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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 LT |
52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
53 | #define ACPI_THERMAL_FILE_STATE "state" | |
54 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
55 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
56 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
57 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
58 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
59 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
60 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
61 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
62 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
63 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
64 | |
65 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
66 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
67 | ||
1da177e4 | 68 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 69 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 70 | |
1cbf4c56 | 71 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 72 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
73 | MODULE_LICENSE("GPL"); |
74 | ||
f8707ec9 LB |
75 | static int act; |
76 | module_param(act, int, 0644); | |
3c1d36da | 77 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 78 | |
c52a7419 LB |
79 | static int crt; |
80 | module_param(crt, int, 0644); | |
81 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
82 | ||
1da177e4 | 83 | static int tzp; |
730ff34d | 84 | module_param(tzp, int, 0444); |
3c1d36da | 85 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 86 | |
f5487145 LB |
87 | static int nocrt; |
88 | module_param(nocrt, int, 0); | |
8c99fdce | 89 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 90 | |
72b33ef8 LB |
91 | static int off; |
92 | module_param(off, int, 0); | |
3c1d36da | 93 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 94 | |
a70cdc52 LB |
95 | static int psv; |
96 | module_param(psv, int, 0644); | |
3c1d36da | 97 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 98 | |
4be44fcd | 99 | static int acpi_thermal_add(struct acpi_device *device); |
51fac838 | 100 | static int acpi_thermal_remove(struct acpi_device *device); |
342d550d | 101 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 | 102 | |
1ba90e3a TR |
103 | static const struct acpi_device_id thermal_device_ids[] = { |
104 | {ACPI_THERMAL_HID, 0}, | |
105 | {"", 0}, | |
106 | }; | |
107 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
108 | ||
90692404 | 109 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 110 | static int acpi_thermal_resume(struct device *dev); |
90692404 | 111 | #endif |
167cffb6 RW |
112 | static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume); |
113 | ||
1da177e4 | 114 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 115 | .name = "thermal", |
4be44fcd | 116 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 117 | .ids = thermal_device_ids, |
4be44fcd LB |
118 | .ops = { |
119 | .add = acpi_thermal_add, | |
120 | .remove = acpi_thermal_remove, | |
342d550d | 121 | .notify = acpi_thermal_notify, |
4be44fcd | 122 | }, |
167cffb6 | 123 | .drv.pm = &acpi_thermal_pm, |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_thermal_state { | |
4be44fcd LB |
127 | u8 critical:1; |
128 | u8 hot:1; | |
129 | u8 passive:1; | |
130 | u8 active:1; | |
131 | u8 reserved:4; | |
132 | int active_index; | |
1da177e4 LT |
133 | }; |
134 | ||
135 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
136 | u8 valid:1; |
137 | u8 enabled:1; | |
138 | u8 reserved:6; | |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_thermal_critical { | |
142 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 143 | unsigned long temperature; |
1da177e4 LT |
144 | }; |
145 | ||
146 | struct acpi_thermal_hot { | |
147 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 148 | unsigned long temperature; |
1da177e4 LT |
149 | }; |
150 | ||
151 | struct acpi_thermal_passive { | |
152 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
153 | unsigned long temperature; |
154 | unsigned long tc1; | |
155 | unsigned long tc2; | |
156 | unsigned long tsp; | |
157 | struct acpi_handle_list devices; | |
1da177e4 LT |
158 | }; |
159 | ||
160 | struct acpi_thermal_active { | |
161 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
162 | unsigned long temperature; |
163 | struct acpi_handle_list devices; | |
1da177e4 LT |
164 | }; |
165 | ||
166 | struct acpi_thermal_trips { | |
167 | struct acpi_thermal_critical critical; | |
4be44fcd | 168 | struct acpi_thermal_hot hot; |
1da177e4 LT |
169 | struct acpi_thermal_passive passive; |
170 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
171 | }; | |
172 | ||
173 | struct acpi_thermal_flags { | |
4be44fcd LB |
174 | u8 cooling_mode:1; /* _SCP */ |
175 | u8 devices:1; /* _TZD */ | |
176 | u8 reserved:6; | |
1da177e4 LT |
177 | }; |
178 | ||
179 | struct acpi_thermal { | |
8348e1b1 | 180 | struct acpi_device * device; |
4be44fcd LB |
181 | acpi_bus_id name; |
182 | unsigned long temperature; | |
183 | unsigned long last_temperature; | |
184 | unsigned long polling_frequency; | |
4be44fcd | 185 | volatile u8 zombie; |
1da177e4 LT |
186 | struct acpi_thermal_flags flags; |
187 | struct acpi_thermal_state state; | |
188 | struct acpi_thermal_trips trips; | |
4be44fcd | 189 | struct acpi_handle_list devices; |
3f655ef8 ZR |
190 | struct thermal_zone_device *thermal_zone; |
191 | int tz_enabled; | |
13614e37 | 192 | int kelvin_offset; |
6e215785 | 193 | struct mutex lock; |
1da177e4 LT |
194 | }; |
195 | ||
1da177e4 LT |
196 | /* -------------------------------------------------------------------------- |
197 | Thermal Zone Management | |
198 | -------------------------------------------------------------------------- */ | |
199 | ||
4be44fcd | 200 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 201 | { |
4be44fcd | 202 | acpi_status status = AE_OK; |
27663c58 | 203 | unsigned long long tmp; |
1da177e4 LT |
204 | |
205 | if (!tz) | |
d550d98d | 206 | return -EINVAL; |
1da177e4 LT |
207 | |
208 | tz->last_temperature = tz->temperature; | |
209 | ||
27663c58 | 210 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 211 | if (ACPI_FAILURE(status)) |
d550d98d | 212 | return -ENODEV; |
1da177e4 | 213 | |
27663c58 | 214 | tz->temperature = tmp; |
4be44fcd LB |
215 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
216 | tz->temperature)); | |
1da177e4 | 217 | |
d550d98d | 218 | return 0; |
1da177e4 LT |
219 | } |
220 | ||
4be44fcd | 221 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 222 | { |
4be44fcd | 223 | acpi_status status = AE_OK; |
27663c58 | 224 | unsigned long long tmp; |
1da177e4 LT |
225 | |
226 | if (!tz) | |
d550d98d | 227 | return -EINVAL; |
1da177e4 | 228 | |
27663c58 | 229 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 230 | if (ACPI_FAILURE(status)) |
d550d98d | 231 | return -ENODEV; |
1da177e4 | 232 | |
27663c58 | 233 | tz->polling_frequency = tmp; |
4be44fcd LB |
234 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
235 | tz->polling_frequency)); | |
1da177e4 | 236 | |
d550d98d | 237 | return 0; |
1da177e4 LT |
238 | } |
239 | ||
4be44fcd | 240 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 241 | { |
4be44fcd LB |
242 | acpi_status status = AE_OK; |
243 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
244 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
245 | acpi_handle handle = NULL; | |
1da177e4 | 246 | |
1da177e4 LT |
247 | |
248 | if (!tz) | |
d550d98d | 249 | return -EINVAL; |
1da177e4 | 250 | |
38ba7c9e | 251 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
252 | if (ACPI_FAILURE(status)) { |
253 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 254 | return -ENODEV; |
1da177e4 LT |
255 | } |
256 | ||
257 | arg0.integer.value = mode; | |
258 | ||
259 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
260 | if (ACPI_FAILURE(status)) | |
d550d98d | 261 | return -ENODEV; |
1da177e4 | 262 | |
d550d98d | 263 | return 0; |
1da177e4 LT |
264 | } |
265 | ||
ce44e197 ZR |
266 | #define ACPI_TRIPS_CRITICAL 0x01 |
267 | #define ACPI_TRIPS_HOT 0x02 | |
268 | #define ACPI_TRIPS_PASSIVE 0x04 | |
269 | #define ACPI_TRIPS_ACTIVE 0x08 | |
270 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 271 | |
ce44e197 ZR |
272 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
273 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 274 | |
ce44e197 ZR |
275 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
276 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
277 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 278 | |
ce44e197 ZR |
279 | /* |
280 | * This exception is thrown out in two cases: | |
281 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
282 | * when re-evaluating the AML code. | |
283 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
284 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
285 | */ | |
286 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
287 | do { \ | |
288 | if (flags != ACPI_TRIPS_INIT) \ | |
289 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
290 | "ACPI thermal trip point %s changed\n" \ | |
7e3cf246 | 291 | "Please send acpidump to linux-acpi@vger.kernel.org", str)); \ |
ce44e197 ZR |
292 | } while (0) |
293 | ||
294 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
295 | { | |
296 | acpi_status status = AE_OK; | |
27663c58 | 297 | unsigned long long tmp; |
ce44e197 ZR |
298 | struct acpi_handle_list devices; |
299 | int valid = 0; | |
300 | int i; | |
1da177e4 | 301 | |
fa809452 | 302 | /* Critical Shutdown */ |
ce44e197 ZR |
303 | if (flag & ACPI_TRIPS_CRITICAL) { |
304 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
305 | "_CRT", NULL, &tmp); |
306 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
307 | /* |
308 | * Treat freezing temperatures as invalid as well; some | |
309 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 310 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
311 | * ... so lets discard those as invalid. |
312 | */ | |
fa809452 TR |
313 | if (ACPI_FAILURE(status)) { |
314 | tz->trips.critical.flags.valid = 0; | |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
316 | "No critical threshold\n")); | |
317 | } else if (tmp <= 2732) { | |
318 | printk(KERN_WARNING FW_BUG "Invalid critical threshold " | |
319 | "(%llu)\n", tmp); | |
c52a7419 | 320 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
321 | } else { |
322 | tz->trips.critical.flags.valid = 1; | |
323 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
324 | "Found critical threshold [%lu]\n", |
325 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
326 | } |
327 | if (tz->trips.critical.flags.valid == 1) { | |
328 | if (crt == -1) { | |
329 | tz->trips.critical.flags.valid = 0; | |
330 | } else if (crt > 0) { | |
331 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
332 | /* | |
22a94d79 | 333 | * Allow override critical threshold |
ce44e197 | 334 | */ |
22a94d79 ZR |
335 | if (crt_k > tz->trips.critical.temperature) |
336 | printk(KERN_WARNING PREFIX | |
337 | "Critical threshold %d C\n", crt); | |
338 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 339 | } |
c52a7419 LB |
340 | } |
341 | } | |
342 | ||
1da177e4 | 343 | /* Critical Sleep (optional) */ |
ce44e197 | 344 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 345 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 346 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
347 | if (ACPI_FAILURE(status)) { |
348 | tz->trips.hot.flags.valid = 0; | |
349 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
350 | "No hot threshold\n")); | |
351 | } else { | |
27663c58 | 352 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
353 | tz->trips.hot.flags.valid = 1; |
354 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
355 | "Found hot threshold [%lu]\n", | |
356 | tz->trips.critical.temperature)); | |
357 | } | |
a70cdc52 LB |
358 | } |
359 | ||
ce44e197 | 360 | /* Passive (optional) */ |
0e4240d9 ZR |
361 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
362 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
363 | valid = tz->trips.passive.flags.valid; |
364 | if (psv == -1) { | |
365 | status = AE_SUPPORT; | |
366 | } else if (psv > 0) { | |
27663c58 | 367 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
368 | status = AE_OK; |
369 | } else { | |
370 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 371 | "_PSV", NULL, &tmp); |
ce44e197 | 372 | } |
1da177e4 | 373 | |
1da177e4 LT |
374 | if (ACPI_FAILURE(status)) |
375 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 376 | else { |
27663c58 | 377 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
378 | tz->trips.passive.flags.valid = 1; |
379 | if (flag == ACPI_TRIPS_INIT) { | |
380 | status = acpi_evaluate_integer( | |
381 | tz->device->handle, "_TC1", | |
27663c58 | 382 | NULL, &tmp); |
ce44e197 ZR |
383 | if (ACPI_FAILURE(status)) |
384 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
385 | else |
386 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
387 | status = acpi_evaluate_integer( |
388 | tz->device->handle, "_TC2", | |
27663c58 | 389 | NULL, &tmp); |
ce44e197 ZR |
390 | if (ACPI_FAILURE(status)) |
391 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
392 | else |
393 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
394 | status = acpi_evaluate_integer( |
395 | tz->device->handle, "_TSP", | |
27663c58 | 396 | NULL, &tmp); |
ce44e197 ZR |
397 | if (ACPI_FAILURE(status)) |
398 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
399 | else |
400 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
401 | } |
402 | } | |
403 | } | |
404 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
405 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
406 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
407 | NULL, &devices); | |
0e4240d9 ZR |
408 | if (ACPI_FAILURE(status)) { |
409 | printk(KERN_WARNING PREFIX | |
410 | "Invalid passive threshold\n"); | |
1da177e4 | 411 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 412 | } |
1da177e4 | 413 | else |
ce44e197 | 414 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 415 | |
ce44e197 ZR |
416 | if (memcmp(&tz->trips.passive.devices, &devices, |
417 | sizeof(struct acpi_handle_list))) { | |
418 | memcpy(&tz->trips.passive.devices, &devices, | |
419 | sizeof(struct acpi_handle_list)); | |
420 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
421 | } | |
422 | } | |
423 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
424 | if (valid != tz->trips.passive.flags.valid) | |
425 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
426 | } | |
1da177e4 | 427 | |
ce44e197 | 428 | /* Active (optional) */ |
4be44fcd | 429 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 430 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 431 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 432 | |
f8707ec9 | 433 | if (act == -1) |
ce44e197 ZR |
434 | break; /* disable all active trip points */ |
435 | ||
0e4240d9 ZR |
436 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
437 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 438 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 439 | name, NULL, &tmp); |
ce44e197 ZR |
440 | if (ACPI_FAILURE(status)) { |
441 | tz->trips.active[i].flags.valid = 0; | |
442 | if (i == 0) | |
443 | break; | |
444 | if (act <= 0) | |
445 | break; | |
446 | if (i == 1) | |
447 | tz->trips.active[0].temperature = | |
448 | CELSIUS_TO_KELVIN(act); | |
449 | else | |
450 | /* | |
451 | * Don't allow override higher than | |
452 | * the next higher trip point | |
453 | */ | |
454 | tz->trips.active[i - 1].temperature = | |
455 | (tz->trips.active[i - 2].temperature < | |
456 | CELSIUS_TO_KELVIN(act) ? | |
457 | tz->trips.active[i - 2].temperature : | |
458 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 459 | break; |
27663c58 MW |
460 | } else { |
461 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 462 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 463 | } |
f8707ec9 | 464 | } |
1da177e4 LT |
465 | |
466 | name[2] = 'L'; | |
ce44e197 ZR |
467 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
468 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
469 | status = acpi_evaluate_reference(tz->device->handle, | |
470 | name, NULL, &devices); | |
0e4240d9 ZR |
471 | if (ACPI_FAILURE(status)) { |
472 | printk(KERN_WARNING PREFIX | |
473 | "Invalid active%d threshold\n", i); | |
ce44e197 | 474 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 475 | } |
ce44e197 ZR |
476 | else |
477 | tz->trips.active[i].flags.valid = 1; | |
478 | ||
479 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
480 | sizeof(struct acpi_handle_list))) { | |
481 | memcpy(&tz->trips.active[i].devices, &devices, | |
482 | sizeof(struct acpi_handle_list)); | |
483 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
484 | } | |
485 | } | |
486 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
487 | if (valid != tz->trips.active[i].flags.valid) | |
488 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
489 | ||
490 | if (!tz->trips.active[i].flags.valid) | |
491 | break; | |
492 | } | |
493 | ||
494 | if (flag & ACPI_TRIPS_DEVICES) { | |
495 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
496 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
497 | NULL, &devices); | |
498 | if (memcmp(&tz->devices, &devices, | |
499 | sizeof(struct acpi_handle_list))) { | |
500 | memcpy(&tz->devices, &devices, | |
501 | sizeof(struct acpi_handle_list)); | |
502 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
503 | } | |
1da177e4 LT |
504 | } |
505 | ||
d550d98d | 506 | return 0; |
1da177e4 LT |
507 | } |
508 | ||
ce44e197 | 509 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 510 | { |
8b7ef6d8 TR |
511 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
512 | ||
513 | if (ret) | |
514 | return ret; | |
515 | ||
516 | valid = tz->trips.critical.flags.valid | | |
517 | tz->trips.hot.flags.valid | | |
518 | tz->trips.passive.flags.valid; | |
519 | ||
520 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
521 | valid |= tz->trips.active[i].flags.valid; | |
522 | ||
523 | if (!valid) { | |
524 | printk(KERN_WARNING FW_BUG "No valid trip found\n"); | |
525 | return -ENODEV; | |
526 | } | |
527 | return 0; | |
1da177e4 LT |
528 | } |
529 | ||
4be44fcd | 530 | static void acpi_thermal_check(void *data) |
1da177e4 | 531 | { |
50dd0969 | 532 | struct acpi_thermal *tz = data; |
1da177e4 | 533 | |
ca4e7130 SP |
534 | if (!tz->tz_enabled) { |
535 | pr_warn("thermal zone is disabled \n"); | |
536 | return; | |
537 | } | |
b1569e99 | 538 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
539 | } |
540 | ||
3f655ef8 | 541 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 542 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 543 | |
6503e5df MG |
544 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
545 | unsigned long *temp) | |
3f655ef8 ZR |
546 | { |
547 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 548 | int result; |
3f655ef8 ZR |
549 | |
550 | if (!tz) | |
551 | return -EINVAL; | |
552 | ||
76ecb4f2 ZR |
553 | result = acpi_thermal_get_temperature(tz); |
554 | if (result) | |
555 | return result; | |
556 | ||
13614e37 | 557 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 558 | return 0; |
3f655ef8 ZR |
559 | } |
560 | ||
3f655ef8 | 561 | static int thermal_get_mode(struct thermal_zone_device *thermal, |
6503e5df | 562 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
563 | { |
564 | struct acpi_thermal *tz = thermal->devdata; | |
565 | ||
566 | if (!tz) | |
567 | return -EINVAL; | |
568 | ||
6503e5df MG |
569 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
570 | THERMAL_DEVICE_DISABLED; | |
571 | ||
572 | return 0; | |
3f655ef8 ZR |
573 | } |
574 | ||
575 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 576 | enum thermal_device_mode mode) |
3f655ef8 ZR |
577 | { |
578 | struct acpi_thermal *tz = thermal->devdata; | |
579 | int enable; | |
580 | ||
581 | if (!tz) | |
582 | return -EINVAL; | |
583 | ||
584 | /* | |
585 | * enable/disable thermal management from ACPI thermal driver | |
586 | */ | |
6503e5df | 587 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 588 | enable = 1; |
6503e5df | 589 | else if (mode == THERMAL_DEVICE_DISABLED) |
3f655ef8 ZR |
590 | enable = 0; |
591 | else | |
592 | return -EINVAL; | |
593 | ||
594 | if (enable != tz->tz_enabled) { | |
595 | tz->tz_enabled = enable; | |
596 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
8eaa8d6c ZR |
597 | "%s kernel ACPI thermal control\n", |
598 | tz->tz_enabled ? "Enable" : "Disable")); | |
3f655ef8 ZR |
599 | acpi_thermal_check(tz); |
600 | } | |
601 | return 0; | |
602 | } | |
603 | ||
604 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 605 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
606 | { |
607 | struct acpi_thermal *tz = thermal->devdata; | |
608 | int i; | |
609 | ||
610 | if (!tz || trip < 0) | |
611 | return -EINVAL; | |
612 | ||
613 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
614 | if (!trip) { |
615 | *type = THERMAL_TRIP_CRITICAL; | |
616 | return 0; | |
617 | } | |
3f655ef8 ZR |
618 | trip--; |
619 | } | |
620 | ||
621 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
622 | if (!trip) { |
623 | *type = THERMAL_TRIP_HOT; | |
624 | return 0; | |
625 | } | |
3f655ef8 ZR |
626 | trip--; |
627 | } | |
628 | ||
629 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
630 | if (!trip) { |
631 | *type = THERMAL_TRIP_PASSIVE; | |
632 | return 0; | |
633 | } | |
3f655ef8 ZR |
634 | trip--; |
635 | } | |
636 | ||
637 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
638 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
639 | if (!trip) { |
640 | *type = THERMAL_TRIP_ACTIVE; | |
641 | return 0; | |
642 | } | |
3f655ef8 ZR |
643 | trip--; |
644 | } | |
645 | ||
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
6503e5df | 650 | int trip, unsigned long *temp) |
3f655ef8 ZR |
651 | { |
652 | struct acpi_thermal *tz = thermal->devdata; | |
653 | int i; | |
654 | ||
655 | if (!tz || trip < 0) | |
656 | return -EINVAL; | |
657 | ||
658 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
659 | if (!trip) { |
660 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
661 | tz->trips.critical.temperature, |
662 | tz->kelvin_offset); | |
6503e5df MG |
663 | return 0; |
664 | } | |
3f655ef8 ZR |
665 | trip--; |
666 | } | |
667 | ||
668 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
669 | if (!trip) { |
670 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
671 | tz->trips.hot.temperature, |
672 | tz->kelvin_offset); | |
6503e5df MG |
673 | return 0; |
674 | } | |
3f655ef8 ZR |
675 | trip--; |
676 | } | |
677 | ||
678 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
679 | if (!trip) { |
680 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
681 | tz->trips.passive.temperature, |
682 | tz->kelvin_offset); | |
6503e5df MG |
683 | return 0; |
684 | } | |
3f655ef8 ZR |
685 | trip--; |
686 | } | |
687 | ||
688 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
689 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
690 | if (!trip) { |
691 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
692 | tz->trips.active[i].temperature, |
693 | tz->kelvin_offset); | |
6503e5df MG |
694 | return 0; |
695 | } | |
3f655ef8 ZR |
696 | trip--; |
697 | } | |
698 | ||
699 | return -EINVAL; | |
700 | } | |
701 | ||
9ec732ff ZR |
702 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
703 | unsigned long *temperature) { | |
704 | struct acpi_thermal *tz = thermal->devdata; | |
705 | ||
706 | if (tz->trips.critical.flags.valid) { | |
707 | *temperature = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
708 | tz->trips.critical.temperature, |
709 | tz->kelvin_offset); | |
9ec732ff ZR |
710 | return 0; |
711 | } else | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
601f3d42 ZR |
715 | static int thermal_get_trend(struct thermal_zone_device *thermal, |
716 | int trip, enum thermal_trend *trend) | |
717 | { | |
718 | struct acpi_thermal *tz = thermal->devdata; | |
719 | enum thermal_trip_type type; | |
720 | int i; | |
721 | ||
722 | if (thermal_get_trip_type(thermal, trip, &type)) | |
723 | return -EINVAL; | |
724 | ||
4ae46bef | 725 | if (type == THERMAL_TRIP_ACTIVE) { |
94a40931 ZR |
726 | unsigned long trip_temp; |
727 | unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature, | |
728 | tz->kelvin_offset); | |
729 | if (thermal_get_trip_temp(thermal, trip, &trip_temp)) | |
730 | return -EINVAL; | |
731 | ||
732 | if (temp > trip_temp) { | |
733 | *trend = THERMAL_TREND_RAISING; | |
734 | return 0; | |
735 | } else { | |
736 | /* Fall back on default trend */ | |
737 | return -EINVAL; | |
738 | } | |
4ae46bef | 739 | } |
601f3d42 ZR |
740 | |
741 | /* | |
742 | * tz->temperature has already been updated by generic thermal layer, | |
743 | * before this callback being invoked | |
744 | */ | |
745 | i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature)) | |
746 | + (tz->trips.passive.tc2 | |
747 | * (tz->temperature - tz->trips.passive.temperature)); | |
748 | ||
749 | if (i > 0) | |
750 | *trend = THERMAL_TREND_RAISING; | |
751 | else if (i < 0) | |
752 | *trend = THERMAL_TREND_DROPPING; | |
753 | else | |
754 | *trend = THERMAL_TREND_STABLE; | |
755 | return 0; | |
756 | } | |
757 | ||
758 | ||
b1569e99 MG |
759 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
760 | enum thermal_trip_type trip_type) | |
761 | { | |
762 | u8 type = 0; | |
763 | struct acpi_thermal *tz = thermal->devdata; | |
764 | ||
765 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
766 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
767 | else if (trip_type == THERMAL_TRIP_HOT) | |
768 | type = ACPI_THERMAL_NOTIFY_HOT; | |
769 | else | |
770 | return 0; | |
771 | ||
772 | acpi_bus_generate_proc_event(tz->device, type, 1); | |
773 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, | |
f6f5c45e | 774 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
775 | |
776 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
777 | return 1; | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
3f655ef8 ZR |
782 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, |
783 | struct thermal_cooling_device *cdev, | |
9d99842f | 784 | bool bind) |
3f655ef8 ZR |
785 | { |
786 | struct acpi_device *device = cdev->devdata; | |
787 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
788 | struct acpi_device *dev; |
789 | acpi_status status; | |
790 | acpi_handle handle; | |
3f655ef8 ZR |
791 | int i; |
792 | int j; | |
793 | int trip = -1; | |
794 | int result = 0; | |
795 | ||
796 | if (tz->trips.critical.flags.valid) | |
797 | trip++; | |
798 | ||
799 | if (tz->trips.hot.flags.valid) | |
800 | trip++; | |
801 | ||
802 | if (tz->trips.passive.flags.valid) { | |
803 | trip++; | |
804 | for (i = 0; i < tz->trips.passive.devices.count; | |
805 | i++) { | |
653a00c9 ZR |
806 | handle = tz->trips.passive.devices.handles[i]; |
807 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
808 | if (ACPI_FAILURE(status) || dev != device) |
809 | continue; | |
810 | if (bind) | |
811 | result = | |
812 | thermal_zone_bind_cooling_device | |
813 | (thermal, trip, cdev, | |
814 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
815 | else | |
816 | result = | |
817 | thermal_zone_unbind_cooling_device | |
818 | (thermal, trip, cdev); | |
819 | if (result) | |
820 | goto failed; | |
3f655ef8 ZR |
821 | } |
822 | } | |
823 | ||
824 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
825 | if (!tz->trips.active[i].flags.valid) | |
826 | break; | |
827 | trip++; | |
828 | for (j = 0; | |
829 | j < tz->trips.active[i].devices.count; | |
830 | j++) { | |
653a00c9 ZR |
831 | handle = tz->trips.active[i].devices.handles[j]; |
832 | status = acpi_bus_get_device(handle, &dev); | |
9d99842f ZR |
833 | if (ACPI_FAILURE(status) || dev != device) |
834 | continue; | |
835 | if (bind) | |
836 | result = thermal_zone_bind_cooling_device | |
837 | (thermal, trip, cdev, | |
838 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
839 | else | |
840 | result = thermal_zone_unbind_cooling_device | |
841 | (thermal, trip, cdev); | |
842 | if (result) | |
843 | goto failed; | |
3f655ef8 ZR |
844 | } |
845 | } | |
846 | ||
847 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
848 | handle = tz->devices.handles[i]; |
849 | status = acpi_bus_get_device(handle, &dev); | |
850 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
9d99842f ZR |
851 | if (bind) |
852 | result = thermal_zone_bind_cooling_device | |
853 | (thermal, -1, cdev, | |
854 | THERMAL_NO_LIMIT, | |
855 | THERMAL_NO_LIMIT); | |
856 | else | |
857 | result = thermal_zone_unbind_cooling_device | |
858 | (thermal, -1, cdev); | |
653a00c9 ZR |
859 | if (result) |
860 | goto failed; | |
861 | } | |
3f655ef8 ZR |
862 | } |
863 | ||
864 | failed: | |
865 | return result; | |
866 | } | |
867 | ||
868 | static int | |
869 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
870 | struct thermal_cooling_device *cdev) | |
871 | { | |
9d99842f | 872 | return acpi_thermal_cooling_device_cb(thermal, cdev, true); |
3f655ef8 ZR |
873 | } |
874 | ||
875 | static int | |
876 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
877 | struct thermal_cooling_device *cdev) | |
878 | { | |
9d99842f | 879 | return acpi_thermal_cooling_device_cb(thermal, cdev, false); |
3f655ef8 ZR |
880 | } |
881 | ||
9c8b04be | 882 | static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { |
3f655ef8 ZR |
883 | .bind = acpi_thermal_bind_cooling_device, |
884 | .unbind = acpi_thermal_unbind_cooling_device, | |
885 | .get_temp = thermal_get_temp, | |
886 | .get_mode = thermal_get_mode, | |
887 | .set_mode = thermal_set_mode, | |
888 | .get_trip_type = thermal_get_trip_type, | |
889 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 890 | .get_crit_temp = thermal_get_crit_temp, |
601f3d42 | 891 | .get_trend = thermal_get_trend, |
b1569e99 | 892 | .notify = thermal_notify, |
3f655ef8 ZR |
893 | }; |
894 | ||
895 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
896 | { | |
897 | int trips = 0; | |
898 | int result; | |
20733939 | 899 | acpi_status status; |
3f655ef8 ZR |
900 | int i; |
901 | ||
902 | if (tz->trips.critical.flags.valid) | |
903 | trips++; | |
904 | ||
905 | if (tz->trips.hot.flags.valid) | |
906 | trips++; | |
907 | ||
908 | if (tz->trips.passive.flags.valid) | |
909 | trips++; | |
910 | ||
911 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
912 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
913 | |
914 | if (tz->trips.passive.flags.valid) | |
915 | tz->thermal_zone = | |
c56f5c03 | 916 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b | 917 | &acpi_thermal_zone_ops, NULL, |
b1569e99 MG |
918 | tz->trips.passive.tsp*100, |
919 | tz->polling_frequency*100); | |
920 | else | |
921 | tz->thermal_zone = | |
c56f5c03 | 922 | thermal_zone_device_register("acpitz", trips, 0, tz, |
50125a9b D |
923 | &acpi_thermal_zone_ops, NULL, |
924 | 0, tz->polling_frequency*100); | |
bb070e43 | 925 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
926 | return -ENODEV; |
927 | ||
928 | result = sysfs_create_link(&tz->device->dev.kobj, | |
929 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
930 | if (result) | |
931 | return result; | |
932 | ||
933 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
934 | &tz->device->dev.kobj, "device"); | |
935 | if (result) | |
936 | return result; | |
937 | ||
20733939 ZR |
938 | status = acpi_attach_data(tz->device->handle, |
939 | acpi_bus_private_data_handler, | |
940 | tz->thermal_zone); | |
941 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
942 | printk(KERN_ERR PREFIX |
943 | "Error attaching device data\n"); | |
20733939 ZR |
944 | return -ENODEV; |
945 | } | |
946 | ||
3f655ef8 ZR |
947 | tz->tz_enabled = 1; |
948 | ||
fc3a8828 GKH |
949 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
950 | tz->thermal_zone->id); | |
3f655ef8 ZR |
951 | return 0; |
952 | } | |
953 | ||
954 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
955 | { | |
956 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
957 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
958 | thermal_zone_device_unregister(tz->thermal_zone); | |
959 | tz->thermal_zone = NULL; | |
20733939 | 960 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
961 | } |
962 | ||
963 | ||
1da177e4 LT |
964 | /* -------------------------------------------------------------------------- |
965 | Driver Interface | |
966 | -------------------------------------------------------------------------- */ | |
967 | ||
342d550d | 968 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 969 | { |
342d550d | 970 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 971 | |
1da177e4 LT |
972 | |
973 | if (!tz) | |
d550d98d | 974 | return; |
1da177e4 | 975 | |
1da177e4 LT |
976 | switch (event) { |
977 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
978 | acpi_thermal_check(tz); | |
979 | break; | |
980 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 981 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 982 | acpi_thermal_check(tz); |
14e04fb3 | 983 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 984 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 985 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
986 | break; |
987 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
988 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
989 | acpi_thermal_check(tz); | |
14e04fb3 | 990 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 991 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 992 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
993 | break; |
994 | default: | |
995 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 996 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
997 | break; |
998 | } | |
1da177e4 LT |
999 | } |
1000 | ||
261cba2d ZR |
1001 | /* |
1002 | * On some platforms, the AML code has dependency about | |
1003 | * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx. | |
1004 | * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after | |
1005 | * /_CRT/_HOT/_PSV/_ACx, or else system will be power off. | |
1006 | * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0 | |
1007 | * if _TMP has never been evaluated. | |
1008 | * | |
1009 | * As this dependency is totally transparent to OS, evaluate | |
1010 | * all of them once, in the order of _CRT/_HOT/_PSV/_ACx, | |
1011 | * _TMP, before they are actually used. | |
1012 | */ | |
1013 | static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz) | |
1014 | { | |
1015 | acpi_handle handle = tz->device->handle; | |
1016 | unsigned long long value; | |
1017 | int i; | |
1018 | ||
1019 | acpi_evaluate_integer(handle, "_CRT", NULL, &value); | |
1020 | acpi_evaluate_integer(handle, "_HOT", NULL, &value); | |
1021 | acpi_evaluate_integer(handle, "_PSV", NULL, &value); | |
1022 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1023 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; | |
1024 | acpi_status status; | |
1025 | ||
1026 | status = acpi_evaluate_integer(handle, name, NULL, &value); | |
1027 | if (status == AE_NOT_FOUND) | |
1028 | break; | |
1029 | } | |
1030 | acpi_evaluate_integer(handle, "_TMP", NULL, &value); | |
1031 | } | |
1032 | ||
4be44fcd | 1033 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1034 | { |
4be44fcd | 1035 | int result = 0; |
1da177e4 | 1036 | |
1da177e4 LT |
1037 | |
1038 | if (!tz) | |
d550d98d | 1039 | return -EINVAL; |
1da177e4 | 1040 | |
261cba2d ZR |
1041 | acpi_thermal_aml_dependency_fix(tz); |
1042 | ||
9bcb8118 MG |
1043 | /* Get trip points [_CRT, _PSV, etc.] (required) */ |
1044 | result = acpi_thermal_get_trip_points(tz); | |
1da177e4 | 1045 | if (result) |
d550d98d | 1046 | return result; |
1da177e4 | 1047 | |
9bcb8118 MG |
1048 | /* Get temperature [_TMP] (required) */ |
1049 | result = acpi_thermal_get_temperature(tz); | |
1da177e4 | 1050 | if (result) |
d550d98d | 1051 | return result; |
1da177e4 LT |
1052 | |
1053 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1054 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1055 | if (!result) |
1da177e4 | 1056 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1057 | |
1058 | /* Get default polling frequency [_TZP] (optional) */ | |
1059 | if (tzp) | |
1060 | tz->polling_frequency = tzp; | |
1061 | else | |
1062 | acpi_thermal_get_polling_frequency(tz); | |
1063 | ||
d550d98d | 1064 | return 0; |
1da177e4 LT |
1065 | } |
1066 | ||
13614e37 JD |
1067 | /* |
1068 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1069 | * handles temperature values with a single decimal place. As a consequence, | |
1070 | * some implementations use an offset of 273.1 and others use an offset of | |
1071 | * 273.2. Try to find out which one is being used, to present the most | |
1072 | * accurate and visually appealing number. | |
1073 | * | |
1074 | * The heuristic below should work for all ACPI thermal zones which have a | |
1075 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1076 | */ | |
1077 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1078 | { | |
1079 | if (tz->trips.critical.flags.valid && | |
1080 | (tz->trips.critical.temperature % 5) == 1) | |
1081 | tz->kelvin_offset = 2731; | |
1082 | else | |
1083 | tz->kelvin_offset = 2732; | |
1084 | } | |
1085 | ||
4be44fcd | 1086 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1087 | { |
4be44fcd | 1088 | int result = 0; |
4be44fcd | 1089 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1090 | |
1da177e4 LT |
1091 | |
1092 | if (!device) | |
d550d98d | 1093 | return -EINVAL; |
1da177e4 | 1094 | |
36bcbec7 | 1095 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1096 | if (!tz) |
d550d98d | 1097 | return -ENOMEM; |
1da177e4 | 1098 | |
8348e1b1 | 1099 | tz->device = device; |
1da177e4 LT |
1100 | strcpy(tz->name, device->pnp.bus_id); |
1101 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1102 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1103 | device->driver_data = tz; |
6e215785 | 1104 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1105 | |
1106 | ||
1da177e4 LT |
1107 | result = acpi_thermal_get_info(tz); |
1108 | if (result) | |
3f655ef8 ZR |
1109 | goto free_memory; |
1110 | ||
13614e37 JD |
1111 | acpi_thermal_guess_offset(tz); |
1112 | ||
3f655ef8 ZR |
1113 | result = acpi_thermal_register_thermal_zone(tz); |
1114 | if (result) | |
1115 | goto free_memory; | |
1da177e4 | 1116 | |
1da177e4 | 1117 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", |
4be44fcd LB |
1118 | acpi_device_name(device), acpi_device_bid(device), |
1119 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1120 | goto end; |
1da177e4 | 1121 | |
3f655ef8 ZR |
1122 | free_memory: |
1123 | kfree(tz); | |
1124 | end: | |
d550d98d | 1125 | return result; |
1da177e4 LT |
1126 | } |
1127 | ||
51fac838 | 1128 | static int acpi_thermal_remove(struct acpi_device *device) |
1da177e4 | 1129 | { |
4be44fcd | 1130 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1131 | |
1da177e4 | 1132 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1133 | return -EINVAL; |
1da177e4 | 1134 | |
50dd0969 | 1135 | tz = acpi_driver_data(device); |
1da177e4 | 1136 | |
3f655ef8 | 1137 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1138 | mutex_destroy(&tz->lock); |
1da177e4 | 1139 | kfree(tz); |
d550d98d | 1140 | return 0; |
1da177e4 LT |
1141 | } |
1142 | ||
90692404 | 1143 | #ifdef CONFIG_PM_SLEEP |
167cffb6 | 1144 | static int acpi_thermal_resume(struct device *dev) |
74ce1468 | 1145 | { |
167cffb6 | 1146 | struct acpi_thermal *tz; |
b1028c54 KK |
1147 | int i, j, power_state, result; |
1148 | ||
167cffb6 | 1149 | if (!dev) |
d550d98d | 1150 | return -EINVAL; |
74ce1468 | 1151 | |
167cffb6 RW |
1152 | tz = acpi_driver_data(to_acpi_device(dev)); |
1153 | if (!tz) | |
1154 | return -EINVAL; | |
74ce1468 | 1155 | |
bed936f7 | 1156 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1157 | if (!(&tz->trips.active[i])) |
1158 | break; | |
1159 | if (!tz->trips.active[i].flags.valid) | |
1160 | break; | |
1161 | tz->trips.active[i].flags.enabled = 1; | |
1162 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
488a76c5 RW |
1163 | result = acpi_bus_update_power( |
1164 | tz->trips.active[i].devices.handles[j], | |
1165 | &power_state); | |
b1028c54 KK |
1166 | if (result || (power_state != ACPI_STATE_D0)) { |
1167 | tz->trips.active[i].flags.enabled = 0; | |
1168 | break; | |
1169 | } | |
bed936f7 | 1170 | } |
b1028c54 | 1171 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1172 | } |
1173 | ||
b1028c54 | 1174 | acpi_thermal_check(tz); |
74ce1468 KK |
1175 | |
1176 | return AE_OK; | |
1177 | } | |
90692404 | 1178 | #endif |
74ce1468 | 1179 | |
1855256c | 1180 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1181 | |
1182 | if (act == 0) { | |
1183 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1184 | "disabling all active thermal trip points\n", d->ident); | |
1185 | act = -1; | |
1186 | } | |
1187 | return 0; | |
1188 | } | |
1855256c | 1189 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1190 | |
1191 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1192 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1193 | nocrt = 1; | |
1194 | return 0; | |
1195 | } | |
1855256c | 1196 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1197 | |
1198 | if (tzp == 0) { | |
1199 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1200 | "enabling thermal zone polling\n", d->ident); | |
1201 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1202 | } | |
1203 | return 0; | |
1204 | } | |
1855256c | 1205 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1206 | |
1207 | if (psv == 0) { | |
1208 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1209 | "disabling all passive thermal trip points\n", d->ident); | |
1210 | psv = -1; | |
1211 | } | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1216 | /* | |
1217 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1218 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1219 | */ | |
1220 | { | |
1221 | .callback = thermal_act, | |
1222 | .ident = "AOpen i915GMm-HFS", | |
1223 | .matches = { | |
1224 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1225 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1226 | }, | |
1227 | }, | |
1228 | { | |
1229 | .callback = thermal_psv, | |
1230 | .ident = "AOpen i915GMm-HFS", | |
1231 | .matches = { | |
1232 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1233 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1234 | }, | |
1235 | }, | |
1236 | { | |
1237 | .callback = thermal_tzp, | |
1238 | .ident = "AOpen i915GMm-HFS", | |
1239 | .matches = { | |
1240 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1241 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1242 | }, | |
1243 | }, | |
8c99fdce LB |
1244 | { |
1245 | .callback = thermal_nocrt, | |
1246 | .ident = "Gigabyte GA-7ZX", | |
1247 | .matches = { | |
1248 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1249 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1250 | }, | |
1251 | }, | |
0b5bfa1c LB |
1252 | {} |
1253 | }; | |
0b5bfa1c | 1254 | |
4be44fcd | 1255 | static int __init acpi_thermal_init(void) |
1da177e4 | 1256 | { |
4be44fcd | 1257 | int result = 0; |
1da177e4 | 1258 | |
0b5bfa1c LB |
1259 | dmi_check_system(thermal_dmi_table); |
1260 | ||
72b33ef8 LB |
1261 | if (off) { |
1262 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1263 | return -ENODEV; | |
1264 | } | |
43d9f87b | 1265 | |
1da177e4 | 1266 | result = acpi_bus_register_driver(&acpi_thermal_driver); |
c57b62f5 | 1267 | if (result < 0) |
d550d98d | 1268 | return -ENODEV; |
1da177e4 | 1269 | |
d550d98d | 1270 | return 0; |
1da177e4 LT |
1271 | } |
1272 | ||
4be44fcd | 1273 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1274 | { |
1da177e4 LT |
1275 | |
1276 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1277 | ||
d550d98d | 1278 | return; |
1da177e4 LT |
1279 | } |
1280 | ||
1da177e4 LT |
1281 | module_init(acpi_thermal_init); |
1282 | module_exit(acpi_thermal_exit); |