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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 int acpi_thermal_resume(struct acpi_device *device);
102static void acpi_thermal_notify(struct acpi_device *device, u32 event);
103
104static const struct acpi_device_id thermal_device_ids[] = {
105 {ACPI_THERMAL_HID, 0},
106 {"", 0},
107};
108MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
109
110static struct acpi_driver acpi_thermal_driver = {
111 .name = "thermal",
112 .class = ACPI_THERMAL_CLASS,
113 .ids = thermal_device_ids,
114 .ops = {
115 .add = acpi_thermal_add,
116 .remove = acpi_thermal_remove,
117 .resume = acpi_thermal_resume,
118 .notify = acpi_thermal_notify,
119 },
120};
121
122struct acpi_thermal_state {
123 u8 critical:1;
124 u8 hot:1;
125 u8 passive:1;
126 u8 active:1;
127 u8 reserved:4;
128 int active_index;
129};
130
131struct acpi_thermal_state_flags {
132 u8 valid:1;
133 u8 enabled:1;
134 u8 reserved:6;
135};
136
137struct acpi_thermal_critical {
138 struct acpi_thermal_state_flags flags;
139 unsigned long temperature;
140};
141
142struct acpi_thermal_hot {
143 struct acpi_thermal_state_flags flags;
144 unsigned long temperature;
145};
146
147struct acpi_thermal_passive {
148 struct acpi_thermal_state_flags flags;
149 unsigned long temperature;
150 unsigned long tc1;
151 unsigned long tc2;
152 unsigned long tsp;
153 struct acpi_handle_list devices;
154};
155
156struct acpi_thermal_active {
157 struct acpi_thermal_state_flags flags;
158 unsigned long temperature;
159 struct acpi_handle_list devices;
160};
161
162struct acpi_thermal_trips {
163 struct acpi_thermal_critical critical;
164 struct acpi_thermal_hot hot;
165 struct acpi_thermal_passive passive;
166 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
167};
168
169struct acpi_thermal_flags {
170 u8 cooling_mode:1;
171 u8 devices:1;
172 u8 reserved:6;
173};
174
175struct acpi_thermal {
176 struct acpi_device * device;
177 acpi_bus_id name;
178 unsigned long temperature;
179 unsigned long last_temperature;
180 unsigned long polling_frequency;
181 volatile u8 zombie;
182 struct acpi_thermal_flags flags;
183 struct acpi_thermal_state state;
184 struct acpi_thermal_trips trips;
185 struct acpi_handle_list devices;
186 struct thermal_zone_device *thermal_zone;
187 int tz_enabled;
188 int kelvin_offset;
189 struct mutex lock;
190};
191
192
193
194
195
196static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
197{
198 acpi_status status = AE_OK;
199 unsigned long long tmp;
200
201 if (!tz)
202 return -EINVAL;
203
204 tz->last_temperature = tz->temperature;
205
206 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
207 if (ACPI_FAILURE(status))
208 return -ENODEV;
209
210 tz->temperature = tmp;
211 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
212 tz->temperature));
213
214 return 0;
215}
216
217static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
218{
219 acpi_status status = AE_OK;
220 unsigned long long tmp;
221
222 if (!tz)
223 return -EINVAL;
224
225 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
226 if (ACPI_FAILURE(status))
227 return -ENODEV;
228
229 tz->polling_frequency = tmp;
230 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
231 tz->polling_frequency));
232
233 return 0;
234}
235
236static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
237{
238 acpi_status status = AE_OK;
239 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
240 struct acpi_object_list arg_list = { 1, &arg0 };
241 acpi_handle handle = NULL;
242
243
244 if (!tz)
245 return -EINVAL;
246
247 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
248 if (ACPI_FAILURE(status)) {
249 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
250 return -ENODEV;
251 }
252
253 arg0.integer.value = mode;
254
255 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
256 if (ACPI_FAILURE(status))
257 return -ENODEV;
258
259 return 0;
260}
261
262#define ACPI_TRIPS_CRITICAL 0x01
263#define ACPI_TRIPS_HOT 0x02
264#define ACPI_TRIPS_PASSIVE 0x04
265#define ACPI_TRIPS_ACTIVE 0x08
266#define ACPI_TRIPS_DEVICES 0x10
267
268#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
269#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
270
271#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
272 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
273 ACPI_TRIPS_DEVICES)
274
275
276
277
278
279
280
281
282#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
283do { \
284 if (flags != ACPI_TRIPS_INIT) \
285 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
286 "ACPI thermal trip point %s changed\n" \
287 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
288} while (0)
289
290static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
291{
292 acpi_status status = AE_OK;
293 unsigned long long tmp;
294 struct acpi_handle_list devices;
295 int valid = 0;
296 int i;
297
298
299 if (flag & ACPI_TRIPS_CRITICAL) {
300 status = acpi_evaluate_integer(tz->device->handle,
301 "_CRT", NULL, &tmp);
302 tz->trips.critical.temperature = tmp;
303
304
305
306
307
308
309 if (ACPI_FAILURE(status)) {
310 tz->trips.critical.flags.valid = 0;
311 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
312 "No critical threshold\n"));
313 } else if (tmp <= 2732) {
314 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
315 "(%llu)\n", tmp);
316 tz->trips.critical.flags.valid = 0;
317 } else {
318 tz->trips.critical.flags.valid = 1;
319 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
320 "Found critical threshold [%lu]\n",
321 tz->trips.critical.temperature));
322 }
323 if (tz->trips.critical.flags.valid == 1) {
324 if (crt == -1) {
325 tz->trips.critical.flags.valid = 0;
326 } else if (crt > 0) {
327 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
328
329
330
331 if (crt_k > tz->trips.critical.temperature)
332 printk(KERN_WARNING PREFIX
333 "Critical threshold %d C\n", crt);
334 tz->trips.critical.temperature = crt_k;
335 }
336 }
337 }
338
339
340 if (flag & ACPI_TRIPS_HOT) {
341 status = acpi_evaluate_integer(tz->device->handle,
342 "_HOT", NULL, &tmp);
343 if (ACPI_FAILURE(status)) {
344 tz->trips.hot.flags.valid = 0;
345 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
346 "No hot threshold\n"));
347 } else {
348 tz->trips.hot.temperature = tmp;
349 tz->trips.hot.flags.valid = 1;
350 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
351 "Found hot threshold [%lu]\n",
352 tz->trips.critical.temperature));
353 }
354 }
355
356
357 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
358 (flag == ACPI_TRIPS_INIT)) {
359 valid = tz->trips.passive.flags.valid;
360 if (psv == -1) {
361 status = AE_SUPPORT;
362 } else if (psv > 0) {
363 tmp = CELSIUS_TO_KELVIN(psv);
364 status = AE_OK;
365 } else {
366 status = acpi_evaluate_integer(tz->device->handle,
367 "_PSV", NULL, &tmp);
368 }
369
370 if (ACPI_FAILURE(status))
371 tz->trips.passive.flags.valid = 0;
372 else {
373 tz->trips.passive.temperature = tmp;
374 tz->trips.passive.flags.valid = 1;
375 if (flag == ACPI_TRIPS_INIT) {
376 status = acpi_evaluate_integer(
377 tz->device->handle, "_TC1",
378 NULL, &tmp);
379 if (ACPI_FAILURE(status))
380 tz->trips.passive.flags.valid = 0;
381 else
382 tz->trips.passive.tc1 = tmp;
383 status = acpi_evaluate_integer(
384 tz->device->handle, "_TC2",
385 NULL, &tmp);
386 if (ACPI_FAILURE(status))
387 tz->trips.passive.flags.valid = 0;
388 else
389 tz->trips.passive.tc2 = tmp;
390 status = acpi_evaluate_integer(
391 tz->device->handle, "_TSP",
392 NULL, &tmp);
393 if (ACPI_FAILURE(status))
394 tz->trips.passive.flags.valid = 0;
395 else
396 tz->trips.passive.tsp = tmp;
397 }
398 }
399 }
400 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
401 memset(&devices, 0, sizeof(struct acpi_handle_list));
402 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
403 NULL, &devices);
404 if (ACPI_FAILURE(status)) {
405 printk(KERN_WARNING PREFIX
406 "Invalid passive threshold\n");
407 tz->trips.passive.flags.valid = 0;
408 }
409 else
410 tz->trips.passive.flags.valid = 1;
411
412 if (memcmp(&tz->trips.passive.devices, &devices,
413 sizeof(struct acpi_handle_list))) {
414 memcpy(&tz->trips.passive.devices, &devices,
415 sizeof(struct acpi_handle_list));
416 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
417 }
418 }
419 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
420 if (valid != tz->trips.passive.flags.valid)
421 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
422 }
423
424
425 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
426 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
427 valid = tz->trips.active[i].flags.valid;
428
429 if (act == -1)
430 break;
431
432 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
433 tz->trips.active[i].flags.valid)) {
434 status = acpi_evaluate_integer(tz->device->handle,
435 name, NULL, &tmp);
436 if (ACPI_FAILURE(status)) {
437 tz->trips.active[i].flags.valid = 0;
438 if (i == 0)
439 break;
440 if (act <= 0)
441 break;
442 if (i == 1)
443 tz->trips.active[0].temperature =
444 CELSIUS_TO_KELVIN(act);
445 else
446
447
448
449
450 tz->trips.active[i - 1].temperature =
451 (tz->trips.active[i - 2].temperature <
452 CELSIUS_TO_KELVIN(act) ?
453 tz->trips.active[i - 2].temperature :
454 CELSIUS_TO_KELVIN(act));
455 break;
456 } else {
457 tz->trips.active[i].temperature = tmp;
458 tz->trips.active[i].flags.valid = 1;
459 }
460 }
461
462 name[2] = 'L';
463 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
464 memset(&devices, 0, sizeof(struct acpi_handle_list));
465 status = acpi_evaluate_reference(tz->device->handle,
466 name, NULL, &devices);
467 if (ACPI_FAILURE(status)) {
468 printk(KERN_WARNING PREFIX
469 "Invalid active%d threshold\n", i);
470 tz->trips.active[i].flags.valid = 0;
471 }
472 else
473 tz->trips.active[i].flags.valid = 1;
474
475 if (memcmp(&tz->trips.active[i].devices, &devices,
476 sizeof(struct acpi_handle_list))) {
477 memcpy(&tz->trips.active[i].devices, &devices,
478 sizeof(struct acpi_handle_list));
479 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
480 }
481 }
482 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
483 if (valid != tz->trips.active[i].flags.valid)
484 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
485
486 if (!tz->trips.active[i].flags.valid)
487 break;
488 }
489
490 if (flag & ACPI_TRIPS_DEVICES) {
491 memset(&devices, 0, sizeof(struct acpi_handle_list));
492 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
493 NULL, &devices);
494 if (memcmp(&tz->devices, &devices,
495 sizeof(struct acpi_handle_list))) {
496 memcpy(&tz->devices, &devices,
497 sizeof(struct acpi_handle_list));
498 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
499 }
500 }
501
502 return 0;
503}
504
505static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
506{
507 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
508
509 if (ret)
510 return ret;
511
512 valid = tz->trips.critical.flags.valid |
513 tz->trips.hot.flags.valid |
514 tz->trips.passive.flags.valid;
515
516 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
517 valid |= tz->trips.active[i].flags.valid;
518
519 if (!valid) {
520 printk(KERN_WARNING FW_BUG "No valid trip found\n");
521 return -ENODEV;
522 }
523 return 0;
524}
525
526static void acpi_thermal_check(void *data)
527{
528 struct acpi_thermal *tz = data;
529
530 thermal_zone_device_update(tz->thermal_zone);
531}
532
533
534#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
535
536static int thermal_get_temp(struct thermal_zone_device *thermal,
537 unsigned long *temp)
538{
539 struct acpi_thermal *tz = thermal->devdata;
540 int result;
541
542 if (!tz)
543 return -EINVAL;
544
545 result = acpi_thermal_get_temperature(tz);
546 if (result)
547 return result;
548
549 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
550 return 0;
551}
552
553static const char enabled[] = "kernel";
554static const char disabled[] = "user";
555static int thermal_get_mode(struct thermal_zone_device *thermal,
556 enum thermal_device_mode *mode)
557{
558 struct acpi_thermal *tz = thermal->devdata;
559
560 if (!tz)
561 return -EINVAL;
562
563 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
564 THERMAL_DEVICE_DISABLED;
565
566 return 0;
567}
568
569static int thermal_set_mode(struct thermal_zone_device *thermal,
570 enum thermal_device_mode mode)
571{
572 struct acpi_thermal *tz = thermal->devdata;
573 int enable;
574
575 if (!tz)
576 return -EINVAL;
577
578
579
580
581 if (mode == THERMAL_DEVICE_ENABLED)
582 enable = 1;
583 else if (mode == THERMAL_DEVICE_DISABLED)
584 enable = 0;
585 else
586 return -EINVAL;
587
588 if (enable != tz->tz_enabled) {
589 tz->tz_enabled = enable;
590 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
591 "%s ACPI thermal control\n",
592 tz->tz_enabled ? enabled : disabled));
593 acpi_thermal_check(tz);
594 }
595 return 0;
596}
597
598static int thermal_get_trip_type(struct thermal_zone_device *thermal,
599 int trip, enum thermal_trip_type *type)
600{
601 struct acpi_thermal *tz = thermal->devdata;
602 int i;
603
604 if (!tz || trip < 0)
605 return -EINVAL;
606
607 if (tz->trips.critical.flags.valid) {
608 if (!trip) {
609 *type = THERMAL_TRIP_CRITICAL;
610 return 0;
611 }
612 trip--;
613 }
614
615 if (tz->trips.hot.flags.valid) {
616 if (!trip) {
617 *type = THERMAL_TRIP_HOT;
618 return 0;
619 }
620 trip--;
621 }
622
623 if (tz->trips.passive.flags.valid) {
624 if (!trip) {
625 *type = THERMAL_TRIP_PASSIVE;
626 return 0;
627 }
628 trip--;
629 }
630
631 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
632 tz->trips.active[i].flags.valid; i++) {
633 if (!trip) {
634 *type = THERMAL_TRIP_ACTIVE;
635 return 0;
636 }
637 trip--;
638 }
639
640 return -EINVAL;
641}
642
643static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
644 int trip, unsigned long *temp)
645{
646 struct acpi_thermal *tz = thermal->devdata;
647 int i;
648
649 if (!tz || trip < 0)
650 return -EINVAL;
651
652 if (tz->trips.critical.flags.valid) {
653 if (!trip) {
654 *temp = KELVIN_TO_MILLICELSIUS(
655 tz->trips.critical.temperature,
656 tz->kelvin_offset);
657 return 0;
658 }
659 trip--;
660 }
661
662 if (tz->trips.hot.flags.valid) {
663 if (!trip) {
664 *temp = KELVIN_TO_MILLICELSIUS(
665 tz->trips.hot.temperature,
666 tz->kelvin_offset);
667 return 0;
668 }
669 trip--;
670 }
671
672 if (tz->trips.passive.flags.valid) {
673 if (!trip) {
674 *temp = KELVIN_TO_MILLICELSIUS(
675 tz->trips.passive.temperature,
676 tz->kelvin_offset);
677 return 0;
678 }
679 trip--;
680 }
681
682 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
683 tz->trips.active[i].flags.valid; i++) {
684 if (!trip) {
685 *temp = KELVIN_TO_MILLICELSIUS(
686 tz->trips.active[i].temperature,
687 tz->kelvin_offset);
688 return 0;
689 }
690 trip--;
691 }
692
693 return -EINVAL;
694}
695
696static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
697 unsigned long *temperature) {
698 struct acpi_thermal *tz = thermal->devdata;
699
700 if (tz->trips.critical.flags.valid) {
701 *temperature = KELVIN_TO_MILLICELSIUS(
702 tz->trips.critical.temperature,
703 tz->kelvin_offset);
704 return 0;
705 } else
706 return -EINVAL;
707}
708
709static int thermal_notify(struct thermal_zone_device *thermal, int trip,
710 enum thermal_trip_type trip_type)
711{
712 u8 type = 0;
713 struct acpi_thermal *tz = thermal->devdata;
714
715 if (trip_type == THERMAL_TRIP_CRITICAL)
716 type = ACPI_THERMAL_NOTIFY_CRITICAL;
717 else if (trip_type == THERMAL_TRIP_HOT)
718 type = ACPI_THERMAL_NOTIFY_HOT;
719 else
720 return 0;
721
722 acpi_bus_generate_proc_event(tz->device, type, 1);
723 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
724 dev_name(&tz->device->dev), type, 1);
725
726 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
727 return 1;
728
729 return 0;
730}
731
732typedef int (*cb)(struct thermal_zone_device *, int,
733 struct thermal_cooling_device *);
734static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
735 struct thermal_cooling_device *cdev,
736 cb action)
737{
738 struct acpi_device *device = cdev->devdata;
739 struct acpi_thermal *tz = thermal->devdata;
740 struct acpi_device *dev;
741 acpi_status status;
742 acpi_handle handle;
743 int i;
744 int j;
745 int trip = -1;
746 int result = 0;
747
748 if (tz->trips.critical.flags.valid)
749 trip++;
750
751 if (tz->trips.hot.flags.valid)
752 trip++;
753
754 if (tz->trips.passive.flags.valid) {
755 trip++;
756 for (i = 0; i < tz->trips.passive.devices.count;
757 i++) {
758 handle = tz->trips.passive.devices.handles[i];
759 status = acpi_bus_get_device(handle, &dev);
760 if (ACPI_SUCCESS(status) && (dev == device)) {
761 result = action(thermal, trip, cdev);
762 if (result)
763 goto failed;
764 }
765 }
766 }
767
768 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
769 if (!tz->trips.active[i].flags.valid)
770 break;
771 trip++;
772 for (j = 0;
773 j < tz->trips.active[i].devices.count;
774 j++) {
775 handle = tz->trips.active[i].devices.handles[j];
776 status = acpi_bus_get_device(handle, &dev);
777 if (ACPI_SUCCESS(status) && (dev == device)) {
778 result = action(thermal, trip, cdev);
779 if (result)
780 goto failed;
781 }
782 }
783 }
784
785 for (i = 0; i < tz->devices.count; i++) {
786 handle = tz->devices.handles[i];
787 status = acpi_bus_get_device(handle, &dev);
788 if (ACPI_SUCCESS(status) && (dev == device)) {
789 result = action(thermal, -1, cdev);
790 if (result)
791 goto failed;
792 }
793 }
794
795failed:
796 return result;
797}
798
799static int
800acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
801 struct thermal_cooling_device *cdev)
802{
803 return acpi_thermal_cooling_device_cb(thermal, cdev,
804 thermal_zone_bind_cooling_device);
805}
806
807static int
808acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
809 struct thermal_cooling_device *cdev)
810{
811 return acpi_thermal_cooling_device_cb(thermal, cdev,
812 thermal_zone_unbind_cooling_device);
813}
814
815static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
816 .bind = acpi_thermal_bind_cooling_device,
817 .unbind = acpi_thermal_unbind_cooling_device,
818 .get_temp = thermal_get_temp,
819 .get_mode = thermal_get_mode,
820 .set_mode = thermal_set_mode,
821 .get_trip_type = thermal_get_trip_type,
822 .get_trip_temp = thermal_get_trip_temp,
823 .get_crit_temp = thermal_get_crit_temp,
824 .notify = thermal_notify,
825};
826
827static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
828{
829 int trips = 0;
830 int result;
831 acpi_status status;
832 int i;
833
834 if (tz->trips.critical.flags.valid)
835 trips++;
836
837 if (tz->trips.hot.flags.valid)
838 trips++;
839
840 if (tz->trips.passive.flags.valid)
841 trips++;
842
843 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
844 tz->trips.active[i].flags.valid; i++, trips++);
845
846 if (tz->trips.passive.flags.valid)
847 tz->thermal_zone =
848 thermal_zone_device_register("acpitz", trips, tz,
849 &acpi_thermal_zone_ops,
850 tz->trips.passive.tc1,
851 tz->trips.passive.tc2,
852 tz->trips.passive.tsp*100,
853 tz->polling_frequency*100);
854 else
855 tz->thermal_zone =
856 thermal_zone_device_register("acpitz", trips, tz,
857 &acpi_thermal_zone_ops,
858 0, 0, 0,
859 tz->polling_frequency*100);
860 if (IS_ERR(tz->thermal_zone))
861 return -ENODEV;
862
863 result = sysfs_create_link(&tz->device->dev.kobj,
864 &tz->thermal_zone->device.kobj, "thermal_zone");
865 if (result)
866 return result;
867
868 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
869 &tz->device->dev.kobj, "device");
870 if (result)
871 return result;
872
873 status = acpi_attach_data(tz->device->handle,
874 acpi_bus_private_data_handler,
875 tz->thermal_zone);
876 if (ACPI_FAILURE(status)) {
877 printk(KERN_ERR PREFIX
878 "Error attaching device data\n");
879 return -ENODEV;
880 }
881
882 tz->tz_enabled = 1;
883
884 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
885 tz->thermal_zone->id);
886 return 0;
887}
888
889static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
890{
891 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
892 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
893 thermal_zone_device_unregister(tz->thermal_zone);
894 tz->thermal_zone = NULL;
895 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
896}
897
898
899
900
901
902
903static void acpi_thermal_notify(struct acpi_device *device, u32 event)
904{
905 struct acpi_thermal *tz = acpi_driver_data(device);
906
907
908 if (!tz)
909 return;
910
911 switch (event) {
912 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
913 acpi_thermal_check(tz);
914 break;
915 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
916 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
917 acpi_thermal_check(tz);
918 acpi_bus_generate_proc_event(device, event, 0);
919 acpi_bus_generate_netlink_event(device->pnp.device_class,
920 dev_name(&device->dev), event, 0);
921 break;
922 case ACPI_THERMAL_NOTIFY_DEVICES:
923 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
924 acpi_thermal_check(tz);
925 acpi_bus_generate_proc_event(device, event, 0);
926 acpi_bus_generate_netlink_event(device->pnp.device_class,
927 dev_name(&device->dev), event, 0);
928 break;
929 default:
930 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
931 "Unsupported event [0x%x]\n", event));
932 break;
933 }
934}
935
936static int acpi_thermal_get_info(struct acpi_thermal *tz)
937{
938 int result = 0;
939
940
941 if (!tz)
942 return -EINVAL;
943
944
945 result = acpi_thermal_get_trip_points(tz);
946 if (result)
947 return result;
948
949
950 result = acpi_thermal_get_temperature(tz);
951 if (result)
952 return result;
953
954
955 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
956 if (!result)
957 tz->flags.cooling_mode = 1;
958
959
960 if (tzp)
961 tz->polling_frequency = tzp;
962 else
963 acpi_thermal_get_polling_frequency(tz);
964
965 return 0;
966}
967
968
969
970
971
972
973
974
975
976
977
978static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
979{
980 if (tz->trips.critical.flags.valid &&
981 (tz->trips.critical.temperature % 5) == 1)
982 tz->kelvin_offset = 2731;
983 else
984 tz->kelvin_offset = 2732;
985}
986
987static int acpi_thermal_add(struct acpi_device *device)
988{
989 int result = 0;
990 struct acpi_thermal *tz = NULL;
991
992
993 if (!device)
994 return -EINVAL;
995
996 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
997 if (!tz)
998 return -ENOMEM;
999
1000 tz->device = device;
1001 strcpy(tz->name, device->pnp.bus_id);
1002 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1003 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1004 device->driver_data = tz;
1005 mutex_init(&tz->lock);
1006
1007
1008 result = acpi_thermal_get_info(tz);
1009 if (result)
1010 goto free_memory;
1011
1012 acpi_thermal_guess_offset(tz);
1013
1014 result = acpi_thermal_register_thermal_zone(tz);
1015 if (result)
1016 goto free_memory;
1017
1018 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1019 acpi_device_name(device), acpi_device_bid(device),
1020 KELVIN_TO_CELSIUS(tz->temperature));
1021 goto end;
1022
1023free_memory:
1024 kfree(tz);
1025end:
1026 return result;
1027}
1028
1029static int acpi_thermal_remove(struct acpi_device *device, int type)
1030{
1031 struct acpi_thermal *tz = NULL;
1032
1033 if (!device || !acpi_driver_data(device))
1034 return -EINVAL;
1035
1036 tz = acpi_driver_data(device);
1037
1038 acpi_thermal_unregister_thermal_zone(tz);
1039 mutex_destroy(&tz->lock);
1040 kfree(tz);
1041 return 0;
1042}
1043
1044static int acpi_thermal_resume(struct acpi_device *device)
1045{
1046 struct acpi_thermal *tz = NULL;
1047 int i, j, power_state, result;
1048
1049
1050 if (!device || !acpi_driver_data(device))
1051 return -EINVAL;
1052
1053 tz = acpi_driver_data(device);
1054
1055 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1056 if (!(&tz->trips.active[i]))
1057 break;
1058 if (!tz->trips.active[i].flags.valid)
1059 break;
1060 tz->trips.active[i].flags.enabled = 1;
1061 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1062 result = acpi_bus_update_power(
1063 tz->trips.active[i].devices.handles[j],
1064 &power_state);
1065 if (result || (power_state != ACPI_STATE_D0)) {
1066 tz->trips.active[i].flags.enabled = 0;
1067 break;
1068 }
1069 }
1070 tz->state.active |= tz->trips.active[i].flags.enabled;
1071 }
1072
1073 acpi_thermal_check(tz);
1074
1075 return AE_OK;
1076}
1077
1078static int thermal_act(const struct dmi_system_id *d) {
1079
1080 if (act == 0) {
1081 printk(KERN_NOTICE "ACPI: %s detected: "
1082 "disabling all active thermal trip points\n", d->ident);
1083 act = -1;
1084 }
1085 return 0;
1086}
1087static int thermal_nocrt(const struct dmi_system_id *d) {
1088
1089 printk(KERN_NOTICE "ACPI: %s detected: "
1090 "disabling all critical thermal trip point actions.\n", d->ident);
1091 nocrt = 1;
1092 return 0;
1093}
1094static int thermal_tzp(const struct dmi_system_id *d) {
1095
1096 if (tzp == 0) {
1097 printk(KERN_NOTICE "ACPI: %s detected: "
1098 "enabling thermal zone polling\n", d->ident);
1099 tzp = 300;
1100 }
1101 return 0;
1102}
1103static int thermal_psv(const struct dmi_system_id *d) {
1104
1105 if (psv == 0) {
1106 printk(KERN_NOTICE "ACPI: %s detected: "
1107 "disabling all passive thermal trip points\n", d->ident);
1108 psv = -1;
1109 }
1110 return 0;
1111}
1112
1113static struct dmi_system_id thermal_dmi_table[] __initdata = {
1114
1115
1116
1117
1118 {
1119 .callback = thermal_act,
1120 .ident = "AOpen i915GMm-HFS",
1121 .matches = {
1122 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1123 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1124 },
1125 },
1126 {
1127 .callback = thermal_psv,
1128 .ident = "AOpen i915GMm-HFS",
1129 .matches = {
1130 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1131 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1132 },
1133 },
1134 {
1135 .callback = thermal_tzp,
1136 .ident = "AOpen i915GMm-HFS",
1137 .matches = {
1138 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1139 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1140 },
1141 },
1142 {
1143 .callback = thermal_nocrt,
1144 .ident = "Gigabyte GA-7ZX",
1145 .matches = {
1146 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1147 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1148 },
1149 },
1150 {}
1151};
1152
1153static int __init acpi_thermal_init(void)
1154{
1155 int result = 0;
1156
1157 dmi_check_system(thermal_dmi_table);
1158
1159 if (off) {
1160 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1161 return -ENODEV;
1162 }
1163
1164 result = acpi_bus_register_driver(&acpi_thermal_driver);
1165 if (result < 0)
1166 return -ENODEV;
1167
1168 return 0;
1169}
1170
1171static void __exit acpi_thermal_exit(void)
1172{
1173
1174 acpi_bus_unregister_driver(&acpi_thermal_driver);
1175
1176 return;
1177}
1178
1179module_init(acpi_thermal_init);
1180module_exit(acpi_thermal_exit);
1181
