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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);
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", 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 if (!tz->tz_enabled) {
535 pr_warn("thermal zone is disabled \n");
536 return;
537 }
538 thermal_zone_device_update(tz->thermal_zone);
539}
540
541
542#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
543
544static int thermal_get_temp(struct thermal_zone_device *thermal,
545 unsigned long *temp)
546{
547 struct acpi_thermal *tz = thermal->devdata;
548 int result;
549
550 if (!tz)
551 return -EINVAL;
552
553 result = acpi_thermal_get_temperature(tz);
554 if (result)
555 return result;
556
557 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
558 return 0;
559}
560
561static int thermal_get_mode(struct thermal_zone_device *thermal,
562 enum thermal_device_mode *mode)
563{
564 struct acpi_thermal *tz = thermal->devdata;
565
566 if (!tz)
567 return -EINVAL;
568
569 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
570 THERMAL_DEVICE_DISABLED;
571
572 return 0;
573}
574
575static int thermal_set_mode(struct thermal_zone_device *thermal,
576 enum thermal_device_mode mode)
577{
578 struct acpi_thermal *tz = thermal->devdata;
579 int enable;
580
581 if (!tz)
582 return -EINVAL;
583
584
585
586
587 if (mode == THERMAL_DEVICE_ENABLED)
588 enable = 1;
589 else if (mode == THERMAL_DEVICE_DISABLED)
590 enable = 0;
591 else
592 return -EINVAL;
593
594 if (enable != tz->tz_enabled) {
595 tz->tz_enabled = enable;
596 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
597 "%s kernel ACPI thermal control\n",
598 tz->tz_enabled ? "Enable" : "Disable"));
599 acpi_thermal_check(tz);
600 }
601 return 0;
602}
603
604static int thermal_get_trip_type(struct thermal_zone_device *thermal,
605 int trip, enum thermal_trip_type *type)
606{
607 struct acpi_thermal *tz = thermal->devdata;
608 int i;
609
610 if (!tz || trip < 0)
611 return -EINVAL;
612
613 if (tz->trips.critical.flags.valid) {
614 if (!trip) {
615 *type = THERMAL_TRIP_CRITICAL;
616 return 0;
617 }
618 trip--;
619 }
620
621 if (tz->trips.hot.flags.valid) {
622 if (!trip) {
623 *type = THERMAL_TRIP_HOT;
624 return 0;
625 }
626 trip--;
627 }
628
629 if (tz->trips.passive.flags.valid) {
630 if (!trip) {
631 *type = THERMAL_TRIP_PASSIVE;
632 return 0;
633 }
634 trip--;
635 }
636
637 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
638 tz->trips.active[i].flags.valid; i++) {
639 if (!trip) {
640 *type = THERMAL_TRIP_ACTIVE;
641 return 0;
642 }
643 trip--;
644 }
645
646 return -EINVAL;
647}
648
649static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
650 int trip, unsigned long *temp)
651{
652 struct acpi_thermal *tz = thermal->devdata;
653 int i;
654
655 if (!tz || trip < 0)
656 return -EINVAL;
657
658 if (tz->trips.critical.flags.valid) {
659 if (!trip) {
660 *temp = KELVIN_TO_MILLICELSIUS(
661 tz->trips.critical.temperature,
662 tz->kelvin_offset);
663 return 0;
664 }
665 trip--;
666 }
667
668 if (tz->trips.hot.flags.valid) {
669 if (!trip) {
670 *temp = KELVIN_TO_MILLICELSIUS(
671 tz->trips.hot.temperature,
672 tz->kelvin_offset);
673 return 0;
674 }
675 trip--;
676 }
677
678 if (tz->trips.passive.flags.valid) {
679 if (!trip) {
680 *temp = KELVIN_TO_MILLICELSIUS(
681 tz->trips.passive.temperature,
682 tz->kelvin_offset);
683 return 0;
684 }
685 trip--;
686 }
687
688 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
689 tz->trips.active[i].flags.valid; i++) {
690 if (!trip) {
691 *temp = KELVIN_TO_MILLICELSIUS(
692 tz->trips.active[i].temperature,
693 tz->kelvin_offset);
694 return 0;
695 }
696 trip--;
697 }
698
699 return -EINVAL;
700}
701
702static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
703 unsigned long *temperature) {
704 struct acpi_thermal *tz = thermal->devdata;
705
706 if (tz->trips.critical.flags.valid) {
707 *temperature = KELVIN_TO_MILLICELSIUS(
708 tz->trips.critical.temperature,
709 tz->kelvin_offset);
710 return 0;
711 } else
712 return -EINVAL;
713}
714
715static int thermal_get_trend(struct thermal_zone_device *thermal,
716 int trip, enum thermal_trend *trend)
717{
718 struct acpi_thermal *tz = thermal->devdata;
719 enum thermal_trip_type type;
720 int i;
721
722 if (thermal_get_trip_type(thermal, trip, &type))
723 return -EINVAL;
724
725 if (type == THERMAL_TRIP_ACTIVE) {
726
727 *trend = THERMAL_TREND_RAISING;
728 return 0;
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
