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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) | |
4 | * | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
7 | * | |
1da177e4 LT |
8 | * This driver fully implements the ACPI thermal policy as described in the |
9 | * ACPI 2.0 Specification. | |
10 | * | |
11 | * TBD: 1. Implement passive cooling hysteresis. | |
12 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
13 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
1da177e4 LT |
14 | */ |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
0b5bfa1c | 18 | #include <linux/dmi.h> |
1da177e4 | 19 | #include <linux/init.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 | 21 | #include <linux/types.h> |
cd354f1a | 22 | #include <linux/jiffies.h> |
1da177e4 | 23 | #include <linux/kmod.h> |
10a0a8d4 | 24 | #include <linux/reboot.h> |
f6f5c45e | 25 | #include <linux/device.h> |
3f655ef8 | 26 | #include <linux/thermal.h> |
8b48463f | 27 | #include <linux/acpi.h> |
a59ffb20 | 28 | #include <linux/workqueue.h> |
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
7f49a5cb | 30 | #include <linux/units.h> |
1da177e4 | 31 | |
a192a958 LB |
32 | #define PREFIX "ACPI: " |
33 | ||
1da177e4 | 34 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 | 35 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
1da177e4 LT |
36 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 |
37 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
38 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
39 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
40 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
41 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
42 | |
43 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
44 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
45 | ||
1da177e4 | 46 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 47 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 48 | |
1cbf4c56 | 49 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 50 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
51 | MODULE_LICENSE("GPL"); |
52 | ||
f8707ec9 LB |
53 | static int act; |
54 | module_param(act, int, 0644); | |
3c1d36da | 55 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 56 | |
c52a7419 LB |
57 | static int crt; |
58 | module_param(crt, int, 0644); | |
59 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
60 | ||
1da177e4 | 61 | static int tzp; |
730ff34d | 62 | module_param(tzp, int, 0444); |
3c1d36da | 63 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 64 | |
f5487145 LB |
65 | static int nocrt; |
66 | module_param(nocrt, int, 0); | |
8c99fdce | 67 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 68 | |
72b33ef8 LB |
69 | static int off; |
70 | module_param(off, int, 0); | |
3c1d36da | 71 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 72 | |
a70cdc52 LB |
73 | static int psv; |
74 | module_param(psv, int, 0644); | |
3c1d36da | 75 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 76 | |
a59ffb20 AL |
77 | static struct workqueue_struct *acpi_thermal_pm_queue; |
78 | ||
4be44fcd | 79 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 80 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 81 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 82 | |
1ba90e3a TR |
83 | static const struct acpi_device_id thermal_device_ids[] = { |
84 | {ACPI_THERMAL_HID, 0}, | |
85 | {"", 0}, | |
86 | }; | |
87 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
88 | ||
90692404 | 89 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 | 90 | static int acpi_thermal_suspend(struct device *dev); |
167cffb6 | 91 | static int acpi_thermal_resume(struct device *dev); |
fae9e2a4 | 92 | #else |
a59ffb20 | 93 | #define acpi_thermal_suspend NULL |
fae9e2a4 | 94 | #define acpi_thermal_resume NULL |
90692404 | 95 | #endif |
a59ffb20 | 96 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); |
167cffb6 | 97 | |
1da177e4 | 98 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 99 | .name = "thermal", |
4be44fcd | 100 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 101 | .ids = thermal_device_ids, |
4be44fcd LB |
102 | .ops = { |
103 | .add = acpi_thermal_add, | |
104 | .remove = acpi_thermal_remove, | |
342d550d | 105 | .notify = acpi_thermal_notify, |
4be44fcd | 106 | }, |
167cffb6 | 107 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
108 | }; |
109 | ||
110 | struct acpi_thermal_state { | |
4be44fcd LB |
111 | u8 critical:1; |
112 | u8 hot:1; | |
113 | u8 passive:1; | |
114 | u8 active:1; | |
115 | u8 reserved:4; | |
116 | int active_index; | |
1da177e4 LT |
117 | }; |
118 | ||
119 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
120 | u8 valid:1; |
121 | u8 enabled:1; | |
122 | u8 reserved:6; | |
1da177e4 LT |
123 | }; |
124 | ||
125 | struct acpi_thermal_critical { | |
126 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 127 | unsigned long temperature; |
1da177e4 LT |
128 | }; |
129 | ||
130 | struct acpi_thermal_hot { | |
131 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 132 | unsigned long temperature; |
1da177e4 LT |
133 | }; |
134 | ||
135 | struct acpi_thermal_passive { | |
136 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
137 | unsigned long temperature; |
138 | unsigned long tc1; | |
139 | unsigned long tc2; | |
140 | unsigned long tsp; | |
141 | struct acpi_handle_list devices; | |
1da177e4 LT |
142 | }; |
143 | ||
144 | struct acpi_thermal_active { | |
145 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
146 | unsigned long temperature; |
147 | struct acpi_handle_list devices; | |
1da177e4 LT |
148 | }; |
149 | ||
150 | struct acpi_thermal_trips { | |
151 | struct acpi_thermal_critical critical; | |
4be44fcd | 152 | struct acpi_thermal_hot hot; |
1da177e4 LT |
153 | struct acpi_thermal_passive passive; |
154 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
155 | }; | |
156 | ||
157 | struct acpi_thermal_flags { | |
4be44fcd LB |
158 | u8 cooling_mode:1; /* _SCP */ |
159 | u8 devices:1; /* _TZD */ | |
160 | u8 reserved:6; | |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_thermal { | |
8348e1b1 | 164 | struct acpi_device * device; |
4be44fcd LB |
165 | acpi_bus_id name; |
166 | unsigned long temperature; | |
167 | unsigned long last_temperature; | |
168 | unsigned long polling_frequency; | |
4be44fcd | 169 | volatile u8 zombie; |
1da177e4 LT |
170 | struct acpi_thermal_flags flags; |
171 | struct acpi_thermal_state state; | |
172 | struct acpi_thermal_trips trips; | |
4be44fcd | 173 | struct acpi_handle_list devices; |
3f655ef8 ZR |
174 | struct thermal_zone_device *thermal_zone; |
175 | int tz_enabled; | |
7f49a5cb | 176 | int kelvin_offset; /* in millidegrees */ |
a59ffb20 | 177 | struct work_struct thermal_check_work; |
1da177e4 LT |
178 | }; |
179 | ||
1da177e4 LT |
180 | /* -------------------------------------------------------------------------- |
181 | Thermal Zone Management | |
182 | -------------------------------------------------------------------------- */ | |
183 | ||
4be44fcd | 184 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 185 | { |
4be44fcd | 186 | acpi_status status = AE_OK; |
27663c58 | 187 | unsigned long long tmp; |
1da177e4 LT |
188 | |
189 | if (!tz) | |
d550d98d | 190 | return -EINVAL; |
1da177e4 LT |
191 | |
192 | tz->last_temperature = tz->temperature; | |
193 | ||
27663c58 | 194 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 195 | if (ACPI_FAILURE(status)) |
d550d98d | 196 | return -ENODEV; |
1da177e4 | 197 | |
27663c58 | 198 | tz->temperature = tmp; |
4be44fcd LB |
199 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
200 | tz->temperature)); | |
1da177e4 | 201 | |
d550d98d | 202 | return 0; |
1da177e4 LT |
203 | } |
204 | ||
4be44fcd | 205 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 206 | { |
4be44fcd | 207 | acpi_status status = AE_OK; |
27663c58 | 208 | unsigned long long tmp; |
1da177e4 LT |
209 | |
210 | if (!tz) | |
d550d98d | 211 | return -EINVAL; |
1da177e4 | 212 | |
27663c58 | 213 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 214 | if (ACPI_FAILURE(status)) |
d550d98d | 215 | return -ENODEV; |
1da177e4 | 216 | |
27663c58 | 217 | tz->polling_frequency = tmp; |
4be44fcd LB |
218 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
219 | tz->polling_frequency)); | |
1da177e4 | 220 | |
d550d98d | 221 | return 0; |
1da177e4 LT |
222 | } |
223 | ||
4be44fcd | 224 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 225 | { |
1da177e4 | 226 | if (!tz) |
d550d98d | 227 | return -EINVAL; |
1da177e4 | 228 | |
e88c7409 KS |
229 | if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, |
230 | "_SCP", mode))) | |
d550d98d | 231 | return -ENODEV; |
1da177e4 | 232 | |
d550d98d | 233 | return 0; |
1da177e4 LT |
234 | } |
235 | ||
ce44e197 ZR |
236 | #define ACPI_TRIPS_CRITICAL 0x01 |
237 | #define ACPI_TRIPS_HOT 0x02 | |
238 | #define ACPI_TRIPS_PASSIVE 0x04 | |
239 | #define ACPI_TRIPS_ACTIVE 0x08 | |
240 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 241 | |
ce44e197 ZR |
242 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
243 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 244 | |
ce44e197 ZR |
245 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
246 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
247 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 248 | |
ce44e197 ZR |
249 | /* |
250 | * This exception is thrown out in two cases: | |
251 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
252 | * when re-evaluating the AML code. | |
253 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
254 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
255 | */ | |
256 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
257 | do { \ | |
258 | if (flags != ACPI_TRIPS_INIT) \ | |
259 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
260 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 261 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
262 | } while (0) |
263 | ||
264 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
265 | { | |
266 | acpi_status status = AE_OK; | |
27663c58 | 267 | unsigned long long tmp; |
ce44e197 ZR |
268 | struct acpi_handle_list devices; |
269 | int valid = 0; | |
270 | int i; | |
1da177e4 | 271 | |
fa809452 | 272 | /* Critical Shutdown */ |
ce44e197 ZR |
273 | if (flag & ACPI_TRIPS_CRITICAL) { |
274 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
275 | "_CRT", NULL, &tmp); |
276 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
277 | /* |
278 | * Treat freezing temperatures as invalid as well; some | |
279 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 280 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
281 | * ... so lets discard those as invalid. |
282 | */ | |
fa809452 TR |
283 | if (ACPI_FAILURE(status)) { |
284 | tz->trips.critical.flags.valid = 0; | |
285 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
286 | "No critical threshold\n")); | |
287 | } else if (tmp <= 2732) { | |
766a8a6d AS |
288 | pr_warn(FW_BUG "Invalid critical threshold (%llu)\n", |
289 | tmp); | |
c52a7419 | 290 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
291 | } else { |
292 | tz->trips.critical.flags.valid = 1; | |
293 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
294 | "Found critical threshold [%lu]\n", |
295 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
296 | } |
297 | if (tz->trips.critical.flags.valid == 1) { | |
298 | if (crt == -1) { | |
299 | tz->trips.critical.flags.valid = 0; | |
300 | } else if (crt > 0) { | |
7f49a5cb AM |
301 | unsigned long crt_k = celsius_to_deci_kelvin(crt); |
302 | ||
ce44e197 | 303 | /* |
22a94d79 | 304 | * Allow override critical threshold |
ce44e197 | 305 | */ |
22a94d79 | 306 | if (crt_k > tz->trips.critical.temperature) |
766a8a6d AS |
307 | pr_warn(PREFIX "Critical threshold %d C\n", |
308 | crt); | |
22a94d79 | 309 | tz->trips.critical.temperature = crt_k; |
ce44e197 | 310 | } |
c52a7419 LB |
311 | } |
312 | } | |
313 | ||
1da177e4 | 314 | /* Critical Sleep (optional) */ |
ce44e197 | 315 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 316 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 317 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
318 | if (ACPI_FAILURE(status)) { |
319 | tz->trips.hot.flags.valid = 0; | |
320 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
321 | "No hot threshold\n")); | |
322 | } else { | |
27663c58 | 323 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
324 | tz->trips.hot.flags.valid = 1; |
325 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
326 | "Found hot threshold [%lu]\n", | |
ee17fdf2 | 327 | tz->trips.hot.temperature)); |
ce44e197 | 328 | } |
a70cdc52 LB |
329 | } |
330 | ||
ce44e197 | 331 | /* Passive (optional) */ |
0e4240d9 ZR |
332 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
333 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
334 | valid = tz->trips.passive.flags.valid; |
335 | if (psv == -1) { | |
336 | status = AE_SUPPORT; | |
337 | } else if (psv > 0) { | |
7f49a5cb | 338 | tmp = celsius_to_deci_kelvin(psv); |
ce44e197 ZR |
339 | status = AE_OK; |
340 | } else { | |
341 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 342 | "_PSV", NULL, &tmp); |
ce44e197 | 343 | } |
1da177e4 | 344 | |
1da177e4 LT |
345 | if (ACPI_FAILURE(status)) |
346 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 347 | else { |
27663c58 | 348 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
349 | tz->trips.passive.flags.valid = 1; |
350 | if (flag == ACPI_TRIPS_INIT) { | |
351 | status = acpi_evaluate_integer( | |
352 | tz->device->handle, "_TC1", | |
27663c58 | 353 | NULL, &tmp); |
ce44e197 ZR |
354 | if (ACPI_FAILURE(status)) |
355 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
356 | else |
357 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
358 | status = acpi_evaluate_integer( |
359 | tz->device->handle, "_TC2", | |
27663c58 | 360 | NULL, &tmp); |
ce44e197 ZR |
361 | if (ACPI_FAILURE(status)) |
362 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
363 | else |
364 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
365 | status = acpi_evaluate_integer( |
366 | tz->device->handle, "_TSP", | |
27663c58 | 367 | NULL, &tmp); |
ce44e197 ZR |
368 | if (ACPI_FAILURE(status)) |
369 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
370 | else |
371 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
372 | } |
373 | } | |
374 | } | |
375 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
376 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
377 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
378 | NULL, &devices); | |
0e4240d9 | 379 | if (ACPI_FAILURE(status)) { |
766a8a6d | 380 | pr_warn(PREFIX "Invalid passive threshold\n"); |
1da177e4 | 381 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 382 | } |
1da177e4 | 383 | else |
ce44e197 | 384 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 385 | |
ce44e197 ZR |
386 | if (memcmp(&tz->trips.passive.devices, &devices, |
387 | sizeof(struct acpi_handle_list))) { | |
388 | memcpy(&tz->trips.passive.devices, &devices, | |
389 | sizeof(struct acpi_handle_list)); | |
390 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
391 | } | |
392 | } | |
393 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
394 | if (valid != tz->trips.passive.flags.valid) | |
395 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
396 | } | |
1da177e4 | 397 | |
ce44e197 | 398 | /* Active (optional) */ |
4be44fcd | 399 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 400 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 401 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 402 | |
f8707ec9 | 403 | if (act == -1) |
ce44e197 ZR |
404 | break; /* disable all active trip points */ |
405 | ||
0e4240d9 ZR |
406 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
407 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 408 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 409 | name, NULL, &tmp); |
ce44e197 ZR |
410 | if (ACPI_FAILURE(status)) { |
411 | tz->trips.active[i].flags.valid = 0; | |
412 | if (i == 0) | |
413 | break; | |
414 | if (act <= 0) | |
415 | break; | |
416 | if (i == 1) | |
417 | tz->trips.active[0].temperature = | |
7f49a5cb | 418 | celsius_to_deci_kelvin(act); |
ce44e197 ZR |
419 | else |
420 | /* | |
421 | * Don't allow override higher than | |
422 | * the next higher trip point | |
423 | */ | |
424 | tz->trips.active[i - 1].temperature = | |
425 | (tz->trips.active[i - 2].temperature < | |
7f49a5cb | 426 | celsius_to_deci_kelvin(act) ? |
ce44e197 | 427 | tz->trips.active[i - 2].temperature : |
7f49a5cb | 428 | celsius_to_deci_kelvin(act)); |
f8707ec9 | 429 | break; |
27663c58 MW |
430 | } else { |
431 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 432 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 433 | } |
f8707ec9 | 434 | } |
1da177e4 LT |
435 | |
436 | name[2] = 'L'; | |
ce44e197 ZR |
437 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
438 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
439 | status = acpi_evaluate_reference(tz->device->handle, | |
440 | name, NULL, &devices); | |
0e4240d9 | 441 | if (ACPI_FAILURE(status)) { |
766a8a6d AS |
442 | pr_warn(PREFIX "Invalid active%d threshold\n", |
443 | i); | |
ce44e197 | 444 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 445 | } |
ce44e197 ZR |
446 | else |
447 | tz->trips.active[i].flags.valid = 1; | |
448 | ||
449 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
450 | sizeof(struct acpi_handle_list))) { | |
451 | memcpy(&tz->trips.active[i].devices, &devices, | |
452 | sizeof(struct acpi_handle_list)); | |
453 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
454 | } | |
455 | } | |
456 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
457 | if (valid != tz->trips.active[i].flags.valid) | |
458 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
459 | ||
460 | if (!tz->trips.active[i].flags.valid) | |
461 | break; | |
462 | } | |
463 | ||
e88c7409 | 464 | if (flag & ACPI_TRIPS_DEVICES) { |
668e0200 | 465 | memset(&devices, 0, sizeof(devices)); |
ce44e197 ZR |
466 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
467 | NULL, &devices); | |
668e0200 LT |
468 | if (ACPI_SUCCESS(status) |
469 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
470 | tz->devices = devices; | |
ce44e197 ZR |
471 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
472 | } | |
1da177e4 LT |
473 | } |
474 | ||
d550d98d | 475 | return 0; |
1da177e4 LT |
476 | } |
477 | ||
ce44e197 | 478 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 479 | { |
8b7ef6d8 TR |
480 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
481 | ||
482 | if (ret) | |
483 | return ret; | |
484 | ||
485 | valid = tz->trips.critical.flags.valid | | |
486 | tz->trips.hot.flags.valid | | |
487 | tz->trips.passive.flags.valid; | |
488 | ||
489 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
490 | valid |= tz->trips.active[i].flags.valid; | |
491 | ||
492 | if (!valid) { | |
766a8a6d | 493 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
494 | return -ENODEV; |
495 | } | |
496 | return 0; | |
1da177e4 LT |
497 | } |
498 | ||
4be44fcd | 499 | static void acpi_thermal_check(void *data) |
1da177e4 | 500 | { |
50dd0969 | 501 | struct acpi_thermal *tz = data; |
1da177e4 | 502 | |
e994d713 | 503 | if (!tz->tz_enabled) |
ca4e7130 | 504 | return; |
e994d713 | 505 | |
0e70f466 SP |
506 | thermal_zone_device_update(tz->thermal_zone, |
507 | THERMAL_EVENT_UNSPECIFIED); | |
1da177e4 LT |
508 | } |
509 | ||
3f655ef8 | 510 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 511 | |
17e8351a | 512 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
513 | { |
514 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 515 | int result; |
3f655ef8 ZR |
516 | |
517 | if (!tz) | |
518 | return -EINVAL; | |
519 | ||
76ecb4f2 ZR |
520 | result = acpi_thermal_get_temperature(tz); |
521 | if (result) | |
522 | return result; | |
523 | ||
7f49a5cb | 524 | *temp = deci_kelvin_to_millicelsius_with_offset(tz->temperature, |
7b83fd9d | 525 | tz->kelvin_offset); |
6503e5df | 526 | return 0; |
3f655ef8 ZR |
527 | } |
528 | ||
3f655ef8 | 529 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 530 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
531 | { |
532 | struct acpi_thermal *tz = thermal->devdata; | |
533 | ||
534 | if (!tz) | |
535 | return -EINVAL; | |
536 | ||
6503e5df MG |
537 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
538 | THERMAL_DEVICE_DISABLED; | |
539 | ||
540 | return 0; | |
3f655ef8 ZR |
541 | } |
542 | ||
543 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 544 | enum thermal_device_mode mode) |
3f655ef8 ZR |
545 | { |
546 | struct acpi_thermal *tz = thermal->devdata; | |
547 | int enable; | |
548 | ||
549 | if (!tz) | |
550 | return -EINVAL; | |
551 | ||
552 | /* | |
553 | * enable/disable thermal management from ACPI thermal driver | |
554 | */ | |
6503e5df | 555 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 556 | enable = 1; |
e994d713 | 557 | else if (mode == THERMAL_DEVICE_DISABLED) { |
3f655ef8 | 558 | enable = 0; |
e994d713 SP |
559 | pr_warn("thermal zone will be disabled\n"); |
560 | } else | |
3f655ef8 ZR |
561 | return -EINVAL; |
562 | ||
563 | if (enable != tz->tz_enabled) { | |
564 | tz->tz_enabled = enable; | |
565 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
566 | "%s kernel ACPI thermal control\n", |
567 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
568 | acpi_thermal_check(tz); |
569 | } | |
570 | return 0; | |
571 | } | |
572 | ||
573 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 574 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
575 | { |
576 | struct acpi_thermal *tz = thermal->devdata; | |
577 | int i; | |
578 | ||
579 | if (!tz || trip < 0) | |
580 | return -EINVAL; | |
581 | ||
582 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
583 | if (!trip) { |
584 | *type = THERMAL_TRIP_CRITICAL; | |
585 | return 0; | |
586 | } | |
3f655ef8 ZR |
587 | trip--; |
588 | } | |
589 | ||
590 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
591 | if (!trip) { |
592 | *type = THERMAL_TRIP_HOT; | |
593 | return 0; | |
594 | } | |
3f655ef8 ZR |
595 | trip--; |
596 | } | |
597 | ||
598 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
599 | if (!trip) { |
600 | *type = THERMAL_TRIP_PASSIVE; | |
601 | return 0; | |
602 | } | |
3f655ef8 ZR |
603 | trip--; |
604 | } | |
605 | ||
606 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
607 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
608 | if (!trip) { |
609 | *type = THERMAL_TRIP_ACTIVE; | |
610 | return 0; | |
611 | } | |
3f655ef8 ZR |
612 | trip--; |
613 | } | |
614 | ||
615 | return -EINVAL; | |
616 | } | |
617 | ||
618 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 619 | int trip, int *temp) |
3f655ef8 ZR |
620 | { |
621 | struct acpi_thermal *tz = thermal->devdata; | |
622 | int i; | |
623 | ||
624 | if (!tz || trip < 0) | |
625 | return -EINVAL; | |
626 | ||
627 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 628 | if (!trip) { |
7f49a5cb | 629 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
630 | tz->trips.critical.temperature, |
631 | tz->kelvin_offset); | |
6503e5df MG |
632 | return 0; |
633 | } | |
3f655ef8 ZR |
634 | trip--; |
635 | } | |
636 | ||
637 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 638 | if (!trip) { |
7f49a5cb | 639 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
640 | tz->trips.hot.temperature, |
641 | tz->kelvin_offset); | |
6503e5df MG |
642 | return 0; |
643 | } | |
3f655ef8 ZR |
644 | trip--; |
645 | } | |
646 | ||
647 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 648 | if (!trip) { |
7f49a5cb | 649 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
650 | tz->trips.passive.temperature, |
651 | tz->kelvin_offset); | |
6503e5df MG |
652 | return 0; |
653 | } | |
3f655ef8 ZR |
654 | trip--; |
655 | } | |
656 | ||
657 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
658 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 659 | if (!trip) { |
7f49a5cb | 660 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
661 | tz->trips.active[i].temperature, |
662 | tz->kelvin_offset); | |
6503e5df MG |
663 | return 0; |
664 | } | |
3f655ef8 ZR |
665 | trip--; |
666 | } | |
667 | ||
668 | return -EINVAL; | |
669 | } | |
670 | ||
9ec732ff | 671 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
672 | int *temperature) |
673 | { | |
9ec732ff ZR |
674 | struct acpi_thermal *tz = thermal->devdata; |
675 | ||
676 | if (tz->trips.critical.flags.valid) { | |
7f49a5cb | 677 | *temperature = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
678 | tz->trips.critical.temperature, |
679 | tz->kelvin_offset); | |
9ec732ff ZR |
680 | return 0; |
681 | } else | |
682 | return -EINVAL; | |
683 | } | |
684 | ||
601f3d42 ZR |
685 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
686 | int trip, enum thermal_trend *trend) | |
687 | { | |
688 | struct acpi_thermal *tz = thermal->devdata; | |
689 | enum thermal_trip_type type; | |
690 | int i; | |
691 | ||
692 | if (thermal_get_trip_type(thermal, trip, &type)) | |
693 | return -EINVAL; | |
694 | ||
4ae46bef | 695 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a | 696 | int trip_temp; |
7f49a5cb | 697 | int temp = deci_kelvin_to_millicelsius_with_offset( |
7b83fd9d | 698 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
699 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
700 | return -EINVAL; | |
701 | ||
702 | if (temp > trip_temp) { | |
703 | *trend = THERMAL_TREND_RAISING; | |
704 | return 0; | |
705 | } else { | |
706 | /* Fall back on default trend */ | |
707 | return -EINVAL; | |
708 | } | |
4ae46bef | 709 | } |
601f3d42 ZR |
710 | |
711 | /* | |
712 | * tz->temperature has already been updated by generic thermal layer, | |
713 | * before this callback being invoked | |
714 | */ | |
715 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
716 | + (tz->trips.passive.tc2 | |
717 | * (tz->temperature - tz->trips.passive.temperature)); | |
718 | ||
719 | if (i > 0) | |
720 | *trend = THERMAL_TREND_RAISING; | |
721 | else if (i < 0) | |
722 | *trend = THERMAL_TREND_DROPPING; | |
723 | else | |
724 | *trend = THERMAL_TREND_STABLE; | |
725 | return 0; | |
726 | } | |
727 | ||
728 | ||
b1569e99 MG |
729 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
730 | enum thermal_trip_type trip_type) | |
731 | { | |
732 | u8 type = 0; | |
733 | struct acpi_thermal *tz = thermal->devdata; | |
734 | ||
735 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
736 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
737 | else if (trip_type == THERMAL_TRIP_HOT) | |
738 | type = ACPI_THERMAL_NOTIFY_HOT; | |
739 | else | |
740 | return 0; | |
741 | ||
b1569e99 | 742 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 743 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
744 | |
745 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
746 | return 1; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
3f655ef8 ZR |
751 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
752 | struct thermal_cooling_device *cdev, | |
9d99842f | 753 | bool bind) |
3f655ef8 ZR |
754 | { |
755 | struct acpi_device *device = cdev->devdata; | |
756 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
757 | struct acpi_device *dev; |
758 | acpi_status status; | |
759 | acpi_handle handle; | |
3f655ef8 ZR |
760 | int i; |
761 | int j; | |
762 | int trip = -1; | |
763 | int result = 0; | |
764 | ||
765 | if (tz->trips.critical.flags.valid) | |
766 | trip++; | |
767 | ||
768 | if (tz->trips.hot.flags.valid) | |
769 | trip++; | |
770 | ||
771 | if (tz->trips.passive.flags.valid) { | |
772 | trip++; | |
773 | for (i = 0; i < tz->trips.passive.devices.count; | |
774 | i++) { | |
653a00c9 ZR |
775 | handle = tz->trips.passive.devices.handles[i]; |
776 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
777 | if (ACPI_FAILURE(status) || dev != device) |
778 | continue; | |
779 | if (bind) | |
780 | result = | |
781 | thermal_zone_bind_cooling_device | |
782 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
783 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
784 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
785 | else |
786 | result = | |
787 | thermal_zone_unbind_cooling_device | |
788 | (thermal, trip, cdev); | |
789 | if (result) | |
790 | goto failed; | |
3f655ef8 ZR |
791 | } |
792 | } | |
793 | ||
794 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
795 | if (!tz->trips.active[i].flags.valid) | |
796 | break; | |
797 | trip++; | |
798 | for (j = 0; | |
799 | j < tz->trips.active[i].devices.count; | |
800 | j++) { | |
653a00c9 ZR |
801 | handle = tz->trips.active[i].devices.handles[j]; |
802 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
803 | if (ACPI_FAILURE(status) || dev != device) |
804 | continue; | |
805 | if (bind) | |
806 | result = thermal_zone_bind_cooling_device | |
807 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
808 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
809 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
810 | else |
811 | result = thermal_zone_unbind_cooling_device | |
812 | (thermal, trip, cdev); | |
813 | if (result) | |
814 | goto failed; | |
3f655ef8 ZR |
815 | } |
816 | } | |
817 | ||
818 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
819 | handle = tz->devices.handles[i]; |
820 | status = acpi_bus_get_device(handle, &dev); | |
821 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
822 | if (bind) |
823 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
824 | (thermal, THERMAL_TRIPS_NONE, |
825 | cdev, THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
826 | THERMAL_NO_LIMIT, |
827 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
828 | else |
829 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
830 | (thermal, THERMAL_TRIPS_NONE, |
831 | cdev); | |
653a00c9 ZR |
832 | if (result) |
833 | goto failed; | |
834 | } | |
3f655ef8 ZR |
835 | } |
836 | ||
837 | failed: | |
838 | return result; | |
839 | } | |
840 | ||
841 | static int | |
842 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
843 | struct thermal_cooling_device *cdev) | |
844 | { | |
9d99842f | 845 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
846 | } |
847 | ||
848 | static int | |
849 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
850 | struct thermal_cooling_device *cdev) | |
851 | { | |
9d99842f | 852 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
853 | } |
854 | ||
ec9c9c2e | 855 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
856 | .bind = acpi_thermal_bind_cooling_device, |
857 | .unbind = acpi_thermal_unbind_cooling_device, | |
858 | .get_temp = thermal_get_temp, | |
859 | .get_mode = thermal_get_mode, | |
860 | .set_mode = thermal_set_mode, | |
861 | .get_trip_type = thermal_get_trip_type, | |
862 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 863 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 864 | .get_trend = thermal_get_trend, |
b1569e99 | 865 | .notify = thermal_notify, |
3f655ef8 ZR |
866 | }; |
867 | ||
868 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
869 | { | |
870 | int trips = 0; | |
871 | int result; | |
20733939 | 872 | acpi_status status; |
3f655ef8 ZR |
873 | int i; |
874 | ||
875 | if (tz->trips.critical.flags.valid) | |
876 | trips++; | |
877 | ||
878 | if (tz->trips.hot.flags.valid) | |
879 | trips++; | |
880 | ||
881 | if (tz->trips.passive.flags.valid) | |
882 | trips++; | |
883 | ||
884 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
885 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
886 | |
887 | if (tz->trips.passive.flags.valid) | |
888 | tz->thermal_zone = | |
c56f5c03 | 889 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 890 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
891 | tz->trips.passive.tsp*100, |
892 | tz->polling_frequency*100); | |
893 | else | |
894 | tz->thermal_zone = | |
c56f5c03 | 895 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
896 | &acpi_thermal_zone_ops, NULL, |
897 | 0, tz->polling_frequency*100); | |
bb070e43 | 898 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
899 | return -ENODEV; |
900 | ||
901 | result = sysfs_create_link(&tz->device->dev.kobj, | |
902 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
903 | if (result) | |
904 | return result; | |
905 | ||
906 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
907 | &tz->device->dev.kobj, "device"); | |
908 | if (result) | |
909 | return result; | |
910 | ||
e6f8a4d6 LT |
911 | status = acpi_bus_attach_private_data(tz->device->handle, |
912 | tz->thermal_zone); | |
913 | if (ACPI_FAILURE(status)) | |
20733939 | 914 | return -ENODEV; |
20733939 | 915 | |
3f655ef8 ZR |
916 | tz->tz_enabled = 1; |
917 | ||
fc3a8828 GKH |
918 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
919 | tz->thermal_zone->id); | |
3f655ef8 ZR |
920 | return 0; |
921 | } | |
922 | ||
923 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
924 | { | |
925 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
926 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
927 | thermal_zone_device_unregister(tz->thermal_zone); | |
928 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 929 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
930 | } |
931 | ||
932 | ||
1da177e4 LT |
933 | /* -------------------------------------------------------------------------- |
934 | Driver Interface | |
935 | -------------------------------------------------------------------------- */ | |
936 | ||
342d550d | 937 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 938 | { |
342d550d | 939 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 940 | |
1da177e4 LT |
941 | |
942 | if (!tz) | |
d550d98d | 943 | return; |
1da177e4 | 944 | |
1da177e4 LT |
945 | switch (event) { |
946 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
947 | acpi_thermal_check(tz); | |
948 | break; | |
949 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 950 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 951 | acpi_thermal_check(tz); |
962ce8ca | 952 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 953 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
954 | break; |
955 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
956 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
957 | acpi_thermal_check(tz); | |
962ce8ca | 958 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 959 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
960 | break; |
961 | default: | |
962 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 963 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
964 | break; |
965 | } | |
1da177e4 LT |
966 | } |
967 | ||
261cba2d ZR |
968 | /* |
969 | * On some platforms, the AML code has dependency about | |
970 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
971 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
972 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
973 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
974 | * if _TMP has never been evaluated. | |
975 | * | |
976 | * As this dependency is totally transparent to OS, evaluate | |
977 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
978 | * _TMP, before they are actually used. | |
979 | */ | |
980 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
981 | { | |
982 | acpi_handle handle = tz->device->handle; | |
983 | unsigned long long value; | |
984 | int i; | |
985 | ||
986 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
987 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
988 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
989 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
990 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
991 | acpi_status status; | |
992 | ||
993 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
994 | if (status == AE_NOT_FOUND) | |
995 | break; | |
996 | } | |
997 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
998 | } | |
999 | ||
4be44fcd | 1000 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1001 | { |
4be44fcd | 1002 | int result = 0; |
1da177e4 | 1003 | |
1da177e4 LT |
1004 | |
1005 | if (!tz) | |
d550d98d | 1006 | return -EINVAL; |
1da177e4 | 1007 | |
261cba2d ZR |
1008 | acpi_thermal_aml_dependency_fix(tz); |
1009 | ||
9bcb8118 MG |
1010 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1011 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1012 | if (result) |
d550d98d | 1013 | return result; |
1da177e4 | 1014 | |
9bcb8118 MG |
1015 | /* Get temperature [_TMP] (required) */ |
1016 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1017 | if (result) |
d550d98d | 1018 | return result; |
1da177e4 LT |
1019 | |
1020 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1021 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1022 | if (!result) |
1da177e4 | 1023 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1024 | |
1025 | /* Get default polling frequency [_TZP] (optional) */ | |
1026 | if (tzp) | |
1027 | tz->polling_frequency = tzp; | |
1028 | else | |
1029 | acpi_thermal_get_polling_frequency(tz); | |
1030 | ||
d550d98d | 1031 | return 0; |
1da177e4 LT |
1032 | } |
1033 | ||
13614e37 JD |
1034 | /* |
1035 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1036 | * handles temperature values with a single decimal place. As a consequence, | |
1037 | * some implementations use an offset of 273.1 and others use an offset of | |
1038 | * 273.2. Try to find out which one is being used, to present the most | |
1039 | * accurate and visually appealing number. | |
1040 | * | |
1041 | * The heuristic below should work for all ACPI thermal zones which have a | |
1042 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1043 | */ | |
1044 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1045 | { | |
1046 | if (tz->trips.critical.flags.valid && | |
1047 | (tz->trips.critical.temperature % 5) == 1) | |
7f49a5cb | 1048 | tz->kelvin_offset = 273100; |
13614e37 | 1049 | else |
7f49a5cb | 1050 | tz->kelvin_offset = 273200; |
13614e37 JD |
1051 | } |
1052 | ||
a59ffb20 AL |
1053 | static void acpi_thermal_check_fn(struct work_struct *work) |
1054 | { | |
1055 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
1056 | thermal_check_work); | |
1057 | acpi_thermal_check(tz); | |
1058 | } | |
1059 | ||
4be44fcd | 1060 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1061 | { |
4be44fcd | 1062 | int result = 0; |
4be44fcd | 1063 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1064 | |
1da177e4 LT |
1065 | |
1066 | if (!device) | |
d550d98d | 1067 | return -EINVAL; |
1da177e4 | 1068 | |
36bcbec7 | 1069 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1070 | if (!tz) |
d550d98d | 1071 | return -ENOMEM; |
1da177e4 | 1072 | |
8348e1b1 | 1073 | tz->device = device; |
1da177e4 LT |
1074 | strcpy(tz->name, device->pnp.bus_id); |
1075 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1076 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1077 | device->driver_data = tz; |
3f655ef8 | 1078 | |
1da177e4 LT |
1079 | result = acpi_thermal_get_info(tz); |
1080 | if (result) | |
3f655ef8 ZR |
1081 | goto free_memory; |
1082 | ||
13614e37 JD |
1083 | acpi_thermal_guess_offset(tz); |
1084 | ||
3f655ef8 ZR |
1085 | result = acpi_thermal_register_thermal_zone(tz); |
1086 | if (result) | |
1087 | goto free_memory; | |
1da177e4 | 1088 | |
a59ffb20 AL |
1089 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1090 | ||
766a8a6d | 1091 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
7f49a5cb | 1092 | acpi_device_bid(device), deci_kelvin_to_celsius(tz->temperature)); |
3f655ef8 | 1093 | goto end; |
1da177e4 | 1094 | |
3f655ef8 ZR |
1095 | free_memory: |
1096 | kfree(tz); | |
1097 | end: | |
d550d98d | 1098 | return result; |
1da177e4 LT |
1099 | } |
1100 | ||
51fac838 | 1101 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1102 | { |
4be44fcd | 1103 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1104 | |
1da177e4 | 1105 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1106 | return -EINVAL; |
1da177e4 | 1107 | |
a59ffb20 | 1108 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1109 | tz = acpi_driver_data(device); |
1da177e4 | 1110 | |
3f655ef8 | 1111 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1112 | kfree(tz); |
d550d98d | 1113 | return 0; |
1da177e4 LT |
1114 | } |
1115 | ||
90692404 | 1116 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1117 | static int acpi_thermal_suspend(struct device *dev) |
1118 | { | |
1119 | /* Make sure the previously queued thermal check work has been done */ | |
1120 | flush_workqueue(acpi_thermal_pm_queue); | |
1121 | return 0; | |
1122 | } | |
1123 | ||
167cffb6 | 1124 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1125 | { |
167cffb6 | 1126 | struct acpi_thermal *tz; |
b1028c54 KK |
1127 | int i, j, power_state, result; |
1128 | ||
167cffb6 | 1129 | if (!dev) |
d550d98d | 1130 | return -EINVAL; |
74ce1468 | 1131 | |
167cffb6 RW |
1132 | tz = acpi_driver_data(to_acpi_device(dev)); |
1133 | if (!tz) | |
1134 | return -EINVAL; | |
74ce1468 | 1135 | |
bed936f7 | 1136 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1137 | if (!(&tz->trips.active[i])) |
1138 | break; | |
1139 | if (!tz->trips.active[i].flags.valid) | |
1140 | break; | |
1141 | tz->trips.active[i].flags.enabled = 1; | |
1142 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1143 | result = acpi_bus_update_power( |
1144 | tz->trips.active[i].devices.handles[j], | |
1145 | &power_state); | |
b1028c54 KK |
1146 | if (result || (power_state != ACPI_STATE_D0)) { |
1147 | tz->trips.active[i].flags.enabled = 0; | |
1148 | break; | |
1149 | } | |
bed936f7 | 1150 | } |
b1028c54 | 1151 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1152 | } |
1153 | ||
a59ffb20 | 1154 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); |
74ce1468 KK |
1155 | |
1156 | return AE_OK; | |
1157 | } | |
90692404 | 1158 | #endif |
74ce1468 | 1159 | |
1855256c | 1160 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1161 | |
1162 | if (act == 0) { | |
766a8a6d AS |
1163 | pr_notice(PREFIX "%s detected: " |
1164 | "disabling all active thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1165 | act = -1; |
1166 | } | |
1167 | return 0; | |
1168 | } | |
1855256c | 1169 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1170 | |
766a8a6d AS |
1171 | pr_notice(PREFIX "%s detected: " |
1172 | "disabling all critical thermal trip point actions.\n", d->ident); | |
8c99fdce LB |
1173 | nocrt = 1; |
1174 | return 0; | |
1175 | } | |
1855256c | 1176 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1177 | |
1178 | if (tzp == 0) { | |
766a8a6d AS |
1179 | pr_notice(PREFIX "%s detected: " |
1180 | "enabling thermal zone polling\n", d->ident); | |
0b5bfa1c LB |
1181 | tzp = 300; /* 300 dS = 30 Seconds */ |
1182 | } | |
1183 | return 0; | |
1184 | } | |
1855256c | 1185 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1186 | |
1187 | if (psv == 0) { | |
766a8a6d AS |
1188 | pr_notice(PREFIX "%s detected: " |
1189 | "disabling all passive thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1190 | psv = -1; |
1191 | } | |
1192 | return 0; | |
1193 | } | |
1194 | ||
6faadbbb | 1195 | static const struct dmi_system_id thermal_dmi_table[] __initconst = { |
0b5bfa1c LB |
1196 | /* |
1197 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1198 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1199 | */ | |
1200 | { | |
1201 | .callback = thermal_act, | |
1202 | .ident = "AOpen i915GMm-HFS", | |
1203 | .matches = { | |
1204 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1205 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1206 | }, | |
1207 | }, | |
1208 | { | |
1209 | .callback = thermal_psv, | |
1210 | .ident = "AOpen i915GMm-HFS", | |
1211 | .matches = { | |
1212 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1213 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1214 | }, | |
1215 | }, | |
1216 | { | |
1217 | .callback = thermal_tzp, | |
1218 | .ident = "AOpen i915GMm-HFS", | |
1219 | .matches = { | |
1220 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1221 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1222 | }, | |
1223 | }, | |
8c99fdce LB |
1224 | { |
1225 | .callback = thermal_nocrt, | |
1226 | .ident = "Gigabyte GA-7ZX", | |
1227 | .matches = { | |
1228 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1229 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1230 | }, | |
1231 | }, | |
0b5bfa1c LB |
1232 | {} |
1233 | }; | |
0b5bfa1c | 1234 | |
4be44fcd | 1235 | static int __init acpi_thermal_init(void) |
1da177e4 | 1236 | { |
4be44fcd | 1237 | int result = 0; |
1da177e4 | 1238 | |
0b5bfa1c LB |
1239 | dmi_check_system(thermal_dmi_table); |
1240 | ||
72b33ef8 | 1241 | if (off) { |
766a8a6d | 1242 | pr_notice(PREFIX "thermal control disabled\n"); |
72b33ef8 LB |
1243 | return -ENODEV; |
1244 | } | |
43d9f87b | 1245 | |
e053dc90 BS |
1246 | acpi_thermal_pm_queue = alloc_workqueue("acpi_thermal_pm", |
1247 | WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); | |
a59ffb20 AL |
1248 | if (!acpi_thermal_pm_queue) |
1249 | return -ENODEV; | |
1250 | ||
1da177e4 | 1251 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1252 | if (result < 0) { |
1253 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1254 | return -ENODEV; |
a59ffb20 | 1255 | } |
1da177e4 | 1256 | |
d550d98d | 1257 | return 0; |
1da177e4 LT |
1258 | } |
1259 | ||
4be44fcd | 1260 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1261 | { |
1da177e4 | 1262 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1263 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1264 | |
d550d98d | 1265 | return; |
1da177e4 LT |
1266 | } |
1267 | ||
1da177e4 LT |
1268 | module_init(acpi_thermal_init); |
1269 | module_exit(acpi_thermal_exit); |