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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 LT |
37 | #include <linux/init.h> |
38 | #include <linux/types.h> | |
39 | #include <linux/proc_fs.h> | |
cd354f1a TS |
40 | #include <linux/timer.h> |
41 | #include <linux/jiffies.h> | |
1da177e4 LT |
42 | #include <linux/kmod.h> |
43 | #include <linux/seq_file.h> | |
10a0a8d4 | 44 | #include <linux/reboot.h> |
1da177e4 | 45 | #include <asm/uaccess.h> |
3f655ef8 | 46 | #include <linux/thermal.h> |
1da177e4 LT |
47 | #include <acpi/acpi_bus.h> |
48 | #include <acpi/acpi_drivers.h> | |
49 | ||
50 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
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 LB |
99 | static int acpi_thermal_add(struct acpi_device *device); |
100 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 101 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
102 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
103 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
104 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 105 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
106 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
107 | const char __user *, size_t, | |
108 | loff_t *); | |
1da177e4 | 109 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
110 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
111 | size_t, loff_t *); | |
1da177e4 | 112 | |
1ba90e3a TR |
113 | static const struct acpi_device_id thermal_device_ids[] = { |
114 | {ACPI_THERMAL_HID, 0}, | |
115 | {"", 0}, | |
116 | }; | |
117 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
118 | ||
1da177e4 | 119 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 120 | .name = "thermal", |
4be44fcd | 121 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 122 | .ids = thermal_device_ids, |
4be44fcd LB |
123 | .ops = { |
124 | .add = acpi_thermal_add, | |
125 | .remove = acpi_thermal_remove, | |
74ce1468 | 126 | .resume = acpi_thermal_resume, |
4be44fcd | 127 | }, |
1da177e4 LT |
128 | }; |
129 | ||
130 | struct acpi_thermal_state { | |
4be44fcd LB |
131 | u8 critical:1; |
132 | u8 hot:1; | |
133 | u8 passive:1; | |
134 | u8 active:1; | |
135 | u8 reserved:4; | |
136 | int active_index; | |
1da177e4 LT |
137 | }; |
138 | ||
139 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
140 | u8 valid:1; |
141 | u8 enabled:1; | |
142 | u8 reserved:6; | |
1da177e4 LT |
143 | }; |
144 | ||
145 | struct acpi_thermal_critical { | |
146 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 147 | unsigned long temperature; |
1da177e4 LT |
148 | }; |
149 | ||
150 | struct acpi_thermal_hot { | |
151 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 152 | unsigned long temperature; |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct acpi_thermal_passive { | |
156 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
157 | unsigned long temperature; |
158 | unsigned long tc1; | |
159 | unsigned long tc2; | |
160 | unsigned long tsp; | |
161 | struct acpi_handle_list devices; | |
1da177e4 LT |
162 | }; |
163 | ||
164 | struct acpi_thermal_active { | |
165 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
166 | unsigned long temperature; |
167 | struct acpi_handle_list devices; | |
1da177e4 LT |
168 | }; |
169 | ||
170 | struct acpi_thermal_trips { | |
171 | struct acpi_thermal_critical critical; | |
4be44fcd | 172 | struct acpi_thermal_hot hot; |
1da177e4 LT |
173 | struct acpi_thermal_passive passive; |
174 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
175 | }; | |
176 | ||
177 | struct acpi_thermal_flags { | |
4be44fcd LB |
178 | u8 cooling_mode:1; /* _SCP */ |
179 | u8 devices:1; /* _TZD */ | |
180 | u8 reserved:6; | |
1da177e4 LT |
181 | }; |
182 | ||
183 | struct acpi_thermal { | |
8348e1b1 | 184 | struct acpi_device * device; |
4be44fcd LB |
185 | acpi_bus_id name; |
186 | unsigned long temperature; | |
187 | unsigned long last_temperature; | |
188 | unsigned long polling_frequency; | |
4be44fcd | 189 | volatile u8 zombie; |
1da177e4 LT |
190 | struct acpi_thermal_flags flags; |
191 | struct acpi_thermal_state state; | |
192 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
193 | struct acpi_handle_list devices; |
194 | struct timer_list timer; | |
3f655ef8 ZR |
195 | struct thermal_zone_device *thermal_zone; |
196 | int tz_enabled; | |
6e215785 | 197 | struct mutex lock; |
1da177e4 LT |
198 | }; |
199 | ||
d7508032 | 200 | static const struct file_operations acpi_thermal_state_fops = { |
cf7acfab | 201 | .owner = THIS_MODULE, |
4be44fcd LB |
202 | .open = acpi_thermal_state_open_fs, |
203 | .read = seq_read, | |
204 | .llseek = seq_lseek, | |
205 | .release = single_release, | |
1da177e4 LT |
206 | }; |
207 | ||
d7508032 | 208 | static const struct file_operations acpi_thermal_temp_fops = { |
cf7acfab | 209 | .owner = THIS_MODULE, |
4be44fcd LB |
210 | .open = acpi_thermal_temp_open_fs, |
211 | .read = seq_read, | |
212 | .llseek = seq_lseek, | |
213 | .release = single_release, | |
1da177e4 LT |
214 | }; |
215 | ||
d7508032 | 216 | static const struct file_operations acpi_thermal_trip_fops = { |
cf7acfab | 217 | .owner = THIS_MODULE, |
4be44fcd LB |
218 | .open = acpi_thermal_trip_open_fs, |
219 | .read = seq_read, | |
4be44fcd LB |
220 | .llseek = seq_lseek, |
221 | .release = single_release, | |
1da177e4 LT |
222 | }; |
223 | ||
d7508032 | 224 | static const struct file_operations acpi_thermal_cooling_fops = { |
cf7acfab | 225 | .owner = THIS_MODULE, |
4be44fcd LB |
226 | .open = acpi_thermal_cooling_open_fs, |
227 | .read = seq_read, | |
228 | .write = acpi_thermal_write_cooling_mode, | |
229 | .llseek = seq_lseek, | |
230 | .release = single_release, | |
1da177e4 LT |
231 | }; |
232 | ||
d7508032 | 233 | static const struct file_operations acpi_thermal_polling_fops = { |
cf7acfab | 234 | .owner = THIS_MODULE, |
4be44fcd LB |
235 | .open = acpi_thermal_polling_open_fs, |
236 | .read = seq_read, | |
237 | .write = acpi_thermal_write_polling, | |
238 | .llseek = seq_lseek, | |
239 | .release = single_release, | |
1da177e4 LT |
240 | }; |
241 | ||
242 | /* -------------------------------------------------------------------------- | |
243 | Thermal Zone Management | |
244 | -------------------------------------------------------------------------- */ | |
245 | ||
4be44fcd | 246 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 247 | { |
4be44fcd | 248 | acpi_status status = AE_OK; |
1da177e4 | 249 | |
1da177e4 LT |
250 | |
251 | if (!tz) | |
d550d98d | 252 | return -EINVAL; |
1da177e4 LT |
253 | |
254 | tz->last_temperature = tz->temperature; | |
255 | ||
4be44fcd | 256 | status = |
38ba7c9e | 257 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 258 | if (ACPI_FAILURE(status)) |
d550d98d | 259 | return -ENODEV; |
1da177e4 | 260 | |
4be44fcd LB |
261 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
262 | tz->temperature)); | |
1da177e4 | 263 | |
d550d98d | 264 | return 0; |
1da177e4 LT |
265 | } |
266 | ||
4be44fcd | 267 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 268 | { |
4be44fcd | 269 | acpi_status status = AE_OK; |
1da177e4 | 270 | |
1da177e4 LT |
271 | |
272 | if (!tz) | |
d550d98d | 273 | return -EINVAL; |
1da177e4 | 274 | |
4be44fcd | 275 | status = |
38ba7c9e | 276 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 277 | &tz->polling_frequency); |
1da177e4 | 278 | if (ACPI_FAILURE(status)) |
d550d98d | 279 | return -ENODEV; |
1da177e4 | 280 | |
4be44fcd LB |
281 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
282 | tz->polling_frequency)); | |
1da177e4 | 283 | |
d550d98d | 284 | return 0; |
1da177e4 LT |
285 | } |
286 | ||
4be44fcd | 287 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 288 | { |
1da177e4 LT |
289 | |
290 | if (!tz) | |
d550d98d | 291 | return -EINVAL; |
1da177e4 LT |
292 | |
293 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
294 | ||
4be44fcd LB |
295 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
296 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 297 | tz->polling_frequency/10)); |
1da177e4 | 298 | |
d550d98d | 299 | return 0; |
1da177e4 LT |
300 | } |
301 | ||
4be44fcd | 302 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 303 | { |
4be44fcd LB |
304 | acpi_status status = AE_OK; |
305 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
306 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
307 | acpi_handle handle = NULL; | |
1da177e4 | 308 | |
1da177e4 LT |
309 | |
310 | if (!tz) | |
d550d98d | 311 | return -EINVAL; |
1da177e4 | 312 | |
38ba7c9e | 313 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
314 | if (ACPI_FAILURE(status)) { |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 316 | return -ENODEV; |
1da177e4 LT |
317 | } |
318 | ||
319 | arg0.integer.value = mode; | |
320 | ||
321 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
322 | if (ACPI_FAILURE(status)) | |
d550d98d | 323 | return -ENODEV; |
1da177e4 | 324 | |
d550d98d | 325 | return 0; |
1da177e4 LT |
326 | } |
327 | ||
ce44e197 ZR |
328 | #define ACPI_TRIPS_CRITICAL 0x01 |
329 | #define ACPI_TRIPS_HOT 0x02 | |
330 | #define ACPI_TRIPS_PASSIVE 0x04 | |
331 | #define ACPI_TRIPS_ACTIVE 0x08 | |
332 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 333 | |
ce44e197 ZR |
334 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
335 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 336 | |
ce44e197 ZR |
337 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
338 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
339 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 340 | |
ce44e197 ZR |
341 | /* |
342 | * This exception is thrown out in two cases: | |
343 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
344 | * when re-evaluating the AML code. | |
345 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
346 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
347 | */ | |
348 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
349 | do { \ | |
350 | if (flags != ACPI_TRIPS_INIT) \ | |
351 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
352 | "ACPI thermal trip point %s changed\n" \ | |
353 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
354 | } while (0) | |
355 | ||
356 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
357 | { | |
358 | acpi_status status = AE_OK; | |
359 | struct acpi_handle_list devices; | |
360 | int valid = 0; | |
361 | int i; | |
1da177e4 | 362 | |
ce44e197 ZR |
363 | /* Critical Shutdown (required) */ |
364 | if (flag & ACPI_TRIPS_CRITICAL) { | |
365 | status = acpi_evaluate_integer(tz->device->handle, | |
366 | "_CRT", NULL, &tz->trips.critical.temperature); | |
a39a2d7c AV |
367 | /* |
368 | * Treat freezing temperatures as invalid as well; some | |
369 | * BIOSes return really low values and cause reboots at startup. | |
370 | * Below zero (Celcius) values clearly aren't right for sure.. | |
371 | * ... so lets discard those as invalid. | |
372 | */ | |
373 | if (ACPI_FAILURE(status) || | |
374 | tz->trips.critical.temperature <= 2732) { | |
c52a7419 | 375 | tz->trips.critical.flags.valid = 0; |
ce44e197 | 376 | ACPI_EXCEPTION((AE_INFO, status, |
a39a2d7c | 377 | "No or invalid critical threshold")); |
ce44e197 ZR |
378 | return -ENODEV; |
379 | } else { | |
380 | tz->trips.critical.flags.valid = 1; | |
381 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
382 | "Found critical threshold [%lu]\n", | |
383 | tz->trips.critical.temperature)); | |
384 | } | |
385 | if (tz->trips.critical.flags.valid == 1) { | |
386 | if (crt == -1) { | |
387 | tz->trips.critical.flags.valid = 0; | |
388 | } else if (crt > 0) { | |
389 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
390 | /* | |
391 | * Allow override to lower critical threshold | |
392 | */ | |
393 | if (crt_k < tz->trips.critical.temperature) | |
394 | tz->trips.critical.temperature = crt_k; | |
395 | } | |
c52a7419 LB |
396 | } |
397 | } | |
398 | ||
1da177e4 | 399 | /* Critical Sleep (optional) */ |
ce44e197 | 400 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 401 | status = acpi_evaluate_integer(tz->device->handle, |
ce44e197 ZR |
402 | "_HOT", NULL, &tz->trips.hot.temperature); |
403 | if (ACPI_FAILURE(status)) { | |
404 | tz->trips.hot.flags.valid = 0; | |
405 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
406 | "No hot threshold\n")); | |
407 | } else { | |
408 | tz->trips.hot.flags.valid = 1; | |
409 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
410 | "Found hot threshold [%lu]\n", | |
411 | tz->trips.critical.temperature)); | |
412 | } | |
a70cdc52 LB |
413 | } |
414 | ||
ce44e197 ZR |
415 | /* Passive (optional) */ |
416 | if (flag & ACPI_TRIPS_PASSIVE) { | |
417 | valid = tz->trips.passive.flags.valid; | |
418 | if (psv == -1) { | |
419 | status = AE_SUPPORT; | |
420 | } else if (psv > 0) { | |
421 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
422 | status = AE_OK; | |
423 | } else { | |
424 | status = acpi_evaluate_integer(tz->device->handle, | |
425 | "_PSV", NULL, &tz->trips.passive.temperature); | |
426 | } | |
1da177e4 | 427 | |
1da177e4 LT |
428 | if (ACPI_FAILURE(status)) |
429 | tz->trips.passive.flags.valid = 0; | |
ce44e197 ZR |
430 | else { |
431 | tz->trips.passive.flags.valid = 1; | |
432 | if (flag == ACPI_TRIPS_INIT) { | |
433 | status = acpi_evaluate_integer( | |
434 | tz->device->handle, "_TC1", | |
435 | NULL, &tz->trips.passive.tc1); | |
436 | if (ACPI_FAILURE(status)) | |
437 | tz->trips.passive.flags.valid = 0; | |
438 | status = acpi_evaluate_integer( | |
439 | tz->device->handle, "_TC2", | |
440 | NULL, &tz->trips.passive.tc2); | |
441 | if (ACPI_FAILURE(status)) | |
442 | tz->trips.passive.flags.valid = 0; | |
443 | status = acpi_evaluate_integer( | |
444 | tz->device->handle, "_TSP", | |
445 | NULL, &tz->trips.passive.tsp); | |
446 | if (ACPI_FAILURE(status)) | |
447 | tz->trips.passive.flags.valid = 0; | |
448 | } | |
449 | } | |
450 | } | |
451 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
452 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
453 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
454 | NULL, &devices); | |
1da177e4 LT |
455 | if (ACPI_FAILURE(status)) |
456 | tz->trips.passive.flags.valid = 0; | |
1da177e4 | 457 | else |
ce44e197 | 458 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 459 | |
ce44e197 ZR |
460 | if (memcmp(&tz->trips.passive.devices, &devices, |
461 | sizeof(struct acpi_handle_list))) { | |
462 | memcpy(&tz->trips.passive.devices, &devices, | |
463 | sizeof(struct acpi_handle_list)); | |
464 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
465 | } | |
466 | } | |
467 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
468 | if (valid != tz->trips.passive.flags.valid) | |
469 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
470 | } | |
1da177e4 | 471 | |
ce44e197 | 472 | /* Active (optional) */ |
4be44fcd | 473 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 474 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 475 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 476 | |
f8707ec9 | 477 | if (act == -1) |
ce44e197 ZR |
478 | break; /* disable all active trip points */ |
479 | ||
480 | if (flag & ACPI_TRIPS_ACTIVE) { | |
481 | status = acpi_evaluate_integer(tz->device->handle, | |
482 | name, NULL, &tz->trips.active[i].temperature); | |
483 | if (ACPI_FAILURE(status)) { | |
484 | tz->trips.active[i].flags.valid = 0; | |
485 | if (i == 0) | |
486 | break; | |
487 | if (act <= 0) | |
488 | break; | |
489 | if (i == 1) | |
490 | tz->trips.active[0].temperature = | |
491 | CELSIUS_TO_KELVIN(act); | |
492 | else | |
493 | /* | |
494 | * Don't allow override higher than | |
495 | * the next higher trip point | |
496 | */ | |
497 | tz->trips.active[i - 1].temperature = | |
498 | (tz->trips.active[i - 2].temperature < | |
499 | CELSIUS_TO_KELVIN(act) ? | |
500 | tz->trips.active[i - 2].temperature : | |
501 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 502 | break; |
ce44e197 ZR |
503 | } else |
504 | tz->trips.active[i].flags.valid = 1; | |
f8707ec9 | 505 | } |
1da177e4 LT |
506 | |
507 | name[2] = 'L'; | |
ce44e197 ZR |
508 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
509 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
510 | status = acpi_evaluate_reference(tz->device->handle, | |
511 | name, NULL, &devices); | |
512 | if (ACPI_FAILURE(status)) | |
513 | tz->trips.active[i].flags.valid = 0; | |
514 | else | |
515 | tz->trips.active[i].flags.valid = 1; | |
516 | ||
517 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
518 | sizeof(struct acpi_handle_list))) { | |
519 | memcpy(&tz->trips.active[i].devices, &devices, | |
520 | sizeof(struct acpi_handle_list)); | |
521 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
522 | } | |
523 | } | |
524 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
525 | if (valid != tz->trips.active[i].flags.valid) | |
526 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
527 | ||
528 | if (!tz->trips.active[i].flags.valid) | |
529 | break; | |
530 | } | |
531 | ||
532 | if (flag & ACPI_TRIPS_DEVICES) { | |
533 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
534 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
535 | NULL, &devices); | |
536 | if (memcmp(&tz->devices, &devices, | |
537 | sizeof(struct acpi_handle_list))) { | |
538 | memcpy(&tz->devices, &devices, | |
539 | sizeof(struct acpi_handle_list)); | |
540 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
541 | } | |
1da177e4 LT |
542 | } |
543 | ||
d550d98d | 544 | return 0; |
1da177e4 LT |
545 | } |
546 | ||
ce44e197 | 547 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 548 | { |
ce44e197 | 549 | return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
1da177e4 LT |
550 | } |
551 | ||
4be44fcd | 552 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 553 | { |
223630fe | 554 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 555 | return -EINVAL; |
1da177e4 LT |
556 | |
557 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 558 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 559 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 560 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
561 | tz->trips.critical.flags.enabled = 0; |
562 | ||
14e04fb3 | 563 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 564 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
565 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
566 | tz->device->dev.bus_id, | |
567 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
568 | tz->trips.critical.flags.enabled); | |
1da177e4 | 569 | |
223630fe ZR |
570 | /* take no action if nocrt is set */ |
571 | if(!nocrt) { | |
572 | printk(KERN_EMERG | |
573 | "Critical temperature reached (%ld C), shutting down.\n", | |
574 | KELVIN_TO_CELSIUS(tz->temperature)); | |
575 | orderly_poweroff(true); | |
576 | } | |
1da177e4 | 577 | |
d550d98d | 578 | return 0; |
1da177e4 LT |
579 | } |
580 | ||
4be44fcd | 581 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 582 | { |
223630fe | 583 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 584 | return -EINVAL; |
1da177e4 LT |
585 | |
586 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 587 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 588 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 589 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
590 | tz->trips.hot.flags.enabled = 0; |
591 | ||
14e04fb3 | 592 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 593 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
594 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
595 | tz->device->dev.bus_id, | |
596 | ACPI_THERMAL_NOTIFY_HOT, | |
597 | tz->trips.hot.flags.enabled); | |
1da177e4 | 598 | |
223630fe | 599 | /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */ |
1da177e4 | 600 | |
d550d98d | 601 | return 0; |
1da177e4 LT |
602 | } |
603 | ||
1cbf4c56 | 604 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 605 | { |
1cbf4c56 | 606 | int result = 1; |
1da177e4 | 607 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
608 | int trend = 0; |
609 | int i = 0; | |
1da177e4 | 610 | |
1da177e4 LT |
611 | |
612 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 613 | return; |
1da177e4 LT |
614 | |
615 | passive = &(tz->trips.passive); | |
616 | ||
617 | /* | |
618 | * Above Trip? | |
619 | * ----------- | |
620 | * Calculate the thermal trend (using the passive cooling equation) | |
621 | * and modify the performance limit for all passive cooling devices | |
622 | * accordingly. Note that we assume symmetry. | |
623 | */ | |
624 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
625 | trend = |
626 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
627 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
628 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
629 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
630 | trend, passive->tc1, tz->temperature, | |
631 | tz->last_temperature, passive->tc2, | |
632 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 633 | passive->flags.enabled = 1; |
1da177e4 LT |
634 | /* Heating up? */ |
635 | if (trend > 0) | |
4be44fcd LB |
636 | for (i = 0; i < passive->devices.count; i++) |
637 | acpi_processor_set_thermal_limit(passive-> | |
638 | devices. | |
639 | handles[i], | |
640 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 641 | /* Cooling off? */ |
1cbf4c56 | 642 | else if (trend < 0) { |
4be44fcd | 643 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
644 | /* |
645 | * assume that we are on highest | |
646 | * freq/lowest thrott and can leave | |
647 | * passive mode, even in error case | |
648 | */ | |
649 | if (!acpi_processor_set_thermal_limit | |
650 | (passive->devices.handles[i], | |
651 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
652 | result = 0; | |
653 | /* | |
654 | * Leave cooling mode, even if the temp might | |
655 | * higher than trip point This is because some | |
656 | * machines might have long thermal polling | |
657 | * frequencies (tsp) defined. We will fall back | |
658 | * into passive mode in next cycle (probably quicker) | |
659 | */ | |
660 | if (result) { | |
661 | passive->flags.enabled = 0; | |
662 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
663 | "Disabling passive cooling, still above threshold," | |
664 | " but we are cooling down\n")); | |
665 | } | |
666 | } | |
667 | return; | |
1da177e4 LT |
668 | } |
669 | ||
670 | /* | |
671 | * Below Trip? | |
672 | * ----------- | |
673 | * Implement passive cooling hysteresis to slowly increase performance | |
674 | * and avoid thrashing around the passive trip point. Note that we | |
675 | * assume symmetry. | |
676 | */ | |
1cbf4c56 TR |
677 | if (!passive->flags.enabled) |
678 | return; | |
679 | for (i = 0; i < passive->devices.count; i++) | |
680 | if (!acpi_processor_set_thermal_limit | |
681 | (passive->devices.handles[i], | |
682 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
683 | result = 0; | |
684 | if (result) { | |
685 | passive->flags.enabled = 0; | |
686 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
687 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 688 | } |
1da177e4 LT |
689 | } |
690 | ||
1cbf4c56 | 691 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 692 | { |
4be44fcd | 693 | int result = 0; |
1da177e4 | 694 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
695 | int i = 0; |
696 | int j = 0; | |
697 | unsigned long maxtemp = 0; | |
1da177e4 | 698 | |
1da177e4 LT |
699 | |
700 | if (!tz) | |
1cbf4c56 | 701 | return; |
1da177e4 | 702 | |
4be44fcd | 703 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
704 | active = &(tz->trips.active[i]); |
705 | if (!active || !active->flags.valid) | |
706 | break; | |
1da177e4 | 707 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
708 | /* |
709 | * Above Threshold? | |
710 | * ---------------- | |
711 | * If not already enabled, turn ON all cooling devices | |
712 | * associated with this active threshold. | |
713 | */ | |
1da177e4 | 714 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
715 | tz->state.active_index = i; |
716 | maxtemp = active->temperature; | |
717 | if (active->flags.enabled) | |
718 | continue; | |
1da177e4 | 719 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
720 | result = |
721 | acpi_bus_set_power(active->devices. | |
722 | handles[j], | |
1cbf4c56 | 723 | ACPI_STATE_D0); |
1da177e4 | 724 | if (result) { |
cece9296 LB |
725 | printk(KERN_WARNING PREFIX |
726 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 727 | active->devices. |
cece9296 | 728 | handles[j]); |
1da177e4 LT |
729 | continue; |
730 | } | |
1cbf4c56 | 731 | active->flags.enabled = 1; |
4be44fcd | 732 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 733 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 734 | active->devices.handles[j])); |
1da177e4 | 735 | } |
1cbf4c56 TR |
736 | continue; |
737 | } | |
738 | if (!active->flags.enabled) | |
739 | continue; | |
740 | /* | |
741 | * Below Threshold? | |
742 | * ---------------- | |
743 | * Turn OFF all cooling devices associated with this | |
744 | * threshold. | |
745 | */ | |
746 | for (j = 0; j < active->devices.count; j++) { | |
747 | result = acpi_bus_set_power(active->devices.handles[j], | |
748 | ACPI_STATE_D3); | |
749 | if (result) { | |
cece9296 LB |
750 | printk(KERN_WARNING PREFIX |
751 | "Unable to turn cooling device [%p] 'off'\n", | |
752 | active->devices.handles[j]); | |
1cbf4c56 TR |
753 | continue; |
754 | } | |
755 | active->flags.enabled = 0; | |
756 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
757 | "Cooling device [%p] now 'off'\n", | |
758 | active->devices.handles[j])); | |
1da177e4 LT |
759 | } |
760 | } | |
1da177e4 LT |
761 | } |
762 | ||
4be44fcd | 763 | static void acpi_thermal_check(void *context); |
1da177e4 | 764 | |
4be44fcd | 765 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
766 | { |
767 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
768 | if (!tz->zombie) | |
b8d35192 | 769 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
770 | } |
771 | ||
4be44fcd | 772 | static void acpi_thermal_check(void *data) |
1da177e4 | 773 | { |
4be44fcd | 774 | int result = 0; |
50dd0969 | 775 | struct acpi_thermal *tz = data; |
4be44fcd | 776 | unsigned long sleep_time = 0; |
21bc42ab | 777 | unsigned long timeout_jiffies = 0; |
4be44fcd | 778 | int i = 0; |
1da177e4 LT |
779 | struct acpi_thermal_state state; |
780 | ||
1da177e4 LT |
781 | |
782 | if (!tz) { | |
6468463a | 783 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 784 | return; |
1da177e4 LT |
785 | } |
786 | ||
6e215785 AS |
787 | /* Check if someone else is already running */ |
788 | if (!mutex_trylock(&tz->lock)) | |
789 | return; | |
790 | ||
1da177e4 LT |
791 | state = tz->state; |
792 | ||
793 | result = acpi_thermal_get_temperature(tz); | |
794 | if (result) | |
6e215785 | 795 | goto unlock; |
4be44fcd | 796 | |
3f655ef8 ZR |
797 | if (!tz->tz_enabled) |
798 | goto unlock; | |
799 | ||
1da177e4 | 800 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 801 | |
1da177e4 LT |
802 | /* |
803 | * Check Trip Points | |
804 | * ----------------- | |
805 | * Compare the current temperature to the trip point values to see | |
806 | * if we've entered one of the thermal policy states. Note that | |
807 | * this function determines when a state is entered, but the | |
808 | * individual policy decides when it is exited (e.g. hysteresis). | |
809 | */ | |
810 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
811 | state.critical |= |
812 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
813 | if (tz->trips.hot.flags.valid) |
814 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
815 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
816 | state.passive |= |
817 | (tz->temperature >= tz->trips.passive.temperature); | |
818 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 819 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
820 | state.active |= |
821 | (tz->temperature >= | |
822 | tz->trips.active[i].temperature); | |
1da177e4 LT |
823 | |
824 | /* | |
825 | * Invoke Policy | |
826 | * ------------- | |
827 | * Separated from the above check to allow individual policy to | |
828 | * determine when to exit a given state. | |
829 | */ | |
830 | if (state.critical) | |
831 | acpi_thermal_critical(tz); | |
832 | if (state.hot) | |
833 | acpi_thermal_hot(tz); | |
834 | if (state.passive) | |
835 | acpi_thermal_passive(tz); | |
836 | if (state.active) | |
837 | acpi_thermal_active(tz); | |
838 | ||
839 | /* | |
840 | * Calculate State | |
841 | * --------------- | |
842 | * Again, separated from the above two to allow independent policy | |
843 | * decisions. | |
844 | */ | |
1cbf4c56 TR |
845 | tz->state.critical = tz->trips.critical.flags.enabled; |
846 | tz->state.hot = tz->trips.hot.flags.enabled; | |
847 | tz->state.passive = tz->trips.passive.flags.enabled; | |
848 | tz->state.active = 0; | |
4be44fcd | 849 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 850 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
851 | |
852 | /* | |
853 | * Calculate Sleep Time | |
854 | * -------------------- | |
855 | * If we're in the passive state, use _TSP's value. Otherwise | |
856 | * use the default polling frequency (e.g. _TZP). If no polling | |
857 | * frequency is specified then we'll wait forever (at least until | |
858 | * a thermal event occurs). Note that _TSP and _TZD values are | |
859 | * given in 1/10th seconds (we must covert to milliseconds). | |
860 | */ | |
21bc42ab | 861 | if (tz->state.passive) { |
1da177e4 | 862 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
863 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
864 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 865 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
866 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
867 | } | |
1da177e4 | 868 | |
4be44fcd LB |
869 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
870 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
871 | |
872 | /* | |
873 | * Schedule Next Poll | |
874 | * ------------------ | |
875 | */ | |
876 | if (!sleep_time) { | |
877 | if (timer_pending(&(tz->timer))) | |
878 | del_timer(&(tz->timer)); | |
4be44fcd | 879 | } else { |
1da177e4 | 880 | if (timer_pending(&(tz->timer))) |
21bc42ab | 881 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 882 | else { |
4be44fcd | 883 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 884 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 885 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
886 | add_timer(&(tz->timer)); |
887 | } | |
888 | } | |
6e215785 AS |
889 | unlock: |
890 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
891 | } |
892 | ||
3f655ef8 | 893 | /* sys I/F for generic thermal sysfs support */ |
5e012760 ZR |
894 | #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200) |
895 | ||
3f655ef8 ZR |
896 | static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) |
897 | { | |
898 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 899 | int result; |
3f655ef8 ZR |
900 | |
901 | if (!tz) | |
902 | return -EINVAL; | |
903 | ||
76ecb4f2 ZR |
904 | result = acpi_thermal_get_temperature(tz); |
905 | if (result) | |
906 | return result; | |
907 | ||
5e012760 | 908 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature)); |
3f655ef8 ZR |
909 | } |
910 | ||
911 | static const char enabled[] = "kernel"; | |
912 | static const char disabled[] = "user"; | |
913 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
914 | char *buf) | |
915 | { | |
916 | struct acpi_thermal *tz = thermal->devdata; | |
917 | ||
918 | if (!tz) | |
919 | return -EINVAL; | |
920 | ||
921 | return sprintf(buf, "%s\n", tz->tz_enabled ? | |
922 | enabled : disabled); | |
923 | } | |
924 | ||
925 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
926 | const char *buf) | |
927 | { | |
928 | struct acpi_thermal *tz = thermal->devdata; | |
929 | int enable; | |
930 | ||
931 | if (!tz) | |
932 | return -EINVAL; | |
933 | ||
934 | /* | |
935 | * enable/disable thermal management from ACPI thermal driver | |
936 | */ | |
937 | if (!strncmp(buf, enabled, sizeof enabled - 1)) | |
938 | enable = 1; | |
939 | else if (!strncmp(buf, disabled, sizeof disabled - 1)) | |
940 | enable = 0; | |
941 | else | |
942 | return -EINVAL; | |
943 | ||
944 | if (enable != tz->tz_enabled) { | |
945 | tz->tz_enabled = enable; | |
946 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
947 | "%s ACPI thermal control\n", | |
948 | tz->tz_enabled ? enabled : disabled)); | |
949 | acpi_thermal_check(tz); | |
950 | } | |
951 | return 0; | |
952 | } | |
953 | ||
954 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
955 | int trip, char *buf) | |
956 | { | |
957 | struct acpi_thermal *tz = thermal->devdata; | |
958 | int i; | |
959 | ||
960 | if (!tz || trip < 0) | |
961 | return -EINVAL; | |
962 | ||
963 | if (tz->trips.critical.flags.valid) { | |
964 | if (!trip) | |
965 | return sprintf(buf, "critical\n"); | |
966 | trip--; | |
967 | } | |
968 | ||
969 | if (tz->trips.hot.flags.valid) { | |
970 | if (!trip) | |
971 | return sprintf(buf, "hot\n"); | |
972 | trip--; | |
973 | } | |
974 | ||
975 | if (tz->trips.passive.flags.valid) { | |
976 | if (!trip) | |
977 | return sprintf(buf, "passive\n"); | |
978 | trip--; | |
979 | } | |
980 | ||
981 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
982 | tz->trips.active[i].flags.valid; i++) { | |
983 | if (!trip) | |
984 | return sprintf(buf, "active%d\n", i); | |
985 | trip--; | |
986 | } | |
987 | ||
988 | return -EINVAL; | |
989 | } | |
990 | ||
991 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
992 | int trip, char *buf) | |
993 | { | |
994 | struct acpi_thermal *tz = thermal->devdata; | |
995 | int i; | |
996 | ||
997 | if (!tz || trip < 0) | |
998 | return -EINVAL; | |
999 | ||
1000 | if (tz->trips.critical.flags.valid) { | |
1001 | if (!trip) | |
5e012760 | 1002 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1003 | tz->trips.critical.temperature)); |
1004 | trip--; | |
1005 | } | |
1006 | ||
1007 | if (tz->trips.hot.flags.valid) { | |
1008 | if (!trip) | |
5e012760 | 1009 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1010 | tz->trips.hot.temperature)); |
1011 | trip--; | |
1012 | } | |
1013 | ||
1014 | if (tz->trips.passive.flags.valid) { | |
1015 | if (!trip) | |
5e012760 | 1016 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1017 | tz->trips.passive.temperature)); |
1018 | trip--; | |
1019 | } | |
1020 | ||
1021 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1022 | tz->trips.active[i].flags.valid; i++) { | |
1023 | if (!trip) | |
5e012760 | 1024 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1025 | tz->trips.active[i].temperature)); |
1026 | trip--; | |
1027 | } | |
1028 | ||
1029 | return -EINVAL; | |
1030 | } | |
1031 | ||
9ec732ff ZR |
1032 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
1033 | unsigned long *temperature) { | |
1034 | struct acpi_thermal *tz = thermal->devdata; | |
1035 | ||
1036 | if (tz->trips.critical.flags.valid) { | |
1037 | *temperature = KELVIN_TO_MILLICELSIUS( | |
1038 | tz->trips.critical.temperature); | |
1039 | return 0; | |
1040 | } else | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
3f655ef8 ZR |
1044 | typedef int (*cb)(struct thermal_zone_device *, int, |
1045 | struct thermal_cooling_device *); | |
1046 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
1047 | struct thermal_cooling_device *cdev, | |
1048 | cb action) | |
1049 | { | |
1050 | struct acpi_device *device = cdev->devdata; | |
1051 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
1052 | struct acpi_device *dev; |
1053 | acpi_status status; | |
1054 | acpi_handle handle; | |
3f655ef8 ZR |
1055 | int i; |
1056 | int j; | |
1057 | int trip = -1; | |
1058 | int result = 0; | |
1059 | ||
1060 | if (tz->trips.critical.flags.valid) | |
1061 | trip++; | |
1062 | ||
1063 | if (tz->trips.hot.flags.valid) | |
1064 | trip++; | |
1065 | ||
1066 | if (tz->trips.passive.flags.valid) { | |
1067 | trip++; | |
1068 | for (i = 0; i < tz->trips.passive.devices.count; | |
1069 | i++) { | |
653a00c9 ZR |
1070 | handle = tz->trips.passive.devices.handles[i]; |
1071 | status = acpi_bus_get_device(handle, &dev); | |
1072 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1073 | result = action(thermal, trip, cdev); | |
1074 | if (result) | |
1075 | goto failed; | |
1076 | } | |
3f655ef8 ZR |
1077 | } |
1078 | } | |
1079 | ||
1080 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1081 | if (!tz->trips.active[i].flags.valid) | |
1082 | break; | |
1083 | trip++; | |
1084 | for (j = 0; | |
1085 | j < tz->trips.active[i].devices.count; | |
1086 | j++) { | |
653a00c9 ZR |
1087 | handle = tz->trips.active[i].devices.handles[j]; |
1088 | status = acpi_bus_get_device(handle, &dev); | |
1089 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1090 | result = action(thermal, trip, cdev); | |
1091 | if (result) | |
1092 | goto failed; | |
1093 | } | |
3f655ef8 ZR |
1094 | } |
1095 | } | |
1096 | ||
1097 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
1098 | handle = tz->devices.handles[i]; |
1099 | status = acpi_bus_get_device(handle, &dev); | |
1100 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1101 | result = action(thermal, -1, cdev); | |
1102 | if (result) | |
1103 | goto failed; | |
1104 | } | |
3f655ef8 ZR |
1105 | } |
1106 | ||
1107 | failed: | |
1108 | return result; | |
1109 | } | |
1110 | ||
1111 | static int | |
1112 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
1113 | struct thermal_cooling_device *cdev) | |
1114 | { | |
1115 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1116 | thermal_zone_bind_cooling_device); | |
1117 | } | |
1118 | ||
1119 | static int | |
1120 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
1121 | struct thermal_cooling_device *cdev) | |
1122 | { | |
1123 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1124 | thermal_zone_unbind_cooling_device); | |
1125 | } | |
1126 | ||
1127 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
1128 | .bind = acpi_thermal_bind_cooling_device, | |
1129 | .unbind = acpi_thermal_unbind_cooling_device, | |
1130 | .get_temp = thermal_get_temp, | |
1131 | .get_mode = thermal_get_mode, | |
1132 | .set_mode = thermal_set_mode, | |
1133 | .get_trip_type = thermal_get_trip_type, | |
1134 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 1135 | .get_crit_temp = thermal_get_crit_temp, |
3f655ef8 ZR |
1136 | }; |
1137 | ||
1138 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
1139 | { | |
1140 | int trips = 0; | |
1141 | int result; | |
20733939 | 1142 | acpi_status status; |
3f655ef8 ZR |
1143 | int i; |
1144 | ||
1145 | if (tz->trips.critical.flags.valid) | |
1146 | trips++; | |
1147 | ||
1148 | if (tz->trips.hot.flags.valid) | |
1149 | trips++; | |
1150 | ||
1151 | if (tz->trips.passive.flags.valid) | |
1152 | trips++; | |
1153 | ||
1154 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1155 | tz->trips.active[i].flags.valid; i++, trips++); | |
e9ae7107 | 1156 | tz->thermal_zone = thermal_zone_device_register("acpitz", |
3f655ef8 | 1157 | trips, tz, &acpi_thermal_zone_ops); |
bb070e43 | 1158 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
1159 | return -ENODEV; |
1160 | ||
1161 | result = sysfs_create_link(&tz->device->dev.kobj, | |
1162 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
1163 | if (result) | |
1164 | return result; | |
1165 | ||
1166 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
1167 | &tz->device->dev.kobj, "device"); | |
1168 | if (result) | |
1169 | return result; | |
1170 | ||
20733939 ZR |
1171 | status = acpi_attach_data(tz->device->handle, |
1172 | acpi_bus_private_data_handler, | |
1173 | tz->thermal_zone); | |
1174 | if (ACPI_FAILURE(status)) { | |
1175 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1176 | "Error attaching device data\n")); | |
1177 | return -ENODEV; | |
1178 | } | |
1179 | ||
3f655ef8 ZR |
1180 | tz->tz_enabled = 1; |
1181 | ||
1182 | printk(KERN_INFO PREFIX "%s is registered as thermal_zone%d\n", | |
1183 | tz->device->dev.bus_id, tz->thermal_zone->id); | |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
1188 | { | |
1189 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
1190 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
1191 | thermal_zone_device_unregister(tz->thermal_zone); | |
1192 | tz->thermal_zone = NULL; | |
20733939 | 1193 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
1194 | } |
1195 | ||
1196 | ||
1da177e4 LT |
1197 | /* -------------------------------------------------------------------------- |
1198 | FS Interface (/proc) | |
1199 | -------------------------------------------------------------------------- */ | |
1200 | ||
4be44fcd | 1201 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
1202 | |
1203 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
1204 | { | |
50dd0969 | 1205 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1206 | |
1da177e4 LT |
1207 | |
1208 | if (!tz) | |
1209 | goto end; | |
1210 | ||
1211 | seq_puts(seq, "state: "); | |
1212 | ||
4be44fcd LB |
1213 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
1214 | && !tz->state.active) | |
1da177e4 LT |
1215 | seq_puts(seq, "ok\n"); |
1216 | else { | |
1217 | if (tz->state.critical) | |
1218 | seq_puts(seq, "critical "); | |
1219 | if (tz->state.hot) | |
1220 | seq_puts(seq, "hot "); | |
1221 | if (tz->state.passive) | |
1222 | seq_puts(seq, "passive "); | |
1223 | if (tz->state.active) | |
1224 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1225 | seq_puts(seq, "\n"); | |
1226 | } | |
1227 | ||
4be44fcd | 1228 | end: |
d550d98d | 1229 | return 0; |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1233 | { | |
1234 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1235 | } | |
1236 | ||
1da177e4 LT |
1237 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1238 | { | |
4be44fcd | 1239 | int result = 0; |
50dd0969 | 1240 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1241 | |
1da177e4 LT |
1242 | |
1243 | if (!tz) | |
1244 | goto end; | |
1245 | ||
1246 | result = acpi_thermal_get_temperature(tz); | |
1247 | if (result) | |
1248 | goto end; | |
1249 | ||
4be44fcd LB |
1250 | seq_printf(seq, "temperature: %ld C\n", |
1251 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1252 | |
4be44fcd | 1253 | end: |
d550d98d | 1254 | return 0; |
1da177e4 LT |
1255 | } |
1256 | ||
1257 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1258 | { | |
1259 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1260 | } | |
1261 | ||
1da177e4 LT |
1262 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1263 | { | |
50dd0969 | 1264 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1265 | struct acpi_device *device; |
e7c746ef TR |
1266 | acpi_status status; |
1267 | ||
4be44fcd LB |
1268 | int i = 0; |
1269 | int j = 0; | |
1da177e4 | 1270 | |
1da177e4 LT |
1271 | |
1272 | if (!tz) | |
1273 | goto end; | |
1274 | ||
1275 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1276 | seq_printf(seq, "critical (S5): %ld C%s", |
1277 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1278 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1279 | |
1280 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1281 | seq_printf(seq, "hot (S4): %ld C%s", |
1282 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1283 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1284 | |
1285 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1286 | seq_printf(seq, |
1287 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1288 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1289 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1290 | tz->trips.passive.tsp); | |
1291 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1292 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1293 | handles[j], &device); | |
1294 | seq_printf(seq, "%4.4s ", status ? "" : | |
1295 | acpi_device_bid(device)); | |
1da177e4 LT |
1296 | } |
1297 | seq_puts(seq, "\n"); | |
1298 | } | |
1299 | ||
1300 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1301 | if (!(tz->trips.active[i].flags.valid)) | |
1302 | break; | |
1303 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1304 | i, |
1305 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1306 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1307 | status = acpi_bus_get_device(tz->trips.active[i]. |
1308 | devices.handles[j], | |
1309 | &device); | |
1310 | seq_printf(seq, "%4.4s ", status ? "" : | |
1311 | acpi_device_bid(device)); | |
68ccfaa8 | 1312 | } |
1da177e4 LT |
1313 | seq_puts(seq, "\n"); |
1314 | } | |
1315 | ||
4be44fcd | 1316 | end: |
d550d98d | 1317 | return 0; |
1da177e4 LT |
1318 | } |
1319 | ||
1320 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1321 | { | |
1322 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1323 | } | |
1324 | ||
1da177e4 LT |
1325 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1326 | { | |
50dd0969 | 1327 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1328 | |
1da177e4 LT |
1329 | |
1330 | if (!tz) | |
1331 | goto end; | |
1332 | ||
eaca2d3f | 1333 | if (!tz->flags.cooling_mode) |
1da177e4 | 1334 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1335 | else |
eaca2d3f | 1336 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1337 | |
4be44fcd | 1338 | end: |
d550d98d | 1339 | return 0; |
1da177e4 LT |
1340 | } |
1341 | ||
1342 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1343 | { | |
1344 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1345 | PDE(inode)->data); |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | static ssize_t | |
4be44fcd LB |
1349 | acpi_thermal_write_cooling_mode(struct file *file, |
1350 | const char __user * buffer, | |
1351 | size_t count, loff_t * ppos) | |
1da177e4 | 1352 | { |
50dd0969 JE |
1353 | struct seq_file *m = file->private_data; |
1354 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1355 | int result = 0; |
1356 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1357 | |
1da177e4 LT |
1358 | |
1359 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1360 | return -EINVAL; |
1da177e4 LT |
1361 | |
1362 | if (!tz->flags.cooling_mode) | |
d550d98d | 1363 | return -ENODEV; |
1da177e4 LT |
1364 | |
1365 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1366 | return -EFAULT; |
4be44fcd | 1367 | |
1da177e4 | 1368 | mode_string[count] = '\0'; |
4be44fcd LB |
1369 | |
1370 | result = acpi_thermal_set_cooling_mode(tz, | |
1371 | simple_strtoul(mode_string, NULL, | |
1372 | 0)); | |
1da177e4 | 1373 | if (result) |
d550d98d | 1374 | return result; |
1da177e4 LT |
1375 | |
1376 | acpi_thermal_check(tz); | |
1377 | ||
d550d98d | 1378 | return count; |
1da177e4 LT |
1379 | } |
1380 | ||
1da177e4 LT |
1381 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1382 | { | |
50dd0969 | 1383 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1384 | |
1da177e4 LT |
1385 | |
1386 | if (!tz) | |
1387 | goto end; | |
1388 | ||
1389 | if (!tz->polling_frequency) { | |
1390 | seq_puts(seq, "<polling disabled>\n"); | |
1391 | goto end; | |
1392 | } | |
1393 | ||
1394 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1395 | (tz->polling_frequency / 10)); |
1da177e4 | 1396 | |
4be44fcd | 1397 | end: |
d550d98d | 1398 | return 0; |
1da177e4 LT |
1399 | } |
1400 | ||
1401 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1402 | { | |
1403 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1404 | PDE(inode)->data); |
1da177e4 LT |
1405 | } |
1406 | ||
1407 | static ssize_t | |
4be44fcd LB |
1408 | acpi_thermal_write_polling(struct file *file, |
1409 | const char __user * buffer, | |
1410 | size_t count, loff_t * ppos) | |
1da177e4 | 1411 | { |
50dd0969 JE |
1412 | struct seq_file *m = file->private_data; |
1413 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1414 | int result = 0; |
1415 | char polling_string[12] = { '\0' }; | |
1416 | int seconds = 0; | |
1da177e4 | 1417 | |
1da177e4 LT |
1418 | |
1419 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1420 | return -EINVAL; |
4be44fcd | 1421 | |
1da177e4 | 1422 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1423 | return -EFAULT; |
4be44fcd | 1424 | |
1da177e4 LT |
1425 | polling_string[count] = '\0'; |
1426 | ||
1427 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1428 | |
1da177e4 LT |
1429 | result = acpi_thermal_set_polling(tz, seconds); |
1430 | if (result) | |
d550d98d | 1431 | return result; |
1da177e4 LT |
1432 | |
1433 | acpi_thermal_check(tz); | |
1434 | ||
d550d98d | 1435 | return count; |
1da177e4 LT |
1436 | } |
1437 | ||
4be44fcd | 1438 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1439 | { |
4be44fcd | 1440 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1441 | |
1da177e4 LT |
1442 | |
1443 | if (!acpi_device_dir(device)) { | |
1444 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1445 | acpi_thermal_dir); |
1da177e4 | 1446 | if (!acpi_device_dir(device)) |
d550d98d | 1447 | return -ENODEV; |
1da177e4 LT |
1448 | acpi_device_dir(device)->owner = THIS_MODULE; |
1449 | } | |
1450 | ||
1451 | /* 'state' [R] */ | |
cf7acfab DL |
1452 | entry = proc_create_data(ACPI_THERMAL_FILE_STATE, |
1453 | S_IRUGO, acpi_device_dir(device), | |
1454 | &acpi_thermal_state_fops, | |
1455 | acpi_driver_data(device)); | |
1da177e4 | 1456 | if (!entry) |
d550d98d | 1457 | return -ENODEV; |
1da177e4 LT |
1458 | |
1459 | /* 'temperature' [R] */ | |
cf7acfab DL |
1460 | entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, |
1461 | S_IRUGO, acpi_device_dir(device), | |
1462 | &acpi_thermal_temp_fops, | |
1463 | acpi_driver_data(device)); | |
1da177e4 | 1464 | if (!entry) |
d550d98d | 1465 | return -ENODEV; |
1da177e4 | 1466 | |
2db9ccba | 1467 | /* 'trip_points' [R] */ |
cf7acfab DL |
1468 | entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, |
1469 | S_IRUGO, | |
1470 | acpi_device_dir(device), | |
1471 | &acpi_thermal_trip_fops, | |
1472 | acpi_driver_data(device)); | |
1da177e4 | 1473 | if (!entry) |
d550d98d | 1474 | return -ENODEV; |
1da177e4 LT |
1475 | |
1476 | /* 'cooling_mode' [R/W] */ | |
cf7acfab DL |
1477 | entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, |
1478 | S_IFREG | S_IRUGO | S_IWUSR, | |
1479 | acpi_device_dir(device), | |
1480 | &acpi_thermal_cooling_fops, | |
1481 | acpi_driver_data(device)); | |
1da177e4 | 1482 | if (!entry) |
d550d98d | 1483 | return -ENODEV; |
1da177e4 LT |
1484 | |
1485 | /* 'polling_frequency' [R/W] */ | |
cf7acfab DL |
1486 | entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, |
1487 | S_IFREG | S_IRUGO | S_IWUSR, | |
1488 | acpi_device_dir(device), | |
1489 | &acpi_thermal_polling_fops, | |
1490 | acpi_driver_data(device)); | |
1da177e4 | 1491 | if (!entry) |
d550d98d | 1492 | return -ENODEV; |
d550d98d | 1493 | return 0; |
1da177e4 LT |
1494 | } |
1495 | ||
4be44fcd | 1496 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1497 | { |
1da177e4 LT |
1498 | |
1499 | if (acpi_device_dir(device)) { | |
1500 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1501 | acpi_device_dir(device)); | |
1502 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1503 | acpi_device_dir(device)); | |
1504 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1505 | acpi_device_dir(device)); | |
1506 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1507 | acpi_device_dir(device)); | |
1508 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1509 | acpi_device_dir(device)); | |
1510 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1511 | acpi_device_dir(device) = NULL; | |
1512 | } | |
1513 | ||
d550d98d | 1514 | return 0; |
1da177e4 LT |
1515 | } |
1516 | ||
1da177e4 LT |
1517 | /* -------------------------------------------------------------------------- |
1518 | Driver Interface | |
1519 | -------------------------------------------------------------------------- */ | |
1520 | ||
4be44fcd | 1521 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1522 | { |
50dd0969 | 1523 | struct acpi_thermal *tz = data; |
4be44fcd | 1524 | struct acpi_device *device = NULL; |
1da177e4 | 1525 | |
1da177e4 LT |
1526 | |
1527 | if (!tz) | |
d550d98d | 1528 | return; |
1da177e4 | 1529 | |
8348e1b1 | 1530 | device = tz->device; |
1da177e4 LT |
1531 | |
1532 | switch (event) { | |
1533 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1534 | acpi_thermal_check(tz); | |
1535 | break; | |
1536 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1537 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1538 | acpi_thermal_check(tz); |
14e04fb3 | 1539 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1540 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1541 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1542 | break; |
1543 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1544 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1545 | acpi_thermal_check(tz); | |
14e04fb3 | 1546 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1547 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1548 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1549 | break; |
1550 | default: | |
1551 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1552 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1553 | break; |
1554 | } | |
1555 | ||
d550d98d | 1556 | return; |
1da177e4 LT |
1557 | } |
1558 | ||
4be44fcd | 1559 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1560 | { |
4be44fcd | 1561 | int result = 0; |
1da177e4 | 1562 | |
1da177e4 LT |
1563 | |
1564 | if (!tz) | |
d550d98d | 1565 | return -EINVAL; |
1da177e4 LT |
1566 | |
1567 | /* Get temperature [_TMP] (required) */ | |
1568 | result = acpi_thermal_get_temperature(tz); | |
1569 | if (result) | |
d550d98d | 1570 | return result; |
1da177e4 LT |
1571 | |
1572 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1573 | result = acpi_thermal_get_trip_points(tz); | |
1574 | if (result) | |
d550d98d | 1575 | return result; |
1da177e4 LT |
1576 | |
1577 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1578 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1579 | if (!result) |
1da177e4 | 1580 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1581 | |
1582 | /* Get default polling frequency [_TZP] (optional) */ | |
1583 | if (tzp) | |
1584 | tz->polling_frequency = tzp; | |
1585 | else | |
1586 | acpi_thermal_get_polling_frequency(tz); | |
1587 | ||
d550d98d | 1588 | return 0; |
1da177e4 LT |
1589 | } |
1590 | ||
4be44fcd | 1591 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1592 | { |
4be44fcd LB |
1593 | int result = 0; |
1594 | acpi_status status = AE_OK; | |
1595 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1596 | |
1da177e4 LT |
1597 | |
1598 | if (!device) | |
d550d98d | 1599 | return -EINVAL; |
1da177e4 | 1600 | |
36bcbec7 | 1601 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1602 | if (!tz) |
d550d98d | 1603 | return -ENOMEM; |
1da177e4 | 1604 | |
8348e1b1 | 1605 | tz->device = device; |
1da177e4 LT |
1606 | strcpy(tz->name, device->pnp.bus_id); |
1607 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1608 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1609 | acpi_driver_data(device) = tz; | |
6e215785 | 1610 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1611 | |
1612 | ||
1da177e4 LT |
1613 | result = acpi_thermal_get_info(tz); |
1614 | if (result) | |
3f655ef8 ZR |
1615 | goto free_memory; |
1616 | ||
1617 | result = acpi_thermal_register_thermal_zone(tz); | |
1618 | if (result) | |
1619 | goto free_memory; | |
1da177e4 LT |
1620 | |
1621 | result = acpi_thermal_add_fs(device); | |
1622 | if (result) | |
3f655ef8 | 1623 | goto unregister_thermal_zone; |
1da177e4 LT |
1624 | |
1625 | init_timer(&tz->timer); | |
1626 | ||
1627 | acpi_thermal_check(tz); | |
1628 | ||
38ba7c9e | 1629 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1630 | ACPI_DEVICE_NOTIFY, |
1631 | acpi_thermal_notify, tz); | |
1da177e4 | 1632 | if (ACPI_FAILURE(status)) { |
1da177e4 | 1633 | result = -ENODEV; |
3f655ef8 | 1634 | goto remove_fs; |
1da177e4 LT |
1635 | } |
1636 | ||
1637 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1638 | acpi_device_name(device), acpi_device_bid(device), |
1639 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1640 | goto end; |
1da177e4 | 1641 | |
3f655ef8 ZR |
1642 | remove_fs: |
1643 | acpi_thermal_remove_fs(device); | |
1644 | unregister_thermal_zone: | |
1645 | thermal_zone_device_unregister(tz->thermal_zone); | |
1646 | free_memory: | |
1647 | kfree(tz); | |
1648 | end: | |
d550d98d | 1649 | return result; |
1da177e4 LT |
1650 | } |
1651 | ||
4be44fcd | 1652 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1653 | { |
4be44fcd LB |
1654 | acpi_status status = AE_OK; |
1655 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1656 | |
1da177e4 LT |
1657 | |
1658 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1659 | return -EINVAL; |
1da177e4 | 1660 | |
50dd0969 | 1661 | tz = acpi_driver_data(device); |
1da177e4 LT |
1662 | |
1663 | /* avoid timer adding new defer task */ | |
1664 | tz->zombie = 1; | |
1665 | /* wait for running timer (on other CPUs) finish */ | |
1666 | del_timer_sync(&(tz->timer)); | |
1667 | /* synchronize deferred task */ | |
1668 | acpi_os_wait_events_complete(NULL); | |
1669 | /* deferred task may reinsert timer */ | |
1670 | del_timer_sync(&(tz->timer)); | |
1671 | ||
38ba7c9e | 1672 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1673 | ACPI_DEVICE_NOTIFY, |
1674 | acpi_thermal_notify); | |
1da177e4 LT |
1675 | |
1676 | /* Terminate policy */ | |
4be44fcd | 1677 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1678 | tz->trips.passive.flags.enabled = 0; |
1679 | acpi_thermal_passive(tz); | |
1680 | } | |
1681 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1682 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1683 | tz->trips.active[0].flags.enabled = 0; |
1684 | acpi_thermal_active(tz); | |
1685 | } | |
1686 | ||
1687 | acpi_thermal_remove_fs(device); | |
3f655ef8 | 1688 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1689 | mutex_destroy(&tz->lock); |
1da177e4 | 1690 | kfree(tz); |
d550d98d | 1691 | return 0; |
1da177e4 LT |
1692 | } |
1693 | ||
5d9464a4 | 1694 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1695 | { |
1696 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1697 | int i, j, power_state, result; |
1698 | ||
74ce1468 KK |
1699 | |
1700 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1701 | return -EINVAL; |
74ce1468 | 1702 | |
50dd0969 | 1703 | tz = acpi_driver_data(device); |
74ce1468 | 1704 | |
bed936f7 | 1705 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1706 | if (!(&tz->trips.active[i])) |
1707 | break; | |
1708 | if (!tz->trips.active[i].flags.valid) | |
1709 | break; | |
1710 | tz->trips.active[i].flags.enabled = 1; | |
1711 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1712 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1713 | handles[j], &power_state); | |
1714 | if (result || (power_state != ACPI_STATE_D0)) { | |
1715 | tz->trips.active[i].flags.enabled = 0; | |
1716 | break; | |
1717 | } | |
bed936f7 | 1718 | } |
b1028c54 | 1719 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1720 | } |
1721 | ||
b1028c54 | 1722 | acpi_thermal_check(tz); |
74ce1468 KK |
1723 | |
1724 | return AE_OK; | |
1725 | } | |
1726 | ||
1855256c | 1727 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1728 | |
1729 | if (act == 0) { | |
1730 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1731 | "disabling all active thermal trip points\n", d->ident); | |
1732 | act = -1; | |
1733 | } | |
1734 | return 0; | |
1735 | } | |
1855256c | 1736 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1737 | |
1738 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1739 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1740 | nocrt = 1; | |
1741 | return 0; | |
1742 | } | |
1855256c | 1743 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1744 | |
1745 | if (tzp == 0) { | |
1746 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1747 | "enabling thermal zone polling\n", d->ident); | |
1748 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1749 | } | |
1750 | return 0; | |
1751 | } | |
1855256c | 1752 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1753 | |
1754 | if (psv == 0) { | |
1755 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1756 | "disabling all passive thermal trip points\n", d->ident); | |
1757 | psv = -1; | |
1758 | } | |
1759 | return 0; | |
1760 | } | |
1761 | ||
1762 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1763 | /* | |
1764 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1765 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1766 | */ | |
1767 | { | |
1768 | .callback = thermal_act, | |
1769 | .ident = "AOpen i915GMm-HFS", | |
1770 | .matches = { | |
1771 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1772 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1773 | }, | |
1774 | }, | |
1775 | { | |
1776 | .callback = thermal_psv, | |
1777 | .ident = "AOpen i915GMm-HFS", | |
1778 | .matches = { | |
1779 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1780 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1781 | }, | |
1782 | }, | |
1783 | { | |
1784 | .callback = thermal_tzp, | |
1785 | .ident = "AOpen i915GMm-HFS", | |
1786 | .matches = { | |
1787 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1788 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1789 | }, | |
1790 | }, | |
8c99fdce LB |
1791 | { |
1792 | .callback = thermal_nocrt, | |
1793 | .ident = "Gigabyte GA-7ZX", | |
1794 | .matches = { | |
1795 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1796 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1797 | }, | |
1798 | }, | |
0b5bfa1c LB |
1799 | {} |
1800 | }; | |
0b5bfa1c | 1801 | |
4be44fcd | 1802 | static int __init acpi_thermal_init(void) |
1da177e4 | 1803 | { |
4be44fcd | 1804 | int result = 0; |
1da177e4 | 1805 | |
0b5bfa1c LB |
1806 | dmi_check_system(thermal_dmi_table); |
1807 | ||
72b33ef8 LB |
1808 | if (off) { |
1809 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1810 | return -ENODEV; | |
1811 | } | |
1da177e4 LT |
1812 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1813 | if (!acpi_thermal_dir) | |
d550d98d | 1814 | return -ENODEV; |
1da177e4 LT |
1815 | acpi_thermal_dir->owner = THIS_MODULE; |
1816 | ||
1817 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1818 | if (result < 0) { | |
1819 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1820 | return -ENODEV; |
1da177e4 LT |
1821 | } |
1822 | ||
d550d98d | 1823 | return 0; |
1da177e4 LT |
1824 | } |
1825 | ||
4be44fcd | 1826 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1827 | { |
1da177e4 LT |
1828 | |
1829 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1830 | ||
1831 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1832 | ||
d550d98d | 1833 | return; |
1da177e4 LT |
1834 | } |
1835 | ||
1da177e4 LT |
1836 | module_init(acpi_thermal_init); |
1837 | module_exit(acpi_thermal_exit); |