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1da177e4 LT |
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> | |
0b5bfa1c | 36 | #include <linux/dmi.h> |
1da177e4 | 37 | #include <linux/init.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
1da177e4 | 39 | #include <linux/types.h> |
cd354f1a | 40 | #include <linux/jiffies.h> |
1da177e4 | 41 | #include <linux/kmod.h> |
10a0a8d4 | 42 | #include <linux/reboot.h> |
f6f5c45e | 43 | #include <linux/device.h> |
1da177e4 | 44 | #include <asm/uaccess.h> |
3f655ef8 | 45 | #include <linux/thermal.h> |
1da177e4 LT |
46 | #include <acpi/acpi_bus.h> |
47 | #include <acpi/acpi_drivers.h> | |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 | 51 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 LT |
52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
53 | #define ACPI_THERMAL_FILE_STATE "state" | |
54 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
55 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
56 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
57 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
58 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
59 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
60 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
61 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
62 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
63 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
64 | |
65 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
66 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
67 | ||
1da177e4 | 68 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 69 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 70 | |
1cbf4c56 | 71 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 72 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
73 | MODULE_LICENSE("GPL"); |
74 | ||
f8707ec9 LB |
75 | static int act; |
76 | module_param(act, int, 0644); | |
3c1d36da | 77 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 78 | |
c52a7419 LB |
79 | static int crt; |
80 | module_param(crt, int, 0644); | |
81 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
82 | ||
1da177e4 | 83 | static int tzp; |
730ff34d | 84 | module_param(tzp, int, 0444); |
3c1d36da | 85 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 86 | |
f5487145 LB |
87 | static int nocrt; |
88 | module_param(nocrt, int, 0); | |
8c99fdce | 89 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 90 | |
72b33ef8 LB |
91 | static int off; |
92 | module_param(off, int, 0); | |
3c1d36da | 93 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 94 | |
a70cdc52 LB |
95 | static int psv; |
96 | module_param(psv, int, 0644); | |
3c1d36da | 97 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 98 | |
4be44fcd LB |
99 | static int acpi_thermal_add(struct acpi_device *device); |
100 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 101 | static int acpi_thermal_resume(struct acpi_device *device); |
342d550d | 102 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 103 | |
1ba90e3a TR |
104 | static const struct acpi_device_id thermal_device_ids[] = { |
105 | {ACPI_THERMAL_HID, 0}, | |
106 | {"", 0}, | |
107 | }; | |
108 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
109 | ||
1da177e4 | 110 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 111 | .name = "thermal", |
4be44fcd | 112 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 113 | .ids = thermal_device_ids, |
4be44fcd LB |
114 | .ops = { |
115 | .add = acpi_thermal_add, | |
116 | .remove = acpi_thermal_remove, | |
74ce1468 | 117 | .resume = acpi_thermal_resume, |
342d550d | 118 | .notify = acpi_thermal_notify, |
4be44fcd | 119 | }, |
1da177e4 LT |
120 | }; |
121 | ||
122 | struct acpi_thermal_state { | |
4be44fcd LB |
123 | u8 critical:1; |
124 | u8 hot:1; | |
125 | u8 passive:1; | |
126 | u8 active:1; | |
127 | u8 reserved:4; | |
128 | int active_index; | |
1da177e4 LT |
129 | }; |
130 | ||
131 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
132 | u8 valid:1; |
133 | u8 enabled:1; | |
134 | u8 reserved:6; | |
1da177e4 LT |
135 | }; |
136 | ||
137 | struct acpi_thermal_critical { | |
138 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 139 | unsigned long temperature; |
1da177e4 LT |
140 | }; |
141 | ||
142 | struct acpi_thermal_hot { | |
143 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 144 | unsigned long temperature; |
1da177e4 LT |
145 | }; |
146 | ||
147 | struct acpi_thermal_passive { | |
148 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
149 | unsigned long temperature; |
150 | unsigned long tc1; | |
151 | unsigned long tc2; | |
152 | unsigned long tsp; | |
153 | struct acpi_handle_list devices; | |
1da177e4 LT |
154 | }; |
155 | ||
156 | struct acpi_thermal_active { | |
157 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
158 | unsigned long temperature; |
159 | struct acpi_handle_list devices; | |
1da177e4 LT |
160 | }; |
161 | ||
162 | struct acpi_thermal_trips { | |
163 | struct acpi_thermal_critical critical; | |
4be44fcd | 164 | struct acpi_thermal_hot hot; |
1da177e4 LT |
165 | struct acpi_thermal_passive passive; |
166 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
167 | }; | |
168 | ||
169 | struct acpi_thermal_flags { | |
4be44fcd LB |
170 | u8 cooling_mode:1; /* _SCP */ |
171 | u8 devices:1; /* _TZD */ | |
172 | u8 reserved:6; | |
1da177e4 LT |
173 | }; |
174 | ||
175 | struct acpi_thermal { | |
8348e1b1 | 176 | struct acpi_device * device; |
4be44fcd LB |
177 | acpi_bus_id name; |
178 | unsigned long temperature; | |
179 | unsigned long last_temperature; | |
180 | unsigned long polling_frequency; | |
4be44fcd | 181 | volatile u8 zombie; |
1da177e4 LT |
182 | struct acpi_thermal_flags flags; |
183 | struct acpi_thermal_state state; | |
184 | struct acpi_thermal_trips trips; | |
4be44fcd | 185 | struct acpi_handle_list devices; |
3f655ef8 ZR |
186 | struct thermal_zone_device *thermal_zone; |
187 | int tz_enabled; | |
13614e37 | 188 | int kelvin_offset; |
6e215785 | 189 | struct mutex lock; |
1da177e4 LT |
190 | }; |
191 | ||
1da177e4 LT |
192 | /* -------------------------------------------------------------------------- |
193 | Thermal Zone Management | |
194 | -------------------------------------------------------------------------- */ | |
195 | ||
4be44fcd | 196 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 197 | { |
4be44fcd | 198 | acpi_status status = AE_OK; |
27663c58 | 199 | unsigned long long tmp; |
1da177e4 LT |
200 | |
201 | if (!tz) | |
d550d98d | 202 | return -EINVAL; |
1da177e4 LT |
203 | |
204 | tz->last_temperature = tz->temperature; | |
205 | ||
27663c58 | 206 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 207 | if (ACPI_FAILURE(status)) |
d550d98d | 208 | return -ENODEV; |
1da177e4 | 209 | |
27663c58 | 210 | tz->temperature = tmp; |
4be44fcd LB |
211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
212 | tz->temperature)); | |
1da177e4 | 213 | |
d550d98d | 214 | return 0; |
1da177e4 LT |
215 | } |
216 | ||
4be44fcd | 217 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 218 | { |
4be44fcd | 219 | acpi_status status = AE_OK; |
27663c58 | 220 | unsigned long long tmp; |
1da177e4 LT |
221 | |
222 | if (!tz) | |
d550d98d | 223 | return -EINVAL; |
1da177e4 | 224 | |
27663c58 | 225 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 226 | if (ACPI_FAILURE(status)) |
d550d98d | 227 | return -ENODEV; |
1da177e4 | 228 | |
27663c58 | 229 | tz->polling_frequency = tmp; |
4be44fcd LB |
230 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
231 | tz->polling_frequency)); | |
1da177e4 | 232 | |
d550d98d | 233 | return 0; |
1da177e4 LT |
234 | } |
235 | ||
4be44fcd | 236 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 237 | { |
4be44fcd LB |
238 | acpi_status status = AE_OK; |
239 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
240 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
241 | acpi_handle handle = NULL; | |
1da177e4 | 242 | |
1da177e4 LT |
243 | |
244 | if (!tz) | |
d550d98d | 245 | return -EINVAL; |
1da177e4 | 246 | |
38ba7c9e | 247 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
248 | if (ACPI_FAILURE(status)) { |
249 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 250 | return -ENODEV; |
1da177e4 LT |
251 | } |
252 | ||
253 | arg0.integer.value = mode; | |
254 | ||
255 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
256 | if (ACPI_FAILURE(status)) | |
d550d98d | 257 | return -ENODEV; |
1da177e4 | 258 | |
d550d98d | 259 | return 0; |
1da177e4 LT |
260 | } |
261 | ||
ce44e197 ZR |
262 | #define ACPI_TRIPS_CRITICAL 0x01 |
263 | #define ACPI_TRIPS_HOT 0x02 | |
264 | #define ACPI_TRIPS_PASSIVE 0x04 | |
265 | #define ACPI_TRIPS_ACTIVE 0x08 | |
266 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 267 | |
ce44e197 ZR |
268 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
269 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 270 | |
ce44e197 ZR |
271 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
272 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
273 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 274 | |
ce44e197 ZR |
275 | /* |
276 | * This exception is thrown out in two cases: | |
277 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
278 | * when re-evaluating the AML code. | |
279 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
280 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
281 | */ | |
282 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
283 | do { \ | |
284 | if (flags != ACPI_TRIPS_INIT) \ | |
285 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
286 | "ACPI thermal trip point %s changed\n" \ | |
287 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
288 | } while (0) | |
289 | ||
290 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
291 | { | |
292 | acpi_status status = AE_OK; | |
27663c58 | 293 | unsigned long long tmp; |
ce44e197 ZR |
294 | struct acpi_handle_list devices; |
295 | int valid = 0; | |
296 | int i; | |
1da177e4 | 297 | |
fa809452 | 298 | /* Critical Shutdown */ |
ce44e197 ZR |
299 | if (flag & ACPI_TRIPS_CRITICAL) { |
300 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
301 | "_CRT", NULL, &tmp); |
302 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
303 | /* |
304 | * Treat freezing temperatures as invalid as well; some | |
305 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 306 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
307 | * ... so lets discard those as invalid. |
308 | */ | |
fa809452 TR |
309 | if (ACPI_FAILURE(status)) { |
310 | tz->trips.critical.flags.valid = 0; | |
311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
312 | "No critical threshold\n")); | |
313 | } else if (tmp <= 2732) { | |
314 | printk(KERN_WARNING FW_BUG "Invalid critical threshold " | |
315 | "(%llu)\n", tmp); | |
c52a7419 | 316 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
317 | } else { |
318 | tz->trips.critical.flags.valid = 1; | |
319 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
320 | "Found critical threshold [%lu]\n", |
321 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
322 | } |
323 | if (tz->trips.critical.flags.valid == 1) { | |
324 | if (crt == -1) { | |
325 | tz->trips.critical.flags.valid = 0; | |
326 | } else if (crt > 0) { | |
327 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
328 | /* | |
22a94d79 | 329 | * Allow override critical threshold |
ce44e197 | 330 | */ |
22a94d79 ZR |
331 | if (crt_k > tz->trips.critical.temperature) |
332 | printk(KERN_WARNING PREFIX | |
333 | "Critical threshold %d C\n", crt); | |
334 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 335 | } |
c52a7419 LB |
336 | } |
337 | } | |
338 | ||
1da177e4 | 339 | /* Critical Sleep (optional) */ |
ce44e197 | 340 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 341 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 342 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
343 | if (ACPI_FAILURE(status)) { |
344 | tz->trips.hot.flags.valid = 0; | |
345 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
346 | "No hot threshold\n")); | |
347 | } else { | |
27663c58 | 348 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
349 | tz->trips.hot.flags.valid = 1; |
350 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
351 | "Found hot threshold [%lu]\n", | |
352 | tz->trips.critical.temperature)); | |
353 | } | |
a70cdc52 LB |
354 | } |
355 | ||
ce44e197 | 356 | /* Passive (optional) */ |
0e4240d9 ZR |
357 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
358 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
359 | valid = tz->trips.passive.flags.valid; |
360 | if (psv == -1) { | |
361 | status = AE_SUPPORT; | |
362 | } else if (psv > 0) { | |
27663c58 | 363 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
364 | status = AE_OK; |
365 | } else { | |
366 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 367 | "_PSV", NULL, &tmp); |
ce44e197 | 368 | } |
1da177e4 | 369 | |
1da177e4 LT |
370 | if (ACPI_FAILURE(status)) |
371 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 372 | else { |
27663c58 | 373 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
374 | tz->trips.passive.flags.valid = 1; |
375 | if (flag == ACPI_TRIPS_INIT) { | |
376 | status = acpi_evaluate_integer( | |
377 | tz->device->handle, "_TC1", | |
27663c58 | 378 | NULL, &tmp); |
ce44e197 ZR |
379 | if (ACPI_FAILURE(status)) |
380 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
381 | else |
382 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
383 | status = acpi_evaluate_integer( |
384 | tz->device->handle, "_TC2", | |
27663c58 | 385 | NULL, &tmp); |
ce44e197 ZR |
386 | if (ACPI_FAILURE(status)) |
387 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
388 | else |
389 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
390 | status = acpi_evaluate_integer( |
391 | tz->device->handle, "_TSP", | |
27663c58 | 392 | NULL, &tmp); |
ce44e197 ZR |
393 | if (ACPI_FAILURE(status)) |
394 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
395 | else |
396 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
397 | } |
398 | } | |
399 | } | |
400 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
401 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
402 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
403 | NULL, &devices); | |
0e4240d9 ZR |
404 | if (ACPI_FAILURE(status)) { |
405 | printk(KERN_WARNING PREFIX | |
406 | "Invalid passive threshold\n"); | |
1da177e4 | 407 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 408 | } |
1da177e4 | 409 | else |
ce44e197 | 410 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 411 | |
ce44e197 ZR |
412 | if (memcmp(&tz->trips.passive.devices, &devices, |
413 | sizeof(struct acpi_handle_list))) { | |
414 | memcpy(&tz->trips.passive.devices, &devices, | |
415 | sizeof(struct acpi_handle_list)); | |
416 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
417 | } | |
418 | } | |
419 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
420 | if (valid != tz->trips.passive.flags.valid) | |
421 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
422 | } | |
1da177e4 | 423 | |
ce44e197 | 424 | /* Active (optional) */ |
4be44fcd | 425 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 426 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 427 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 428 | |
f8707ec9 | 429 | if (act == -1) |
ce44e197 ZR |
430 | break; /* disable all active trip points */ |
431 | ||
0e4240d9 ZR |
432 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
433 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 434 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 435 | name, NULL, &tmp); |
ce44e197 ZR |
436 | if (ACPI_FAILURE(status)) { |
437 | tz->trips.active[i].flags.valid = 0; | |
438 | if (i == 0) | |
439 | break; | |
440 | if (act <= 0) | |
441 | break; | |
442 | if (i == 1) | |
443 | tz->trips.active[0].temperature = | |
444 | CELSIUS_TO_KELVIN(act); | |
445 | else | |
446 | /* | |
447 | * Don't allow override higher than | |
448 | * the next higher trip point | |
449 | */ | |
450 | tz->trips.active[i - 1].temperature = | |
451 | (tz->trips.active[i - 2].temperature < | |
452 | CELSIUS_TO_KELVIN(act) ? | |
453 | tz->trips.active[i - 2].temperature : | |
454 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 455 | break; |
27663c58 MW |
456 | } else { |
457 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 458 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 459 | } |
f8707ec9 | 460 | } |
1da177e4 LT |
461 | |
462 | name[2] = 'L'; | |
ce44e197 ZR |
463 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
464 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
465 | status = acpi_evaluate_reference(tz->device->handle, | |
466 | name, NULL, &devices); | |
0e4240d9 ZR |
467 | if (ACPI_FAILURE(status)) { |
468 | printk(KERN_WARNING PREFIX | |
469 | "Invalid active%d threshold\n", i); | |
ce44e197 | 470 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 471 | } |
ce44e197 ZR |
472 | else |
473 | tz->trips.active[i].flags.valid = 1; | |
474 | ||
475 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
476 | sizeof(struct acpi_handle_list))) { | |
477 | memcpy(&tz->trips.active[i].devices, &devices, | |
478 | sizeof(struct acpi_handle_list)); | |
479 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
480 | } | |
481 | } | |
482 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
483 | if (valid != tz->trips.active[i].flags.valid) | |
484 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
485 | ||
486 | if (!tz->trips.active[i].flags.valid) | |
487 | break; | |
488 | } | |
489 | ||
490 | if (flag & ACPI_TRIPS_DEVICES) { | |
491 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
492 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
493 | NULL, &devices); | |
494 | if (memcmp(&tz->devices, &devices, | |
495 | sizeof(struct acpi_handle_list))) { | |
496 | memcpy(&tz->devices, &devices, | |
497 | sizeof(struct acpi_handle_list)); | |
498 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
499 | } | |
1da177e4 LT |
500 | } |
501 | ||
d550d98d | 502 | return 0; |
1da177e4 LT |
503 | } |
504 | ||
ce44e197 | 505 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 506 | { |
8b7ef6d8 TR |
507 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
508 | ||
509 | if (ret) | |
510 | return ret; | |
511 | ||
512 | valid = tz->trips.critical.flags.valid | | |
513 | tz->trips.hot.flags.valid | | |
514 | tz->trips.passive.flags.valid; | |
515 | ||
516 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
517 | valid |= tz->trips.active[i].flags.valid; | |
518 | ||
519 | if (!valid) { | |
520 | printk(KERN_WARNING FW_BUG "No valid trip found\n"); | |
521 | return -ENODEV; | |
522 | } | |
523 | return 0; | |
1da177e4 LT |
524 | } |
525 | ||
4be44fcd | 526 | static void acpi_thermal_check(void *data) |
1da177e4 | 527 | { |
50dd0969 | 528 | struct acpi_thermal *tz = data; |
1da177e4 | 529 | |
b1569e99 | 530 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
531 | } |
532 | ||
3f655ef8 | 533 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 534 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 535 | |
6503e5df MG |
536 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
537 | unsigned long *temp) | |
3f655ef8 ZR |
538 | { |
539 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 540 | int result; |
3f655ef8 ZR |
541 | |
542 | if (!tz) | |
543 | return -EINVAL; | |
544 | ||
76ecb4f2 ZR |
545 | result = acpi_thermal_get_temperature(tz); |
546 | if (result) | |
547 | return result; | |
548 | ||
13614e37 | 549 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 550 | return 0; |
3f655ef8 ZR |
551 | } |
552 | ||
553 | static const char enabled[] = "kernel"; | |
554 | static const char disabled[] = "user"; | |
555 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
6503e5df | 556 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
557 | { |
558 | struct acpi_thermal *tz = thermal->devdata; | |
559 | ||
560 | if (!tz) | |
561 | return -EINVAL; | |
562 | ||
6503e5df MG |
563 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
564 | THERMAL_DEVICE_DISABLED; | |
565 | ||
566 | return 0; | |
3f655ef8 ZR |
567 | } |
568 | ||
569 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 570 | enum thermal_device_mode mode) |
3f655ef8 ZR |
571 | { |
572 | struct acpi_thermal *tz = thermal->devdata; | |
573 | int enable; | |
574 | ||
575 | if (!tz) | |
576 | return -EINVAL; | |
577 | ||
578 | /* | |
579 | * enable/disable thermal management from ACPI thermal driver | |
580 | */ | |
6503e5df | 581 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 582 | enable = 1; |
6503e5df | 583 | else if (mode == THERMAL_DEVICE_DISABLED) |
3f655ef8 ZR |
584 | enable = 0; |
585 | else | |
586 | return -EINVAL; | |
587 | ||
588 | if (enable != tz->tz_enabled) { | |
589 | tz->tz_enabled = enable; | |
590 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
591 | "%s ACPI thermal control\n", | |
592 | tz->tz_enabled ? enabled : disabled)); | |
593 | acpi_thermal_check(tz); | |
594 | } | |
595 | return 0; | |
596 | } | |
597 | ||
598 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 599 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
600 | { |
601 | struct acpi_thermal *tz = thermal->devdata; | |
602 | int i; | |
603 | ||
604 | if (!tz || trip < 0) | |
605 | return -EINVAL; | |
606 | ||
607 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
608 | if (!trip) { |
609 | *type = THERMAL_TRIP_CRITICAL; | |
610 | return 0; | |
611 | } | |
3f655ef8 ZR |
612 | trip--; |
613 | } | |
614 | ||
615 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
616 | if (!trip) { |
617 | *type = THERMAL_TRIP_HOT; | |
618 | return 0; | |
619 | } | |
3f655ef8 ZR |
620 | trip--; |
621 | } | |
622 | ||
623 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
624 | if (!trip) { |
625 | *type = THERMAL_TRIP_PASSIVE; | |
626 | return 0; | |
627 | } | |
3f655ef8 ZR |
628 | trip--; |
629 | } | |
630 | ||
631 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
632 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
633 | if (!trip) { |
634 | *type = THERMAL_TRIP_ACTIVE; | |
635 | return 0; | |
636 | } | |
3f655ef8 ZR |
637 | trip--; |
638 | } | |
639 | ||
640 | return -EINVAL; | |
641 | } | |
642 | ||
643 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
6503e5df | 644 | int trip, unsigned long *temp) |
3f655ef8 ZR |
645 | { |
646 | struct acpi_thermal *tz = thermal->devdata; | |
647 | int i; | |
648 | ||
649 | if (!tz || trip < 0) | |
650 | return -EINVAL; | |
651 | ||
652 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
653 | if (!trip) { |
654 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
655 | tz->trips.critical.temperature, |
656 | tz->kelvin_offset); | |
6503e5df MG |
657 | return 0; |
658 | } | |
3f655ef8 ZR |
659 | trip--; |
660 | } | |
661 | ||
662 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
663 | if (!trip) { |
664 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
665 | tz->trips.hot.temperature, |
666 | tz->kelvin_offset); | |
6503e5df MG |
667 | return 0; |
668 | } | |
3f655ef8 ZR |
669 | trip--; |
670 | } | |
671 | ||
672 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
673 | if (!trip) { |
674 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
675 | tz->trips.passive.temperature, |
676 | tz->kelvin_offset); | |
6503e5df MG |
677 | return 0; |
678 | } | |
3f655ef8 ZR |
679 | trip--; |
680 | } | |
681 | ||
682 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
683 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
684 | if (!trip) { |
685 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
686 | tz->trips.active[i].temperature, |
687 | tz->kelvin_offset); | |
6503e5df MG |
688 | return 0; |
689 | } | |
3f655ef8 ZR |
690 | trip--; |
691 | } | |
692 | ||
693 | return -EINVAL; | |
694 | } | |
695 | ||
9ec732ff ZR |
696 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
697 | unsigned long *temperature) { | |
698 | struct acpi_thermal *tz = thermal->devdata; | |
699 | ||
700 | if (tz->trips.critical.flags.valid) { | |
701 | *temperature = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
702 | tz->trips.critical.temperature, |
703 | tz->kelvin_offset); | |
9ec732ff ZR |
704 | return 0; |
705 | } else | |
706 | return -EINVAL; | |
707 | } | |
708 | ||
b1569e99 MG |
709 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
710 | enum thermal_trip_type trip_type) | |
711 | { | |
712 | u8 type = 0; | |
713 | struct acpi_thermal *tz = thermal->devdata; | |
714 | ||
715 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
716 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
717 | else if (trip_type == THERMAL_TRIP_HOT) | |
718 | type = ACPI_THERMAL_NOTIFY_HOT; | |
719 | else | |
720 | return 0; | |
721 | ||
722 | acpi_bus_generate_proc_event(tz->device, type, 1); | |
723 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, | |
f6f5c45e | 724 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
725 | |
726 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
727 | return 1; | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
3f655ef8 ZR |
732 | typedef int (*cb)(struct thermal_zone_device *, int, |
733 | struct thermal_cooling_device *); | |
734 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
735 | struct thermal_cooling_device *cdev, | |
736 | cb action) | |
737 | { | |
738 | struct acpi_device *device = cdev->devdata; | |
739 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
740 | struct acpi_device *dev; |
741 | acpi_status status; | |
742 | acpi_handle handle; | |
3f655ef8 ZR |
743 | int i; |
744 | int j; | |
745 | int trip = -1; | |
746 | int result = 0; | |
747 | ||
748 | if (tz->trips.critical.flags.valid) | |
749 | trip++; | |
750 | ||
751 | if (tz->trips.hot.flags.valid) | |
752 | trip++; | |
753 | ||
754 | if (tz->trips.passive.flags.valid) { | |
755 | trip++; | |
756 | for (i = 0; i < tz->trips.passive.devices.count; | |
757 | i++) { | |
653a00c9 ZR |
758 | handle = tz->trips.passive.devices.handles[i]; |
759 | status = acpi_bus_get_device(handle, &dev); | |
760 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
761 | result = action(thermal, trip, cdev); | |
762 | if (result) | |
763 | goto failed; | |
764 | } | |
3f655ef8 ZR |
765 | } |
766 | } | |
767 | ||
768 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
769 | if (!tz->trips.active[i].flags.valid) | |
770 | break; | |
771 | trip++; | |
772 | for (j = 0; | |
773 | j < tz->trips.active[i].devices.count; | |
774 | j++) { | |
653a00c9 ZR |
775 | handle = tz->trips.active[i].devices.handles[j]; |
776 | status = acpi_bus_get_device(handle, &dev); | |
777 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
778 | result = action(thermal, trip, cdev); | |
779 | if (result) | |
780 | goto failed; | |
781 | } | |
3f655ef8 ZR |
782 | } |
783 | } | |
784 | ||
785 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
786 | handle = tz->devices.handles[i]; |
787 | status = acpi_bus_get_device(handle, &dev); | |
788 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
789 | result = action(thermal, -1, cdev); | |
790 | if (result) | |
791 | goto failed; | |
792 | } | |
3f655ef8 ZR |
793 | } |
794 | ||
795 | failed: | |
796 | return result; | |
797 | } | |
798 | ||
799 | static int | |
800 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
801 | struct thermal_cooling_device *cdev) | |
802 | { | |
803 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
804 | thermal_zone_bind_cooling_device); | |
805 | } | |
806 | ||
807 | static int | |
808 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
809 | struct thermal_cooling_device *cdev) | |
810 | { | |
811 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
812 | thermal_zone_unbind_cooling_device); | |
813 | } | |
814 | ||
9c8b04be | 815 | static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
816 | .bind = acpi_thermal_bind_cooling_device, |
817 | .unbind = acpi_thermal_unbind_cooling_device, | |
818 | .get_temp = thermal_get_temp, | |
819 | .get_mode = thermal_get_mode, | |
820 | .set_mode = thermal_set_mode, | |
821 | .get_trip_type = thermal_get_trip_type, | |
822 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 823 | .get_crit_temp = thermal_get_crit_temp, |
b1569e99 | 824 | .notify = thermal_notify, |
3f655ef8 ZR |
825 | }; |
826 | ||
827 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
828 | { | |
829 | int trips = 0; | |
830 | int result; | |
20733939 | 831 | acpi_status status; |
3f655ef8 ZR |
832 | int i; |
833 | ||
834 | if (tz->trips.critical.flags.valid) | |
835 | trips++; | |
836 | ||
837 | if (tz->trips.hot.flags.valid) | |
838 | trips++; | |
839 | ||
840 | if (tz->trips.passive.flags.valid) | |
841 | trips++; | |
842 | ||
843 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
844 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
845 | |
846 | if (tz->trips.passive.flags.valid) | |
847 | tz->thermal_zone = | |
848 | thermal_zone_device_register("acpitz", trips, tz, | |
849 | &acpi_thermal_zone_ops, | |
850 | tz->trips.passive.tc1, | |
851 | tz->trips.passive.tc2, | |
852 | tz->trips.passive.tsp*100, | |
853 | tz->polling_frequency*100); | |
854 | else | |
855 | tz->thermal_zone = | |
856 | thermal_zone_device_register("acpitz", trips, tz, | |
857 | &acpi_thermal_zone_ops, | |
858 | 0, 0, 0, | |
67405439 | 859 | tz->polling_frequency*100); |
bb070e43 | 860 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
861 | return -ENODEV; |
862 | ||
863 | result = sysfs_create_link(&tz->device->dev.kobj, | |
864 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
865 | if (result) | |
866 | return result; | |
867 | ||
868 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
869 | &tz->device->dev.kobj, "device"); | |
870 | if (result) | |
871 | return result; | |
872 | ||
20733939 ZR |
873 | status = acpi_attach_data(tz->device->handle, |
874 | acpi_bus_private_data_handler, | |
875 | tz->thermal_zone); | |
876 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
877 | printk(KERN_ERR PREFIX |
878 | "Error attaching device data\n"); | |
20733939 ZR |
879 | return -ENODEV; |
880 | } | |
881 | ||
3f655ef8 ZR |
882 | tz->tz_enabled = 1; |
883 | ||
fc3a8828 GKH |
884 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
885 | tz->thermal_zone->id); | |
3f655ef8 ZR |
886 | return 0; |
887 | } | |
888 | ||
889 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
890 | { | |
891 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
892 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
893 | thermal_zone_device_unregister(tz->thermal_zone); | |
894 | tz->thermal_zone = NULL; | |
20733939 | 895 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
896 | } |
897 | ||
898 | ||
1da177e4 LT |
899 | /* -------------------------------------------------------------------------- |
900 | Driver Interface | |
901 | -------------------------------------------------------------------------- */ | |
902 | ||
342d550d | 903 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 904 | { |
342d550d | 905 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 906 | |
1da177e4 LT |
907 | |
908 | if (!tz) | |
d550d98d | 909 | return; |
1da177e4 | 910 | |
1da177e4 LT |
911 | switch (event) { |
912 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
913 | acpi_thermal_check(tz); | |
914 | break; | |
915 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 916 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 917 | acpi_thermal_check(tz); |
14e04fb3 | 918 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 919 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 920 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
921 | break; |
922 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
923 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
924 | acpi_thermal_check(tz); | |
14e04fb3 | 925 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 926 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 927 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
928 | break; |
929 | default: | |
930 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 931 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
932 | break; |
933 | } | |
1da177e4 LT |
934 | } |
935 | ||
4be44fcd | 936 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 937 | { |
4be44fcd | 938 | int result = 0; |
1da177e4 | 939 | |
1da177e4 LT |
940 | |
941 | if (!tz) | |
d550d98d | 942 | return -EINVAL; |
1da177e4 LT |
943 | |
944 | /* Get temperature [_TMP] (required) */ | |
945 | result = acpi_thermal_get_temperature(tz); | |
946 | if (result) | |
d550d98d | 947 | return result; |
1da177e4 LT |
948 | |
949 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
950 | result = acpi_thermal_get_trip_points(tz); | |
951 | if (result) | |
d550d98d | 952 | return result; |
1da177e4 LT |
953 | |
954 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
955 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 956 | if (!result) |
1da177e4 | 957 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
958 | |
959 | /* Get default polling frequency [_TZP] (optional) */ | |
960 | if (tzp) | |
961 | tz->polling_frequency = tzp; | |
962 | else | |
963 | acpi_thermal_get_polling_frequency(tz); | |
964 | ||
d550d98d | 965 | return 0; |
1da177e4 LT |
966 | } |
967 | ||
13614e37 JD |
968 | /* |
969 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
970 | * handles temperature values with a single decimal place. As a consequence, | |
971 | * some implementations use an offset of 273.1 and others use an offset of | |
972 | * 273.2. Try to find out which one is being used, to present the most | |
973 | * accurate and visually appealing number. | |
974 | * | |
975 | * The heuristic below should work for all ACPI thermal zones which have a | |
976 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
977 | */ | |
978 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
979 | { | |
980 | if (tz->trips.critical.flags.valid && | |
981 | (tz->trips.critical.temperature % 5) == 1) | |
982 | tz->kelvin_offset = 2731; | |
983 | else | |
984 | tz->kelvin_offset = 2732; | |
985 | } | |
986 | ||
4be44fcd | 987 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 988 | { |
4be44fcd | 989 | int result = 0; |
4be44fcd | 990 | struct acpi_thermal *tz = NULL; |
1da177e4 | 991 | |
1da177e4 LT |
992 | |
993 | if (!device) | |
d550d98d | 994 | return -EINVAL; |
1da177e4 | 995 | |
36bcbec7 | 996 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 997 | if (!tz) |
d550d98d | 998 | return -ENOMEM; |
1da177e4 | 999 | |
8348e1b1 | 1000 | tz->device = device; |
1da177e4 LT |
1001 | strcpy(tz->name, device->pnp.bus_id); |
1002 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1003 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1004 | device->driver_data = tz; |
6e215785 | 1005 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1006 | |
1007 | ||
1da177e4 LT |
1008 | result = acpi_thermal_get_info(tz); |
1009 | if (result) | |
3f655ef8 ZR |
1010 | goto free_memory; |
1011 | ||
13614e37 JD |
1012 | acpi_thermal_guess_offset(tz); |
1013 | ||
3f655ef8 ZR |
1014 | result = acpi_thermal_register_thermal_zone(tz); |
1015 | if (result) | |
1016 | goto free_memory; | |
1da177e4 | 1017 | |
1da177e4 | 1018 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", |
4be44fcd LB |
1019 | acpi_device_name(device), acpi_device_bid(device), |
1020 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1021 | goto end; |
1da177e4 | 1022 | |
3f655ef8 ZR |
1023 | free_memory: |
1024 | kfree(tz); | |
1025 | end: | |
d550d98d | 1026 | return result; |
1da177e4 LT |
1027 | } |
1028 | ||
4be44fcd | 1029 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1030 | { |
4be44fcd | 1031 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1032 | |
1da177e4 | 1033 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1034 | return -EINVAL; |
1da177e4 | 1035 | |
50dd0969 | 1036 | tz = acpi_driver_data(device); |
1da177e4 | 1037 | |
3f655ef8 | 1038 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1039 | mutex_destroy(&tz->lock); |
1da177e4 | 1040 | kfree(tz); |
d550d98d | 1041 | return 0; |
1da177e4 LT |
1042 | } |
1043 | ||
5d9464a4 | 1044 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1045 | { |
1046 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1047 | int i, j, power_state, result; |
1048 | ||
74ce1468 KK |
1049 | |
1050 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1051 | return -EINVAL; |
74ce1468 | 1052 | |
50dd0969 | 1053 | tz = acpi_driver_data(device); |
74ce1468 | 1054 | |
bed936f7 | 1055 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1056 | if (!(&tz->trips.active[i])) |
1057 | break; | |
1058 | if (!tz->trips.active[i].flags.valid) | |
1059 | break; | |
1060 | tz->trips.active[i].flags.enabled = 1; | |
1061 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1062 | result = acpi_bus_update_power( |
1063 | tz->trips.active[i].devices.handles[j], | |
1064 | &power_state); | |
b1028c54 KK |
1065 | if (result || (power_state != ACPI_STATE_D0)) { |
1066 | tz->trips.active[i].flags.enabled = 0; | |
1067 | break; | |
1068 | } | |
bed936f7 | 1069 | } |
b1028c54 | 1070 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1071 | } |
1072 | ||
b1028c54 | 1073 | acpi_thermal_check(tz); |
74ce1468 KK |
1074 | |
1075 | return AE_OK; | |
1076 | } | |
1077 | ||
1855256c | 1078 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1079 | |
1080 | if (act == 0) { | |
1081 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1082 | "disabling all active thermal trip points\n", d->ident); | |
1083 | act = -1; | |
1084 | } | |
1085 | return 0; | |
1086 | } | |
1855256c | 1087 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1088 | |
1089 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1090 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1091 | nocrt = 1; | |
1092 | return 0; | |
1093 | } | |
1855256c | 1094 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1095 | |
1096 | if (tzp == 0) { | |
1097 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1098 | "enabling thermal zone polling\n", d->ident); | |
1099 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1100 | } | |
1101 | return 0; | |
1102 | } | |
1855256c | 1103 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1104 | |
1105 | if (psv == 0) { | |
1106 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1107 | "disabling all passive thermal trip points\n", d->ident); | |
1108 | psv = -1; | |
1109 | } | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1114 | /* | |
1115 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1116 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1117 | */ | |
1118 | { | |
1119 | .callback = thermal_act, | |
1120 | .ident = "AOpen i915GMm-HFS", | |
1121 | .matches = { | |
1122 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1123 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1124 | }, | |
1125 | }, | |
1126 | { | |
1127 | .callback = thermal_psv, | |
1128 | .ident = "AOpen i915GMm-HFS", | |
1129 | .matches = { | |
1130 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1131 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1132 | }, | |
1133 | }, | |
1134 | { | |
1135 | .callback = thermal_tzp, | |
1136 | .ident = "AOpen i915GMm-HFS", | |
1137 | .matches = { | |
1138 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1139 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1140 | }, | |
1141 | }, | |
8c99fdce LB |
1142 | { |
1143 | .callback = thermal_nocrt, | |
1144 | .ident = "Gigabyte GA-7ZX", | |
1145 | .matches = { | |
1146 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1147 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1148 | }, | |
1149 | }, | |
0b5bfa1c LB |
1150 | {} |
1151 | }; | |
0b5bfa1c | 1152 | |
4be44fcd | 1153 | static int __init acpi_thermal_init(void) |
1da177e4 | 1154 | { |
4be44fcd | 1155 | int result = 0; |
1da177e4 | 1156 | |
0b5bfa1c LB |
1157 | dmi_check_system(thermal_dmi_table); |
1158 | ||
72b33ef8 LB |
1159 | if (off) { |
1160 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1161 | return -ENODEV; | |
1162 | } | |
43d9f87b | 1163 | |
1da177e4 | 1164 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
c57b62f5 | 1165 | if (result < 0) |
d550d98d | 1166 | return -ENODEV; |
1da177e4 | 1167 | |
d550d98d | 1168 | return 0; |
1da177e4 LT |
1169 | } |
1170 | ||
4be44fcd | 1171 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1172 | { |
1da177e4 LT |
1173 | |
1174 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1175 | ||
d550d98d | 1176 | return; |
1da177e4 LT |
1177 | } |
1178 | ||
1da177e4 LT |
1179 | module_init(acpi_thermal_init); |
1180 | module_exit(acpi_thermal_exit); |