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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> |
7c0f6ba6 | 43 | #include <linux/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 | |
0e70f466 SP |
523 | thermal_zone_device_update(tz->thermal_zone, |
524 | THERMAL_EVENT_UNSPECIFIED); | |
1da177e4 LT |
525 | } |
526 | ||
3f655ef8 | 527 | /* sys I/F for generic thermal sysfs support */ |
5e012760 | 528 | |
17e8351a | 529 | static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) |
3f655ef8 ZR |
530 | { |
531 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 532 | int result; |
3f655ef8 ZR |
533 | |
534 | if (!tz) | |
535 | return -EINVAL; | |
536 | ||
76ecb4f2 ZR |
537 | result = acpi_thermal_get_temperature(tz); |
538 | if (result) | |
539 | return result; | |
540 | ||
7b83fd9d AL |
541 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(tz->temperature, |
542 | tz->kelvin_offset); | |
6503e5df | 543 | return 0; |
3f655ef8 ZR |
544 | } |
545 | ||
3f655ef8 | 546 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 547 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
548 | { |
549 | struct acpi_thermal *tz = thermal->devdata; | |
550 | ||
551 | if (!tz) | |
552 | return -EINVAL; | |
553 | ||
6503e5df MG |
554 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
555 | THERMAL_DEVICE_DISABLED; | |
556 | ||
557 | return 0; | |
3f655ef8 ZR |
558 | } |
559 | ||
560 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 561 | enum thermal_device_mode mode) |
3f655ef8 ZR |
562 | { |
563 | struct acpi_thermal *tz = thermal->devdata; | |
564 | int enable; | |
565 | ||
566 | if (!tz) | |
567 | return -EINVAL; | |
568 | ||
569 | /* | |
570 | * enable/disable thermal management from ACPI thermal driver | |
571 | */ | |
6503e5df | 572 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 573 | enable = 1; |
e994d713 | 574 | else if (mode == THERMAL_DEVICE_DISABLED) { |
3f655ef8 | 575 | enable = 0; |
e994d713 SP |
576 | pr_warn("thermal zone will be disabled\n"); |
577 | } else | |
3f655ef8 ZR |
578 | return -EINVAL; |
579 | ||
580 | if (enable != tz->tz_enabled) { | |
581 | tz->tz_enabled = enable; | |
582 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
583 | "%s kernel ACPI thermal control\n", |
584 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
585 | acpi_thermal_check(tz); |
586 | } | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 591 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
592 | { |
593 | struct acpi_thermal *tz = thermal->devdata; | |
594 | int i; | |
595 | ||
596 | if (!tz || trip < 0) | |
597 | return -EINVAL; | |
598 | ||
599 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
600 | if (!trip) { |
601 | *type = THERMAL_TRIP_CRITICAL; | |
602 | return 0; | |
603 | } | |
3f655ef8 ZR |
604 | trip--; |
605 | } | |
606 | ||
607 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
608 | if (!trip) { |
609 | *type = THERMAL_TRIP_HOT; | |
610 | return 0; | |
611 | } | |
3f655ef8 ZR |
612 | trip--; |
613 | } | |
614 | ||
615 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
616 | if (!trip) { |
617 | *type = THERMAL_TRIP_PASSIVE; | |
618 | return 0; | |
619 | } | |
3f655ef8 ZR |
620 | trip--; |
621 | } | |
622 | ||
623 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
624 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
625 | if (!trip) { |
626 | *type = THERMAL_TRIP_ACTIVE; | |
627 | return 0; | |
628 | } | |
3f655ef8 ZR |
629 | trip--; |
630 | } | |
631 | ||
632 | return -EINVAL; | |
633 | } | |
634 | ||
635 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
17e8351a | 636 | int trip, int *temp) |
3f655ef8 ZR |
637 | { |
638 | struct acpi_thermal *tz = thermal->devdata; | |
639 | int i; | |
640 | ||
641 | if (!tz || trip < 0) | |
642 | return -EINVAL; | |
643 | ||
644 | if (tz->trips.critical.flags.valid) { | |
6503e5df | 645 | if (!trip) { |
7b83fd9d | 646 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
647 | tz->trips.critical.temperature, |
648 | tz->kelvin_offset); | |
6503e5df MG |
649 | return 0; |
650 | } | |
3f655ef8 ZR |
651 | trip--; |
652 | } | |
653 | ||
654 | if (tz->trips.hot.flags.valid) { | |
6503e5df | 655 | if (!trip) { |
7b83fd9d | 656 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
657 | tz->trips.hot.temperature, |
658 | tz->kelvin_offset); | |
6503e5df MG |
659 | return 0; |
660 | } | |
3f655ef8 ZR |
661 | trip--; |
662 | } | |
663 | ||
664 | if (tz->trips.passive.flags.valid) { | |
6503e5df | 665 | if (!trip) { |
7b83fd9d | 666 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
667 | tz->trips.passive.temperature, |
668 | tz->kelvin_offset); | |
6503e5df MG |
669 | return 0; |
670 | } | |
3f655ef8 ZR |
671 | trip--; |
672 | } | |
673 | ||
674 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
675 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df | 676 | if (!trip) { |
7b83fd9d | 677 | *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
678 | tz->trips.active[i].temperature, |
679 | tz->kelvin_offset); | |
6503e5df MG |
680 | return 0; |
681 | } | |
3f655ef8 ZR |
682 | trip--; |
683 | } | |
684 | ||
685 | return -EINVAL; | |
686 | } | |
687 | ||
9ec732ff | 688 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
17e8351a SH |
689 | int *temperature) |
690 | { | |
9ec732ff ZR |
691 | struct acpi_thermal *tz = thermal->devdata; |
692 | ||
693 | if (tz->trips.critical.flags.valid) { | |
7b83fd9d | 694 | *temperature = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( |
13614e37 JD |
695 | tz->trips.critical.temperature, |
696 | tz->kelvin_offset); | |
9ec732ff ZR |
697 | return 0; |
698 | } else | |
699 | return -EINVAL; | |
700 | } | |
701 | ||
601f3d42 ZR |
702 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
703 | int trip, enum thermal_trend *trend) | |
704 | { | |
705 | struct acpi_thermal *tz = thermal->devdata; | |
706 | enum thermal_trip_type type; | |
707 | int i; | |
708 | ||
709 | if (thermal_get_trip_type(thermal, trip, &type)) | |
710 | return -EINVAL; | |
711 | ||
4ae46bef | 712 | if (type == THERMAL_TRIP_ACTIVE) { |
17e8351a SH |
713 | int trip_temp; |
714 | int temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET( | |
7b83fd9d | 715 | tz->temperature, tz->kelvin_offset); |
94a40931 ZR |
716 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) |
717 | return -EINVAL; | |
718 | ||
719 | if (temp > trip_temp) { | |
720 | *trend = THERMAL_TREND_RAISING; | |
721 | return 0; | |
722 | } else { | |
723 | /* Fall back on default trend */ | |
724 | return -EINVAL; | |
725 | } | |
4ae46bef | 726 | } |
601f3d42 ZR |
727 | |
728 | /* | |
729 | * tz->temperature has already been updated by generic thermal layer, | |
730 | * before this callback being invoked | |
731 | */ | |
732 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
733 | + (tz->trips.passive.tc2 | |
734 | * (tz->temperature - tz->trips.passive.temperature)); | |
735 | ||
736 | if (i > 0) | |
737 | *trend = THERMAL_TREND_RAISING; | |
738 | else if (i < 0) | |
739 | *trend = THERMAL_TREND_DROPPING; | |
740 | else | |
741 | *trend = THERMAL_TREND_STABLE; | |
742 | return 0; | |
743 | } | |
744 | ||
745 | ||
b1569e99 MG |
746 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
747 | enum thermal_trip_type trip_type) | |
748 | { | |
749 | u8 type = 0; | |
750 | struct acpi_thermal *tz = thermal->devdata; | |
751 | ||
752 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
753 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
754 | else if (trip_type == THERMAL_TRIP_HOT) | |
755 | type = ACPI_THERMAL_NOTIFY_HOT; | |
756 | else | |
757 | return 0; | |
758 | ||
b1569e99 | 759 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 760 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
761 | |
762 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
763 | return 1; | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
3f655ef8 ZR |
768 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
769 | struct thermal_cooling_device *cdev, | |
9d99842f | 770 | bool bind) |
3f655ef8 ZR |
771 | { |
772 | struct acpi_device *device = cdev->devdata; | |
773 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
774 | struct acpi_device *dev; |
775 | acpi_status status; | |
776 | acpi_handle handle; | |
3f655ef8 ZR |
777 | int i; |
778 | int j; | |
779 | int trip = -1; | |
780 | int result = 0; | |
781 | ||
782 | if (tz->trips.critical.flags.valid) | |
783 | trip++; | |
784 | ||
785 | if (tz->trips.hot.flags.valid) | |
786 | trip++; | |
787 | ||
788 | if (tz->trips.passive.flags.valid) { | |
789 | trip++; | |
790 | for (i = 0; i < tz->trips.passive.devices.count; | |
791 | i++) { | |
653a00c9 ZR |
792 | handle = tz->trips.passive.devices.handles[i]; |
793 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
794 | if (ACPI_FAILURE(status) || dev != device) |
795 | continue; | |
796 | if (bind) | |
797 | result = | |
798 | thermal_zone_bind_cooling_device | |
799 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
800 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
801 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
802 | else |
803 | result = | |
804 | thermal_zone_unbind_cooling_device | |
805 | (thermal, trip, cdev); | |
806 | if (result) | |
807 | goto failed; | |
3f655ef8 ZR |
808 | } |
809 | } | |
810 | ||
811 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
812 | if (!tz->trips.active[i].flags.valid) | |
813 | break; | |
814 | trip++; | |
815 | for (j = 0; | |
816 | j < tz->trips.active[i].devices.count; | |
817 | j++) { | |
653a00c9 ZR |
818 | handle = tz->trips.active[i].devices.handles[j]; |
819 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
820 | if (ACPI_FAILURE(status) || dev != device) |
821 | continue; | |
822 | if (bind) | |
823 | result = thermal_zone_bind_cooling_device | |
824 | (thermal, trip, cdev, | |
6cd9e9f6 KS |
825 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
826 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
827 | else |
828 | result = thermal_zone_unbind_cooling_device | |
829 | (thermal, trip, cdev); | |
830 | if (result) | |
831 | goto failed; | |
3f655ef8 ZR |
832 | } |
833 | } | |
834 | ||
835 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
836 | handle = tz->devices.handles[i]; |
837 | status = acpi_bus_get_device(handle, &dev); | |
838 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
839 | if (bind) |
840 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
841 | (thermal, THERMAL_TRIPS_NONE, |
842 | cdev, THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
843 | THERMAL_NO_LIMIT, |
844 | THERMAL_WEIGHT_DEFAULT); | |
9d99842f ZR |
845 | else |
846 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
847 | (thermal, THERMAL_TRIPS_NONE, |
848 | cdev); | |
653a00c9 ZR |
849 | if (result) |
850 | goto failed; | |
851 | } | |
3f655ef8 ZR |
852 | } |
853 | ||
854 | failed: | |
855 | return result; | |
856 | } | |
857 | ||
858 | static int | |
859 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
860 | struct thermal_cooling_device *cdev) | |
861 | { | |
9d99842f | 862 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
863 | } |
864 | ||
865 | static int | |
866 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
867 | struct thermal_cooling_device *cdev) | |
868 | { | |
9d99842f | 869 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
870 | } |
871 | ||
ec9c9c2e | 872 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
873 | .bind = acpi_thermal_bind_cooling_device, |
874 | .unbind = acpi_thermal_unbind_cooling_device, | |
875 | .get_temp = thermal_get_temp, | |
876 | .get_mode = thermal_get_mode, | |
877 | .set_mode = thermal_set_mode, | |
878 | .get_trip_type = thermal_get_trip_type, | |
879 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 880 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 881 | .get_trend = thermal_get_trend, |
b1569e99 | 882 | .notify = thermal_notify, |
3f655ef8 ZR |
883 | }; |
884 | ||
885 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
886 | { | |
887 | int trips = 0; | |
888 | int result; | |
20733939 | 889 | acpi_status status; |
3f655ef8 ZR |
890 | int i; |
891 | ||
892 | if (tz->trips.critical.flags.valid) | |
893 | trips++; | |
894 | ||
895 | if (tz->trips.hot.flags.valid) | |
896 | trips++; | |
897 | ||
898 | if (tz->trips.passive.flags.valid) | |
899 | trips++; | |
900 | ||
901 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
902 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
903 | |
904 | if (tz->trips.passive.flags.valid) | |
905 | tz->thermal_zone = | |
c56f5c03 | 906 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 907 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
908 | tz->trips.passive.tsp*100, |
909 | tz->polling_frequency*100); | |
910 | else | |
911 | tz->thermal_zone = | |
c56f5c03 | 912 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
913 | &acpi_thermal_zone_ops, NULL, |
914 | 0, tz->polling_frequency*100); | |
bb070e43 | 915 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
916 | return -ENODEV; |
917 | ||
918 | result = sysfs_create_link(&tz->device->dev.kobj, | |
919 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
920 | if (result) | |
921 | return result; | |
922 | ||
923 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
924 | &tz->device->dev.kobj, "device"); | |
925 | if (result) | |
926 | return result; | |
927 | ||
e6f8a4d6 LT |
928 | status = acpi_bus_attach_private_data(tz->device->handle, |
929 | tz->thermal_zone); | |
930 | if (ACPI_FAILURE(status)) | |
20733939 | 931 | return -ENODEV; |
20733939 | 932 | |
3f655ef8 ZR |
933 | tz->tz_enabled = 1; |
934 | ||
fc3a8828 GKH |
935 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
936 | tz->thermal_zone->id); | |
3f655ef8 ZR |
937 | return 0; |
938 | } | |
939 | ||
940 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
941 | { | |
942 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
943 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
944 | thermal_zone_device_unregister(tz->thermal_zone); | |
945 | tz->thermal_zone = NULL; | |
e6f8a4d6 | 946 | acpi_bus_detach_private_data(tz->device->handle); |
3f655ef8 ZR |
947 | } |
948 | ||
949 | ||
1da177e4 LT |
950 | /* -------------------------------------------------------------------------- |
951 | Driver Interface | |
952 | -------------------------------------------------------------------------- */ | |
953 | ||
342d550d | 954 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 955 | { |
342d550d | 956 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 957 | |
1da177e4 LT |
958 | |
959 | if (!tz) | |
d550d98d | 960 | return; |
1da177e4 | 961 | |
1da177e4 LT |
962 | switch (event) { |
963 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
964 | acpi_thermal_check(tz); | |
965 | break; | |
966 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 967 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 968 | acpi_thermal_check(tz); |
962ce8ca | 969 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 970 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
971 | break; |
972 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
973 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
974 | acpi_thermal_check(tz); | |
962ce8ca | 975 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 976 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
977 | break; |
978 | default: | |
979 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 980 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
981 | break; |
982 | } | |
1da177e4 LT |
983 | } |
984 | ||
261cba2d ZR |
985 | /* |
986 | * On some platforms, the AML code has dependency about | |
987 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
988 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
989 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
990 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
991 | * if _TMP has never been evaluated. | |
992 | * | |
993 | * As this dependency is totally transparent to OS, evaluate | |
994 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
995 | * _TMP, before they are actually used. | |
996 | */ | |
997 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
998 | { | |
999 | acpi_handle handle = tz->device->handle; | |
1000 | unsigned long long value; | |
1001 | int i; | |
1002 | ||
1003 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
1004 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
1005 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
1006 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1007 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
1008 | acpi_status status; | |
1009 | ||
1010 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
1011 | if (status == AE_NOT_FOUND) | |
1012 | break; | |
1013 | } | |
1014 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
1015 | } | |
1016 | ||
4be44fcd | 1017 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1018 | { |
4be44fcd | 1019 | int result = 0; |
1da177e4 | 1020 | |
1da177e4 LT |
1021 | |
1022 | if (!tz) | |
d550d98d | 1023 | return -EINVAL; |
1da177e4 | 1024 | |
261cba2d ZR |
1025 | acpi_thermal_aml_dependency_fix(tz); |
1026 | ||
9bcb8118 MG |
1027 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1028 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1029 | if (result) |
d550d98d | 1030 | return result; |
1da177e4 | 1031 | |
9bcb8118 MG |
1032 | /* Get temperature [_TMP] (required) */ |
1033 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1034 | if (result) |
d550d98d | 1035 | return result; |
1da177e4 LT |
1036 | |
1037 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1038 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1039 | if (!result) |
1da177e4 | 1040 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1041 | |
1042 | /* Get default polling frequency [_TZP] (optional) */ | |
1043 | if (tzp) | |
1044 | tz->polling_frequency = tzp; | |
1045 | else | |
1046 | acpi_thermal_get_polling_frequency(tz); | |
1047 | ||
d550d98d | 1048 | return 0; |
1da177e4 LT |
1049 | } |
1050 | ||
13614e37 JD |
1051 | /* |
1052 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1053 | * handles temperature values with a single decimal place. As a consequence, | |
1054 | * some implementations use an offset of 273.1 and others use an offset of | |
1055 | * 273.2. Try to find out which one is being used, to present the most | |
1056 | * accurate and visually appealing number. | |
1057 | * | |
1058 | * The heuristic below should work for all ACPI thermal zones which have a | |
1059 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1060 | */ | |
1061 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1062 | { | |
1063 | if (tz->trips.critical.flags.valid && | |
1064 | (tz->trips.critical.temperature % 5) == 1) | |
1065 | tz->kelvin_offset = 2731; | |
1066 | else | |
1067 | tz->kelvin_offset = 2732; | |
1068 | } | |
1069 | ||
a59ffb20 AL |
1070 | static void acpi_thermal_check_fn(struct work_struct *work) |
1071 | { | |
1072 | struct acpi_thermal *tz = container_of(work, struct acpi_thermal, | |
1073 | thermal_check_work); | |
1074 | acpi_thermal_check(tz); | |
1075 | } | |
1076 | ||
4be44fcd | 1077 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1078 | { |
4be44fcd | 1079 | int result = 0; |
4be44fcd | 1080 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1081 | |
1da177e4 LT |
1082 | |
1083 | if (!device) | |
d550d98d | 1084 | return -EINVAL; |
1da177e4 | 1085 | |
36bcbec7 | 1086 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1087 | if (!tz) |
d550d98d | 1088 | return -ENOMEM; |
1da177e4 | 1089 | |
8348e1b1 | 1090 | tz->device = device; |
1da177e4 LT |
1091 | strcpy(tz->name, device->pnp.bus_id); |
1092 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1093 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1094 | device->driver_data = tz; |
3f655ef8 | 1095 | |
1da177e4 LT |
1096 | result = acpi_thermal_get_info(tz); |
1097 | if (result) | |
3f655ef8 ZR |
1098 | goto free_memory; |
1099 | ||
13614e37 JD |
1100 | acpi_thermal_guess_offset(tz); |
1101 | ||
3f655ef8 ZR |
1102 | result = acpi_thermal_register_thermal_zone(tz); |
1103 | if (result) | |
1104 | goto free_memory; | |
1da177e4 | 1105 | |
a59ffb20 AL |
1106 | INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn); |
1107 | ||
766a8a6d | 1108 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
e866a2e3 | 1109 | acpi_device_bid(device), DECI_KELVIN_TO_CELSIUS(tz->temperature)); |
3f655ef8 | 1110 | goto end; |
1da177e4 | 1111 | |
3f655ef8 ZR |
1112 | free_memory: |
1113 | kfree(tz); | |
1114 | end: | |
d550d98d | 1115 | return result; |
1da177e4 LT |
1116 | } |
1117 | ||
51fac838 | 1118 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1119 | { |
4be44fcd | 1120 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1121 | |
1da177e4 | 1122 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1123 | return -EINVAL; |
1da177e4 | 1124 | |
a59ffb20 | 1125 | flush_workqueue(acpi_thermal_pm_queue); |
50dd0969 | 1126 | tz = acpi_driver_data(device); |
1da177e4 | 1127 | |
3f655ef8 | 1128 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1129 | kfree(tz); |
d550d98d | 1130 | return 0; |
1da177e4 LT |
1131 | } |
1132 | ||
90692404 | 1133 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 AL |
1134 | static int acpi_thermal_suspend(struct device *dev) |
1135 | { | |
1136 | /* Make sure the previously queued thermal check work has been done */ | |
1137 | flush_workqueue(acpi_thermal_pm_queue); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
167cffb6 | 1141 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1142 | { |
167cffb6 | 1143 | struct acpi_thermal *tz; |
b1028c54 KK |
1144 | int i, j, power_state, result; |
1145 | ||
167cffb6 | 1146 | if (!dev) |
d550d98d | 1147 | return -EINVAL; |
74ce1468 | 1148 | |
167cffb6 RW |
1149 | tz = acpi_driver_data(to_acpi_device(dev)); |
1150 | if (!tz) | |
1151 | return -EINVAL; | |
74ce1468 | 1152 | |
bed936f7 | 1153 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1154 | if (!(&tz->trips.active[i])) |
1155 | break; | |
1156 | if (!tz->trips.active[i].flags.valid) | |
1157 | break; | |
1158 | tz->trips.active[i].flags.enabled = 1; | |
1159 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1160 | result = acpi_bus_update_power( |
1161 | tz->trips.active[i].devices.handles[j], | |
1162 | &power_state); | |
b1028c54 KK |
1163 | if (result || (power_state != ACPI_STATE_D0)) { |
1164 | tz->trips.active[i].flags.enabled = 0; | |
1165 | break; | |
1166 | } | |
bed936f7 | 1167 | } |
b1028c54 | 1168 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1169 | } |
1170 | ||
a59ffb20 | 1171 | queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work); |
74ce1468 KK |
1172 | |
1173 | return AE_OK; | |
1174 | } | |
90692404 | 1175 | #endif |
74ce1468 | 1176 | |
1855256c | 1177 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1178 | |
1179 | if (act == 0) { | |
766a8a6d AS |
1180 | pr_notice(PREFIX "%s detected: " |
1181 | "disabling all active thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1182 | act = -1; |
1183 | } | |
1184 | return 0; | |
1185 | } | |
1855256c | 1186 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce | 1187 | |
766a8a6d AS |
1188 | pr_notice(PREFIX "%s detected: " |
1189 | "disabling all critical thermal trip point actions.\n", d->ident); | |
8c99fdce LB |
1190 | nocrt = 1; |
1191 | return 0; | |
1192 | } | |
1855256c | 1193 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1194 | |
1195 | if (tzp == 0) { | |
766a8a6d AS |
1196 | pr_notice(PREFIX "%s detected: " |
1197 | "enabling thermal zone polling\n", d->ident); | |
0b5bfa1c LB |
1198 | tzp = 300; /* 300 dS = 30 Seconds */ |
1199 | } | |
1200 | return 0; | |
1201 | } | |
1855256c | 1202 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1203 | |
1204 | if (psv == 0) { | |
766a8a6d AS |
1205 | pr_notice(PREFIX "%s detected: " |
1206 | "disabling all passive thermal trip points\n", d->ident); | |
0b5bfa1c LB |
1207 | psv = -1; |
1208 | } | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1213 | /* | |
1214 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1215 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1216 | */ | |
1217 | { | |
1218 | .callback = thermal_act, | |
1219 | .ident = "AOpen i915GMm-HFS", | |
1220 | .matches = { | |
1221 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1222 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1223 | }, | |
1224 | }, | |
1225 | { | |
1226 | .callback = thermal_psv, | |
1227 | .ident = "AOpen i915GMm-HFS", | |
1228 | .matches = { | |
1229 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1230 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1231 | }, | |
1232 | }, | |
1233 | { | |
1234 | .callback = thermal_tzp, | |
1235 | .ident = "AOpen i915GMm-HFS", | |
1236 | .matches = { | |
1237 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1238 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1239 | }, | |
1240 | }, | |
8c99fdce LB |
1241 | { |
1242 | .callback = thermal_nocrt, | |
1243 | .ident = "Gigabyte GA-7ZX", | |
1244 | .matches = { | |
1245 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1246 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1247 | }, | |
1248 | }, | |
0b5bfa1c LB |
1249 | {} |
1250 | }; | |
0b5bfa1c | 1251 | |
4be44fcd | 1252 | static int __init acpi_thermal_init(void) |
1da177e4 | 1253 | { |
4be44fcd | 1254 | int result = 0; |
1da177e4 | 1255 | |
0b5bfa1c LB |
1256 | dmi_check_system(thermal_dmi_table); |
1257 | ||
72b33ef8 | 1258 | if (off) { |
766a8a6d | 1259 | pr_notice(PREFIX "thermal control disabled\n"); |
72b33ef8 LB |
1260 | return -ENODEV; |
1261 | } | |
43d9f87b | 1262 | |
e053dc90 BS |
1263 | acpi_thermal_pm_queue = alloc_workqueue("acpi_thermal_pm", |
1264 | WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); | |
a59ffb20 AL |
1265 | if (!acpi_thermal_pm_queue) |
1266 | return -ENODEV; | |
1267 | ||
1da177e4 | 1268 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1269 | if (result < 0) { |
1270 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1271 | return -ENODEV; |
a59ffb20 | 1272 | } |
1da177e4 | 1273 | |
d550d98d | 1274 | return 0; |
1da177e4 LT |
1275 | } |
1276 | ||
4be44fcd | 1277 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1278 | { |
1da177e4 | 1279 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1280 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1281 | |
d550d98d | 1282 | return; |
1da177e4 LT |
1283 | } |
1284 | ||
1da177e4 LT |
1285 | module_init(acpi_thermal_init); |
1286 | module_exit(acpi_thermal_exit); |