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1da177e4 LT |
1 | /* |
2 | * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
1da177e4 LT |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
20 | * | |
21 | * This driver fully implements the ACPI thermal policy as described in the | |
22 | * ACPI 2.0 Specification. | |
23 | * | |
24 | * TBD: 1. Implement passive cooling hysteresis. | |
25 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
26 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
27 | * | |
28 | */ | |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
0b5bfa1c | 32 | #include <linux/dmi.h> |
1da177e4 | 33 | #include <linux/init.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 | 35 | #include <linux/types.h> |
cd354f1a | 36 | #include <linux/jiffies.h> |
1da177e4 | 37 | #include <linux/kmod.h> |
10a0a8d4 | 38 | #include <linux/reboot.h> |
f6f5c45e | 39 | #include <linux/device.h> |
3f655ef8 | 40 | #include <linux/thermal.h> |
8b48463f | 41 | #include <linux/acpi.h> |
a59ffb20 | 42 | #include <linux/workqueue.h> |
8b48463f | 43 | #include <asm/uaccess.h> |
1da177e4 | 44 | |
a192a958 LB |
45 | #define PREFIX "ACPI: " |
46 | ||
1da177e4 | 47 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 | 48 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
1da177e4 LT |
49 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 |
50 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
51 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
52 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
53 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
54 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
55 | |
56 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
57 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
58 | ||
1da177e4 | 59 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 60 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 61 | |
1cbf4c56 | 62 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 63 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
64 | MODULE_LICENSE("GPL"); |
65 | ||
f8707ec9 LB |
66 | static int act; |
67 | module_param(act, int, 0644); | |
3c1d36da | 68 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 69 | |
c52a7419 LB |
70 | static int crt; |
71 | module_param(crt, int, 0644); | |
72 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
73 | ||
1da177e4 | 74 | static int tzp; |
730ff34d | 75 | module_param(tzp, int, 0444); |
3c1d36da | 76 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 77 | |
f5487145 LB |
78 | static int nocrt; |
79 | module_param(nocrt, int, 0); | |
8c99fdce | 80 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 81 | |
72b33ef8 LB |
82 | static int off; |
83 | module_param(off, int, 0); | |
3c1d36da | 84 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 85 | |
a70cdc52 LB |
86 | static int psv; |
87 | module_param(psv, int, 0644); | |
3c1d36da | 88 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 89 | |
a59ffb20 AL |
90 | static struct workqueue_struct *acpi_thermal_pm_queue; |
91 | ||
4be44fcd | 92 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 94 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id thermal_device_ids[] = { |
97 | {ACPI_THERMAL_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
101 | ||
90692404 | 102 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 | 103 | static int acpi_thermal_suspend(struct device *dev); |
167cffb6 | 104 | static int acpi_thermal_resume(struct device *dev); |
fae9e2a4 | 105 | #else |
a59ffb20 | 106 | #define acpi_thermal_suspend NULL |
fae9e2a4 | 107 | #define acpi_thermal_resume NULL |
90692404 | 108 | #endif |
a59ffb20 | 109 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); |
167cffb6 | 110 | |
1da177e4 | 111 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 112 | .name = "thermal", |
4be44fcd | 113 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 114 | .ids = thermal_device_ids, |
4be44fcd LB |
115 | .ops = { |
116 | .add = acpi_thermal_add, | |
117 | .remove = acpi_thermal_remove, | |
342d550d | 118 | .notify = acpi_thermal_notify, |
4be44fcd | 119 | }, |
167cffb6 | 120 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
121 | }; |
122 | ||
123 | struct acpi_thermal_state { | |
4be44fcd LB |
124 | u8 critical:1; |
125 | u8 hot:1; | |
126 | u8 passive:1; | |
127 | u8 active:1; | |
128 | u8 reserved:4; | |
129 | int active_index; | |
1da177e4 LT |
130 | }; |
131 | ||
132 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
133 | u8 valid:1; |
134 | u8 enabled:1; | |
135 | u8 reserved:6; | |
1da177e4 LT |
136 | }; |
137 | ||
138 | struct acpi_thermal_critical { | |
139 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 140 | unsigned long temperature; |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_thermal_hot { | |
144 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 145 | unsigned long temperature; |
1da177e4 LT |
146 | }; |
147 | ||
148 | struct acpi_thermal_passive { | |
149 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
150 | unsigned long temperature; |
151 | unsigned long tc1; | |
152 | unsigned long tc2; | |
153 | unsigned long tsp; | |
154 | struct acpi_handle_list devices; | |
1da177e4 LT |
155 | }; |
156 | ||
157 | struct acpi_thermal_active { | |
158 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
159 | unsigned long temperature; |
160 | struct acpi_handle_list devices; | |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_thermal_trips { | |
164 | struct acpi_thermal_critical critical; | |
4be44fcd | 165 | struct acpi_thermal_hot hot; |
1da177e4 LT |
166 | struct acpi_thermal_passive passive; |
167 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
168 | }; | |
169 | ||
170 | struct acpi_thermal_flags { | |
4be44fcd LB |
171 | u8 cooling_mode:1; /* _SCP */ |
172 | u8 devices:1; /* _TZD */ | |
173 | u8 reserved:6; | |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_thermal { | |
8348e1b1 | 177 | struct acpi_device * device; |
4be44fcd LB |
178 | acpi_bus_id name; |
179 | unsigned long temperature; | |
180 | unsigned long last_temperature; | |
181 | unsigned long polling_frequency; | |
4be44fcd | 182 | volatile u8 zombie; |
1da177e4 LT |
183 | struct acpi_thermal_flags flags; |
184 | struct acpi_thermal_state state; | |
185 | struct acpi_thermal_trips trips; | |
4be44fcd | 186 | struct acpi_handle_list devices; |
3f655ef8 ZR |
187 | struct thermal_zone_device *thermal_zone; |
188 | int tz_enabled; | |
13614e37 | 189 | int kelvin_offset; |
a59ffb20 | 190 | struct work_struct thermal_check_work; |
1da177e4 LT |
191 | }; |
192 | ||
1da177e4 LT |
193 | /* -------------------------------------------------------------------------- |
194 | Thermal Zone Management | |
195 | -------------------------------------------------------------------------- */ | |
196 | ||
4be44fcd | 197 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 198 | { |
4be44fcd | 199 | acpi_status status = AE_OK; |
27663c58 | 200 | unsigned long long tmp; |
1da177e4 LT |
201 | |
202 | if (!tz) | |
d550d98d | 203 | return -EINVAL; |
1da177e4 LT |
204 | |
205 | tz->last_temperature = tz->temperature; | |
206 | ||
27663c58 | 207 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 208 | if (ACPI_FAILURE(status)) |
d550d98d | 209 | return -ENODEV; |
1da177e4 | 210 | |
27663c58 | 211 | tz->temperature = tmp; |
4be44fcd LB |
212 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
213 | tz->temperature)); | |
1da177e4 | 214 | |
d550d98d | 215 | return 0; |
1da177e4 LT |
216 | } |
217 | ||
4be44fcd | 218 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 219 | { |
4be44fcd | 220 | acpi_status status = AE_OK; |
27663c58 | 221 | unsigned long long tmp; |
1da177e4 LT |
222 | |
223 | if (!tz) | |
d550d98d | 224 | return -EINVAL; |
1da177e4 | 225 | |
27663c58 | 226 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 227 | if (ACPI_FAILURE(status)) |
d550d98d | 228 | return -ENODEV; |
1da177e4 | 229 | |
27663c58 | 230 | tz->polling_frequency = tmp; |
4be44fcd LB |
231 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
232 | tz->polling_frequency)); | |
1da177e4 | 233 | |
d550d98d | 234 | return 0; |
1da177e4 LT |
235 | } |
236 | ||
4be44fcd | 237 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 238 | { |
1da177e4 | 239 | if (!tz) |
d550d98d | 240 | return -EINVAL; |
1da177e4 | 241 | |
0db98202 | 242 | if (!acpi_has_method(tz->device->handle, "_SCP")) { |
1da177e4 | 243 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); |
d550d98d | 244 | return -ENODEV; |
0db98202 JL |
245 | } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, |
246 | "_SCP", mode))) { | |
d550d98d | 247 | return -ENODEV; |
0db98202 | 248 | } |
1da177e4 | 249 | |
d550d98d | 250 | return 0; |
1da177e4 LT |
251 | } |
252 | ||
ce44e197 ZR |
253 | #define ACPI_TRIPS_CRITICAL 0x01 |
254 | #define ACPI_TRIPS_HOT 0x02 | |
255 | #define ACPI_TRIPS_PASSIVE 0x04 | |
256 | #define ACPI_TRIPS_ACTIVE 0x08 | |
257 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 258 | |
ce44e197 ZR |
259 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
260 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 261 | |
ce44e197 ZR |
262 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
263 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
264 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 265 | |
ce44e197 ZR |
266 | /* |
267 | * This exception is thrown out in two cases: | |
268 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
269 | * when re-evaluating the AML code. | |
270 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
271 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
272 | */ | |
273 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
274 | do { \ | |
275 | if (flags != ACPI_TRIPS_INIT) \ | |
276 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
277 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 278 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
279 | } while (0) |
280 | ||
281 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
282 | { | |
283 | acpi_status status = AE_OK; | |
27663c58 | 284 | unsigned long long tmp; |
ce44e197 ZR |
285 | struct acpi_handle_list devices; |
286 | int valid = 0; | |
287 | int i; | |
1da177e4 | 288 | |
fa809452 | 289 | /* Critical Shutdown */ |
ce44e197 ZR |
290 | if (flag & ACPI_TRIPS_CRITICAL) { |
291 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
292 | "_CRT", NULL, &tmp); |
293 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
294 | /* |
295 | * Treat freezing temperatures as invalid as well; some | |
296 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 297 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
298 | * ... so lets discard those as invalid. |
299 | */ | |
fa809452 TR |
300 | if (ACPI_FAILURE(status)) { |
301 | tz->trips.critical.flags.valid = 0; | |
302 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
303 | "No critical threshold\n")); | |
304 | } else if (tmp <= 2732) { | |
766a8a6d AS |
305 | pr_warn(FW_BUG "Invalid critical threshold (%llu)\n", |
306 | tmp); | |
c52a7419 | 307 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
308 | } else { |
309 | tz->trips.critical.flags.valid = 1; | |
310 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
311 | "Found critical threshold [%lu]\n", |
312 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
313 | } |
314 | if (tz->trips.critical.flags.valid == 1) { | |
315 | if (crt == -1) { | |
316 | tz->trips.critical.flags.valid = 0; | |
317 | } else if (crt > 0) { | |
e866a2e3 | 318 | unsigned long crt_k = CELSIUS_TO_DECI_KELVIN(crt); |
ce44e197 | 319 | /* |
22a94d79 | 320 | * Allow override critical threshold |
ce44e197 | 321 | */ |
22a94d79 | 322 | if (crt_k > tz->trips.critical.temperature) |
766a8a6d AS |
323 | pr_warn(PREFIX "Critical threshold %d C\n", |
324 | crt); | |
22a94d79 | 325 | tz->trips.critical.temperature = crt_k; |
ce44e197 | 326 | } |
c52a7419 LB |
327 | } |
328 | } | |
329 | ||
1da177e4 | 330 | /* Critical Sleep (optional) */ |
ce44e197 | 331 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 332 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 333 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
334 | if (ACPI_FAILURE(status)) { |
335 | tz->trips.hot.flags.valid = 0; | |
336 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
337 | "No hot threshold\n")); | |
338 | } else { | |
27663c58 | 339 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
340 | tz->trips.hot.flags.valid = 1; |
341 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
342 | "Found hot threshold [%lu]\n", | |
ee17fdf2 | 343 | tz->trips.hot.temperature)); |
ce44e197 | 344 | } |
a70cdc52 LB |
345 | } |
346 | ||
ce44e197 | 347 | /* Passive (optional) */ |
0e4240d9 ZR |
348 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
349 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
350 | valid = tz->trips.passive.flags.valid; |
351 | if (psv == -1) { | |
352 | status = AE_SUPPORT; | |
353 | } else if (psv > 0) { | |
e866a2e3 | 354 | tmp = CELSIUS_TO_DECI_KELVIN(psv); |
ce44e197 ZR |
355 | status = AE_OK; |
356 | } else { | |
357 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 358 | "_PSV", NULL, &tmp); |
ce44e197 | 359 | } |
1da177e4 | 360 | |
1da177e4 LT |
361 | if (ACPI_FAILURE(status)) |
362 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 363 | else { |
27663c58 | 364 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
365 | tz->trips.passive.flags.valid = 1; |
366 | if (flag == ACPI_TRIPS_INIT) { | |
367 | status = acpi_evaluate_integer( | |
368 | tz->device->handle, "_TC1", | |
27663c58 | 369 | NULL, &tmp); |
ce44e197 ZR |
370 | if (ACPI_FAILURE(status)) |
371 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
372 | else |
373 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
374 | status = acpi_evaluate_integer( |
375 | tz->device->handle, "_TC2", | |
27663c58 | 376 | NULL, &tmp); |
ce44e197 ZR |
377 | if (ACPI_FAILURE(status)) |
378 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
379 | else |
380 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
381 | status = acpi_evaluate_integer( |
382 | tz->device->handle, "_TSP", | |
27663c58 | 383 | NULL, &tmp); |
ce44e197 ZR |
384 | if (ACPI_FAILURE(status)) |
385 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
386 | else |
387 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
388 | } |
389 | } | |
390 | } | |
391 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
392 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
393 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
394 | NULL, &devices); | |
0e4240d9 | 395 | if (ACPI_FAILURE(status)) { |
766a8a6d | 396 | pr_warn(PREFIX "Invalid passive threshold\n"); |
1da177e4 | 397 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 398 | } |
1da177e4 | 399 | else |
ce44e197 | 400 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 401 | |
ce44e197 ZR |
402 | if (memcmp(&tz->trips.passive.devices, &devices, |
403 | sizeof(struct acpi_handle_list))) { | |
404 | memcpy(&tz->trips.passive.devices, &devices, | |
405 | sizeof(struct acpi_handle_list)); | |
406 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
407 | } | |
408 | } | |
409 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
410 | if (valid != tz->trips.passive.flags.valid) | |
411 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
412 | } | |
1da177e4 | 413 | |
ce44e197 | 414 | /* Active (optional) */ |
4be44fcd | 415 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 416 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 417 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 418 | |
f8707ec9 | 419 | if (act == -1) |
ce44e197 ZR |
420 | break; /* disable all active trip points */ |
421 | ||
0e4240d9 ZR |
422 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
423 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 424 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 425 | name, NULL, &tmp); |
ce44e197 ZR |
426 | if (ACPI_FAILURE(status)) { |
427 | tz->trips.active[i].flags.valid = 0; | |
428 | if (i == 0) | |
429 | break; | |
430 | if (act <= 0) | |
431 | break; | |
432 | if (i == 1) | |
433 | tz->trips.active[0].temperature = | |
e866a2e3 | 434 | CELSIUS_TO_DECI_KELVIN(act); |
ce44e197 ZR |
435 | else |
436 | /* | |
437 | * Don't allow override higher than | |
438 | * the next higher trip point | |
439 | */ | |
440 | tz->trips.active[i - 1].temperature = | |
441 | (tz->trips.active[i - 2].temperature < | |
e866a2e3 | 442 | CELSIUS_TO_DECI_KELVIN(act) ? |
ce44e197 | 443 | tz->trips.active[i - 2].temperature : |
e866a2e3 | 444 | CELSIUS_TO_DECI_KELVIN(act)); |
f8707ec9 | 445 | break; |
27663c58 MW |
446 | } else { |
447 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 448 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 449 | } |
f8707ec9 | 450 | } |
1da177e4 LT |
451 | |
452 | name[2] = 'L'; | |
ce44e197 ZR |
453 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
454 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
455 | status = acpi_evaluate_reference(tz->device->handle, | |
456 | name, NULL, &devices); | |
0e4240d9 | 457 | if (ACPI_FAILURE(status)) { |
766a8a6d AS |
458 | pr_warn(PREFIX "Invalid active%d threshold\n", |
459 | i); | |
ce44e197 | 460 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 461 | } |
ce44e197 ZR |
462 | else |
463 | tz->trips.active[i].flags.valid = 1; | |
464 | ||
465 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
466 | sizeof(struct acpi_handle_list))) { | |
467 | memcpy(&tz->trips.active[i].devices, &devices, | |
468 | sizeof(struct acpi_handle_list)); | |
469 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
470 | } | |
471 | } | |
472 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
473 | if (valid != tz->trips.active[i].flags.valid) | |
474 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
475 | ||
476 | if (!tz->trips.active[i].flags.valid) | |
477 | break; | |
478 | } | |
479 | ||
668e0200 LT |
480 | if ((flag & ACPI_TRIPS_DEVICES) |
481 | && acpi_has_method(tz->device->handle, "_TZD")) { | |
482 | memset(&devices, 0, sizeof(devices)); | |
ce44e197 ZR |
483 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
484 | NULL, &devices); | |
668e0200 LT |
485 | if (ACPI_SUCCESS(status) |
486 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
487 | tz->devices = devices; | |
ce44e197 ZR |
488 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
489 | } | |
1da177e4 LT |
490 | } |
491 | ||
d550d98d | 492 | return 0; |
1da177e4 LT |
493 | } |
494 | ||
ce44e197 | 495 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 496 | { |
8b7ef6d8 TR |
497 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
498 | ||
499 | if (ret) | |
500 | return ret; | |
501 | ||
502 | valid = tz->trips.critical.flags.valid | | |
503 | tz->trips.hot.flags.valid | | |
504 | tz->trips.passive.flags.valid; | |
505 | ||
506 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
507 | valid |= tz->trips.active[i].flags.valid; | |
508 | ||
509 | if (!valid) { | |
766a8a6d | 510 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
511 | return -ENODEV; |
512 | } | |
513 | return 0; | |
1da177e4 LT |
514 | } |
515 | ||
4be44fcd | 516 | static void acpi_thermal_check(void *data) |
1da177e4 | 517 | { |
50dd0969 | 518 | struct acpi_thermal *tz = data; |
1da177e4 | 519 | |
e994d713 | 520 | if (!tz->tz_enabled) |
ca4e7130 | 521 | return; |
e994d713 | 522 | |
b1569e99 | 523 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
524 | } |
525 | ||
3f655ef8 | 526 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 527 | |
17e8351a | 528 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
529 | { |
530 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 531 | int result; |
3f655ef8 ZR |
532 | |
533 | if (!tz) | |
534 | return -EINVAL; | |
535 | ||
76ecb4f2 ZR |
536 | result = acpi_thermal_get_temperature(tz); |
537 | if (result) | |
538 | return result; | |
539 | ||
7b83fd9d AL |
540 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(tz->temperature, |
541 | tz->kelvin_offset); | |
6503e5df | 542 | return 0; |
3f655ef8 ZR |
543 | } |
544 | ||
3f655ef8 | 545 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 546 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
547 | { |
548 | struct acpi_thermal *tz = thermal->devdata; | |
549 | ||
550 | if (!tz) | |
551 | return -EINVAL; | |
552 | ||
6503e5df MG |
553 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
554 | THERMAL_DEVICE_DISABLED; | |
555 | ||
556 | return 0; | |
3f655ef8 ZR |
557 | } |
558 | ||
559 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 560 | enum thermal_device_mode mode) |
3f655ef8 ZR |
561 | { |
562 | struct acpi_thermal *tz = thermal->devdata; | |
563 | int enable; | |
564 | ||
565 | if (!tz) | |
566 | return -EINVAL; | |
567 | ||
568 | /* | |
569 | * enable/disable thermal management from ACPI thermal driver | |
570 | */ | |
6503e5df | 571 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 572 | enable = 1; |
e994d713 | 573 | else if (mode == THERMAL_DEVICE_DISABLED) { |
3f655ef8 | 574 | enable = 0; |
e994d713 SP |
575 | pr_warn("thermal zone will be disabled\n"); |
576 | } else | |
3f655ef8 ZR |
577 | return -EINVAL; |
578 | ||
579 | if (enable != tz->tz_enabled) { | |
580 | tz->tz_enabled = enable; | |
581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
582 | "%s kernel ACPI thermal control\n", |
583 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
584 | acpi_thermal_check(tz); |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
589 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 590 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
591 | { |
592 | struct acpi_thermal *tz = thermal->devdata; | |
593 | int i; | |
594 | ||
595 | if (!tz || trip < 0) | |
596 | return -EINVAL; | |
597 | ||
598 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
599 | if (!trip) { |
600 | *type = THERMAL_TRIP_CRITICAL; | |
601 | return 0; | |
602 | } | |
3f655ef8 ZR |
603 | trip--; |
604 | } | |
605 | ||
606 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
607 | if (!trip) { |
608 | *type = THERMAL_TRIP_HOT; | |
609 | return 0; | |
610 | } | |
3f655ef8 ZR |
611 | trip--; |
612 | } | |
613 | ||
614 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
615 | if (!trip) { |
616 | *type = THERMAL_TRIP_PASSIVE; | |
617 | return 0; | |
618 | } | |
3f655ef8 ZR |
619 | trip--; |
620 | } | |
621 | ||
622 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
623 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
624 | if (!trip) { |
625 | *type = THERMAL_TRIP_ACTIVE; | |
626 | return 0; | |
627 | } | |
3f655ef8 ZR |
628 | trip--; |
629 | } | |
630 | ||
631 | return -EINVAL; | |
632 | } | |
633 | ||
634 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 635 | int trip, int *temp) |
3f655ef8 ZR |
636 | { |
637 | struct acpi_thermal *tz = thermal->devdata; | |
638 | int i; | |
639 | ||
640 | if (!tz || trip < 0) | |
641 | return -EINVAL; | |
642 | ||
643 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 644 | if (!trip) { |
7b83fd9d | 645 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
646 | tz->trips.critical.temperature, |
647 | tz->kelvin_offset); | |
6503e5df MG |
648 | return 0; |
649 | } | |
3f655ef8 ZR |
650 | trip--; |
651 | } | |
652 | ||
653 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 654 | if (!trip) { |
7b83fd9d | 655 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
656 | tz->trips.hot.temperature, |
657 | tz->kelvin_offset); | |
6503e5df MG |
658 | return 0; |
659 | } | |
3f655ef8 ZR |
660 | trip--; |
661 | } | |
662 | ||
663 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 664 | if (!trip) { |
7b83fd9d | 665 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
666 | tz->trips.passive.temperature, |
667 | tz->kelvin_offset); | |
6503e5df MG |
668 | return 0; |
669 | } | |
3f655ef8 ZR |
670 | trip--; |
671 | } | |
672 | ||
673 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
674 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 675 | if (!trip) { |
7b83fd9d | 676 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
677 | tz->trips.active[i].temperature, |
678 | tz->kelvin_offset); | |
6503e5df MG |
679 | return 0; |
680 | } | |
3f655ef8 ZR |
681 | trip--; |
682 | } | |
683 | ||
684 | return -EINVAL; | |
685 | } | |
686 | ||
9ec732ff | 687 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
688 | int *temperature) |
689 | { | |
9ec732ff ZR |
690 | struct acpi_thermal *tz = thermal->devdata; |
691 | ||
692 | if (tz->trips.critical.flags.valid) { | |
7b83fd9d | 693 | *temperature = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
694 | tz->trips.critical.temperature, |
695 | tz->kelvin_offset); | |
9ec732ff ZR |
696 | return 0; |
697 | } else | |
698 | return -EINVAL; | |
699 | } | |
700 | ||
601f3d42 ZR |
701 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
702 | int trip, enum thermal_trend *trend) | |
703 | { | |
704 | struct acpi_thermal *tz = thermal->devdata; | |
705 | enum thermal_trip_type type; | |
706 | int i; | |
707 | ||
708 | if (thermal_get_trip_type(thermal, trip, &type)) | |
709 | return -EINVAL; | |
710 | ||
4ae46bef | 711 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a SH |
712 | int trip_temp; |
713 | int temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( | |
7b83fd9d | 714 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
715 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
716 | return -EINVAL; | |
717 | ||
718 | if (temp > trip_temp) { | |
719 | *trend = THERMAL_TREND_RAISING; | |
720 | return 0; | |
721 | } else { | |
722 | /* Fall back on default trend */ | |
723 | return -EINVAL; | |
724 | } | |
4ae46bef | 725 | } |
601f3d42 ZR |
726 | |
727 | /* | |
728 | * tz->temperature has already been updated by generic thermal layer, | |
729 | * before this callback being invoked | |
730 | */ | |
731 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
732 | + (tz->trips.passive.tc2 | |
733 | * (tz->temperature - tz->trips.passive.temperature)); | |
734 | ||
735 | if (i > 0) | |
736 | *trend = THERMAL_TREND_RAISING; | |
737 | else if (i < 0) | |
738 | *trend = THERMAL_TREND_DROPPING; | |
739 | else | |
740 | *trend = THERMAL_TREND_STABLE; | |
741 | return 0; | |
742 | } | |
743 | ||
744 | ||
b1569e99 MG |
745 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
746 | enum thermal_trip_type trip_type) | |
747 | { | |
748 | u8 type = 0; | |
749 | struct acpi_thermal *tz = thermal->devdata; | |
750 | ||
751 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
752 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
753 | else if (trip_type == THERMAL_TRIP_HOT) | |
754 | type = ACPI_THERMAL_NOTIFY_HOT; | |
755 | else | |
756 | return 0; | |
757 | ||
b1569e99 | 758 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 759 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
760 | |
761 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
762 | return 1; | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
3f655ef8 ZR |
767 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
768 | struct thermal_cooling_device *cdev, | |
9d99842f | 769 | bool bind) |
3f655ef8 ZR |
770 | { |
771 | struct acpi_device *device = cdev->devdata; | |
772 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
773 | struct acpi_device *dev; |
774 | acpi_status status; | |
775 | acpi_handle handle; | |
3f655ef8 ZR |
776 | int i; |
777 | int j; | |
778 | int trip = -1; | |
779 | int result = 0; | |
780 | ||
781 | if (tz->trips.critical.flags.valid) | |
782 | trip++; | |
783 | ||
784 | if (tz->trips.hot.flags.valid) | |
785 | trip++; | |
786 | ||
787 | if (tz->trips.passive.flags.valid) { | |
788 | trip++; | |
789 | for (i = 0; i < tz->trips.passive.devices.count; | |
790 | i++) { | |
653a00c9 ZR |
791 | handle = tz->trips.passive.devices.handles[i]; |
792 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
793 | if (ACPI_FAILURE(status) || dev != device) |
794 | continue; | |
795 | if (bind) | |
796 | result = | |
797 | thermal_zone_bind_cooling_device | |
798 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
799 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
800 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
801 | else |
802 | result = | |
803 | thermal_zone_unbind_cooling_device | |
804 | (thermal, trip, cdev); | |
805 | if (result) | |
806 | goto failed; | |
3f655ef8 ZR |
807 | } |
808 | } | |
809 | ||
810 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
811 | if (!tz->trips.active[i].flags.valid) | |
812 | break; | |
813 | trip++; | |
814 | for (j = 0; | |
815 | j < tz->trips.active[i].devices.count; | |
816 | j++) { | |
653a00c9 ZR |
817 | handle = tz->trips.active[i].devices.handles[j]; |
818 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
819 | if (ACPI_FAILURE(status) || dev != device) |
820 | continue; | |
821 | if (bind) | |
822 | result = thermal_zone_bind_cooling_device | |
823 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
824 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
825 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
826 | else |
827 | result = thermal_zone_unbind_cooling_device | |
828 | (thermal, trip, cdev); | |
829 | if (result) | |
830 | goto failed; | |
3f655ef8 ZR |
831 | } |
832 | } | |
833 | ||
834 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
835 | handle = tz->devices.handles[i]; |
836 | status = acpi_bus_get_device(handle, &dev); | |
837 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
838 | if (bind) |
839 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
840 | (thermal, THERMAL_TRIPS_NONE, |
841 | cdev, THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
842 | THERMAL_NO_LIMIT, |
843 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
844 | else |
845 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
846 | (thermal, THERMAL_TRIPS_NONE, |
847 | cdev); | |
653a00c9 ZR |
848 | if (result) |
849 | goto failed; | |
850 | } | |
3f655ef8 ZR |
851 | } |
852 | ||
853 | failed: | |
854 | return result; | |
855 | } | |
856 | ||
857 | static int | |
858 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
859 | struct thermal_cooling_device *cdev) | |
860 | { | |
9d99842f | 861 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
862 | } |
863 | ||
864 | static int | |
865 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
866 | struct thermal_cooling_device *cdev) | |
867 | { | |
9d99842f | 868 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
869 | } |
870 | ||
ec9c9c2e | 871 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
872 | .bind = acpi_thermal_bind_cooling_device, |
873 | .unbind = acpi_thermal_unbind_cooling_device, | |
874 | .get_temp = thermal_get_temp, | |
875 | .get_mode = thermal_get_mode, | |
876 | .set_mode = thermal_set_mode, | |
877 | .get_trip_type = thermal_get_trip_type, | |
878 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 879 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 880 | .get_trend = thermal_get_trend, |
b1569e99 | 881 | .notify = thermal_notify, |
3f655ef8 ZR |
882 | }; |
883 | ||
884 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
885 | { | |
886 | int trips = 0; | |
887 | int result; | |
20733939 | 888 | acpi_status status; |
3f655ef8 ZR |
889 | int i; |
890 | ||
891 | if (tz->trips.critical.flags.valid) | |
892 | trips++; | |
893 | ||
894 | if (tz->trips.hot.flags.valid) | |
895 | trips++; | |
896 | ||
897 | if (tz->trips.passive.flags.valid) | |
898 | trips++; | |
899 | ||
900 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
901 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
902 | |
903 | if (tz->trips.passive.flags.valid) | |
904 | tz->thermal_zone = | |
c56f5c03 | 905 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 906 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
907 | tz->trips.passive.tsp*100, |
908 | tz->polling_frequency*100); | |
909 | else | |
910 | tz->thermal_zone = | |
c56f5c03 | 911 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
912 | &acpi_thermal_zone_ops, NULL, |
913 | 0, tz->polling_frequency*100); | |
bb070e43 | 914 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
915 | return -ENODEV; |
916 | ||
917 | result = sysfs_create_link(&tz->device->dev.kobj, | |
918 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
919 | if (result) | |
920 | return result; | |
921 | ||
922 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
923 | &tz->device->dev.kobj, "device"); | |
924 | if (result) | |
925 | return result; | |
926 | ||
e6f8a4d6 LT |
927 | status = acpi_bus_attach_private_data(tz->device->handle, |
928 | tz->thermal_zone); | |
929 | if (ACPI_FAILURE(status)) | |
20733939 | 930 | return -ENODEV; |
20733939 | 931 | |
3f655ef8 ZR |
932 | tz->tz_enabled = 1; |
933 | ||
fc3a8828 GKH |
934 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
935 | tz->thermal_zone->id); | |
3f655ef8 ZR |
936 | return 0; |
937 | } | |
938 | ||
939 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
940 | { | |
941 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
942 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
943 | thermal_zone_device_unregister(tz->thermal_zone); | |
944 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 945 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
946 | } |
947 | ||
948 | ||
1da177e4 LT |
949 | /* -------------------------------------------------------------------------- |
950 | Driver Interface | |
951 | -------------------------------------------------------------------------- */ | |
952 | ||
342d550d | 953 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 954 | { |
342d550d | 955 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 956 | |
1da177e4 LT |
957 | |
958 | if (!tz) | |
d550d98d | 959 | return; |
1da177e4 | 960 | |
1da177e4 LT |
961 | switch (event) { |
962 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
963 | acpi_thermal_check(tz); | |
964 | break; | |
965 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 966 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 967 | acpi_thermal_check(tz); |
962ce8ca | 968 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 969 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
970 | break; |
971 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
972 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
973 | acpi_thermal_check(tz); | |
962ce8ca | 974 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 975 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
976 | break; |
977 | default: | |
978 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 979 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
980 | break; |
981 | } | |
1da177e4 LT |
982 | } |
983 | ||
261cba2d ZR |
984 | /* |
985 | * On some platforms, the AML code has dependency about | |
986 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
987 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
988 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
989 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
990 | * if _TMP has never been evaluated. | |
991 | * | |
992 | * As this dependency is totally transparent to OS, evaluate | |
993 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
994 | * _TMP, before they are actually used. | |
995 | */ | |
996 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
997 | { | |
998 | acpi_handle handle = tz->device->handle; | |
999 | unsigned long long value; | |
1000 | int i; | |
1001 | ||
1002 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
1003 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
1004 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
1005 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1006 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
1007 | acpi_status status; | |
1008 | ||
1009 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
1010 | if (status == AE_NOT_FOUND) | |
1011 | break; | |
1012 | } | |
1013 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
1014 | } | |
1015 | ||
4be44fcd | 1016 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1017 | { |
4be44fcd | 1018 | int result = 0; |
1da177e4 | 1019 | |
1da177e4 LT |
1020 | |
1021 | if (!tz) | |
d550d98d | 1022 | return -EINVAL; |
1da177e4 | 1023 | |
261cba2d ZR |
1024 | acpi_thermal_aml_dependency_fix(tz); |
1025 | ||
9bcb8118 MG |
1026 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1027 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1028 | if (result) |
d550d98d | 1029 | return result; |
1da177e4 | 1030 | |
9bcb8118 MG |
1031 | /* Get temperature [_TMP] (required) */ |
1032 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1033 | if (result) |
d550d98d | 1034 | return result; |
1da177e4 LT |
1035 | |
1036 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1037 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1038 | if (!result) |
1da177e4 | 1039 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1040 | |
1041 | /* Get default polling frequency [_TZP] (optional) */ | |
1042 | if (tzp) | |
1043 | tz->polling_frequency = tzp; | |
1044 | else | |
1045 | acpi_thermal_get_polling_frequency(tz); | |
1046 | ||
d550d98d | 1047 | return 0; |
1da177e4 LT |
1048 | } |
1049 | ||
13614e37 JD |
1050 | /* |
1051 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1052 | * handles temperature values with a single decimal place. As a consequence, | |
1053 | * some implementations use an offset of 273.1 and others use an offset of | |
1054 | * 273.2. Try to find out which one is being used, to present the most | |
1055 | * accurate and visually appealing number. | |
1056 | * | |
1057 | * The heuristic below should work for all ACPI thermal zones which have a | |
1058 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1059 | */ | |
1060 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1061 | { | |
1062 | if (tz->trips.critical.flags.valid && | |
1063 | (tz->trips.critical.temperature % 5) == 1) | |
1064 | tz->kelvin_offset = 2731; | |
1065 | else | |
1066 | tz->kelvin_offset = 2732; | |
1067 | } | |
1068 | ||
a59ffb20 AL |
1069 | static void acpi_thermal_check_fn(struct work_struct *work) |
1070 | { | |
1071 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
1072 | thermal_check_work); | |
1073 | acpi_thermal_check(tz); | |
1074 | } | |
1075 | ||
4be44fcd | 1076 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1077 | { |
4be44fcd | 1078 | int result = 0; |
4be44fcd | 1079 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1080 | |
1da177e4 LT |
1081 | |
1082 | if (!device) | |
d550d98d | 1083 | return -EINVAL; |
1da177e4 | 1084 | |
36bcbec7 | 1085 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1086 | if (!tz) |
d550d98d | 1087 | return -ENOMEM; |
1da177e4 | 1088 | |
8348e1b1 | 1089 | tz->device = device; |
1da177e4 LT |
1090 | strcpy(tz->name, device->pnp.bus_id); |
1091 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1092 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1093 | device->driver_data = tz; |
3f655ef8 | 1094 | |
1da177e4 LT |
1095 | result = acpi_thermal_get_info(tz); |
1096 | if (result) | |
3f655ef8 ZR |
1097 | goto free_memory; |
1098 | ||
13614e37 JD |
1099 | acpi_thermal_guess_offset(tz); |
1100 | ||
3f655ef8 ZR |
1101 | result = acpi_thermal_register_thermal_zone(tz); |
1102 | if (result) | |
1103 | goto free_memory; | |
1da177e4 | 1104 | |
a59ffb20 AL |
1105 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1106 | ||
766a8a6d | 1107 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
e866a2e3 | 1108 | acpi_device_bid(device), DECI_KELVIN_TO_CELSIUS(tz->temperature)); |
3f655ef8 | 1109 | goto end; |
1da177e4 | 1110 | |
3f655ef8 ZR |
1111 | free_memory: |
1112 | kfree(tz); | |
1113 | end: | |
d550d98d | 1114 | return result; |
1da177e4 LT |
1115 | } |
1116 | ||
51fac838 | 1117 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1118 | { |
4be44fcd | 1119 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1120 | |
1da177e4 | 1121 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1122 | return -EINVAL; |
1da177e4 | 1123 | |
a59ffb20 | 1124 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1125 | tz = acpi_driver_data(device); |
1da177e4 | 1126 | |
3f655ef8 | 1127 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1128 | kfree(tz); |
d550d98d | 1129 | return 0; |
1da177e4 LT |
1130 | } |
1131 | ||
90692404 | 1132 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1133 | static int acpi_thermal_suspend(struct device *dev) |
1134 | { | |
1135 | /* Make sure the previously queued thermal check work has been done */ | |
1136 | flush_workqueue(acpi_thermal_pm_queue); | |
1137 | return 0; | |
1138 | } | |
1139 | ||
167cffb6 | 1140 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1141 | { |
167cffb6 | 1142 | struct acpi_thermal *tz; |
b1028c54 KK |
1143 | int i, j, power_state, result; |
1144 | ||
167cffb6 | 1145 | if (!dev) |
d550d98d | 1146 | return -EINVAL; |
74ce1468 | 1147 | |
167cffb6 RW |
1148 | tz = acpi_driver_data(to_acpi_device(dev)); |
1149 | if (!tz) | |
1150 | return -EINVAL; | |
74ce1468 | 1151 | |
bed936f7 | 1152 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1153 | if (!(&tz->trips.active[i])) |
1154 | break; | |
1155 | if (!tz->trips.active[i].flags.valid) | |
1156 | break; | |
1157 | tz->trips.active[i].flags.enabled = 1; | |
1158 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1159 | result = acpi_bus_update_power( |
1160 | tz->trips.active[i].devices.handles[j], | |
1161 | &power_state); | |
b1028c54 KK |
1162 | if (result || (power_state != ACPI_STATE_D0)) { |
1163 | tz->trips.active[i].flags.enabled = 0; | |
1164 | break; | |
1165 | } | |
bed936f7 | 1166 | } |
b1028c54 | 1167 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1168 | } |
1169 | ||
a59ffb20 | 1170 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); |
74ce1468 KK |
1171 | |
1172 | return AE_OK; | |
1173 | } | |
90692404 | 1174 | #endif |
74ce1468 | 1175 | |
1855256c | 1176 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1177 | |
1178 | if (act == 0) { | |
766a8a6d AS |
1179 | pr_notice(PREFIX "%s detected: " |
1180 | "disabling all active thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1181 | act = -1; |
1182 | } | |
1183 | return 0; | |
1184 | } | |
1855256c | 1185 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1186 | |
766a8a6d AS |
1187 | pr_notice(PREFIX "%s detected: " |
1188 | "disabling all critical thermal trip point actions.\n", d->ident); | |
8c99fdce LB |
1189 | nocrt = 1; |
1190 | return 0; | |
1191 | } | |
1855256c | 1192 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1193 | |
1194 | if (tzp == 0) { | |
766a8a6d AS |
1195 | pr_notice(PREFIX "%s detected: " |
1196 | "enabling thermal zone polling\n", d->ident); | |
0b5bfa1c LB |
1197 | tzp = 300; /* 300 dS = 30 Seconds */ |
1198 | } | |
1199 | return 0; | |
1200 | } | |
1855256c | 1201 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1202 | |
1203 | if (psv == 0) { | |
766a8a6d AS |
1204 | pr_notice(PREFIX "%s detected: " |
1205 | "disabling all passive thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1206 | psv = -1; |
1207 | } | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1212 | /* | |
1213 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1214 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1215 | */ | |
1216 | { | |
1217 | .callback = thermal_act, | |
1218 | .ident = "AOpen i915GMm-HFS", | |
1219 | .matches = { | |
1220 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1221 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1222 | }, | |
1223 | }, | |
1224 | { | |
1225 | .callback = thermal_psv, | |
1226 | .ident = "AOpen i915GMm-HFS", | |
1227 | .matches = { | |
1228 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1229 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1230 | }, | |
1231 | }, | |
1232 | { | |
1233 | .callback = thermal_tzp, | |
1234 | .ident = "AOpen i915GMm-HFS", | |
1235 | .matches = { | |
1236 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1237 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1238 | }, | |
1239 | }, | |
8c99fdce LB |
1240 | { |
1241 | .callback = thermal_nocrt, | |
1242 | .ident = "Gigabyte GA-7ZX", | |
1243 | .matches = { | |
1244 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1245 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1246 | }, | |
1247 | }, | |
0b5bfa1c LB |
1248 | {} |
1249 | }; | |
0b5bfa1c | 1250 | |
4be44fcd | 1251 | static int __init acpi_thermal_init(void) |
1da177e4 | 1252 | { |
4be44fcd | 1253 | int result = 0; |
1da177e4 | 1254 | |
0b5bfa1c LB |
1255 | dmi_check_system(thermal_dmi_table); |
1256 | ||
72b33ef8 | 1257 | if (off) { |
766a8a6d | 1258 | pr_notice(PREFIX "thermal control disabled\n"); |
72b33ef8 LB |
1259 | return -ENODEV; |
1260 | } | |
43d9f87b | 1261 | |
a59ffb20 AL |
1262 | acpi_thermal_pm_queue = create_workqueue("acpi_thermal_pm"); |
1263 | if (!acpi_thermal_pm_queue) | |
1264 | return -ENODEV; | |
1265 | ||
1da177e4 | 1266 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1267 | if (result < 0) { |
1268 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1269 | return -ENODEV; |
a59ffb20 | 1270 | } |
1da177e4 | 1271 | |
d550d98d | 1272 | return 0; |
1da177e4 LT |
1273 | } |
1274 | ||
4be44fcd | 1275 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1276 | { |
1da177e4 | 1277 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1278 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1279 | |
d550d98d | 1280 | return; |
1da177e4 LT |
1281 | } |
1282 | ||
1da177e4 LT |
1283 | module_init(acpi_thermal_init); |
1284 | module_exit(acpi_thermal_exit); |