ACPI: move thermal trip handling to generic thermal layer
[linux-2.6.git] / drivers / acpi / thermal.c
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 <asm/uaccess.h>
45 #include <linux/thermal.h>
46 #include <acpi/acpi_bus.h>
47 #include <acpi/acpi_drivers.h>
48
49 #define ACPI_THERMAL_CLASS              "thermal_zone"
50 #define ACPI_THERMAL_DEVICE_NAME        "Thermal Zone"
51 #define ACPI_THERMAL_FILE_STATE         "state"
52 #define ACPI_THERMAL_FILE_TEMPERATURE   "temperature"
53 #define ACPI_THERMAL_FILE_TRIP_POINTS   "trip_points"
54 #define ACPI_THERMAL_FILE_COOLING_MODE  "cooling_mode"
55 #define ACPI_THERMAL_FILE_POLLING_FREQ  "polling_frequency"
56 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
57 #define ACPI_THERMAL_NOTIFY_THRESHOLDS  0x81
58 #define ACPI_THERMAL_NOTIFY_DEVICES     0x82
59 #define ACPI_THERMAL_NOTIFY_CRITICAL    0xF0
60 #define ACPI_THERMAL_NOTIFY_HOT         0xF1
61 #define ACPI_THERMAL_MODE_ACTIVE        0x00
62
63 #define ACPI_THERMAL_MAX_ACTIVE 10
64 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
65
66 #define _COMPONENT              ACPI_THERMAL_COMPONENT
67 ACPI_MODULE_NAME("thermal");
68
69 MODULE_AUTHOR("Paul Diefenbaugh");
70 MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
71 MODULE_LICENSE("GPL");
72
73 static int act;
74 module_param(act, int, 0644);
75 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
76
77 static int crt;
78 module_param(crt, int, 0644);
79 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
80
81 static int tzp;
82 module_param(tzp, int, 0444);
83 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
84
85 static int nocrt;
86 module_param(nocrt, int, 0);
87 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
88
89 static int off;
90 module_param(off, int, 0);
91 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
92
93 static int psv;
94 module_param(psv, int, 0644);
95 MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
96
97 static int acpi_thermal_add(struct acpi_device *device);
98 static int acpi_thermal_remove(struct acpi_device *device, int type);
99 static int acpi_thermal_resume(struct acpi_device *device);
100 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
101 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
102 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
103 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
104 static ssize_t acpi_thermal_write_cooling_mode(struct file *,
105                                                const char __user *, size_t,
106                                                loff_t *);
107 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
108 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
109                                           size_t, loff_t *);
110
111 static const struct acpi_device_id  thermal_device_ids[] = {
112         {ACPI_THERMAL_HID, 0},
113         {"", 0},
114 };
115 MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
116
117 static struct acpi_driver acpi_thermal_driver = {
118         .name = "thermal",
119         .class = ACPI_THERMAL_CLASS,
120         .ids = thermal_device_ids,
121         .ops = {
122                 .add = acpi_thermal_add,
123                 .remove = acpi_thermal_remove,
124                 .resume = acpi_thermal_resume,
125                 },
126 };
127
128 struct acpi_thermal_state {
129         u8 critical:1;
130         u8 hot:1;
131         u8 passive:1;
132         u8 active:1;
133         u8 reserved:4;
134         int active_index;
135 };
136
137 struct acpi_thermal_state_flags {
138         u8 valid:1;
139         u8 enabled:1;
140         u8 reserved:6;
141 };
142
143 struct acpi_thermal_critical {
144         struct acpi_thermal_state_flags flags;
145         unsigned long temperature;
146 };
147
148 struct acpi_thermal_hot {
149         struct acpi_thermal_state_flags flags;
150         unsigned long temperature;
151 };
152
153 struct acpi_thermal_passive {
154         struct acpi_thermal_state_flags flags;
155         unsigned long temperature;
156         unsigned long tc1;
157         unsigned long tc2;
158         unsigned long tsp;
159         struct acpi_handle_list devices;
160 };
161
162 struct acpi_thermal_active {
163         struct acpi_thermal_state_flags flags;
164         unsigned long temperature;
165         struct acpi_handle_list devices;
166 };
167
168 struct acpi_thermal_trips {
169         struct acpi_thermal_critical critical;
170         struct acpi_thermal_hot hot;
171         struct acpi_thermal_passive passive;
172         struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
173 };
174
175 struct acpi_thermal_flags {
176         u8 cooling_mode:1;      /* _SCP */
177         u8 devices:1;           /* _TZD */
178         u8 reserved:6;
179 };
180
181 struct acpi_thermal {
182         struct acpi_device * device;
183         acpi_bus_id name;
184         unsigned long temperature;
185         unsigned long last_temperature;
186         unsigned long polling_frequency;
187         volatile u8 zombie;
188         struct acpi_thermal_flags flags;
189         struct acpi_thermal_state state;
190         struct acpi_thermal_trips trips;
191         struct acpi_handle_list devices;
192         struct thermal_zone_device *thermal_zone;
193         int tz_enabled;
194         struct mutex lock;
195 };
196
197 static const struct file_operations acpi_thermal_state_fops = {
198         .owner = THIS_MODULE,
199         .open = acpi_thermal_state_open_fs,
200         .read = seq_read,
201         .llseek = seq_lseek,
202         .release = single_release,
203 };
204
205 static const struct file_operations acpi_thermal_temp_fops = {
206         .owner = THIS_MODULE,
207         .open = acpi_thermal_temp_open_fs,
208         .read = seq_read,
209         .llseek = seq_lseek,
210         .release = single_release,
211 };
212
213 static const struct file_operations acpi_thermal_trip_fops = {
214         .owner = THIS_MODULE,
215         .open = acpi_thermal_trip_open_fs,
216         .read = seq_read,
217         .llseek = seq_lseek,
218         .release = single_release,
219 };
220
221 static const struct file_operations acpi_thermal_cooling_fops = {
222         .owner = THIS_MODULE,
223         .open = acpi_thermal_cooling_open_fs,
224         .read = seq_read,
225         .write = acpi_thermal_write_cooling_mode,
226         .llseek = seq_lseek,
227         .release = single_release,
228 };
229
230 static const struct file_operations acpi_thermal_polling_fops = {
231         .owner = THIS_MODULE,
232         .open = acpi_thermal_polling_open_fs,
233         .read = seq_read,
234         .write = acpi_thermal_write_polling,
235         .llseek = seq_lseek,
236         .release = single_release,
237 };
238
239 /* --------------------------------------------------------------------------
240                              Thermal Zone Management
241    -------------------------------------------------------------------------- */
242
243 static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
244 {
245         acpi_status status = AE_OK;
246         unsigned long long tmp;
247
248         if (!tz)
249                 return -EINVAL;
250
251         tz->last_temperature = tz->temperature;
252
253         status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
254         if (ACPI_FAILURE(status))
255                 return -ENODEV;
256
257         tz->temperature = tmp;
258         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
259                           tz->temperature));
260
261         return 0;
262 }
263
264 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
265 {
266         acpi_status status = AE_OK;
267         unsigned long long tmp;
268
269         if (!tz)
270                 return -EINVAL;
271
272         status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
273         if (ACPI_FAILURE(status))
274                 return -ENODEV;
275
276         tz->polling_frequency = tmp;
277         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
278                           tz->polling_frequency));
279
280         return 0;
281 }
282
283 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
284 {
285
286         if (!tz)
287                 return -EINVAL;
288
289         tz->polling_frequency = seconds * 10;   /* Convert value to deci-seconds */
290
291         tz->thermal_zone->polling_delay = seconds * 1000;
292
293         if (tz->tz_enabled)
294                 thermal_zone_device_update(tz->thermal_zone);
295
296         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
297                           "Polling frequency set to %lu seconds\n",
298                           tz->polling_frequency/10));
299
300         return 0;
301 }
302
303 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
304 {
305         acpi_status status = AE_OK;
306         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
307         struct acpi_object_list arg_list = { 1, &arg0 };
308         acpi_handle handle = NULL;
309
310
311         if (!tz)
312                 return -EINVAL;
313
314         status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
315         if (ACPI_FAILURE(status)) {
316                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
317                 return -ENODEV;
318         }
319
320         arg0.integer.value = mode;
321
322         status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
323         if (ACPI_FAILURE(status))
324                 return -ENODEV;
325
326         return 0;
327 }
328
329 #define ACPI_TRIPS_CRITICAL     0x01
330 #define ACPI_TRIPS_HOT          0x02
331 #define ACPI_TRIPS_PASSIVE      0x04
332 #define ACPI_TRIPS_ACTIVE       0x08
333 #define ACPI_TRIPS_DEVICES      0x10
334
335 #define ACPI_TRIPS_REFRESH_THRESHOLDS   (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
336 #define ACPI_TRIPS_REFRESH_DEVICES      ACPI_TRIPS_DEVICES
337
338 #define ACPI_TRIPS_INIT      (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT |    \
339                               ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE |  \
340                               ACPI_TRIPS_DEVICES)
341
342 /*
343  * This exception is thrown out in two cases:
344  * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
345  *   when re-evaluating the AML code.
346  * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
347  *   We need to re-bind the cooling devices of a thermal zone when this occurs.
348  */
349 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str)        \
350 do {    \
351         if (flags != ACPI_TRIPS_INIT)   \
352                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,      \
353                 "ACPI thermal trip point %s changed\n"  \
354                 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
355 } while (0)
356
357 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
358 {
359         acpi_status status = AE_OK;
360         unsigned long long tmp;
361         struct acpi_handle_list devices;
362         int valid = 0;
363         int i;
364
365         /* Critical Shutdown (required) */
366         if (flag & ACPI_TRIPS_CRITICAL) {
367                 status = acpi_evaluate_integer(tz->device->handle,
368                                 "_CRT", NULL, &tmp);
369                 tz->trips.critical.temperature = tmp;
370                 /*
371                  * Treat freezing temperatures as invalid as well; some
372                  * BIOSes return really low values and cause reboots at startup.
373                  * Below zero (Celcius) values clearly aren't right for sure..
374                  * ... so lets discard those as invalid.
375                  */
376                 if (ACPI_FAILURE(status) ||
377                                 tz->trips.critical.temperature <= 2732) {
378                         tz->trips.critical.flags.valid = 0;
379                         ACPI_EXCEPTION((AE_INFO, status,
380                                         "No or invalid critical threshold"));
381                         return -ENODEV;
382                 } else {
383                         tz->trips.critical.flags.valid = 1;
384                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
385                                         "Found critical threshold [%lu]\n",
386                                         tz->trips.critical.temperature));
387                 }
388                 if (tz->trips.critical.flags.valid == 1) {
389                         if (crt == -1) {
390                                 tz->trips.critical.flags.valid = 0;
391                         } else if (crt > 0) {
392                                 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
393                                 /*
394                                  * Allow override critical threshold
395                                  */
396                                 if (crt_k > tz->trips.critical.temperature)
397                                         printk(KERN_WARNING PREFIX
398                                                 "Critical threshold %d C\n", crt);
399                                 tz->trips.critical.temperature = crt_k;
400                         }
401                 }
402         }
403
404         /* Critical Sleep (optional) */
405         if (flag & ACPI_TRIPS_HOT) {
406                 status = acpi_evaluate_integer(tz->device->handle,
407                                 "_HOT", NULL, &tmp);
408                 if (ACPI_FAILURE(status)) {
409                         tz->trips.hot.flags.valid = 0;
410                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
411                                         "No hot threshold\n"));
412                 } else {
413                         tz->trips.hot.temperature = tmp;
414                         tz->trips.hot.flags.valid = 1;
415                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
416                                         "Found hot threshold [%lu]\n",
417                                         tz->trips.critical.temperature));
418                 }
419         }
420
421         /* Passive (optional) */
422         if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
423                 (flag == ACPI_TRIPS_INIT)) {
424                 valid = tz->trips.passive.flags.valid;
425                 if (psv == -1) {
426                         status = AE_SUPPORT;
427                 } else if (psv > 0) {
428                         tmp = CELSIUS_TO_KELVIN(psv);
429                         status = AE_OK;
430                 } else {
431                         status = acpi_evaluate_integer(tz->device->handle,
432                                 "_PSV", NULL, &tmp);
433                 }
434
435                 if (ACPI_FAILURE(status))
436                         tz->trips.passive.flags.valid = 0;
437                 else {
438                         tz->trips.passive.temperature = tmp;
439                         tz->trips.passive.flags.valid = 1;
440                         if (flag == ACPI_TRIPS_INIT) {
441                                 status = acpi_evaluate_integer(
442                                                 tz->device->handle, "_TC1",
443                                                 NULL, &tmp);
444                                 if (ACPI_FAILURE(status))
445                                         tz->trips.passive.flags.valid = 0;
446                                 else
447                                         tz->trips.passive.tc1 = tmp;
448                                 status = acpi_evaluate_integer(
449                                                 tz->device->handle, "_TC2",
450                                                 NULL, &tmp);
451                                 if (ACPI_FAILURE(status))
452                                         tz->trips.passive.flags.valid = 0;
453                                 else
454                                         tz->trips.passive.tc2 = tmp;
455                                 status = acpi_evaluate_integer(
456                                                 tz->device->handle, "_TSP",
457                                                 NULL, &tmp);
458                                 if (ACPI_FAILURE(status))
459                                         tz->trips.passive.flags.valid = 0;
460                                 else
461                                         tz->trips.passive.tsp = tmp;
462                         }
463                 }
464         }
465         if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
466                 memset(&devices, 0, sizeof(struct acpi_handle_list));
467                 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
468                                                         NULL, &devices);
469                 if (ACPI_FAILURE(status)) {
470                         printk(KERN_WARNING PREFIX
471                                 "Invalid passive threshold\n");
472                         tz->trips.passive.flags.valid = 0;
473                 }
474                 else
475                         tz->trips.passive.flags.valid = 1;
476
477                 if (memcmp(&tz->trips.passive.devices, &devices,
478                                 sizeof(struct acpi_handle_list))) {
479                         memcpy(&tz->trips.passive.devices, &devices,
480                                 sizeof(struct acpi_handle_list));
481                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
482                 }
483         }
484         if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
485                 if (valid != tz->trips.passive.flags.valid)
486                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
487         }
488
489         /* Active (optional) */
490         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
491                 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
492                 valid = tz->trips.active[i].flags.valid;
493
494                 if (act == -1)
495                         break; /* disable all active trip points */
496
497                 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
498                         tz->trips.active[i].flags.valid)) {
499                         status = acpi_evaluate_integer(tz->device->handle,
500                                                         name, NULL, &tmp);
501                         if (ACPI_FAILURE(status)) {
502                                 tz->trips.active[i].flags.valid = 0;
503                                 if (i == 0)
504                                         break;
505                                 if (act <= 0)
506                                         break;
507                                 if (i == 1)
508                                         tz->trips.active[0].temperature =
509                                                 CELSIUS_TO_KELVIN(act);
510                                 else
511                                         /*
512                                          * Don't allow override higher than
513                                          * the next higher trip point
514                                          */
515                                         tz->trips.active[i - 1].temperature =
516                                                 (tz->trips.active[i - 2].temperature <
517                                                 CELSIUS_TO_KELVIN(act) ?
518                                                 tz->trips.active[i - 2].temperature :
519                                                 CELSIUS_TO_KELVIN(act));
520                                 break;
521                         } else {
522                                 tz->trips.active[i].temperature = tmp;
523                                 tz->trips.active[i].flags.valid = 1;
524                         }
525                 }
526
527                 name[2] = 'L';
528                 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
529                         memset(&devices, 0, sizeof(struct acpi_handle_list));
530                         status = acpi_evaluate_reference(tz->device->handle,
531                                                 name, NULL, &devices);
532                         if (ACPI_FAILURE(status)) {
533                                 printk(KERN_WARNING PREFIX
534                                         "Invalid active%d threshold\n", i);
535                                 tz->trips.active[i].flags.valid = 0;
536                         }
537                         else
538                                 tz->trips.active[i].flags.valid = 1;
539
540                         if (memcmp(&tz->trips.active[i].devices, &devices,
541                                         sizeof(struct acpi_handle_list))) {
542                                 memcpy(&tz->trips.active[i].devices, &devices,
543                                         sizeof(struct acpi_handle_list));
544                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
545                         }
546                 }
547                 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
548                         if (valid != tz->trips.active[i].flags.valid)
549                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
550
551                 if (!tz->trips.active[i].flags.valid)
552                         break;
553         }
554
555         if (flag & ACPI_TRIPS_DEVICES) {
556                 memset(&devices, 0, sizeof(struct acpi_handle_list));
557                 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
558                                                 NULL, &devices);
559                 if (memcmp(&tz->devices, &devices,
560                                 sizeof(struct acpi_handle_list))) {
561                         memcpy(&tz->devices, &devices,
562                                 sizeof(struct acpi_handle_list));
563                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
564                 }
565         }
566
567         return 0;
568 }
569
570 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
571 {
572         return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
573 }
574
575 static void acpi_thermal_check(void *data)
576 {
577         struct acpi_thermal *tz = data;
578
579         thermal_zone_device_update(tz->thermal_zone);
580 }
581
582 /* sys I/F for generic thermal sysfs support */
583 #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
584
585 static int thermal_get_temp(struct thermal_zone_device *thermal,
586                             unsigned long *temp)
587 {
588         struct acpi_thermal *tz = thermal->devdata;
589         int result;
590
591         if (!tz)
592                 return -EINVAL;
593
594         result = acpi_thermal_get_temperature(tz);
595         if (result)
596                 return result;
597
598         *temp = KELVIN_TO_MILLICELSIUS(tz->temperature);
599         return 0;
600 }
601
602 static const char enabled[] = "kernel";
603 static const char disabled[] = "user";
604 static int thermal_get_mode(struct thermal_zone_device *thermal,
605                                 enum thermal_device_mode *mode)
606 {
607         struct acpi_thermal *tz = thermal->devdata;
608
609         if (!tz)
610                 return -EINVAL;
611
612         *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
613                 THERMAL_DEVICE_DISABLED;
614
615         return 0;
616 }
617
618 static int thermal_set_mode(struct thermal_zone_device *thermal,
619                                 enum thermal_device_mode mode)
620 {
621         struct acpi_thermal *tz = thermal->devdata;
622         int enable;
623
624         if (!tz)
625                 return -EINVAL;
626
627         /*
628          * enable/disable thermal management from ACPI thermal driver
629          */
630         if (mode == THERMAL_DEVICE_ENABLED)
631                 enable = 1;
632         else if (mode == THERMAL_DEVICE_DISABLED)
633                 enable = 0;
634         else
635                 return -EINVAL;
636
637         if (enable != tz->tz_enabled) {
638                 tz->tz_enabled = enable;
639                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
640                         "%s ACPI thermal control\n",
641                         tz->tz_enabled ? enabled : disabled));
642                 acpi_thermal_check(tz);
643         }
644         return 0;
645 }
646
647 static int thermal_get_trip_type(struct thermal_zone_device *thermal,
648                                  int trip, enum thermal_trip_type *type)
649 {
650         struct acpi_thermal *tz = thermal->devdata;
651         int i;
652
653         if (!tz || trip < 0)
654                 return -EINVAL;
655
656         if (tz->trips.critical.flags.valid) {
657                 if (!trip) {
658                         *type = THERMAL_TRIP_CRITICAL;
659                         return 0;
660                 }
661                 trip--;
662         }
663
664         if (tz->trips.hot.flags.valid) {
665                 if (!trip) {
666                         *type = THERMAL_TRIP_HOT;
667                         return 0;
668                 }
669                 trip--;
670         }
671
672         if (tz->trips.passive.flags.valid) {
673                 if (!trip) {
674                         *type = THERMAL_TRIP_PASSIVE;
675                         return 0;
676                 }
677                 trip--;
678         }
679
680         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
681                 tz->trips.active[i].flags.valid; i++) {
682                 if (!trip) {
683                         *type = THERMAL_TRIP_ACTIVE;
684                         return 0;
685                 }
686                 trip--;
687         }
688
689         return -EINVAL;
690 }
691
692 static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
693                                  int trip, unsigned long *temp)
694 {
695         struct acpi_thermal *tz = thermal->devdata;
696         int i;
697
698         if (!tz || trip < 0)
699                 return -EINVAL;
700
701         if (tz->trips.critical.flags.valid) {
702                 if (!trip) {
703                         *temp = KELVIN_TO_MILLICELSIUS(
704                                 tz->trips.critical.temperature);
705                         return 0;
706                 }
707                 trip--;
708         }
709
710         if (tz->trips.hot.flags.valid) {
711                 if (!trip) {
712                         *temp = KELVIN_TO_MILLICELSIUS(
713                                 tz->trips.hot.temperature);
714                         return 0;
715                 }
716                 trip--;
717         }
718
719         if (tz->trips.passive.flags.valid) {
720                 if (!trip) {
721                         *temp = KELVIN_TO_MILLICELSIUS(
722                                 tz->trips.passive.temperature);
723                         return 0;
724                 }
725                 trip--;
726         }
727
728         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
729                 tz->trips.active[i].flags.valid; i++) {
730                 if (!trip) {
731                         *temp = KELVIN_TO_MILLICELSIUS(
732                                 tz->trips.active[i].temperature);
733                         return 0;
734                 }
735                 trip--;
736         }
737
738         return -EINVAL;
739 }
740
741 static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
742                                 unsigned long *temperature) {
743         struct acpi_thermal *tz = thermal->devdata;
744
745         if (tz->trips.critical.flags.valid) {
746                 *temperature = KELVIN_TO_MILLICELSIUS(
747                                 tz->trips.critical.temperature);
748                 return 0;
749         } else
750                 return -EINVAL;
751 }
752
753 static int thermal_notify(struct thermal_zone_device *thermal, int trip,
754                            enum thermal_trip_type trip_type)
755 {
756         u8 type = 0;
757         struct acpi_thermal *tz = thermal->devdata;
758
759         if (trip_type == THERMAL_TRIP_CRITICAL)
760                 type = ACPI_THERMAL_NOTIFY_CRITICAL;
761         else if (trip_type == THERMAL_TRIP_HOT)
762                 type = ACPI_THERMAL_NOTIFY_HOT;
763         else
764                 return 0;
765
766         acpi_bus_generate_proc_event(tz->device, type, 1);
767         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
768                                         tz->device->dev.bus_id, type, 1);
769
770         if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
771                 return 1;
772
773         return 0;
774 }
775
776 typedef int (*cb)(struct thermal_zone_device *, int,
777                   struct thermal_cooling_device *);
778 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
779                                         struct thermal_cooling_device *cdev,
780                                         cb action)
781 {
782         struct acpi_device *device = cdev->devdata;
783         struct acpi_thermal *tz = thermal->devdata;
784         struct acpi_device *dev;
785         acpi_status status;
786         acpi_handle handle;
787         int i;
788         int j;
789         int trip = -1;
790         int result = 0;
791
792         if (tz->trips.critical.flags.valid)
793                 trip++;
794
795         if (tz->trips.hot.flags.valid)
796                 trip++;
797
798         if (tz->trips.passive.flags.valid) {
799                 trip++;
800                 for (i = 0; i < tz->trips.passive.devices.count;
801                     i++) {
802                         handle = tz->trips.passive.devices.handles[i];
803                         status = acpi_bus_get_device(handle, &dev);
804                         if (ACPI_SUCCESS(status) && (dev == device)) {
805                                 result = action(thermal, trip, cdev);
806                                 if (result)
807                                         goto failed;
808                         }
809                 }
810         }
811
812         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
813                 if (!tz->trips.active[i].flags.valid)
814                         break;
815                 trip++;
816                 for (j = 0;
817                     j < tz->trips.active[i].devices.count;
818                     j++) {
819                         handle = tz->trips.active[i].devices.handles[j];
820                         status = acpi_bus_get_device(handle, &dev);
821                         if (ACPI_SUCCESS(status) && (dev == device)) {
822                                 result = action(thermal, trip, cdev);
823                                 if (result)
824                                         goto failed;
825                         }
826                 }
827         }
828
829         for (i = 0; i < tz->devices.count; i++) {
830                 handle = tz->devices.handles[i];
831                 status = acpi_bus_get_device(handle, &dev);
832                 if (ACPI_SUCCESS(status) && (dev == device)) {
833                         result = action(thermal, -1, cdev);
834                         if (result)
835                                 goto failed;
836                 }
837         }
838
839 failed:
840         return result;
841 }
842
843 static int
844 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
845                                         struct thermal_cooling_device *cdev)
846 {
847         return acpi_thermal_cooling_device_cb(thermal, cdev,
848                                 thermal_zone_bind_cooling_device);
849 }
850
851 static int
852 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
853                                         struct thermal_cooling_device *cdev)
854 {
855         return acpi_thermal_cooling_device_cb(thermal, cdev,
856                                 thermal_zone_unbind_cooling_device);
857 }
858
859 static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
860         .bind = acpi_thermal_bind_cooling_device,
861         .unbind = acpi_thermal_unbind_cooling_device,
862         .get_temp = thermal_get_temp,
863         .get_mode = thermal_get_mode,
864         .set_mode = thermal_set_mode,
865         .get_trip_type = thermal_get_trip_type,
866         .get_trip_temp = thermal_get_trip_temp,
867         .get_crit_temp = thermal_get_crit_temp,
868         .notify = thermal_notify,
869 };
870
871 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
872 {
873         int trips = 0;
874         int result;
875         acpi_status status;
876         int i;
877
878         if (tz->trips.critical.flags.valid)
879                 trips++;
880
881         if (tz->trips.hot.flags.valid)
882                 trips++;
883
884         if (tz->trips.passive.flags.valid)
885                 trips++;
886
887         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
888                         tz->trips.active[i].flags.valid; i++, trips++);
889
890         if (tz->trips.passive.flags.valid)
891                 tz->thermal_zone =
892                         thermal_zone_device_register("acpitz", trips, tz,
893                                                      &acpi_thermal_zone_ops,
894                                                      tz->trips.passive.tc1,
895                                                      tz->trips.passive.tc2,
896                                                      tz->trips.passive.tsp*100,
897                                                      tz->polling_frequency*100);
898         else
899                 tz->thermal_zone =
900                         thermal_zone_device_register("acpitz", trips, tz,
901                                                      &acpi_thermal_zone_ops,
902                                                      0, 0, 0,
903                                                      tz->polling_frequency);
904         if (IS_ERR(tz->thermal_zone))
905                 return -ENODEV;
906
907         result = sysfs_create_link(&tz->device->dev.kobj,
908                                    &tz->thermal_zone->device.kobj, "thermal_zone");
909         if (result)
910                 return result;
911
912         result = sysfs_create_link(&tz->thermal_zone->device.kobj,
913                                    &tz->device->dev.kobj, "device");
914         if (result)
915                 return result;
916
917         status = acpi_attach_data(tz->device->handle,
918                                   acpi_bus_private_data_handler,
919                                   tz->thermal_zone);
920         if (ACPI_FAILURE(status)) {
921                 printk(KERN_ERR PREFIX
922                                 "Error attaching device data\n");
923                 return -ENODEV;
924         }
925
926         tz->tz_enabled = 1;
927
928         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
929                  tz->thermal_zone->id);
930         return 0;
931 }
932
933 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
934 {
935         sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
936         sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
937         thermal_zone_device_unregister(tz->thermal_zone);
938         tz->thermal_zone = NULL;
939         acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
940 }
941
942
943 /* --------------------------------------------------------------------------
944                               FS Interface (/proc)
945    -------------------------------------------------------------------------- */
946
947 static struct proc_dir_entry *acpi_thermal_dir;
948
949 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
950 {
951         struct acpi_thermal *tz = seq->private;
952
953
954         if (!tz)
955                 goto end;
956
957         seq_puts(seq, "state:                   ");
958
959         if (!tz->state.critical && !tz->state.hot && !tz->state.passive
960             && !tz->state.active)
961                 seq_puts(seq, "ok\n");
962         else {
963                 if (tz->state.critical)
964                         seq_puts(seq, "critical ");
965                 if (tz->state.hot)
966                         seq_puts(seq, "hot ");
967                 if (tz->state.passive)
968                         seq_puts(seq, "passive ");
969                 if (tz->state.active)
970                         seq_printf(seq, "active[%d]", tz->state.active_index);
971                 seq_puts(seq, "\n");
972         }
973
974       end:
975         return 0;
976 }
977
978 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
979 {
980         return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
981 }
982
983 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
984 {
985         int result = 0;
986         struct acpi_thermal *tz = seq->private;
987
988
989         if (!tz)
990                 goto end;
991
992         result = acpi_thermal_get_temperature(tz);
993         if (result)
994                 goto end;
995
996         seq_printf(seq, "temperature:             %ld C\n",
997                    KELVIN_TO_CELSIUS(tz->temperature));
998
999       end:
1000         return 0;
1001 }
1002
1003 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
1004 {
1005         return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
1006 }
1007
1008 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
1009 {
1010         struct acpi_thermal *tz = seq->private;
1011         struct acpi_device *device;
1012         acpi_status status;
1013
1014         int i = 0;
1015         int j = 0;
1016
1017
1018         if (!tz)
1019                 goto end;
1020
1021         if (tz->trips.critical.flags.valid)
1022                 seq_printf(seq, "critical (S5):           %ld C%s",
1023                            KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
1024                            nocrt ? " <disabled>\n" : "\n");
1025
1026         if (tz->trips.hot.flags.valid)
1027                 seq_printf(seq, "hot (S4):                %ld C%s",
1028                            KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
1029                            nocrt ? " <disabled>\n" : "\n");
1030
1031         if (tz->trips.passive.flags.valid) {
1032                 seq_printf(seq,
1033                            "passive:                 %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
1034                            KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
1035                            tz->trips.passive.tc1, tz->trips.passive.tc2,
1036                            tz->trips.passive.tsp);
1037                 for (j = 0; j < tz->trips.passive.devices.count; j++) {
1038                         status = acpi_bus_get_device(tz->trips.passive.devices.
1039                                                      handles[j], &device);
1040                         seq_printf(seq, "%4.4s ", status ? "" :
1041                                    acpi_device_bid(device));
1042                 }
1043                 seq_puts(seq, "\n");
1044         }
1045
1046         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1047                 if (!(tz->trips.active[i].flags.valid))
1048                         break;
1049                 seq_printf(seq, "active[%d]:               %ld C: devices=",
1050                            i,
1051                            KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
1052                 for (j = 0; j < tz->trips.active[i].devices.count; j++){
1053                         status = acpi_bus_get_device(tz->trips.active[i].
1054                                                      devices.handles[j],
1055                                                      &device);
1056                         seq_printf(seq, "%4.4s ", status ? "" :
1057                                    acpi_device_bid(device));
1058                 }
1059                 seq_puts(seq, "\n");
1060         }
1061
1062       end:
1063         return 0;
1064 }
1065
1066 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
1067 {
1068         return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
1069 }
1070
1071 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
1072 {
1073         struct acpi_thermal *tz = seq->private;
1074
1075
1076         if (!tz)
1077                 goto end;
1078
1079         if (!tz->flags.cooling_mode)
1080                 seq_puts(seq, "<setting not supported>\n");
1081         else
1082                 seq_puts(seq, "0 - Active; 1 - Passive\n");
1083
1084       end:
1085         return 0;
1086 }
1087
1088 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
1089 {
1090         return single_open(file, acpi_thermal_cooling_seq_show,
1091                            PDE(inode)->data);
1092 }
1093
1094 static ssize_t
1095 acpi_thermal_write_cooling_mode(struct file *file,
1096                                 const char __user * buffer,
1097                                 size_t count, loff_t * ppos)
1098 {
1099         struct seq_file *m = file->private_data;
1100         struct acpi_thermal *tz = m->private;
1101         int result = 0;
1102         char mode_string[12] = { '\0' };
1103
1104
1105         if (!tz || (count > sizeof(mode_string) - 1))
1106                 return -EINVAL;
1107
1108         if (!tz->flags.cooling_mode)
1109                 return -ENODEV;
1110
1111         if (copy_from_user(mode_string, buffer, count))
1112                 return -EFAULT;
1113
1114         mode_string[count] = '\0';
1115
1116         result = acpi_thermal_set_cooling_mode(tz,
1117                                                simple_strtoul(mode_string, NULL,
1118                                                               0));
1119         if (result)
1120                 return result;
1121
1122         acpi_thermal_check(tz);
1123
1124         return count;
1125 }
1126
1127 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
1128 {
1129         struct acpi_thermal *tz = seq->private;
1130
1131
1132         if (!tz)
1133                 goto end;
1134
1135         if (!tz->thermal_zone->polling_delay) {
1136                 seq_puts(seq, "<polling disabled>\n");
1137                 goto end;
1138         }
1139
1140         seq_printf(seq, "polling frequency:       %d seconds\n",
1141                    (tz->thermal_zone->polling_delay / 1000));
1142
1143       end:
1144         return 0;
1145 }
1146
1147 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
1148 {
1149         return single_open(file, acpi_thermal_polling_seq_show,
1150                            PDE(inode)->data);
1151 }
1152
1153 static ssize_t
1154 acpi_thermal_write_polling(struct file *file,
1155                            const char __user * buffer,
1156                            size_t count, loff_t * ppos)
1157 {
1158         struct seq_file *m = file->private_data;
1159         struct acpi_thermal *tz = m->private;
1160         int result = 0;
1161         char polling_string[12] = { '\0' };
1162         int seconds = 0;
1163
1164
1165         if (!tz || (count > sizeof(polling_string) - 1))
1166                 return -EINVAL;
1167
1168         if (copy_from_user(polling_string, buffer, count))
1169                 return -EFAULT;
1170
1171         polling_string[count] = '\0';
1172
1173         seconds = simple_strtoul(polling_string, NULL, 0);
1174
1175         result = acpi_thermal_set_polling(tz, seconds);
1176         if (result)
1177                 return result;
1178
1179         acpi_thermal_check(tz);
1180
1181         return count;
1182 }
1183
1184 static int acpi_thermal_add_fs(struct acpi_device *device)
1185 {
1186         struct proc_dir_entry *entry = NULL;
1187
1188
1189         if (!acpi_device_dir(device)) {
1190                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1191                                                      acpi_thermal_dir);
1192                 if (!acpi_device_dir(device))
1193                         return -ENODEV;
1194                 acpi_device_dir(device)->owner = THIS_MODULE;
1195         }
1196
1197         /* 'state' [R] */
1198         entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
1199                                  S_IRUGO, acpi_device_dir(device),
1200                                  &acpi_thermal_state_fops,
1201                                  acpi_driver_data(device));
1202         if (!entry)
1203                 return -ENODEV;
1204
1205         /* 'temperature' [R] */
1206         entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
1207                                  S_IRUGO, acpi_device_dir(device),
1208                                  &acpi_thermal_temp_fops,
1209                                  acpi_driver_data(device));
1210         if (!entry)
1211                 return -ENODEV;
1212
1213         /* 'trip_points' [R] */
1214         entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
1215                                  S_IRUGO,
1216                                  acpi_device_dir(device),
1217                                  &acpi_thermal_trip_fops,
1218                                  acpi_driver_data(device));
1219         if (!entry)
1220                 return -ENODEV;
1221
1222         /* 'cooling_mode' [R/W] */
1223         entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
1224                                  S_IFREG | S_IRUGO | S_IWUSR,
1225                                  acpi_device_dir(device),
1226                                  &acpi_thermal_cooling_fops,
1227                                  acpi_driver_data(device));
1228         if (!entry)
1229                 return -ENODEV;
1230
1231         /* 'polling_frequency' [R/W] */
1232         entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
1233                                  S_IFREG | S_IRUGO | S_IWUSR,
1234                                  acpi_device_dir(device),
1235                                  &acpi_thermal_polling_fops,
1236                                  acpi_driver_data(device));
1237         if (!entry)
1238                 return -ENODEV;
1239         return 0;
1240 }
1241
1242 static int acpi_thermal_remove_fs(struct acpi_device *device)
1243 {
1244
1245         if (acpi_device_dir(device)) {
1246                 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
1247                                   acpi_device_dir(device));
1248                 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
1249                                   acpi_device_dir(device));
1250                 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
1251                                   acpi_device_dir(device));
1252                 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
1253                                   acpi_device_dir(device));
1254                 remove_proc_entry(ACPI_THERMAL_FILE_STATE,
1255                                   acpi_device_dir(device));
1256                 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
1257                 acpi_device_dir(device) = NULL;
1258         }
1259
1260         return 0;
1261 }
1262
1263 /* --------------------------------------------------------------------------
1264                                  Driver Interface
1265    -------------------------------------------------------------------------- */
1266
1267 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
1268 {
1269         struct acpi_thermal *tz = data;
1270         struct acpi_device *device = NULL;
1271
1272
1273         if (!tz)
1274                 return;
1275
1276         device = tz->device;
1277
1278         switch (event) {
1279         case ACPI_THERMAL_NOTIFY_TEMPERATURE:
1280                 acpi_thermal_check(tz);
1281                 break;
1282         case ACPI_THERMAL_NOTIFY_THRESHOLDS:
1283                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
1284                 acpi_thermal_check(tz);
1285                 acpi_bus_generate_proc_event(device, event, 0);
1286                 acpi_bus_generate_netlink_event(device->pnp.device_class,
1287                                                   dev_name(&device->dev), event, 0);
1288                 break;
1289         case ACPI_THERMAL_NOTIFY_DEVICES:
1290                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
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         default:
1297                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1298                                   "Unsupported event [0x%x]\n", event));
1299                 break;
1300         }
1301
1302         return;
1303 }
1304
1305 static int acpi_thermal_get_info(struct acpi_thermal *tz)
1306 {
1307         int result = 0;
1308
1309
1310         if (!tz)
1311                 return -EINVAL;
1312
1313         /* Get temperature [_TMP] (required) */
1314         result = acpi_thermal_get_temperature(tz);
1315         if (result)
1316                 return result;
1317
1318         /* Get trip points [_CRT, _PSV, etc.] (required) */
1319         result = acpi_thermal_get_trip_points(tz);
1320         if (result)
1321                 return result;
1322
1323         /* Set the cooling mode [_SCP] to active cooling (default) */
1324         result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1325         if (!result)
1326                 tz->flags.cooling_mode = 1;
1327
1328         /* Get default polling frequency [_TZP] (optional) */
1329         if (tzp)
1330                 tz->polling_frequency = tzp;
1331         else
1332                 acpi_thermal_get_polling_frequency(tz);
1333
1334         return 0;
1335 }
1336
1337 static int acpi_thermal_add(struct acpi_device *device)
1338 {
1339         int result = 0;
1340         acpi_status status = AE_OK;
1341         struct acpi_thermal *tz = NULL;
1342
1343
1344         if (!device)
1345                 return -EINVAL;
1346
1347         tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1348         if (!tz)
1349                 return -ENOMEM;
1350
1351         tz->device = device;
1352         strcpy(tz->name, device->pnp.bus_id);
1353         strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1354         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1355         device->driver_data = tz;
1356         mutex_init(&tz->lock);
1357
1358
1359         result = acpi_thermal_get_info(tz);
1360         if (result)
1361                 goto free_memory;
1362
1363         result = acpi_thermal_register_thermal_zone(tz);
1364         if (result)
1365                 goto free_memory;
1366
1367         result = acpi_thermal_add_fs(device);
1368         if (result)
1369                 goto unregister_thermal_zone;
1370
1371         status = acpi_install_notify_handler(device->handle,
1372                                              ACPI_DEVICE_NOTIFY,
1373                                              acpi_thermal_notify, tz);
1374         if (ACPI_FAILURE(status)) {
1375                 result = -ENODEV;
1376                 goto remove_fs;
1377         }
1378
1379         printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1380                acpi_device_name(device), acpi_device_bid(device),
1381                KELVIN_TO_CELSIUS(tz->temperature));
1382         goto end;
1383
1384 remove_fs:
1385         acpi_thermal_remove_fs(device);
1386 unregister_thermal_zone:
1387         thermal_zone_device_unregister(tz->thermal_zone);
1388 free_memory:
1389         kfree(tz);
1390 end:
1391         return result;
1392 }
1393
1394 static int acpi_thermal_remove(struct acpi_device *device, int type)
1395 {
1396         acpi_status status = AE_OK;
1397         struct acpi_thermal *tz = NULL;
1398
1399         if (!device || !acpi_driver_data(device))
1400                 return -EINVAL;
1401
1402         tz = acpi_driver_data(device);
1403
1404         status = acpi_remove_notify_handler(device->handle,
1405                                             ACPI_DEVICE_NOTIFY,
1406                                             acpi_thermal_notify);
1407
1408         acpi_thermal_remove_fs(device);
1409         acpi_thermal_unregister_thermal_zone(tz);
1410         mutex_destroy(&tz->lock);
1411         kfree(tz);
1412         return 0;
1413 }
1414
1415 static int acpi_thermal_resume(struct acpi_device *device)
1416 {
1417         struct acpi_thermal *tz = NULL;
1418         int i, j, power_state, result;
1419
1420
1421         if (!device || !acpi_driver_data(device))
1422                 return -EINVAL;
1423
1424         tz = acpi_driver_data(device);
1425
1426         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1427                 if (!(&tz->trips.active[i]))
1428                         break;
1429                 if (!tz->trips.active[i].flags.valid)
1430                         break;
1431                 tz->trips.active[i].flags.enabled = 1;
1432                 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1433                         result = acpi_bus_get_power(tz->trips.active[i].devices.
1434                             handles[j], &power_state);
1435                         if (result || (power_state != ACPI_STATE_D0)) {
1436                                 tz->trips.active[i].flags.enabled = 0;
1437                                 break;
1438                         }
1439                 }
1440                 tz->state.active |= tz->trips.active[i].flags.enabled;
1441         }
1442
1443         acpi_thermal_check(tz);
1444
1445         return AE_OK;
1446 }
1447
1448 static int thermal_act(const struct dmi_system_id *d) {
1449
1450         if (act == 0) {
1451                 printk(KERN_NOTICE "ACPI: %s detected: "
1452                         "disabling all active thermal trip points\n", d->ident);
1453                 act = -1;
1454         }
1455         return 0;
1456 }
1457 static int thermal_nocrt(const struct dmi_system_id *d) {
1458
1459         printk(KERN_NOTICE "ACPI: %s detected: "
1460                 "disabling all critical thermal trip point actions.\n", d->ident);
1461         nocrt = 1;
1462         return 0;
1463 }
1464 static int thermal_tzp(const struct dmi_system_id *d) {
1465
1466         if (tzp == 0) {
1467                 printk(KERN_NOTICE "ACPI: %s detected: "
1468                         "enabling thermal zone polling\n", d->ident);
1469                 tzp = 300;      /* 300 dS = 30 Seconds */
1470         }
1471         return 0;
1472 }
1473 static int thermal_psv(const struct dmi_system_id *d) {
1474
1475         if (psv == 0) {
1476                 printk(KERN_NOTICE "ACPI: %s detected: "
1477                         "disabling all passive thermal trip points\n", d->ident);
1478                 psv = -1;
1479         }
1480         return 0;
1481 }
1482
1483 static struct dmi_system_id thermal_dmi_table[] __initdata = {
1484         /*
1485          * Award BIOS on this AOpen makes thermal control almost worthless.
1486          * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1487          */
1488         {
1489          .callback = thermal_act,
1490          .ident = "AOpen i915GMm-HFS",
1491          .matches = {
1492                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1493                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1494                 },
1495         },
1496         {
1497          .callback = thermal_psv,
1498          .ident = "AOpen i915GMm-HFS",
1499          .matches = {
1500                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1501                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1502                 },
1503         },
1504         {
1505          .callback = thermal_tzp,
1506          .ident = "AOpen i915GMm-HFS",
1507          .matches = {
1508                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1509                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1510                 },
1511         },
1512         {
1513          .callback = thermal_nocrt,
1514          .ident = "Gigabyte GA-7ZX",
1515          .matches = {
1516                 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1517                 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1518                 },
1519         },
1520         {}
1521 };
1522
1523 static int __init acpi_thermal_init(void)
1524 {
1525         int result = 0;
1526
1527         dmi_check_system(thermal_dmi_table);
1528
1529         if (off) {
1530                 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1531                 return -ENODEV;
1532         }
1533         acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
1534         if (!acpi_thermal_dir)
1535                 return -ENODEV;
1536         acpi_thermal_dir->owner = THIS_MODULE;
1537
1538         result = acpi_bus_register_driver(&acpi_thermal_driver);
1539         if (result < 0) {
1540                 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1541                 return -ENODEV;
1542         }
1543
1544         return 0;
1545 }
1546
1547 static void __exit acpi_thermal_exit(void)
1548 {
1549
1550         acpi_bus_unregister_driver(&acpi_thermal_driver);
1551
1552         remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1553
1554         return;
1555 }
1556
1557 module_init(acpi_thermal_init);
1558 module_exit(acpi_thermal_exit);