1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
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/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_FILE_STATE "state"
54#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
55#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
56#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
57#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
58#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
59#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
60#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
61#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
62#define ACPI_THERMAL_NOTIFY_HOT 0xF1
63#define ACPI_THERMAL_MODE_ACTIVE 0x00
64
65#define ACPI_THERMAL_MAX_ACTIVE 10
66#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
67
68#define _COMPONENT ACPI_THERMAL_COMPONENT
69ACPI_MODULE_NAME("thermal");
70
71MODULE_AUTHOR("Paul Diefenbaugh");
72MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
73MODULE_LICENSE("GPL");
74
75static int act;
76module_param(act, int, 0644);
77MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
78
79static int crt;
80module_param(crt, int, 0644);
81MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
82
83static int tzp;
84module_param(tzp, int, 0444);
85MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
86
87static int nocrt;
88module_param(nocrt, int, 0);
89MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
90
91static int off;
92module_param(off, int, 0);
93MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
94
95static int psv;
96module_param(psv, int, 0644);
97MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
98
99static int acpi_thermal_add(struct acpi_device *device);
100static int acpi_thermal_remove(struct acpi_device *device);
101static void acpi_thermal_notify(struct acpi_device *device, u32 event);
102
103static const struct acpi_device_id thermal_device_ids[] = {
104 {ACPI_THERMAL_HID, 0},
105 {"", 0},
106};
107MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
108
109#ifdef CONFIG_PM_SLEEP
110static int acpi_thermal_resume(struct device *dev);
111#endif
112static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume);
113
114static struct acpi_driver acpi_thermal_driver = {
115 .name = "thermal",
116 .class = ACPI_THERMAL_CLASS,
117 .ids = thermal_device_ids,
118 .ops = {
119 .add = acpi_thermal_add,
120 .remove = acpi_thermal_remove,
121 .notify = acpi_thermal_notify,
122 },
123 .drv.pm = &acpi_thermal_pm,
124};
125
126struct acpi_thermal_state {
127 u8 critical:1;
128 u8 hot:1;
129 u8 passive:1;
130 u8 active:1;
131 u8 reserved:4;
132 int active_index;
133};
134
135struct acpi_thermal_state_flags {
136 u8 valid:1;
137 u8 enabled:1;
138 u8 reserved:6;
139};
140
141struct acpi_thermal_critical {
142 struct acpi_thermal_state_flags flags;
143 unsigned long temperature;
144};
145
146struct acpi_thermal_hot {
147 struct acpi_thermal_state_flags flags;
148 unsigned long temperature;
149};
150
151struct acpi_thermal_passive {
152 struct acpi_thermal_state_flags flags;
153 unsigned long temperature;
154 unsigned long tc1;
155 unsigned long tc2;
156 unsigned long tsp;
157 struct acpi_handle_list devices;
158};
159
160struct acpi_thermal_active {
161 struct acpi_thermal_state_flags flags;
162 unsigned long temperature;
163 struct acpi_handle_list devices;
164};
165
166struct acpi_thermal_trips {
167 struct acpi_thermal_critical critical;
168 struct acpi_thermal_hot hot;
169 struct acpi_thermal_passive passive;
170 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
171};
172
173struct acpi_thermal_flags {
174 u8 cooling_mode:1;
175 u8 devices:1;
176 u8 reserved:6;
177};
178
179struct acpi_thermal {
180 struct acpi_device * device;
181 acpi_bus_id name;
182 unsigned long temperature;
183 unsigned long last_temperature;
184 unsigned long polling_frequency;
185 volatile u8 zombie;
186 struct acpi_thermal_flags flags;
187 struct acpi_thermal_state state;
188 struct acpi_thermal_trips trips;
189 struct acpi_handle_list devices;
190 struct thermal_zone_device *thermal_zone;
191 int tz_enabled;
192 int kelvin_offset;
193 struct mutex lock;
194};
195
196
197
198
199
200static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
201{
202 acpi_status status = AE_OK;
203 unsigned long long tmp;
204
205 if (!tz)
206 return -EINVAL;
207
208 tz->last_temperature = tz->temperature;
209
210 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
211 if (ACPI_FAILURE(status))
212 return -ENODEV;
213
214 tz->temperature = tmp;
215 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
216 tz->temperature));
217
218 return 0;
219}
220
221static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
222{
223 acpi_status status = AE_OK;
224 unsigned long long tmp;
225
226 if (!tz)
227 return -EINVAL;
228
229 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
230 if (ACPI_FAILURE(status))
231 return -ENODEV;
232
233 tz->polling_frequency = tmp;
234 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
235 tz->polling_frequency));
236
237 return 0;
238}
239
240static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
241{
242 if (!tz)
243 return -EINVAL;
244
245 if (!acpi_has_method(tz->device->handle, "_SCP")) {
246 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
247 return -ENODEV;
248 } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle,
249 "_SCP", mode))) {
250 return -ENODEV;
251 }
252
253 return 0;
254}
255
256#define ACPI_TRIPS_CRITICAL 0x01
257#define ACPI_TRIPS_HOT 0x02
258#define ACPI_TRIPS_PASSIVE 0x04
259#define ACPI_TRIPS_ACTIVE 0x08
260#define ACPI_TRIPS_DEVICES 0x10
261
262#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
263#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
264
265#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
266 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
267 ACPI_TRIPS_DEVICES)
268
269
270
271
272
273
274
275
276#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
277do { \
278 if (flags != ACPI_TRIPS_INIT) \
279 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
280 "ACPI thermal trip point %s changed\n" \
281 "Please send acpidump to linux-acpi@vger.kernel.org", str)); \
282} while (0)
283
284static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
285{
286 acpi_status status = AE_OK;
287 unsigned long long tmp;
288 struct acpi_handle_list devices;
289 int valid = 0;
290 int i;
291
292
293 if (flag & ACPI_TRIPS_CRITICAL) {
294 status = acpi_evaluate_integer(tz->device->handle,
295 "_CRT", NULL, &tmp);
296 tz->trips.critical.temperature = tmp;
297
298
299
300
301
302
303 if (ACPI_FAILURE(status)) {
304 tz->trips.critical.flags.valid = 0;
305 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
306 "No critical threshold\n"));
307 } else if (tmp <= 2732) {
308 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
309 "(%llu)\n", tmp);
310 tz->trips.critical.flags.valid = 0;
311 } else {
312 tz->trips.critical.flags.valid = 1;
313 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
314 "Found critical threshold [%lu]\n",
315 tz->trips.critical.temperature));
316 }
317 if (tz->trips.critical.flags.valid == 1) {
318 if (crt == -1) {
319 tz->trips.critical.flags.valid = 0;
320 } else if (crt > 0) {
321 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
322
323
324
325 if (crt_k > tz->trips.critical.temperature)
326 printk(KERN_WARNING PREFIX
327 "Critical threshold %d C\n", crt);
328 tz->trips.critical.temperature = crt_k;
329 }
330 }
331 }
332
333
334 if (flag & ACPI_TRIPS_HOT) {
335 status = acpi_evaluate_integer(tz->device->handle,
336 "_HOT", NULL, &tmp);
337 if (ACPI_FAILURE(status)) {
338 tz->trips.hot.flags.valid = 0;
339 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
340 "No hot threshold\n"));
341 } else {
342 tz->trips.hot.temperature = tmp;
343 tz->trips.hot.flags.valid = 1;
344 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
345 "Found hot threshold [%lu]\n",
346 tz->trips.critical.temperature));
347 }
348 }
349
350
351 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
352 (flag == ACPI_TRIPS_INIT)) {
353 valid = tz->trips.passive.flags.valid;
354 if (psv == -1) {
355 status = AE_SUPPORT;
356 } else if (psv > 0) {
357 tmp = CELSIUS_TO_KELVIN(psv);
358 status = AE_OK;
359 } else {
360 status = acpi_evaluate_integer(tz->device->handle,
361 "_PSV", NULL, &tmp);
362 }
363
364 if (ACPI_FAILURE(status))
365 tz->trips.passive.flags.valid = 0;
366 else {
367 tz->trips.passive.temperature = tmp;
368 tz->trips.passive.flags.valid = 1;
369 if (flag == ACPI_TRIPS_INIT) {
370 status = acpi_evaluate_integer(
371 tz->device->handle, "_TC1",
372 NULL, &tmp);
373 if (ACPI_FAILURE(status))
374 tz->trips.passive.flags.valid = 0;
375 else
376 tz->trips.passive.tc1 = tmp;
377 status = acpi_evaluate_integer(
378 tz->device->handle, "_TC2",
379 NULL, &tmp);
380 if (ACPI_FAILURE(status))
381 tz->trips.passive.flags.valid = 0;
382 else
383 tz->trips.passive.tc2 = tmp;
384 status = acpi_evaluate_integer(
385 tz->device->handle, "_TSP",
386 NULL, &tmp);
387 if (ACPI_FAILURE(status))
388 tz->trips.passive.flags.valid = 0;
389 else
390 tz->trips.passive.tsp = tmp;
391 }
392 }
393 }
394 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
395 memset(&devices, 0, sizeof(struct acpi_handle_list));
396 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
397 NULL, &devices);
398 if (ACPI_FAILURE(status)) {
399 printk(KERN_WARNING PREFIX
400 "Invalid passive threshold\n");
401 tz->trips.passive.flags.valid = 0;
402 }
403 else
404 tz->trips.passive.flags.valid = 1;
405
406 if (memcmp(&tz->trips.passive.devices, &devices,
407 sizeof(struct acpi_handle_list))) {
408 memcpy(&tz->trips.passive.devices, &devices,
409 sizeof(struct acpi_handle_list));
410 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
411 }
412 }
413 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
414 if (valid != tz->trips.passive.flags.valid)
415 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
416 }
417
418
419 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
420 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
421 valid = tz->trips.active[i].flags.valid;
422
423 if (act == -1)
424 break;
425
426 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
427 tz->trips.active[i].flags.valid)) {
428 status = acpi_evaluate_integer(tz->device->handle,
429 name, NULL, &tmp);
430 if (ACPI_FAILURE(status)) {
431 tz->trips.active[i].flags.valid = 0;
432 if (i == 0)
433 break;
434 if (act <= 0)
435 break;
436 if (i == 1)
437 tz->trips.active[0].temperature =
438 CELSIUS_TO_KELVIN(act);
439 else
440
441
442
443
444 tz->trips.active[i - 1].temperature =
445 (tz->trips.active[i - 2].temperature <
446 CELSIUS_TO_KELVIN(act) ?
447 tz->trips.active[i - 2].temperature :
448 CELSIUS_TO_KELVIN(act));
449 break;
450 } else {
451 tz->trips.active[i].temperature = tmp;
452 tz->trips.active[i].flags.valid = 1;
453 }
454 }
455
456 name[2] = 'L';
457 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
458 memset(&devices, 0, sizeof(struct acpi_handle_list));
459 status = acpi_evaluate_reference(tz->device->handle,
460 name, NULL, &devices);
461 if (ACPI_FAILURE(status)) {
462 printk(KERN_WARNING PREFIX
463 "Invalid active%d threshold\n", i);
464 tz->trips.active[i].flags.valid = 0;
465 }
466 else
467 tz->trips.active[i].flags.valid = 1;
468
469 if (memcmp(&tz->trips.active[i].devices, &devices,
470 sizeof(struct acpi_handle_list))) {
471 memcpy(&tz->trips.active[i].devices, &devices,
472 sizeof(struct acpi_handle_list));
473 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
474 }
475 }
476 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
477 if (valid != tz->trips.active[i].flags.valid)
478 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
479
480 if (!tz->trips.active[i].flags.valid)
481 break;
482 }
483
484 if (flag & ACPI_TRIPS_DEVICES) {
485 memset(&devices, 0, sizeof(struct acpi_handle_list));
486 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
487 NULL, &devices);
488 if (memcmp(&tz->devices, &devices,
489 sizeof(struct acpi_handle_list))) {
490 memcpy(&tz->devices, &devices,
491 sizeof(struct acpi_handle_list));
492 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
493 }
494 }
495
496 return 0;
497}
498
499static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
500{
501 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
502
503 if (ret)
504 return ret;
505
506 valid = tz->trips.critical.flags.valid |
507 tz->trips.hot.flags.valid |
508 tz->trips.passive.flags.valid;
509
510 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
511 valid |= tz->trips.active[i].flags.valid;
512
513 if (!valid) {
514 printk(KERN_WARNING FW_BUG "No valid trip found\n");
515 return -ENODEV;
516 }
517 return 0;
518}
519
520static void acpi_thermal_check(void *data)
521{
522 struct acpi_thermal *tz = data;
523
524 if (!tz->tz_enabled) {
525 pr_warn("thermal zone is disabled \n");
526 return;
527 }
528 thermal_zone_device_update(tz->thermal_zone);
529}
530
531
532#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
533
534static int thermal_get_temp(struct thermal_zone_device *thermal,
535 unsigned long *temp)
536{
537 struct acpi_thermal *tz = thermal->devdata;
538 int result;
539
540 if (!tz)
541 return -EINVAL;
542
543 result = acpi_thermal_get_temperature(tz);
544 if (result)
545 return result;
546
547 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
548 return 0;
549}
550
551static int thermal_get_mode(struct thermal_zone_device *thermal,
552 enum thermal_device_mode *mode)
553{
554 struct acpi_thermal *tz = thermal->devdata;
555
556 if (!tz)
557 return -EINVAL;
558
559 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
560 THERMAL_DEVICE_DISABLED;
561
562 return 0;
563}
564
565static int thermal_set_mode(struct thermal_zone_device *thermal,
566 enum thermal_device_mode mode)
567{
568 struct acpi_thermal *tz = thermal->devdata;
569 int enable;
570
571 if (!tz)
572 return -EINVAL;
573
574
575
576
577 if (mode == THERMAL_DEVICE_ENABLED)
578 enable = 1;
579 else if (mode == THERMAL_DEVICE_DISABLED)
580 enable = 0;
581 else
582 return -EINVAL;
583
584 if (enable != tz->tz_enabled) {
585 tz->tz_enabled = enable;
586 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
587 "%s kernel ACPI thermal control\n",
588 tz->tz_enabled ? "Enable" : "Disable"));
589 acpi_thermal_check(tz);
590 }
591 return 0;
592}
593
594static int thermal_get_trip_type(struct thermal_zone_device *thermal,
595 int trip, enum thermal_trip_type *type)
596{
597 struct acpi_thermal *tz = thermal->devdata;
598 int i;
599
600 if (!tz || trip < 0)
601 return -EINVAL;
602
603 if (tz->trips.critical.flags.valid) {
604 if (!trip) {
605 *type = THERMAL_TRIP_CRITICAL;
606 return 0;
607 }
608 trip--;
609 }
610
611 if (tz->trips.hot.flags.valid) {
612 if (!trip) {
613 *type = THERMAL_TRIP_HOT;
614 return 0;
615 }
616 trip--;
617 }
618
619 if (tz->trips.passive.flags.valid) {
620 if (!trip) {
621 *type = THERMAL_TRIP_PASSIVE;
622 return 0;
623 }
624 trip--;
625 }
626
627 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
628 tz->trips.active[i].flags.valid; i++) {
629 if (!trip) {
630 *type = THERMAL_TRIP_ACTIVE;
631 return 0;
632 }
633 trip--;
634 }
635
636 return -EINVAL;
637}
638
639static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
640 int trip, unsigned long *temp)
641{
642 struct acpi_thermal *tz = thermal->devdata;
643 int i;
644
645 if (!tz || trip < 0)
646 return -EINVAL;
647
648 if (tz->trips.critical.flags.valid) {
649 if (!trip) {
650 *temp = KELVIN_TO_MILLICELSIUS(
651 tz->trips.critical.temperature,
652 tz->kelvin_offset);
653 return 0;
654 }
655 trip--;
656 }
657
658 if (tz->trips.hot.flags.valid) {
659 if (!trip) {
660 *temp = KELVIN_TO_MILLICELSIUS(
661 tz->trips.hot.temperature,
662 tz->kelvin_offset);
663 return 0;
664 }
665 trip--;
666 }
667
668 if (tz->trips.passive.flags.valid) {
669 if (!trip) {
670 *temp = KELVIN_TO_MILLICELSIUS(
671 tz->trips.passive.temperature,
672 tz->kelvin_offset);
673 return 0;
674 }
675 trip--;
676 }
677
678 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
679 tz->trips.active[i].flags.valid; i++) {
680 if (!trip) {
681 *temp = KELVIN_TO_MILLICELSIUS(
682 tz->trips.active[i].temperature,
683 tz->kelvin_offset);
684 return 0;
685 }
686 trip--;
687 }
688
689 return -EINVAL;
690}
691
692static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
693 unsigned long *temperature) {
694 struct acpi_thermal *tz = thermal->devdata;
695
696 if (tz->trips.critical.flags.valid) {
697 *temperature = KELVIN_TO_MILLICELSIUS(
698 tz->trips.critical.temperature,
699 tz->kelvin_offset);
700 return 0;
701 } else
702 return -EINVAL;
703}
704
705static int thermal_get_trend(struct thermal_zone_device *thermal,
706 int trip, enum thermal_trend *trend)
707{
708 struct acpi_thermal *tz = thermal->devdata;
709 enum thermal_trip_type type;
710 int i;
711
712 if (thermal_get_trip_type(thermal, trip, &type))
713 return -EINVAL;
714
715 if (type == THERMAL_TRIP_ACTIVE) {
716 unsigned long trip_temp;
717 unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature,
718 tz->kelvin_offset);
719 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
720 return -EINVAL;
721
722 if (temp > trip_temp) {
723 *trend = THERMAL_TREND_RAISING;
724 return 0;
725 } else {
726
727 return -EINVAL;
728 }
729 }
730
731
732
733
734
735 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
736 + (tz->trips.passive.tc2
737 * (tz->temperature - tz->trips.passive.temperature));
738
739 if (i > 0)
740 *trend = THERMAL_TREND_RAISING;
741 else if (i < 0)
742 *trend = THERMAL_TREND_DROPPING;
743 else
744 *trend = THERMAL_TREND_STABLE;
745 return 0;
746}
747
748
749static int thermal_notify(struct thermal_zone_device *thermal, int trip,
750 enum thermal_trip_type trip_type)
751{
752 u8 type = 0;
753 struct acpi_thermal *tz = thermal->devdata;
754
755 if (trip_type == THERMAL_TRIP_CRITICAL)
756 type = ACPI_THERMAL_NOTIFY_CRITICAL;
757 else if (trip_type == THERMAL_TRIP_HOT)
758 type = ACPI_THERMAL_NOTIFY_HOT;
759 else
760 return 0;
761
762 acpi_bus_generate_proc_event(tz->device, type, 1);
763 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
764 dev_name(&tz->device->dev), type, 1);
765
766 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
767 return 1;
768
769 return 0;
770}
771
772static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
773 struct thermal_cooling_device *cdev,
774 bool bind)
775{
776 struct acpi_device *device = cdev->devdata;
777 struct acpi_thermal *tz = thermal->devdata;
778 struct acpi_device *dev;
779 acpi_status status;
780 acpi_handle handle;
781 int i;
782 int j;
783 int trip = -1;
784 int result = 0;
785
786 if (tz->trips.critical.flags.valid)
787 trip++;
788
789 if (tz->trips.hot.flags.valid)
790 trip++;
791
792 if (tz->trips.passive.flags.valid) {
793 trip++;
794 for (i = 0; i < tz->trips.passive.devices.count;
795 i++) {
796 handle = tz->trips.passive.devices.handles[i];
797 status = acpi_bus_get_device(handle, &dev);
798 if (ACPI_FAILURE(status) || dev != device)
799 continue;
800 if (bind)
801 result =
802 thermal_zone_bind_cooling_device
803 (thermal, trip, cdev,
804 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
805 else
806 result =
807 thermal_zone_unbind_cooling_device
808 (thermal, trip, cdev);
809 if (result)
810 goto failed;
811 }
812 }
813
814 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
815 if (!tz->trips.active[i].flags.valid)
816 break;
817 trip++;
818 for (j = 0;
819 j < tz->trips.active[i].devices.count;
820 j++) {
821 handle = tz->trips.active[i].devices.handles[j];
822 status = acpi_bus_get_device(handle, &dev);
823 if (ACPI_FAILURE(status) || dev != device)
824 continue;
825 if (bind)
826 result = thermal_zone_bind_cooling_device
827 (thermal, trip, cdev,
828 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
829 else
830 result = thermal_zone_unbind_cooling_device
831 (thermal, trip, cdev);
832 if (result)
833 goto failed;
834 }
835 }
836
837 for (i = 0; i < tz->devices.count; i++) {
838 handle = tz->devices.handles[i];
839 status = acpi_bus_get_device(handle, &dev);
840 if (ACPI_SUCCESS(status) && (dev == device)) {
841 if (bind)
842 result = thermal_zone_bind_cooling_device
843 (thermal, -1, cdev,
844 THERMAL_NO_LIMIT,
845 THERMAL_NO_LIMIT);
846 else
847 result = thermal_zone_unbind_cooling_device
848 (thermal, -1, cdev);
849 if (result)
850 goto failed;
851 }
852 }
853
854failed:
855 return result;
856}
857
858static int
859acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
860 struct thermal_cooling_device *cdev)
861{
862 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
863}
864
865static int
866acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
867 struct thermal_cooling_device *cdev)
868{
869 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
870}
871
872static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
873 .bind = acpi_thermal_bind_cooling_device,
874 .unbind = acpi_thermal_unbind_cooling_device,
875 .get_temp = thermal_get_temp,
876 .get_mode = thermal_get_mode,
877 .set_mode = thermal_set_mode,
878 .get_trip_type = thermal_get_trip_type,
879 .get_trip_temp = thermal_get_trip_temp,
880 .get_crit_temp = thermal_get_crit_temp,
881 .get_trend = thermal_get_trend,
882 .notify = thermal_notify,
883};
884
885static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
886{
887 int trips = 0;
888 int result;
889 acpi_status status;
890 int i;
891
892 if (tz->trips.critical.flags.valid)
893 trips++;
894
895 if (tz->trips.hot.flags.valid)
896 trips++;
897
898 if (tz->trips.passive.flags.valid)
899 trips++;
900
901 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
902 tz->trips.active[i].flags.valid; i++, trips++);
903
904 if (tz->trips.passive.flags.valid)
905 tz->thermal_zone =
906 thermal_zone_device_register("acpitz", trips, 0, tz,
907 &acpi_thermal_zone_ops, NULL,
908 tz->trips.passive.tsp*100,
909 tz->polling_frequency*100);
910 else
911 tz->thermal_zone =
912 thermal_zone_device_register("acpitz", trips, 0, tz,
913 &acpi_thermal_zone_ops, NULL,
914 0, 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
944static 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
956
957
958static void acpi_thermal_notify(struct acpi_device *device, u32 event)
959{
960 struct acpi_thermal *tz = acpi_driver_data(device);
961
962
963 if (!tz)
964 return;
965
966 switch (event) {
967 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
968 acpi_thermal_check(tz);
969 break;
970 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
971 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
972 acpi_thermal_check(tz);
973 acpi_bus_generate_proc_event(device, event, 0);
974 acpi_bus_generate_netlink_event(device->pnp.device_class,
975 dev_name(&device->dev), event, 0);
976 break;
977 case ACPI_THERMAL_NOTIFY_DEVICES:
978 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
979 acpi_thermal_check(tz);
980 acpi_bus_generate_proc_event(device, event, 0);
981 acpi_bus_generate_netlink_event(device->pnp.device_class,
982 dev_name(&device->dev), event, 0);
983 break;
984 default:
985 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
986 "Unsupported event [0x%x]\n", event));
987 break;
988 }
989}
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
1004{
1005 acpi_handle handle = tz->device->handle;
1006 unsigned long long value;
1007 int i;
1008
1009 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1010 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1011 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1012 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1013 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1014 acpi_status status;
1015
1016 status = acpi_evaluate_integer(handle, name, NULL, &value);
1017 if (status == AE_NOT_FOUND)
1018 break;
1019 }
1020 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1021}
1022
1023static int acpi_thermal_get_info(struct acpi_thermal *tz)
1024{
1025 int result = 0;
1026
1027
1028 if (!tz)
1029 return -EINVAL;
1030
1031 acpi_thermal_aml_dependency_fix(tz);
1032
1033
1034 result = acpi_thermal_get_trip_points(tz);
1035 if (result)
1036 return result;
1037
1038
1039 result = acpi_thermal_get_temperature(tz);
1040 if (result)
1041 return result;
1042
1043
1044 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1045 if (!result)
1046 tz->flags.cooling_mode = 1;
1047
1048
1049 if (tzp)
1050 tz->polling_frequency = tzp;
1051 else
1052 acpi_thermal_get_polling_frequency(tz);
1053
1054 return 0;
1055}
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1068{
1069 if (tz->trips.critical.flags.valid &&
1070 (tz->trips.critical.temperature % 5) == 1)
1071 tz->kelvin_offset = 2731;
1072 else
1073 tz->kelvin_offset = 2732;
1074}
1075
1076static int acpi_thermal_add(struct acpi_device *device)
1077{
1078 int result = 0;
1079 struct acpi_thermal *tz = NULL;
1080
1081
1082 if (!device)
1083 return -EINVAL;
1084
1085 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1086 if (!tz)
1087 return -ENOMEM;
1088
1089 tz->device = device;
1090 strcpy(tz->name, device->pnp.bus_id);
1091 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1092 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1093 device->driver_data = tz;
1094 mutex_init(&tz->lock);
1095
1096
1097 result = acpi_thermal_get_info(tz);
1098 if (result)
1099 goto free_memory;
1100
1101 acpi_thermal_guess_offset(tz);
1102
1103 result = acpi_thermal_register_thermal_zone(tz);
1104 if (result)
1105 goto free_memory;
1106
1107 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1108 acpi_device_name(device), acpi_device_bid(device),
1109 KELVIN_TO_CELSIUS(tz->temperature));
1110 goto end;
1111
1112free_memory:
1113 kfree(tz);
1114end:
1115 return result;
1116}
1117
1118static int acpi_thermal_remove(struct acpi_device *device)
1119{
1120 struct acpi_thermal *tz = NULL;
1121
1122 if (!device || !acpi_driver_data(device))
1123 return -EINVAL;
1124
1125 tz = acpi_driver_data(device);
1126
1127 acpi_thermal_unregister_thermal_zone(tz);
1128 mutex_destroy(&tz->lock);
1129 kfree(tz);
1130 return 0;
1131}
1132
1133#ifdef CONFIG_PM_SLEEP
1134static int acpi_thermal_resume(struct device *dev)
1135{
1136 struct acpi_thermal *tz;
1137 int i, j, power_state, result;
1138
1139 if (!dev)
1140 return -EINVAL;
1141
1142 tz = acpi_driver_data(to_acpi_device(dev));
1143 if (!tz)
1144 return -EINVAL;
1145
1146 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1147 if (!(&tz->trips.active[i]))
1148 break;
1149 if (!tz->trips.active[i].flags.valid)
1150 break;
1151 tz->trips.active[i].flags.enabled = 1;
1152 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1153 result = acpi_bus_update_power(
1154 tz->trips.active[i].devices.handles[j],
1155 &power_state);
1156 if (result || (power_state != ACPI_STATE_D0)) {
1157 tz->trips.active[i].flags.enabled = 0;
1158 break;
1159 }
1160 }
1161 tz->state.active |= tz->trips.active[i].flags.enabled;
1162 }
1163
1164 acpi_thermal_check(tz);
1165
1166 return AE_OK;
1167}
1168#endif
1169
1170static int thermal_act(const struct dmi_system_id *d) {
1171
1172 if (act == 0) {
1173 printk(KERN_NOTICE "ACPI: %s detected: "
1174 "disabling all active thermal trip points\n", d->ident);
1175 act = -1;
1176 }
1177 return 0;
1178}
1179static int thermal_nocrt(const struct dmi_system_id *d) {
1180
1181 printk(KERN_NOTICE "ACPI: %s detected: "
1182 "disabling all critical thermal trip point actions.\n", d->ident);
1183 nocrt = 1;
1184 return 0;
1185}
1186static int thermal_tzp(const struct dmi_system_id *d) {
1187
1188 if (tzp == 0) {
1189 printk(KERN_NOTICE "ACPI: %s detected: "
1190 "enabling thermal zone polling\n", d->ident);
1191 tzp = 300;
1192 }
1193 return 0;
1194}
1195static int thermal_psv(const struct dmi_system_id *d) {
1196
1197 if (psv == 0) {
1198 printk(KERN_NOTICE "ACPI: %s detected: "
1199 "disabling all passive thermal trip points\n", d->ident);
1200 psv = -1;
1201 }
1202 return 0;
1203}
1204
1205static struct dmi_system_id thermal_dmi_table[] __initdata = {
1206
1207
1208
1209
1210 {
1211 .callback = thermal_act,
1212 .ident = "AOpen i915GMm-HFS",
1213 .matches = {
1214 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1215 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1216 },
1217 },
1218 {
1219 .callback = thermal_psv,
1220 .ident = "AOpen i915GMm-HFS",
1221 .matches = {
1222 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1223 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1224 },
1225 },
1226 {
1227 .callback = thermal_tzp,
1228 .ident = "AOpen i915GMm-HFS",
1229 .matches = {
1230 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1231 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1232 },
1233 },
1234 {
1235 .callback = thermal_nocrt,
1236 .ident = "Gigabyte GA-7ZX",
1237 .matches = {
1238 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1239 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1240 },
1241 },
1242 {}
1243};
1244
1245static int __init acpi_thermal_init(void)
1246{
1247 int result = 0;
1248
1249 dmi_check_system(thermal_dmi_table);
1250
1251 if (off) {
1252 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1253 return -ENODEV;
1254 }
1255
1256 result = acpi_bus_register_driver(&acpi_thermal_driver);
1257 if (result < 0)
1258 return -ENODEV;
1259
1260 return 0;
1261}
1262
1263static void __exit acpi_thermal_exit(void)
1264{
1265
1266 acpi_bus_unregister_driver(&acpi_thermal_driver);
1267
1268 return;
1269}
1270
1271module_init(acpi_thermal_init);
1272module_exit(acpi_thermal_exit);
1273
