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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> |
1da177e4 | 44 | #include <asm/uaccess.h> |
3f655ef8 | 45 | #include <linux/thermal.h> |
1da177e4 LT |
46 | #include <acpi/acpi_bus.h> |
47 | #include <acpi/acpi_drivers.h> | |
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 | |
4be44fcd | 94 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 95 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 96 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 97 | |
1ba90e3a TR |
98 | static const struct acpi_device_id thermal_device_ids[] = { |
99 | {ACPI_THERMAL_HID, 0}, | |
100 | {"", 0}, | |
101 | }; | |
102 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
103 | ||
90692404 | 104 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 105 | static int acpi_thermal_resume(struct device *dev); |
90692404 | 106 | #endif |
167cffb6 RW |
107 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume); |
108 | ||
1da177e4 | 109 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 110 | .name = "thermal", |
4be44fcd | 111 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 112 | .ids = thermal_device_ids, |
4be44fcd LB |
113 | .ops = { |
114 | .add = acpi_thermal_add, | |
115 | .remove = acpi_thermal_remove, | |
342d550d | 116 | .notify = acpi_thermal_notify, |
4be44fcd | 117 | }, |
167cffb6 | 118 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct acpi_thermal_state { | |
4be44fcd LB |
122 | u8 critical:1; |
123 | u8 hot:1; | |
124 | u8 passive:1; | |
125 | u8 active:1; | |
126 | u8 reserved:4; | |
127 | int active_index; | |
1da177e4 LT |
128 | }; |
129 | ||
130 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
131 | u8 valid:1; |
132 | u8 enabled:1; | |
133 | u8 reserved:6; | |
1da177e4 LT |
134 | }; |
135 | ||
136 | struct acpi_thermal_critical { | |
137 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 138 | unsigned long temperature; |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_thermal_hot { | |
142 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 143 | unsigned long temperature; |
1da177e4 LT |
144 | }; |
145 | ||
146 | struct acpi_thermal_passive { | |
147 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
148 | unsigned long temperature; |
149 | unsigned long tc1; | |
150 | unsigned long tc2; | |
151 | unsigned long tsp; | |
152 | struct acpi_handle_list devices; | |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct acpi_thermal_active { | |
156 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
157 | unsigned long temperature; |
158 | struct acpi_handle_list devices; | |
1da177e4 LT |
159 | }; |
160 | ||
161 | struct acpi_thermal_trips { | |
162 | struct acpi_thermal_critical critical; | |
4be44fcd | 163 | struct acpi_thermal_hot hot; |
1da177e4 LT |
164 | struct acpi_thermal_passive passive; |
165 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
166 | }; | |
167 | ||
168 | struct acpi_thermal_flags { | |
4be44fcd LB |
169 | u8 cooling_mode:1; /* _SCP */ |
170 | u8 devices:1; /* _TZD */ | |
171 | u8 reserved:6; | |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_thermal { | |
8348e1b1 | 175 | struct acpi_device * device; |
4be44fcd LB |
176 | acpi_bus_id name; |
177 | unsigned long temperature; | |
178 | unsigned long last_temperature; | |
179 | unsigned long polling_frequency; | |
4be44fcd | 180 | volatile u8 zombie; |
1da177e4 LT |
181 | struct acpi_thermal_flags flags; |
182 | struct acpi_thermal_state state; | |
183 | struct acpi_thermal_trips trips; | |
4be44fcd | 184 | struct acpi_handle_list devices; |
3f655ef8 ZR |
185 | struct thermal_zone_device *thermal_zone; |
186 | int tz_enabled; | |
13614e37 | 187 | int kelvin_offset; |
1da177e4 LT |
188 | }; |
189 | ||
1da177e4 LT |
190 | /* -------------------------------------------------------------------------- |
191 | Thermal Zone Management | |
192 | -------------------------------------------------------------------------- */ | |
193 | ||
4be44fcd | 194 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 195 | { |
4be44fcd | 196 | acpi_status status = AE_OK; |
27663c58 | 197 | unsigned long long tmp; |
1da177e4 LT |
198 | |
199 | if (!tz) | |
d550d98d | 200 | return -EINVAL; |
1da177e4 LT |
201 | |
202 | tz->last_temperature = tz->temperature; | |
203 | ||
27663c58 | 204 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 205 | if (ACPI_FAILURE(status)) |
d550d98d | 206 | return -ENODEV; |
1da177e4 | 207 | |
27663c58 | 208 | tz->temperature = tmp; |
4be44fcd LB |
209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
210 | tz->temperature)); | |
1da177e4 | 211 | |
d550d98d | 212 | return 0; |
1da177e4 LT |
213 | } |
214 | ||
4be44fcd | 215 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 216 | { |
4be44fcd | 217 | acpi_status status = AE_OK; |
27663c58 | 218 | unsigned long long tmp; |
1da177e4 LT |
219 | |
220 | if (!tz) | |
d550d98d | 221 | return -EINVAL; |
1da177e4 | 222 | |
27663c58 | 223 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 224 | if (ACPI_FAILURE(status)) |
d550d98d | 225 | return -ENODEV; |
1da177e4 | 226 | |
27663c58 | 227 | tz->polling_frequency = tmp; |
4be44fcd LB |
228 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
229 | tz->polling_frequency)); | |
1da177e4 | 230 | |
d550d98d | 231 | return 0; |
1da177e4 LT |
232 | } |
233 | ||
4be44fcd | 234 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 235 | { |
1da177e4 | 236 | if (!tz) |
d550d98d | 237 | return -EINVAL; |
1da177e4 | 238 | |
0db98202 | 239 | if (!acpi_has_method(tz->device->handle, "_SCP")) { |
1da177e4 | 240 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); |
d550d98d | 241 | return -ENODEV; |
0db98202 JL |
242 | } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle, |
243 | "_SCP", mode))) { | |
d550d98d | 244 | return -ENODEV; |
0db98202 | 245 | } |
1da177e4 | 246 | |
d550d98d | 247 | return 0; |
1da177e4 LT |
248 | } |
249 | ||
ce44e197 ZR |
250 | #define ACPI_TRIPS_CRITICAL 0x01 |
251 | #define ACPI_TRIPS_HOT 0x02 | |
252 | #define ACPI_TRIPS_PASSIVE 0x04 | |
253 | #define ACPI_TRIPS_ACTIVE 0x08 | |
254 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 255 | |
ce44e197 ZR |
256 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
257 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 258 | |
ce44e197 ZR |
259 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
260 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
261 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 262 | |
ce44e197 ZR |
263 | /* |
264 | * This exception is thrown out in two cases: | |
265 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
266 | * when re-evaluating the AML code. | |
267 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
268 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
269 | */ | |
270 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
271 | do { \ | |
272 | if (flags != ACPI_TRIPS_INIT) \ | |
273 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
274 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 275 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
276 | } while (0) |
277 | ||
278 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
279 | { | |
280 | acpi_status status = AE_OK; | |
27663c58 | 281 | unsigned long long tmp; |
ce44e197 ZR |
282 | struct acpi_handle_list devices; |
283 | int valid = 0; | |
284 | int i; | |
1da177e4 | 285 | |
fa809452 | 286 | /* Critical Shutdown */ |
ce44e197 ZR |
287 | if (flag & ACPI_TRIPS_CRITICAL) { |
288 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
289 | "_CRT", NULL, &tmp); |
290 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
291 | /* |
292 | * Treat freezing temperatures as invalid as well; some | |
293 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 294 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
295 | * ... so lets discard those as invalid. |
296 | */ | |
fa809452 TR |
297 | if (ACPI_FAILURE(status)) { |
298 | tz->trips.critical.flags.valid = 0; | |
299 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
300 | "No critical threshold\n")); | |
301 | } else if (tmp <= 2732) { | |
302 | printk(KERN_WARNING FW_BUG "Invalid critical threshold " | |
303 | "(%llu)\n", tmp); | |
c52a7419 | 304 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
305 | } else { |
306 | tz->trips.critical.flags.valid = 1; | |
307 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
308 | "Found critical threshold [%lu]\n", |
309 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
310 | } |
311 | if (tz->trips.critical.flags.valid == 1) { | |
312 | if (crt == -1) { | |
313 | tz->trips.critical.flags.valid = 0; | |
314 | } else if (crt > 0) { | |
315 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
316 | /* | |
22a94d79 | 317 | * Allow override critical threshold |
ce44e197 | 318 | */ |
22a94d79 ZR |
319 | if (crt_k > tz->trips.critical.temperature) |
320 | printk(KERN_WARNING PREFIX | |
321 | "Critical threshold %d C\n", crt); | |
322 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 323 | } |
c52a7419 LB |
324 | } |
325 | } | |
326 | ||
1da177e4 | 327 | /* Critical Sleep (optional) */ |
ce44e197 | 328 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 329 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 330 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
331 | if (ACPI_FAILURE(status)) { |
332 | tz->trips.hot.flags.valid = 0; | |
333 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
334 | "No hot threshold\n")); | |
335 | } else { | |
27663c58 | 336 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
337 | tz->trips.hot.flags.valid = 1; |
338 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
339 | "Found hot threshold [%lu]\n", | |
340 | tz->trips.critical.temperature)); | |
341 | } | |
a70cdc52 LB |
342 | } |
343 | ||
ce44e197 | 344 | /* Passive (optional) */ |
0e4240d9 ZR |
345 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
346 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
347 | valid = tz->trips.passive.flags.valid; |
348 | if (psv == -1) { | |
349 | status = AE_SUPPORT; | |
350 | } else if (psv > 0) { | |
27663c58 | 351 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
352 | status = AE_OK; |
353 | } else { | |
354 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 355 | "_PSV", NULL, &tmp); |
ce44e197 | 356 | } |
1da177e4 | 357 | |
1da177e4 LT |
358 | if (ACPI_FAILURE(status)) |
359 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 360 | else { |
27663c58 | 361 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
362 | tz->trips.passive.flags.valid = 1; |
363 | if (flag == ACPI_TRIPS_INIT) { | |
364 | status = acpi_evaluate_integer( | |
365 | tz->device->handle, "_TC1", | |
27663c58 | 366 | NULL, &tmp); |
ce44e197 ZR |
367 | if (ACPI_FAILURE(status)) |
368 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
369 | else |
370 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
371 | status = acpi_evaluate_integer( |
372 | tz->device->handle, "_TC2", | |
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.tc2 = tmp; | |
ce44e197 ZR |
378 | status = acpi_evaluate_integer( |
379 | tz->device->handle, "_TSP", | |
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.tsp = tmp; | |
ce44e197 ZR |
385 | } |
386 | } | |
387 | } | |
388 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
389 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
390 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
391 | NULL, &devices); | |
0e4240d9 ZR |
392 | if (ACPI_FAILURE(status)) { |
393 | printk(KERN_WARNING PREFIX | |
394 | "Invalid passive threshold\n"); | |
1da177e4 | 395 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 396 | } |
1da177e4 | 397 | else |
ce44e197 | 398 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 399 | |
ce44e197 ZR |
400 | if (memcmp(&tz->trips.passive.devices, &devices, |
401 | sizeof(struct acpi_handle_list))) { | |
402 | memcpy(&tz->trips.passive.devices, &devices, | |
403 | sizeof(struct acpi_handle_list)); | |
404 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
405 | } | |
406 | } | |
407 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
408 | if (valid != tz->trips.passive.flags.valid) | |
409 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
410 | } | |
1da177e4 | 411 | |
ce44e197 | 412 | /* Active (optional) */ |
4be44fcd | 413 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 414 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 415 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 416 | |
f8707ec9 | 417 | if (act == -1) |
ce44e197 ZR |
418 | break; /* disable all active trip points */ |
419 | ||
0e4240d9 ZR |
420 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
421 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 422 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 423 | name, NULL, &tmp); |
ce44e197 ZR |
424 | if (ACPI_FAILURE(status)) { |
425 | tz->trips.active[i].flags.valid = 0; | |
426 | if (i == 0) | |
427 | break; | |
428 | if (act <= 0) | |
429 | break; | |
430 | if (i == 1) | |
431 | tz->trips.active[0].temperature = | |
432 | CELSIUS_TO_KELVIN(act); | |
433 | else | |
434 | /* | |
435 | * Don't allow override higher than | |
436 | * the next higher trip point | |
437 | */ | |
438 | tz->trips.active[i - 1].temperature = | |
439 | (tz->trips.active[i - 2].temperature < | |
440 | CELSIUS_TO_KELVIN(act) ? | |
441 | tz->trips.active[i - 2].temperature : | |
442 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 443 | break; |
27663c58 MW |
444 | } else { |
445 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 446 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 447 | } |
f8707ec9 | 448 | } |
1da177e4 LT |
449 | |
450 | name[2] = 'L'; | |
ce44e197 ZR |
451 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
452 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
453 | status = acpi_evaluate_reference(tz->device->handle, | |
454 | name, NULL, &devices); | |
0e4240d9 ZR |
455 | if (ACPI_FAILURE(status)) { |
456 | printk(KERN_WARNING PREFIX | |
457 | "Invalid active%d threshold\n", i); | |
ce44e197 | 458 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 459 | } |
ce44e197 ZR |
460 | else |
461 | tz->trips.active[i].flags.valid = 1; | |
462 | ||
463 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
464 | sizeof(struct acpi_handle_list))) { | |
465 | memcpy(&tz->trips.active[i].devices, &devices, | |
466 | sizeof(struct acpi_handle_list)); | |
467 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
468 | } | |
469 | } | |
470 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
471 | if (valid != tz->trips.active[i].flags.valid) | |
472 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
473 | ||
474 | if (!tz->trips.active[i].flags.valid) | |
475 | break; | |
476 | } | |
477 | ||
668e0200 LT |
478 | if ((flag & ACPI_TRIPS_DEVICES) |
479 | && acpi_has_method(tz->device->handle, "_TZD")) { | |
480 | memset(&devices, 0, sizeof(devices)); | |
ce44e197 ZR |
481 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", |
482 | NULL, &devices); | |
668e0200 LT |
483 | if (ACPI_SUCCESS(status) |
484 | && memcmp(&tz->devices, &devices, sizeof(devices))) { | |
485 | tz->devices = devices; | |
ce44e197 ZR |
486 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); |
487 | } | |
1da177e4 LT |
488 | } |
489 | ||
d550d98d | 490 | return 0; |
1da177e4 LT |
491 | } |
492 | ||
ce44e197 | 493 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 494 | { |
8b7ef6d8 TR |
495 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
496 | ||
497 | if (ret) | |
498 | return ret; | |
499 | ||
500 | valid = tz->trips.critical.flags.valid | | |
501 | tz->trips.hot.flags.valid | | |
502 | tz->trips.passive.flags.valid; | |
503 | ||
504 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
505 | valid |= tz->trips.active[i].flags.valid; | |
506 | ||
507 | if (!valid) { | |
508 | printk(KERN_WARNING FW_BUG "No valid trip found\n"); | |
509 | return -ENODEV; | |
510 | } | |
511 | return 0; | |
1da177e4 LT |
512 | } |
513 | ||
4be44fcd | 514 | static void acpi_thermal_check(void *data) |
1da177e4 | 515 | { |
50dd0969 | 516 | struct acpi_thermal *tz = data; |
1da177e4 | 517 | |
ca4e7130 SP |
518 | if (!tz->tz_enabled) { |
519 | pr_warn("thermal zone is disabled \n"); | |
520 | return; | |
521 | } | |
b1569e99 | 522 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
523 | } |
524 | ||
3f655ef8 | 525 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 526 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 527 | |
6503e5df MG |
528 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
529 | unsigned long *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 | ||
13614e37 | 541 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 542 | return 0; |
3f655ef8 ZR |
543 | } |
544 | ||
3f655ef8 | 545 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 546 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
547 | { |
548 | struct acpi_thermal *tz = thermal->devdata; | |
549 | ||
550 | if (!tz) | |
551 | return -EINVAL; | |
552 | ||
6503e5df MG |
553 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
554 | THERMAL_DEVICE_DISABLED; | |
555 | ||
556 | return 0; | |
3f655ef8 ZR |
557 | } |
558 | ||
559 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 560 | enum thermal_device_mode mode) |
3f655ef8 ZR |
561 | { |
562 | struct acpi_thermal *tz = thermal->devdata; | |
563 | int enable; | |
564 | ||
565 | if (!tz) | |
566 | return -EINVAL; | |
567 | ||
568 | /* | |
569 | * enable/disable thermal management from ACPI thermal driver | |
570 | */ | |
6503e5df | 571 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 572 | enable = 1; |
6503e5df | 573 | else if (mode == THERMAL_DEVICE_DISABLED) |
3f655ef8 ZR |
574 | enable = 0; |
575 | else | |
576 | return -EINVAL; | |
577 | ||
578 | if (enable != tz->tz_enabled) { | |
579 | tz->tz_enabled = enable; | |
580 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
581 | "%s kernel ACPI thermal control\n", |
582 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
583 | acpi_thermal_check(tz); |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 589 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
590 | { |
591 | struct acpi_thermal *tz = thermal->devdata; | |
592 | int i; | |
593 | ||
594 | if (!tz || trip < 0) | |
595 | return -EINVAL; | |
596 | ||
597 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
598 | if (!trip) { |
599 | *type = THERMAL_TRIP_CRITICAL; | |
600 | return 0; | |
601 | } | |
3f655ef8 ZR |
602 | trip--; |
603 | } | |
604 | ||
605 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
606 | if (!trip) { |
607 | *type = THERMAL_TRIP_HOT; | |
608 | return 0; | |
609 | } | |
3f655ef8 ZR |
610 | trip--; |
611 | } | |
612 | ||
613 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
614 | if (!trip) { |
615 | *type = THERMAL_TRIP_PASSIVE; | |
616 | return 0; | |
617 | } | |
3f655ef8 ZR |
618 | trip--; |
619 | } | |
620 | ||
621 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
622 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
623 | if (!trip) { |
624 | *type = THERMAL_TRIP_ACTIVE; | |
625 | return 0; | |
626 | } | |
3f655ef8 ZR |
627 | trip--; |
628 | } | |
629 | ||
630 | return -EINVAL; | |
631 | } | |
632 | ||
633 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
6503e5df | 634 | int trip, unsigned long *temp) |
3f655ef8 ZR |
635 | { |
636 | struct acpi_thermal *tz = thermal->devdata; | |
637 | int i; | |
638 | ||
639 | if (!tz || trip < 0) | |
640 | return -EINVAL; | |
641 | ||
642 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
643 | if (!trip) { |
644 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
645 | tz->trips.critical.temperature, |
646 | tz->kelvin_offset); | |
6503e5df MG |
647 | return 0; |
648 | } | |
3f655ef8 ZR |
649 | trip--; |
650 | } | |
651 | ||
652 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
653 | if (!trip) { |
654 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
655 | tz->trips.hot.temperature, |
656 | tz->kelvin_offset); | |
6503e5df MG |
657 | return 0; |
658 | } | |
3f655ef8 ZR |
659 | trip--; |
660 | } | |
661 | ||
662 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
663 | if (!trip) { |
664 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
665 | tz->trips.passive.temperature, |
666 | tz->kelvin_offset); | |
6503e5df MG |
667 | return 0; |
668 | } | |
3f655ef8 ZR |
669 | trip--; |
670 | } | |
671 | ||
672 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
673 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
674 | if (!trip) { |
675 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
676 | tz->trips.active[i].temperature, |
677 | tz->kelvin_offset); | |
6503e5df MG |
678 | return 0; |
679 | } | |
3f655ef8 ZR |
680 | trip--; |
681 | } | |
682 | ||
683 | return -EINVAL; | |
684 | } | |
685 | ||
9ec732ff ZR |
686 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
687 | unsigned long *temperature) { | |
688 | struct acpi_thermal *tz = thermal->devdata; | |
689 | ||
690 | if (tz->trips.critical.flags.valid) { | |
691 | *temperature = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
692 | tz->trips.critical.temperature, |
693 | tz->kelvin_offset); | |
9ec732ff ZR |
694 | return 0; |
695 | } else | |
696 | return -EINVAL; | |
697 | } | |
698 | ||
601f3d42 ZR |
699 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
700 | int trip, enum thermal_trend *trend) | |
701 | { | |
702 | struct acpi_thermal *tz = thermal->devdata; | |
703 | enum thermal_trip_type type; | |
704 | int i; | |
705 | ||
706 | if (thermal_get_trip_type(thermal, trip, &type)) | |
707 | return -EINVAL; | |
708 | ||
4ae46bef | 709 | if (type == THERMAL_TRIP_ACTIVE) { |
94a40931 ZR |
710 | unsigned long trip_temp; |
711 | unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature, | |
712 | tz->kelvin_offset); | |
713 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) | |
714 | return -EINVAL; | |
715 | ||
716 | if (temp > trip_temp) { | |
717 | *trend = THERMAL_TREND_RAISING; | |
718 | return 0; | |
719 | } else { | |
720 | /* Fall back on default trend */ | |
721 | return -EINVAL; | |
722 | } | |
4ae46bef | 723 | } |
601f3d42 ZR |
724 | |
725 | /* | |
726 | * tz->temperature has already been updated by generic thermal layer, | |
727 | * before this callback being invoked | |
728 | */ | |
729 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
730 | + (tz->trips.passive.tc2 | |
731 | * (tz->temperature - tz->trips.passive.temperature)); | |
732 | ||
733 | if (i > 0) | |
734 | *trend = THERMAL_TREND_RAISING; | |
735 | else if (i < 0) | |
736 | *trend = THERMAL_TREND_DROPPING; | |
737 | else | |
738 | *trend = THERMAL_TREND_STABLE; | |
739 | return 0; | |
740 | } | |
741 | ||
742 | ||
b1569e99 MG |
743 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
744 | enum thermal_trip_type trip_type) | |
745 | { | |
746 | u8 type = 0; | |
747 | struct acpi_thermal *tz = thermal->devdata; | |
748 | ||
749 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
750 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
751 | else if (trip_type == THERMAL_TRIP_HOT) | |
752 | type = ACPI_THERMAL_NOTIFY_HOT; | |
753 | else | |
754 | return 0; | |
755 | ||
b1569e99 | 756 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
f6f5c45e | 757 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
758 | |
759 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
760 | return 1; | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
3f655ef8 ZR |
765 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
766 | struct thermal_cooling_device *cdev, | |
9d99842f | 767 | bool bind) |
3f655ef8 ZR |
768 | { |
769 | struct acpi_device *device = cdev->devdata; | |
770 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
771 | struct acpi_device *dev; |
772 | acpi_status status; | |
773 | acpi_handle handle; | |
3f655ef8 ZR |
774 | int i; |
775 | int j; | |
776 | int trip = -1; | |
777 | int result = 0; | |
778 | ||
779 | if (tz->trips.critical.flags.valid) | |
780 | trip++; | |
781 | ||
782 | if (tz->trips.hot.flags.valid) | |
783 | trip++; | |
784 | ||
785 | if (tz->trips.passive.flags.valid) { | |
786 | trip++; | |
787 | for (i = 0; i < tz->trips.passive.devices.count; | |
788 | i++) { | |
653a00c9 ZR |
789 | handle = tz->trips.passive.devices.handles[i]; |
790 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
791 | if (ACPI_FAILURE(status) || dev != device) |
792 | continue; | |
793 | if (bind) | |
794 | result = | |
795 | thermal_zone_bind_cooling_device | |
796 | (thermal, trip, cdev, | |
797 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
798 | else | |
799 | result = | |
800 | thermal_zone_unbind_cooling_device | |
801 | (thermal, trip, cdev); | |
802 | if (result) | |
803 | goto failed; | |
3f655ef8 ZR |
804 | } |
805 | } | |
806 | ||
807 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
808 | if (!tz->trips.active[i].flags.valid) | |
809 | break; | |
810 | trip++; | |
811 | for (j = 0; | |
812 | j < tz->trips.active[i].devices.count; | |
813 | j++) { | |
653a00c9 ZR |
814 | handle = tz->trips.active[i].devices.handles[j]; |
815 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
816 | if (ACPI_FAILURE(status) || dev != device) |
817 | continue; | |
818 | if (bind) | |
819 | result = thermal_zone_bind_cooling_device | |
820 | (thermal, trip, cdev, | |
821 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
822 | else | |
823 | result = thermal_zone_unbind_cooling_device | |
824 | (thermal, trip, cdev); | |
825 | if (result) | |
826 | goto failed; | |
3f655ef8 ZR |
827 | } |
828 | } | |
829 | ||
830 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
831 | handle = tz->devices.handles[i]; |
832 | status = acpi_bus_get_device(handle, &dev); | |
833 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
834 | if (bind) |
835 | result = thermal_zone_bind_cooling_device | |
70f2903b LT |
836 | (thermal, THERMAL_TRIPS_NONE, |
837 | cdev, THERMAL_NO_LIMIT, | |
9d99842f ZR |
838 | THERMAL_NO_LIMIT); |
839 | else | |
840 | result = thermal_zone_unbind_cooling_device | |
70f2903b LT |
841 | (thermal, THERMAL_TRIPS_NONE, |
842 | cdev); | |
653a00c9 ZR |
843 | if (result) |
844 | goto failed; | |
845 | } | |
3f655ef8 ZR |
846 | } |
847 | ||
848 | failed: | |
849 | return result; | |
850 | } | |
851 | ||
852 | static int | |
853 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
854 | struct thermal_cooling_device *cdev) | |
855 | { | |
9d99842f | 856 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
857 | } |
858 | ||
859 | static int | |
860 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
861 | struct thermal_cooling_device *cdev) | |
862 | { | |
9d99842f | 863 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
864 | } |
865 | ||
9c8b04be | 866 | static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
867 | .bind = acpi_thermal_bind_cooling_device, |
868 | .unbind = acpi_thermal_unbind_cooling_device, | |
869 | .get_temp = thermal_get_temp, | |
870 | .get_mode = thermal_get_mode, | |
871 | .set_mode = thermal_set_mode, | |
872 | .get_trip_type = thermal_get_trip_type, | |
873 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 874 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 875 | .get_trend = thermal_get_trend, |
b1569e99 | 876 | .notify = thermal_notify, |
3f655ef8 ZR |
877 | }; |
878 | ||
879 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
880 | { | |
881 | int trips = 0; | |
882 | int result; | |
20733939 | 883 | acpi_status status; |
3f655ef8 ZR |
884 | int i; |
885 | ||
886 | if (tz->trips.critical.flags.valid) | |
887 | trips++; | |
888 | ||
889 | if (tz->trips.hot.flags.valid) | |
890 | trips++; | |
891 | ||
892 | if (tz->trips.passive.flags.valid) | |
893 | trips++; | |
894 | ||
895 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
896 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
897 | |
898 | if (tz->trips.passive.flags.valid) | |
899 | tz->thermal_zone = | |
c56f5c03 | 900 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 901 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
902 | tz->trips.passive.tsp*100, |
903 | tz->polling_frequency*100); | |
904 | else | |
905 | tz->thermal_zone = | |
c56f5c03 | 906 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
907 | &acpi_thermal_zone_ops, NULL, |
908 | 0, tz->polling_frequency*100); | |
bb070e43 | 909 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
910 | return -ENODEV; |
911 | ||
912 | result = sysfs_create_link(&tz->device->dev.kobj, | |
913 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
914 | if (result) | |
915 | return result; | |
916 | ||
917 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
918 | &tz->device->dev.kobj, "device"); | |
919 | if (result) | |
920 | return result; | |
921 | ||
20733939 ZR |
922 | status = acpi_attach_data(tz->device->handle, |
923 | acpi_bus_private_data_handler, | |
924 | tz->thermal_zone); | |
925 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
926 | printk(KERN_ERR PREFIX |
927 | "Error attaching device data\n"); | |
20733939 ZR |
928 | return -ENODEV; |
929 | } | |
930 | ||
3f655ef8 ZR |
931 | tz->tz_enabled = 1; |
932 | ||
fc3a8828 GKH |
933 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
934 | tz->thermal_zone->id); | |
3f655ef8 ZR |
935 | return 0; |
936 | } | |
937 | ||
938 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
939 | { | |
940 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
941 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
942 | thermal_zone_device_unregister(tz->thermal_zone); | |
943 | tz->thermal_zone = NULL; | |
20733939 | 944 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
945 | } |
946 | ||
947 | ||
1da177e4 LT |
948 | /* -------------------------------------------------------------------------- |
949 | Driver Interface | |
950 | -------------------------------------------------------------------------- */ | |
951 | ||
342d550d | 952 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 953 | { |
342d550d | 954 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 955 | |
1da177e4 LT |
956 | |
957 | if (!tz) | |
d550d98d | 958 | return; |
1da177e4 | 959 | |
1da177e4 LT |
960 | switch (event) { |
961 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
962 | acpi_thermal_check(tz); | |
963 | break; | |
964 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 965 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 966 | acpi_thermal_check(tz); |
962ce8ca | 967 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 968 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
969 | break; |
970 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
971 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
972 | acpi_thermal_check(tz); | |
962ce8ca | 973 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 974 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
975 | break; |
976 | default: | |
977 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 978 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
979 | break; |
980 | } | |
1da177e4 LT |
981 | } |
982 | ||
261cba2d ZR |
983 | /* |
984 | * On some platforms, the AML code has dependency about | |
985 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
986 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
987 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
988 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
989 | * if _TMP has never been evaluated. | |
990 | * | |
991 | * As this dependency is totally transparent to OS, evaluate | |
992 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
993 | * _TMP, before they are actually used. | |
994 | */ | |
995 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
996 | { | |
997 | acpi_handle handle = tz->device->handle; | |
998 | unsigned long long value; | |
999 | int i; | |
1000 | ||
1001 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
1002 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
1003 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
1004 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1005 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
1006 | acpi_status status; | |
1007 | ||
1008 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
1009 | if (status == AE_NOT_FOUND) | |
1010 | break; | |
1011 | } | |
1012 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
1013 | } | |
1014 | ||
4be44fcd | 1015 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1016 | { |
4be44fcd | 1017 | int result = 0; |
1da177e4 | 1018 | |
1da177e4 LT |
1019 | |
1020 | if (!tz) | |
d550d98d | 1021 | return -EINVAL; |
1da177e4 | 1022 | |
261cba2d ZR |
1023 | acpi_thermal_aml_dependency_fix(tz); |
1024 | ||
9bcb8118 MG |
1025 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1026 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1027 | if (result) |
d550d98d | 1028 | return result; |
1da177e4 | 1029 | |
9bcb8118 MG |
1030 | /* Get temperature [_TMP] (required) */ |
1031 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1032 | if (result) |
d550d98d | 1033 | return result; |
1da177e4 LT |
1034 | |
1035 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1036 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1037 | if (!result) |
1da177e4 | 1038 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1039 | |
1040 | /* Get default polling frequency [_TZP] (optional) */ | |
1041 | if (tzp) | |
1042 | tz->polling_frequency = tzp; | |
1043 | else | |
1044 | acpi_thermal_get_polling_frequency(tz); | |
1045 | ||
d550d98d | 1046 | return 0; |
1da177e4 LT |
1047 | } |
1048 | ||
13614e37 JD |
1049 | /* |
1050 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1051 | * handles temperature values with a single decimal place. As a consequence, | |
1052 | * some implementations use an offset of 273.1 and others use an offset of | |
1053 | * 273.2. Try to find out which one is being used, to present the most | |
1054 | * accurate and visually appealing number. | |
1055 | * | |
1056 | * The heuristic below should work for all ACPI thermal zones which have a | |
1057 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1058 | */ | |
1059 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1060 | { | |
1061 | if (tz->trips.critical.flags.valid && | |
1062 | (tz->trips.critical.temperature % 5) == 1) | |
1063 | tz->kelvin_offset = 2731; | |
1064 | else | |
1065 | tz->kelvin_offset = 2732; | |
1066 | } | |
1067 | ||
4be44fcd | 1068 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1069 | { |
4be44fcd | 1070 | int result = 0; |
4be44fcd | 1071 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | |
1074 | if (!device) | |
d550d98d | 1075 | return -EINVAL; |
1da177e4 | 1076 | |
36bcbec7 | 1077 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1078 | if (!tz) |
d550d98d | 1079 | return -ENOMEM; |
1da177e4 | 1080 | |
8348e1b1 | 1081 | tz->device = device; |
1da177e4 LT |
1082 | strcpy(tz->name, device->pnp.bus_id); |
1083 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1084 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1085 | device->driver_data = tz; |
3f655ef8 | 1086 | |
1da177e4 LT |
1087 | result = acpi_thermal_get_info(tz); |
1088 | if (result) | |
3f655ef8 ZR |
1089 | goto free_memory; |
1090 | ||
13614e37 JD |
1091 | acpi_thermal_guess_offset(tz); |
1092 | ||
3f655ef8 ZR |
1093 | result = acpi_thermal_register_thermal_zone(tz); |
1094 | if (result) | |
1095 | goto free_memory; | |
1da177e4 | 1096 | |
1da177e4 | 1097 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", |
4be44fcd LB |
1098 | acpi_device_name(device), acpi_device_bid(device), |
1099 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1100 | goto end; |
1da177e4 | 1101 | |
3f655ef8 ZR |
1102 | free_memory: |
1103 | kfree(tz); | |
1104 | end: | |
d550d98d | 1105 | return result; |
1da177e4 LT |
1106 | } |
1107 | ||
51fac838 | 1108 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1109 | { |
4be44fcd | 1110 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1111 | |
1da177e4 | 1112 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1113 | return -EINVAL; |
1da177e4 | 1114 | |
50dd0969 | 1115 | tz = acpi_driver_data(device); |
1da177e4 | 1116 | |
3f655ef8 | 1117 | acpi_thermal_unregister_thermal_zone(tz); |
1da177e4 | 1118 | kfree(tz); |
d550d98d | 1119 | return 0; |
1da177e4 LT |
1120 | } |
1121 | ||
90692404 | 1122 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 1123 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1124 | { |
167cffb6 | 1125 | struct acpi_thermal *tz; |
b1028c54 KK |
1126 | int i, j, power_state, result; |
1127 | ||
167cffb6 | 1128 | if (!dev) |
d550d98d | 1129 | return -EINVAL; |
74ce1468 | 1130 | |
167cffb6 RW |
1131 | tz = acpi_driver_data(to_acpi_device(dev)); |
1132 | if (!tz) | |
1133 | return -EINVAL; | |
74ce1468 | 1134 | |
bed936f7 | 1135 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1136 | if (!(&tz->trips.active[i])) |
1137 | break; | |
1138 | if (!tz->trips.active[i].flags.valid) | |
1139 | break; | |
1140 | tz->trips.active[i].flags.enabled = 1; | |
1141 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1142 | result = acpi_bus_update_power( |
1143 | tz->trips.active[i].devices.handles[j], | |
1144 | &power_state); | |
b1028c54 KK |
1145 | if (result || (power_state != ACPI_STATE_D0)) { |
1146 | tz->trips.active[i].flags.enabled = 0; | |
1147 | break; | |
1148 | } | |
bed936f7 | 1149 | } |
b1028c54 | 1150 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1151 | } |
1152 | ||
b1028c54 | 1153 | acpi_thermal_check(tz); |
74ce1468 KK |
1154 | |
1155 | return AE_OK; | |
1156 | } | |
90692404 | 1157 | #endif |
74ce1468 | 1158 | |
1855256c | 1159 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1160 | |
1161 | if (act == 0) { | |
1162 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1163 | "disabling all active thermal trip points\n", d->ident); | |
1164 | act = -1; | |
1165 | } | |
1166 | return 0; | |
1167 | } | |
1855256c | 1168 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1169 | |
1170 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1171 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1172 | nocrt = 1; | |
1173 | return 0; | |
1174 | } | |
1855256c | 1175 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1176 | |
1177 | if (tzp == 0) { | |
1178 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1179 | "enabling thermal zone polling\n", d->ident); | |
1180 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1181 | } | |
1182 | return 0; | |
1183 | } | |
1855256c | 1184 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1185 | |
1186 | if (psv == 0) { | |
1187 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1188 | "disabling all passive thermal trip points\n", d->ident); | |
1189 | psv = -1; | |
1190 | } | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1195 | /* | |
1196 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1197 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1198 | */ | |
1199 | { | |
1200 | .callback = thermal_act, | |
1201 | .ident = "AOpen i915GMm-HFS", | |
1202 | .matches = { | |
1203 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1204 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1205 | }, | |
1206 | }, | |
1207 | { | |
1208 | .callback = thermal_psv, | |
1209 | .ident = "AOpen i915GMm-HFS", | |
1210 | .matches = { | |
1211 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1212 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1213 | }, | |
1214 | }, | |
1215 | { | |
1216 | .callback = thermal_tzp, | |
1217 | .ident = "AOpen i915GMm-HFS", | |
1218 | .matches = { | |
1219 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1220 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1221 | }, | |
1222 | }, | |
8c99fdce LB |
1223 | { |
1224 | .callback = thermal_nocrt, | |
1225 | .ident = "Gigabyte GA-7ZX", | |
1226 | .matches = { | |
1227 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1228 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1229 | }, | |
1230 | }, | |
0b5bfa1c LB |
1231 | {} |
1232 | }; | |
0b5bfa1c | 1233 | |
4be44fcd | 1234 | static int __init acpi_thermal_init(void) |
1da177e4 | 1235 | { |
4be44fcd | 1236 | int result = 0; |
1da177e4 | 1237 | |
0b5bfa1c LB |
1238 | dmi_check_system(thermal_dmi_table); |
1239 | ||
72b33ef8 LB |
1240 | if (off) { |
1241 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1242 | return -ENODEV; | |
1243 | } | |
43d9f87b | 1244 | |
1da177e4 | 1245 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
c57b62f5 | 1246 | if (result < 0) |
d550d98d | 1247 | return -ENODEV; |
1da177e4 | 1248 | |
d550d98d | 1249 | return 0; |
1da177e4 LT |
1250 | } |
1251 | ||
4be44fcd | 1252 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1253 | { |
1da177e4 LT |
1254 | |
1255 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1256 | ||
d550d98d | 1257 | return; |
1da177e4 LT |
1258 | } |
1259 | ||
1da177e4 LT |
1260 | module_init(acpi_thermal_init); |
1261 | module_exit(acpi_thermal_exit); |