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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 | 174 | struct thermal_zone_device *thermal_zone; |
7f49a5cb | 175 | int kelvin_offset; /* in millidegrees */ |
a59ffb20 | 176 | struct work_struct thermal_check_work; |
1da177e4 LT |
177 | }; |
178 | ||
1da177e4 LT |
179 | /* -------------------------------------------------------------------------- |
180 | Thermal Zone Management | |
181 | -------------------------------------------------------------------------- */ | |
182 | ||
4be44fcd | 183 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 184 | { |
4be44fcd | 185 | acpi_status status = AE_OK; |
27663c58 | 186 | unsigned long long tmp; |
1da177e4 LT |
187 | |
188 | if (!tz) | |
d550d98d | 189 | return -EINVAL; |
1da177e4 LT |
190 | |
191 | tz->last_temperature = tz->temperature; | |
192 | ||
27663c58 | 193 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 194 | if (ACPI_FAILURE(status)) |
d550d98d | 195 | return -ENODEV; |
1da177e4 | 196 | |
27663c58 | 197 | tz->temperature = tmp; |
4be44fcd LB |
198 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
199 | tz->temperature)); | |
1da177e4 | 200 | |
d550d98d | 201 | return 0; |
1da177e4 LT |
202 | } |
203 | ||
4be44fcd | 204 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 205 | { |
4be44fcd | 206 | acpi_status status = AE_OK; |
27663c58 | 207 | unsigned long long tmp; |
1da177e4 LT |
208 | |
209 | if (!tz) | |
d550d98d | 210 | return -EINVAL; |
1da177e4 | 211 | |
27663c58 | 212 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 213 | if (ACPI_FAILURE(status)) |
d550d98d | 214 | return -ENODEV; |
1da177e4 | 215 | |
27663c58 | 216 | tz->polling_frequency = tmp; |
4be44fcd LB |
217 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
218 | tz->polling_frequency)); | |
1da177e4 | 219 | |
d550d98d | 220 | return 0; |
1da177e4 LT |
221 | } |
222 | ||
4be44fcd | 223 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 224 | { |
1da177e4 | 225 | if (!tz) |
d550d98d | 226 | return -EINVAL; |
1da177e4 | 227 | |
e88c7409 KS |
228 | if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, |
229 | "_SCP", mode))) | |
d550d98d | 230 | return -ENODEV; |
1da177e4 | 231 | |
d550d98d | 232 | return 0; |
1da177e4 LT |
233 | } |
234 | ||
ce44e197 ZR |
235 | #define ACPI_TRIPS_CRITICAL 0x01 |
236 | #define ACPI_TRIPS_HOT 0x02 | |
237 | #define ACPI_TRIPS_PASSIVE 0x04 | |
238 | #define ACPI_TRIPS_ACTIVE 0x08 | |
239 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 240 | |
ce44e197 ZR |
241 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
242 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 243 | |
ce44e197 ZR |
244 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
245 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
246 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 247 | |
ce44e197 ZR |
248 | /* |
249 | * This exception is thrown out in two cases: | |
250 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
251 | * when re-evaluating the AML code. | |
252 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
253 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
254 | */ | |
255 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
256 | do { \ | |
257 | if (flags != ACPI_TRIPS_INIT) \ | |
258 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
259 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 260 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
261 | } while (0) |
262 | ||
263 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
264 | { | |
265 | acpi_status status = AE_OK; | |
27663c58 | 266 | unsigned long long tmp; |
ce44e197 ZR |
267 | struct acpi_handle_list devices; |
268 | int valid = 0; | |
269 | int i; | |
1da177e4 | 270 | |
fa809452 | 271 | /* Critical Shutdown */ |
ce44e197 ZR |
272 | if (flag & ACPI_TRIPS_CRITICAL) { |
273 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
274 | "_CRT", NULL, &tmp); |
275 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
276 | /* |
277 | * Treat freezing temperatures as invalid as well; some | |
278 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 279 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
280 | * ... so lets discard those as invalid. |
281 | */ | |
fa809452 TR |
282 | if (ACPI_FAILURE(status)) { |
283 | tz->trips.critical.flags.valid = 0; | |
284 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
285 | "No critical threshold\n")); | |
286 | } else if (tmp <= 2732) { | |
766a8a6d AS |
287 | pr_warn(FW_BUG "Invalid critical threshold (%llu)\n", |
288 | tmp); | |
c52a7419 | 289 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
290 | } else { |
291 | tz->trips.critical.flags.valid = 1; | |
292 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
293 | "Found critical threshold [%lu]\n", |
294 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
295 | } |
296 | if (tz->trips.critical.flags.valid == 1) { | |
297 | if (crt == -1) { | |
298 | tz->trips.critical.flags.valid = 0; | |
299 | } else if (crt > 0) { | |
7f49a5cb AM |
300 | unsigned long crt_k = celsius_to_deci_kelvin(crt); |
301 | ||
ce44e197 | 302 | /* |
22a94d79 | 303 | * Allow override critical threshold |
ce44e197 | 304 | */ |
22a94d79 | 305 | if (crt_k > tz->trips.critical.temperature) |
766a8a6d AS |
306 | pr_warn(PREFIX "Critical threshold %d C\n", |
307 | crt); | |
22a94d79 | 308 | tz->trips.critical.temperature = crt_k; |
ce44e197 | 309 | } |
c52a7419 LB |
310 | } |
311 | } | |
312 | ||
1da177e4 | 313 | /* Critical Sleep (optional) */ |
ce44e197 | 314 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 315 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 316 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
317 | if (ACPI_FAILURE(status)) { |
318 | tz->trips.hot.flags.valid = 0; | |
319 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
320 | "No hot threshold\n")); | |
321 | } else { | |
27663c58 | 322 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
323 | tz->trips.hot.flags.valid = 1; |
324 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
325 | "Found hot threshold [%lu]\n", | |
ee17fdf2 | 326 | tz->trips.hot.temperature)); |
ce44e197 | 327 | } |
a70cdc52 LB |
328 | } |
329 | ||
ce44e197 | 330 | /* Passive (optional) */ |
0e4240d9 ZR |
331 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
332 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
333 | valid = tz->trips.passive.flags.valid; |
334 | if (psv == -1) { | |
335 | status = AE_SUPPORT; | |
336 | } else if (psv > 0) { | |
7f49a5cb | 337 | tmp = celsius_to_deci_kelvin(psv); |
ce44e197 ZR |
338 | status = AE_OK; |
339 | } else { | |
340 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 341 | "_PSV", NULL, &tmp); |
ce44e197 | 342 | } |
1da177e4 | 343 | |
1da177e4 LT |
344 | if (ACPI_FAILURE(status)) |
345 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 346 | else { |
27663c58 | 347 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
348 | tz->trips.passive.flags.valid = 1; |
349 | if (flag == ACPI_TRIPS_INIT) { | |
350 | status = acpi_evaluate_integer( | |
351 | tz->device->handle, "_TC1", | |
27663c58 | 352 | NULL, &tmp); |
ce44e197 ZR |
353 | if (ACPI_FAILURE(status)) |
354 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
355 | else |
356 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
357 | status = acpi_evaluate_integer( |
358 | tz->device->handle, "_TC2", | |
27663c58 | 359 | NULL, &tmp); |
ce44e197 ZR |
360 | if (ACPI_FAILURE(status)) |
361 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
362 | else |
363 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
364 | status = acpi_evaluate_integer( |
365 | tz->device->handle, "_TSP", | |
27663c58 | 366 | NULL, &tmp); |
ce44e197 ZR |
367 | if (ACPI_FAILURE(status)) |
368 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
369 | else |
370 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
371 | } |
372 | } | |
373 | } | |
374 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
375 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
376 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
377 | NULL, &devices); | |
0e4240d9 | 378 | if (ACPI_FAILURE(status)) { |
766a8a6d | 379 | pr_warn(PREFIX "Invalid passive threshold\n"); |
1da177e4 | 380 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 381 | } |
1da177e4 | 382 | else |
ce44e197 | 383 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 384 | |
ce44e197 ZR |
385 | if (memcmp(&tz->trips.passive.devices, &devices, |
386 | sizeof(struct acpi_handle_list))) { | |
387 | memcpy(&tz->trips.passive.devices, &devices, | |
388 | sizeof(struct acpi_handle_list)); | |
389 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
390 | } | |
391 | } | |
392 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
393 | if (valid != tz->trips.passive.flags.valid) | |
394 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
395 | } | |
1da177e4 | 396 | |
ce44e197 | 397 | /* Active (optional) */ |
4be44fcd | 398 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 399 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 400 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 401 | |
f8707ec9 | 402 | if (act == -1) |
ce44e197 ZR |
403 | break; /* disable all active trip points */ |
404 | ||
0e4240d9 ZR |
405 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
406 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 407 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 408 | name, NULL, &tmp); |
ce44e197 ZR |
409 | if (ACPI_FAILURE(status)) { |
410 | tz->trips.active[i].flags.valid = 0; | |
411 | if (i == 0) | |
412 | break; | |
413 | if (act <= 0) | |
414 | break; | |
415 | if (i == 1) | |
416 | tz->trips.active[0].temperature = | |
7f49a5cb | 417 | celsius_to_deci_kelvin(act); |
ce44e197 ZR |
418 | else |
419 | /* | |
420 | * Don't allow override higher than | |
421 | * the next higher trip point | |
422 | */ | |
423 | tz->trips.active[i - 1].temperature = | |
424 | (tz->trips.active[i - 2].temperature < | |
7f49a5cb | 425 | celsius_to_deci_kelvin(act) ? |
ce44e197 | 426 | tz->trips.active[i - 2].temperature : |
7f49a5cb | 427 | celsius_to_deci_kelvin(act)); |
f8707ec9 | 428 | break; |
27663c58 MW |
429 | } else { |
430 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 431 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 432 | } |
f8707ec9 | 433 | } |
1da177e4 LT |
434 | |
435 | name[2] = 'L'; | |
ce44e197 ZR |
436 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
437 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
438 | status = acpi_evaluate_reference(tz->device->handle, | |
439 | name, NULL, &devices); | |
0e4240d9 | 440 | if (ACPI_FAILURE(status)) { |
766a8a6d AS |
441 | pr_warn(PREFIX "Invalid active%d threshold\n", |
442 | i); | |
ce44e197 | 443 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 444 | } |
ce44e197 ZR |
445 | else |
446 | tz->trips.active[i].flags.valid = 1; | |
447 | ||
448 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
449 | sizeof(struct acpi_handle_list))) { | |
450 | memcpy(&tz->trips.active[i].devices, &devices, | |
451 | sizeof(struct acpi_handle_list)); | |
452 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
453 | } | |
454 | } | |
455 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
456 | if (valid != tz->trips.active[i].flags.valid) | |
457 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
458 | ||
459 | if (!tz->trips.active[i].flags.valid) | |
460 | break; | |
461 | } | |
462 | ||
e88c7409 | 463 | if (flag & ACPI_TRIPS_DEVICES) { |
668e0200 | 464 | memset(&devices, 0, sizeof(devices)); |
ce44e197 ZR |
465 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
466 | NULL, &devices); | |
668e0200 LT |
467 | if (ACPI_SUCCESS(status) |
468 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
469 | tz->devices = devices; | |
ce44e197 ZR |
470 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
471 | } | |
1da177e4 LT |
472 | } |
473 | ||
d550d98d | 474 | return 0; |
1da177e4 LT |
475 | } |
476 | ||
ce44e197 | 477 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 478 | { |
8b7ef6d8 TR |
479 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
480 | ||
481 | if (ret) | |
482 | return ret; | |
483 | ||
484 | valid = tz->trips.critical.flags.valid | | |
485 | tz->trips.hot.flags.valid | | |
486 | tz->trips.passive.flags.valid; | |
487 | ||
488 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
489 | valid |= tz->trips.active[i].flags.valid; | |
490 | ||
491 | if (!valid) { | |
766a8a6d | 492 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
493 | return -ENODEV; |
494 | } | |
495 | return 0; | |
1da177e4 LT |
496 | } |
497 | ||
4be44fcd | 498 | static void acpi_thermal_check(void *data) |
1da177e4 | 499 | { |
50dd0969 | 500 | struct acpi_thermal *tz = data; |
1da177e4 | 501 | |
0e70f466 SP |
502 | thermal_zone_device_update(tz->thermal_zone, |
503 | THERMAL_EVENT_UNSPECIFIED); | |
1da177e4 LT |
504 | } |
505 | ||
3f655ef8 | 506 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 507 | |
17e8351a | 508 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
509 | { |
510 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 511 | int result; |
3f655ef8 ZR |
512 | |
513 | if (!tz) | |
514 | return -EINVAL; | |
515 | ||
76ecb4f2 ZR |
516 | result = acpi_thermal_get_temperature(tz); |
517 | if (result) | |
518 | return result; | |
519 | ||
7f49a5cb | 520 | *temp = deci_kelvin_to_millicelsius_with_offset(tz->temperature, |
7b83fd9d | 521 | tz->kelvin_offset); |
6503e5df | 522 | return 0; |
3f655ef8 ZR |
523 | } |
524 | ||
3f655ef8 | 525 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, |
6503e5df | 526 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
527 | { |
528 | struct acpi_thermal *tz = thermal->devdata; | |
529 | int i; | |
530 | ||
531 | if (!tz || trip < 0) | |
532 | return -EINVAL; | |
533 | ||
534 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
535 | if (!trip) { |
536 | *type = THERMAL_TRIP_CRITICAL; | |
537 | return 0; | |
538 | } | |
3f655ef8 ZR |
539 | trip--; |
540 | } | |
541 | ||
542 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
543 | if (!trip) { |
544 | *type = THERMAL_TRIP_HOT; | |
545 | return 0; | |
546 | } | |
3f655ef8 ZR |
547 | trip--; |
548 | } | |
549 | ||
550 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
551 | if (!trip) { |
552 | *type = THERMAL_TRIP_PASSIVE; | |
553 | return 0; | |
554 | } | |
3f655ef8 ZR |
555 | trip--; |
556 | } | |
557 | ||
558 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
559 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
560 | if (!trip) { |
561 | *type = THERMAL_TRIP_ACTIVE; | |
562 | return 0; | |
563 | } | |
3f655ef8 ZR |
564 | trip--; |
565 | } | |
566 | ||
567 | return -EINVAL; | |
568 | } | |
569 | ||
570 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 571 | int trip, int *temp) |
3f655ef8 ZR |
572 | { |
573 | struct acpi_thermal *tz = thermal->devdata; | |
574 | int i; | |
575 | ||
576 | if (!tz || trip < 0) | |
577 | return -EINVAL; | |
578 | ||
579 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 580 | if (!trip) { |
7f49a5cb | 581 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
582 | tz->trips.critical.temperature, |
583 | tz->kelvin_offset); | |
6503e5df MG |
584 | return 0; |
585 | } | |
3f655ef8 ZR |
586 | trip--; |
587 | } | |
588 | ||
589 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 590 | if (!trip) { |
7f49a5cb | 591 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
592 | tz->trips.hot.temperature, |
593 | tz->kelvin_offset); | |
6503e5df MG |
594 | return 0; |
595 | } | |
3f655ef8 ZR |
596 | trip--; |
597 | } | |
598 | ||
599 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 600 | if (!trip) { |
7f49a5cb | 601 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
602 | tz->trips.passive.temperature, |
603 | tz->kelvin_offset); | |
6503e5df MG |
604 | return 0; |
605 | } | |
3f655ef8 ZR |
606 | trip--; |
607 | } | |
608 | ||
609 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
610 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 611 | if (!trip) { |
7f49a5cb | 612 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
613 | tz->trips.active[i].temperature, |
614 | tz->kelvin_offset); | |
6503e5df MG |
615 | return 0; |
616 | } | |
3f655ef8 ZR |
617 | trip--; |
618 | } | |
619 | ||
620 | return -EINVAL; | |
621 | } | |
622 | ||
9ec732ff | 623 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
624 | int *temperature) |
625 | { | |
9ec732ff ZR |
626 | struct acpi_thermal *tz = thermal->devdata; |
627 | ||
628 | if (tz->trips.critical.flags.valid) { | |
7f49a5cb | 629 | *temperature = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
630 | tz->trips.critical.temperature, |
631 | tz->kelvin_offset); | |
9ec732ff ZR |
632 | return 0; |
633 | } else | |
634 | return -EINVAL; | |
635 | } | |
636 | ||
601f3d42 ZR |
637 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
638 | int trip, enum thermal_trend *trend) | |
639 | { | |
640 | struct acpi_thermal *tz = thermal->devdata; | |
641 | enum thermal_trip_type type; | |
642 | int i; | |
643 | ||
644 | if (thermal_get_trip_type(thermal, trip, &type)) | |
645 | return -EINVAL; | |
646 | ||
4ae46bef | 647 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a | 648 | int trip_temp; |
7f49a5cb | 649 | int temp = deci_kelvin_to_millicelsius_with_offset( |
7b83fd9d | 650 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
651 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
652 | return -EINVAL; | |
653 | ||
654 | if (temp > trip_temp) { | |
655 | *trend = THERMAL_TREND_RAISING; | |
656 | return 0; | |
657 | } else { | |
658 | /* Fall back on default trend */ | |
659 | return -EINVAL; | |
660 | } | |
4ae46bef | 661 | } |
601f3d42 ZR |
662 | |
663 | /* | |
664 | * tz->temperature has already been updated by generic thermal layer, | |
665 | * before this callback being invoked | |
666 | */ | |
667 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
668 | + (tz->trips.passive.tc2 | |
669 | * (tz->temperature - tz->trips.passive.temperature)); | |
670 | ||
671 | if (i > 0) | |
672 | *trend = THERMAL_TREND_RAISING; | |
673 | else if (i < 0) | |
674 | *trend = THERMAL_TREND_DROPPING; | |
675 | else | |
676 | *trend = THERMAL_TREND_STABLE; | |
677 | return 0; | |
678 | } | |
679 | ||
680 | ||
b1569e99 MG |
681 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
682 | enum thermal_trip_type trip_type) | |
683 | { | |
684 | u8 type = 0; | |
685 | struct acpi_thermal *tz = thermal->devdata; | |
686 | ||
687 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
688 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
689 | else if (trip_type == THERMAL_TRIP_HOT) | |
690 | type = ACPI_THERMAL_NOTIFY_HOT; | |
691 | else | |
692 | return 0; | |
693 | ||
b1569e99 | 694 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 695 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
696 | |
697 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
698 | return 1; | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
3f655ef8 ZR |
703 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
704 | struct thermal_cooling_device *cdev, | |
9d99842f | 705 | bool bind) |
3f655ef8 ZR |
706 | { |
707 | struct acpi_device *device = cdev->devdata; | |
708 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
709 | struct acpi_device *dev; |
710 | acpi_status status; | |
711 | acpi_handle handle; | |
3f655ef8 ZR |
712 | int i; |
713 | int j; | |
714 | int trip = -1; | |
715 | int result = 0; | |
716 | ||
717 | if (tz->trips.critical.flags.valid) | |
718 | trip++; | |
719 | ||
720 | if (tz->trips.hot.flags.valid) | |
721 | trip++; | |
722 | ||
723 | if (tz->trips.passive.flags.valid) { | |
724 | trip++; | |
725 | for (i = 0; i < tz->trips.passive.devices.count; | |
726 | i++) { | |
653a00c9 ZR |
727 | handle = tz->trips.passive.devices.handles[i]; |
728 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
729 | if (ACPI_FAILURE(status) || dev != device) |
730 | continue; | |
731 | if (bind) | |
732 | result = | |
733 | thermal_zone_bind_cooling_device | |
734 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
735 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
736 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
737 | else |
738 | result = | |
739 | thermal_zone_unbind_cooling_device | |
740 | (thermal, trip, cdev); | |
741 | if (result) | |
742 | goto failed; | |
3f655ef8 ZR |
743 | } |
744 | } | |
745 | ||
746 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
747 | if (!tz->trips.active[i].flags.valid) | |
748 | break; | |
749 | trip++; | |
750 | for (j = 0; | |
751 | j < tz->trips.active[i].devices.count; | |
752 | j++) { | |
653a00c9 ZR |
753 | handle = tz->trips.active[i].devices.handles[j]; |
754 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
755 | if (ACPI_FAILURE(status) || dev != device) |
756 | continue; | |
757 | if (bind) | |
758 | result = thermal_zone_bind_cooling_device | |
759 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
760 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
761 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
762 | else |
763 | result = thermal_zone_unbind_cooling_device | |
764 | (thermal, trip, cdev); | |
765 | if (result) | |
766 | goto failed; | |
3f655ef8 ZR |
767 | } |
768 | } | |
769 | ||
770 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
771 | handle = tz->devices.handles[i]; |
772 | status = acpi_bus_get_device(handle, &dev); | |
773 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
774 | if (bind) |
775 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
776 | (thermal, THERMAL_TRIPS_NONE, |
777 | cdev, THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
778 | THERMAL_NO_LIMIT, |
779 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
780 | else |
781 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
782 | (thermal, THERMAL_TRIPS_NONE, |
783 | cdev); | |
653a00c9 ZR |
784 | if (result) |
785 | goto failed; | |
786 | } | |
3f655ef8 ZR |
787 | } |
788 | ||
789 | failed: | |
790 | return result; | |
791 | } | |
792 | ||
793 | static int | |
794 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
795 | struct thermal_cooling_device *cdev) | |
796 | { | |
9d99842f | 797 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
798 | } |
799 | ||
800 | static int | |
801 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
802 | struct thermal_cooling_device *cdev) | |
803 | { | |
9d99842f | 804 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
805 | } |
806 | ||
ec9c9c2e | 807 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
808 | .bind = acpi_thermal_bind_cooling_device, |
809 | .unbind = acpi_thermal_unbind_cooling_device, | |
810 | .get_temp = thermal_get_temp, | |
3f655ef8 ZR |
811 | .get_trip_type = thermal_get_trip_type, |
812 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 813 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 814 | .get_trend = thermal_get_trend, |
b1569e99 | 815 | .notify = thermal_notify, |
3f655ef8 ZR |
816 | }; |
817 | ||
818 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
819 | { | |
820 | int trips = 0; | |
821 | int result; | |
20733939 | 822 | acpi_status status; |
3f655ef8 ZR |
823 | int i; |
824 | ||
825 | if (tz->trips.critical.flags.valid) | |
826 | trips++; | |
827 | ||
828 | if (tz->trips.hot.flags.valid) | |
829 | trips++; | |
830 | ||
831 | if (tz->trips.passive.flags.valid) | |
832 | trips++; | |
833 | ||
834 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
835 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
836 | |
837 | if (tz->trips.passive.flags.valid) | |
838 | tz->thermal_zone = | |
c56f5c03 | 839 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 840 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
841 | tz->trips.passive.tsp*100, |
842 | tz->polling_frequency*100); | |
843 | else | |
844 | tz->thermal_zone = | |
c56f5c03 | 845 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
846 | &acpi_thermal_zone_ops, NULL, |
847 | 0, tz->polling_frequency*100); | |
bb070e43 | 848 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
849 | return -ENODEV; |
850 | ||
851 | result = sysfs_create_link(&tz->device->dev.kobj, | |
852 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
853 | if (result) | |
172066cc | 854 | goto unregister_tzd; |
3f655ef8 ZR |
855 | |
856 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
857 | &tz->device->dev.kobj, "device"); | |
858 | if (result) | |
172066cc | 859 | goto remove_tz_link; |
3f655ef8 | 860 | |
e6f8a4d6 LT |
861 | status = acpi_bus_attach_private_data(tz->device->handle, |
862 | tz->thermal_zone); | |
172066cc AP |
863 | if (ACPI_FAILURE(status)) { |
864 | result = -ENODEV; | |
865 | goto remove_dev_link; | |
866 | } | |
20733939 | 867 | |
7f4957be AP |
868 | result = thermal_zone_device_enable(tz->thermal_zone); |
869 | if (result) | |
870 | goto acpi_bus_detach; | |
3f655ef8 | 871 | |
fc3a8828 GKH |
872 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
873 | tz->thermal_zone->id); | |
172066cc | 874 | |
3f655ef8 | 875 | return 0; |
172066cc | 876 | |
7f4957be AP |
877 | acpi_bus_detach: |
878 | acpi_bus_detach_private_data(tz->device->handle); | |
172066cc AP |
879 | remove_dev_link: |
880 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
881 | remove_tz_link: | |
882 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
883 | unregister_tzd: | |
884 | thermal_zone_device_unregister(tz->thermal_zone); | |
885 | ||
886 | return result; | |
3f655ef8 ZR |
887 | } |
888 | ||
889 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
890 | { | |
891 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
892 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
893 | thermal_zone_device_unregister(tz->thermal_zone); | |
894 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 895 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
896 | } |
897 | ||
898 | ||
1da177e4 LT |
899 | /* -------------------------------------------------------------------------- |
900 | Driver Interface | |
901 | -------------------------------------------------------------------------- */ | |
902 | ||
342d550d | 903 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 904 | { |
342d550d | 905 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 906 | |
1da177e4 LT |
907 | |
908 | if (!tz) | |
d550d98d | 909 | return; |
1da177e4 | 910 | |
1da177e4 LT |
911 | switch (event) { |
912 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
913 | acpi_thermal_check(tz); | |
914 | break; | |
915 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 916 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 917 | acpi_thermal_check(tz); |
962ce8ca | 918 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 919 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
920 | break; |
921 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
922 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
923 | acpi_thermal_check(tz); | |
962ce8ca | 924 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 925 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
926 | break; |
927 | default: | |
928 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 929 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
930 | break; |
931 | } | |
1da177e4 LT |
932 | } |
933 | ||
261cba2d ZR |
934 | /* |
935 | * On some platforms, the AML code has dependency about | |
936 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
937 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
938 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
939 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
940 | * if _TMP has never been evaluated. | |
941 | * | |
942 | * As this dependency is totally transparent to OS, evaluate | |
943 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
944 | * _TMP, before they are actually used. | |
945 | */ | |
946 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
947 | { | |
948 | acpi_handle handle = tz->device->handle; | |
949 | unsigned long long value; | |
950 | int i; | |
951 | ||
952 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
953 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
954 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
955 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
956 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
957 | acpi_status status; | |
958 | ||
959 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
960 | if (status == AE_NOT_FOUND) | |
961 | break; | |
962 | } | |
963 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
964 | } | |
965 | ||
4be44fcd | 966 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 967 | { |
4be44fcd | 968 | int result = 0; |
1da177e4 | 969 | |
1da177e4 LT |
970 | |
971 | if (!tz) | |
d550d98d | 972 | return -EINVAL; |
1da177e4 | 973 | |
261cba2d ZR |
974 | acpi_thermal_aml_dependency_fix(tz); |
975 | ||
9bcb8118 MG |
976 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
977 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 978 | if (result) |
d550d98d | 979 | return result; |
1da177e4 | 980 | |
9bcb8118 MG |
981 | /* Get temperature [_TMP] (required) */ |
982 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 983 | if (result) |
d550d98d | 984 | return result; |
1da177e4 LT |
985 | |
986 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
987 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 988 | if (!result) |
1da177e4 | 989 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
990 | |
991 | /* Get default polling frequency [_TZP] (optional) */ | |
992 | if (tzp) | |
993 | tz->polling_frequency = tzp; | |
994 | else | |
995 | acpi_thermal_get_polling_frequency(tz); | |
996 | ||
d550d98d | 997 | return 0; |
1da177e4 LT |
998 | } |
999 | ||
13614e37 JD |
1000 | /* |
1001 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1002 | * handles temperature values with a single decimal place. As a consequence, | |
1003 | * some implementations use an offset of 273.1 and others use an offset of | |
1004 | * 273.2. Try to find out which one is being used, to present the most | |
1005 | * accurate and visually appealing number. | |
1006 | * | |
1007 | * The heuristic below should work for all ACPI thermal zones which have a | |
1008 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1009 | */ | |
1010 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1011 | { | |
1012 | if (tz->trips.critical.flags.valid && | |
1013 | (tz->trips.critical.temperature % 5) == 1) | |
7f49a5cb | 1014 | tz->kelvin_offset = 273100; |
13614e37 | 1015 | else |
7f49a5cb | 1016 | tz->kelvin_offset = 273200; |
13614e37 JD |
1017 | } |
1018 | ||
a59ffb20 AL |
1019 | static void acpi_thermal_check_fn(struct work_struct *work) |
1020 | { | |
1021 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
1022 | thermal_check_work); | |
1023 | acpi_thermal_check(tz); | |
1024 | } | |
1025 | ||
4be44fcd | 1026 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1027 | { |
4be44fcd | 1028 | int result = 0; |
4be44fcd | 1029 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1030 | |
1da177e4 LT |
1031 | |
1032 | if (!device) | |
d550d98d | 1033 | return -EINVAL; |
1da177e4 | 1034 | |
36bcbec7 | 1035 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1036 | if (!tz) |
d550d98d | 1037 | return -ENOMEM; |
1da177e4 | 1038 | |
8348e1b1 | 1039 | tz->device = device; |
1da177e4 LT |
1040 | strcpy(tz->name, device->pnp.bus_id); |
1041 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1042 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1043 | device->driver_data = tz; |
3f655ef8 | 1044 | |
1da177e4 LT |
1045 | result = acpi_thermal_get_info(tz); |
1046 | if (result) | |
3f655ef8 ZR |
1047 | goto free_memory; |
1048 | ||
13614e37 JD |
1049 | acpi_thermal_guess_offset(tz); |
1050 | ||
3f655ef8 ZR |
1051 | result = acpi_thermal_register_thermal_zone(tz); |
1052 | if (result) | |
1053 | goto free_memory; | |
1da177e4 | 1054 | |
a59ffb20 AL |
1055 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1056 | ||
766a8a6d | 1057 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
7f49a5cb | 1058 | acpi_device_bid(device), deci_kelvin_to_celsius(tz->temperature)); |
3f655ef8 | 1059 | goto end; |
1da177e4 | 1060 | |
3f655ef8 ZR |
1061 | free_memory: |
1062 | kfree(tz); | |
1063 | end: | |
d550d98d | 1064 | return result; |
1da177e4 LT |
1065 | } |
1066 | ||
51fac838 | 1067 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1068 | { |
4be44fcd | 1069 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1070 | |
1da177e4 | 1071 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1072 | return -EINVAL; |
1da177e4 | 1073 | |
a59ffb20 | 1074 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1075 | tz = acpi_driver_data(device); |
1da177e4 | 1076 | |
3f655ef8 | 1077 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1078 | kfree(tz); |
d550d98d | 1079 | return 0; |
1da177e4 LT |
1080 | } |
1081 | ||
90692404 | 1082 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1083 | static int acpi_thermal_suspend(struct device *dev) |
1084 | { | |
1085 | /* Make sure the previously queued thermal check work has been done */ | |
1086 | flush_workqueue(acpi_thermal_pm_queue); | |
1087 | return 0; | |
1088 | } | |
1089 | ||
167cffb6 | 1090 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1091 | { |
167cffb6 | 1092 | struct acpi_thermal *tz; |
b1028c54 KK |
1093 | int i, j, power_state, result; |
1094 | ||
167cffb6 | 1095 | if (!dev) |
d550d98d | 1096 | return -EINVAL; |
74ce1468 | 1097 | |
167cffb6 RW |
1098 | tz = acpi_driver_data(to_acpi_device(dev)); |
1099 | if (!tz) | |
1100 | return -EINVAL; | |
74ce1468 | 1101 | |
bed936f7 | 1102 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1103 | if (!(&tz->trips.active[i])) |
1104 | break; | |
1105 | if (!tz->trips.active[i].flags.valid) | |
1106 | break; | |
1107 | tz->trips.active[i].flags.enabled = 1; | |
1108 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1109 | result = acpi_bus_update_power( |
1110 | tz->trips.active[i].devices.handles[j], | |
1111 | &power_state); | |
b1028c54 KK |
1112 | if (result || (power_state != ACPI_STATE_D0)) { |
1113 | tz->trips.active[i].flags.enabled = 0; | |
1114 | break; | |
1115 | } | |
bed936f7 | 1116 | } |
b1028c54 | 1117 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1118 | } |
1119 | ||
a59ffb20 | 1120 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); |
74ce1468 KK |
1121 | |
1122 | return AE_OK; | |
1123 | } | |
90692404 | 1124 | #endif |
74ce1468 | 1125 | |
1855256c | 1126 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1127 | |
1128 | if (act == 0) { | |
766a8a6d AS |
1129 | pr_notice(PREFIX "%s detected: " |
1130 | "disabling all active thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1131 | act = -1; |
1132 | } | |
1133 | return 0; | |
1134 | } | |
1855256c | 1135 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1136 | |
766a8a6d AS |
1137 | pr_notice(PREFIX "%s detected: " |
1138 | "disabling all critical thermal trip point actions.\n", d->ident); | |
8c99fdce LB |
1139 | nocrt = 1; |
1140 | return 0; | |
1141 | } | |
1855256c | 1142 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1143 | |
1144 | if (tzp == 0) { | |
766a8a6d AS |
1145 | pr_notice(PREFIX "%s detected: " |
1146 | "enabling thermal zone polling\n", d->ident); | |
0b5bfa1c LB |
1147 | tzp = 300; /* 300 dS = 30 Seconds */ |
1148 | } | |
1149 | return 0; | |
1150 | } | |
1855256c | 1151 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1152 | |
1153 | if (psv == 0) { | |
766a8a6d AS |
1154 | pr_notice(PREFIX "%s detected: " |
1155 | "disabling all passive thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1156 | psv = -1; |
1157 | } | |
1158 | return 0; | |
1159 | } | |
1160 | ||
6faadbbb | 1161 | static const struct dmi_system_id thermal_dmi_table[] __initconst = { |
0b5bfa1c LB |
1162 | /* |
1163 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1164 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1165 | */ | |
1166 | { | |
1167 | .callback = thermal_act, | |
1168 | .ident = "AOpen i915GMm-HFS", | |
1169 | .matches = { | |
1170 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1171 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1172 | }, | |
1173 | }, | |
1174 | { | |
1175 | .callback = thermal_psv, | |
1176 | .ident = "AOpen i915GMm-HFS", | |
1177 | .matches = { | |
1178 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1179 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1180 | }, | |
1181 | }, | |
1182 | { | |
1183 | .callback = thermal_tzp, | |
1184 | .ident = "AOpen i915GMm-HFS", | |
1185 | .matches = { | |
1186 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1187 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1188 | }, | |
1189 | }, | |
8c99fdce LB |
1190 | { |
1191 | .callback = thermal_nocrt, | |
1192 | .ident = "Gigabyte GA-7ZX", | |
1193 | .matches = { | |
1194 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1195 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1196 | }, | |
1197 | }, | |
0b5bfa1c LB |
1198 | {} |
1199 | }; | |
0b5bfa1c | 1200 | |
4be44fcd | 1201 | static int __init acpi_thermal_init(void) |
1da177e4 | 1202 | { |
4be44fcd | 1203 | int result = 0; |
1da177e4 | 1204 | |
0b5bfa1c LB |
1205 | dmi_check_system(thermal_dmi_table); |
1206 | ||
72b33ef8 | 1207 | if (off) { |
766a8a6d | 1208 | pr_notice(PREFIX "thermal control disabled\n"); |
72b33ef8 LB |
1209 | return -ENODEV; |
1210 | } | |
43d9f87b | 1211 | |
e053dc90 BS |
1212 | acpi_thermal_pm_queue = alloc_workqueue("acpi_thermal_pm", |
1213 | WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); | |
a59ffb20 AL |
1214 | if (!acpi_thermal_pm_queue) |
1215 | return -ENODEV; | |
1216 | ||
1da177e4 | 1217 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1218 | if (result < 0) { |
1219 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1220 | return -ENODEV; |
a59ffb20 | 1221 | } |
1da177e4 | 1222 | |
d550d98d | 1223 | return 0; |
1da177e4 LT |
1224 | } |
1225 | ||
4be44fcd | 1226 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1227 | { |
1da177e4 | 1228 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1229 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1230 | |
d550d98d | 1231 | return; |
1da177e4 LT |
1232 | } |
1233 | ||
1da177e4 LT |
1234 | module_init(acpi_thermal_init); |
1235 | module_exit(acpi_thermal_exit); |