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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 | ||
f86b15a1 RW |
16 | #define pr_fmt(fmt) "ACPI: thermal: " fmt |
17 | ||
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/module.h> | |
0b5bfa1c | 20 | #include <linux/dmi.h> |
1da177e4 | 21 | #include <linux/init.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1da177e4 | 23 | #include <linux/types.h> |
cd354f1a | 24 | #include <linux/jiffies.h> |
1da177e4 | 25 | #include <linux/kmod.h> |
10a0a8d4 | 26 | #include <linux/reboot.h> |
f6f5c45e | 27 | #include <linux/device.h> |
3f655ef8 | 28 | #include <linux/thermal.h> |
8b48463f | 29 | #include <linux/acpi.h> |
a59ffb20 | 30 | #include <linux/workqueue.h> |
7c0f6ba6 | 31 | #include <linux/uaccess.h> |
7f49a5cb | 32 | #include <linux/units.h> |
1da177e4 | 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 | ||
1cbf4c56 | 46 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 47 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
48 | MODULE_LICENSE("GPL"); |
49 | ||
f8707ec9 LB |
50 | static int act; |
51 | module_param(act, int, 0644); | |
3c1d36da | 52 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 53 | |
c52a7419 LB |
54 | static int crt; |
55 | module_param(crt, int, 0644); | |
56 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
57 | ||
1da177e4 | 58 | static int tzp; |
730ff34d | 59 | module_param(tzp, int, 0444); |
3c1d36da | 60 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 61 | |
f5487145 LB |
62 | static int nocrt; |
63 | module_param(nocrt, int, 0); | |
8c99fdce | 64 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 65 | |
72b33ef8 LB |
66 | static int off; |
67 | module_param(off, int, 0); | |
3c1d36da | 68 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 69 | |
a70cdc52 LB |
70 | static int psv; |
71 | module_param(psv, int, 0644); | |
3c1d36da | 72 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 73 | |
a59ffb20 AL |
74 | static struct workqueue_struct *acpi_thermal_pm_queue; |
75 | ||
4be44fcd | 76 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 77 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 78 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 79 | |
1ba90e3a TR |
80 | static const struct acpi_device_id thermal_device_ids[] = { |
81 | {ACPI_THERMAL_HID, 0}, | |
82 | {"", 0}, | |
83 | }; | |
84 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
85 | ||
90692404 | 86 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 | 87 | static int acpi_thermal_suspend(struct device *dev); |
167cffb6 | 88 | static int acpi_thermal_resume(struct device *dev); |
fae9e2a4 | 89 | #else |
a59ffb20 | 90 | #define acpi_thermal_suspend NULL |
fae9e2a4 | 91 | #define acpi_thermal_resume NULL |
90692404 | 92 | #endif |
a59ffb20 | 93 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); |
167cffb6 | 94 | |
1da177e4 | 95 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 96 | .name = "thermal", |
4be44fcd | 97 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 98 | .ids = thermal_device_ids, |
4be44fcd LB |
99 | .ops = { |
100 | .add = acpi_thermal_add, | |
101 | .remove = acpi_thermal_remove, | |
342d550d | 102 | .notify = acpi_thermal_notify, |
4be44fcd | 103 | }, |
167cffb6 | 104 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
105 | }; |
106 | ||
107 | struct acpi_thermal_state { | |
4be44fcd LB |
108 | u8 critical:1; |
109 | u8 hot:1; | |
110 | u8 passive:1; | |
111 | u8 active:1; | |
112 | u8 reserved:4; | |
113 | int active_index; | |
1da177e4 LT |
114 | }; |
115 | ||
116 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
117 | u8 valid:1; |
118 | u8 enabled:1; | |
119 | u8 reserved:6; | |
1da177e4 LT |
120 | }; |
121 | ||
122 | struct acpi_thermal_critical { | |
123 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 124 | unsigned long temperature; |
1da177e4 LT |
125 | }; |
126 | ||
127 | struct acpi_thermal_hot { | |
128 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 129 | unsigned long temperature; |
1da177e4 LT |
130 | }; |
131 | ||
132 | struct acpi_thermal_passive { | |
133 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
134 | unsigned long temperature; |
135 | unsigned long tc1; | |
136 | unsigned long tc2; | |
137 | unsigned long tsp; | |
138 | struct acpi_handle_list devices; | |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_thermal_active { | |
142 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
143 | unsigned long temperature; |
144 | struct acpi_handle_list devices; | |
1da177e4 LT |
145 | }; |
146 | ||
147 | struct acpi_thermal_trips { | |
148 | struct acpi_thermal_critical critical; | |
4be44fcd | 149 | struct acpi_thermal_hot hot; |
1da177e4 LT |
150 | struct acpi_thermal_passive passive; |
151 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
152 | }; | |
153 | ||
154 | struct acpi_thermal_flags { | |
4be44fcd LB |
155 | u8 cooling_mode:1; /* _SCP */ |
156 | u8 devices:1; /* _TZD */ | |
157 | u8 reserved:6; | |
1da177e4 LT |
158 | }; |
159 | ||
160 | struct acpi_thermal { | |
8348e1b1 | 161 | struct acpi_device * device; |
4be44fcd LB |
162 | acpi_bus_id name; |
163 | unsigned long temperature; | |
164 | unsigned long last_temperature; | |
165 | unsigned long polling_frequency; | |
4be44fcd | 166 | volatile u8 zombie; |
1da177e4 LT |
167 | struct acpi_thermal_flags flags; |
168 | struct acpi_thermal_state state; | |
169 | struct acpi_thermal_trips trips; | |
4be44fcd | 170 | struct acpi_handle_list devices; |
3f655ef8 | 171 | struct thermal_zone_device *thermal_zone; |
7f49a5cb | 172 | int kelvin_offset; /* in millidegrees */ |
a59ffb20 | 173 | struct work_struct thermal_check_work; |
81b704d3 RW |
174 | struct mutex thermal_check_lock; |
175 | refcount_t thermal_check_count; | |
1da177e4 LT |
176 | }; |
177 | ||
1da177e4 LT |
178 | /* -------------------------------------------------------------------------- |
179 | Thermal Zone Management | |
180 | -------------------------------------------------------------------------- */ | |
181 | ||
4be44fcd | 182 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 183 | { |
4be44fcd | 184 | acpi_status status = AE_OK; |
27663c58 | 185 | unsigned long long tmp; |
1da177e4 LT |
186 | |
187 | if (!tz) | |
d550d98d | 188 | return -EINVAL; |
1da177e4 LT |
189 | |
190 | tz->last_temperature = tz->temperature; | |
191 | ||
27663c58 | 192 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 193 | if (ACPI_FAILURE(status)) |
d550d98d | 194 | return -ENODEV; |
1da177e4 | 195 | |
27663c58 | 196 | tz->temperature = tmp; |
f86b15a1 RW |
197 | |
198 | acpi_handle_debug(tz->device->handle, "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; |
f86b15a1 RW |
217 | acpi_handle_debug(tz->device->handle, "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 | */ | |
f86b15a1 | 255 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, tz, str) \ |
ce44e197 ZR |
256 | do { \ |
257 | if (flags != ACPI_TRIPS_INIT) \ | |
f86b15a1 | 258 | acpi_handle_info(tz->device->handle, \ |
ce44e197 | 259 | "ACPI thermal trip point %s changed\n" \ |
f86b15a1 | 260 | "Please report to linux-acpi@vger.kernel.org\n", 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; | |
f86b15a1 RW |
284 | acpi_handle_debug(tz->device->handle, |
285 | "No critical threshold\n"); | |
fa809452 | 286 | } else if (tmp <= 2732) { |
f86b15a1 | 287 | pr_info(FW_BUG "Invalid critical threshold (%llu)\n", |
766a8a6d | 288 | tmp); |
c52a7419 | 289 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
290 | } else { |
291 | tz->trips.critical.flags.valid = 1; | |
f86b15a1 | 292 | acpi_handle_debug(tz->device->handle, |
fa809452 | 293 | "Found critical threshold [%lu]\n", |
f86b15a1 | 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) |
f86b15a1 RW |
306 | pr_info("Critical threshold %d C\n", crt); |
307 | ||
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; | |
f86b15a1 RW |
319 | acpi_handle_debug(tz->device->handle, |
320 | "No hot threshold\n"); | |
ce44e197 | 321 | } else { |
27663c58 | 322 | tz->trips.hot.temperature = tmp; |
ce44e197 | 323 | tz->trips.hot.flags.valid = 1; |
f86b15a1 RW |
324 | acpi_handle_debug(tz->device->handle, |
325 | "Found hot threshold [%lu]\n", | |
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)) { |
f86b15a1 RW |
379 | acpi_handle_info(tz->device->handle, |
380 | "Invalid passive threshold\n"); | |
1da177e4 | 381 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 382 | } |
1da177e4 | 383 | else |
ce44e197 | 384 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 385 | |
ce44e197 ZR |
386 | if (memcmp(&tz->trips.passive.devices, &devices, |
387 | sizeof(struct acpi_handle_list))) { | |
388 | memcpy(&tz->trips.passive.devices, &devices, | |
389 | sizeof(struct acpi_handle_list)); | |
f86b15a1 | 390 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device"); |
ce44e197 ZR |
391 | } |
392 | } | |
393 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
394 | if (valid != tz->trips.passive.flags.valid) | |
f86b15a1 | 395 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state"); |
ce44e197 | 396 | } |
1da177e4 | 397 | |
ce44e197 | 398 | /* Active (optional) */ |
4be44fcd | 399 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 400 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 401 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 402 | |
f8707ec9 | 403 | if (act == -1) |
ce44e197 ZR |
404 | break; /* disable all active trip points */ |
405 | ||
0e4240d9 ZR |
406 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
407 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 408 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 409 | name, NULL, &tmp); |
ce44e197 ZR |
410 | if (ACPI_FAILURE(status)) { |
411 | tz->trips.active[i].flags.valid = 0; | |
412 | if (i == 0) | |
413 | break; | |
414 | if (act <= 0) | |
415 | break; | |
416 | if (i == 1) | |
417 | tz->trips.active[0].temperature = | |
7f49a5cb | 418 | celsius_to_deci_kelvin(act); |
ce44e197 ZR |
419 | else |
420 | /* | |
421 | * Don't allow override higher than | |
422 | * the next higher trip point | |
423 | */ | |
424 | tz->trips.active[i - 1].temperature = | |
425 | (tz->trips.active[i - 2].temperature < | |
7f49a5cb | 426 | celsius_to_deci_kelvin(act) ? |
ce44e197 | 427 | tz->trips.active[i - 2].temperature : |
7f49a5cb | 428 | celsius_to_deci_kelvin(act)); |
f8707ec9 | 429 | break; |
27663c58 MW |
430 | } else { |
431 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 432 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 433 | } |
f8707ec9 | 434 | } |
1da177e4 LT |
435 | |
436 | name[2] = 'L'; | |
ce44e197 ZR |
437 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
438 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
439 | status = acpi_evaluate_reference(tz->device->handle, | |
440 | name, NULL, &devices); | |
0e4240d9 | 441 | if (ACPI_FAILURE(status)) { |
f86b15a1 RW |
442 | acpi_handle_info(tz->device->handle, |
443 | "Invalid active%d threshold\n", i); | |
ce44e197 | 444 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 445 | } |
ce44e197 ZR |
446 | else |
447 | tz->trips.active[i].flags.valid = 1; | |
448 | ||
449 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
450 | sizeof(struct acpi_handle_list))) { | |
451 | memcpy(&tz->trips.active[i].devices, &devices, | |
452 | sizeof(struct acpi_handle_list)); | |
f86b15a1 | 453 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device"); |
ce44e197 ZR |
454 | } |
455 | } | |
456 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
457 | if (valid != tz->trips.active[i].flags.valid) | |
f86b15a1 | 458 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state"); |
ce44e197 ZR |
459 | |
460 | if (!tz->trips.active[i].flags.valid) | |
461 | break; | |
462 | } | |
463 | ||
e88c7409 | 464 | if (flag & ACPI_TRIPS_DEVICES) { |
668e0200 | 465 | memset(&devices, 0, sizeof(devices)); |
ce44e197 ZR |
466 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
467 | NULL, &devices); | |
668e0200 LT |
468 | if (ACPI_SUCCESS(status) |
469 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
470 | tz->devices = devices; | |
f86b15a1 | 471 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device"); |
ce44e197 | 472 | } |
1da177e4 LT |
473 | } |
474 | ||
d550d98d | 475 | return 0; |
1da177e4 LT |
476 | } |
477 | ||
ce44e197 | 478 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 479 | { |
8b7ef6d8 TR |
480 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
481 | ||
482 | if (ret) | |
483 | return ret; | |
484 | ||
485 | valid = tz->trips.critical.flags.valid | | |
486 | tz->trips.hot.flags.valid | | |
487 | tz->trips.passive.flags.valid; | |
488 | ||
489 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
490 | valid |= tz->trips.active[i].flags.valid; | |
491 | ||
492 | if (!valid) { | |
766a8a6d | 493 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
494 | return -ENODEV; |
495 | } | |
496 | return 0; | |
1da177e4 LT |
497 | } |
498 | ||
3f655ef8 | 499 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 500 | |
17e8351a | 501 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
502 | { |
503 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 504 | int result; |
3f655ef8 ZR |
505 | |
506 | if (!tz) | |
507 | return -EINVAL; | |
508 | ||
76ecb4f2 ZR |
509 | result = acpi_thermal_get_temperature(tz); |
510 | if (result) | |
511 | return result; | |
512 | ||
7f49a5cb | 513 | *temp = deci_kelvin_to_millicelsius_with_offset(tz->temperature, |
7b83fd9d | 514 | tz->kelvin_offset); |
6503e5df | 515 | return 0; |
3f655ef8 ZR |
516 | } |
517 | ||
3f655ef8 | 518 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, |
6503e5df | 519 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
520 | { |
521 | struct acpi_thermal *tz = thermal->devdata; | |
522 | int i; | |
523 | ||
524 | if (!tz || trip < 0) | |
525 | return -EINVAL; | |
526 | ||
527 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
528 | if (!trip) { |
529 | *type = THERMAL_TRIP_CRITICAL; | |
530 | return 0; | |
531 | } | |
3f655ef8 ZR |
532 | trip--; |
533 | } | |
534 | ||
535 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
536 | if (!trip) { |
537 | *type = THERMAL_TRIP_HOT; | |
538 | return 0; | |
539 | } | |
3f655ef8 ZR |
540 | trip--; |
541 | } | |
542 | ||
543 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
544 | if (!trip) { |
545 | *type = THERMAL_TRIP_PASSIVE; | |
546 | return 0; | |
547 | } | |
3f655ef8 ZR |
548 | trip--; |
549 | } | |
550 | ||
551 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
552 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
553 | if (!trip) { |
554 | *type = THERMAL_TRIP_ACTIVE; | |
555 | return 0; | |
556 | } | |
3f655ef8 ZR |
557 | trip--; |
558 | } | |
559 | ||
560 | return -EINVAL; | |
561 | } | |
562 | ||
563 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 564 | int trip, int *temp) |
3f655ef8 ZR |
565 | { |
566 | struct acpi_thermal *tz = thermal->devdata; | |
567 | int i; | |
568 | ||
569 | if (!tz || trip < 0) | |
570 | return -EINVAL; | |
571 | ||
572 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 573 | if (!trip) { |
7f49a5cb | 574 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
575 | tz->trips.critical.temperature, |
576 | tz->kelvin_offset); | |
6503e5df MG |
577 | return 0; |
578 | } | |
3f655ef8 ZR |
579 | trip--; |
580 | } | |
581 | ||
582 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 583 | if (!trip) { |
7f49a5cb | 584 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
585 | tz->trips.hot.temperature, |
586 | tz->kelvin_offset); | |
6503e5df MG |
587 | return 0; |
588 | } | |
3f655ef8 ZR |
589 | trip--; |
590 | } | |
591 | ||
592 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 593 | if (!trip) { |
7f49a5cb | 594 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
595 | tz->trips.passive.temperature, |
596 | tz->kelvin_offset); | |
6503e5df MG |
597 | return 0; |
598 | } | |
3f655ef8 ZR |
599 | trip--; |
600 | } | |
601 | ||
602 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
603 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 604 | if (!trip) { |
7f49a5cb | 605 | *temp = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
606 | tz->trips.active[i].temperature, |
607 | tz->kelvin_offset); | |
6503e5df MG |
608 | return 0; |
609 | } | |
3f655ef8 ZR |
610 | trip--; |
611 | } | |
612 | ||
613 | return -EINVAL; | |
614 | } | |
615 | ||
9ec732ff | 616 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
617 | int *temperature) |
618 | { | |
9ec732ff ZR |
619 | struct acpi_thermal *tz = thermal->devdata; |
620 | ||
621 | if (tz->trips.critical.flags.valid) { | |
7f49a5cb | 622 | *temperature = deci_kelvin_to_millicelsius_with_offset( |
13614e37 JD |
623 | tz->trips.critical.temperature, |
624 | tz->kelvin_offset); | |
9ec732ff ZR |
625 | return 0; |
626 | } else | |
627 | return -EINVAL; | |
628 | } | |
629 | ||
601f3d42 ZR |
630 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
631 | int trip, enum thermal_trend *trend) | |
632 | { | |
633 | struct acpi_thermal *tz = thermal->devdata; | |
634 | enum thermal_trip_type type; | |
635 | int i; | |
636 | ||
637 | if (thermal_get_trip_type(thermal, trip, &type)) | |
638 | return -EINVAL; | |
639 | ||
4ae46bef | 640 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a | 641 | int trip_temp; |
7f49a5cb | 642 | int temp = deci_kelvin_to_millicelsius_with_offset( |
7b83fd9d | 643 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
644 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
645 | return -EINVAL; | |
646 | ||
647 | if (temp > trip_temp) { | |
648 | *trend = THERMAL_TREND_RAISING; | |
649 | return 0; | |
650 | } else { | |
651 | /* Fall back on default trend */ | |
652 | return -EINVAL; | |
653 | } | |
4ae46bef | 654 | } |
601f3d42 ZR |
655 | |
656 | /* | |
657 | * tz->temperature has already been updated by generic thermal layer, | |
658 | * before this callback being invoked | |
659 | */ | |
660 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
661 | + (tz->trips.passive.tc2 | |
662 | * (tz->temperature - tz->trips.passive.temperature)); | |
663 | ||
664 | if (i > 0) | |
665 | *trend = THERMAL_TREND_RAISING; | |
666 | else if (i < 0) | |
667 | *trend = THERMAL_TREND_DROPPING; | |
668 | else | |
669 | *trend = THERMAL_TREND_STABLE; | |
670 | return 0; | |
671 | } | |
672 | ||
a73cb202 | 673 | static void acpi_thermal_zone_device_hot(struct thermal_zone_device *thermal) |
b1569e99 | 674 | { |
b1569e99 MG |
675 | struct acpi_thermal *tz = thermal->devdata; |
676 | ||
b1569e99 | 677 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
a73cb202 DL |
678 | dev_name(&tz->device->dev), |
679 | ACPI_THERMAL_NOTIFY_HOT, 1); | |
680 | } | |
b1569e99 | 681 | |
a73cb202 DL |
682 | static void acpi_thermal_zone_device_critical(struct thermal_zone_device *thermal) |
683 | { | |
684 | struct acpi_thermal *tz = thermal->devdata; | |
b1569e99 | 685 | |
a73cb202 DL |
686 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
687 | dev_name(&tz->device->dev), | |
688 | ACPI_THERMAL_NOTIFY_CRITICAL, 1); | |
689 | ||
690 | thermal_zone_device_critical(thermal); | |
b1569e99 MG |
691 | } |
692 | ||
3f655ef8 ZR |
693 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
694 | struct thermal_cooling_device *cdev, | |
9d99842f | 695 | bool bind) |
3f655ef8 ZR |
696 | { |
697 | struct acpi_device *device = cdev->devdata; | |
698 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 | 699 | struct acpi_device *dev; |
653a00c9 | 700 | acpi_handle handle; |
3f655ef8 ZR |
701 | int i; |
702 | int j; | |
703 | int trip = -1; | |
704 | int result = 0; | |
705 | ||
706 | if (tz->trips.critical.flags.valid) | |
707 | trip++; | |
708 | ||
709 | if (tz->trips.hot.flags.valid) | |
710 | trip++; | |
711 | ||
712 | if (tz->trips.passive.flags.valid) { | |
713 | trip++; | |
714 | for (i = 0; i < tz->trips.passive.devices.count; | |
715 | i++) { | |
653a00c9 | 716 | handle = tz->trips.passive.devices.handles[i]; |
99ece713 RW |
717 | dev = acpi_fetch_acpi_dev(handle); |
718 | if (dev != device) | |
9d99842f ZR |
719 | continue; |
720 | if (bind) | |
721 | result = | |
722 | thermal_zone_bind_cooling_device | |
723 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
724 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
725 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
726 | else |
727 | result = | |
728 | thermal_zone_unbind_cooling_device | |
729 | (thermal, trip, cdev); | |
730 | if (result) | |
731 | goto failed; | |
3f655ef8 ZR |
732 | } |
733 | } | |
734 | ||
735 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
736 | if (!tz->trips.active[i].flags.valid) | |
737 | break; | |
738 | trip++; | |
739 | for (j = 0; | |
740 | j < tz->trips.active[i].devices.count; | |
741 | j++) { | |
653a00c9 | 742 | handle = tz->trips.active[i].devices.handles[j]; |
99ece713 RW |
743 | dev = acpi_fetch_acpi_dev(handle); |
744 | if (dev != device) | |
9d99842f ZR |
745 | continue; |
746 | if (bind) | |
747 | result = thermal_zone_bind_cooling_device | |
748 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
749 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
750 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
751 | else |
752 | result = thermal_zone_unbind_cooling_device | |
753 | (thermal, trip, cdev); | |
754 | if (result) | |
755 | goto failed; | |
3f655ef8 ZR |
756 | } |
757 | } | |
758 | ||
3f655ef8 ZR |
759 | failed: |
760 | return result; | |
761 | } | |
762 | ||
763 | static int | |
764 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
765 | struct thermal_cooling_device *cdev) | |
766 | { | |
9d99842f | 767 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
768 | } |
769 | ||
770 | static int | |
771 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
772 | struct thermal_cooling_device *cdev) | |
773 | { | |
9d99842f | 774 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
775 | } |
776 | ||
ec9c9c2e | 777 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
778 | .bind = acpi_thermal_bind_cooling_device, |
779 | .unbind = acpi_thermal_unbind_cooling_device, | |
780 | .get_temp = thermal_get_temp, | |
3f655ef8 ZR |
781 | .get_trip_type = thermal_get_trip_type, |
782 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 783 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 784 | .get_trend = thermal_get_trend, |
a73cb202 DL |
785 | .hot = acpi_thermal_zone_device_hot, |
786 | .critical = acpi_thermal_zone_device_critical, | |
3f655ef8 ZR |
787 | }; |
788 | ||
789 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
790 | { | |
791 | int trips = 0; | |
792 | int result; | |
20733939 | 793 | acpi_status status; |
3f655ef8 ZR |
794 | int i; |
795 | ||
796 | if (tz->trips.critical.flags.valid) | |
797 | trips++; | |
798 | ||
799 | if (tz->trips.hot.flags.valid) | |
800 | trips++; | |
801 | ||
802 | if (tz->trips.passive.flags.valid) | |
803 | trips++; | |
804 | ||
805 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
806 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
807 | |
808 | if (tz->trips.passive.flags.valid) | |
809 | tz->thermal_zone = | |
c56f5c03 | 810 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 811 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
812 | tz->trips.passive.tsp*100, |
813 | tz->polling_frequency*100); | |
814 | else | |
815 | tz->thermal_zone = | |
c56f5c03 | 816 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
817 | &acpi_thermal_zone_ops, NULL, |
818 | 0, tz->polling_frequency*100); | |
bb070e43 | 819 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
820 | return -ENODEV; |
821 | ||
822 | result = sysfs_create_link(&tz->device->dev.kobj, | |
823 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
824 | if (result) | |
172066cc | 825 | goto unregister_tzd; |
3f655ef8 ZR |
826 | |
827 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
828 | &tz->device->dev.kobj, "device"); | |
829 | if (result) | |
172066cc | 830 | goto remove_tz_link; |
3f655ef8 | 831 | |
e6f8a4d6 LT |
832 | status = acpi_bus_attach_private_data(tz->device->handle, |
833 | tz->thermal_zone); | |
172066cc AP |
834 | if (ACPI_FAILURE(status)) { |
835 | result = -ENODEV; | |
836 | goto remove_dev_link; | |
837 | } | |
20733939 | 838 | |
7f4957be AP |
839 | result = thermal_zone_device_enable(tz->thermal_zone); |
840 | if (result) | |
841 | goto acpi_bus_detach; | |
3f655ef8 | 842 | |
fc3a8828 GKH |
843 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
844 | tz->thermal_zone->id); | |
172066cc | 845 | |
3f655ef8 | 846 | return 0; |
172066cc | 847 | |
7f4957be AP |
848 | acpi_bus_detach: |
849 | acpi_bus_detach_private_data(tz->device->handle); | |
172066cc AP |
850 | remove_dev_link: |
851 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
852 | remove_tz_link: | |
853 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
854 | unregister_tzd: | |
855 | thermal_zone_device_unregister(tz->thermal_zone); | |
856 | ||
857 | return result; | |
3f655ef8 ZR |
858 | } |
859 | ||
860 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
861 | { | |
862 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
863 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
864 | thermal_zone_device_unregister(tz->thermal_zone); | |
865 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 866 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
867 | } |
868 | ||
869 | ||
1da177e4 LT |
870 | /* -------------------------------------------------------------------------- |
871 | Driver Interface | |
872 | -------------------------------------------------------------------------- */ | |
873 | ||
81b704d3 RW |
874 | static void acpi_queue_thermal_check(struct acpi_thermal *tz) |
875 | { | |
876 | if (!work_pending(&tz->thermal_check_work)) | |
877 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); | |
878 | } | |
879 | ||
342d550d | 880 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 881 | { |
342d550d | 882 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 883 | |
1da177e4 LT |
884 | |
885 | if (!tz) | |
d550d98d | 886 | return; |
1da177e4 | 887 | |
1da177e4 LT |
888 | switch (event) { |
889 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
81b704d3 | 890 | acpi_queue_thermal_check(tz); |
1da177e4 LT |
891 | break; |
892 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 893 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
81b704d3 | 894 | acpi_queue_thermal_check(tz); |
962ce8ca | 895 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 896 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
897 | break; |
898 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 | 899 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
81b704d3 | 900 | acpi_queue_thermal_check(tz); |
962ce8ca | 901 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 902 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
903 | break; |
904 | default: | |
f86b15a1 RW |
905 | acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
906 | event); | |
1da177e4 LT |
907 | break; |
908 | } | |
1da177e4 LT |
909 | } |
910 | ||
261cba2d ZR |
911 | /* |
912 | * On some platforms, the AML code has dependency about | |
913 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
914 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
915 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
916 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
917 | * if _TMP has never been evaluated. | |
918 | * | |
919 | * As this dependency is totally transparent to OS, evaluate | |
920 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
921 | * _TMP, before they are actually used. | |
922 | */ | |
923 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
924 | { | |
925 | acpi_handle handle = tz->device->handle; | |
926 | unsigned long long value; | |
927 | int i; | |
928 | ||
929 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
930 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
931 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
932 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
933 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
934 | acpi_status status; | |
935 | ||
936 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
937 | if (status == AE_NOT_FOUND) | |
938 | break; | |
939 | } | |
940 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
941 | } | |
942 | ||
4be44fcd | 943 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 944 | { |
4be44fcd | 945 | int result = 0; |
1da177e4 | 946 | |
1da177e4 LT |
947 | |
948 | if (!tz) | |
d550d98d | 949 | return -EINVAL; |
1da177e4 | 950 | |
261cba2d ZR |
951 | acpi_thermal_aml_dependency_fix(tz); |
952 | ||
9bcb8118 MG |
953 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
954 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 955 | if (result) |
d550d98d | 956 | return result; |
1da177e4 | 957 | |
9bcb8118 MG |
958 | /* Get temperature [_TMP] (required) */ |
959 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 960 | if (result) |
d550d98d | 961 | return result; |
1da177e4 LT |
962 | |
963 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
964 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 965 | if (!result) |
1da177e4 | 966 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
967 | |
968 | /* Get default polling frequency [_TZP] (optional) */ | |
969 | if (tzp) | |
970 | tz->polling_frequency = tzp; | |
971 | else | |
972 | acpi_thermal_get_polling_frequency(tz); | |
973 | ||
d550d98d | 974 | return 0; |
1da177e4 LT |
975 | } |
976 | ||
13614e37 JD |
977 | /* |
978 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
979 | * handles temperature values with a single decimal place. As a consequence, | |
980 | * some implementations use an offset of 273.1 and others use an offset of | |
981 | * 273.2. Try to find out which one is being used, to present the most | |
982 | * accurate and visually appealing number. | |
983 | * | |
984 | * The heuristic below should work for all ACPI thermal zones which have a | |
985 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
986 | */ | |
987 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
988 | { | |
989 | if (tz->trips.critical.flags.valid && | |
990 | (tz->trips.critical.temperature % 5) == 1) | |
7f49a5cb | 991 | tz->kelvin_offset = 273100; |
13614e37 | 992 | else |
7f49a5cb | 993 | tz->kelvin_offset = 273200; |
13614e37 JD |
994 | } |
995 | ||
a59ffb20 AL |
996 | static void acpi_thermal_check_fn(struct work_struct *work) |
997 | { | |
998 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
999 | thermal_check_work); | |
81b704d3 RW |
1000 | |
1001 | /* | |
1002 | * In general, it is not sufficient to check the pending bit, because | |
1003 | * subsequent instances of this function may be queued after one of them | |
1004 | * has started running (e.g. if _TMP sleeps). Avoid bailing out if just | |
1005 | * one of them is running, though, because it may have done the actual | |
1006 | * check some time ago, so allow at least one of them to block on the | |
1007 | * mutex while another one is running the update. | |
1008 | */ | |
1009 | if (!refcount_dec_not_one(&tz->thermal_check_count)) | |
1010 | return; | |
1011 | ||
1012 | mutex_lock(&tz->thermal_check_lock); | |
1013 | ||
1014 | thermal_zone_device_update(tz->thermal_zone, THERMAL_EVENT_UNSPECIFIED); | |
1015 | ||
1016 | refcount_inc(&tz->thermal_check_count); | |
1017 | ||
1018 | mutex_unlock(&tz->thermal_check_lock); | |
a59ffb20 AL |
1019 | } |
1020 | ||
4be44fcd | 1021 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1022 | { |
4be44fcd | 1023 | int result = 0; |
4be44fcd | 1024 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1025 | |
1da177e4 LT |
1026 | |
1027 | if (!device) | |
d550d98d | 1028 | return -EINVAL; |
1da177e4 | 1029 | |
36bcbec7 | 1030 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1031 | if (!tz) |
d550d98d | 1032 | return -ENOMEM; |
1da177e4 | 1033 | |
8348e1b1 | 1034 | tz->device = device; |
1da177e4 LT |
1035 | strcpy(tz->name, device->pnp.bus_id); |
1036 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1037 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1038 | device->driver_data = tz; |
3f655ef8 | 1039 | |
1da177e4 LT |
1040 | result = acpi_thermal_get_info(tz); |
1041 | if (result) | |
3f655ef8 ZR |
1042 | goto free_memory; |
1043 | ||
13614e37 JD |
1044 | acpi_thermal_guess_offset(tz); |
1045 | ||
3f655ef8 ZR |
1046 | result = acpi_thermal_register_thermal_zone(tz); |
1047 | if (result) | |
1048 | goto free_memory; | |
1da177e4 | 1049 | |
81b704d3 RW |
1050 | refcount_set(&tz->thermal_check_count, 3); |
1051 | mutex_init(&tz->thermal_check_lock); | |
a59ffb20 AL |
1052 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1053 | ||
f86b15a1 | 1054 | pr_info("%s [%s] (%ld C)\n", acpi_device_name(device), |
7f49a5cb | 1055 | acpi_device_bid(device), deci_kelvin_to_celsius(tz->temperature)); |
3f655ef8 | 1056 | goto end; |
1da177e4 | 1057 | |
3f655ef8 ZR |
1058 | free_memory: |
1059 | kfree(tz); | |
1060 | end: | |
d550d98d | 1061 | return result; |
1da177e4 LT |
1062 | } |
1063 | ||
51fac838 | 1064 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1065 | { |
4be44fcd | 1066 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1067 | |
1da177e4 | 1068 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1069 | return -EINVAL; |
1da177e4 | 1070 | |
a59ffb20 | 1071 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1072 | tz = acpi_driver_data(device); |
1da177e4 | 1073 | |
3f655ef8 | 1074 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1075 | kfree(tz); |
d550d98d | 1076 | return 0; |
1da177e4 LT |
1077 | } |
1078 | ||
90692404 | 1079 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1080 | static int acpi_thermal_suspend(struct device *dev) |
1081 | { | |
1082 | /* Make sure the previously queued thermal check work has been done */ | |
1083 | flush_workqueue(acpi_thermal_pm_queue); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
167cffb6 | 1087 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1088 | { |
167cffb6 | 1089 | struct acpi_thermal *tz; |
b1028c54 KK |
1090 | int i, j, power_state, result; |
1091 | ||
167cffb6 | 1092 | if (!dev) |
d550d98d | 1093 | return -EINVAL; |
74ce1468 | 1094 | |
167cffb6 RW |
1095 | tz = acpi_driver_data(to_acpi_device(dev)); |
1096 | if (!tz) | |
1097 | return -EINVAL; | |
74ce1468 | 1098 | |
bed936f7 | 1099 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1100 | if (!tz->trips.active[i].flags.valid) |
1101 | break; | |
1102 | tz->trips.active[i].flags.enabled = 1; | |
1103 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1104 | result = acpi_bus_update_power( |
1105 | tz->trips.active[i].devices.handles[j], | |
1106 | &power_state); | |
b1028c54 KK |
1107 | if (result || (power_state != ACPI_STATE_D0)) { |
1108 | tz->trips.active[i].flags.enabled = 0; | |
1109 | break; | |
1110 | } | |
bed936f7 | 1111 | } |
b1028c54 | 1112 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1113 | } |
1114 | ||
81b704d3 | 1115 | acpi_queue_thermal_check(tz); |
74ce1468 KK |
1116 | |
1117 | return AE_OK; | |
1118 | } | |
90692404 | 1119 | #endif |
74ce1468 | 1120 | |
1855256c | 1121 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1122 | |
1123 | if (act == 0) { | |
f86b15a1 RW |
1124 | pr_notice("%s detected: disabling all active thermal trip points\n", |
1125 | d->ident); | |
0b5bfa1c LB |
1126 | act = -1; |
1127 | } | |
1128 | return 0; | |
1129 | } | |
1855256c | 1130 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1131 | |
f86b15a1 RW |
1132 | pr_notice("%s detected: disabling all critical thermal trip point actions.\n", |
1133 | d->ident); | |
8c99fdce LB |
1134 | nocrt = 1; |
1135 | return 0; | |
1136 | } | |
1855256c | 1137 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1138 | |
1139 | if (tzp == 0) { | |
f86b15a1 RW |
1140 | pr_notice("%s detected: enabling thermal zone polling\n", |
1141 | d->ident); | |
0b5bfa1c LB |
1142 | tzp = 300; /* 300 dS = 30 Seconds */ |
1143 | } | |
1144 | return 0; | |
1145 | } | |
1855256c | 1146 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1147 | |
1148 | if (psv == 0) { | |
f86b15a1 RW |
1149 | pr_notice("%s detected: disabling all passive thermal trip points\n", |
1150 | d->ident); | |
0b5bfa1c LB |
1151 | psv = -1; |
1152 | } | |
1153 | return 0; | |
1154 | } | |
1155 | ||
6faadbbb | 1156 | static const struct dmi_system_id thermal_dmi_table[] __initconst = { |
0b5bfa1c LB |
1157 | /* |
1158 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1159 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1160 | */ | |
1161 | { | |
1162 | .callback = thermal_act, | |
1163 | .ident = "AOpen i915GMm-HFS", | |
1164 | .matches = { | |
1165 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1166 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1167 | }, | |
1168 | }, | |
1169 | { | |
1170 | .callback = thermal_psv, | |
1171 | .ident = "AOpen i915GMm-HFS", | |
1172 | .matches = { | |
1173 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1174 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1175 | }, | |
1176 | }, | |
1177 | { | |
1178 | .callback = thermal_tzp, | |
1179 | .ident = "AOpen i915GMm-HFS", | |
1180 | .matches = { | |
1181 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1182 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1183 | }, | |
1184 | }, | |
8c99fdce LB |
1185 | { |
1186 | .callback = thermal_nocrt, | |
1187 | .ident = "Gigabyte GA-7ZX", | |
1188 | .matches = { | |
1189 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1190 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1191 | }, | |
1192 | }, | |
0b5bfa1c LB |
1193 | {} |
1194 | }; | |
0b5bfa1c | 1195 | |
4be44fcd | 1196 | static int __init acpi_thermal_init(void) |
1da177e4 | 1197 | { |
4be44fcd | 1198 | int result = 0; |
1da177e4 | 1199 | |
0b5bfa1c LB |
1200 | dmi_check_system(thermal_dmi_table); |
1201 | ||
72b33ef8 | 1202 | if (off) { |
f86b15a1 | 1203 | pr_notice("thermal control disabled\n"); |
72b33ef8 LB |
1204 | return -ENODEV; |
1205 | } | |
43d9f87b | 1206 | |
e053dc90 BS |
1207 | acpi_thermal_pm_queue = alloc_workqueue("acpi_thermal_pm", |
1208 | WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); | |
a59ffb20 AL |
1209 | if (!acpi_thermal_pm_queue) |
1210 | return -ENODEV; | |
1211 | ||
1da177e4 | 1212 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1213 | if (result < 0) { |
1214 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1215 | return -ENODEV; |
a59ffb20 | 1216 | } |
1da177e4 | 1217 | |
d550d98d | 1218 | return 0; |
1da177e4 LT |
1219 | } |
1220 | ||
4be44fcd | 1221 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1222 | { |
1da177e4 | 1223 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1224 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1225 | |
d550d98d | 1226 | return; |
1da177e4 LT |
1227 | } |
1228 | ||
1da177e4 LT |
1229 | module_init(acpi_thermal_init); |
1230 | module_exit(acpi_thermal_exit); |