Commit | Line | Data |
---|---|---|
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> |
1da177e4 | 30 | |
a192a958 LB |
31 | #define PREFIX "ACPI: " |
32 | ||
1da177e4 | 33 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 | 34 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
1da177e4 LT |
35 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 |
36 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
37 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
38 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
39 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
40 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
41 | |
42 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
43 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
44 | ||
1da177e4 | 45 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 46 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 47 | |
1cbf4c56 | 48 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 49 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
50 | MODULE_LICENSE("GPL"); |
51 | ||
f8707ec9 LB |
52 | static int act; |
53 | module_param(act, int, 0644); | |
3c1d36da | 54 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 55 | |
c52a7419 LB |
56 | static int crt; |
57 | module_param(crt, int, 0644); | |
58 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
59 | ||
1da177e4 | 60 | static int tzp; |
730ff34d | 61 | module_param(tzp, int, 0444); |
3c1d36da | 62 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 63 | |
f5487145 LB |
64 | static int nocrt; |
65 | module_param(nocrt, int, 0); | |
8c99fdce | 66 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 67 | |
72b33ef8 LB |
68 | static int off; |
69 | module_param(off, int, 0); | |
3c1d36da | 70 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 71 | |
a70cdc52 LB |
72 | static int psv; |
73 | module_param(psv, int, 0644); | |
3c1d36da | 74 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 75 | |
a59ffb20 AL |
76 | static struct workqueue_struct *acpi_thermal_pm_queue; |
77 | ||
4be44fcd | 78 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 79 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 80 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 81 | |
1ba90e3a TR |
82 | static const struct acpi_device_id thermal_device_ids[] = { |
83 | {ACPI_THERMAL_HID, 0}, | |
84 | {"", 0}, | |
85 | }; | |
86 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
87 | ||
90692404 | 88 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 | 89 | static int acpi_thermal_suspend(struct device *dev); |
167cffb6 | 90 | static int acpi_thermal_resume(struct device *dev); |
fae9e2a4 | 91 | #else |
a59ffb20 | 92 | #define acpi_thermal_suspend NULL |
fae9e2a4 | 93 | #define acpi_thermal_resume NULL |
90692404 | 94 | #endif |
a59ffb20 | 95 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); |
167cffb6 | 96 | |
1da177e4 | 97 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 98 | .name = "thermal", |
4be44fcd | 99 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 100 | .ids = thermal_device_ids, |
4be44fcd LB |
101 | .ops = { |
102 | .add = acpi_thermal_add, | |
103 | .remove = acpi_thermal_remove, | |
342d550d | 104 | .notify = acpi_thermal_notify, |
4be44fcd | 105 | }, |
167cffb6 | 106 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
107 | }; |
108 | ||
109 | struct acpi_thermal_state { | |
4be44fcd LB |
110 | u8 critical:1; |
111 | u8 hot:1; | |
112 | u8 passive:1; | |
113 | u8 active:1; | |
114 | u8 reserved:4; | |
115 | int active_index; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
119 | u8 valid:1; |
120 | u8 enabled:1; | |
121 | u8 reserved:6; | |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct acpi_thermal_critical { | |
125 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 126 | unsigned long temperature; |
1da177e4 LT |
127 | }; |
128 | ||
129 | struct acpi_thermal_hot { | |
130 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 131 | unsigned long temperature; |
1da177e4 LT |
132 | }; |
133 | ||
134 | struct acpi_thermal_passive { | |
135 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
136 | unsigned long temperature; |
137 | unsigned long tc1; | |
138 | unsigned long tc2; | |
139 | unsigned long tsp; | |
140 | struct acpi_handle_list devices; | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_thermal_active { | |
144 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
145 | unsigned long temperature; |
146 | struct acpi_handle_list devices; | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_thermal_trips { | |
150 | struct acpi_thermal_critical critical; | |
4be44fcd | 151 | struct acpi_thermal_hot hot; |
1da177e4 LT |
152 | struct acpi_thermal_passive passive; |
153 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
154 | }; | |
155 | ||
156 | struct acpi_thermal_flags { | |
4be44fcd LB |
157 | u8 cooling_mode:1; /* _SCP */ |
158 | u8 devices:1; /* _TZD */ | |
159 | u8 reserved:6; | |
1da177e4 LT |
160 | }; |
161 | ||
162 | struct acpi_thermal { | |
8348e1b1 | 163 | struct acpi_device * device; |
4be44fcd LB |
164 | acpi_bus_id name; |
165 | unsigned long temperature; | |
166 | unsigned long last_temperature; | |
167 | unsigned long polling_frequency; | |
4be44fcd | 168 | volatile u8 zombie; |
1da177e4 LT |
169 | struct acpi_thermal_flags flags; |
170 | struct acpi_thermal_state state; | |
171 | struct acpi_thermal_trips trips; | |
4be44fcd | 172 | struct acpi_handle_list devices; |
3f655ef8 ZR |
173 | struct thermal_zone_device *thermal_zone; |
174 | int tz_enabled; | |
13614e37 | 175 | int kelvin_offset; |
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) { | |
e866a2e3 | 300 | unsigned long crt_k = CELSIUS_TO_DECI_KELVIN(crt); |
ce44e197 | 301 | /* |
22a94d79 | 302 | * Allow override critical threshold |
ce44e197 | 303 | */ |
22a94d79 | 304 | if (crt_k > tz->trips.critical.temperature) |
766a8a6d AS |
305 | pr_warn(PREFIX "Critical threshold %d C\n", |
306 | crt); | |
22a94d79 | 307 | tz->trips.critical.temperature = crt_k; |
ce44e197 | 308 | } |
c52a7419 LB |
309 | } |
310 | } | |
311 | ||
1da177e4 | 312 | /* Critical Sleep (optional) */ |
ce44e197 | 313 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 314 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 315 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
316 | if (ACPI_FAILURE(status)) { |
317 | tz->trips.hot.flags.valid = 0; | |
318 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
319 | "No hot threshold\n")); | |
320 | } else { | |
27663c58 | 321 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
322 | tz->trips.hot.flags.valid = 1; |
323 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
324 | "Found hot threshold [%lu]\n", | |
ee17fdf2 | 325 | tz->trips.hot.temperature)); |
ce44e197 | 326 | } |
a70cdc52 LB |
327 | } |
328 | ||
ce44e197 | 329 | /* Passive (optional) */ |
0e4240d9 ZR |
330 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
331 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
332 | valid = tz->trips.passive.flags.valid; |
333 | if (psv == -1) { | |
334 | status = AE_SUPPORT; | |
335 | } else if (psv > 0) { | |
e866a2e3 | 336 | tmp = CELSIUS_TO_DECI_KELVIN(psv); |
ce44e197 ZR |
337 | status = AE_OK; |
338 | } else { | |
339 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 340 | "_PSV", NULL, &tmp); |
ce44e197 | 341 | } |
1da177e4 | 342 | |
1da177e4 LT |
343 | if (ACPI_FAILURE(status)) |
344 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 345 | else { |
27663c58 | 346 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
347 | tz->trips.passive.flags.valid = 1; |
348 | if (flag == ACPI_TRIPS_INIT) { | |
349 | status = acpi_evaluate_integer( | |
350 | tz->device->handle, "_TC1", | |
27663c58 | 351 | NULL, &tmp); |
ce44e197 ZR |
352 | if (ACPI_FAILURE(status)) |
353 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
354 | else |
355 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
356 | status = acpi_evaluate_integer( |
357 | tz->device->handle, "_TC2", | |
27663c58 | 358 | NULL, &tmp); |
ce44e197 ZR |
359 | if (ACPI_FAILURE(status)) |
360 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
361 | else |
362 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
363 | status = acpi_evaluate_integer( |
364 | tz->device->handle, "_TSP", | |
27663c58 | 365 | NULL, &tmp); |
ce44e197 ZR |
366 | if (ACPI_FAILURE(status)) |
367 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
368 | else |
369 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
370 | } |
371 | } | |
372 | } | |
373 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
374 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
375 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
376 | NULL, &devices); | |
0e4240d9 | 377 | if (ACPI_FAILURE(status)) { |
766a8a6d | 378 | pr_warn(PREFIX "Invalid passive threshold\n"); |
1da177e4 | 379 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 380 | } |
1da177e4 | 381 | else |
ce44e197 | 382 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 383 | |
ce44e197 ZR |
384 | if (memcmp(&tz->trips.passive.devices, &devices, |
385 | sizeof(struct acpi_handle_list))) { | |
386 | memcpy(&tz->trips.passive.devices, &devices, | |
387 | sizeof(struct acpi_handle_list)); | |
388 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
389 | } | |
390 | } | |
391 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
392 | if (valid != tz->trips.passive.flags.valid) | |
393 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
394 | } | |
1da177e4 | 395 | |
ce44e197 | 396 | /* Active (optional) */ |
4be44fcd | 397 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 398 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 399 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 400 | |
f8707ec9 | 401 | if (act == -1) |
ce44e197 ZR |
402 | break; /* disable all active trip points */ |
403 | ||
0e4240d9 ZR |
404 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
405 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 406 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 407 | name, NULL, &tmp); |
ce44e197 ZR |
408 | if (ACPI_FAILURE(status)) { |
409 | tz->trips.active[i].flags.valid = 0; | |
410 | if (i == 0) | |
411 | break; | |
412 | if (act <= 0) | |
413 | break; | |
414 | if (i == 1) | |
415 | tz->trips.active[0].temperature = | |
e866a2e3 | 416 | CELSIUS_TO_DECI_KELVIN(act); |
ce44e197 ZR |
417 | else |
418 | /* | |
419 | * Don't allow override higher than | |
420 | * the next higher trip point | |
421 | */ | |
422 | tz->trips.active[i - 1].temperature = | |
423 | (tz->trips.active[i - 2].temperature < | |
e866a2e3 | 424 | CELSIUS_TO_DECI_KELVIN(act) ? |
ce44e197 | 425 | tz->trips.active[i - 2].temperature : |
e866a2e3 | 426 | CELSIUS_TO_DECI_KELVIN(act)); |
f8707ec9 | 427 | break; |
27663c58 MW |
428 | } else { |
429 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 430 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 431 | } |
f8707ec9 | 432 | } |
1da177e4 LT |
433 | |
434 | name[2] = 'L'; | |
ce44e197 ZR |
435 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
436 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
437 | status = acpi_evaluate_reference(tz->device->handle, | |
438 | name, NULL, &devices); | |
0e4240d9 | 439 | if (ACPI_FAILURE(status)) { |
766a8a6d AS |
440 | pr_warn(PREFIX "Invalid active%d threshold\n", |
441 | i); | |
ce44e197 | 442 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 443 | } |
ce44e197 ZR |
444 | else |
445 | tz->trips.active[i].flags.valid = 1; | |
446 | ||
447 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
448 | sizeof(struct acpi_handle_list))) { | |
449 | memcpy(&tz->trips.active[i].devices, &devices, | |
450 | sizeof(struct acpi_handle_list)); | |
451 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
452 | } | |
453 | } | |
454 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
455 | if (valid != tz->trips.active[i].flags.valid) | |
456 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
457 | ||
458 | if (!tz->trips.active[i].flags.valid) | |
459 | break; | |
460 | } | |
461 | ||
e88c7409 | 462 | if (flag & ACPI_TRIPS_DEVICES) { |
668e0200 | 463 | memset(&devices, 0, sizeof(devices)); |
ce44e197 ZR |
464 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
465 | NULL, &devices); | |
668e0200 LT |
466 | if (ACPI_SUCCESS(status) |
467 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
468 | tz->devices = devices; | |
ce44e197 ZR |
469 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
470 | } | |
1da177e4 LT |
471 | } |
472 | ||
d550d98d | 473 | return 0; |
1da177e4 LT |
474 | } |
475 | ||
ce44e197 | 476 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 477 | { |
8b7ef6d8 TR |
478 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
479 | ||
480 | if (ret) | |
481 | return ret; | |
482 | ||
483 | valid = tz->trips.critical.flags.valid | | |
484 | tz->trips.hot.flags.valid | | |
485 | tz->trips.passive.flags.valid; | |
486 | ||
487 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
488 | valid |= tz->trips.active[i].flags.valid; | |
489 | ||
490 | if (!valid) { | |
766a8a6d | 491 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
492 | return -ENODEV; |
493 | } | |
494 | return 0; | |
1da177e4 LT |
495 | } |
496 | ||
4be44fcd | 497 | static void acpi_thermal_check(void *data) |
1da177e4 | 498 | { |
50dd0969 | 499 | struct acpi_thermal *tz = data; |
1da177e4 | 500 | |
e994d713 | 501 | if (!tz->tz_enabled) |
ca4e7130 | 502 | return; |
e994d713 | 503 | |
0e70f466 SP |
504 | thermal_zone_device_update(tz->thermal_zone, |
505 | THERMAL_EVENT_UNSPECIFIED); | |
1da177e4 LT |
506 | } |
507 | ||
3f655ef8 | 508 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 509 | |
17e8351a | 510 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
511 | { |
512 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 513 | int result; |
3f655ef8 ZR |
514 | |
515 | if (!tz) | |
516 | return -EINVAL; | |
517 | ||
76ecb4f2 ZR |
518 | result = acpi_thermal_get_temperature(tz); |
519 | if (result) | |
520 | return result; | |
521 | ||
7b83fd9d AL |
522 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(tz->temperature, |
523 | tz->kelvin_offset); | |
6503e5df | 524 | return 0; |
3f655ef8 ZR |
525 | } |
526 | ||
3f655ef8 | 527 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 528 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
529 | { |
530 | struct acpi_thermal *tz = thermal->devdata; | |
531 | ||
532 | if (!tz) | |
533 | return -EINVAL; | |
534 | ||
6503e5df MG |
535 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
536 | THERMAL_DEVICE_DISABLED; | |
537 | ||
538 | return 0; | |
3f655ef8 ZR |
539 | } |
540 | ||
541 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 542 | enum thermal_device_mode mode) |
3f655ef8 ZR |
543 | { |
544 | struct acpi_thermal *tz = thermal->devdata; | |
545 | int enable; | |
546 | ||
547 | if (!tz) | |
548 | return -EINVAL; | |
549 | ||
550 | /* | |
551 | * enable/disable thermal management from ACPI thermal driver | |
552 | */ | |
6503e5df | 553 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 554 | enable = 1; |
e994d713 | 555 | else if (mode == THERMAL_DEVICE_DISABLED) { |
3f655ef8 | 556 | enable = 0; |
e994d713 SP |
557 | pr_warn("thermal zone will be disabled\n"); |
558 | } else | |
3f655ef8 ZR |
559 | return -EINVAL; |
560 | ||
561 | if (enable != tz->tz_enabled) { | |
562 | tz->tz_enabled = enable; | |
563 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
564 | "%s kernel ACPI thermal control\n", |
565 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
566 | acpi_thermal_check(tz); |
567 | } | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 572 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
573 | { |
574 | struct acpi_thermal *tz = thermal->devdata; | |
575 | int i; | |
576 | ||
577 | if (!tz || trip < 0) | |
578 | return -EINVAL; | |
579 | ||
580 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
581 | if (!trip) { |
582 | *type = THERMAL_TRIP_CRITICAL; | |
583 | return 0; | |
584 | } | |
3f655ef8 ZR |
585 | trip--; |
586 | } | |
587 | ||
588 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
589 | if (!trip) { |
590 | *type = THERMAL_TRIP_HOT; | |
591 | return 0; | |
592 | } | |
3f655ef8 ZR |
593 | trip--; |
594 | } | |
595 | ||
596 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
597 | if (!trip) { |
598 | *type = THERMAL_TRIP_PASSIVE; | |
599 | return 0; | |
600 | } | |
3f655ef8 ZR |
601 | trip--; |
602 | } | |
603 | ||
604 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
605 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
606 | if (!trip) { |
607 | *type = THERMAL_TRIP_ACTIVE; | |
608 | return 0; | |
609 | } | |
3f655ef8 ZR |
610 | trip--; |
611 | } | |
612 | ||
613 | return -EINVAL; | |
614 | } | |
615 | ||
616 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 617 | int trip, int *temp) |
3f655ef8 ZR |
618 | { |
619 | struct acpi_thermal *tz = thermal->devdata; | |
620 | int i; | |
621 | ||
622 | if (!tz || trip < 0) | |
623 | return -EINVAL; | |
624 | ||
625 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 626 | if (!trip) { |
7b83fd9d | 627 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
628 | tz->trips.critical.temperature, |
629 | tz->kelvin_offset); | |
6503e5df MG |
630 | return 0; |
631 | } | |
3f655ef8 ZR |
632 | trip--; |
633 | } | |
634 | ||
635 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 636 | if (!trip) { |
7b83fd9d | 637 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
638 | tz->trips.hot.temperature, |
639 | tz->kelvin_offset); | |
6503e5df MG |
640 | return 0; |
641 | } | |
3f655ef8 ZR |
642 | trip--; |
643 | } | |
644 | ||
645 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 646 | if (!trip) { |
7b83fd9d | 647 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
648 | tz->trips.passive.temperature, |
649 | tz->kelvin_offset); | |
6503e5df MG |
650 | return 0; |
651 | } | |
3f655ef8 ZR |
652 | trip--; |
653 | } | |
654 | ||
655 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
656 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 657 | if (!trip) { |
7b83fd9d | 658 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
659 | tz->trips.active[i].temperature, |
660 | tz->kelvin_offset); | |
6503e5df MG |
661 | return 0; |
662 | } | |
3f655ef8 ZR |
663 | trip--; |
664 | } | |
665 | ||
666 | return -EINVAL; | |
667 | } | |
668 | ||
9ec732ff | 669 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
670 | int *temperature) |
671 | { | |
9ec732ff ZR |
672 | struct acpi_thermal *tz = thermal->devdata; |
673 | ||
674 | if (tz->trips.critical.flags.valid) { | |
7b83fd9d | 675 | *temperature = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
676 | tz->trips.critical.temperature, |
677 | tz->kelvin_offset); | |
9ec732ff ZR |
678 | return 0; |
679 | } else | |
680 | return -EINVAL; | |
681 | } | |
682 | ||
601f3d42 ZR |
683 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
684 | int trip, enum thermal_trend *trend) | |
685 | { | |
686 | struct acpi_thermal *tz = thermal->devdata; | |
687 | enum thermal_trip_type type; | |
688 | int i; | |
689 | ||
690 | if (thermal_get_trip_type(thermal, trip, &type)) | |
691 | return -EINVAL; | |
692 | ||
4ae46bef | 693 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a SH |
694 | int trip_temp; |
695 | int temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( | |
7b83fd9d | 696 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
697 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
698 | return -EINVAL; | |
699 | ||
700 | if (temp > trip_temp) { | |
701 | *trend = THERMAL_TREND_RAISING; | |
702 | return 0; | |
703 | } else { | |
704 | /* Fall back on default trend */ | |
705 | return -EINVAL; | |
706 | } | |
4ae46bef | 707 | } |
601f3d42 ZR |
708 | |
709 | /* | |
710 | * tz->temperature has already been updated by generic thermal layer, | |
711 | * before this callback being invoked | |
712 | */ | |
713 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
714 | + (tz->trips.passive.tc2 | |
715 | * (tz->temperature - tz->trips.passive.temperature)); | |
716 | ||
717 | if (i > 0) | |
718 | *trend = THERMAL_TREND_RAISING; | |
719 | else if (i < 0) | |
720 | *trend = THERMAL_TREND_DROPPING; | |
721 | else | |
722 | *trend = THERMAL_TREND_STABLE; | |
723 | return 0; | |
724 | } | |
725 | ||
726 | ||
b1569e99 MG |
727 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
728 | enum thermal_trip_type trip_type) | |
729 | { | |
730 | u8 type = 0; | |
731 | struct acpi_thermal *tz = thermal->devdata; | |
732 | ||
733 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
734 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
735 | else if (trip_type == THERMAL_TRIP_HOT) | |
736 | type = ACPI_THERMAL_NOTIFY_HOT; | |
737 | else | |
738 | return 0; | |
739 | ||
b1569e99 | 740 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 741 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
742 | |
743 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
744 | return 1; | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
3f655ef8 ZR |
749 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
750 | struct thermal_cooling_device *cdev, | |
9d99842f | 751 | bool bind) |
3f655ef8 ZR |
752 | { |
753 | struct acpi_device *device = cdev->devdata; | |
754 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
755 | struct acpi_device *dev; |
756 | acpi_status status; | |
757 | acpi_handle handle; | |
3f655ef8 ZR |
758 | int i; |
759 | int j; | |
760 | int trip = -1; | |
761 | int result = 0; | |
762 | ||
763 | if (tz->trips.critical.flags.valid) | |
764 | trip++; | |
765 | ||
766 | if (tz->trips.hot.flags.valid) | |
767 | trip++; | |
768 | ||
769 | if (tz->trips.passive.flags.valid) { | |
770 | trip++; | |
771 | for (i = 0; i < tz->trips.passive.devices.count; | |
772 | i++) { | |
653a00c9 ZR |
773 | handle = tz->trips.passive.devices.handles[i]; |
774 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
775 | if (ACPI_FAILURE(status) || dev != device) |
776 | continue; | |
777 | if (bind) | |
778 | result = | |
779 | thermal_zone_bind_cooling_device | |
780 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
781 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
782 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
783 | else |
784 | result = | |
785 | thermal_zone_unbind_cooling_device | |
786 | (thermal, trip, cdev); | |
787 | if (result) | |
788 | goto failed; | |
3f655ef8 ZR |
789 | } |
790 | } | |
791 | ||
792 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
793 | if (!tz->trips.active[i].flags.valid) | |
794 | break; | |
795 | trip++; | |
796 | for (j = 0; | |
797 | j < tz->trips.active[i].devices.count; | |
798 | j++) { | |
653a00c9 ZR |
799 | handle = tz->trips.active[i].devices.handles[j]; |
800 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
801 | if (ACPI_FAILURE(status) || dev != device) |
802 | continue; | |
803 | if (bind) | |
804 | result = thermal_zone_bind_cooling_device | |
805 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
806 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
807 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
808 | else |
809 | result = thermal_zone_unbind_cooling_device | |
810 | (thermal, trip, cdev); | |
811 | if (result) | |
812 | goto failed; | |
3f655ef8 ZR |
813 | } |
814 | } | |
815 | ||
816 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
817 | handle = tz->devices.handles[i]; |
818 | status = acpi_bus_get_device(handle, &dev); | |
819 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
820 | if (bind) |
821 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
822 | (thermal, THERMAL_TRIPS_NONE, |
823 | cdev, THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
824 | THERMAL_NO_LIMIT, |
825 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
826 | else |
827 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
828 | (thermal, THERMAL_TRIPS_NONE, |
829 | cdev); | |
653a00c9 ZR |
830 | if (result) |
831 | goto failed; | |
832 | } | |
3f655ef8 ZR |
833 | } |
834 | ||
835 | failed: | |
836 | return result; | |
837 | } | |
838 | ||
839 | static int | |
840 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
841 | struct thermal_cooling_device *cdev) | |
842 | { | |
9d99842f | 843 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
844 | } |
845 | ||
846 | static int | |
847 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
848 | struct thermal_cooling_device *cdev) | |
849 | { | |
9d99842f | 850 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
851 | } |
852 | ||
ec9c9c2e | 853 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
854 | .bind = acpi_thermal_bind_cooling_device, |
855 | .unbind = acpi_thermal_unbind_cooling_device, | |
856 | .get_temp = thermal_get_temp, | |
857 | .get_mode = thermal_get_mode, | |
858 | .set_mode = thermal_set_mode, | |
859 | .get_trip_type = thermal_get_trip_type, | |
860 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 861 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 862 | .get_trend = thermal_get_trend, |
b1569e99 | 863 | .notify = thermal_notify, |
3f655ef8 ZR |
864 | }; |
865 | ||
866 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
867 | { | |
868 | int trips = 0; | |
869 | int result; | |
20733939 | 870 | acpi_status status; |
3f655ef8 ZR |
871 | int i; |
872 | ||
873 | if (tz->trips.critical.flags.valid) | |
874 | trips++; | |
875 | ||
876 | if (tz->trips.hot.flags.valid) | |
877 | trips++; | |
878 | ||
879 | if (tz->trips.passive.flags.valid) | |
880 | trips++; | |
881 | ||
882 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
883 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
884 | |
885 | if (tz->trips.passive.flags.valid) | |
886 | tz->thermal_zone = | |
c56f5c03 | 887 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 888 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
889 | tz->trips.passive.tsp*100, |
890 | tz->polling_frequency*100); | |
891 | else | |
892 | tz->thermal_zone = | |
c56f5c03 | 893 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
894 | &acpi_thermal_zone_ops, NULL, |
895 | 0, tz->polling_frequency*100); | |
bb070e43 | 896 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
897 | return -ENODEV; |
898 | ||
899 | result = sysfs_create_link(&tz->device->dev.kobj, | |
900 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
901 | if (result) | |
902 | return result; | |
903 | ||
904 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
905 | &tz->device->dev.kobj, "device"); | |
906 | if (result) | |
907 | return result; | |
908 | ||
e6f8a4d6 LT |
909 | status = acpi_bus_attach_private_data(tz->device->handle, |
910 | tz->thermal_zone); | |
911 | if (ACPI_FAILURE(status)) | |
20733939 | 912 | return -ENODEV; |
20733939 | 913 | |
3f655ef8 ZR |
914 | tz->tz_enabled = 1; |
915 | ||
fc3a8828 GKH |
916 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
917 | tz->thermal_zone->id); | |
3f655ef8 ZR |
918 | return 0; |
919 | } | |
920 | ||
921 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
922 | { | |
923 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
924 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
925 | thermal_zone_device_unregister(tz->thermal_zone); | |
926 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 927 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
928 | } |
929 | ||
930 | ||
1da177e4 LT |
931 | /* -------------------------------------------------------------------------- |
932 | Driver Interface | |
933 | -------------------------------------------------------------------------- */ | |
934 | ||
342d550d | 935 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 936 | { |
342d550d | 937 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 938 | |
1da177e4 LT |
939 | |
940 | if (!tz) | |
d550d98d | 941 | return; |
1da177e4 | 942 | |
1da177e4 LT |
943 | switch (event) { |
944 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
945 | acpi_thermal_check(tz); | |
946 | break; | |
947 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 948 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 949 | acpi_thermal_check(tz); |
962ce8ca | 950 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 951 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
952 | break; |
953 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
954 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
955 | acpi_thermal_check(tz); | |
962ce8ca | 956 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 957 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
958 | break; |
959 | default: | |
960 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 961 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
962 | break; |
963 | } | |
1da177e4 LT |
964 | } |
965 | ||
261cba2d ZR |
966 | /* |
967 | * On some platforms, the AML code has dependency about | |
968 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
969 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
970 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
971 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
972 | * if _TMP has never been evaluated. | |
973 | * | |
974 | * As this dependency is totally transparent to OS, evaluate | |
975 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
976 | * _TMP, before they are actually used. | |
977 | */ | |
978 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
979 | { | |
980 | acpi_handle handle = tz->device->handle; | |
981 | unsigned long long value; | |
982 | int i; | |
983 | ||
984 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
985 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
986 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
987 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
988 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
989 | acpi_status status; | |
990 | ||
991 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
992 | if (status == AE_NOT_FOUND) | |
993 | break; | |
994 | } | |
995 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
996 | } | |
997 | ||
4be44fcd | 998 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 999 | { |
4be44fcd | 1000 | int result = 0; |
1da177e4 | 1001 | |
1da177e4 LT |
1002 | |
1003 | if (!tz) | |
d550d98d | 1004 | return -EINVAL; |
1da177e4 | 1005 | |
261cba2d ZR |
1006 | acpi_thermal_aml_dependency_fix(tz); |
1007 | ||
9bcb8118 MG |
1008 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1009 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1010 | if (result) |
d550d98d | 1011 | return result; |
1da177e4 | 1012 | |
9bcb8118 MG |
1013 | /* Get temperature [_TMP] (required) */ |
1014 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1015 | if (result) |
d550d98d | 1016 | return result; |
1da177e4 LT |
1017 | |
1018 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1019 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1020 | if (!result) |
1da177e4 | 1021 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1022 | |
1023 | /* Get default polling frequency [_TZP] (optional) */ | |
1024 | if (tzp) | |
1025 | tz->polling_frequency = tzp; | |
1026 | else | |
1027 | acpi_thermal_get_polling_frequency(tz); | |
1028 | ||
d550d98d | 1029 | return 0; |
1da177e4 LT |
1030 | } |
1031 | ||
13614e37 JD |
1032 | /* |
1033 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1034 | * handles temperature values with a single decimal place. As a consequence, | |
1035 | * some implementations use an offset of 273.1 and others use an offset of | |
1036 | * 273.2. Try to find out which one is being used, to present the most | |
1037 | * accurate and visually appealing number. | |
1038 | * | |
1039 | * The heuristic below should work for all ACPI thermal zones which have a | |
1040 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1041 | */ | |
1042 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1043 | { | |
1044 | if (tz->trips.critical.flags.valid && | |
1045 | (tz->trips.critical.temperature % 5) == 1) | |
1046 | tz->kelvin_offset = 2731; | |
1047 | else | |
1048 | tz->kelvin_offset = 2732; | |
1049 | } | |
1050 | ||
a59ffb20 AL |
1051 | static void acpi_thermal_check_fn(struct work_struct *work) |
1052 | { | |
1053 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
1054 | thermal_check_work); | |
1055 | acpi_thermal_check(tz); | |
1056 | } | |
1057 | ||
4be44fcd | 1058 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1059 | { |
4be44fcd | 1060 | int result = 0; |
4be44fcd | 1061 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1062 | |
1da177e4 LT |
1063 | |
1064 | if (!device) | |
d550d98d | 1065 | return -EINVAL; |
1da177e4 | 1066 | |
36bcbec7 | 1067 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1068 | if (!tz) |
d550d98d | 1069 | return -ENOMEM; |
1da177e4 | 1070 | |
8348e1b1 | 1071 | tz->device = device; |
1da177e4 LT |
1072 | strcpy(tz->name, device->pnp.bus_id); |
1073 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1074 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1075 | device->driver_data = tz; |
3f655ef8 | 1076 | |
1da177e4 LT |
1077 | result = acpi_thermal_get_info(tz); |
1078 | if (result) | |
3f655ef8 ZR |
1079 | goto free_memory; |
1080 | ||
13614e37 JD |
1081 | acpi_thermal_guess_offset(tz); |
1082 | ||
3f655ef8 ZR |
1083 | result = acpi_thermal_register_thermal_zone(tz); |
1084 | if (result) | |
1085 | goto free_memory; | |
1da177e4 | 1086 | |
a59ffb20 AL |
1087 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1088 | ||
766a8a6d | 1089 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
e866a2e3 | 1090 | acpi_device_bid(device), DECI_KELVIN_TO_CELSIUS(tz->temperature)); |
3f655ef8 | 1091 | goto end; |
1da177e4 | 1092 | |
3f655ef8 ZR |
1093 | free_memory: |
1094 | kfree(tz); | |
1095 | end: | |
d550d98d | 1096 | return result; |
1da177e4 LT |
1097 | } |
1098 | ||
51fac838 | 1099 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1100 | { |
4be44fcd | 1101 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1102 | |
1da177e4 | 1103 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1104 | return -EINVAL; |
1da177e4 | 1105 | |
a59ffb20 | 1106 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1107 | tz = acpi_driver_data(device); |
1da177e4 | 1108 | |
3f655ef8 | 1109 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1110 | kfree(tz); |
d550d98d | 1111 | return 0; |
1da177e4 LT |
1112 | } |
1113 | ||
90692404 | 1114 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1115 | static int acpi_thermal_suspend(struct device *dev) |
1116 | { | |
1117 | /* Make sure the previously queued thermal check work has been done */ | |
1118 | flush_workqueue(acpi_thermal_pm_queue); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
167cffb6 | 1122 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1123 | { |
167cffb6 | 1124 | struct acpi_thermal *tz; |
b1028c54 KK |
1125 | int i, j, power_state, result; |
1126 | ||
167cffb6 | 1127 | if (!dev) |
d550d98d | 1128 | return -EINVAL; |
74ce1468 | 1129 | |
167cffb6 RW |
1130 | tz = acpi_driver_data(to_acpi_device(dev)); |
1131 | if (!tz) | |
1132 | return -EINVAL; | |
74ce1468 | 1133 | |
bed936f7 | 1134 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1135 | if (!(&tz->trips.active[i])) |
1136 | break; | |
1137 | if (!tz->trips.active[i].flags.valid) | |
1138 | break; | |
1139 | tz->trips.active[i].flags.enabled = 1; | |
1140 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1141 | result = acpi_bus_update_power( |
1142 | tz->trips.active[i].devices.handles[j], | |
1143 | &power_state); | |
b1028c54 KK |
1144 | if (result || (power_state != ACPI_STATE_D0)) { |
1145 | tz->trips.active[i].flags.enabled = 0; | |
1146 | break; | |
1147 | } | |
bed936f7 | 1148 | } |
b1028c54 | 1149 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1150 | } |
1151 | ||
a59ffb20 | 1152 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); |
74ce1468 KK |
1153 | |
1154 | return AE_OK; | |
1155 | } | |
90692404 | 1156 | #endif |
74ce1468 | 1157 | |
1855256c | 1158 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1159 | |
1160 | if (act == 0) { | |
766a8a6d AS |
1161 | pr_notice(PREFIX "%s detected: " |
1162 | "disabling all active thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1163 | act = -1; |
1164 | } | |
1165 | return 0; | |
1166 | } | |
1855256c | 1167 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1168 | |
766a8a6d AS |
1169 | pr_notice(PREFIX "%s detected: " |
1170 | "disabling all critical thermal trip point actions.\n", d->ident); | |
8c99fdce LB |
1171 | nocrt = 1; |
1172 | return 0; | |
1173 | } | |
1855256c | 1174 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1175 | |
1176 | if (tzp == 0) { | |
766a8a6d AS |
1177 | pr_notice(PREFIX "%s detected: " |
1178 | "enabling thermal zone polling\n", d->ident); | |
0b5bfa1c LB |
1179 | tzp = 300; /* 300 dS = 30 Seconds */ |
1180 | } | |
1181 | return 0; | |
1182 | } | |
1855256c | 1183 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1184 | |
1185 | if (psv == 0) { | |
766a8a6d AS |
1186 | pr_notice(PREFIX "%s detected: " |
1187 | "disabling all passive thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1188 | psv = -1; |
1189 | } | |
1190 | return 0; | |
1191 | } | |
1192 | ||
6faadbbb | 1193 | static const struct dmi_system_id thermal_dmi_table[] __initconst = { |
0b5bfa1c LB |
1194 | /* |
1195 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1196 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1197 | */ | |
1198 | { | |
1199 | .callback = thermal_act, | |
1200 | .ident = "AOpen i915GMm-HFS", | |
1201 | .matches = { | |
1202 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1203 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1204 | }, | |
1205 | }, | |
1206 | { | |
1207 | .callback = thermal_psv, | |
1208 | .ident = "AOpen i915GMm-HFS", | |
1209 | .matches = { | |
1210 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1211 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1212 | }, | |
1213 | }, | |
1214 | { | |
1215 | .callback = thermal_tzp, | |
1216 | .ident = "AOpen i915GMm-HFS", | |
1217 | .matches = { | |
1218 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1219 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1220 | }, | |
1221 | }, | |
8c99fdce LB |
1222 | { |
1223 | .callback = thermal_nocrt, | |
1224 | .ident = "Gigabyte GA-7ZX", | |
1225 | .matches = { | |
1226 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1227 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1228 | }, | |
1229 | }, | |
0b5bfa1c LB |
1230 | {} |
1231 | }; | |
0b5bfa1c | 1232 | |
4be44fcd | 1233 | static int __init acpi_thermal_init(void) |
1da177e4 | 1234 | { |
4be44fcd | 1235 | int result = 0; |
1da177e4 | 1236 | |
0b5bfa1c LB |
1237 | dmi_check_system(thermal_dmi_table); |
1238 | ||
72b33ef8 | 1239 | if (off) { |
766a8a6d | 1240 | pr_notice(PREFIX "thermal control disabled\n"); |
72b33ef8 LB |
1241 | return -ENODEV; |
1242 | } | |
43d9f87b | 1243 | |
e053dc90 BS |
1244 | acpi_thermal_pm_queue = alloc_workqueue("acpi_thermal_pm", |
1245 | WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); | |
a59ffb20 AL |
1246 | if (!acpi_thermal_pm_queue) |
1247 | return -ENODEV; | |
1248 | ||
1da177e4 | 1249 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1250 | if (result < 0) { |
1251 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1252 | return -ENODEV; |
a59ffb20 | 1253 | } |
1da177e4 | 1254 | |
d550d98d | 1255 | return 0; |
1da177e4 LT |
1256 | } |
1257 | ||
4be44fcd | 1258 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1259 | { |
1da177e4 | 1260 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1261 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1262 | |
d550d98d | 1263 | return; |
1da177e4 LT |
1264 | } |
1265 | ||
1da177e4 LT |
1266 | module_init(acpi_thermal_init); |
1267 | module_exit(acpi_thermal_exit); |