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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 | 52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
1da177e4 LT |
53 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 |
54 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
55 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
56 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
57 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
58 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
59 | |
60 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
61 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
62 | ||
1da177e4 | 63 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 64 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 65 | |
1cbf4c56 | 66 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 67 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
68 | MODULE_LICENSE("GPL"); |
69 | ||
f8707ec9 LB |
70 | static int act; |
71 | module_param(act, int, 0644); | |
3c1d36da | 72 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 73 | |
c52a7419 LB |
74 | static int crt; |
75 | module_param(crt, int, 0644); | |
76 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
77 | ||
1da177e4 | 78 | static int tzp; |
730ff34d | 79 | module_param(tzp, int, 0444); |
3c1d36da | 80 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 81 | |
f5487145 LB |
82 | static int nocrt; |
83 | module_param(nocrt, int, 0); | |
8c99fdce | 84 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 85 | |
72b33ef8 LB |
86 | static int off; |
87 | module_param(off, int, 0); | |
3c1d36da | 88 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 89 | |
a70cdc52 LB |
90 | static int psv; |
91 | module_param(psv, int, 0644); | |
3c1d36da | 92 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 93 | |
4be44fcd | 94 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 95 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 96 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 97 | |
1ba90e3a TR |
98 | static const struct acpi_device_id thermal_device_ids[] = { |
99 | {ACPI_THERMAL_HID, 0}, | |
100 | {"", 0}, | |
101 | }; | |
102 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
103 | ||
90692404 | 104 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 105 | static int acpi_thermal_resume(struct device *dev); |
90692404 | 106 | #endif |
167cffb6 RW |
107 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume); |
108 | ||
1da177e4 | 109 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 110 | .name = "thermal", |
4be44fcd | 111 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 112 | .ids = thermal_device_ids, |
4be44fcd LB |
113 | .ops = { |
114 | .add = acpi_thermal_add, | |
115 | .remove = acpi_thermal_remove, | |
342d550d | 116 | .notify = acpi_thermal_notify, |
4be44fcd | 117 | }, |
167cffb6 | 118 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct acpi_thermal_state { | |
4be44fcd LB |
122 | u8 critical:1; |
123 | u8 hot:1; | |
124 | u8 passive:1; | |
125 | u8 active:1; | |
126 | u8 reserved:4; | |
127 | int active_index; | |
1da177e4 LT |
128 | }; |
129 | ||
130 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
131 | u8 valid:1; |
132 | u8 enabled:1; | |
133 | u8 reserved:6; | |
1da177e4 LT |
134 | }; |
135 | ||
136 | struct acpi_thermal_critical { | |
137 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 138 | unsigned long temperature; |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_thermal_hot { | |
142 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 143 | unsigned long temperature; |
1da177e4 LT |
144 | }; |
145 | ||
146 | struct acpi_thermal_passive { | |
147 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
148 | unsigned long temperature; |
149 | unsigned long tc1; | |
150 | unsigned long tc2; | |
151 | unsigned long tsp; | |
152 | struct acpi_handle_list devices; | |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct acpi_thermal_active { | |
156 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
157 | unsigned long temperature; |
158 | struct acpi_handle_list devices; | |
1da177e4 LT |
159 | }; |
160 | ||
161 | struct acpi_thermal_trips { | |
162 | struct acpi_thermal_critical critical; | |
4be44fcd | 163 | struct acpi_thermal_hot hot; |
1da177e4 LT |
164 | struct acpi_thermal_passive passive; |
165 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
166 | }; | |
167 | ||
168 | struct acpi_thermal_flags { | |
4be44fcd LB |
169 | u8 cooling_mode:1; /* _SCP */ |
170 | u8 devices:1; /* _TZD */ | |
171 | u8 reserved:6; | |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_thermal { | |
8348e1b1 | 175 | struct acpi_device * device; |
4be44fcd LB |
176 | acpi_bus_id name; |
177 | unsigned long temperature; | |
178 | unsigned long last_temperature; | |
179 | unsigned long polling_frequency; | |
4be44fcd | 180 | volatile u8 zombie; |
1da177e4 LT |
181 | struct acpi_thermal_flags flags; |
182 | struct acpi_thermal_state state; | |
183 | struct acpi_thermal_trips trips; | |
4be44fcd | 184 | struct acpi_handle_list devices; |
3f655ef8 ZR |
185 | struct thermal_zone_device *thermal_zone; |
186 | int tz_enabled; | |
13614e37 | 187 | int kelvin_offset; |
1da177e4 LT |
188 | }; |
189 | ||
1da177e4 LT |
190 | /* -------------------------------------------------------------------------- |
191 | Thermal Zone Management | |
192 | -------------------------------------------------------------------------- */ | |
193 | ||
4be44fcd | 194 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 195 | { |
4be44fcd | 196 | acpi_status status = AE_OK; |
27663c58 | 197 | unsigned long long tmp; |
1da177e4 LT |
198 | |
199 | if (!tz) | |
d550d98d | 200 | return -EINVAL; |
1da177e4 LT |
201 | |
202 | tz->last_temperature = tz->temperature; | |
203 | ||
27663c58 | 204 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 205 | if (ACPI_FAILURE(status)) |
d550d98d | 206 | return -ENODEV; |
1da177e4 | 207 | |
27663c58 | 208 | tz->temperature = tmp; |
4be44fcd LB |
209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
210 | tz->temperature)); | |
1da177e4 | 211 | |
d550d98d | 212 | return 0; |
1da177e4 LT |
213 | } |
214 | ||
4be44fcd | 215 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 216 | { |
4be44fcd | 217 | acpi_status status = AE_OK; |
27663c58 | 218 | unsigned long long tmp; |
1da177e4 LT |
219 | |
220 | if (!tz) | |
d550d98d | 221 | return -EINVAL; |
1da177e4 | 222 | |
27663c58 | 223 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 224 | if (ACPI_FAILURE(status)) |
d550d98d | 225 | return -ENODEV; |
1da177e4 | 226 | |
27663c58 | 227 | tz->polling_frequency = tmp; |
4be44fcd LB |
228 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
229 | tz->polling_frequency)); | |
1da177e4 | 230 | |
d550d98d | 231 | return 0; |
1da177e4 LT |
232 | } |
233 | ||
4be44fcd | 234 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 235 | { |
4be44fcd LB |
236 | acpi_status status = AE_OK; |
237 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
238 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
239 | acpi_handle handle = NULL; | |
1da177e4 | 240 | |
1da177e4 LT |
241 | |
242 | if (!tz) | |
d550d98d | 243 | return -EINVAL; |
1da177e4 | 244 | |
38ba7c9e | 245 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
246 | if (ACPI_FAILURE(status)) { |
247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 248 | return -ENODEV; |
1da177e4 LT |
249 | } |
250 | ||
251 | arg0.integer.value = mode; | |
252 | ||
253 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
254 | if (ACPI_FAILURE(status)) | |
d550d98d | 255 | return -ENODEV; |
1da177e4 | 256 | |
d550d98d | 257 | return 0; |
1da177e4 LT |
258 | } |
259 | ||
ce44e197 ZR |
260 | #define ACPI_TRIPS_CRITICAL 0x01 |
261 | #define ACPI_TRIPS_HOT 0x02 | |
262 | #define ACPI_TRIPS_PASSIVE 0x04 | |
263 | #define ACPI_TRIPS_ACTIVE 0x08 | |
264 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 265 | |
ce44e197 ZR |
266 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
267 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 268 | |
ce44e197 ZR |
269 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
270 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
271 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 272 | |
ce44e197 ZR |
273 | /* |
274 | * This exception is thrown out in two cases: | |
275 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
276 | * when re-evaluating the AML code. | |
277 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
278 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
279 | */ | |
280 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
281 | do { \ | |
282 | if (flags != ACPI_TRIPS_INIT) \ | |
283 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
284 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 285 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
286 | } while (0) |
287 | ||
288 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
289 | { | |
290 | acpi_status status = AE_OK; | |
27663c58 | 291 | unsigned long long tmp; |
ce44e197 ZR |
292 | struct acpi_handle_list devices; |
293 | int valid = 0; | |
294 | int i; | |
1da177e4 | 295 | |
fa809452 | 296 | /* Critical Shutdown */ |
ce44e197 ZR |
297 | if (flag & ACPI_TRIPS_CRITICAL) { |
298 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
299 | "_CRT", NULL, &tmp); |
300 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
301 | /* |
302 | * Treat freezing temperatures as invalid as well; some | |
303 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 304 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
305 | * ... so lets discard those as invalid. |
306 | */ | |
fa809452 TR |
307 | if (ACPI_FAILURE(status)) { |
308 | tz->trips.critical.flags.valid = 0; | |
309 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
310 | "No critical threshold\n")); | |
311 | } else if (tmp <= 2732) { | |
312 | printk(KERN_WARNING FW_BUG "Invalid critical threshold " | |
313 | "(%llu)\n", tmp); | |
c52a7419 | 314 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
315 | } else { |
316 | tz->trips.critical.flags.valid = 1; | |
317 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
318 | "Found critical threshold [%lu]\n", |
319 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
320 | } |
321 | if (tz->trips.critical.flags.valid == 1) { | |
322 | if (crt == -1) { | |
323 | tz->trips.critical.flags.valid = 0; | |
324 | } else if (crt > 0) { | |
325 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
326 | /* | |
22a94d79 | 327 | * Allow override critical threshold |
ce44e197 | 328 | */ |
22a94d79 ZR |
329 | if (crt_k > tz->trips.critical.temperature) |
330 | printk(KERN_WARNING PREFIX | |
331 | "Critical threshold %d C\n", crt); | |
332 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 333 | } |
c52a7419 LB |
334 | } |
335 | } | |
336 | ||
1da177e4 | 337 | /* Critical Sleep (optional) */ |
ce44e197 | 338 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 339 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 340 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
341 | if (ACPI_FAILURE(status)) { |
342 | tz->trips.hot.flags.valid = 0; | |
343 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
344 | "No hot threshold\n")); | |
345 | } else { | |
27663c58 | 346 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
347 | tz->trips.hot.flags.valid = 1; |
348 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
349 | "Found hot threshold [%lu]\n", | |
350 | tz->trips.critical.temperature)); | |
351 | } | |
a70cdc52 LB |
352 | } |
353 | ||
ce44e197 | 354 | /* Passive (optional) */ |
0e4240d9 ZR |
355 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
356 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
357 | valid = tz->trips.passive.flags.valid; |
358 | if (psv == -1) { | |
359 | status = AE_SUPPORT; | |
360 | } else if (psv > 0) { | |
27663c58 | 361 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
362 | status = AE_OK; |
363 | } else { | |
364 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 365 | "_PSV", NULL, &tmp); |
ce44e197 | 366 | } |
1da177e4 | 367 | |
1da177e4 LT |
368 | if (ACPI_FAILURE(status)) |
369 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 370 | else { |
27663c58 | 371 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
372 | tz->trips.passive.flags.valid = 1; |
373 | if (flag == ACPI_TRIPS_INIT) { | |
374 | status = acpi_evaluate_integer( | |
375 | tz->device->handle, "_TC1", | |
27663c58 | 376 | NULL, &tmp); |
ce44e197 ZR |
377 | if (ACPI_FAILURE(status)) |
378 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
379 | else |
380 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
381 | status = acpi_evaluate_integer( |
382 | tz->device->handle, "_TC2", | |
27663c58 | 383 | NULL, &tmp); |
ce44e197 ZR |
384 | if (ACPI_FAILURE(status)) |
385 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
386 | else |
387 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
388 | status = acpi_evaluate_integer( |
389 | tz->device->handle, "_TSP", | |
27663c58 | 390 | NULL, &tmp); |
ce44e197 ZR |
391 | if (ACPI_FAILURE(status)) |
392 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
393 | else |
394 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
395 | } |
396 | } | |
397 | } | |
398 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
399 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
400 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
401 | NULL, &devices); | |
0e4240d9 ZR |
402 | if (ACPI_FAILURE(status)) { |
403 | printk(KERN_WARNING PREFIX | |
404 | "Invalid passive threshold\n"); | |
1da177e4 | 405 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 406 | } |
1da177e4 | 407 | else |
ce44e197 | 408 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 409 | |
ce44e197 ZR |
410 | if (memcmp(&tz->trips.passive.devices, &devices, |
411 | sizeof(struct acpi_handle_list))) { | |
412 | memcpy(&tz->trips.passive.devices, &devices, | |
413 | sizeof(struct acpi_handle_list)); | |
414 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
415 | } | |
416 | } | |
417 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
418 | if (valid != tz->trips.passive.flags.valid) | |
419 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
420 | } | |
1da177e4 | 421 | |
ce44e197 | 422 | /* Active (optional) */ |
4be44fcd | 423 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 424 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 425 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 426 | |
f8707ec9 | 427 | if (act == -1) |
ce44e197 ZR |
428 | break; /* disable all active trip points */ |
429 | ||
0e4240d9 ZR |
430 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
431 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 432 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 433 | name, NULL, &tmp); |
ce44e197 ZR |
434 | if (ACPI_FAILURE(status)) { |
435 | tz->trips.active[i].flags.valid = 0; | |
436 | if (i == 0) | |
437 | break; | |
438 | if (act <= 0) | |
439 | break; | |
440 | if (i == 1) | |
441 | tz->trips.active[0].temperature = | |
442 | CELSIUS_TO_KELVIN(act); | |
443 | else | |
444 | /* | |
445 | * Don't allow override higher than | |
446 | * the next higher trip point | |
447 | */ | |
448 | tz->trips.active[i - 1].temperature = | |
449 | (tz->trips.active[i - 2].temperature < | |
450 | CELSIUS_TO_KELVIN(act) ? | |
451 | tz->trips.active[i - 2].temperature : | |
452 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 453 | break; |
27663c58 MW |
454 | } else { |
455 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 456 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 457 | } |
f8707ec9 | 458 | } |
1da177e4 LT |
459 | |
460 | name[2] = 'L'; | |
ce44e197 ZR |
461 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
462 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
463 | status = acpi_evaluate_reference(tz->device->handle, | |
464 | name, NULL, &devices); | |
0e4240d9 ZR |
465 | if (ACPI_FAILURE(status)) { |
466 | printk(KERN_WARNING PREFIX | |
467 | "Invalid active%d threshold\n", i); | |
ce44e197 | 468 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 469 | } |
ce44e197 ZR |
470 | else |
471 | tz->trips.active[i].flags.valid = 1; | |
472 | ||
473 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
474 | sizeof(struct acpi_handle_list))) { | |
475 | memcpy(&tz->trips.active[i].devices, &devices, | |
476 | sizeof(struct acpi_handle_list)); | |
477 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
478 | } | |
479 | } | |
480 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
481 | if (valid != tz->trips.active[i].flags.valid) | |
482 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
483 | ||
484 | if (!tz->trips.active[i].flags.valid) | |
485 | break; | |
486 | } | |
487 | ||
488 | if (flag & ACPI_TRIPS_DEVICES) { | |
489 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
490 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
491 | NULL, &devices); | |
492 | if (memcmp(&tz->devices, &devices, | |
493 | sizeof(struct acpi_handle_list))) { | |
494 | memcpy(&tz->devices, &devices, | |
495 | sizeof(struct acpi_handle_list)); | |
496 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
497 | } | |
1da177e4 LT |
498 | } |
499 | ||
d550d98d | 500 | return 0; |
1da177e4 LT |
501 | } |
502 | ||
ce44e197 | 503 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 504 | { |
8b7ef6d8 TR |
505 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
506 | ||
507 | if (ret) | |
508 | return ret; | |
509 | ||
510 | valid = tz->trips.critical.flags.valid | | |
511 | tz->trips.hot.flags.valid | | |
512 | tz->trips.passive.flags.valid; | |
513 | ||
514 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
515 | valid |= tz->trips.active[i].flags.valid; | |
516 | ||
517 | if (!valid) { | |
518 | printk(KERN_WARNING FW_BUG "No valid trip found\n"); | |
519 | return -ENODEV; | |
520 | } | |
521 | return 0; | |
1da177e4 LT |
522 | } |
523 | ||
4be44fcd | 524 | static void acpi_thermal_check(void *data) |
1da177e4 | 525 | { |
50dd0969 | 526 | struct acpi_thermal *tz = data; |
1da177e4 | 527 | |
ca4e7130 SP |
528 | if (!tz->tz_enabled) { |
529 | pr_warn("thermal zone is disabled \n"); | |
530 | return; | |
531 | } | |
b1569e99 | 532 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
533 | } |
534 | ||
3f655ef8 | 535 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 536 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 537 | |
6503e5df MG |
538 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
539 | unsigned long *temp) | |
3f655ef8 ZR |
540 | { |
541 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 542 | int result; |
3f655ef8 ZR |
543 | |
544 | if (!tz) | |
545 | return -EINVAL; | |
546 | ||
76ecb4f2 ZR |
547 | result = acpi_thermal_get_temperature(tz); |
548 | if (result) | |
549 | return result; | |
550 | ||
13614e37 | 551 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 552 | return 0; |
3f655ef8 ZR |
553 | } |
554 | ||
3f655ef8 | 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, | |
8eaa8d6c ZR |
591 | "%s kernel ACPI thermal control\n", |
592 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
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 | ||
601f3d42 ZR |
709 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
710 | int trip, enum thermal_trend *trend) | |
711 | { | |
712 | struct acpi_thermal *tz = thermal->devdata; | |
713 | enum thermal_trip_type type; | |
714 | int i; | |
715 | ||
716 | if (thermal_get_trip_type(thermal, trip, &type)) | |
717 | return -EINVAL; | |
718 | ||
4ae46bef | 719 | if (type == THERMAL_TRIP_ACTIVE) { |
94a40931 ZR |
720 | unsigned long trip_temp; |
721 | unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature, | |
722 | tz->kelvin_offset); | |
723 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) | |
724 | return -EINVAL; | |
725 | ||
726 | if (temp > trip_temp) { | |
727 | *trend = THERMAL_TREND_RAISING; | |
728 | return 0; | |
729 | } else { | |
730 | /* Fall back on default trend */ | |
731 | return -EINVAL; | |
732 | } | |
4ae46bef | 733 | } |
601f3d42 ZR |
734 | |
735 | /* | |
736 | * tz->temperature has already been updated by generic thermal layer, | |
737 | * before this callback being invoked | |
738 | */ | |
739 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
740 | + (tz->trips.passive.tc2 | |
741 | * (tz->temperature - tz->trips.passive.temperature)); | |
742 | ||
743 | if (i > 0) | |
744 | *trend = THERMAL_TREND_RAISING; | |
745 | else if (i < 0) | |
746 | *trend = THERMAL_TREND_DROPPING; | |
747 | else | |
748 | *trend = THERMAL_TREND_STABLE; | |
749 | return 0; | |
750 | } | |
751 | ||
752 | ||
b1569e99 MG |
753 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
754 | enum thermal_trip_type trip_type) | |
755 | { | |
756 | u8 type = 0; | |
757 | struct acpi_thermal *tz = thermal->devdata; | |
758 | ||
759 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
760 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
761 | else if (trip_type == THERMAL_TRIP_HOT) | |
762 | type = ACPI_THERMAL_NOTIFY_HOT; | |
763 | else | |
764 | return 0; | |
765 | ||
b1569e99 | 766 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 767 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
768 | |
769 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
770 | return 1; | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
3f655ef8 ZR |
775 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
776 | struct thermal_cooling_device *cdev, | |
9d99842f | 777 | bool bind) |
3f655ef8 ZR |
778 | { |
779 | struct acpi_device *device = cdev->devdata; | |
780 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
781 | struct acpi_device *dev; |
782 | acpi_status status; | |
783 | acpi_handle handle; | |
3f655ef8 ZR |
784 | int i; |
785 | int j; | |
786 | int trip = -1; | |
787 | int result = 0; | |
788 | ||
789 | if (tz->trips.critical.flags.valid) | |
790 | trip++; | |
791 | ||
792 | if (tz->trips.hot.flags.valid) | |
793 | trip++; | |
794 | ||
795 | if (tz->trips.passive.flags.valid) { | |
796 | trip++; | |
797 | for (i = 0; i < tz->trips.passive.devices.count; | |
798 | i++) { | |
653a00c9 ZR |
799 | handle = tz->trips.passive.devices.handles[i]; |
800 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
801 | if (ACPI_FAILURE(status) || dev != device) |
802 | continue; | |
803 | if (bind) | |
804 | result = | |
805 | thermal_zone_bind_cooling_device | |
806 | (thermal, trip, cdev, | |
807 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
808 | else | |
809 | result = | |
810 | thermal_zone_unbind_cooling_device | |
811 | (thermal, trip, cdev); | |
812 | if (result) | |
813 | goto failed; | |
3f655ef8 ZR |
814 | } |
815 | } | |
816 | ||
817 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
818 | if (!tz->trips.active[i].flags.valid) | |
819 | break; | |
820 | trip++; | |
821 | for (j = 0; | |
822 | j < tz->trips.active[i].devices.count; | |
823 | j++) { | |
653a00c9 ZR |
824 | handle = tz->trips.active[i].devices.handles[j]; |
825 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
826 | if (ACPI_FAILURE(status) || dev != device) |
827 | continue; | |
828 | if (bind) | |
829 | result = thermal_zone_bind_cooling_device | |
830 | (thermal, trip, cdev, | |
831 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
832 | else | |
833 | result = thermal_zone_unbind_cooling_device | |
834 | (thermal, trip, cdev); | |
835 | if (result) | |
836 | goto failed; | |
3f655ef8 ZR |
837 | } |
838 | } | |
839 | ||
840 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
841 | handle = tz->devices.handles[i]; |
842 | status = acpi_bus_get_device(handle, &dev); | |
843 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
844 | if (bind) |
845 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
846 | (thermal, THERMAL_TRIPS_NONE, |
847 | cdev, THERMAL_NO_LIMIT, | |
9d99842f ZR |
848 | THERMAL_NO_LIMIT); |
849 | else | |
850 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
851 | (thermal, THERMAL_TRIPS_NONE, |
852 | cdev); | |
653a00c9 ZR |
853 | if (result) |
854 | goto failed; | |
855 | } | |
3f655ef8 ZR |
856 | } |
857 | ||
858 | failed: | |
859 | return result; | |
860 | } | |
861 | ||
862 | static int | |
863 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
864 | struct thermal_cooling_device *cdev) | |
865 | { | |
9d99842f | 866 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
867 | } |
868 | ||
869 | static int | |
870 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
871 | struct thermal_cooling_device *cdev) | |
872 | { | |
9d99842f | 873 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
874 | } |
875 | ||
9c8b04be | 876 | static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
877 | .bind = acpi_thermal_bind_cooling_device, |
878 | .unbind = acpi_thermal_unbind_cooling_device, | |
879 | .get_temp = thermal_get_temp, | |
880 | .get_mode = thermal_get_mode, | |
881 | .set_mode = thermal_set_mode, | |
882 | .get_trip_type = thermal_get_trip_type, | |
883 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 884 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 885 | .get_trend = thermal_get_trend, |
b1569e99 | 886 | .notify = thermal_notify, |
3f655ef8 ZR |
887 | }; |
888 | ||
889 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
890 | { | |
891 | int trips = 0; | |
892 | int result; | |
20733939 | 893 | acpi_status status; |
3f655ef8 ZR |
894 | int i; |
895 | ||
896 | if (tz->trips.critical.flags.valid) | |
897 | trips++; | |
898 | ||
899 | if (tz->trips.hot.flags.valid) | |
900 | trips++; | |
901 | ||
902 | if (tz->trips.passive.flags.valid) | |
903 | trips++; | |
904 | ||
905 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
906 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
907 | |
908 | if (tz->trips.passive.flags.valid) | |
909 | tz->thermal_zone = | |
c56f5c03 | 910 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 911 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
912 | tz->trips.passive.tsp*100, |
913 | tz->polling_frequency*100); | |
914 | else | |
915 | tz->thermal_zone = | |
c56f5c03 | 916 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
917 | &acpi_thermal_zone_ops, NULL, |
918 | 0, tz->polling_frequency*100); | |
bb070e43 | 919 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
920 | return -ENODEV; |
921 | ||
922 | result = sysfs_create_link(&tz->device->dev.kobj, | |
923 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
924 | if (result) | |
925 | return result; | |
926 | ||
927 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
928 | &tz->device->dev.kobj, "device"); | |
929 | if (result) | |
930 | return result; | |
931 | ||
20733939 ZR |
932 | status = acpi_attach_data(tz->device->handle, |
933 | acpi_bus_private_data_handler, | |
934 | tz->thermal_zone); | |
935 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
936 | printk(KERN_ERR PREFIX |
937 | "Error attaching device data\n"); | |
20733939 ZR |
938 | return -ENODEV; |
939 | } | |
940 | ||
3f655ef8 ZR |
941 | tz->tz_enabled = 1; |
942 | ||
fc3a8828 GKH |
943 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
944 | tz->thermal_zone->id); | |
3f655ef8 ZR |
945 | return 0; |
946 | } | |
947 | ||
948 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
949 | { | |
950 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
951 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
952 | thermal_zone_device_unregister(tz->thermal_zone); | |
953 | tz->thermal_zone = NULL; | |
20733939 | 954 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
955 | } |
956 | ||
957 | ||
1da177e4 LT |
958 | /* -------------------------------------------------------------------------- |
959 | Driver Interface | |
960 | -------------------------------------------------------------------------- */ | |
961 | ||
342d550d | 962 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 963 | { |
342d550d | 964 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 965 | |
1da177e4 LT |
966 | |
967 | if (!tz) | |
d550d98d | 968 | return; |
1da177e4 | 969 | |
1da177e4 LT |
970 | switch (event) { |
971 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
972 | acpi_thermal_check(tz); | |
973 | break; | |
974 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 975 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 976 | acpi_thermal_check(tz); |
962ce8ca | 977 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 978 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
979 | break; |
980 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
981 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
982 | acpi_thermal_check(tz); | |
962ce8ca | 983 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 984 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
985 | break; |
986 | default: | |
987 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 988 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
989 | break; |
990 | } | |
1da177e4 LT |
991 | } |
992 | ||
261cba2d ZR |
993 | /* |
994 | * On some platforms, the AML code has dependency about | |
995 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
996 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
997 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
998 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
999 | * if _TMP has never been evaluated. | |
1000 | * | |
1001 | * As this dependency is totally transparent to OS, evaluate | |
1002 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
1003 | * _TMP, before they are actually used. | |
1004 | */ | |
1005 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
1006 | { | |
1007 | acpi_handle handle = tz->device->handle; | |
1008 | unsigned long long value; | |
1009 | int i; | |
1010 | ||
1011 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
1012 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
1013 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
1014 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1015 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
1016 | acpi_status status; | |
1017 | ||
1018 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
1019 | if (status == AE_NOT_FOUND) | |
1020 | break; | |
1021 | } | |
1022 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
1023 | } | |
1024 | ||
4be44fcd | 1025 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1026 | { |
4be44fcd | 1027 | int result = 0; |
1da177e4 | 1028 | |
1da177e4 LT |
1029 | |
1030 | if (!tz) | |
d550d98d | 1031 | return -EINVAL; |
1da177e4 | 1032 | |
261cba2d ZR |
1033 | acpi_thermal_aml_dependency_fix(tz); |
1034 | ||
9bcb8118 MG |
1035 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1036 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1037 | if (result) |
d550d98d | 1038 | return result; |
1da177e4 | 1039 | |
9bcb8118 MG |
1040 | /* Get temperature [_TMP] (required) */ |
1041 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1042 | if (result) |
d550d98d | 1043 | return result; |
1da177e4 LT |
1044 | |
1045 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1046 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1047 | if (!result) |
1da177e4 | 1048 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1049 | |
1050 | /* Get default polling frequency [_TZP] (optional) */ | |
1051 | if (tzp) | |
1052 | tz->polling_frequency = tzp; | |
1053 | else | |
1054 | acpi_thermal_get_polling_frequency(tz); | |
1055 | ||
d550d98d | 1056 | return 0; |
1da177e4 LT |
1057 | } |
1058 | ||
13614e37 JD |
1059 | /* |
1060 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1061 | * handles temperature values with a single decimal place. As a consequence, | |
1062 | * some implementations use an offset of 273.1 and others use an offset of | |
1063 | * 273.2. Try to find out which one is being used, to present the most | |
1064 | * accurate and visually appealing number. | |
1065 | * | |
1066 | * The heuristic below should work for all ACPI thermal zones which have a | |
1067 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1068 | */ | |
1069 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1070 | { | |
1071 | if (tz->trips.critical.flags.valid && | |
1072 | (tz->trips.critical.temperature % 5) == 1) | |
1073 | tz->kelvin_offset = 2731; | |
1074 | else | |
1075 | tz->kelvin_offset = 2732; | |
1076 | } | |
1077 | ||
4be44fcd | 1078 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1079 | { |
4be44fcd | 1080 | int result = 0; |
4be44fcd | 1081 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1082 | |
1da177e4 LT |
1083 | |
1084 | if (!device) | |
d550d98d | 1085 | return -EINVAL; |
1da177e4 | 1086 | |
36bcbec7 | 1087 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1088 | if (!tz) |
d550d98d | 1089 | return -ENOMEM; |
1da177e4 | 1090 | |
8348e1b1 | 1091 | tz->device = device; |
1da177e4 LT |
1092 | strcpy(tz->name, device->pnp.bus_id); |
1093 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1094 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1095 | device->driver_data = tz; |
3f655ef8 | 1096 | |
1da177e4 LT |
1097 | result = acpi_thermal_get_info(tz); |
1098 | if (result) | |
3f655ef8 ZR |
1099 | goto free_memory; |
1100 | ||
13614e37 JD |
1101 | acpi_thermal_guess_offset(tz); |
1102 | ||
3f655ef8 ZR |
1103 | result = acpi_thermal_register_thermal_zone(tz); |
1104 | if (result) | |
1105 | goto free_memory; | |
1da177e4 | 1106 | |
1da177e4 | 1107 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", |
4be44fcd LB |
1108 | acpi_device_name(device), acpi_device_bid(device), |
1109 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1110 | goto end; |
1da177e4 | 1111 | |
3f655ef8 ZR |
1112 | free_memory: |
1113 | kfree(tz); | |
1114 | end: | |
d550d98d | 1115 | return result; |
1da177e4 LT |
1116 | } |
1117 | ||
51fac838 | 1118 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1119 | { |
4be44fcd | 1120 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1121 | |
1da177e4 | 1122 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1123 | return -EINVAL; |
1da177e4 | 1124 | |
50dd0969 | 1125 | tz = acpi_driver_data(device); |
1da177e4 | 1126 | |
3f655ef8 | 1127 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1128 | kfree(tz); |
d550d98d | 1129 | return 0; |
1da177e4 LT |
1130 | } |
1131 | ||
90692404 | 1132 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 1133 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1134 | { |
167cffb6 | 1135 | struct acpi_thermal *tz; |
b1028c54 KK |
1136 | int i, j, power_state, result; |
1137 | ||
167cffb6 | 1138 | if (!dev) |
d550d98d | 1139 | return -EINVAL; |
74ce1468 | 1140 | |
167cffb6 RW |
1141 | tz = acpi_driver_data(to_acpi_device(dev)); |
1142 | if (!tz) | |
1143 | return -EINVAL; | |
74ce1468 | 1144 | |
bed936f7 | 1145 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1146 | if (!(&tz->trips.active[i])) |
1147 | break; | |
1148 | if (!tz->trips.active[i].flags.valid) | |
1149 | break; | |
1150 | tz->trips.active[i].flags.enabled = 1; | |
1151 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1152 | result = acpi_bus_update_power( |
1153 | tz->trips.active[i].devices.handles[j], | |
1154 | &power_state); | |
b1028c54 KK |
1155 | if (result || (power_state != ACPI_STATE_D0)) { |
1156 | tz->trips.active[i].flags.enabled = 0; | |
1157 | break; | |
1158 | } | |
bed936f7 | 1159 | } |
b1028c54 | 1160 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1161 | } |
1162 | ||
b1028c54 | 1163 | acpi_thermal_check(tz); |
74ce1468 KK |
1164 | |
1165 | return AE_OK; | |
1166 | } | |
90692404 | 1167 | #endif |
74ce1468 | 1168 | |
1855256c | 1169 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1170 | |
1171 | if (act == 0) { | |
1172 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1173 | "disabling all active thermal trip points\n", d->ident); | |
1174 | act = -1; | |
1175 | } | |
1176 | return 0; | |
1177 | } | |
1855256c | 1178 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1179 | |
1180 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1181 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1182 | nocrt = 1; | |
1183 | return 0; | |
1184 | } | |
1855256c | 1185 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1186 | |
1187 | if (tzp == 0) { | |
1188 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1189 | "enabling thermal zone polling\n", d->ident); | |
1190 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1191 | } | |
1192 | return 0; | |
1193 | } | |
1855256c | 1194 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1195 | |
1196 | if (psv == 0) { | |
1197 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1198 | "disabling all passive thermal trip points\n", d->ident); | |
1199 | psv = -1; | |
1200 | } | |
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1205 | /* | |
1206 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1207 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1208 | */ | |
1209 | { | |
1210 | .callback = thermal_act, | |
1211 | .ident = "AOpen i915GMm-HFS", | |
1212 | .matches = { | |
1213 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1214 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1215 | }, | |
1216 | }, | |
1217 | { | |
1218 | .callback = thermal_psv, | |
1219 | .ident = "AOpen i915GMm-HFS", | |
1220 | .matches = { | |
1221 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1222 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1223 | }, | |
1224 | }, | |
1225 | { | |
1226 | .callback = thermal_tzp, | |
1227 | .ident = "AOpen i915GMm-HFS", | |
1228 | .matches = { | |
1229 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1230 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1231 | }, | |
1232 | }, | |
8c99fdce LB |
1233 | { |
1234 | .callback = thermal_nocrt, | |
1235 | .ident = "Gigabyte GA-7ZX", | |
1236 | .matches = { | |
1237 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1238 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1239 | }, | |
1240 | }, | |
0b5bfa1c LB |
1241 | {} |
1242 | }; | |
0b5bfa1c | 1243 | |
4be44fcd | 1244 | static int __init acpi_thermal_init(void) |
1da177e4 | 1245 | { |
4be44fcd | 1246 | int result = 0; |
1da177e4 | 1247 | |
0b5bfa1c LB |
1248 | dmi_check_system(thermal_dmi_table); |
1249 | ||
72b33ef8 LB |
1250 | if (off) { |
1251 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1252 | return -ENODEV; | |
1253 | } | |
43d9f87b | 1254 | |
1da177e4 | 1255 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
c57b62f5 | 1256 | if (result < 0) |
d550d98d | 1257 | return -ENODEV; |
1da177e4 | 1258 | |
d550d98d | 1259 | return 0; |
1da177e4 LT |
1260 | } |
1261 | ||
4be44fcd | 1262 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1263 | { |
1da177e4 LT |
1264 | |
1265 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1266 | ||
d550d98d | 1267 | return; |
1da177e4 LT |
1268 | } |
1269 | ||
1da177e4 LT |
1270 | module_init(acpi_thermal_init); |
1271 | module_exit(acpi_thermal_exit); |