ACPI: update thermal for bus_id removal
[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 <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 ACPI_THERMAL_CLASS              "thermal_zone"
51 #define ACPI_THERMAL_DEVICE_NAME        "Thermal Zone"
52 #define ACPI_THERMAL_FILE_STATE         "state"
53 #define ACPI_THERMAL_FILE_TEMPERATURE   "temperature"
54 #define ACPI_THERMAL_FILE_TRIP_POINTS   "trip_points"
55 #define ACPI_THERMAL_FILE_COOLING_MODE  "cooling_mode"
56 #define ACPI_THERMAL_FILE_POLLING_FREQ  "polling_frequency"
57 #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
58 #define ACPI_THERMAL_NOTIFY_THRESHOLDS  0x81
59 #define ACPI_THERMAL_NOTIFY_DEVICES     0x82
60 #define ACPI_THERMAL_NOTIFY_CRITICAL    0xF0
61 #define ACPI_THERMAL_NOTIFY_HOT         0xF1
62 #define ACPI_THERMAL_MODE_ACTIVE        0x00
63
64 #define ACPI_THERMAL_MAX_ACTIVE 10
65 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
66
67 #define _COMPONENT              ACPI_THERMAL_COMPONENT
68 ACPI_MODULE_NAME("thermal");
69
70 MODULE_AUTHOR("Paul Diefenbaugh");
71 MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
72 MODULE_LICENSE("GPL");
73
74 static int act;
75 module_param(act, int, 0644);
76 MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
77
78 static int crt;
79 module_param(crt, int, 0644);
80 MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
81
82 static int tzp;
83 module_param(tzp, int, 0444);
84 MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
85
86 static int nocrt;
87 module_param(nocrt, int, 0);
88 MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
89
90 static int off;
91 module_param(off, int, 0);
92 MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
93
94 static int psv;
95 module_param(psv, int, 0644);
96 MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
97
98 static int acpi_thermal_add(struct acpi_device *device);
99 static int acpi_thermal_remove(struct acpi_device *device, int type);
100 static int acpi_thermal_resume(struct acpi_device *device);
101 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
102 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
103 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
104 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
105 static ssize_t acpi_thermal_write_cooling_mode(struct file *,
106                                                const char __user *, size_t,
107                                                loff_t *);
108 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
109 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
110                                           size_t, loff_t *);
111
112 static const struct acpi_device_id  thermal_device_ids[] = {
113         {ACPI_THERMAL_HID, 0},
114         {"", 0},
115 };
116 MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
117
118 static struct acpi_driver acpi_thermal_driver = {
119         .name = "thermal",
120         .class = ACPI_THERMAL_CLASS,
121         .ids = thermal_device_ids,
122         .ops = {
123                 .add = acpi_thermal_add,
124                 .remove = acpi_thermal_remove,
125                 .resume = acpi_thermal_resume,
126                 },
127 };
128
129 struct acpi_thermal_state {
130         u8 critical:1;
131         u8 hot:1;
132         u8 passive:1;
133         u8 active:1;
134         u8 reserved:4;
135         int active_index;
136 };
137
138 struct acpi_thermal_state_flags {
139         u8 valid:1;
140         u8 enabled:1;
141         u8 reserved:6;
142 };
143
144 struct acpi_thermal_critical {
145         struct acpi_thermal_state_flags flags;
146         unsigned long temperature;
147 };
148
149 struct acpi_thermal_hot {
150         struct acpi_thermal_state_flags flags;
151         unsigned long temperature;
152 };
153
154 struct acpi_thermal_passive {
155         struct acpi_thermal_state_flags flags;
156         unsigned long temperature;
157         unsigned long tc1;
158         unsigned long tc2;
159         unsigned long tsp;
160         struct acpi_handle_list devices;
161 };
162
163 struct acpi_thermal_active {
164         struct acpi_thermal_state_flags flags;
165         unsigned long temperature;
166         struct acpi_handle_list devices;
167 };
168
169 struct acpi_thermal_trips {
170         struct acpi_thermal_critical critical;
171         struct acpi_thermal_hot hot;
172         struct acpi_thermal_passive passive;
173         struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
174 };
175
176 struct acpi_thermal_flags {
177         u8 cooling_mode:1;      /* _SCP */
178         u8 devices:1;           /* _TZD */
179         u8 reserved:6;
180 };
181
182 struct acpi_thermal {
183         struct acpi_device * device;
184         acpi_bus_id name;
185         unsigned long temperature;
186         unsigned long last_temperature;
187         unsigned long polling_frequency;
188         volatile u8 zombie;
189         struct acpi_thermal_flags flags;
190         struct acpi_thermal_state state;
191         struct acpi_thermal_trips trips;
192         struct acpi_handle_list devices;
193         struct thermal_zone_device *thermal_zone;
194         int tz_enabled;
195         struct mutex lock;
196 };
197
198 static const struct file_operations acpi_thermal_state_fops = {
199         .owner = THIS_MODULE,
200         .open = acpi_thermal_state_open_fs,
201         .read = seq_read,
202         .llseek = seq_lseek,
203         .release = single_release,
204 };
205
206 static const struct file_operations acpi_thermal_temp_fops = {
207         .owner = THIS_MODULE,
208         .open = acpi_thermal_temp_open_fs,
209         .read = seq_read,
210         .llseek = seq_lseek,
211         .release = single_release,
212 };
213
214 static const struct file_operations acpi_thermal_trip_fops = {
215         .owner = THIS_MODULE,
216         .open = acpi_thermal_trip_open_fs,
217         .read = seq_read,
218         .llseek = seq_lseek,
219         .release = single_release,
220 };
221
222 static const struct file_operations acpi_thermal_cooling_fops = {
223         .owner = THIS_MODULE,
224         .open = acpi_thermal_cooling_open_fs,
225         .read = seq_read,
226         .write = acpi_thermal_write_cooling_mode,
227         .llseek = seq_lseek,
228         .release = single_release,
229 };
230
231 static const struct file_operations acpi_thermal_polling_fops = {
232         .owner = THIS_MODULE,
233         .open = acpi_thermal_polling_open_fs,
234         .read = seq_read,
235         .write = acpi_thermal_write_polling,
236         .llseek = seq_lseek,
237         .release = single_release,
238 };
239
240 /* --------------------------------------------------------------------------
241                              Thermal Zone Management
242    -------------------------------------------------------------------------- */
243
244 static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
245 {
246         acpi_status status = AE_OK;
247         unsigned long long tmp;
248
249         if (!tz)
250                 return -EINVAL;
251
252         tz->last_temperature = tz->temperature;
253
254         status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
255         if (ACPI_FAILURE(status))
256                 return -ENODEV;
257
258         tz->temperature = tmp;
259         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
260                           tz->temperature));
261
262         return 0;
263 }
264
265 static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
266 {
267         acpi_status status = AE_OK;
268         unsigned long long tmp;
269
270         if (!tz)
271                 return -EINVAL;
272
273         status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
274         if (ACPI_FAILURE(status))
275                 return -ENODEV;
276
277         tz->polling_frequency = tmp;
278         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
279                           tz->polling_frequency));
280
281         return 0;
282 }
283
284 static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
285 {
286
287         if (!tz)
288                 return -EINVAL;
289
290         tz->polling_frequency = seconds * 10;   /* Convert value to deci-seconds */
291
292         tz->thermal_zone->polling_delay = seconds * 1000;
293
294         if (tz->tz_enabled)
295                 thermal_zone_device_update(tz->thermal_zone);
296
297         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
298                           "Polling frequency set to %lu seconds\n",
299                           tz->polling_frequency/10));
300
301         return 0;
302 }
303
304 static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
305 {
306         acpi_status status = AE_OK;
307         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
308         struct acpi_object_list arg_list = { 1, &arg0 };
309         acpi_handle handle = NULL;
310
311
312         if (!tz)
313                 return -EINVAL;
314
315         status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
316         if (ACPI_FAILURE(status)) {
317                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
318                 return -ENODEV;
319         }
320
321         arg0.integer.value = mode;
322
323         status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
324         if (ACPI_FAILURE(status))
325                 return -ENODEV;
326
327         return 0;
328 }
329
330 #define ACPI_TRIPS_CRITICAL     0x01
331 #define ACPI_TRIPS_HOT          0x02
332 #define ACPI_TRIPS_PASSIVE      0x04
333 #define ACPI_TRIPS_ACTIVE       0x08
334 #define ACPI_TRIPS_DEVICES      0x10
335
336 #define ACPI_TRIPS_REFRESH_THRESHOLDS   (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
337 #define ACPI_TRIPS_REFRESH_DEVICES      ACPI_TRIPS_DEVICES
338
339 #define ACPI_TRIPS_INIT      (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT |    \
340                               ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE |  \
341                               ACPI_TRIPS_DEVICES)
342
343 /*
344  * This exception is thrown out in two cases:
345  * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
346  *   when re-evaluating the AML code.
347  * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
348  *   We need to re-bind the cooling devices of a thermal zone when this occurs.
349  */
350 #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str)        \
351 do {    \
352         if (flags != ACPI_TRIPS_INIT)   \
353                 ACPI_EXCEPTION((AE_INFO, AE_ERROR,      \
354                 "ACPI thermal trip point %s changed\n"  \
355                 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
356 } while (0)
357
358 static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
359 {
360         acpi_status status = AE_OK;
361         unsigned long long tmp;
362         struct acpi_handle_list devices;
363         int valid = 0;
364         int i;
365
366         /* Critical Shutdown (required) */
367         if (flag & ACPI_TRIPS_CRITICAL) {
368                 status = acpi_evaluate_integer(tz->device->handle,
369                                 "_CRT", NULL, &tmp);
370                 tz->trips.critical.temperature = tmp;
371                 /*
372                  * Treat freezing temperatures as invalid as well; some
373                  * BIOSes return really low values and cause reboots at startup.
374                  * Below zero (Celcius) values clearly aren't right for sure..
375                  * ... so lets discard those as invalid.
376                  */
377                 if (ACPI_FAILURE(status) ||
378                                 tz->trips.critical.temperature <= 2732) {
379                         tz->trips.critical.flags.valid = 0;
380                         ACPI_EXCEPTION((AE_INFO, status,
381                                         "No or invalid critical threshold"));
382                         return -ENODEV;
383                 } else {
384                         tz->trips.critical.flags.valid = 1;
385                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
386                                         "Found critical threshold [%lu]\n",
387                                         tz->trips.critical.temperature));
388                 }
389                 if (tz->trips.critical.flags.valid == 1) {
390                         if (crt == -1) {
391                                 tz->trips.critical.flags.valid = 0;
392                         } else if (crt > 0) {
393                                 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
394                                 /*
395                                  * Allow override critical threshold
396                                  */
397                                 if (crt_k > tz->trips.critical.temperature)
398                                         printk(KERN_WARNING PREFIX
399                                                 "Critical threshold %d C\n", crt);
400                                 tz->trips.critical.temperature = crt_k;
401                         }
402                 }
403         }
404
405         /* Critical Sleep (optional) */
406         if (flag & ACPI_TRIPS_HOT) {
407                 status = acpi_evaluate_integer(tz->device->handle,
408                                 "_HOT", NULL, &tmp);
409                 if (ACPI_FAILURE(status)) {
410                         tz->trips.hot.flags.valid = 0;
411                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
412                                         "No hot threshold\n"));
413                 } else {
414                         tz->trips.hot.temperature = tmp;
415                         tz->trips.hot.flags.valid = 1;
416                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
417                                         "Found hot threshold [%lu]\n",
418                                         tz->trips.critical.temperature));
419                 }
420         }
421
422         /* Passive (optional) */
423         if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
424                 (flag == ACPI_TRIPS_INIT)) {
425                 valid = tz->trips.passive.flags.valid;
426                 if (psv == -1) {
427                         status = AE_SUPPORT;
428                 } else if (psv > 0) {
429                         tmp = CELSIUS_TO_KELVIN(psv);
430                         status = AE_OK;
431                 } else {
432                         status = acpi_evaluate_integer(tz->device->handle,
433                                 "_PSV", NULL, &tmp);
434                 }
435
436                 if (ACPI_FAILURE(status))
437                         tz->trips.passive.flags.valid = 0;
438                 else {
439                         tz->trips.passive.temperature = tmp;
440                         tz->trips.passive.flags.valid = 1;
441                         if (flag == ACPI_TRIPS_INIT) {
442                                 status = acpi_evaluate_integer(
443                                                 tz->device->handle, "_TC1",
444                                                 NULL, &tmp);
445                                 if (ACPI_FAILURE(status))
446                                         tz->trips.passive.flags.valid = 0;
447                                 else
448                                         tz->trips.passive.tc1 = tmp;
449                                 status = acpi_evaluate_integer(
450                                                 tz->device->handle, "_TC2",
451                                                 NULL, &tmp);
452                                 if (ACPI_FAILURE(status))
453                                         tz->trips.passive.flags.valid = 0;
454                                 else
455                                         tz->trips.passive.tc2 = tmp;
456                                 status = acpi_evaluate_integer(
457                                                 tz->device->handle, "_TSP",
458                                                 NULL, &tmp);
459                                 if (ACPI_FAILURE(status))
460                                         tz->trips.passive.flags.valid = 0;
461                                 else
462                                         tz->trips.passive.tsp = tmp;
463                         }
464                 }
465         }
466         if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
467                 memset(&devices, 0, sizeof(struct acpi_handle_list));
468                 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
469                                                         NULL, &devices);
470                 if (ACPI_FAILURE(status)) {
471                         printk(KERN_WARNING PREFIX
472                                 "Invalid passive threshold\n");
473                         tz->trips.passive.flags.valid = 0;
474                 }
475                 else
476                         tz->trips.passive.flags.valid = 1;
477
478                 if (memcmp(&tz->trips.passive.devices, &devices,
479                                 sizeof(struct acpi_handle_list))) {
480                         memcpy(&tz->trips.passive.devices, &devices,
481                                 sizeof(struct acpi_handle_list));
482                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
483                 }
484         }
485         if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
486                 if (valid != tz->trips.passive.flags.valid)
487                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
488         }
489
490         /* Active (optional) */
491         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
492                 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
493                 valid = tz->trips.active[i].flags.valid;
494
495                 if (act == -1)
496                         break; /* disable all active trip points */
497
498                 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
499                         tz->trips.active[i].flags.valid)) {
500                         status = acpi_evaluate_integer(tz->device->handle,
501                                                         name, NULL, &tmp);
502                         if (ACPI_FAILURE(status)) {
503                                 tz->trips.active[i].flags.valid = 0;
504                                 if (i == 0)
505                                         break;
506                                 if (act <= 0)
507                                         break;
508                                 if (i == 1)
509                                         tz->trips.active[0].temperature =
510                                                 CELSIUS_TO_KELVIN(act);
511                                 else
512                                         /*
513                                          * Don't allow override higher than
514                                          * the next higher trip point
515                                          */
516                                         tz->trips.active[i - 1].temperature =
517                                                 (tz->trips.active[i - 2].temperature <
518                                                 CELSIUS_TO_KELVIN(act) ?
519                                                 tz->trips.active[i - 2].temperature :
520                                                 CELSIUS_TO_KELVIN(act));
521                                 break;
522                         } else {
523                                 tz->trips.active[i].temperature = tmp;
524                                 tz->trips.active[i].flags.valid = 1;
525                         }
526                 }
527
528                 name[2] = 'L';
529                 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
530                         memset(&devices, 0, sizeof(struct acpi_handle_list));
531                         status = acpi_evaluate_reference(tz->device->handle,
532                                                 name, NULL, &devices);
533                         if (ACPI_FAILURE(status)) {
534                                 printk(KERN_WARNING PREFIX
535                                         "Invalid active%d threshold\n", i);
536                                 tz->trips.active[i].flags.valid = 0;
537                         }
538                         else
539                                 tz->trips.active[i].flags.valid = 1;
540
541                         if (memcmp(&tz->trips.active[i].devices, &devices,
542                                         sizeof(struct acpi_handle_list))) {
543                                 memcpy(&tz->trips.active[i].devices, &devices,
544                                         sizeof(struct acpi_handle_list));
545                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
546                         }
547                 }
548                 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
549                         if (valid != tz->trips.active[i].flags.valid)
550                                 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
551
552                 if (!tz->trips.active[i].flags.valid)
553                         break;
554         }
555
556         if (flag & ACPI_TRIPS_DEVICES) {
557                 memset(&devices, 0, sizeof(struct acpi_handle_list));
558                 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
559                                                 NULL, &devices);
560                 if (memcmp(&tz->devices, &devices,
561                                 sizeof(struct acpi_handle_list))) {
562                         memcpy(&tz->devices, &devices,
563                                 sizeof(struct acpi_handle_list));
564                         ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
565                 }
566         }
567
568         return 0;
569 }
570
571 static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
572 {
573         return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
574 }
575
576 static void acpi_thermal_check(void *data)
577 {
578         struct acpi_thermal *tz = data;
579
580         thermal_zone_device_update(tz->thermal_zone);
581 }
582
583 /* sys I/F for generic thermal sysfs support */
584 #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
585
586 static int thermal_get_temp(struct thermal_zone_device *thermal,
587                             unsigned long *temp)
588 {
589         struct acpi_thermal *tz = thermal->devdata;
590         int result;
591
592         if (!tz)
593                 return -EINVAL;
594
595         result = acpi_thermal_get_temperature(tz);
596         if (result)
597                 return result;
598
599         *temp = KELVIN_TO_MILLICELSIUS(tz->temperature);
600         return 0;
601 }
602
603 static const char enabled[] = "kernel";
604 static const char disabled[] = "user";
605 static int thermal_get_mode(struct thermal_zone_device *thermal,
606                                 enum thermal_device_mode *mode)
607 {
608         struct acpi_thermal *tz = thermal->devdata;
609
610         if (!tz)
611                 return -EINVAL;
612
613         *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
614                 THERMAL_DEVICE_DISABLED;
615
616         return 0;
617 }
618
619 static int thermal_set_mode(struct thermal_zone_device *thermal,
620                                 enum thermal_device_mode mode)
621 {
622         struct acpi_thermal *tz = thermal->devdata;
623         int enable;
624
625         if (!tz)
626                 return -EINVAL;
627
628         /*
629          * enable/disable thermal management from ACPI thermal driver
630          */
631         if (mode == THERMAL_DEVICE_ENABLED)
632                 enable = 1;
633         else if (mode == THERMAL_DEVICE_DISABLED)
634                 enable = 0;
635         else
636                 return -EINVAL;
637
638         if (enable != tz->tz_enabled) {
639                 tz->tz_enabled = enable;
640                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
641                         "%s ACPI thermal control\n",
642                         tz->tz_enabled ? enabled : disabled));
643                 acpi_thermal_check(tz);
644         }
645         return 0;
646 }
647
648 static int thermal_get_trip_type(struct thermal_zone_device *thermal,
649                                  int trip, enum thermal_trip_type *type)
650 {
651         struct acpi_thermal *tz = thermal->devdata;
652         int i;
653
654         if (!tz || trip < 0)
655                 return -EINVAL;
656
657         if (tz->trips.critical.flags.valid) {
658                 if (!trip) {
659                         *type = THERMAL_TRIP_CRITICAL;
660                         return 0;
661                 }
662                 trip--;
663         }
664
665         if (tz->trips.hot.flags.valid) {
666                 if (!trip) {
667                         *type = THERMAL_TRIP_HOT;
668                         return 0;
669                 }
670                 trip--;
671         }
672
673         if (tz->trips.passive.flags.valid) {
674                 if (!trip) {
675                         *type = THERMAL_TRIP_PASSIVE;
676                         return 0;
677                 }
678                 trip--;
679         }
680
681         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
682                 tz->trips.active[i].flags.valid; i++) {
683                 if (!trip) {
684                         *type = THERMAL_TRIP_ACTIVE;
685                         return 0;
686                 }
687                 trip--;
688         }
689
690         return -EINVAL;
691 }
692
693 static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
694                                  int trip, unsigned long *temp)
695 {
696         struct acpi_thermal *tz = thermal->devdata;
697         int i;
698
699         if (!tz || trip < 0)
700                 return -EINVAL;
701
702         if (tz->trips.critical.flags.valid) {
703                 if (!trip) {
704                         *temp = KELVIN_TO_MILLICELSIUS(
705                                 tz->trips.critical.temperature);
706                         return 0;
707                 }
708                 trip--;
709         }
710
711         if (tz->trips.hot.flags.valid) {
712                 if (!trip) {
713                         *temp = KELVIN_TO_MILLICELSIUS(
714                                 tz->trips.hot.temperature);
715                         return 0;
716                 }
717                 trip--;
718         }
719
720         if (tz->trips.passive.flags.valid) {
721                 if (!trip) {
722                         *temp = KELVIN_TO_MILLICELSIUS(
723                                 tz->trips.passive.temperature);
724                         return 0;
725                 }
726                 trip--;
727         }
728
729         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
730                 tz->trips.active[i].flags.valid; i++) {
731                 if (!trip) {
732                         *temp = KELVIN_TO_MILLICELSIUS(
733                                 tz->trips.active[i].temperature);
734                         return 0;
735                 }
736                 trip--;
737         }
738
739         return -EINVAL;
740 }
741
742 static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
743                                 unsigned long *temperature) {
744         struct acpi_thermal *tz = thermal->devdata;
745
746         if (tz->trips.critical.flags.valid) {
747                 *temperature = KELVIN_TO_MILLICELSIUS(
748                                 tz->trips.critical.temperature);
749                 return 0;
750         } else
751                 return -EINVAL;
752 }
753
754 static int thermal_notify(struct thermal_zone_device *thermal, int trip,
755                            enum thermal_trip_type trip_type)
756 {
757         u8 type = 0;
758         struct acpi_thermal *tz = thermal->devdata;
759
760         if (trip_type == THERMAL_TRIP_CRITICAL)
761                 type = ACPI_THERMAL_NOTIFY_CRITICAL;
762         else if (trip_type == THERMAL_TRIP_HOT)
763                 type = ACPI_THERMAL_NOTIFY_HOT;
764         else
765                 return 0;
766
767         acpi_bus_generate_proc_event(tz->device, type, 1);
768         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
769                                         dev_name(&tz->device->dev), type, 1);
770
771         if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
772                 return 1;
773
774         return 0;
775 }
776
777 typedef int (*cb)(struct thermal_zone_device *, int,
778                   struct thermal_cooling_device *);
779 static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
780                                         struct thermal_cooling_device *cdev,
781                                         cb action)
782 {
783         struct acpi_device *device = cdev->devdata;
784         struct acpi_thermal *tz = thermal->devdata;
785         struct acpi_device *dev;
786         acpi_status status;
787         acpi_handle handle;
788         int i;
789         int j;
790         int trip = -1;
791         int result = 0;
792
793         if (tz->trips.critical.flags.valid)
794                 trip++;
795
796         if (tz->trips.hot.flags.valid)
797                 trip++;
798
799         if (tz->trips.passive.flags.valid) {
800                 trip++;
801                 for (i = 0; i < tz->trips.passive.devices.count;
802                     i++) {
803                         handle = tz->trips.passive.devices.handles[i];
804                         status = acpi_bus_get_device(handle, &dev);
805                         if (ACPI_SUCCESS(status) && (dev == device)) {
806                                 result = action(thermal, trip, cdev);
807                                 if (result)
808                                         goto failed;
809                         }
810                 }
811         }
812
813         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
814                 if (!tz->trips.active[i].flags.valid)
815                         break;
816                 trip++;
817                 for (j = 0;
818                     j < tz->trips.active[i].devices.count;
819                     j++) {
820                         handle = tz->trips.active[i].devices.handles[j];
821                         status = acpi_bus_get_device(handle, &dev);
822                         if (ACPI_SUCCESS(status) && (dev == device)) {
823                                 result = action(thermal, trip, cdev);
824                                 if (result)
825                                         goto failed;
826                         }
827                 }
828         }
829
830         for (i = 0; i < tz->devices.count; i++) {
831                 handle = tz->devices.handles[i];
832                 status = acpi_bus_get_device(handle, &dev);
833                 if (ACPI_SUCCESS(status) && (dev == device)) {
834                         result = action(thermal, -1, cdev);
835                         if (result)
836                                 goto failed;
837                 }
838         }
839
840 failed:
841         return result;
842 }
843
844 static int
845 acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
846                                         struct thermal_cooling_device *cdev)
847 {
848         return acpi_thermal_cooling_device_cb(thermal, cdev,
849                                 thermal_zone_bind_cooling_device);
850 }
851
852 static int
853 acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
854                                         struct thermal_cooling_device *cdev)
855 {
856         return acpi_thermal_cooling_device_cb(thermal, cdev,
857                                 thermal_zone_unbind_cooling_device);
858 }
859
860 static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
861         .bind = acpi_thermal_bind_cooling_device,
862         .unbind = acpi_thermal_unbind_cooling_device,
863         .get_temp = thermal_get_temp,
864         .get_mode = thermal_get_mode,
865         .set_mode = thermal_set_mode,
866         .get_trip_type = thermal_get_trip_type,
867         .get_trip_temp = thermal_get_trip_temp,
868         .get_crit_temp = thermal_get_crit_temp,
869         .notify = thermal_notify,
870 };
871
872 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
873 {
874         int trips = 0;
875         int result;
876         acpi_status status;
877         int i;
878
879         if (tz->trips.critical.flags.valid)
880                 trips++;
881
882         if (tz->trips.hot.flags.valid)
883                 trips++;
884
885         if (tz->trips.passive.flags.valid)
886                 trips++;
887
888         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
889                         tz->trips.active[i].flags.valid; i++, trips++);
890
891         if (tz->trips.passive.flags.valid)
892                 tz->thermal_zone =
893                         thermal_zone_device_register("acpitz", trips, tz,
894                                                      &acpi_thermal_zone_ops,
895                                                      tz->trips.passive.tc1,
896                                                      tz->trips.passive.tc2,
897                                                      tz->trips.passive.tsp*100,
898                                                      tz->polling_frequency*100);
899         else
900                 tz->thermal_zone =
901                         thermal_zone_device_register("acpitz", trips, tz,
902                                                      &acpi_thermal_zone_ops,
903                                                      0, 0, 0,
904                                                      tz->polling_frequency);
905         if (IS_ERR(tz->thermal_zone))
906                 return -ENODEV;
907
908         result = sysfs_create_link(&tz->device->dev.kobj,
909                                    &tz->thermal_zone->device.kobj, "thermal_zone");
910         if (result)
911                 return result;
912
913         result = sysfs_create_link(&tz->thermal_zone->device.kobj,
914                                    &tz->device->dev.kobj, "device");
915         if (result)
916                 return result;
917
918         status = acpi_attach_data(tz->device->handle,
919                                   acpi_bus_private_data_handler,
920                                   tz->thermal_zone);
921         if (ACPI_FAILURE(status)) {
922                 printk(KERN_ERR PREFIX
923                                 "Error attaching device data\n");
924                 return -ENODEV;
925         }
926
927         tz->tz_enabled = 1;
928
929         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
930                  tz->thermal_zone->id);
931         return 0;
932 }
933
934 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
935 {
936         sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
937         sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
938         thermal_zone_device_unregister(tz->thermal_zone);
939         tz->thermal_zone = NULL;
940         acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
941 }
942
943
944 /* --------------------------------------------------------------------------
945                               FS Interface (/proc)
946    -------------------------------------------------------------------------- */
947
948 static struct proc_dir_entry *acpi_thermal_dir;
949
950 static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
951 {
952         struct acpi_thermal *tz = seq->private;
953
954
955         if (!tz)
956                 goto end;
957
958         seq_puts(seq, "state:                   ");
959
960         if (!tz->state.critical && !tz->state.hot && !tz->state.passive
961             && !tz->state.active)
962                 seq_puts(seq, "ok\n");
963         else {
964                 if (tz->state.critical)
965                         seq_puts(seq, "critical ");
966                 if (tz->state.hot)
967                         seq_puts(seq, "hot ");
968                 if (tz->state.passive)
969                         seq_puts(seq, "passive ");
970                 if (tz->state.active)
971                         seq_printf(seq, "active[%d]", tz->state.active_index);
972                 seq_puts(seq, "\n");
973         }
974
975       end:
976         return 0;
977 }
978
979 static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
980 {
981         return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
982 }
983
984 static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
985 {
986         int result = 0;
987         struct acpi_thermal *tz = seq->private;
988
989
990         if (!tz)
991                 goto end;
992
993         result = acpi_thermal_get_temperature(tz);
994         if (result)
995                 goto end;
996
997         seq_printf(seq, "temperature:             %ld C\n",
998                    KELVIN_TO_CELSIUS(tz->temperature));
999
1000       end:
1001         return 0;
1002 }
1003
1004 static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
1005 {
1006         return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
1007 }
1008
1009 static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
1010 {
1011         struct acpi_thermal *tz = seq->private;
1012         struct acpi_device *device;
1013         acpi_status status;
1014
1015         int i = 0;
1016         int j = 0;
1017
1018
1019         if (!tz)
1020                 goto end;
1021
1022         if (tz->trips.critical.flags.valid)
1023                 seq_printf(seq, "critical (S5):           %ld C%s",
1024                            KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
1025                            nocrt ? " <disabled>\n" : "\n");
1026
1027         if (tz->trips.hot.flags.valid)
1028                 seq_printf(seq, "hot (S4):                %ld C%s",
1029                            KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
1030                            nocrt ? " <disabled>\n" : "\n");
1031
1032         if (tz->trips.passive.flags.valid) {
1033                 seq_printf(seq,
1034                            "passive:                 %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
1035                            KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
1036                            tz->trips.passive.tc1, tz->trips.passive.tc2,
1037                            tz->trips.passive.tsp);
1038                 for (j = 0; j < tz->trips.passive.devices.count; j++) {
1039                         status = acpi_bus_get_device(tz->trips.passive.devices.
1040                                                      handles[j], &device);
1041                         seq_printf(seq, "%4.4s ", status ? "" :
1042                                    acpi_device_bid(device));
1043                 }
1044                 seq_puts(seq, "\n");
1045         }
1046
1047         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1048                 if (!(tz->trips.active[i].flags.valid))
1049                         break;
1050                 seq_printf(seq, "active[%d]:               %ld C: devices=",
1051                            i,
1052                            KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
1053                 for (j = 0; j < tz->trips.active[i].devices.count; j++){
1054                         status = acpi_bus_get_device(tz->trips.active[i].
1055                                                      devices.handles[j],
1056                                                      &device);
1057                         seq_printf(seq, "%4.4s ", status ? "" :
1058                                    acpi_device_bid(device));
1059                 }
1060                 seq_puts(seq, "\n");
1061         }
1062
1063       end:
1064         return 0;
1065 }
1066
1067 static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
1068 {
1069         return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
1070 }
1071
1072 static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
1073 {
1074         struct acpi_thermal *tz = seq->private;
1075
1076
1077         if (!tz)
1078                 goto end;
1079
1080         if (!tz->flags.cooling_mode)
1081                 seq_puts(seq, "<setting not supported>\n");
1082         else
1083                 seq_puts(seq, "0 - Active; 1 - Passive\n");
1084
1085       end:
1086         return 0;
1087 }
1088
1089 static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
1090 {
1091         return single_open(file, acpi_thermal_cooling_seq_show,
1092                            PDE(inode)->data);
1093 }
1094
1095 static ssize_t
1096 acpi_thermal_write_cooling_mode(struct file *file,
1097                                 const char __user * buffer,
1098                                 size_t count, loff_t * ppos)
1099 {
1100         struct seq_file *m = file->private_data;
1101         struct acpi_thermal *tz = m->private;
1102         int result = 0;
1103         char mode_string[12] = { '\0' };
1104
1105
1106         if (!tz || (count > sizeof(mode_string) - 1))
1107                 return -EINVAL;
1108
1109         if (!tz->flags.cooling_mode)
1110                 return -ENODEV;
1111
1112         if (copy_from_user(mode_string, buffer, count))
1113                 return -EFAULT;
1114
1115         mode_string[count] = '\0';
1116
1117         result = acpi_thermal_set_cooling_mode(tz,
1118                                                simple_strtoul(mode_string, NULL,
1119                                                               0));
1120         if (result)
1121                 return result;
1122
1123         acpi_thermal_check(tz);
1124
1125         return count;
1126 }
1127
1128 static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
1129 {
1130         struct acpi_thermal *tz = seq->private;
1131
1132
1133         if (!tz)
1134                 goto end;
1135
1136         if (!tz->thermal_zone->polling_delay) {
1137                 seq_puts(seq, "<polling disabled>\n");
1138                 goto end;
1139         }
1140
1141         seq_printf(seq, "polling frequency:       %d seconds\n",
1142                    (tz->thermal_zone->polling_delay / 1000));
1143
1144       end:
1145         return 0;
1146 }
1147
1148 static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
1149 {
1150         return single_open(file, acpi_thermal_polling_seq_show,
1151                            PDE(inode)->data);
1152 }
1153
1154 static ssize_t
1155 acpi_thermal_write_polling(struct file *file,
1156                            const char __user * buffer,
1157                            size_t count, loff_t * ppos)
1158 {
1159         struct seq_file *m = file->private_data;
1160         struct acpi_thermal *tz = m->private;
1161         int result = 0;
1162         char polling_string[12] = { '\0' };
1163         int seconds = 0;
1164
1165
1166         if (!tz || (count > sizeof(polling_string) - 1))
1167                 return -EINVAL;
1168
1169         if (copy_from_user(polling_string, buffer, count))
1170                 return -EFAULT;
1171
1172         polling_string[count] = '\0';
1173
1174         seconds = simple_strtoul(polling_string, NULL, 0);
1175
1176         result = acpi_thermal_set_polling(tz, seconds);
1177         if (result)
1178                 return result;
1179
1180         acpi_thermal_check(tz);
1181
1182         return count;
1183 }
1184
1185 static int acpi_thermal_add_fs(struct acpi_device *device)
1186 {
1187         struct proc_dir_entry *entry = NULL;
1188
1189
1190         if (!acpi_device_dir(device)) {
1191                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1192                                                      acpi_thermal_dir);
1193                 if (!acpi_device_dir(device))
1194                         return -ENODEV;
1195                 acpi_device_dir(device)->owner = THIS_MODULE;
1196         }
1197
1198         /* 'state' [R] */
1199         entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
1200                                  S_IRUGO, acpi_device_dir(device),
1201                                  &acpi_thermal_state_fops,
1202                                  acpi_driver_data(device));
1203         if (!entry)
1204                 return -ENODEV;
1205
1206         /* 'temperature' [R] */
1207         entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
1208                                  S_IRUGO, acpi_device_dir(device),
1209                                  &acpi_thermal_temp_fops,
1210                                  acpi_driver_data(device));
1211         if (!entry)
1212                 return -ENODEV;
1213
1214         /* 'trip_points' [R] */
1215         entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
1216                                  S_IRUGO,
1217                                  acpi_device_dir(device),
1218                                  &acpi_thermal_trip_fops,
1219                                  acpi_driver_data(device));
1220         if (!entry)
1221                 return -ENODEV;
1222
1223         /* 'cooling_mode' [R/W] */
1224         entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
1225                                  S_IFREG | S_IRUGO | S_IWUSR,
1226                                  acpi_device_dir(device),
1227                                  &acpi_thermal_cooling_fops,
1228                                  acpi_driver_data(device));
1229         if (!entry)
1230                 return -ENODEV;
1231
1232         /* 'polling_frequency' [R/W] */
1233         entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
1234                                  S_IFREG | S_IRUGO | S_IWUSR,
1235                                  acpi_device_dir(device),
1236                                  &acpi_thermal_polling_fops,
1237                                  acpi_driver_data(device));
1238         if (!entry)
1239                 return -ENODEV;
1240         return 0;
1241 }
1242
1243 static int acpi_thermal_remove_fs(struct acpi_device *device)
1244 {
1245
1246         if (acpi_device_dir(device)) {
1247                 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
1248                                   acpi_device_dir(device));
1249                 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
1250                                   acpi_device_dir(device));
1251                 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
1252                                   acpi_device_dir(device));
1253                 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
1254                                   acpi_device_dir(device));
1255                 remove_proc_entry(ACPI_THERMAL_FILE_STATE,
1256                                   acpi_device_dir(device));
1257                 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
1258                 acpi_device_dir(device) = NULL;
1259         }
1260
1261         return 0;
1262 }
1263
1264 /* --------------------------------------------------------------------------
1265                                  Driver Interface
1266    -------------------------------------------------------------------------- */
1267
1268 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
1269 {
1270         struct acpi_thermal *tz = data;
1271         struct acpi_device *device = NULL;
1272
1273
1274         if (!tz)
1275                 return;
1276
1277         device = tz->device;
1278
1279         switch (event) {
1280         case ACPI_THERMAL_NOTIFY_TEMPERATURE:
1281                 acpi_thermal_check(tz);
1282                 break;
1283         case ACPI_THERMAL_NOTIFY_THRESHOLDS:
1284                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
1285                 acpi_thermal_check(tz);
1286                 acpi_bus_generate_proc_event(device, event, 0);
1287                 acpi_bus_generate_netlink_event(device->pnp.device_class,
1288                                                   dev_name(&device->dev), event, 0);
1289                 break;
1290         case ACPI_THERMAL_NOTIFY_DEVICES:
1291                 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
1292                 acpi_thermal_check(tz);
1293                 acpi_bus_generate_proc_event(device, event, 0);
1294                 acpi_bus_generate_netlink_event(device->pnp.device_class,
1295                                                   dev_name(&device->dev), event, 0);
1296                 break;
1297         default:
1298                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1299                                   "Unsupported event [0x%x]\n", event));
1300                 break;
1301         }
1302
1303         return;
1304 }
1305
1306 static int acpi_thermal_get_info(struct acpi_thermal *tz)
1307 {
1308         int result = 0;
1309
1310
1311         if (!tz)
1312                 return -EINVAL;
1313
1314         /* Get temperature [_TMP] (required) */
1315         result = acpi_thermal_get_temperature(tz);
1316         if (result)
1317                 return result;
1318
1319         /* Get trip points [_CRT, _PSV, etc.] (required) */
1320         result = acpi_thermal_get_trip_points(tz);
1321         if (result)
1322                 return result;
1323
1324         /* Set the cooling mode [_SCP] to active cooling (default) */
1325         result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
1326         if (!result)
1327                 tz->flags.cooling_mode = 1;
1328
1329         /* Get default polling frequency [_TZP] (optional) */
1330         if (tzp)
1331                 tz->polling_frequency = tzp;
1332         else
1333                 acpi_thermal_get_polling_frequency(tz);
1334
1335         return 0;
1336 }
1337
1338 static int acpi_thermal_add(struct acpi_device *device)
1339 {
1340         int result = 0;
1341         acpi_status status = AE_OK;
1342         struct acpi_thermal *tz = NULL;
1343
1344
1345         if (!device)
1346                 return -EINVAL;
1347
1348         tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
1349         if (!tz)
1350                 return -ENOMEM;
1351
1352         tz->device = device;
1353         strcpy(tz->name, device->pnp.bus_id);
1354         strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1355         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
1356         device->driver_data = tz;
1357         mutex_init(&tz->lock);
1358
1359
1360         result = acpi_thermal_get_info(tz);
1361         if (result)
1362                 goto free_memory;
1363
1364         result = acpi_thermal_register_thermal_zone(tz);
1365         if (result)
1366                 goto free_memory;
1367
1368         result = acpi_thermal_add_fs(device);
1369         if (result)
1370                 goto unregister_thermal_zone;
1371
1372         status = acpi_install_notify_handler(device->handle,
1373                                              ACPI_DEVICE_NOTIFY,
1374                                              acpi_thermal_notify, tz);
1375         if (ACPI_FAILURE(status)) {
1376                 result = -ENODEV;
1377                 goto remove_fs;
1378         }
1379
1380         printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
1381                acpi_device_name(device), acpi_device_bid(device),
1382                KELVIN_TO_CELSIUS(tz->temperature));
1383         goto end;
1384
1385 remove_fs:
1386         acpi_thermal_remove_fs(device);
1387 unregister_thermal_zone:
1388         thermal_zone_device_unregister(tz->thermal_zone);
1389 free_memory:
1390         kfree(tz);
1391 end:
1392         return result;
1393 }
1394
1395 static int acpi_thermal_remove(struct acpi_device *device, int type)
1396 {
1397         acpi_status status = AE_OK;
1398         struct acpi_thermal *tz = NULL;
1399
1400         if (!device || !acpi_driver_data(device))
1401                 return -EINVAL;
1402
1403         tz = acpi_driver_data(device);
1404
1405         status = acpi_remove_notify_handler(device->handle,
1406                                             ACPI_DEVICE_NOTIFY,
1407                                             acpi_thermal_notify);
1408
1409         acpi_thermal_remove_fs(device);
1410         acpi_thermal_unregister_thermal_zone(tz);
1411         mutex_destroy(&tz->lock);
1412         kfree(tz);
1413         return 0;
1414 }
1415
1416 static int acpi_thermal_resume(struct acpi_device *device)
1417 {
1418         struct acpi_thermal *tz = NULL;
1419         int i, j, power_state, result;
1420
1421
1422         if (!device || !acpi_driver_data(device))
1423                 return -EINVAL;
1424
1425         tz = acpi_driver_data(device);
1426
1427         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1428                 if (!(&tz->trips.active[i]))
1429                         break;
1430                 if (!tz->trips.active[i].flags.valid)
1431                         break;
1432                 tz->trips.active[i].flags.enabled = 1;
1433                 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1434                         result = acpi_bus_get_power(tz->trips.active[i].devices.
1435                             handles[j], &power_state);
1436                         if (result || (power_state != ACPI_STATE_D0)) {
1437                                 tz->trips.active[i].flags.enabled = 0;
1438                                 break;
1439                         }
1440                 }
1441                 tz->state.active |= tz->trips.active[i].flags.enabled;
1442         }
1443
1444         acpi_thermal_check(tz);
1445
1446         return AE_OK;
1447 }
1448
1449 static int thermal_act(const struct dmi_system_id *d) {
1450
1451         if (act == 0) {
1452                 printk(KERN_NOTICE "ACPI: %s detected: "
1453                         "disabling all active thermal trip points\n", d->ident);
1454                 act = -1;
1455         }
1456         return 0;
1457 }
1458 static int thermal_nocrt(const struct dmi_system_id *d) {
1459
1460         printk(KERN_NOTICE "ACPI: %s detected: "
1461                 "disabling all critical thermal trip point actions.\n", d->ident);
1462         nocrt = 1;
1463         return 0;
1464 }
1465 static int thermal_tzp(const struct dmi_system_id *d) {
1466
1467         if (tzp == 0) {
1468                 printk(KERN_NOTICE "ACPI: %s detected: "
1469                         "enabling thermal zone polling\n", d->ident);
1470                 tzp = 300;      /* 300 dS = 30 Seconds */
1471         }
1472         return 0;
1473 }
1474 static int thermal_psv(const struct dmi_system_id *d) {
1475
1476         if (psv == 0) {
1477                 printk(KERN_NOTICE "ACPI: %s detected: "
1478                         "disabling all passive thermal trip points\n", d->ident);
1479                 psv = -1;
1480         }
1481         return 0;
1482 }
1483
1484 static struct dmi_system_id thermal_dmi_table[] __initdata = {
1485         /*
1486          * Award BIOS on this AOpen makes thermal control almost worthless.
1487          * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1488          */
1489         {
1490          .callback = thermal_act,
1491          .ident = "AOpen i915GMm-HFS",
1492          .matches = {
1493                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1494                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1495                 },
1496         },
1497         {
1498          .callback = thermal_psv,
1499          .ident = "AOpen i915GMm-HFS",
1500          .matches = {
1501                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1502                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1503                 },
1504         },
1505         {
1506          .callback = thermal_tzp,
1507          .ident = "AOpen i915GMm-HFS",
1508          .matches = {
1509                 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1510                 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1511                 },
1512         },
1513         {
1514          .callback = thermal_nocrt,
1515          .ident = "Gigabyte GA-7ZX",
1516          .matches = {
1517                 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1518                 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1519                 },
1520         },
1521         {}
1522 };
1523
1524 static int __init acpi_thermal_init(void)
1525 {
1526         int result = 0;
1527
1528         dmi_check_system(thermal_dmi_table);
1529
1530         if (off) {
1531                 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1532                 return -ENODEV;
1533         }
1534         acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
1535         if (!acpi_thermal_dir)
1536                 return -ENODEV;
1537         acpi_thermal_dir->owner = THIS_MODULE;
1538
1539         result = acpi_bus_register_driver(&acpi_thermal_driver);
1540         if (result < 0) {
1541                 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1542                 return -ENODEV;
1543         }
1544
1545         return 0;
1546 }
1547
1548 static void __exit acpi_thermal_exit(void)
1549 {
1550
1551         acpi_bus_unregister_driver(&acpi_thermal_driver);
1552
1553         remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1554
1555         return;
1556 }
1557
1558 module_init(acpi_thermal_init);
1559 module_exit(acpi_thermal_exit);