type = THERMAL_TRIP_ACTIVE;
624 return 0;
625 }
626 trip--;
627 }
628
629 return -EINVAL;
630}
631
632static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
633 int trip, unsigned long *temp)
634{
635 struct acpi_thermal *tz = thermal->devdata;
636 int i;
637
638 if (!tz || trip < 0)
639 return -EINVAL;
640
641 if (tz->trips.critical.flags.valid) {
642 if (!trip) {
643 *temp = KELVIN_TO_MILLICELSIUS(
644 tz->trips.critical.temperature,
645 tz->kelvin_offset);
646 return 0;
647 }
648 trip--;
649 }
650
651 if (tz->trips.hot.flags.valid) {
652 if (!trip) {
653 *temp = KELVIN_TO_MILLICELSIUS(
654 tz->trips.hot.temperature,
655 tz->kelvin_offset);
656 return 0;
657 }
658 trip--;
659 }
660
661 if (tz->trips.passive.flags.valid) {
662 if (!trip) {
663 *temp = KELVIN_TO_MILLICELSIUS(
664 tz->trips.passive.temperature,
665 tz->kelvin_offset);
666 return 0;
667 }
668 trip--;
669 }
670
671 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
672 tz->trips.active[i].flags.valid; i++) {
673 if (!trip) {
674 *temp = KELVIN_TO_MILLICELSIUS(
675 tz->trips.active[i].temperature,
676 tz->kelvin_offset);
677 return 0;
678 }
679 trip--;
680 }
681
682 return -EINVAL;
683}
684
685static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
686 unsigned long *temperature) {
687 struct acpi_thermal *tz = thermal->devdata;
688
689 if (tz->trips.critical.flags.valid) {
690 *temperature = KELVIN_TO_MILLICELSIUS(
691 tz->trips.critical.temperature,
692 tz->kelvin_offset);
693 return 0;
694 } else
695 return -EINVAL;
696}
697
698static int thermal_get_trend(struct thermal_zone_device *thermal,
699 int trip, enum thermal_trend *trend)
700{
701 struct acpi_thermal *tz = thermal->devdata;
702 enum thermal_trip_type type;
703 int i;
704
705 if (thermal_get_trip_type(thermal, trip, &type))
706 return -EINVAL;
707
708 if (type == THERMAL_TRIP_ACTIVE) {
709 unsigned long trip_temp;
710 unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature,
711 tz->kelvin_offset);
712 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
713 return -EINVAL;
714
715 if (temp > trip_temp) {
716 *trend = THERMAL_TREND_RAISING;
717 return 0;
718 } else {
719
720 return -EINVAL;
721 }
722 }
723
724
725
726
727
728 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
729 + (tz->trips.passive.tc2
730 * (tz->temperature - tz->trips.passive.temperature));
731
732 if (i > 0)
733 *trend = THERMAL_TREND_RAISING;
734 else if (i < 0)
735 *trend = THERMAL_TREND_DROPPING;
736 else
737 *trend = THERMAL_TREND_STABLE;
738 return 0;
739}
740
741
742static int thermal_notify(struct thermal_zone_device *thermal, int trip,
743 enum thermal_trip_type trip_type)
744{
745 u8 type = 0;
746 struct acpi_thermal *tz = thermal->devdata;
747
748 if (trip_type == THERMAL_TRIP_CRITICAL)
749 type = ACPI_THERMAL_NOTIFY_CRITICAL;
750 else if (trip_type == THERMAL_TRIP_HOT)
751 type = ACPI_THERMAL_NOTIFY_HOT;
752 else
753 return 0;
754
755 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
756 dev_name(&tz->device->dev), type, 1);
757
758 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
759 return 1;
760
761 return 0;
762}
763
764static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
765 struct thermal_cooling_device *cdev,
766 bool bind)
767{
768 struct acpi_device *device = cdev->devdata;
769 struct acpi_thermal *tz = thermal->devdata;
770 struct acpi_device *dev;
771 acpi_status status;
772 acpi_handle handle;
773 int i;
774 int j;
775 int trip = -1;
776 int result = 0;
777
778 if (tz->trips.critical.flags.valid)
779 trip++;
780
781 if (tz->trips.hot.flags.valid)
782 trip++;
783
784 if (tz->trips.passive.flags.valid) {
785 trip++;
786 for (i = 0; i < tz->trips.passive.devices.count;
787 i++) {
788 handle = tz->trips.passive.devices.handles[i];
789 status = acpi_bus_get_device(handle, &dev);
790 if (ACPI_FAILURE(status) || dev != device)
791 continue;
792 if (bind)
793 result =
794 thermal_zone_bind_cooling_device
795 (thermal, trip, cdev,
796 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
797 else
798 result =
799 thermal_zone_unbind_cooling_device
800 (thermal, trip, cdev);
801 if (result)
802 goto failed;
803 }
804 }
805
806 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
807 if (!tz->trips.active[i].flags.valid)
808 break;
809 trip++;
810 for (j = 0;
811 j < tz->trips.active[i].devices.count;
812 j++) {
813 handle = tz->trips.active[i].devices.handles[j];
814 status = acpi_bus_get_device(handle, &dev);
815 if (ACPI_FAILURE(status) || dev != device)
816 continue;
817 if (bind)
818 result = thermal_zone_bind_cooling_device
819 (thermal, trip, cdev,
820 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
821 else
822 result = thermal_zone_unbind_cooling_device
823 (thermal, trip, cdev);
824 if (result)
825 goto failed;
826 }
827 }
828
829 for (i = 0; i < tz->devices.count; i++) {
830 handle = tz->devices.handles[i];
831 status = acpi_bus_get_device(handle, &dev);
832 if (ACPI_SUCCESS(status) && (dev == device)) {
833 if (bind)
834 result = thermal_zone_bind_cooling_device
835 (thermal, THERMAL_TRIPS_NONE,
836 cdev, THERMAL_NO_LIMIT,
837 THERMAL_NO_LIMIT);
838 else
839 result = thermal_zone_unbind_cooling_device
840 (thermal, THERMAL_TRIPS_NONE,
841 cdev);
842 if (result)
843 goto failed;
844 }
845 }
846
847failed:
848 return result;
849}
850
851static int
852acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
853 struct thermal_cooling_device *cdev)
854{
855 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
856}
857
858static int
859acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
860 struct thermal_cooling_device *cdev)
861{
862 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
863}
864
865static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
866 .bind = acpi_thermal_bind_cooling_device,
867 .unbind = acpi_thermal_unbind_cooling_device,
868 .get_temp = thermal_get_temp,
869 .get_mode = thermal_get_mode,
870 .set_mode = thermal_set_mode,
871 .get_trip_type = thermal_get_trip_type,
872 .get_trip_temp = thermal_get_trip_temp,
873 .get_crit_temp = thermal_get_crit_temp,
874 .get_trend = thermal_get_trend,
875 .notify = thermal_notify,
876};
877
878static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
879{
880 int trips = 0;
881 int result;
882 acpi_status status;
883 int i;
884
885 if (tz->trips.critical.flags.valid)
886 trips++;
887
888 if (tz->trips.hot.flags.valid)
889 trips++;
890
891 if (tz->trips.passive.flags.valid)
892 trips++;
893
894 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
895 tz->trips.active[i].flags.valid; i++, trips++);
896
897 if (tz->trips.passive.flags.valid)
898 tz->thermal_zone =
899 thermal_zone_device_register("acpitz", trips, 0, tz,
900 &acpi_thermal_zone_ops, NULL,
901 tz->trips.passive.tsp*100,
902 tz->polling_frequency*100);
903 else
904 tz->thermal_zone =
905 thermal_zone_device_register("acpitz", trips, 0, tz,
906 &acpi_thermal_zone_ops, NULL,
907 0, tz->polling_frequency*100);
908 if (IS_ERR(tz->thermal_zone))
909 return -ENODEV;
910
911 result = sysfs_create_link(&tz->device->dev.kobj,
912 &tz->thermal_zone->device.kobj, "thermal_zone");
913 if (result)
914 return result;
915
916 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
917 &tz->device->dev.kobj, "device");
918 if (result)
919 return result;
920
921 status = acpi_attach_data(tz->device->handle,
922 acpi_bus_private_data_handler,
923 tz->thermal_zone);
924 if (ACPI_FAILURE(status)) {
925 pr_err(PREFIX "Error attaching device data\n");
926 return -ENODEV;
927 }
928
929 tz->tz_enabled = 1;
930
931 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
932 tz->thermal_zone->id);
933 return 0;
934}
935
936static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
937{
938 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
939 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
940 thermal_zone_device_unregister(tz->thermal_zone);
941 tz->thermal_zone = NULL;
942 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
943}
944
945
946
947
948
949
950static void acpi_thermal_notify(struct acpi_device *device, u32 event)
951{
952 struct acpi_thermal *tz = acpi_driver_data(device);
953
954
955 if (!tz)
956 return;
957
958 switch (event) {
959 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
960 acpi_thermal_check(tz);
961 break;
962 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
963 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
964 acpi_thermal_check(tz);
965 acpi_bus_generate_netlink_event(device->pnp.device_class,
966 dev_name(&device->dev), event, 0);
967 break;
968 case ACPI_THERMAL_NOTIFY_DEVICES:
969 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
970 acpi_thermal_check(tz);
971 acpi_bus_generate_netlink_event(device->pnp.device_class,
972 dev_name(&device->dev), event, 0);
973 break;
974 default:
975 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
976 "Unsupported event [0x%x]\n", event));
977 break;
978 }
979}
980
981
982
983
984
985
986
987
988
989
990
991
992
993static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
994{
995 acpi_handle handle = tz->device->handle;
996 unsigned long long value;
997 int i;
998
999 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1000 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1001 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1002 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1003 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1004 acpi_status status;
1005
1006 status = acpi_evaluate_integer(handle, name, NULL, &value);
1007 if (status == AE_NOT_FOUND)
1008 break;
1009 }
1010 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1011}
1012
1013static int acpi_thermal_get_info(struct acpi_thermal *tz)
1014{
1015 int result = 0;
1016
1017
1018 if (!tz)
1019 return -EINVAL;
1020
1021 acpi_thermal_aml_dependency_fix(tz);
1022
1023
1024 result = acpi_thermal_get_trip_points(tz);
1025 if (result)
1026 return result;
1027
1028
1029 result = acpi_thermal_get_temperature(tz);
1030 if (result)
1031 return result;
1032
1033
1034 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1035 if (!result)
1036 tz->flags.cooling_mode = 1;
1037
1038
1039 if (tzp)
1040 tz->polling_frequency = tzp;
1041 else
1042 acpi_thermal_get_polling_frequency(tz);
1043
1044 return 0;
1045}
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1058{
1059 if (tz->trips.critical.flags.valid &&
1060 (tz->trips.critical.temperature % 5) == 1)
1061 tz->kelvin_offset = 2731;
1062 else
1063 tz->kelvin_offset = 2732;
1064}
1065
1066static int acpi_thermal_add(struct acpi_device *device)
1067{
1068 int result = 0;
1069 struct acpi_thermal *tz = NULL;
1070
1071
1072 if (!device)
1073 return -EINVAL;
1074
1075 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1076 if (!tz)
1077 return -ENOMEM;
1078
1079 tz->device = device;
1080 strcpy(tz->name, device->pnp.bus_id);
1081 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1082 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1083 device->driver_data = tz;
1084
1085 result = acpi_thermal_get_info(tz);
1086 if (result)
1087 goto free_memory;
1088
1089 acpi_thermal_guess_offset(tz);
1090
1091 result = acpi_thermal_register_thermal_zone(tz);
1092 if (result)
1093 goto free_memory;
1094
1095 pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device),
1096 acpi_device_bid(device), KELVIN_TO_CELSIUS(tz->temperature));
1097 goto end;
1098
1099free_memory:
1100 kfree(tz);
1101end:
1102 return result;
1103}
1104
1105static int acpi_thermal_remove(struct acpi_device *device)
1106{
1107 struct acpi_thermal *tz = NULL;
1108
1109 if (!device || !acpi_driver_data(device))
1110 return -EINVAL;
1111
1112 tz = acpi_driver_data(device);
1113
1114 acpi_thermal_unregister_thermal_zone(tz);
1115 kfree(tz);
1116 return 0;
1117}
1118
1119#ifdef CONFIG_PM_SLEEP
1120static int acpi_thermal_resume(struct device *dev)
1121{
1122 struct acpi_thermal *tz;
1123 int i, j, power_state, result;
1124
1125 if (!dev)
1126 return -EINVAL;
1127
1128 tz = acpi_driver_data(to_acpi_device(dev));
1129 if (!tz)
1130 return -EINVAL;
1131
1132 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1133 if (!(&tz->trips.active[i]))
1134 break;
1135 if (!tz->trips.active[i].flags.valid)
1136 break;
1137 tz->trips.active[i].flags.enabled = 1;
1138 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1139 result = acpi_bus_update_power(
1140 tz->trips.active[i].devices.handles[j],
1141 &power_state);
1142 if (result || (power_state != ACPI_STATE_D0)) {
1143 tz->trips.active[i].flags.enabled = 0;
1144 break;
1145 }
1146 }
1147 tz->state.active |= tz->trips.active[i].flags.enabled;
1148 }
1149
1150 acpi_thermal_check(tz);
1151
1152 return AE_OK;
1153}
1154#endif
1155
1156static int thermal_act(const struct dmi_system_id *d) {
1157
1158 if (act == 0) {
1159 pr_notice(PREFIX "%s detected: "
1160 "disabling all active thermal trip points\n", d->ident);
1161 act = -1;
1162 }
1163 return 0;
1164}
1165static int thermal_nocrt(const struct dmi_system_id *d) {
1166
1167 pr_notice(PREFIX "%s detected: "
1168 "disabling all critical thermal trip point actions.\n", d->ident);
1169 nocrt = 1;
1170 return 0;
1171}
1172static int thermal_tzp(const struct dmi_system_id *d) {
1173
1174 if (tzp == 0) {
1175 pr_notice(PREFIX "%s detected: "
1176 "enabling thermal zone polling\n", d->ident);
1177 tzp = 300;
1178 }
1179 return 0;
1180}
1181static int thermal_psv(const struct dmi_system_id *d) {
1182
1183 if (psv == 0) {
1184 pr_notice(PREFIX "%s detected: "
1185 "disabling all passive thermal trip points\n", d->ident);
1186 psv = -1;
1187 }
1188 return 0;
1189}
1190
1191static struct dmi_system_id thermal_dmi_table[] __initdata = {
1192
1193
1194
1195
1196 {
1197 .callback = thermal_act,
1198 .ident = "AOpen i915GMm-HFS",
1199 .matches = {
1200 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1201 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1202 },
1203 },
1204 {
1205 .callback = thermal_psv,
1206 .ident = "AOpen i915GMm-HFS",
1207 .matches = {
1208 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1209 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1210 },
1211 },
1212 {
1213 .callback = thermal_tzp,
1214 .ident = "AOpen i915GMm-HFS",
1215 .matches = {
1216 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1217 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1218 },
1219 },
1220 {
1221 .callback = thermal_nocrt,
1222 .ident = "Gigabyte GA-7ZX",
1223 .matches = {
1224 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1225 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1226 },
1227 },
1228 {}
1229};
1230
1231static int __init acpi_thermal_init(void)
1232{
1233 int result = 0;
1234
1235 dmi_check_system(thermal_dmi_table);
1236
1237 if (off) {
1238 pr_notice(PREFIX "thermal control disabled\n");
1239 return -ENODEV;
1240 }
1241
1242 result = acpi_bus_register_driver(&acpi_thermal_driver);
1243 if (result < 0)
1244 return -ENODEV;
1245
1246 return 0;
1247}
1248
1249static void __exit acpi_thermal_exit(void)
1250{
1251
1252 acpi_bus_unregister_driver(&acpi_thermal_driver);
1253
1254 return;
1255}
1256
1257module_init(acpi_thermal_init);
1258module_exit(acpi_thermal_exit);
1259
