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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / acpi / thermal.c
blob65f67815902a2d18c0f1df09e48210af86002568
1 /*
2 * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 *
25 * This driver fully implements the ACPI thermal policy as described in the
26 * ACPI 2.0 Specification.
27 *
28 * TBD: 1. Implement passive cooling hysteresis.
29 * 2. Enhance passive cooling (CPU) states/limit interface to support
30 * concepts of 'multiple limiters', upper/lower limits, etc.
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/types.h>
39 #include <linux/proc_fs.h>
40 #include <linux/jiffies.h>
41 #include <linux/kmod.h>
42 #include <linux/seq_file.h>
43 #include <linux/reboot.h>
44 #include <linux/device.h>
45 #include <asm/uaccess.h>
46 #include <linux/thermal.h>
47 #include <acpi/acpi_bus.h>
48 #include <acpi/acpi_drivers.h>
49
50 #define PREFIX "ACPI: "
51
52 #define ACPI_THERMAL_CLASS "thermal_zone"
53 #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
54 #define ACPI_THERMAL_FILE_STATE "state"
55 #define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
56 #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
57 #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
58 #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
59 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
60 #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
61 #define ACPI_THERMAL_NOTIFY_DEVICES 0x82
62 #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
63 #define ACPI_THERMAL_NOTIFY_HOT 0xF1
64 #define ACPI_THERMAL_MODE_ACTIVE 0x00
65
66 #define ACPI_THERMAL_MAX_ACTIVE 10
67 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
68
69 #define _COMPONENT ACPI_THERMAL_COMPONENT
70 ACPI_MODULE_NAME("thermal");
71
72 MODULE_AUTHOR("Paul Diefenbaugh");
73 MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
74 MODULE_LICENSE("GPL");
75
76 static int act;
77 module_param(act, int, 0644);
78 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
79
80 static int crt;
81 module_param(crt, int, 0644);
82 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
83
84 static int tzp;
85 module_param(tzp, int, 0444);
86 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
87
88 static int nocrt;
89 module_param(nocrt, int, 0);
90 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
91
92 static int off;
93 module_param(off, int, 0);
94 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
95
96 static int psv;
97 module_param(psv, int, 0644);
98 MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
99
100 static int acpi_thermal_add(struct acpi_device *device);
101 static int acpi_thermal_remove(struct acpi_device *device, int type);
102 static int acpi_thermal_resume(struct acpi_device *device);
103 static void acpi_thermal_notify(struct acpi_device *device, u32 event);
104 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
105 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
106 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
107 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
108 static ssize_t acpi_thermal_write_cooling_mode(struct file *,
109 const char __user *, size_t,
110 loff_t *);
111 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
112 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
113 size_t, loff_t *);
114
115 static const struct acpi_device_id thermal_device_ids[] = {
116 {ACPI_THERMAL_HID, 0},
117 {"", 0},
118 };
119 MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
120
121 static struct acpi_driver acpi_thermal_driver = {
122 .name = "thermal",
123 .class = ACPI_THERMAL_CLASS,
124 .ids = thermal_device_ids,
125 .ops = {
126 .add = acpi_thermal_add,
127 .remove = acpi_thermal_remove,
128 .resume = acpi_thermal_resume,
129 .notify = acpi_thermal_notify,
130 },
131 };
132
133 struct acpi_thermal_state {
134 u8 critical:1;
135 u8 hot:1;
136 u8 passive:1;
137 u8 active:1;
138 u8 reserved:4;
139 int active_index;
140 };
141
142 struct acpi_thermal_state_flags {
143 u8 valid:1;
144 u8 enabled:1;
145 u8 reserved:6;
146 };
147
148 struct acpi_thermal_critical {
149 struct acpi_thermal_state_flags flags;
150 unsigned long temperature;
151 };
152
153 struct acpi_thermal_hot {
154 struct acpi_thermal_state_flags flags;
155 unsigned long temperature;
156 };
157
158 struct acpi_thermal_passive {
159 struct acpi_thermal_state_flags flags;
160 unsigned long temperature;
161 unsigned long tc1;
162 unsigned long tc2;
163 unsigned long tsp;
164 struct acpi_handle_list devices;
165 };
166
167 struct acpi_thermal_active {
168 struct acpi_thermal_state_flags flags;
169 unsigned long temperature;
170 struct acpi_handle_list devices;
171 };
172
173 struct acpi_thermal_trips {
174 struct acpi_thermal_critical critical;
175 struct acpi_thermal_hot hot;
176 struct acpi_thermal_passive passive;
177 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
178 };
179
180 struct acpi_thermal_flags {
181 u8 cooling_mode:1; /* _SCP */
182 u8 devices:1; /* _TZD */
183 u8 reserved:6;
184 };
185
186 struct acpi_thermal {
187 struct acpi_device * device;
188 acpi_bus_id name;
189 unsigned long temperature;
190 unsigned long last_temperature;
191 unsigned long polling_frequency;
192 volatile u8 zombie;
193 struct acpi_thermal_flags flags;
194 struct acpi_thermal_state state;
195 struct acpi_thermal_trips trips;
196 struct acpi_handle_list devices;
197 struct thermal_zone_device *thermal_zone;
198 int tz_enabled;
199 int kelvin_offset;
200 struct mutex lock;
201 };
202
203 static const struct file_operations acpi_thermal_state_fops = {
204 .owner = THIS_MODULE,
205 .open = acpi_thermal_state_open_fs,
206 .read = seq_read,
207 .llseek = seq_lseek,
208 .release = single_release,
209 };
210
211 static const struct file_operations acpi_thermal_temp_fops = {
212 .owner = THIS_MODULE,
213 .open = acpi_thermal_temp_open_fs,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217 };
218
219 static const struct file_operations acpi_thermal_trip_fops = {
220 .owner = THIS_MODULE,
221 .open = acpi_thermal_trip_open_fs,
222 .read = seq_read,
223 .llseek = seq_lseek,
224 .release = single_release,
225 };
226
227 static const struct file_operations acpi_thermal_cooling_fops = {
228 .owner = THIS_MODULE,
229 .open = acpi_thermal_cooling_open_fs,
230 .read = seq_read,
231 .write = acpi_thermal_write_cooling_mode,
232 .llseek = seq_lseek,
233 .release = single_release,
234 };
235
236 static const struct file_operations acpi_thermal_polling_fops = {
237 .owner = THIS_MODULE,
238 .open = acpi_thermal_polling_open_fs,
239 .read = seq_read,
240 .write = acpi_thermal_write_polling,
241 .llseek = seq_lseek,
242 .release = single_release,
243 };
244
245 /* --------------------------------------------------------------------------
246 Thermal Zone Management
247 -------------------------------------------------------------------------- */
248
249 static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
250 {
251 acpi_status status = AE_OK;
252 unsigned long long tmp;
253
254 if (!tz)
255 return -EINVAL;
256
257 tz->last_temperature = tz->temperature;
258
259 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
260 if (ACPI_FAILURE(status))
261 return -ENODEV;
262
263 tz->temperature = tmp;
264 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
265 tz->temperature));
266
267 return 0;
268 }
269
270 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
271 {
272 acpi_status status = AE_OK;
273 unsigned long long tmp;
274
275 if (!tz)
276 return -EINVAL;
277
278 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
279 if (ACPI_FAILURE(status))
280 return -ENODEV;
281
282 tz->polling_frequency = tmp;
283 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
284 tz->polling_frequency));
285
286 return 0;
287 }
288
289 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
290 {
291
292 if (!tz)
293 return -EINVAL;
294
295 tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
296
297 tz->thermal_zone->polling_delay = seconds * 1000;
298
299 if (tz->tz_enabled)
300 thermal_zone_device_update(tz->thermal_zone);
301
302 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
303 "Polling frequency set to %lu seconds\n",
304 tz->polling_frequency/10));
305
306 return 0;
307 }
308
309 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
310 {
311 acpi_status status = AE_OK;
312 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
313 struct acpi_object_list arg_list = { 1, &arg0 };
314 acpi_handle handle = NULL;
315
316
317 if (!tz)
318 return -EINVAL;
319
320 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
321 if (ACPI_FAILURE(status)) {
322 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
323 return -ENODEV;
324 }
325
326 arg0.integer.value = mode;
327
328 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
329 if (ACPI_FAILURE(status))
330 return -ENODEV;
331
332 return 0;
333 }
334
335 #define ACPI_TRIPS_CRITICAL 0x01
336 #define ACPI_TRIPS_HOT 0x02
337 #define ACPI_TRIPS_PASSIVE 0x04
338 #define ACPI_TRIPS_ACTIVE 0x08
339 #define ACPI_TRIPS_DEVICES 0x10
340
341 #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
342 #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
343
344 #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
345 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
346 ACPI_TRIPS_DEVICES)
347
348 /*
349 * This exception is thrown out in two cases:
350 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
351 * when re-evaluating the AML code.
352 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
353 * We need to re-bind the cooling devices of a thermal zone when this occurs.
354 */
355 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
356 do { \
357 if (flags != ACPI_TRIPS_INIT) \
358 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
359 "ACPI thermal trip point %s changed\n" \
360 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
361 } while (0)
362
363 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
364 {
365 acpi_status status = AE_OK;
366 unsigned long long tmp;
367 struct acpi_handle_list devices;
368 int valid = 0;
369 int i;
370
371 /* Critical Shutdown (required) */
372 if (flag & ACPI_TRIPS_CRITICAL) {
373 status = acpi_evaluate_integer(tz->device->handle,
374 "_CRT", NULL, &tmp);
375 tz->trips.critical.temperature = tmp;
376 /*
377 * Treat freezing temperatures as invalid as well; some
378 * BIOSes return really low values and cause reboots at startup.
379 * Below zero (Celsius) values clearly aren't right for sure..
380 * ... so lets discard those as invalid.
381 */
382 if (ACPI_FAILURE(status) ||
383 tz->trips.critical.temperature <= 2732) {
384 tz->trips.critical.flags.valid = 0;
385 ACPI_EXCEPTION((AE_INFO, status,
386 "No or invalid critical threshold"));
387 return -ENODEV;
388 } else {
389 tz->trips.critical.flags.valid = 1;
390 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
391 "Found critical threshold [%lu]\n",
392 tz->trips.critical.temperature));
393 }
394 if (tz->trips.critical.flags.valid == 1) {
395 if (crt == -1) {
396 tz->trips.critical.flags.valid = 0;
397 } else if (crt > 0) {
398 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
399 /*
400 * Allow override critical threshold
401 */
402 if (crt_k > tz->trips.critical.temperature)
403 printk(KERN_WARNING PREFIX
404 "Critical threshold %d C\n", crt);
405 tz->trips.critical.temperature = crt_k;
406 }
407 }
408 }
409
410 /* Critical Sleep (optional) */
411 if (flag & ACPI_TRIPS_HOT) {
412 status = acpi_evaluate_integer(tz->device->handle,
413 "_HOT", NULL, &tmp);
414 if (ACPI_FAILURE(status)) {
415 tz->trips.hot.flags.valid = 0;
416 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
417 "No hot threshold\n"));
418 } else {
419 tz->trips.hot.temperature = tmp;
420 tz->trips.hot.flags.valid = 1;
421 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
422 "Found hot threshold [%lu]\n",
423 tz->trips.critical.temperature));
424 }
425 }
426
427 /* Passive (optional) */
428 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
429 (flag == ACPI_TRIPS_INIT)) {
430 valid = tz->trips.passive.flags.valid;
431 if (psv == -1) {
432 status = AE_SUPPORT;
433 } else if (psv > 0) {
434 tmp = CELSIUS_TO_KELVIN(psv);
435 status = AE_OK;
436 } else {
437 status = acpi_evaluate_integer(tz->device->handle,
438 "_PSV", NULL, &tmp);
439 }
440
441 if (ACPI_FAILURE(status))
442 tz->trips.passive.flags.valid = 0;
443 else {
444 tz->trips.passive.temperature = tmp;
445 tz->trips.passive.flags.valid = 1;
446 if (flag == ACPI_TRIPS_INIT) {
447 status = acpi_evaluate_integer(
448 tz->device->handle, "_TC1",
449 NULL, &tmp);
450 if (ACPI_FAILURE(status))
451 tz->trips.passive.flags.valid = 0;
452 else
453 tz->trips.passive.tc1 = tmp;
454 status = acpi_evaluate_integer(
455 tz->device->handle, "_TC2",
456 NULL, &tmp);
457 if (ACPI_FAILURE(status))
458 tz->trips.passive.flags.valid = 0;
459 else
460 tz->trips.passive.tc2 = tmp;
461 status = acpi_evaluate_integer(
462 tz->device->handle, "_TSP",
463 NULL, &tmp);
464 if (ACPI_FAILURE(status))
465 tz->trips.passive.flags.valid = 0;
466 else
467 tz->trips.passive.tsp = tmp;
468 }
469 }
470 }
471 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
472 memset(&devices, 0, sizeof(struct acpi_handle_list));
473 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
474 NULL, &devices);
475 if (ACPI_FAILURE(status)) {
476 printk(KERN_WARNING PREFIX
477 "Invalid passive threshold\n");
478 tz->trips.passive.flags.valid = 0;
479 }
480 else
481 tz->trips.passive.flags.valid = 1;
482
483 if (memcmp(&tz->trips.passive.devices, &devices,
484 sizeof(struct acpi_handle_list))) {
485 memcpy(&tz->trips.passive.devices, &devices,
486 sizeof(struct acpi_handle_list));
487 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
488 }
489 }
490 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
491 if (valid != tz->trips.passive.flags.valid)
492 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
493 }
494
495 /* Active (optional) */
496 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
497 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
498 valid = tz->trips.active[i].flags.valid;
499
500 if (act == -1)
501 break; /* disable all active trip points */
502
503 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
504 tz->trips.active[i].flags.valid)) {
505 status = acpi_evaluate_integer(tz->device->handle,
506 name, NULL, &tmp);
507 if (ACPI_FAILURE(status)) {
508 tz->trips.active[i].flags.valid = 0;
509 if (i == 0)
510 break;
511 if (act <= 0)
512 break;
513 if (i == 1)
514 tz->trips.active[0].temperature =
515 CELSIUS_TO_KELVIN(act);
516 else
517 /*
518 * Don't allow override higher than
519 * the next higher trip point
520 */
521 tz->trips.active[i - 1].temperature =
522 (tz->trips.active[i - 2].temperature <
523 CELSIUS_TO_KELVIN(act) ?
524 tz->trips.active[i - 2].temperature :
525 CELSIUS_TO_KELVIN(act));
526 break;
527 } else {
528 tz->trips.active[i].temperature = tmp;
529 tz->trips.active[i].flags.valid = 1;
530 }
531 }
532
533 name[2] = 'L';
534 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
535 memset(&devices, 0, sizeof(struct acpi_handle_list));
536 status = acpi_evaluate_reference(tz->device->handle,
537 name, NULL, &devices);
538 if (ACPI_FAILURE(status)) {
539 printk(KERN_WARNING PREFIX
540 "Invalid active%d threshold\n", i);
541 tz->trips.active[i].flags.valid = 0;
542 }
543 else
544 tz->trips.active[i].flags.valid = 1;
545
546 if (memcmp(&tz->trips.active[i].devices, &devices,
547 sizeof(struct acpi_handle_list))) {
548 memcpy(&tz->trips.active[i].devices, &devices,
549 sizeof(struct acpi_handle_list));
550 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
551 }
552 }
553 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
554 if (valid != tz->trips.active[i].flags.valid)
555 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
556
557 if (!tz->trips.active[i].flags.valid)
558 break;
559 }
560
561 if (flag & ACPI_TRIPS_DEVICES) {
562 memset(&devices, 0, sizeof(struct acpi_handle_list));
563 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
564 NULL, &devices);
565 if (memcmp(&tz->devices, &devices,
566 sizeof(struct acpi_handle_list))) {
567 memcpy(&tz->devices, &devices,
568 sizeof(struct acpi_handle_list));
569 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
570 }
571 }
572
573 return 0;
574 }
575
576 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
577 {
578 return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
579 }
580
581 static void acpi_thermal_check(void *data)
582 {
583 struct acpi_thermal *tz = data;
584
585 thermal_zone_device_update(tz->thermal_zone);
586 }
587
588 /* sys I/F for generic thermal sysfs support */
589 #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
590
591 static int thermal_get_temp(struct thermal_zone_device *thermal,
592 unsigned long *temp)
593 {
594 struct acpi_thermal *tz = thermal->devdata;
595 int result;
596
597 if (!tz)
598 return -EINVAL;
599
600 result = acpi_thermal_get_temperature(tz);
601 if (result)
602 return result;
603
604 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
605 return 0;
606 }
607
608 static const char enabled[] = "kernel";
609 static const char disabled[] = "user";
610 static int thermal_get_mode(struct thermal_zone_device *thermal,
611 enum thermal_device_mode *mode)
612 {
613 struct acpi_thermal *tz = thermal->devdata;
614
615 if (!tz)
616 return -EINVAL;
617
618 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
619 THERMAL_DEVICE_DISABLED;
620
621 return 0;
622 }
623
624 static int thermal_set_mode(struct thermal_zone_device *thermal,
625 enum thermal_device_mode mode)
626 {
627 struct acpi_thermal *tz = thermal->devdata;
628 int enable;
629
630 if (!tz)
631 return -EINVAL;
632
633 /*
634 * enable/disable thermal management from ACPI thermal driver
635 */
636 if (mode == THERMAL_DEVICE_ENABLED)
637 enable = 1;
638 else if (mode == THERMAL_DEVICE_DISABLED)
639 enable = 0;
640 else
641 return -EINVAL;
642
643 if (enable != tz->tz_enabled) {
644 tz->tz_enabled = enable;
645 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
646 "%s ACPI thermal control\n",
647 tz->tz_enabled ? enabled : disabled));
648 acpi_thermal_check(tz);
649 }
650 return 0;
651 }
652
653 static int thermal_get_trip_type(struct thermal_zone_device *thermal,
654 int trip, enum thermal_trip_type *type)
655 {
656 struct acpi_thermal *tz = thermal->devdata;
657 int i;
658
659 if (!tz || trip < 0)
660 return -EINVAL;
661
662 if (tz->trips.critical.flags.valid) {
663 if (!trip) {
664 *type = THERMAL_TRIP_CRITICAL;
665 return 0;
666 }
667 trip--;
668 }
669
670 if (tz->trips.hot.flags.valid) {
671 if (!trip) {
672 *type = THERMAL_TRIP_HOT;
673 return 0;
674 }
675 trip--;
676 }
677
678 if (tz->trips.passive.flags.valid) {
679 if (!trip) {
680 *type = THERMAL_TRIP_PASSIVE;
681 return 0;
682 }
683 trip--;
684 }
685
686 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
687 tz->trips.active[i].flags.valid; i++) {
688 if (!trip) {
689 *type = THERMAL_TRIP_ACTIVE;
690 return 0;
691 }
692 trip--;
693 }
694
695 return -EINVAL;
696 }
697
698 static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
699 int trip, unsigned long *temp)
700 {
701 struct acpi_thermal *tz = thermal->devdata;
702 int i;
703
704 if (!tz || trip < 0)
705 return -EINVAL;
706
707 if (tz->trips.critical.flags.valid) {
708 if (!trip) {
709 *temp = KELVIN_TO_MILLICELSIUS(
710 tz->trips.critical.temperature,
711 tz->kelvin_offset);
712 return 0;
713 }
714 trip--;
715 }
716
717 if (tz->trips.hot.flags.valid) {
718 if (!trip) {
719 *temp = KELVIN_TO_MILLICELSIUS(
720 tz->trips.hot.temperature,
721 tz->kelvin_offset);
722 return 0;
723 }
724 trip--;
725 }
726
727 if (tz->trips.passive.flags.valid) {
728 if (!trip) {
729 *temp = KELVIN_TO_MILLICELSIUS(
730 tz->trips.passive.temperature,
731 tz->kelvin_offset);
732 return 0;
733 }
734 trip--;
735 }
736
737 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
738 tz->trips.active[i].flags.valid; i++) {
739 if (!trip) {
740 *temp = KELVIN_TO_MILLICELSIUS(
741 tz->trips.active[i].temperature,
742 tz->kelvin_offset);
743 return 0;
744 }
745 trip--;
746 }
747
748 return -EINVAL;
749 }
750
751 static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
752 unsigned long *temperature) {
753 struct acpi_thermal *tz = thermal->devdata;
754
755 if (tz->trips.critical.flags.valid) {
756 *temperature = KELVIN_TO_MILLICELSIUS(
757 tz->trips.critical.temperature,
758 tz->kelvin_offset);
759 return 0;
760 } else
761 return -EINVAL;
762 }
763
764 static int thermal_notify(struct thermal_zone_device *thermal, int trip,
765 enum thermal_trip_type trip_type)
766 {
767 u8 type = 0;
768 struct acpi_thermal *tz = thermal->devdata;
769
770 if (trip_type == THERMAL_TRIP_CRITICAL)
771 type = ACPI_THERMAL_NOTIFY_CRITICAL;
772 else if (trip_type == THERMAL_TRIP_HOT)
773 type = ACPI_THERMAL_NOTIFY_HOT;
774 else
775 return 0;
776
777 acpi_bus_generate_proc_event(tz->device, type, 1);
778 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
779 dev_name(&tz->device->dev), type, 1);
780
781 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
782 return 1;
783
784 return 0;
785 }
786
787 typedef int (*cb)(struct thermal_zone_device *, int,
788 struct thermal_cooling_device *);
789 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
790 struct thermal_cooling_device *cdev,
791 cb action)
792 {
793 struct acpi_device *device = cdev->devdata;
794 struct acpi_thermal *tz = thermal->devdata;
795 struct acpi_device *dev;
796 acpi_status status;
797 acpi_handle handle;
798 int i;
799 int j;
800 int trip = -1;
801 int result = 0;
802
803 if (tz->trips.critical.flags.valid)
804 trip++;
805
806 if (tz->trips.hot.flags.valid)
807 trip++;
808
809 if (tz->trips.passive.flags.valid) {
810 trip++;
811 for (i = 0; i < tz->trips.passive.devices.count;
812 i++) {
813 handle = tz->trips.passive.devices.handles[i];
814 status = acpi_bus_get_device(handle, &dev);
815 if (ACPI_SUCCESS(status) && (dev == device)) {
816 result = action(thermal, trip, cdev);
817 if (result)
818 goto failed;
819 }
820 }
821 }
822
823 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
824 if (!tz->trips.active[i].flags.valid)
825 break;
826 trip++;
827 for (j = 0;
828 j < tz->trips.active[i].devices.count;
829 j++) {
830 handle = tz->trips.active[i].devices.handles[j];
831 status = acpi_bus_get_device(handle, &dev);
832 if (ACPI_SUCCESS(status) && (dev == device)) {
833 result = action(thermal, trip, cdev);
834 if (result)
835 goto failed;
836 }
837 }
838 }
839
840 for (i = 0; i < tz->devices.count; i++) {
841 handle = tz->devices.handles[i];
842 status = acpi_bus_get_device(handle, &dev);
843 if (ACPI_SUCCESS(status) && (dev == device)) {
844 result = action(thermal, -1, cdev);
845 if (result)
846 goto failed;
847 }
848 }
849
850 failed:
851 return result;
852 }
853
854 static int
855 acpi_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,
859 thermal_zone_bind_cooling_device);
860 }
861
862 static int
863 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
864 struct thermal_cooling_device *cdev)
865 {
866 return acpi_thermal_cooling_device_cb(thermal, cdev,
867 thermal_zone_unbind_cooling_device);
868 }
869
870 static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
871 .bind = acpi_thermal_bind_cooling_device,
872 .unbind = acpi_thermal_unbind_cooling_device,
873 .get_temp = thermal_get_temp,
874 .get_mode = thermal_get_mode,
875 .set_mode = thermal_set_mode,
876 .get_trip_type = thermal_get_trip_type,
877 .get_trip_temp = thermal_get_trip_temp,
878 .get_crit_temp = thermal_get_crit_temp,
879 .notify = thermal_notify,
880 };
881
882 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
883 {
884 int trips = 0;
885 int result;
886 acpi_status status;
887 int i;
888
889 if (tz->trips.critical.flags.valid)
890 trips++;
891
892 if (tz->trips.hot.flags.valid)
893 trips++;
894
895 if (tz->trips.passive.flags.valid)
896 trips++;
897
898 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
899 tz->trips.active[i].flags.valid; i++, trips++);
900
901 if (tz->trips.passive.flags.valid)
902 tz->thermal_zone =
903 thermal_zone_device_register("acpitz", trips, tz,
904 &acpi_thermal_zone_ops,
905 tz->trips.passive.tc1,
906 tz->trips.passive.tc2,
907 tz->trips.passive.tsp*100,
908 tz->polling_frequency*100);
909 else
910 tz->thermal_zone =
911 thermal_zone_device_register("acpitz", trips, tz,
912 &acpi_thermal_zone_ops,
913 0, 0, 0,
914 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
944 static 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 FS Interface (/proc)
956 -------------------------------------------------------------------------- */
957
958 static struct proc_dir_entry *acpi_thermal_dir;
959
960 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
961 {
962 struct acpi_thermal *tz = seq->private;
963
964
965 if (!tz)
966 goto end;
967
968 seq_puts(seq, "state: ");
969
970 if (!tz->state.critical && !tz->state.hot && !tz->state.passive
971 && !tz->state.active)
972 seq_puts(seq, "ok\n");
973 else {
974 if (tz->state.critical)
975 seq_puts(seq, "critical ");
976 if (tz->state.hot)
977 seq_puts(seq, "hot ");
978 if (tz->state.passive)
979 seq_puts(seq, "passive ");
980 if (tz->state.active)
981 seq_printf(seq, "active[%d]", tz->state.active_index);
982 seq_puts(seq, "\n");
983 }
984
985 end:
986 return 0;
987 }
988
989 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
990 {
991 return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
992 }
993
994 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
995 {
996 int result = 0;
997 struct acpi_thermal *tz = seq->private;
998
999
1000 if (!tz)
1001 goto end;
1002
1003 result = acpi_thermal_get_temperature(tz);
1004 if (result)
1005 goto end;
1006
1007 seq_printf(seq, "temperature: %ld C\n",
1008 KELVIN_TO_CELSIUS(tz->temperature));
1009
1010 end:
1011 return 0;
1012 }
1013
1014 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
1015 {
1016 return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
1017 }
1018
1019 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
1020 {
1021 struct acpi_thermal *tz = seq->private;
1022 struct acpi_device *device;
1023 acpi_status status;
1024
1025 int i = 0;
1026 int j = 0;
1027
1028
1029 if (!tz)
1030 goto end;
1031
1032 if (tz->trips.critical.flags.valid)
1033 seq_printf(seq, "critical (S5): %ld C%s",
1034 KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
1035 nocrt ? " <disabled>\n" : "\n");
1036
1037 if (tz->trips.hot.flags.valid)
1038 seq_printf(seq, "hot (S4): %ld C%s",
1039 KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
1040 nocrt ? " <disabled>\n" : "\n");
1041
1042 if (tz->trips.passive.flags.valid) {
1043 seq_printf(seq,
1044 "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
1045 KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
1046 tz->trips.passive.tc1, tz->trips.passive.tc2,
1047 tz->trips.passive.tsp);
1048 for (j = 0; j < tz->trips.passive.devices.count; j++) {
1049 status = acpi_bus_get_device(tz->trips.passive.devices.
1050 handles[j], &device);
1051 seq_printf(seq, "%4.4s ", status ? "" :
1052 acpi_device_bid(device));
1053 }
1054 seq_puts(seq, "\n");
1055 }
1056
1057 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1058 if (!(tz->trips.active[i].flags.valid))
1059 break;
1060 seq_printf(seq, "active[%d]: %ld C: devices=",
1061 i,
1062 KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
1063 for (j = 0; j < tz->trips.active[i].devices.count; j++){
1064 status = acpi_bus_get_device(tz->trips.active[i].
1065 devices.handles[j],
1066 &device);
1067 seq_printf(seq, "%4.4s ", status ? "" :
1068 acpi_device_bid(device));
1069 }
1070 seq_puts(seq, "\n");
1071 }
1072
1073 end:
1074 return 0;
1075 }
1076
1077 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
1078 {
1079 return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
1080 }
1081
1082 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
1083 {
1084 struct acpi_thermal *tz = seq->private;
1085
1086
1087 if (!tz)
1088 goto end;
1089
1090 if (!tz->flags.cooling_mode)
1091 seq_puts(seq, "<setting not supported>\n");
1092 else
1093 seq_puts(seq, "0 - Active; 1 - Passive\n");
1094
1095 end:
1096 return 0;
1097 }
1098
1099 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
1100 {
1101 return single_open(file, acpi_thermal_cooling_seq_show,
1102 PDE(inode)->data);
1103 }
1104
1105 static ssize_t
1106 acpi_thermal_write_cooling_mode(struct file *file,
1107 const char __user * buffer,
1108 size_t count, loff_t * ppos)
1109 {
1110 struct seq_file *m = file->private_data;
1111 struct acpi_thermal *tz = m->private;
1112 int result = 0;
1113 char mode_string[12] = { '\0' };
1114
1115
1116 if (!tz || (count > sizeof(mode_string) - 1))
1117 return -EINVAL;
1118
1119 if (!tz->flags.cooling_mode)
1120 return -ENODEV;
1121
1122 if (copy_from_user(mode_string, buffer, count))
1123 return -EFAULT;
1124
1125 mode_string[count] = '\0';
1126
1127 result = acpi_thermal_set_cooling_mode(tz,
1128 simple_strtoul(mode_string, NULL,
1129 0));
1130 if (result)
1131 return result;
1132
1133 acpi_thermal_check(tz);
1134
1135 return count;
1136 }
1137
1138 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
1139 {
1140 struct acpi_thermal *tz = seq->private;
1141
1142
1143 if (!tz)
1144 goto end;
1145
1146 if (!tz->thermal_zone->polling_delay) {
1147 seq_puts(seq, "<polling disabled>\n");
1148 goto end;
1149 }
1150
1151 seq_printf(seq, "polling frequency: %d seconds\n",
1152 (tz->thermal_zone->polling_delay / 1000));
1153
1154 end:
1155 return 0;
1156 }
1157
1158 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
1159 {
1160 return single_open(file, acpi_thermal_polling_seq_show,
1161 PDE(inode)->data);
1162 }
1163
1164 static ssize_t
1165 acpi_thermal_write_polling(struct file *file,
1166 const char __user * buffer,
1167 size_t count, loff_t * ppos)
1168 {
1169 struct seq_file *m = file->private_data;
1170 struct acpi_thermal *tz = m->private;
1171 int result = 0;
1172 char polling_string[12] = { '\0' };
1173 int seconds = 0;
1174
1175
1176 if (!tz || (count > sizeof(polling_string) - 1))
1177 return -EINVAL;
1178
1179 if (copy_from_user(polling_string, buffer, count))
1180 return -EFAULT;
1181
1182 polling_string[count] = '\0';
1183
1184 seconds = simple_strtoul(polling_string, NULL, 0);
1185
1186 result = acpi_thermal_set_polling(tz, seconds);
1187 if (result)
1188 return result;
1189
1190 acpi_thermal_check(tz);
1191
1192 return count;
1193 }
1194
1195 static int acpi_thermal_add_fs(struct acpi_device *device)
1196 {
1197 struct proc_dir_entry *entry = NULL;
1198
1199
1200 if (!acpi_device_dir(device)) {
1201 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1202 acpi_thermal_dir);
1203 if (!acpi_device_dir(device))
1204 return -ENODEV;
1205 }
1206
1207 /* 'state' [R] */
1208 entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
1209 S_IRUGO, acpi_device_dir(device),
1210 &acpi_thermal_state_fops,
1211 acpi_driver_data(device));
1212 if (!entry)
1213 return -ENODEV;
1214
1215 /* 'temperature' [R] */
1216 entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
1217 S_IRUGO, acpi_device_dir(device),
1218 &acpi_thermal_temp_fops,
1219 acpi_driver_data(device));
1220 if (!entry)
1221 return -ENODEV;
1222
1223 /* 'trip_points' [R] */
1224 entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
1225 S_IRUGO,
1226 acpi_device_dir(device),
1227 &acpi_thermal_trip_fops,
1228 acpi_driver_data(device));
1229 if (!entry)
1230 return -ENODEV;
1231
1232 /* 'cooling_mode' [R/W] */
1233 entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
1234 S_IFREG | S_IRUGO | S_IWUSR,
1235 acpi_device_dir(device),
1236 &acpi_thermal_cooling_fops,
1237 acpi_driver_data(device));
1238 if (!entry)
1239 return -ENODEV;
1240
1241 /* 'polling_frequency' [R/W] */
1242 entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
1243 S_IFREG | S_IRUGO | S_IWUSR,
1244 acpi_device_dir(device),
1245 &acpi_thermal_polling_fops,
1246 acpi_driver_data(device));
1247 if (!entry)
1248 return -ENODEV;
1249 return 0;
1250 }
1251
1252 static int acpi_thermal_remove_fs(struct acpi_device *device)
1253 {
1254
1255 if (acpi_device_dir(device)) {
1256 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
1257 acpi_device_dir(device));
1258 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
1259 acpi_device_dir(device));
1260 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
1261 acpi_device_dir(device));
1262 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
1263 acpi_device_dir(device));
1264 remove_proc_entry(ACPI_THERMAL_FILE_STATE,
1265 acpi_device_dir(device));
1266 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
1267 acpi_device_dir(device) = NULL;
1268 }
1269
1270 return 0;
1271 }
1272
1273 /* --------------------------------------------------------------------------
1274 Driver Interface
1275 -------------------------------------------------------------------------- */
1276
1277 static void acpi_thermal_notify(struct acpi_device *device, u32 event)
1278 {
1279 struct acpi_thermal *tz = acpi_driver_data(device);
1280
1281
1282 if (!tz)
1283 return;
1284
1285 switch (event) {
1286 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
1287 acpi_thermal_check(tz);
1288 break;
1289 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
1290 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
1291 acpi_thermal_check(tz);
1292 acpi_bus_generate_proc_event(device, event, 0);
1293 acpi_bus_generate_netlink_event(device->pnp.device_class,
1294 dev_name(&device->dev), event, 0);
1295 break;
1296 case ACPI_THERMAL_NOTIFY_DEVICES:
1297 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
1298 acpi_thermal_check(tz);
1299 acpi_bus_generate_proc_event(device, event, 0);
1300 acpi_bus_generate_netlink_event(device->pnp.device_class,
1301 dev_name(&device->dev), event, 0);
1302 break;
1303 default:
1304 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1305 "Unsupported event [0x%x]\n", event));
1306 break;
1307 }
1308 }
1309
1310 static int acpi_thermal_get_info(struct acpi_thermal *tz)
1311 {
1312 int result = 0;
1313
1314
1315 if (!tz)
1316 return -EINVAL;
1317
1318 /* Get temperature [_TMP] (required) */
1319 result = acpi_thermal_get_temperature(tz);
1320 if (result)
1321 return result;
1322
1323 /* Get trip points [_CRT, _PSV, etc.] (required) */
1324 result = acpi_thermal_get_trip_points(tz);
1325 if (result)
1326 return result;
1327
1328 /* Set the cooling mode [_SCP] to active cooling (default) */
1329 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1330 if (!result)
1331 tz->flags.cooling_mode = 1;
1332
1333 /* Get default polling frequency [_TZP] (optional) */
1334 if (tzp)
1335 tz->polling_frequency = tzp;
1336 else
1337 acpi_thermal_get_polling_frequency(tz);
1338
1339 return 0;
1340 }
1341
1342 /*
1343 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1344 * handles temperature values with a single decimal place. As a consequence,
1345 * some implementations use an offset of 273.1 and others use an offset of
1346 * 273.2. Try to find out which one is being used, to present the most
1347 * accurate and visually appealing number.
1348 *
1349 * The heuristic below should work for all ACPI thermal zones which have a
1350 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1351 */
1352 static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1353 {
1354 if (tz->trips.critical.flags.valid &&
1355 (tz->trips.critical.temperature % 5) == 1)
1356 tz->kelvin_offset = 2731;
1357 else
1358 tz->kelvin_offset = 2732;
1359 }
1360
1361 static int acpi_thermal_add(struct acpi_device *device)
1362 {
1363 int result = 0;
1364 struct acpi_thermal *tz = NULL;
1365
1366
1367 if (!device)
1368 return -EINVAL;
1369
1370 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1371 if (!tz)
1372 return -ENOMEM;
1373
1374 tz->device = device;
1375 strcpy(tz->name, device->pnp.bus_id);
1376 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1377 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1378 device->driver_data = tz;
1379 mutex_init(&tz->lock);
1380
1381
1382 result = acpi_thermal_get_info(tz);
1383 if (result)
1384 goto free_memory;
1385
1386 acpi_thermal_guess_offset(tz);
1387
1388 result = acpi_thermal_register_thermal_zone(tz);
1389 if (result)
1390 goto free_memory;
1391
1392 result = acpi_thermal_add_fs(device);
1393 if (result)
1394 goto unregister_thermal_zone;
1395
1396 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1397 acpi_device_name(device), acpi_device_bid(device),
1398 KELVIN_TO_CELSIUS(tz->temperature));
1399 goto end;
1400
1401 unregister_thermal_zone:
1402 thermal_zone_device_unregister(tz->thermal_zone);
1403 free_memory:
1404 kfree(tz);
1405 end:
1406 return result;
1407 }
1408
1409 static int acpi_thermal_remove(struct acpi_device *device, int type)
1410 {
1411 struct acpi_thermal *tz = NULL;
1412
1413 if (!device || !acpi_driver_data(device))
1414 return -EINVAL;
1415
1416 tz = acpi_driver_data(device);
1417
1418 acpi_thermal_remove_fs(device);
1419 acpi_thermal_unregister_thermal_zone(tz);
1420 mutex_destroy(&tz->lock);
1421 kfree(tz);
1422 return 0;
1423 }
1424
1425 static int acpi_thermal_resume(struct acpi_device *device)
1426 {
1427 struct acpi_thermal *tz = NULL;
1428 int i, j, power_state, result;
1429
1430
1431 if (!device || !acpi_driver_data(device))
1432 return -EINVAL;
1433
1434 tz = acpi_driver_data(device);
1435
1436 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1437 if (!(&tz->trips.active[i]))
1438 break;
1439 if (!tz->trips.active[i].flags.valid)
1440 break;
1441 tz->trips.active[i].flags.enabled = 1;
1442 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1443 result = acpi_bus_get_power(tz->trips.active[i].devices.
1444 handles[j], &power_state);
1445 if (result || (power_state != ACPI_STATE_D0)) {
1446 tz->trips.active[i].flags.enabled = 0;
1447 break;
1448 }
1449 }
1450 tz->state.active |= tz->trips.active[i].flags.enabled;
1451 }
1452
1453 acpi_thermal_check(tz);
1454
1455 return AE_OK;
1456 }
1457
1458 static int thermal_act(const struct dmi_system_id *d) {
1459
1460 if (act == 0) {
1461 printk(KERN_NOTICE "ACPI: %s detected: "
1462 "disabling all active thermal trip points\n", d->ident);
1463 act = -1;
1464 }
1465 return 0;
1466 }
1467 static int thermal_nocrt(const struct dmi_system_id *d) {
1468
1469 printk(KERN_NOTICE "ACPI: %s detected: "
1470 "disabling all critical thermal trip point actions.\n", d->ident);
1471 nocrt = 1;
1472 return 0;
1473 }
1474 static int thermal_tzp(const struct dmi_system_id *d) {
1475
1476 if (tzp == 0) {
1477 printk(KERN_NOTICE "ACPI: %s detected: "
1478 "enabling thermal zone polling\n", d->ident);
1479 tzp = 300; /* 300 dS = 30 Seconds */
1480 }
1481 return 0;
1482 }
1483 static int thermal_psv(const struct dmi_system_id *d) {
1484
1485 if (psv == 0) {
1486 printk(KERN_NOTICE "ACPI: %s detected: "
1487 "disabling all passive thermal trip points\n", d->ident);
1488 psv = -1;
1489 }
1490 return 0;
1491 }
1492
1493 static struct dmi_system_id thermal_dmi_table[] __initdata = {
1494 /*
1495 * Award BIOS on this AOpen makes thermal control almost worthless.
1496 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1497 */
1498 {
1499 .callback = thermal_act,
1500 .ident = "AOpen i915GMm-HFS",
1501 .matches = {
1502 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1503 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1504 },
1505 },
1506 {
1507 .callback = thermal_psv,
1508 .ident = "AOpen i915GMm-HFS",
1509 .matches = {
1510 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1511 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1512 },
1513 },
1514 {
1515 .callback = thermal_tzp,
1516 .ident = "AOpen i915GMm-HFS",
1517 .matches = {
1518 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1519 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1520 },
1521 },
1522 {
1523 .callback = thermal_nocrt,
1524 .ident = "Gigabyte GA-7ZX",
1525 .matches = {
1526 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1527 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1528 },
1529 },
1530 {}
1531 };
1532
1533 static int __init acpi_thermal_init(void)
1534 {
1535 int result = 0;
1536
1537 dmi_check_system(thermal_dmi_table);
1538
1539 if (off) {
1540 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1541 return -ENODEV;
1542 }
1543 acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
1544 if (!acpi_thermal_dir)
1545 return -ENODEV;
1546
1547 result = acpi_bus_register_driver(&acpi_thermal_driver);
1548 if (result < 0) {
1549 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1550 return -ENODEV;
1551 }
1552
1553 return 0;
1554 }
1555
1556 static void __exit acpi_thermal_exit(void)
1557 {
1558
1559 acpi_bus_unregister_driver(&acpi_thermal_driver);
1560
1561 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1562
1563 return;
1564 }
1565
1566 module_init(acpi_thermal_init);
1567 module_exit(acpi_thermal_exit);
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