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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_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, int type);
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 acpi_status status = AE_OK;
243 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
244 struct acpi_object_list arg_list = { 1, &arg0 };
245 acpi_handle handle = NULL;
246
247
248 if (!tz)
249 return -EINVAL;
250
251 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
252 if (ACPI_FAILURE(status)) {
253 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
254 return -ENODEV;
255 }
256
257 arg0.integer.value = mode;
258
259 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
260 if (ACPI_FAILURE(status))
261 return -ENODEV;
262
263 return 0;
264}
265
266#define ACPI_TRIPS_CRITICAL 0x01
267#define ACPI_TRIPS_HOT 0x02
268#define ACPI_TRIPS_PASSIVE 0x04
269#define ACPI_TRIPS_ACTIVE 0x08
270#define ACPI_TRIPS_DEVICES 0x10
271
272#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
273#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
274
275#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
276 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
277 ACPI_TRIPS_DEVICES)
278
279
280
281
282
283
284
285
286#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
287do { \
288 if (flags != ACPI_TRIPS_INIT) \
289 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
290 "ACPI thermal trip point %s changed\n" \
291 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
292} while (0)
293
294static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
295{
296 acpi_status status = AE_OK;
297 unsigned long long tmp;
298 struct acpi_handle_list devices;
299 int valid = 0;
300 int i;
301
302
303 if (flag & ACPI_TRIPS_CRITICAL) {
304 status = acpi_evaluate_integer(tz->device->handle,
305 "_CRT", NULL, &tmp);
306 tz->trips.critical.temperature = tmp;
307
308
309
310
311
312
313 if (ACPI_FAILURE(status)) {
314 tz->trips.critical.flags.valid = 0;
315 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
316 "No critical threshold\n"));
317 } else if (tmp <= 2732) {
318 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
319 "(%llu)\n", tmp);
320 tz->trips.critical.flags.valid = 0;
321 } else {
322 tz->trips.critical.flags.valid = 1;
323 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
324 "Found critical threshold [%lu]\n",
325 tz->trips.critical.temperature));
326 }
327 if (tz->trips.critical.flags.valid == 1) {
328 if (crt == -1) {
329 tz->trips.critical.flags.valid = 0;
330 } else if (crt > 0) {
331 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
332
333
334
335 if (crt_k > tz->trips.critical.temperature)
336 printk(KERN_WARNING PREFIX
337 "Critical threshold %d C\n", crt);
338 tz->trips.critical.temperature = crt_k;
339 }
340 }
341 }
342
343
344 if (flag & ACPI_TRIPS_HOT) {
345 status = acpi_evaluate_integer(tz->device->handle,
346 "_HOT", NULL, &tmp);
347 if (ACPI_FAILURE(status)) {
348 tz->trips.hot.flags.valid = 0;
349 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
350 "No hot threshold\n"));
351 } else {
352 tz->trips.hot.temperature = tmp;
353 tz->trips.hot.flags.valid = 1;
354 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
355 "Found hot threshold [%lu]\n",
356 tz->trips.critical.temperature));
357 }
358 }
359
360
361 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
362 (flag == ACPI_TRIPS_INIT)) {
363 valid = tz->trips.passive.flags.valid;
364 if (psv == -1) {
365 status = AE_SUPPORT;
366 } else if (psv > 0) {
367 tmp = CELSIUS_TO_KELVIN(psv);
368 status = AE_OK;
369 } else {
370 status = acpi_evaluate_integer(tz->device->handle,
371 "_PSV", NULL, &tmp);
372 }
373
374 if (ACPI_FAILURE(status))
375 tz->trips.passive.flags.valid = 0;
376 else {
377 tz->trips.passive.temperature = tmp;
378 tz->trips.passive.flags.valid = 1;
379 if (flag == ACPI_TRIPS_INIT) {
380 status = acpi_evaluate_integer(
381 tz->device->handle, "_TC1",
382 NULL, &tmp);
383 if (ACPI_FAILURE(status))
384 tz->trips.passive.flags.valid = 0;
385 else
386 tz->trips.passive.tc1 = tmp;
387 status = acpi_evaluate_integer(
388 tz->device->handle, "_TC2",
389 NULL, &tmp);
390 if (ACPI_FAILURE(status))
391 tz->trips.passive.flags.valid = 0;
392 else
393 tz->trips.passive.tc2 = tmp;
394 status = acpi_evaluate_integer(
395 tz->device->handle, "_TSP",
396 NULL, &tmp);
397 if (ACPI_FAILURE(status))
398 tz->trips.passive.flags.valid = 0;
399 else
400 tz->trips.passive.tsp = tmp;
401 }
402 }
403 }
404 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
405 memset(&devices, 0, sizeof(struct acpi_handle_list));
406 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
407 NULL, &devices);
408 if (ACPI_FAILURE(status)) {
409 printk(KERN_WARNING PREFIX
410 "Invalid passive threshold\n");
411 tz->trips.passive.flags.valid = 0;
412 }
413 else
414 tz->trips.passive.flags.valid = 1;
415
416 if (memcmp(&tz->trips.passive.devices, &devices,
417 sizeof(struct acpi_handle_list))) {
418 memcpy(&tz->trips.passive.devices, &devices,
419 sizeof(struct acpi_handle_list));
420 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
421 }
422 }
423 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
424 if (valid != tz->trips.passive.flags.valid)
425 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
426 }
427
428
429 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
430 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
431 valid = tz->trips.active[i].flags.valid;
432
433 if (act == -1)
434 break;
435
436 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
437 tz->trips.active[i].flags.valid)) {
438 status = acpi_evaluate_integer(tz->device->handle,
439 name, NULL, &tmp);
440 if (ACPI_FAILURE(status)) {
441 tz->trips.active[i].flags.valid = 0;
442 if (i == 0)
443 break;
444 if (act <= 0)
445 break;
446 if (i == 1)
447 tz->trips.active[0].temperature =
448 CELSIUS_TO_KELVIN(act);
449 else
450
451
452
453
454 tz->trips.active[i - 1].temperature =
455 (tz->trips.active[i - 2].temperature <
456 CELSIUS_TO_KELVIN(act) ?
457 tz->trips.active[i - 2].temperature :
458 CELSIUS_TO_KELVIN(act));
459 break;
460 } else {
461 tz->trips.active[i].temperature = tmp;
462 tz->trips.active[i].flags.valid = 1;
463 }
464 }
465
466 name[2] = 'L';
467 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
468 memset(&devices, 0, sizeof(struct acpi_handle_list));
469 status = acpi_evaluate_reference(tz->device->handle,
470 name, NULL, &devices);
471 if (ACPI_FAILURE(status)) {
472 printk(KERN_WARNING PREFIX
473 "Invalid active%d threshold\n", i);
474 tz->trips.active[i].flags.valid = 0;
475 }
476 else
477 tz->trips.active[i].flags.valid = 1;
478
479 if (memcmp(&tz->trips.active[i].devices, &devices,
480 sizeof(struct acpi_handle_list))) {
481 memcpy(&tz->trips.active[i].devices, &devices,
482 sizeof(struct acpi_handle_list));
483 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
484 }
485 }
486 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
487 if (valid != tz->trips.active[i].flags.valid)
488 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
489
490 if (!tz->trips.active[i].flags.valid)
491 break;
492 }
493
494 if (flag & ACPI_TRIPS_DEVICES) {
495 memset(&devices, 0, sizeof(struct acpi_handle_list));
496 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
497 NULL, &devices);
498 if (memcmp(&tz->devices, &devices,
499 sizeof(struct acpi_handle_list))) {
500 memcpy(&tz->devices, &devices,
501 sizeof(struct acpi_handle_list));
502 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
503 }
504 }
505
506 return 0;
507}
508
509static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
510{
511 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
512
513 if (ret)
514 return ret;
515
516 valid = tz->trips.critical.flags.valid |
517 tz->trips.hot.flags.valid |
518 tz->trips.passive.flags.valid;
519
520 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
521 valid |= tz->trips.active[i].flags.valid;
522
523 if (!valid) {
524 printk(KERN_WARNING FW_BUG "No valid trip found\n");
525 return -ENODEV;
526 }
527 return 0;
528}
529
530static void acpi_thermal_check(void *data)
531{
532 struct acpi_thermal *tz = data;
533
534 thermal_zone_device_update(tz->thermal_zone);
535}
536
537
538#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
539
540static int thermal_get_temp(struct thermal_zone_device *thermal,
541 unsigned long *temp)
542{
543 struct acpi_thermal *tz = thermal->devdata;
544 int result;
545
546 if (!tz)
547 return -EINVAL;
548
549 result = acpi_thermal_get_temperature(tz);
550 if (result)
551 return result;
552
553 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
554 return 0;
555}
556
557static int thermal_get_mode(struct thermal_zone_device *thermal,
558 enum thermal_device_mode *mode)
559{
560 struct acpi_thermal *tz = thermal->devdata;
561
562 if (!tz)
563 return -EINVAL;
564
565 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
566 THERMAL_DEVICE_DISABLED;
567
568 return 0;
569}
570
571static int thermal_set_mode(struct thermal_zone_device *thermal,
572 enum thermal_device_mode mode)
573{
574 struct acpi_thermal *tz = thermal->devdata;
575 int enable;
576
577 if (!tz)
578 return -EINVAL;
579
580
581
582
583 if (mode == THERMAL_DEVICE_ENABLED)
584 enable = 1;
585 else if (mode == THERMAL_DEVICE_DISABLED)
586 enable = 0;
587 else
588 return -EINVAL;
589
590 if (enable != tz->tz_enabled) {
591 tz->tz_enabled = enable;
592 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
593 "%s kernel ACPI thermal control\n",
594 tz->tz_enabled ? "Enable" : "Disable"));
595 acpi_thermal_check(tz);
596 }
597 return 0;
598}
599
600static int thermal_get_trip_type(struct thermal_zone_device *thermal,
601 int trip, enum thermal_trip_type *type)
602{
603 struct acpi_thermal *tz = thermal->devdata;
604 int i;
605
606 if (!tz || trip < 0)
607 return -EINVAL;
608
609 if (tz->trips.critical.flags.valid) {
610 if (!trip) {
611 *type = THERMAL_TRIP_CRITICAL;
612 return 0;
613 }
614 trip--;
615 }
616
617 if (tz->trips.hot.flags.valid) {
618 if (!trip) {
619 *type = THERMAL_TRIP_HOT;
620 return 0;
621 }
622 trip--;
623 }
624
625 if (tz->trips.passive.flags.valid) {
626 if (!trip) {
627 *type = THERMAL_TRIP_PASSIVE;
628 return 0;
629 }
630 trip--;
631 }
632
633 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
634 tz->trips.active[i].flags.valid; i++) {
635 if (!trip) {
636 *type = THERMAL_TRIP_ACTIVE;
637 return 0;
638 }
639 trip--;
640 }
641
642 return -EINVAL;
643}
644
645static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
646 int trip, unsigned long *temp)
647{
648 struct acpi_thermal *tz = thermal->devdata;
649 int i;
650
651 if (!tz || trip < 0)
652 return -EINVAL;
653
654 if (tz->trips.critical.flags.valid) {
655 if (!trip) {
656 *temp = KELVIN_TO_MILLICELSIUS(
657 tz->trips.critical.temperature,
658 tz->kelvin_offset);
659 return 0;
660 }
661 trip--;
662 }
663
664 if (tz->trips.hot.flags.valid) {
665 if (!trip) {
666 *temp = KELVIN_TO_MILLICELSIUS(
667 tz->trips.hot.temperature,
668 tz->kelvin_offset);
669 return 0;
670 }
671 trip--;
672 }
673
674 if (tz->trips.passive.flags.valid) {
675 if (!trip) {
676 *temp = KELVIN_TO_MILLICELSIUS(
677 tz->trips.passive.temperature,
678 tz->kelvin_offset);
679 return 0;
680 }
681 trip--;
682 }
683
684 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
685 tz->trips.active[i].flags.valid; i++) {
686 if (!trip) {
687 *temp = KELVIN_TO_MILLICELSIUS(
688 tz->trips.active[i].temperature,
689 tz->kelvin_offset);
690 return 0;
691 }
692 trip--;
693 }
694
695 return -EINVAL;
696}
697
698static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
699 unsigned long *temperature) {
700 struct acpi_thermal *tz = thermal->devdata;
701
702 if (tz->trips.critical.flags.valid) {
703 *temperature = KELVIN_TO_MILLICELSIUS(
704 tz->trips.critical.temperature,
705 tz->kelvin_offset);
706 return 0;
707 } else
708 return -EINVAL;
709}
710
711static int thermal_get_trend(struct thermal_zone_device *thermal,
712 int trip, enum thermal_trend *trend)
713{
714 struct acpi_thermal *tz = thermal->devdata;
715 enum thermal_trip_type type;
716 int i;
717
718 if (thermal_get_trip_type(thermal, trip, &type))
719 return -EINVAL;
720
721 if (type == THERMAL_TRIP_ACTIVE) {
722
723 *trend = THERMAL_TREND_RAISING;
724 return 0;
725 }
726
727
728
729
730
731 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
732 + (tz->trips.passive.tc2
733 * (tz->temperature - tz->trips.passive.temperature));
734
735 if (i > 0)
736 *trend = THERMAL_TREND_RAISING;
737 else if (i < 0)
738 *trend = THERMAL_TREND_DROPPING;
739 else
740 *trend = THERMAL_TREND_STABLE;
741 return 0;
742}
743
744
745static int thermal_notify(struct thermal_zone_device *thermal, int trip,
746 enum thermal_trip_type trip_type)
747{
748 u8 type = 0;
749 struct acpi_thermal *tz = thermal->devdata;
750
751 if (trip_type == THERMAL_TRIP_CRITICAL)
752 type = ACPI_THERMAL_NOTIFY_CRITICAL;
753 else if (trip_type == THERMAL_TRIP_HOT)
754 type = ACPI_THERMAL_NOTIFY_HOT;
755 else
756 return 0;
757
758 acpi_bus_generate_proc_event(tz->device, type, 1);
759 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
760 dev_name(&tz->device->dev), type, 1);
761
762 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
763 return 1;
764
765 return 0;
766}
767
768static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
769 struct thermal_cooling_device *cdev,
770 bool bind)
771{
772 struct acpi_device *device = cdev->devdata;
773 struct acpi_thermal *tz = thermal->devdata;
774 struct acpi_device *dev;
775 acpi_status status;
776 acpi_handle handle;
777 int i;
778 int j;
779 int trip = -1;
780 int result = 0;
781
782 if (tz->trips.critical.flags.valid)
783 trip++;
784
785 if (tz->trips.hot.flags.valid)
786 trip++;
787
788 if (tz->trips.passive.flags.valid) {
789 trip++;
790 for (i = 0; i < tz->trips.passive.devices.count;
791 i++) {
792 handle = tz->trips.passive.devices.handles[i];
793 status = acpi_bus_get_device(handle, &dev);
794 if (ACPI_FAILURE(status) || dev != device)
795 continue;
796 if (bind)
797 result =
798 thermal_zone_bind_cooling_device
799 (thermal, trip, cdev,
800 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
801 else
802 result =
803 thermal_zone_unbind_cooling_device
804 (thermal, trip, cdev);
805 if (result)
806 goto failed;
807 }
808 }
809
810 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
811 if (!tz->trips.active[i].flags.valid)
812 break;
813 trip++;
814 for (j = 0;
815 j < tz->trips.active[i].devices.count;
816 j++) {
817 handle = tz->trips.active[i].devices.handles[j];
818 status = acpi_bus_get_device(handle, &dev);
819 if (ACPI_FAILURE(status) || dev != device)
820 continue;
821 if (bind)
822 result = thermal_zone_bind_cooling_device
823 (thermal, trip, cdev,
824 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
825 else
826 result = thermal_zone_unbind_cooling_device
827 (thermal, trip, cdev);
828 if (result)
829 goto failed;
830 }
831 }
832
833 for (i = 0; i < tz->devices.count; i++) {
834 handle = tz->devices.handles[i];
835 status = acpi_bus_get_device(handle, &dev);
836 if (ACPI_SUCCESS(status) && (dev == device)) {
837 if (bind)
838 result = thermal_zone_bind_cooling_device
839 (thermal, -1, cdev,
840 THERMAL_NO_LIMIT,
841 THERMAL_NO_LIMIT);
842 else
843 result = thermal_zone_unbind_cooling_device
844 (thermal, -1, cdev);
845 if (result)
846 goto failed;
847 }
848 }
849
850failed:
851 return result;
852}
853
854static int
855acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
856 struct thermal_cooling_device *cdev)
857{
858 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
859}
860
861static int
862acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
863 struct thermal_cooling_device *cdev)
864{
865 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
866}
867
868static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
869 .bind = acpi_thermal_bind_cooling_device,
870 .unbind = acpi_thermal_unbind_cooling_device,
871 .get_temp = thermal_get_temp,
872 .get_mode = thermal_get_mode,
873 .set_mode = thermal_set_mode,
874 .get_trip_type = thermal_get_trip_type,
875 .get_trip_temp = thermal_get_trip_temp,
876 .get_crit_temp = thermal_get_crit_temp,
877 .get_trend = thermal_get_trend,
878 .notify = thermal_notify,
879};
880
881static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
882{
883 int trips = 0;
884 int result;
885 acpi_status status;
886 int i;
887
888 if (tz->trips.critical.flags.valid)
889 trips++;
890
891 if (tz->trips.hot.flags.valid)
892 trips++;
893
894 if (tz->trips.passive.flags.valid)
895 trips++;
896
897 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
898 tz->trips.active[i].flags.valid; i++, trips++);
899
900 if (tz->trips.passive.flags.valid)
901 tz->thermal_zone =
902 thermal_zone_device_register("acpitz", trips, 0, tz,
903 &acpi_thermal_zone_ops, NULL,
904 tz->trips.passive.tsp*100,
905 tz->polling_frequency*100);
906 else
907 tz->thermal_zone =
908 thermal_zone_device_register("acpitz", trips, 0, tz,
909 &acpi_thermal_zone_ops, NULL,
910 0, tz->polling_frequency*100);
911 if (IS_ERR(tz->thermal_zone))
912 return -ENODEV;
913
914 result = sysfs_create_link(&tz->device->dev.kobj,
915 &tz->thermal_zone->device.kobj, "thermal_zone");
916 if (result)
917 return result;
918
919 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
920 &tz->device->dev.kobj, "device");
921 if (result)
922 return result;
923
924 status = acpi_attach_data(tz->device->handle,
925 acpi_bus_private_data_handler,
926 tz->thermal_zone);
927 if (ACPI_FAILURE(status)) {
928 printk(KERN_ERR PREFIX
929 "Error attaching device data\n");
930 return -ENODEV;
931 }
932
933 tz->tz_enabled = 1;
934
935 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
936 tz->thermal_zone->id);
937 return 0;
938}
939
940static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
941{
942 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
943 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
944 thermal_zone_device_unregister(tz->thermal_zone);
945 tz->thermal_zone = NULL;
946 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
947}
948
949
950
951
952
953
954static void acpi_thermal_notify(struct acpi_device *device, u32 event)
955{
956 struct acpi_thermal *tz = acpi_driver_data(device);
957
958
959 if (!tz)
960 return;
961
962 switch (event) {
963 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
964 acpi_thermal_check(tz);
965 break;
966 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
967 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
968 acpi_thermal_check(tz);
969 acpi_bus_generate_proc_event(device, event, 0);
970 acpi_bus_generate_netlink_event(device->pnp.device_class,
971 dev_name(&device->dev), event, 0);
972 break;
973 case ACPI_THERMAL_NOTIFY_DEVICES:
974 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
975 acpi_thermal_check(tz);
976 acpi_bus_generate_proc_event(device, event, 0);
977 acpi_bus_generate_netlink_event(device->pnp.device_class,
978 dev_name(&device->dev), event, 0);
979 break;
980 default:
981 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
982 "Unsupported event [0x%x]\n", event));
983 break;
984 }
985}
986
987
988
989
990
991
992
993
994
995
996
997
998
999static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
1000{
1001 acpi_handle handle = tz->device->handle;
1002 unsigned long long value;
1003 int i;
1004
1005 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1006 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1007 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1008 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1009 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1010 acpi_status status;
1011
1012 status = acpi_evaluate_integer(handle, name, NULL, &value);
1013 if (status == AE_NOT_FOUND)
1014 break;
1015 }
1016 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1017}
1018
1019static int acpi_thermal_get_info(struct acpi_thermal *tz)
1020{
1021 int result = 0;
1022
1023
1024 if (!tz)
1025 return -EINVAL;
1026
1027 acpi_thermal_aml_dependency_fix(tz);
1028
1029
1030 result = acpi_thermal_get_trip_points(tz);
1031 if (result)
1032 return result;
1033
1034
1035 result = acpi_thermal_get_temperature(tz);
1036 if (result)
1037 return result;
1038
1039
1040 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1041 if (!result)
1042 tz->flags.cooling_mode = 1;
1043
1044
1045 if (tzp)
1046 tz->polling_frequency = tzp;
1047 else
1048 acpi_thermal_get_polling_frequency(tz);
1049
1050 return 0;
1051}
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1064{
1065 if (tz->trips.critical.flags.valid &&
1066 (tz->trips.critical.temperature % 5) == 1)
1067 tz->kelvin_offset = 2731;
1068 else
1069 tz->kelvin_offset = 2732;
1070}
1071
1072static int acpi_thermal_add(struct acpi_device *device)
1073{
1074 int result = 0;
1075 struct acpi_thermal *tz = NULL;
1076
1077
1078 if (!device)
1079 return -EINVAL;
1080
1081 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1082 if (!tz)
1083 return -ENOMEM;
1084
1085 tz->device = device;
1086 strcpy(tz->name, device->pnp.bus_id);
1087 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1088 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1089 device->driver_data = tz;
1090 mutex_init(&tz->lock);
1091
1092
1093 result = acpi_thermal_get_info(tz);
1094 if (result)
1095 goto free_memory;
1096
1097 acpi_thermal_guess_offset(tz);
1098
1099 result = acpi_thermal_register_thermal_zone(tz);
1100 if (result)
1101 goto free_memory;
1102
1103 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1104 acpi_device_name(device), acpi_device_bid(device),
1105 KELVIN_TO_CELSIUS(tz->temperature));
1106 goto end;
1107
1108free_memory:
1109 kfree(tz);
1110end:
1111 return result;
1112}
1113
1114static int acpi_thermal_remove(struct acpi_device *device, int type)
1115{
1116 struct acpi_thermal *tz = NULL;
1117
1118 if (!device || !acpi_driver_data(device))
1119 return -EINVAL;
1120
1121 tz = acpi_driver_data(device);
1122
1123 acpi_thermal_unregister_thermal_zone(tz);
1124 mutex_destroy(&tz->lock);
1125 kfree(tz);
1126 return 0;
1127}
1128
1129#ifdef CONFIG_PM_SLEEP
1130static int acpi_thermal_resume(struct device *dev)
1131{
1132 struct acpi_thermal *tz;
1133 int i, j, power_state, result;
1134
1135 if (!dev)
1136 return -EINVAL;
1137
1138 tz = acpi_driver_data(to_acpi_device(dev));
1139 if (!tz)
1140 return -EINVAL;
1141
1142 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1143 if (!(&tz->trips.active[i]))
1144 break;
1145 if (!tz->trips.active[i].flags.valid)
1146 break;
1147 tz->trips.active[i].flags.enabled = 1;
1148 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1149 result = acpi_bus_update_power(
1150 tz->trips.active[i].devices.handles[j],
1151 &power_state);
1152 if (result || (power_state != ACPI_STATE_D0)) {
1153 tz->trips.active[i].flags.enabled = 0;
1154 break;
1155 }
1156 }
1157 tz->state.active |= tz->trips.active[i].flags.enabled;
1158 }
1159
1160 acpi_thermal_check(tz);
1161
1162 return AE_OK;
1163}
1164#endif
1165
1166static int thermal_act(const struct dmi_system_id *d) {
1167
1168 if (act == 0) {
1169 printk(KERN_NOTICE "ACPI: %s detected: "
1170 "disabling all active thermal trip points\n", d->ident);
1171 act = -1;
1172 }
1173 return 0;
1174}
1175static int thermal_nocrt(const struct dmi_system_id *d) {
1176
1177 printk(KERN_NOTICE "ACPI: %s detected: "
1178 "disabling all critical thermal trip point actions.\n", d->ident);
1179 nocrt = 1;
1180 return 0;
1181}
1182static int thermal_tzp(const struct dmi_system_id *d) {
1183
1184 if (tzp == 0) {
1185 printk(KERN_NOTICE "ACPI: %s detected: "
1186 "enabling thermal zone polling\n", d->ident);
1187 tzp = 300;
1188 }
1189 return 0;
1190}
1191static int thermal_psv(const struct dmi_system_id *d) {
1192
1193 if (psv == 0) {
1194 printk(KERN_NOTICE "ACPI: %s detected: "
1195 "disabling all passive thermal trip points\n", d->ident);
1196 psv = -1;
1197 }
1198 return 0;
1199}
1200
1201static struct dmi_system_id thermal_dmi_table[] __initdata = {
1202
1203
1204
1205
1206 {
1207 .callback = thermal_act,
1208 .ident = "AOpen i915GMm-HFS",
1209 .matches = {
1210 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1211 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1212 },
1213 },
1214 {
1215 .callback = thermal_psv,
1216 .ident = "AOpen i915GMm-HFS",
1217 .matches = {
1218 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1219 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1220 },
1221 },
1222 {
1223 .callback = thermal_tzp,
1224 .ident = "AOpen i915GMm-HFS",
1225 .matches = {
1226 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1227 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1228 },
1229 },
1230 {
1231 .callback = thermal_nocrt,
1232 .ident = "Gigabyte GA-7ZX",
1233 .matches = {
1234 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1235 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1236 },
1237 },
1238 {}
1239};
1240
1241static int __init acpi_thermal_init(void)
1242{
1243 int result = 0;
1244
1245 dmi_check_system(thermal_dmi_table);
1246
1247 if (off) {
1248 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1249 return -ENODEV;
1250 }
1251
1252 result = acpi_bus_register_driver(&acpi_thermal_driver);
1253 if (result < 0)
1254 return -ENODEV;
1255
1256 return 0;
1257}
1258
1259static void __exit acpi_thermal_exit(void)
1260{
1261
1262 acpi_bus_unregister_driver(&acpi_thermal_driver);
1263
1264 return;
1265}
1266
1267module_init(acpi_thermal_init);
1268module_exit(acpi_thermal_exit);
1269
