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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 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | * | |
25 | * This driver fully implements the ACPI thermal policy as described in the | |
26 | * ACPI 2.0 Specification. | |
27 | * | |
28 | * TBD: 1. Implement passive cooling hysteresis. | |
29 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
30 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/kernel.h> | |
35 | #include <linux/module.h> | |
0b5bfa1c | 36 | #include <linux/dmi.h> |
1da177e4 | 37 | #include <linux/init.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
1da177e4 | 39 | #include <linux/types.h> |
cd354f1a | 40 | #include <linux/jiffies.h> |
1da177e4 | 41 | #include <linux/kmod.h> |
10a0a8d4 | 42 | #include <linux/reboot.h> |
f6f5c45e | 43 | #include <linux/device.h> |
3f655ef8 | 44 | #include <linux/thermal.h> |
8b48463f | 45 | #include <linux/acpi.h> |
a59ffb20 | 46 | #include <linux/workqueue.h> |
8b48463f | 47 | #include <asm/uaccess.h> |
1da177e4 | 48 | |
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 | 51 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 | 52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
1da177e4 LT |
53 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 |
54 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
55 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
56 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
57 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
58 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
59 | |
60 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
61 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
62 | ||
1da177e4 | 63 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 64 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 65 | |
1cbf4c56 | 66 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 67 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
68 | MODULE_LICENSE("GPL"); |
69 | ||
f8707ec9 LB |
70 | static int act; |
71 | module_param(act, int, 0644); | |
3c1d36da | 72 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 73 | |
c52a7419 LB |
74 | static int crt; |
75 | module_param(crt, int, 0644); | |
76 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
77 | ||
1da177e4 | 78 | static int tzp; |
730ff34d | 79 | module_param(tzp, int, 0444); |
3c1d36da | 80 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 81 | |
f5487145 LB |
82 | static int nocrt; |
83 | module_param(nocrt, int, 0); | |
8c99fdce | 84 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 85 | |
72b33ef8 LB |
86 | static int off; |
87 | module_param(off, int, 0); | |
3c1d36da | 88 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 89 | |
a70cdc52 LB |
90 | static int psv; |
91 | module_param(psv, int, 0644); | |
3c1d36da | 92 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 93 | |
a59ffb20 AL |
94 | static struct workqueue_struct *acpi_thermal_pm_queue; |
95 | ||
4be44fcd | 96 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 97 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 98 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 99 | |
1ba90e3a TR |
100 | static const struct acpi_device_id thermal_device_ids[] = { |
101 | {ACPI_THERMAL_HID, 0}, | |
102 | {"", 0}, | |
103 | }; | |
104 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
105 | ||
90692404 | 106 | #ifdef CONFIG_PM_SLEEP |
a59ffb20 | 107 | static int acpi_thermal_suspend(struct device *dev); |
167cffb6 | 108 | static int acpi_thermal_resume(struct device *dev); |
fae9e2a4 | 109 | #else |
a59ffb20 | 110 | #define acpi_thermal_suspend NULL |
fae9e2a4 | 111 | #define acpi_thermal_resume NULL |
90692404 | 112 | #endif |
a59ffb20 | 113 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume); |
167cffb6 | 114 | |
1da177e4 | 115 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 116 | .name = "thermal", |
4be44fcd | 117 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 118 | .ids = thermal_device_ids, |
4be44fcd LB |
119 | .ops = { |
120 | .add = acpi_thermal_add, | |
121 | .remove = acpi_thermal_remove, | |
342d550d | 122 | .notify = acpi_thermal_notify, |
4be44fcd | 123 | }, |
167cffb6 | 124 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
125 | }; |
126 | ||
127 | struct acpi_thermal_state { | |
4be44fcd LB |
128 | u8 critical:1; |
129 | u8 hot:1; | |
130 | u8 passive:1; | |
131 | u8 active:1; | |
132 | u8 reserved:4; | |
133 | int active_index; | |
1da177e4 LT |
134 | }; |
135 | ||
136 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
137 | u8 valid:1; |
138 | u8 enabled:1; | |
139 | u8 reserved:6; | |
1da177e4 LT |
140 | }; |
141 | ||
142 | struct acpi_thermal_critical { | |
143 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 144 | unsigned long temperature; |
1da177e4 LT |
145 | }; |
146 | ||
147 | struct acpi_thermal_hot { | |
148 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 149 | unsigned long temperature; |
1da177e4 LT |
150 | }; |
151 | ||
152 | struct acpi_thermal_passive { | |
153 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
154 | unsigned long temperature; |
155 | unsigned long tc1; | |
156 | unsigned long tc2; | |
157 | unsigned long tsp; | |
158 | struct acpi_handle_list devices; | |
1da177e4 LT |
159 | }; |
160 | ||
161 | struct acpi_thermal_active { | |
162 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
163 | unsigned long temperature; |
164 | struct acpi_handle_list devices; | |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_thermal_trips { | |
168 | struct acpi_thermal_critical critical; | |
4be44fcd | 169 | struct acpi_thermal_hot hot; |
1da177e4 LT |
170 | struct acpi_thermal_passive passive; |
171 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
172 | }; | |
173 | ||
174 | struct acpi_thermal_flags { | |
4be44fcd LB |
175 | u8 cooling_mode:1; /* _SCP */ |
176 | u8 devices:1; /* _TZD */ | |
177 | u8 reserved:6; | |
1da177e4 LT |
178 | }; |
179 | ||
180 | struct acpi_thermal { | |
8348e1b1 | 181 | struct acpi_device * device; |
4be44fcd LB |
182 | acpi_bus_id name; |
183 | unsigned long temperature; | |
184 | unsigned long last_temperature; | |
185 | unsigned long polling_frequency; | |
4be44fcd | 186 | volatile u8 zombie; |
1da177e4 LT |
187 | struct acpi_thermal_flags flags; |
188 | struct acpi_thermal_state state; | |
189 | struct acpi_thermal_trips trips; | |
4be44fcd | 190 | struct acpi_handle_list devices; |
3f655ef8 ZR |
191 | struct thermal_zone_device *thermal_zone; |
192 | int tz_enabled; | |
13614e37 | 193 | int kelvin_offset; |
a59ffb20 | 194 | struct work_struct thermal_check_work; |
1da177e4 LT |
195 | }; |
196 | ||
1da177e4 LT |
197 | /* -------------------------------------------------------------------------- |
198 | Thermal Zone Management | |
199 | -------------------------------------------------------------------------- */ | |
200 | ||
4be44fcd | 201 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 202 | { |
4be44fcd | 203 | acpi_status status = AE_OK; |
27663c58 | 204 | unsigned long long tmp; |
1da177e4 LT |
205 | |
206 | if (!tz) | |
d550d98d | 207 | return -EINVAL; |
1da177e4 LT |
208 | |
209 | tz->last_temperature = tz->temperature; | |
210 | ||
27663c58 | 211 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 212 | if (ACPI_FAILURE(status)) |
d550d98d | 213 | return -ENODEV; |
1da177e4 | 214 | |
27663c58 | 215 | tz->temperature = tmp; |
4be44fcd LB |
216 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
217 | tz->temperature)); | |
1da177e4 | 218 | |
d550d98d | 219 | return 0; |
1da177e4 LT |
220 | } |
221 | ||
4be44fcd | 222 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 223 | { |
4be44fcd | 224 | acpi_status status = AE_OK; |
27663c58 | 225 | unsigned long long tmp; |
1da177e4 LT |
226 | |
227 | if (!tz) | |
d550d98d | 228 | return -EINVAL; |
1da177e4 | 229 | |
27663c58 | 230 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 231 | if (ACPI_FAILURE(status)) |
d550d98d | 232 | return -ENODEV; |
1da177e4 | 233 | |
27663c58 | 234 | tz->polling_frequency = tmp; |
4be44fcd LB |
235 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
236 | tz->polling_frequency)); | |
1da177e4 | 237 | |
d550d98d | 238 | return 0; |
1da177e4 LT |
239 | } |
240 | ||
4be44fcd | 241 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 242 | { |
1da177e4 | 243 | if (!tz) |
d550d98d | 244 | return -EINVAL; |
1da177e4 | 245 | |
0db98202 | 246 | if (!acpi_has_method(tz->device->handle, "_SCP")) { |
1da177e4 | 247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); |
d550d98d | 248 | return -ENODEV; |
0db98202 JL |
249 | } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, |
250 | "_SCP", mode))) { | |
d550d98d | 251 | return -ENODEV; |
0db98202 | 252 | } |
1da177e4 | 253 | |
d550d98d | 254 | return 0; |
1da177e4 LT |
255 | } |
256 | ||
ce44e197 ZR |
257 | #define ACPI_TRIPS_CRITICAL 0x01 |
258 | #define ACPI_TRIPS_HOT 0x02 | |
259 | #define ACPI_TRIPS_PASSIVE 0x04 | |
260 | #define ACPI_TRIPS_ACTIVE 0x08 | |
261 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 262 | |
ce44e197 ZR |
263 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
264 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 265 | |
ce44e197 ZR |
266 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
267 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
268 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 269 | |
ce44e197 ZR |
270 | /* |
271 | * This exception is thrown out in two cases: | |
272 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
273 | * when re-evaluating the AML code. | |
274 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
275 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
276 | */ | |
277 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
278 | do { \ | |
279 | if (flags != ACPI_TRIPS_INIT) \ | |
280 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
281 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 282 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
283 | } while (0) |
284 | ||
285 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
286 | { | |
287 | acpi_status status = AE_OK; | |
27663c58 | 288 | unsigned long long tmp; |
ce44e197 ZR |
289 | struct acpi_handle_list devices; |
290 | int valid = 0; | |
291 | int i; | |
1da177e4 | 292 | |
fa809452 | 293 | /* Critical Shutdown */ |
ce44e197 ZR |
294 | if (flag & ACPI_TRIPS_CRITICAL) { |
295 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
296 | "_CRT", NULL, &tmp); |
297 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
298 | /* |
299 | * Treat freezing temperatures as invalid as well; some | |
300 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 301 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
302 | * ... so lets discard those as invalid. |
303 | */ | |
fa809452 TR |
304 | if (ACPI_FAILURE(status)) { |
305 | tz->trips.critical.flags.valid = 0; | |
306 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
307 | "No critical threshold\n")); | |
308 | } else if (tmp <= 2732) { | |
766a8a6d AS |
309 | pr_warn(FW_BUG "Invalid critical threshold (%llu)\n", |
310 | tmp); | |
c52a7419 | 311 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
312 | } else { |
313 | tz->trips.critical.flags.valid = 1; | |
314 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
315 | "Found critical threshold [%lu]\n", |
316 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
317 | } |
318 | if (tz->trips.critical.flags.valid == 1) { | |
319 | if (crt == -1) { | |
320 | tz->trips.critical.flags.valid = 0; | |
321 | } else if (crt > 0) { | |
322 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
323 | /* | |
22a94d79 | 324 | * Allow override critical threshold |
ce44e197 | 325 | */ |
22a94d79 | 326 | if (crt_k > tz->trips.critical.temperature) |
766a8a6d AS |
327 | pr_warn(PREFIX "Critical threshold %d C\n", |
328 | crt); | |
22a94d79 | 329 | tz->trips.critical.temperature = crt_k; |
ce44e197 | 330 | } |
c52a7419 LB |
331 | } |
332 | } | |
333 | ||
1da177e4 | 334 | /* Critical Sleep (optional) */ |
ce44e197 | 335 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 336 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 337 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
338 | if (ACPI_FAILURE(status)) { |
339 | tz->trips.hot.flags.valid = 0; | |
340 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
341 | "No hot threshold\n")); | |
342 | } else { | |
27663c58 | 343 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
344 | tz->trips.hot.flags.valid = 1; |
345 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
346 | "Found hot threshold [%lu]\n", | |
ee17fdf2 | 347 | tz->trips.hot.temperature)); |
ce44e197 | 348 | } |
a70cdc52 LB |
349 | } |
350 | ||
ce44e197 | 351 | /* Passive (optional) */ |
0e4240d9 ZR |
352 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
353 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
354 | valid = tz->trips.passive.flags.valid; |
355 | if (psv == -1) { | |
356 | status = AE_SUPPORT; | |
357 | } else if (psv > 0) { | |
27663c58 | 358 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
359 | status = AE_OK; |
360 | } else { | |
361 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 362 | "_PSV", NULL, &tmp); |
ce44e197 | 363 | } |
1da177e4 | 364 | |
1da177e4 LT |
365 | if (ACPI_FAILURE(status)) |
366 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 367 | else { |
27663c58 | 368 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
369 | tz->trips.passive.flags.valid = 1; |
370 | if (flag == ACPI_TRIPS_INIT) { | |
371 | status = acpi_evaluate_integer( | |
372 | tz->device->handle, "_TC1", | |
27663c58 | 373 | NULL, &tmp); |
ce44e197 ZR |
374 | if (ACPI_FAILURE(status)) |
375 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
376 | else |
377 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
378 | status = acpi_evaluate_integer( |
379 | tz->device->handle, "_TC2", | |
27663c58 | 380 | NULL, &tmp); |
ce44e197 ZR |
381 | if (ACPI_FAILURE(status)) |
382 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
383 | else |
384 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
385 | status = acpi_evaluate_integer( |
386 | tz->device->handle, "_TSP", | |
27663c58 | 387 | NULL, &tmp); |
ce44e197 ZR |
388 | if (ACPI_FAILURE(status)) |
389 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
390 | else |
391 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
392 | } |
393 | } | |
394 | } | |
395 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
396 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
397 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
398 | NULL, &devices); | |
0e4240d9 | 399 | if (ACPI_FAILURE(status)) { |
766a8a6d | 400 | pr_warn(PREFIX "Invalid passive threshold\n"); |
1da177e4 | 401 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 402 | } |
1da177e4 | 403 | else |
ce44e197 | 404 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 405 | |
ce44e197 ZR |
406 | if (memcmp(&tz->trips.passive.devices, &devices, |
407 | sizeof(struct acpi_handle_list))) { | |
408 | memcpy(&tz->trips.passive.devices, &devices, | |
409 | sizeof(struct acpi_handle_list)); | |
410 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
411 | } | |
412 | } | |
413 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
414 | if (valid != tz->trips.passive.flags.valid) | |
415 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
416 | } | |
1da177e4 | 417 | |
ce44e197 | 418 | /* Active (optional) */ |
4be44fcd | 419 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 420 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 421 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 422 | |
f8707ec9 | 423 | if (act == -1) |
ce44e197 ZR |
424 | break; /* disable all active trip points */ |
425 | ||
0e4240d9 ZR |
426 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
427 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 428 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 429 | name, NULL, &tmp); |
ce44e197 ZR |
430 | if (ACPI_FAILURE(status)) { |
431 | tz->trips.active[i].flags.valid = 0; | |
432 | if (i == 0) | |
433 | break; | |
434 | if (act <= 0) | |
435 | break; | |
436 | if (i == 1) | |
437 | tz->trips.active[0].temperature = | |
438 | CELSIUS_TO_KELVIN(act); | |
439 | else | |
440 | /* | |
441 | * Don't allow override higher than | |
442 | * the next higher trip point | |
443 | */ | |
444 | tz->trips.active[i - 1].temperature = | |
445 | (tz->trips.active[i - 2].temperature < | |
446 | CELSIUS_TO_KELVIN(act) ? | |
447 | tz->trips.active[i - 2].temperature : | |
448 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 449 | break; |
27663c58 MW |
450 | } else { |
451 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 452 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 453 | } |
f8707ec9 | 454 | } |
1da177e4 LT |
455 | |
456 | name[2] = 'L'; | |
ce44e197 ZR |
457 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
458 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
459 | status = acpi_evaluate_reference(tz->device->handle, | |
460 | name, NULL, &devices); | |
0e4240d9 | 461 | if (ACPI_FAILURE(status)) { |
766a8a6d AS |
462 | pr_warn(PREFIX "Invalid active%d threshold\n", |
463 | i); | |
ce44e197 | 464 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 465 | } |
ce44e197 ZR |
466 | else |
467 | tz->trips.active[i].flags.valid = 1; | |
468 | ||
469 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
470 | sizeof(struct acpi_handle_list))) { | |
471 | memcpy(&tz->trips.active[i].devices, &devices, | |
472 | sizeof(struct acpi_handle_list)); | |
473 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
474 | } | |
475 | } | |
476 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
477 | if (valid != tz->trips.active[i].flags.valid) | |
478 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
479 | ||
480 | if (!tz->trips.active[i].flags.valid) | |
481 | break; | |
482 | } | |
483 | ||
668e0200 LT |
484 | if ((flag & ACPI_TRIPS_DEVICES) |
485 | && acpi_has_method(tz->device->handle, "_TZD")) { | |
486 | memset(&devices, 0, sizeof(devices)); | |
ce44e197 ZR |
487 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
488 | NULL, &devices); | |
668e0200 LT |
489 | if (ACPI_SUCCESS(status) |
490 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
491 | tz->devices = devices; | |
ce44e197 ZR |
492 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
493 | } | |
1da177e4 LT |
494 | } |
495 | ||
d550d98d | 496 | return 0; |
1da177e4 LT |
497 | } |
498 | ||
ce44e197 | 499 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 500 | { |
8b7ef6d8 TR |
501 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
502 | ||
503 | if (ret) | |
504 | return ret; | |
505 | ||
506 | valid = tz->trips.critical.flags.valid | | |
507 | tz->trips.hot.flags.valid | | |
508 | tz->trips.passive.flags.valid; | |
509 | ||
510 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
511 | valid |= tz->trips.active[i].flags.valid; | |
512 | ||
513 | if (!valid) { | |
766a8a6d | 514 | pr_warn(FW_BUG "No valid trip found\n"); |
8b7ef6d8 TR |
515 | return -ENODEV; |
516 | } | |
517 | return 0; | |
1da177e4 LT |
518 | } |
519 | ||
4be44fcd | 520 | static void acpi_thermal_check(void *data) |
1da177e4 | 521 | { |
50dd0969 | 522 | struct acpi_thermal *tz = data; |
1da177e4 | 523 | |
e994d713 | 524 | if (!tz->tz_enabled) |
ca4e7130 | 525 | return; |
e994d713 | 526 | |
b1569e99 | 527 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
528 | } |
529 | ||
3f655ef8 | 530 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 531 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 532 | |
6503e5df MG |
533 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
534 | unsigned long *temp) | |
3f655ef8 ZR |
535 | { |
536 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 537 | int result; |
3f655ef8 ZR |
538 | |
539 | if (!tz) | |
540 | return -EINVAL; | |
541 | ||
76ecb4f2 ZR |
542 | result = acpi_thermal_get_temperature(tz); |
543 | if (result) | |
544 | return result; | |
545 | ||
13614e37 | 546 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 547 | return 0; |
3f655ef8 ZR |
548 | } |
549 | ||
3f655ef8 | 550 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 551 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
552 | { |
553 | struct acpi_thermal *tz = thermal->devdata; | |
554 | ||
555 | if (!tz) | |
556 | return -EINVAL; | |
557 | ||
6503e5df MG |
558 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
559 | THERMAL_DEVICE_DISABLED; | |
560 | ||
561 | return 0; | |
3f655ef8 ZR |
562 | } |
563 | ||
564 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 565 | enum thermal_device_mode mode) |
3f655ef8 ZR |
566 | { |
567 | struct acpi_thermal *tz = thermal->devdata; | |
568 | int enable; | |
569 | ||
570 | if (!tz) | |
571 | return -EINVAL; | |
572 | ||
573 | /* | |
574 | * enable/disable thermal management from ACPI thermal driver | |
575 | */ | |
6503e5df | 576 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 577 | enable = 1; |
e994d713 | 578 | else if (mode == THERMAL_DEVICE_DISABLED) { |
3f655ef8 | 579 | enable = 0; |
e994d713 SP |
580 | pr_warn("thermal zone will be disabled\n"); |
581 | } else | |
3f655ef8 ZR |
582 | return -EINVAL; |
583 | ||
584 | if (enable != tz->tz_enabled) { | |
585 | tz->tz_enabled = enable; | |
586 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
587 | "%s kernel ACPI thermal control\n", |
588 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
589 | acpi_thermal_check(tz); |
590 | } | |
591 | return 0; | |
592 | } | |
593 | ||
594 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 595 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
596 | { |
597 | struct acpi_thermal *tz = thermal->devdata; | |
598 | int i; | |
599 | ||
600 | if (!tz || trip < 0) | |
601 | return -EINVAL; | |
602 | ||
603 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
604 | if (!trip) { |
605 | *type = THERMAL_TRIP_CRITICAL; | |
606 | return 0; | |
607 | } | |
3f655ef8 ZR |
608 | trip--; |
609 | } | |
610 | ||
611 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
612 | if (!trip) { |
613 | *type = THERMAL_TRIP_HOT; | |
614 | return 0; | |
615 | } | |
3f655ef8 ZR |
616 | trip--; |
617 | } | |
618 | ||
619 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
620 | if (!trip) { |
621 | *type = THERMAL_TRIP_PASSIVE; | |
622 | return 0; | |
623 | } | |
3f655ef8 ZR |
624 | trip--; |
625 | } | |
626 | ||
627 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
628 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
629 | if (!trip) { |
630 | *type = THERMAL_TRIP_ACTIVE; | |
631 | return 0; | |
632 | } | |
3f655ef8 ZR |
633 | trip--; |
634 | } | |
635 | ||
636 | return -EINVAL; | |
637 | } | |
638 | ||
639 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
6503e5df | 640 | int trip, unsigned long *temp) |
3f655ef8 ZR |
641 | { |
642 | struct acpi_thermal *tz = thermal->devdata; | |
643 | int i; | |
644 | ||
645 | if (!tz || trip < 0) | |
646 | return -EINVAL; | |
647 | ||
648 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
649 | if (!trip) { |
650 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
651 | tz->trips.critical.temperature, |
652 | tz->kelvin_offset); | |
6503e5df MG |
653 | return 0; |
654 | } | |
3f655ef8 ZR |
655 | trip--; |
656 | } | |
657 | ||
658 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
659 | if (!trip) { |
660 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
661 | tz->trips.hot.temperature, |
662 | tz->kelvin_offset); | |
6503e5df MG |
663 | return 0; |
664 | } | |
3f655ef8 ZR |
665 | trip--; |
666 | } | |
667 | ||
668 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
669 | if (!trip) { |
670 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
671 | tz->trips.passive.temperature, |
672 | tz->kelvin_offset); | |
6503e5df MG |
673 | return 0; |
674 | } | |
3f655ef8 ZR |
675 | trip--; |
676 | } | |
677 | ||
678 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
679 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
680 | if (!trip) { |
681 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
682 | tz->trips.active[i].temperature, |
683 | tz->kelvin_offset); | |
6503e5df MG |
684 | return 0; |
685 | } | |
3f655ef8 ZR |
686 | trip--; |
687 | } | |
688 | ||
689 | return -EINVAL; | |
690 | } | |
691 | ||
9ec732ff ZR |
692 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
693 | unsigned long *temperature) { | |
694 | struct acpi_thermal *tz = thermal->devdata; | |
695 | ||
696 | if (tz->trips.critical.flags.valid) { | |
697 | *temperature = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
698 | tz->trips.critical.temperature, |
699 | tz->kelvin_offset); | |
9ec732ff ZR |
700 | return 0; |
701 | } else | |
702 | return -EINVAL; | |
703 | } | |
704 | ||
601f3d42 ZR |
705 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
706 | int trip, enum thermal_trend *trend) | |
707 | { | |
708 | struct acpi_thermal *tz = thermal->devdata; | |
709 | enum thermal_trip_type type; | |
710 | int i; | |
711 | ||
712 | if (thermal_get_trip_type(thermal, trip, &type)) | |
713 | return -EINVAL; | |
714 | ||
4ae46bef | 715 | if (type == THERMAL_TRIP_ACTIVE) { |
94a40931 ZR |
716 | unsigned long trip_temp; |
717 | unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature, | |
718 | tz->kelvin_offset); | |
719 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) | |
720 | return -EINVAL; | |
721 | ||
722 | if (temp > trip_temp) { | |
723 | *trend = THERMAL_TREND_RAISING; | |
724 | return 0; | |
725 | } else { | |
726 | /* Fall back on default trend */ | |
727 | return -EINVAL; | |
728 | } | |
4ae46bef | 729 | } |
601f3d42 ZR |
730 | |
731 | /* | |
732 | * tz->temperature has already been updated by generic thermal layer, | |
733 | * before this callback being invoked | |
734 | */ | |
735 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
736 | + (tz->trips.passive.tc2 | |
737 | * (tz->temperature - tz->trips.passive.temperature)); | |
738 | ||
739 | if (i > 0) | |
740 | *trend = THERMAL_TREND_RAISING; | |
741 | else if (i < 0) | |
742 | *trend = THERMAL_TREND_DROPPING; | |
743 | else | |
744 | *trend = THERMAL_TREND_STABLE; | |
745 | return 0; | |
746 | } | |
747 | ||
748 | ||
b1569e99 MG |
749 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
750 | enum thermal_trip_type trip_type) | |
751 | { | |
752 | u8 type = 0; | |
753 | struct acpi_thermal *tz = thermal->devdata; | |
754 | ||
755 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
756 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
757 | else if (trip_type == THERMAL_TRIP_HOT) | |
758 | type = ACPI_THERMAL_NOTIFY_HOT; | |
759 | else | |
760 | return 0; | |
761 | ||
b1569e99 | 762 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 763 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
764 | |
765 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
766 | return 1; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
3f655ef8 ZR |
771 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
772 | struct thermal_cooling_device *cdev, | |
9d99842f | 773 | bool bind) |
3f655ef8 ZR |
774 | { |
775 | struct acpi_device *device = cdev->devdata; | |
776 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
777 | struct acpi_device *dev; |
778 | acpi_status status; | |
779 | acpi_handle handle; | |
3f655ef8 ZR |
780 | int i; |
781 | int j; | |
782 | int trip = -1; | |
783 | int result = 0; | |
784 | ||
785 | if (tz->trips.critical.flags.valid) | |
786 | trip++; | |
787 | ||
788 | if (tz->trips.hot.flags.valid) | |
789 | trip++; | |
790 | ||
791 | if (tz->trips.passive.flags.valid) { | |
792 | trip++; | |
793 | for (i = 0; i < tz->trips.passive.devices.count; | |
794 | i++) { | |
653a00c9 ZR |
795 | handle = tz->trips.passive.devices.handles[i]; |
796 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
797 | if (ACPI_FAILURE(status) || dev != device) |
798 | continue; | |
799 | if (bind) | |
800 | result = | |
801 | thermal_zone_bind_cooling_device | |
802 | (thermal, trip, cdev, | |
803 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
804 | else | |
805 | result = | |
806 | thermal_zone_unbind_cooling_device | |
807 | (thermal, trip, cdev); | |
808 | if (result) | |
809 | goto failed; | |
3f655ef8 ZR |
810 | } |
811 | } | |
812 | ||
813 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
814 | if (!tz->trips.active[i].flags.valid) | |
815 | break; | |
816 | trip++; | |
817 | for (j = 0; | |
818 | j < tz->trips.active[i].devices.count; | |
819 | j++) { | |
653a00c9 ZR |
820 | handle = tz->trips.active[i].devices.handles[j]; |
821 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
822 | if (ACPI_FAILURE(status) || dev != device) |
823 | continue; | |
824 | if (bind) | |
825 | result = thermal_zone_bind_cooling_device | |
826 | (thermal, trip, cdev, | |
827 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
828 | else | |
829 | result = thermal_zone_unbind_cooling_device | |
830 | (thermal, trip, cdev); | |
831 | if (result) | |
832 | goto failed; | |
3f655ef8 ZR |
833 | } |
834 | } | |
835 | ||
836 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
837 | handle = tz->devices.handles[i]; |
838 | status = acpi_bus_get_device(handle, &dev); | |
839 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
840 | if (bind) |
841 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
842 | (thermal, THERMAL_TRIPS_NONE, |
843 | cdev, THERMAL_NO_LIMIT, | |
9d99842f ZR |
844 | THERMAL_NO_LIMIT); |
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 AS |
1108 | pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device), |
1109 | acpi_device_bid(device), 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 | |
a59ffb20 AL |
1263 | acpi_thermal_pm_queue = create_workqueue("acpi_thermal_pm"); |
1264 | if (!acpi_thermal_pm_queue) | |
1265 | return -ENODEV; | |
1266 | ||
1da177e4 | 1267 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
a59ffb20 AL |
1268 | if (result < 0) { |
1269 | destroy_workqueue(acpi_thermal_pm_queue); | |
d550d98d | 1270 | return -ENODEV; |
a59ffb20 | 1271 | } |
1da177e4 | 1272 | |
d550d98d | 1273 | return 0; |
1da177e4 LT |
1274 | } |
1275 | ||
4be44fcd | 1276 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1277 | { |
1da177e4 | 1278 | acpi_bus_unregister_driver(&acpi_thermal_driver); |
2807bd18 | 1279 | destroy_workqueue(acpi_thermal_pm_queue); |
1da177e4 | 1280 | |
d550d98d | 1281 | return; |
1da177e4 LT |
1282 | } |
1283 | ||
1da177e4 LT |
1284 | module_init(acpi_thermal_init); |
1285 | module_exit(acpi_thermal_exit); |