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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 | ||
1da177e4 | 50 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 LT |
51 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
52 | #define ACPI_THERMAL_FILE_STATE "state" | |
53 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
54 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
55 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
56 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
57 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
58 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
59 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
60 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
61 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
62 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
63 | |
64 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
65 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
66 | ||
1da177e4 | 67 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 68 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 69 | |
1cbf4c56 | 70 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
f8707ec9 LB |
74 | static int act; |
75 | module_param(act, int, 0644); | |
3c1d36da | 76 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 77 | |
c52a7419 LB |
78 | static int crt; |
79 | module_param(crt, int, 0644); | |
80 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
81 | ||
1da177e4 | 82 | static int tzp; |
730ff34d | 83 | module_param(tzp, int, 0444); |
3c1d36da | 84 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 85 | |
f5487145 LB |
86 | static int nocrt; |
87 | module_param(nocrt, int, 0); | |
8c99fdce | 88 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 89 | |
72b33ef8 LB |
90 | static int off; |
91 | module_param(off, int, 0); | |
3c1d36da | 92 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 93 | |
a70cdc52 LB |
94 | static int psv; |
95 | module_param(psv, int, 0644); | |
3c1d36da | 96 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 97 | |
4be44fcd LB |
98 | static int acpi_thermal_add(struct acpi_device *device); |
99 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 100 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
101 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
102 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
103 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 104 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
105 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
106 | const char __user *, size_t, | |
107 | loff_t *); | |
1da177e4 | 108 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
109 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
110 | size_t, loff_t *); | |
1da177e4 | 111 | |
1ba90e3a TR |
112 | static const struct acpi_device_id thermal_device_ids[] = { |
113 | {ACPI_THERMAL_HID, 0}, | |
114 | {"", 0}, | |
115 | }; | |
116 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
117 | ||
1da177e4 | 118 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 119 | .name = "thermal", |
4be44fcd | 120 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 121 | .ids = thermal_device_ids, |
4be44fcd LB |
122 | .ops = { |
123 | .add = acpi_thermal_add, | |
124 | .remove = acpi_thermal_remove, | |
74ce1468 | 125 | .resume = acpi_thermal_resume, |
4be44fcd | 126 | }, |
1da177e4 LT |
127 | }; |
128 | ||
129 | struct acpi_thermal_state { | |
4be44fcd LB |
130 | u8 critical:1; |
131 | u8 hot:1; | |
132 | u8 passive:1; | |
133 | u8 active:1; | |
134 | u8 reserved:4; | |
135 | int active_index; | |
1da177e4 LT |
136 | }; |
137 | ||
138 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
139 | u8 valid:1; |
140 | u8 enabled:1; | |
141 | u8 reserved:6; | |
1da177e4 LT |
142 | }; |
143 | ||
144 | struct acpi_thermal_critical { | |
145 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 146 | unsigned long temperature; |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_thermal_hot { | |
150 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 151 | unsigned long temperature; |
1da177e4 LT |
152 | }; |
153 | ||
154 | struct acpi_thermal_passive { | |
155 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
156 | unsigned long temperature; |
157 | unsigned long tc1; | |
158 | unsigned long tc2; | |
159 | unsigned long tsp; | |
160 | struct acpi_handle_list devices; | |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_thermal_active { | |
164 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
165 | unsigned long temperature; |
166 | struct acpi_handle_list devices; | |
1da177e4 LT |
167 | }; |
168 | ||
169 | struct acpi_thermal_trips { | |
170 | struct acpi_thermal_critical critical; | |
4be44fcd | 171 | struct acpi_thermal_hot hot; |
1da177e4 LT |
172 | struct acpi_thermal_passive passive; |
173 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
174 | }; | |
175 | ||
176 | struct acpi_thermal_flags { | |
4be44fcd LB |
177 | u8 cooling_mode:1; /* _SCP */ |
178 | u8 devices:1; /* _TZD */ | |
179 | u8 reserved:6; | |
1da177e4 LT |
180 | }; |
181 | ||
182 | struct acpi_thermal { | |
8348e1b1 | 183 | struct acpi_device * device; |
4be44fcd LB |
184 | acpi_bus_id name; |
185 | unsigned long temperature; | |
186 | unsigned long last_temperature; | |
187 | unsigned long polling_frequency; | |
4be44fcd | 188 | volatile u8 zombie; |
1da177e4 LT |
189 | struct acpi_thermal_flags flags; |
190 | struct acpi_thermal_state state; | |
191 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
192 | struct acpi_handle_list devices; |
193 | struct timer_list timer; | |
3f655ef8 ZR |
194 | struct thermal_zone_device *thermal_zone; |
195 | int tz_enabled; | |
6e215785 | 196 | struct mutex lock; |
1da177e4 LT |
197 | }; |
198 | ||
d7508032 | 199 | static const struct file_operations acpi_thermal_state_fops = { |
cf7acfab | 200 | .owner = THIS_MODULE, |
4be44fcd LB |
201 | .open = acpi_thermal_state_open_fs, |
202 | .read = seq_read, | |
203 | .llseek = seq_lseek, | |
204 | .release = single_release, | |
1da177e4 LT |
205 | }; |
206 | ||
d7508032 | 207 | static const struct file_operations acpi_thermal_temp_fops = { |
cf7acfab | 208 | .owner = THIS_MODULE, |
4be44fcd LB |
209 | .open = acpi_thermal_temp_open_fs, |
210 | .read = seq_read, | |
211 | .llseek = seq_lseek, | |
212 | .release = single_release, | |
1da177e4 LT |
213 | }; |
214 | ||
d7508032 | 215 | static const struct file_operations acpi_thermal_trip_fops = { |
cf7acfab | 216 | .owner = THIS_MODULE, |
4be44fcd LB |
217 | .open = acpi_thermal_trip_open_fs, |
218 | .read = seq_read, | |
4be44fcd LB |
219 | .llseek = seq_lseek, |
220 | .release = single_release, | |
1da177e4 LT |
221 | }; |
222 | ||
d7508032 | 223 | static const struct file_operations acpi_thermal_cooling_fops = { |
cf7acfab | 224 | .owner = THIS_MODULE, |
4be44fcd LB |
225 | .open = acpi_thermal_cooling_open_fs, |
226 | .read = seq_read, | |
227 | .write = acpi_thermal_write_cooling_mode, | |
228 | .llseek = seq_lseek, | |
229 | .release = single_release, | |
1da177e4 LT |
230 | }; |
231 | ||
d7508032 | 232 | static const struct file_operations acpi_thermal_polling_fops = { |
cf7acfab | 233 | .owner = THIS_MODULE, |
4be44fcd LB |
234 | .open = acpi_thermal_polling_open_fs, |
235 | .read = seq_read, | |
236 | .write = acpi_thermal_write_polling, | |
237 | .llseek = seq_lseek, | |
238 | .release = single_release, | |
1da177e4 LT |
239 | }; |
240 | ||
241 | /* -------------------------------------------------------------------------- | |
242 | Thermal Zone Management | |
243 | -------------------------------------------------------------------------- */ | |
244 | ||
4be44fcd | 245 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 246 | { |
4be44fcd | 247 | acpi_status status = AE_OK; |
27663c58 | 248 | unsigned long long tmp; |
1da177e4 LT |
249 | |
250 | if (!tz) | |
d550d98d | 251 | return -EINVAL; |
1da177e4 LT |
252 | |
253 | tz->last_temperature = tz->temperature; | |
254 | ||
27663c58 | 255 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 256 | if (ACPI_FAILURE(status)) |
d550d98d | 257 | return -ENODEV; |
1da177e4 | 258 | |
27663c58 | 259 | tz->temperature = tmp; |
4be44fcd LB |
260 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
261 | tz->temperature)); | |
1da177e4 | 262 | |
d550d98d | 263 | return 0; |
1da177e4 LT |
264 | } |
265 | ||
4be44fcd | 266 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 267 | { |
4be44fcd | 268 | acpi_status status = AE_OK; |
27663c58 | 269 | unsigned long long tmp; |
1da177e4 LT |
270 | |
271 | if (!tz) | |
d550d98d | 272 | return -EINVAL; |
1da177e4 | 273 | |
27663c58 | 274 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 275 | if (ACPI_FAILURE(status)) |
d550d98d | 276 | return -ENODEV; |
1da177e4 | 277 | |
27663c58 | 278 | tz->polling_frequency = tmp; |
4be44fcd LB |
279 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
280 | tz->polling_frequency)); | |
1da177e4 | 281 | |
d550d98d | 282 | return 0; |
1da177e4 LT |
283 | } |
284 | ||
4be44fcd | 285 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 286 | { |
1da177e4 LT |
287 | |
288 | if (!tz) | |
d550d98d | 289 | return -EINVAL; |
1da177e4 LT |
290 | |
291 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
292 | ||
4be44fcd LB |
293 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
294 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 295 | tz->polling_frequency/10)); |
1da177e4 | 296 | |
d550d98d | 297 | return 0; |
1da177e4 LT |
298 | } |
299 | ||
4be44fcd | 300 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 301 | { |
4be44fcd LB |
302 | acpi_status status = AE_OK; |
303 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
304 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
305 | acpi_handle handle = NULL; | |
1da177e4 | 306 | |
1da177e4 LT |
307 | |
308 | if (!tz) | |
d550d98d | 309 | return -EINVAL; |
1da177e4 | 310 | |
38ba7c9e | 311 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
312 | if (ACPI_FAILURE(status)) { |
313 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 314 | return -ENODEV; |
1da177e4 LT |
315 | } |
316 | ||
317 | arg0.integer.value = mode; | |
318 | ||
319 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
320 | if (ACPI_FAILURE(status)) | |
d550d98d | 321 | return -ENODEV; |
1da177e4 | 322 | |
d550d98d | 323 | return 0; |
1da177e4 LT |
324 | } |
325 | ||
ce44e197 ZR |
326 | #define ACPI_TRIPS_CRITICAL 0x01 |
327 | #define ACPI_TRIPS_HOT 0x02 | |
328 | #define ACPI_TRIPS_PASSIVE 0x04 | |
329 | #define ACPI_TRIPS_ACTIVE 0x08 | |
330 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 331 | |
ce44e197 ZR |
332 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
333 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 334 | |
ce44e197 ZR |
335 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
336 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
337 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 338 | |
ce44e197 ZR |
339 | /* |
340 | * This exception is thrown out in two cases: | |
341 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
342 | * when re-evaluating the AML code. | |
343 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
344 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
345 | */ | |
346 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
347 | do { \ | |
348 | if (flags != ACPI_TRIPS_INIT) \ | |
349 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
350 | "ACPI thermal trip point %s changed\n" \ | |
351 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
352 | } while (0) | |
353 | ||
354 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
355 | { | |
356 | acpi_status status = AE_OK; | |
27663c58 | 357 | unsigned long long tmp; |
ce44e197 ZR |
358 | struct acpi_handle_list devices; |
359 | int valid = 0; | |
360 | int i; | |
1da177e4 | 361 | |
ce44e197 ZR |
362 | /* Critical Shutdown (required) */ |
363 | if (flag & ACPI_TRIPS_CRITICAL) { | |
364 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
365 | "_CRT", NULL, &tmp); |
366 | tz->trips.critical.temperature = tmp; | |
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 | /* | |
22a94d79 | 391 | * Allow override critical threshold |
ce44e197 | 392 | */ |
22a94d79 ZR |
393 | if (crt_k > tz->trips.critical.temperature) |
394 | printk(KERN_WARNING PREFIX | |
395 | "Critical threshold %d C\n", crt); | |
396 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 397 | } |
c52a7419 LB |
398 | } |
399 | } | |
400 | ||
1da177e4 | 401 | /* Critical Sleep (optional) */ |
ce44e197 | 402 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 403 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 404 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
405 | if (ACPI_FAILURE(status)) { |
406 | tz->trips.hot.flags.valid = 0; | |
407 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
408 | "No hot threshold\n")); | |
409 | } else { | |
27663c58 | 410 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
411 | tz->trips.hot.flags.valid = 1; |
412 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
413 | "Found hot threshold [%lu]\n", | |
414 | tz->trips.critical.temperature)); | |
415 | } | |
a70cdc52 LB |
416 | } |
417 | ||
ce44e197 ZR |
418 | /* Passive (optional) */ |
419 | if (flag & ACPI_TRIPS_PASSIVE) { | |
420 | valid = tz->trips.passive.flags.valid; | |
421 | if (psv == -1) { | |
422 | status = AE_SUPPORT; | |
423 | } else if (psv > 0) { | |
27663c58 | 424 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
425 | status = AE_OK; |
426 | } else { | |
427 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 428 | "_PSV", NULL, &tmp); |
ce44e197 | 429 | } |
1da177e4 | 430 | |
1da177e4 LT |
431 | if (ACPI_FAILURE(status)) |
432 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 433 | else { |
27663c58 | 434 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
435 | tz->trips.passive.flags.valid = 1; |
436 | if (flag == ACPI_TRIPS_INIT) { | |
437 | status = acpi_evaluate_integer( | |
438 | tz->device->handle, "_TC1", | |
27663c58 | 439 | NULL, &tmp); |
ce44e197 ZR |
440 | if (ACPI_FAILURE(status)) |
441 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
442 | else |
443 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
444 | status = acpi_evaluate_integer( |
445 | tz->device->handle, "_TC2", | |
27663c58 | 446 | NULL, &tmp); |
ce44e197 ZR |
447 | if (ACPI_FAILURE(status)) |
448 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
449 | else |
450 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
451 | status = acpi_evaluate_integer( |
452 | tz->device->handle, "_TSP", | |
27663c58 | 453 | NULL, &tmp); |
ce44e197 ZR |
454 | if (ACPI_FAILURE(status)) |
455 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
456 | else |
457 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
458 | } |
459 | } | |
460 | } | |
461 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
462 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
463 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
464 | NULL, &devices); | |
1da177e4 LT |
465 | if (ACPI_FAILURE(status)) |
466 | tz->trips.passive.flags.valid = 0; | |
1da177e4 | 467 | else |
ce44e197 | 468 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 469 | |
ce44e197 ZR |
470 | if (memcmp(&tz->trips.passive.devices, &devices, |
471 | sizeof(struct acpi_handle_list))) { | |
472 | memcpy(&tz->trips.passive.devices, &devices, | |
473 | sizeof(struct acpi_handle_list)); | |
474 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
475 | } | |
476 | } | |
477 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
478 | if (valid != tz->trips.passive.flags.valid) | |
479 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
480 | } | |
1da177e4 | 481 | |
ce44e197 | 482 | /* Active (optional) */ |
4be44fcd | 483 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 484 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 485 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 486 | |
f8707ec9 | 487 | if (act == -1) |
ce44e197 ZR |
488 | break; /* disable all active trip points */ |
489 | ||
490 | if (flag & ACPI_TRIPS_ACTIVE) { | |
491 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 492 | name, NULL, &tmp); |
ce44e197 ZR |
493 | if (ACPI_FAILURE(status)) { |
494 | tz->trips.active[i].flags.valid = 0; | |
495 | if (i == 0) | |
496 | break; | |
497 | if (act <= 0) | |
498 | break; | |
499 | if (i == 1) | |
500 | tz->trips.active[0].temperature = | |
501 | CELSIUS_TO_KELVIN(act); | |
502 | else | |
503 | /* | |
504 | * Don't allow override higher than | |
505 | * the next higher trip point | |
506 | */ | |
507 | tz->trips.active[i - 1].temperature = | |
508 | (tz->trips.active[i - 2].temperature < | |
509 | CELSIUS_TO_KELVIN(act) ? | |
510 | tz->trips.active[i - 2].temperature : | |
511 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 512 | break; |
27663c58 MW |
513 | } else { |
514 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 515 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 516 | } |
f8707ec9 | 517 | } |
1da177e4 LT |
518 | |
519 | name[2] = 'L'; | |
ce44e197 ZR |
520 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
521 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
522 | status = acpi_evaluate_reference(tz->device->handle, | |
523 | name, NULL, &devices); | |
524 | if (ACPI_FAILURE(status)) | |
525 | tz->trips.active[i].flags.valid = 0; | |
526 | else | |
527 | tz->trips.active[i].flags.valid = 1; | |
528 | ||
529 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
530 | sizeof(struct acpi_handle_list))) { | |
531 | memcpy(&tz->trips.active[i].devices, &devices, | |
532 | sizeof(struct acpi_handle_list)); | |
533 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
534 | } | |
535 | } | |
536 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
537 | if (valid != tz->trips.active[i].flags.valid) | |
538 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
539 | ||
540 | if (!tz->trips.active[i].flags.valid) | |
541 | break; | |
542 | } | |
543 | ||
544 | if (flag & ACPI_TRIPS_DEVICES) { | |
545 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
546 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
547 | NULL, &devices); | |
548 | if (memcmp(&tz->devices, &devices, | |
549 | sizeof(struct acpi_handle_list))) { | |
550 | memcpy(&tz->devices, &devices, | |
551 | sizeof(struct acpi_handle_list)); | |
552 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
553 | } | |
1da177e4 LT |
554 | } |
555 | ||
d550d98d | 556 | return 0; |
1da177e4 LT |
557 | } |
558 | ||
ce44e197 | 559 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 560 | { |
ce44e197 | 561 | return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
1da177e4 LT |
562 | } |
563 | ||
4be44fcd | 564 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 565 | { |
223630fe | 566 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 567 | return -EINVAL; |
1da177e4 LT |
568 | |
569 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 570 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 571 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 572 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
573 | tz->trips.critical.flags.enabled = 0; |
574 | ||
14e04fb3 | 575 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 576 | tz->trips.critical.flags.enabled); |
962ce8ca | 577 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
0794469d | 578 | dev_name(&tz->device->dev), |
962ce8ca ZR |
579 | ACPI_THERMAL_NOTIFY_CRITICAL, |
580 | tz->trips.critical.flags.enabled); | |
1da177e4 | 581 | |
223630fe ZR |
582 | /* take no action if nocrt is set */ |
583 | if(!nocrt) { | |
584 | printk(KERN_EMERG | |
585 | "Critical temperature reached (%ld C), shutting down.\n", | |
586 | KELVIN_TO_CELSIUS(tz->temperature)); | |
587 | orderly_poweroff(true); | |
588 | } | |
1da177e4 | 589 | |
d550d98d | 590 | return 0; |
1da177e4 LT |
591 | } |
592 | ||
4be44fcd | 593 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 594 | { |
223630fe | 595 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 596 | return -EINVAL; |
1da177e4 LT |
597 | |
598 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 599 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 600 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 601 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
602 | tz->trips.hot.flags.enabled = 0; |
603 | ||
14e04fb3 | 604 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 605 | tz->trips.hot.flags.enabled); |
962ce8ca | 606 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
0794469d | 607 | dev_name(&tz->device->dev), |
962ce8ca ZR |
608 | ACPI_THERMAL_NOTIFY_HOT, |
609 | tz->trips.hot.flags.enabled); | |
1da177e4 | 610 | |
223630fe | 611 | /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */ |
1da177e4 | 612 | |
d550d98d | 613 | return 0; |
1da177e4 LT |
614 | } |
615 | ||
1cbf4c56 | 616 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 617 | { |
1cbf4c56 | 618 | int result = 1; |
1da177e4 | 619 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
620 | int trend = 0; |
621 | int i = 0; | |
1da177e4 | 622 | |
1da177e4 LT |
623 | |
624 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 625 | return; |
1da177e4 LT |
626 | |
627 | passive = &(tz->trips.passive); | |
628 | ||
629 | /* | |
630 | * Above Trip? | |
631 | * ----------- | |
632 | * Calculate the thermal trend (using the passive cooling equation) | |
633 | * and modify the performance limit for all passive cooling devices | |
634 | * accordingly. Note that we assume symmetry. | |
635 | */ | |
636 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
637 | trend = |
638 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
639 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
640 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
641 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
642 | trend, passive->tc1, tz->temperature, | |
643 | tz->last_temperature, passive->tc2, | |
644 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 645 | passive->flags.enabled = 1; |
1da177e4 LT |
646 | /* Heating up? */ |
647 | if (trend > 0) | |
4be44fcd LB |
648 | for (i = 0; i < passive->devices.count; i++) |
649 | acpi_processor_set_thermal_limit(passive-> | |
650 | devices. | |
651 | handles[i], | |
652 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 653 | /* Cooling off? */ |
1cbf4c56 | 654 | else if (trend < 0) { |
4be44fcd | 655 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
656 | /* |
657 | * assume that we are on highest | |
658 | * freq/lowest thrott and can leave | |
659 | * passive mode, even in error case | |
660 | */ | |
661 | if (!acpi_processor_set_thermal_limit | |
662 | (passive->devices.handles[i], | |
663 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
664 | result = 0; | |
665 | /* | |
666 | * Leave cooling mode, even if the temp might | |
667 | * higher than trip point This is because some | |
668 | * machines might have long thermal polling | |
669 | * frequencies (tsp) defined. We will fall back | |
670 | * into passive mode in next cycle (probably quicker) | |
671 | */ | |
672 | if (result) { | |
673 | passive->flags.enabled = 0; | |
674 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
675 | "Disabling passive cooling, still above threshold," | |
676 | " but we are cooling down\n")); | |
677 | } | |
678 | } | |
679 | return; | |
1da177e4 LT |
680 | } |
681 | ||
682 | /* | |
683 | * Below Trip? | |
684 | * ----------- | |
685 | * Implement passive cooling hysteresis to slowly increase performance | |
686 | * and avoid thrashing around the passive trip point. Note that we | |
687 | * assume symmetry. | |
688 | */ | |
1cbf4c56 TR |
689 | if (!passive->flags.enabled) |
690 | return; | |
691 | for (i = 0; i < passive->devices.count; i++) | |
692 | if (!acpi_processor_set_thermal_limit | |
693 | (passive->devices.handles[i], | |
694 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
695 | result = 0; | |
696 | if (result) { | |
697 | passive->flags.enabled = 0; | |
698 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
699 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 700 | } |
1da177e4 LT |
701 | } |
702 | ||
1cbf4c56 | 703 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 704 | { |
4be44fcd | 705 | int result = 0; |
1da177e4 | 706 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
707 | int i = 0; |
708 | int j = 0; | |
709 | unsigned long maxtemp = 0; | |
1da177e4 | 710 | |
1da177e4 LT |
711 | |
712 | if (!tz) | |
1cbf4c56 | 713 | return; |
1da177e4 | 714 | |
4be44fcd | 715 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
716 | active = &(tz->trips.active[i]); |
717 | if (!active || !active->flags.valid) | |
718 | break; | |
1da177e4 | 719 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
720 | /* |
721 | * Above Threshold? | |
722 | * ---------------- | |
723 | * If not already enabled, turn ON all cooling devices | |
724 | * associated with this active threshold. | |
725 | */ | |
1da177e4 | 726 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
727 | tz->state.active_index = i; |
728 | maxtemp = active->temperature; | |
729 | if (active->flags.enabled) | |
730 | continue; | |
1da177e4 | 731 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
732 | result = |
733 | acpi_bus_set_power(active->devices. | |
734 | handles[j], | |
1cbf4c56 | 735 | ACPI_STATE_D0); |
1da177e4 | 736 | if (result) { |
cece9296 LB |
737 | printk(KERN_WARNING PREFIX |
738 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 739 | active->devices. |
cece9296 | 740 | handles[j]); |
1da177e4 LT |
741 | continue; |
742 | } | |
1cbf4c56 | 743 | active->flags.enabled = 1; |
4be44fcd | 744 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 745 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 746 | active->devices.handles[j])); |
1da177e4 | 747 | } |
1cbf4c56 TR |
748 | continue; |
749 | } | |
750 | if (!active->flags.enabled) | |
751 | continue; | |
752 | /* | |
753 | * Below Threshold? | |
754 | * ---------------- | |
755 | * Turn OFF all cooling devices associated with this | |
756 | * threshold. | |
757 | */ | |
758 | for (j = 0; j < active->devices.count; j++) { | |
759 | result = acpi_bus_set_power(active->devices.handles[j], | |
760 | ACPI_STATE_D3); | |
761 | if (result) { | |
cece9296 LB |
762 | printk(KERN_WARNING PREFIX |
763 | "Unable to turn cooling device [%p] 'off'\n", | |
764 | active->devices.handles[j]); | |
1cbf4c56 TR |
765 | continue; |
766 | } | |
767 | active->flags.enabled = 0; | |
768 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
769 | "Cooling device [%p] now 'off'\n", | |
770 | active->devices.handles[j])); | |
1da177e4 LT |
771 | } |
772 | } | |
1da177e4 LT |
773 | } |
774 | ||
4be44fcd | 775 | static void acpi_thermal_check(void *context); |
1da177e4 | 776 | |
4be44fcd | 777 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
778 | { |
779 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
780 | if (!tz->zombie) | |
b8d35192 | 781 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
782 | } |
783 | ||
ea51011a ZY |
784 | static void acpi_thermal_active_off(void *data) |
785 | { | |
786 | int result = 0; | |
787 | struct acpi_thermal *tz = data; | |
788 | int i = 0; | |
789 | int j = 0; | |
790 | struct acpi_thermal_active *active = NULL; | |
791 | ||
792 | if (!tz) { | |
793 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
794 | return; | |
795 | } | |
796 | ||
797 | result = acpi_thermal_get_temperature(tz); | |
798 | if (result) | |
799 | return; | |
800 | ||
801 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
802 | active = &(tz->trips.active[i]); | |
803 | if (!active || !active->flags.valid) | |
804 | break; | |
805 | if (tz->temperature >= active->temperature) { | |
806 | /* | |
807 | * If the thermal temperature is greater than the | |
808 | * active threshod, unnecessary to turn off the | |
809 | * the active cooling device. | |
810 | */ | |
811 | continue; | |
812 | } | |
813 | /* | |
814 | * Below Threshold? | |
815 | * ---------------- | |
816 | * Turn OFF all cooling devices associated with this | |
817 | * threshold. | |
818 | */ | |
819 | for (j = 0; j < active->devices.count; j++) | |
820 | result = acpi_bus_set_power(active->devices.handles[j], | |
821 | ACPI_STATE_D3); | |
822 | } | |
823 | } | |
824 | ||
4be44fcd | 825 | static void acpi_thermal_check(void *data) |
1da177e4 | 826 | { |
4be44fcd | 827 | int result = 0; |
50dd0969 | 828 | struct acpi_thermal *tz = data; |
4be44fcd | 829 | unsigned long sleep_time = 0; |
21bc42ab | 830 | unsigned long timeout_jiffies = 0; |
4be44fcd | 831 | int i = 0; |
1da177e4 LT |
832 | struct acpi_thermal_state state; |
833 | ||
1da177e4 LT |
834 | |
835 | if (!tz) { | |
6468463a | 836 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 837 | return; |
1da177e4 LT |
838 | } |
839 | ||
6e215785 AS |
840 | /* Check if someone else is already running */ |
841 | if (!mutex_trylock(&tz->lock)) | |
842 | return; | |
843 | ||
1da177e4 LT |
844 | state = tz->state; |
845 | ||
846 | result = acpi_thermal_get_temperature(tz); | |
847 | if (result) | |
6e215785 | 848 | goto unlock; |
4be44fcd | 849 | |
3f655ef8 ZR |
850 | if (!tz->tz_enabled) |
851 | goto unlock; | |
852 | ||
1da177e4 | 853 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 854 | |
1da177e4 LT |
855 | /* |
856 | * Check Trip Points | |
857 | * ----------------- | |
858 | * Compare the current temperature to the trip point values to see | |
859 | * if we've entered one of the thermal policy states. Note that | |
860 | * this function determines when a state is entered, but the | |
861 | * individual policy decides when it is exited (e.g. hysteresis). | |
862 | */ | |
863 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
864 | state.critical |= |
865 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
866 | if (tz->trips.hot.flags.valid) |
867 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
868 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
869 | state.passive |= |
870 | (tz->temperature >= tz->trips.passive.temperature); | |
871 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 872 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
873 | state.active |= |
874 | (tz->temperature >= | |
875 | tz->trips.active[i].temperature); | |
1da177e4 LT |
876 | |
877 | /* | |
878 | * Invoke Policy | |
879 | * ------------- | |
880 | * Separated from the above check to allow individual policy to | |
881 | * determine when to exit a given state. | |
882 | */ | |
883 | if (state.critical) | |
884 | acpi_thermal_critical(tz); | |
885 | if (state.hot) | |
886 | acpi_thermal_hot(tz); | |
887 | if (state.passive) | |
888 | acpi_thermal_passive(tz); | |
889 | if (state.active) | |
890 | acpi_thermal_active(tz); | |
891 | ||
892 | /* | |
893 | * Calculate State | |
894 | * --------------- | |
895 | * Again, separated from the above two to allow independent policy | |
896 | * decisions. | |
897 | */ | |
1cbf4c56 TR |
898 | tz->state.critical = tz->trips.critical.flags.enabled; |
899 | tz->state.hot = tz->trips.hot.flags.enabled; | |
900 | tz->state.passive = tz->trips.passive.flags.enabled; | |
901 | tz->state.active = 0; | |
4be44fcd | 902 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 903 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
904 | |
905 | /* | |
906 | * Calculate Sleep Time | |
907 | * -------------------- | |
908 | * If we're in the passive state, use _TSP's value. Otherwise | |
909 | * use the default polling frequency (e.g. _TZP). If no polling | |
910 | * frequency is specified then we'll wait forever (at least until | |
911 | * a thermal event occurs). Note that _TSP and _TZD values are | |
912 | * given in 1/10th seconds (we must covert to milliseconds). | |
913 | */ | |
21bc42ab | 914 | if (tz->state.passive) { |
1da177e4 | 915 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
916 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
917 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 918 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
919 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
920 | } | |
1da177e4 | 921 | |
4be44fcd LB |
922 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
923 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
924 | |
925 | /* | |
926 | * Schedule Next Poll | |
927 | * ------------------ | |
928 | */ | |
929 | if (!sleep_time) { | |
930 | if (timer_pending(&(tz->timer))) | |
931 | del_timer(&(tz->timer)); | |
4be44fcd | 932 | } else { |
1da177e4 | 933 | if (timer_pending(&(tz->timer))) |
21bc42ab | 934 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 935 | else { |
4be44fcd | 936 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 937 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 938 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
939 | add_timer(&(tz->timer)); |
940 | } | |
941 | } | |
6e215785 AS |
942 | unlock: |
943 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
944 | } |
945 | ||
3f655ef8 | 946 | /* sys I/F for generic thermal sysfs support */ |
5e012760 ZR |
947 | #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200) |
948 | ||
3f655ef8 ZR |
949 | static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) |
950 | { | |
951 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 952 | int result; |
3f655ef8 ZR |
953 | |
954 | if (!tz) | |
955 | return -EINVAL; | |
956 | ||
76ecb4f2 ZR |
957 | result = acpi_thermal_get_temperature(tz); |
958 | if (result) | |
959 | return result; | |
960 | ||
5e012760 | 961 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature)); |
3f655ef8 ZR |
962 | } |
963 | ||
964 | static const char enabled[] = "kernel"; | |
965 | static const char disabled[] = "user"; | |
966 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
967 | char *buf) | |
968 | { | |
969 | struct acpi_thermal *tz = thermal->devdata; | |
970 | ||
971 | if (!tz) | |
972 | return -EINVAL; | |
973 | ||
974 | return sprintf(buf, "%s\n", tz->tz_enabled ? | |
975 | enabled : disabled); | |
976 | } | |
977 | ||
978 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
979 | const char *buf) | |
980 | { | |
981 | struct acpi_thermal *tz = thermal->devdata; | |
982 | int enable; | |
983 | ||
984 | if (!tz) | |
985 | return -EINVAL; | |
986 | ||
987 | /* | |
988 | * enable/disable thermal management from ACPI thermal driver | |
989 | */ | |
990 | if (!strncmp(buf, enabled, sizeof enabled - 1)) | |
991 | enable = 1; | |
992 | else if (!strncmp(buf, disabled, sizeof disabled - 1)) | |
993 | enable = 0; | |
994 | else | |
995 | return -EINVAL; | |
996 | ||
997 | if (enable != tz->tz_enabled) { | |
998 | tz->tz_enabled = enable; | |
999 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1000 | "%s ACPI thermal control\n", | |
1001 | tz->tz_enabled ? enabled : disabled)); | |
1002 | acpi_thermal_check(tz); | |
1003 | } | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
1008 | int trip, char *buf) | |
1009 | { | |
1010 | struct acpi_thermal *tz = thermal->devdata; | |
1011 | int i; | |
1012 | ||
1013 | if (!tz || trip < 0) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | if (tz->trips.critical.flags.valid) { | |
1017 | if (!trip) | |
1018 | return sprintf(buf, "critical\n"); | |
1019 | trip--; | |
1020 | } | |
1021 | ||
1022 | if (tz->trips.hot.flags.valid) { | |
1023 | if (!trip) | |
1024 | return sprintf(buf, "hot\n"); | |
1025 | trip--; | |
1026 | } | |
1027 | ||
1028 | if (tz->trips.passive.flags.valid) { | |
1029 | if (!trip) | |
1030 | return sprintf(buf, "passive\n"); | |
1031 | trip--; | |
1032 | } | |
1033 | ||
1034 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1035 | tz->trips.active[i].flags.valid; i++) { | |
1036 | if (!trip) | |
1037 | return sprintf(buf, "active%d\n", i); | |
1038 | trip--; | |
1039 | } | |
1040 | ||
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
1045 | int trip, char *buf) | |
1046 | { | |
1047 | struct acpi_thermal *tz = thermal->devdata; | |
1048 | int i; | |
1049 | ||
1050 | if (!tz || trip < 0) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | if (tz->trips.critical.flags.valid) { | |
1054 | if (!trip) | |
5e012760 | 1055 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1056 | tz->trips.critical.temperature)); |
1057 | trip--; | |
1058 | } | |
1059 | ||
1060 | if (tz->trips.hot.flags.valid) { | |
1061 | if (!trip) | |
5e012760 | 1062 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1063 | tz->trips.hot.temperature)); |
1064 | trip--; | |
1065 | } | |
1066 | ||
1067 | if (tz->trips.passive.flags.valid) { | |
1068 | if (!trip) | |
5e012760 | 1069 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1070 | tz->trips.passive.temperature)); |
1071 | trip--; | |
1072 | } | |
1073 | ||
1074 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1075 | tz->trips.active[i].flags.valid; i++) { | |
1076 | if (!trip) | |
5e012760 | 1077 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1078 | tz->trips.active[i].temperature)); |
1079 | trip--; | |
1080 | } | |
1081 | ||
1082 | return -EINVAL; | |
1083 | } | |
1084 | ||
9ec732ff ZR |
1085 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
1086 | unsigned long *temperature) { | |
1087 | struct acpi_thermal *tz = thermal->devdata; | |
1088 | ||
1089 | if (tz->trips.critical.flags.valid) { | |
1090 | *temperature = KELVIN_TO_MILLICELSIUS( | |
1091 | tz->trips.critical.temperature); | |
1092 | return 0; | |
1093 | } else | |
1094 | return -EINVAL; | |
1095 | } | |
1096 | ||
3f655ef8 ZR |
1097 | typedef int (*cb)(struct thermal_zone_device *, int, |
1098 | struct thermal_cooling_device *); | |
1099 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
1100 | struct thermal_cooling_device *cdev, | |
1101 | cb action) | |
1102 | { | |
1103 | struct acpi_device *device = cdev->devdata; | |
1104 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
1105 | struct acpi_device *dev; |
1106 | acpi_status status; | |
1107 | acpi_handle handle; | |
3f655ef8 ZR |
1108 | int i; |
1109 | int j; | |
1110 | int trip = -1; | |
1111 | int result = 0; | |
1112 | ||
1113 | if (tz->trips.critical.flags.valid) | |
1114 | trip++; | |
1115 | ||
1116 | if (tz->trips.hot.flags.valid) | |
1117 | trip++; | |
1118 | ||
1119 | if (tz->trips.passive.flags.valid) { | |
1120 | trip++; | |
1121 | for (i = 0; i < tz->trips.passive.devices.count; | |
1122 | i++) { | |
653a00c9 ZR |
1123 | handle = tz->trips.passive.devices.handles[i]; |
1124 | status = acpi_bus_get_device(handle, &dev); | |
1125 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1126 | result = action(thermal, trip, cdev); | |
1127 | if (result) | |
1128 | goto failed; | |
1129 | } | |
3f655ef8 ZR |
1130 | } |
1131 | } | |
1132 | ||
1133 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1134 | if (!tz->trips.active[i].flags.valid) | |
1135 | break; | |
1136 | trip++; | |
1137 | for (j = 0; | |
1138 | j < tz->trips.active[i].devices.count; | |
1139 | j++) { | |
653a00c9 ZR |
1140 | handle = tz->trips.active[i].devices.handles[j]; |
1141 | status = acpi_bus_get_device(handle, &dev); | |
1142 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1143 | result = action(thermal, trip, cdev); | |
1144 | if (result) | |
1145 | goto failed; | |
1146 | } | |
3f655ef8 ZR |
1147 | } |
1148 | } | |
1149 | ||
1150 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
1151 | handle = tz->devices.handles[i]; |
1152 | status = acpi_bus_get_device(handle, &dev); | |
1153 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1154 | result = action(thermal, -1, cdev); | |
1155 | if (result) | |
1156 | goto failed; | |
1157 | } | |
3f655ef8 ZR |
1158 | } |
1159 | ||
1160 | failed: | |
1161 | return result; | |
1162 | } | |
1163 | ||
1164 | static int | |
1165 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
1166 | struct thermal_cooling_device *cdev) | |
1167 | { | |
1168 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1169 | thermal_zone_bind_cooling_device); | |
1170 | } | |
1171 | ||
1172 | static int | |
1173 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
1174 | struct thermal_cooling_device *cdev) | |
1175 | { | |
1176 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1177 | thermal_zone_unbind_cooling_device); | |
1178 | } | |
1179 | ||
1180 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
1181 | .bind = acpi_thermal_bind_cooling_device, | |
1182 | .unbind = acpi_thermal_unbind_cooling_device, | |
1183 | .get_temp = thermal_get_temp, | |
1184 | .get_mode = thermal_get_mode, | |
1185 | .set_mode = thermal_set_mode, | |
1186 | .get_trip_type = thermal_get_trip_type, | |
1187 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 1188 | .get_crit_temp = thermal_get_crit_temp, |
3f655ef8 ZR |
1189 | }; |
1190 | ||
1191 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
1192 | { | |
1193 | int trips = 0; | |
1194 | int result; | |
20733939 | 1195 | acpi_status status; |
3f655ef8 ZR |
1196 | int i; |
1197 | ||
1198 | if (tz->trips.critical.flags.valid) | |
1199 | trips++; | |
1200 | ||
1201 | if (tz->trips.hot.flags.valid) | |
1202 | trips++; | |
1203 | ||
1204 | if (tz->trips.passive.flags.valid) | |
1205 | trips++; | |
1206 | ||
1207 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1208 | tz->trips.active[i].flags.valid; i++, trips++); | |
e9ae7107 | 1209 | tz->thermal_zone = thermal_zone_device_register("acpitz", |
3f655ef8 | 1210 | trips, tz, &acpi_thermal_zone_ops); |
bb070e43 | 1211 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
1212 | return -ENODEV; |
1213 | ||
1214 | result = sysfs_create_link(&tz->device->dev.kobj, | |
1215 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
1216 | if (result) | |
1217 | return result; | |
1218 | ||
1219 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
1220 | &tz->device->dev.kobj, "device"); | |
1221 | if (result) | |
1222 | return result; | |
1223 | ||
20733939 ZR |
1224 | status = acpi_attach_data(tz->device->handle, |
1225 | acpi_bus_private_data_handler, | |
1226 | tz->thermal_zone); | |
1227 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
1228 | printk(KERN_ERR PREFIX |
1229 | "Error attaching device data\n"); | |
20733939 ZR |
1230 | return -ENODEV; |
1231 | } | |
1232 | ||
3f655ef8 ZR |
1233 | tz->tz_enabled = 1; |
1234 | ||
fc3a8828 GKH |
1235 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
1236 | tz->thermal_zone->id); | |
3f655ef8 ZR |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
1241 | { | |
1242 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
1243 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
1244 | thermal_zone_device_unregister(tz->thermal_zone); | |
1245 | tz->thermal_zone = NULL; | |
20733939 | 1246 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
1247 | } |
1248 | ||
1249 | ||
1da177e4 LT |
1250 | /* -------------------------------------------------------------------------- |
1251 | FS Interface (/proc) | |
1252 | -------------------------------------------------------------------------- */ | |
1253 | ||
4be44fcd | 1254 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
1255 | |
1256 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
1257 | { | |
50dd0969 | 1258 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1259 | |
1da177e4 LT |
1260 | |
1261 | if (!tz) | |
1262 | goto end; | |
1263 | ||
1264 | seq_puts(seq, "state: "); | |
1265 | ||
4be44fcd LB |
1266 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
1267 | && !tz->state.active) | |
1da177e4 LT |
1268 | seq_puts(seq, "ok\n"); |
1269 | else { | |
1270 | if (tz->state.critical) | |
1271 | seq_puts(seq, "critical "); | |
1272 | if (tz->state.hot) | |
1273 | seq_puts(seq, "hot "); | |
1274 | if (tz->state.passive) | |
1275 | seq_puts(seq, "passive "); | |
1276 | if (tz->state.active) | |
1277 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1278 | seq_puts(seq, "\n"); | |
1279 | } | |
1280 | ||
4be44fcd | 1281 | end: |
d550d98d | 1282 | return 0; |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1286 | { | |
1287 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1288 | } | |
1289 | ||
1da177e4 LT |
1290 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1291 | { | |
4be44fcd | 1292 | int result = 0; |
50dd0969 | 1293 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1294 | |
1da177e4 LT |
1295 | |
1296 | if (!tz) | |
1297 | goto end; | |
1298 | ||
1299 | result = acpi_thermal_get_temperature(tz); | |
1300 | if (result) | |
1301 | goto end; | |
1302 | ||
4be44fcd LB |
1303 | seq_printf(seq, "temperature: %ld C\n", |
1304 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1305 | |
4be44fcd | 1306 | end: |
d550d98d | 1307 | return 0; |
1da177e4 LT |
1308 | } |
1309 | ||
1310 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1311 | { | |
1312 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1313 | } | |
1314 | ||
1da177e4 LT |
1315 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1316 | { | |
50dd0969 | 1317 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1318 | struct acpi_device *device; |
e7c746ef TR |
1319 | acpi_status status; |
1320 | ||
4be44fcd LB |
1321 | int i = 0; |
1322 | int j = 0; | |
1da177e4 | 1323 | |
1da177e4 LT |
1324 | |
1325 | if (!tz) | |
1326 | goto end; | |
1327 | ||
1328 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1329 | seq_printf(seq, "critical (S5): %ld C%s", |
1330 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1331 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1332 | |
1333 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1334 | seq_printf(seq, "hot (S4): %ld C%s", |
1335 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1336 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1337 | |
1338 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1339 | seq_printf(seq, |
1340 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1341 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1342 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1343 | tz->trips.passive.tsp); | |
1344 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1345 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1346 | handles[j], &device); | |
1347 | seq_printf(seq, "%4.4s ", status ? "" : | |
1348 | acpi_device_bid(device)); | |
1da177e4 LT |
1349 | } |
1350 | seq_puts(seq, "\n"); | |
1351 | } | |
1352 | ||
1353 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1354 | if (!(tz->trips.active[i].flags.valid)) | |
1355 | break; | |
1356 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1357 | i, |
1358 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1359 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1360 | status = acpi_bus_get_device(tz->trips.active[i]. |
1361 | devices.handles[j], | |
1362 | &device); | |
1363 | seq_printf(seq, "%4.4s ", status ? "" : | |
1364 | acpi_device_bid(device)); | |
68ccfaa8 | 1365 | } |
1da177e4 LT |
1366 | seq_puts(seq, "\n"); |
1367 | } | |
1368 | ||
4be44fcd | 1369 | end: |
d550d98d | 1370 | return 0; |
1da177e4 LT |
1371 | } |
1372 | ||
1373 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1374 | { | |
1375 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1376 | } | |
1377 | ||
1da177e4 LT |
1378 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1379 | { | |
50dd0969 | 1380 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1381 | |
1da177e4 LT |
1382 | |
1383 | if (!tz) | |
1384 | goto end; | |
1385 | ||
eaca2d3f | 1386 | if (!tz->flags.cooling_mode) |
1da177e4 | 1387 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1388 | else |
eaca2d3f | 1389 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1390 | |
4be44fcd | 1391 | end: |
d550d98d | 1392 | return 0; |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1396 | { | |
1397 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1398 | PDE(inode)->data); |
1da177e4 LT |
1399 | } |
1400 | ||
1401 | static ssize_t | |
4be44fcd LB |
1402 | acpi_thermal_write_cooling_mode(struct file *file, |
1403 | const char __user * buffer, | |
1404 | size_t count, loff_t * ppos) | |
1da177e4 | 1405 | { |
50dd0969 JE |
1406 | struct seq_file *m = file->private_data; |
1407 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1408 | int result = 0; |
1409 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1410 | |
1da177e4 LT |
1411 | |
1412 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1413 | return -EINVAL; |
1da177e4 LT |
1414 | |
1415 | if (!tz->flags.cooling_mode) | |
d550d98d | 1416 | return -ENODEV; |
1da177e4 LT |
1417 | |
1418 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1419 | return -EFAULT; |
4be44fcd | 1420 | |
1da177e4 | 1421 | mode_string[count] = '\0'; |
4be44fcd LB |
1422 | |
1423 | result = acpi_thermal_set_cooling_mode(tz, | |
1424 | simple_strtoul(mode_string, NULL, | |
1425 | 0)); | |
1da177e4 | 1426 | if (result) |
d550d98d | 1427 | return result; |
1da177e4 LT |
1428 | |
1429 | acpi_thermal_check(tz); | |
1430 | ||
d550d98d | 1431 | return count; |
1da177e4 LT |
1432 | } |
1433 | ||
1da177e4 LT |
1434 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1435 | { | |
50dd0969 | 1436 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1437 | |
1da177e4 LT |
1438 | |
1439 | if (!tz) | |
1440 | goto end; | |
1441 | ||
1442 | if (!tz->polling_frequency) { | |
1443 | seq_puts(seq, "<polling disabled>\n"); | |
1444 | goto end; | |
1445 | } | |
1446 | ||
1447 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1448 | (tz->polling_frequency / 10)); |
1da177e4 | 1449 | |
4be44fcd | 1450 | end: |
d550d98d | 1451 | return 0; |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1455 | { | |
1456 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1457 | PDE(inode)->data); |
1da177e4 LT |
1458 | } |
1459 | ||
1460 | static ssize_t | |
4be44fcd LB |
1461 | acpi_thermal_write_polling(struct file *file, |
1462 | const char __user * buffer, | |
1463 | size_t count, loff_t * ppos) | |
1da177e4 | 1464 | { |
50dd0969 JE |
1465 | struct seq_file *m = file->private_data; |
1466 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1467 | int result = 0; |
1468 | char polling_string[12] = { '\0' }; | |
1469 | int seconds = 0; | |
1da177e4 | 1470 | |
1da177e4 LT |
1471 | |
1472 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1473 | return -EINVAL; |
4be44fcd | 1474 | |
1da177e4 | 1475 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1476 | return -EFAULT; |
4be44fcd | 1477 | |
1da177e4 LT |
1478 | polling_string[count] = '\0'; |
1479 | ||
1480 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1481 | |
1da177e4 LT |
1482 | result = acpi_thermal_set_polling(tz, seconds); |
1483 | if (result) | |
d550d98d | 1484 | return result; |
1da177e4 LT |
1485 | |
1486 | acpi_thermal_check(tz); | |
1487 | ||
d550d98d | 1488 | return count; |
1da177e4 LT |
1489 | } |
1490 | ||
4be44fcd | 1491 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1492 | { |
4be44fcd | 1493 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1494 | |
1da177e4 LT |
1495 | |
1496 | if (!acpi_device_dir(device)) { | |
1497 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1498 | acpi_thermal_dir); |
1da177e4 | 1499 | if (!acpi_device_dir(device)) |
d550d98d | 1500 | return -ENODEV; |
1da177e4 LT |
1501 | acpi_device_dir(device)->owner = THIS_MODULE; |
1502 | } | |
1503 | ||
1504 | /* 'state' [R] */ | |
cf7acfab DL |
1505 | entry = proc_create_data(ACPI_THERMAL_FILE_STATE, |
1506 | S_IRUGO, acpi_device_dir(device), | |
1507 | &acpi_thermal_state_fops, | |
1508 | acpi_driver_data(device)); | |
1da177e4 | 1509 | if (!entry) |
d550d98d | 1510 | return -ENODEV; |
1da177e4 LT |
1511 | |
1512 | /* 'temperature' [R] */ | |
cf7acfab DL |
1513 | entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, |
1514 | S_IRUGO, acpi_device_dir(device), | |
1515 | &acpi_thermal_temp_fops, | |
1516 | acpi_driver_data(device)); | |
1da177e4 | 1517 | if (!entry) |
d550d98d | 1518 | return -ENODEV; |
1da177e4 | 1519 | |
2db9ccba | 1520 | /* 'trip_points' [R] */ |
cf7acfab DL |
1521 | entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, |
1522 | S_IRUGO, | |
1523 | acpi_device_dir(device), | |
1524 | &acpi_thermal_trip_fops, | |
1525 | acpi_driver_data(device)); | |
1da177e4 | 1526 | if (!entry) |
d550d98d | 1527 | return -ENODEV; |
1da177e4 LT |
1528 | |
1529 | /* 'cooling_mode' [R/W] */ | |
cf7acfab DL |
1530 | entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, |
1531 | S_IFREG | S_IRUGO | S_IWUSR, | |
1532 | acpi_device_dir(device), | |
1533 | &acpi_thermal_cooling_fops, | |
1534 | acpi_driver_data(device)); | |
1da177e4 | 1535 | if (!entry) |
d550d98d | 1536 | return -ENODEV; |
1da177e4 LT |
1537 | |
1538 | /* 'polling_frequency' [R/W] */ | |
cf7acfab DL |
1539 | entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, |
1540 | S_IFREG | S_IRUGO | S_IWUSR, | |
1541 | acpi_device_dir(device), | |
1542 | &acpi_thermal_polling_fops, | |
1543 | acpi_driver_data(device)); | |
1da177e4 | 1544 | if (!entry) |
d550d98d | 1545 | return -ENODEV; |
d550d98d | 1546 | return 0; |
1da177e4 LT |
1547 | } |
1548 | ||
4be44fcd | 1549 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1550 | { |
1da177e4 LT |
1551 | |
1552 | if (acpi_device_dir(device)) { | |
1553 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1554 | acpi_device_dir(device)); | |
1555 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1556 | acpi_device_dir(device)); | |
1557 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1558 | acpi_device_dir(device)); | |
1559 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1560 | acpi_device_dir(device)); | |
1561 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1562 | acpi_device_dir(device)); | |
1563 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1564 | acpi_device_dir(device) = NULL; | |
1565 | } | |
1566 | ||
d550d98d | 1567 | return 0; |
1da177e4 LT |
1568 | } |
1569 | ||
1da177e4 LT |
1570 | /* -------------------------------------------------------------------------- |
1571 | Driver Interface | |
1572 | -------------------------------------------------------------------------- */ | |
1573 | ||
4be44fcd | 1574 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1575 | { |
50dd0969 | 1576 | struct acpi_thermal *tz = data; |
4be44fcd | 1577 | struct acpi_device *device = NULL; |
1da177e4 | 1578 | |
1da177e4 LT |
1579 | |
1580 | if (!tz) | |
d550d98d | 1581 | return; |
1da177e4 | 1582 | |
8348e1b1 | 1583 | device = tz->device; |
1da177e4 LT |
1584 | |
1585 | switch (event) { | |
1586 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1587 | acpi_thermal_check(tz); | |
1588 | break; | |
1589 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1590 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1591 | acpi_thermal_check(tz); |
14e04fb3 | 1592 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 1593 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1594 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
1595 | break; |
1596 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1597 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1598 | acpi_thermal_check(tz); | |
14e04fb3 | 1599 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 1600 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1601 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
1602 | break; |
1603 | default: | |
1604 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1605 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1606 | break; |
1607 | } | |
1608 | ||
d550d98d | 1609 | return; |
1da177e4 LT |
1610 | } |
1611 | ||
4be44fcd | 1612 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1613 | { |
4be44fcd | 1614 | int result = 0; |
1da177e4 | 1615 | |
1da177e4 LT |
1616 | |
1617 | if (!tz) | |
d550d98d | 1618 | return -EINVAL; |
1da177e4 LT |
1619 | |
1620 | /* Get temperature [_TMP] (required) */ | |
1621 | result = acpi_thermal_get_temperature(tz); | |
1622 | if (result) | |
d550d98d | 1623 | return result; |
1da177e4 LT |
1624 | |
1625 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1626 | result = acpi_thermal_get_trip_points(tz); | |
1627 | if (result) | |
d550d98d | 1628 | return result; |
1da177e4 LT |
1629 | |
1630 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1631 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1632 | if (!result) |
1da177e4 | 1633 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1634 | |
1635 | /* Get default polling frequency [_TZP] (optional) */ | |
1636 | if (tzp) | |
1637 | tz->polling_frequency = tzp; | |
1638 | else | |
1639 | acpi_thermal_get_polling_frequency(tz); | |
1640 | ||
d550d98d | 1641 | return 0; |
1da177e4 LT |
1642 | } |
1643 | ||
4be44fcd | 1644 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1645 | { |
4be44fcd LB |
1646 | int result = 0; |
1647 | acpi_status status = AE_OK; | |
1648 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1649 | |
1da177e4 LT |
1650 | |
1651 | if (!device) | |
d550d98d | 1652 | return -EINVAL; |
1da177e4 | 1653 | |
36bcbec7 | 1654 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1655 | if (!tz) |
d550d98d | 1656 | return -ENOMEM; |
1da177e4 | 1657 | |
8348e1b1 | 1658 | tz->device = device; |
1da177e4 LT |
1659 | strcpy(tz->name, device->pnp.bus_id); |
1660 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1661 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1662 | device->driver_data = tz; |
6e215785 | 1663 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1664 | |
1665 | ||
1da177e4 LT |
1666 | result = acpi_thermal_get_info(tz); |
1667 | if (result) | |
3f655ef8 ZR |
1668 | goto free_memory; |
1669 | ||
1670 | result = acpi_thermal_register_thermal_zone(tz); | |
1671 | if (result) | |
1672 | goto free_memory; | |
1da177e4 LT |
1673 | |
1674 | result = acpi_thermal_add_fs(device); | |
1675 | if (result) | |
3f655ef8 | 1676 | goto unregister_thermal_zone; |
1da177e4 LT |
1677 | |
1678 | init_timer(&tz->timer); | |
1679 | ||
ea51011a ZY |
1680 | acpi_thermal_active_off(tz); |
1681 | ||
1da177e4 LT |
1682 | acpi_thermal_check(tz); |
1683 | ||
38ba7c9e | 1684 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1685 | ACPI_DEVICE_NOTIFY, |
1686 | acpi_thermal_notify, tz); | |
1da177e4 | 1687 | if (ACPI_FAILURE(status)) { |
1da177e4 | 1688 | result = -ENODEV; |
3f655ef8 | 1689 | goto remove_fs; |
1da177e4 LT |
1690 | } |
1691 | ||
1692 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1693 | acpi_device_name(device), acpi_device_bid(device), |
1694 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1695 | goto end; |
1da177e4 | 1696 | |
3f655ef8 ZR |
1697 | remove_fs: |
1698 | acpi_thermal_remove_fs(device); | |
1699 | unregister_thermal_zone: | |
1700 | thermal_zone_device_unregister(tz->thermal_zone); | |
1701 | free_memory: | |
1702 | kfree(tz); | |
1703 | end: | |
d550d98d | 1704 | return result; |
1da177e4 LT |
1705 | } |
1706 | ||
4be44fcd | 1707 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1708 | { |
4be44fcd LB |
1709 | acpi_status status = AE_OK; |
1710 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1711 | |
1da177e4 LT |
1712 | |
1713 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1714 | return -EINVAL; |
1da177e4 | 1715 | |
50dd0969 | 1716 | tz = acpi_driver_data(device); |
1da177e4 LT |
1717 | |
1718 | /* avoid timer adding new defer task */ | |
1719 | tz->zombie = 1; | |
1720 | /* wait for running timer (on other CPUs) finish */ | |
1721 | del_timer_sync(&(tz->timer)); | |
1722 | /* synchronize deferred task */ | |
1723 | acpi_os_wait_events_complete(NULL); | |
1724 | /* deferred task may reinsert timer */ | |
1725 | del_timer_sync(&(tz->timer)); | |
1726 | ||
38ba7c9e | 1727 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1728 | ACPI_DEVICE_NOTIFY, |
1729 | acpi_thermal_notify); | |
1da177e4 LT |
1730 | |
1731 | /* Terminate policy */ | |
4be44fcd | 1732 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1733 | tz->trips.passive.flags.enabled = 0; |
1734 | acpi_thermal_passive(tz); | |
1735 | } | |
1736 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1737 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1738 | tz->trips.active[0].flags.enabled = 0; |
1739 | acpi_thermal_active(tz); | |
1740 | } | |
1741 | ||
1742 | acpi_thermal_remove_fs(device); | |
3f655ef8 | 1743 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1744 | mutex_destroy(&tz->lock); |
1da177e4 | 1745 | kfree(tz); |
d550d98d | 1746 | return 0; |
1da177e4 LT |
1747 | } |
1748 | ||
5d9464a4 | 1749 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1750 | { |
1751 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1752 | int i, j, power_state, result; |
1753 | ||
74ce1468 KK |
1754 | |
1755 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1756 | return -EINVAL; |
74ce1468 | 1757 | |
50dd0969 | 1758 | tz = acpi_driver_data(device); |
74ce1468 | 1759 | |
bed936f7 | 1760 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1761 | if (!(&tz->trips.active[i])) |
1762 | break; | |
1763 | if (!tz->trips.active[i].flags.valid) | |
1764 | break; | |
1765 | tz->trips.active[i].flags.enabled = 1; | |
1766 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1767 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1768 | handles[j], &power_state); | |
1769 | if (result || (power_state != ACPI_STATE_D0)) { | |
1770 | tz->trips.active[i].flags.enabled = 0; | |
1771 | break; | |
1772 | } | |
bed936f7 | 1773 | } |
b1028c54 | 1774 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1775 | } |
1776 | ||
b1028c54 | 1777 | acpi_thermal_check(tz); |
74ce1468 KK |
1778 | |
1779 | return AE_OK; | |
1780 | } | |
1781 | ||
1855256c | 1782 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1783 | |
1784 | if (act == 0) { | |
1785 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1786 | "disabling all active thermal trip points\n", d->ident); | |
1787 | act = -1; | |
1788 | } | |
1789 | return 0; | |
1790 | } | |
1855256c | 1791 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1792 | |
1793 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1794 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1795 | nocrt = 1; | |
1796 | return 0; | |
1797 | } | |
1855256c | 1798 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1799 | |
1800 | if (tzp == 0) { | |
1801 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1802 | "enabling thermal zone polling\n", d->ident); | |
1803 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1804 | } | |
1805 | return 0; | |
1806 | } | |
1855256c | 1807 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1808 | |
1809 | if (psv == 0) { | |
1810 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1811 | "disabling all passive thermal trip points\n", d->ident); | |
1812 | psv = -1; | |
1813 | } | |
1814 | return 0; | |
1815 | } | |
1816 | ||
1817 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1818 | /* | |
1819 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1820 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1821 | */ | |
1822 | { | |
1823 | .callback = thermal_act, | |
1824 | .ident = "AOpen i915GMm-HFS", | |
1825 | .matches = { | |
1826 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1827 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1828 | }, | |
1829 | }, | |
1830 | { | |
1831 | .callback = thermal_psv, | |
1832 | .ident = "AOpen i915GMm-HFS", | |
1833 | .matches = { | |
1834 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1835 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1836 | }, | |
1837 | }, | |
1838 | { | |
1839 | .callback = thermal_tzp, | |
1840 | .ident = "AOpen i915GMm-HFS", | |
1841 | .matches = { | |
1842 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1843 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1844 | }, | |
1845 | }, | |
8c99fdce LB |
1846 | { |
1847 | .callback = thermal_nocrt, | |
1848 | .ident = "Gigabyte GA-7ZX", | |
1849 | .matches = { | |
1850 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1851 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1852 | }, | |
1853 | }, | |
0b5bfa1c LB |
1854 | {} |
1855 | }; | |
0b5bfa1c | 1856 | |
4be44fcd | 1857 | static int __init acpi_thermal_init(void) |
1da177e4 | 1858 | { |
4be44fcd | 1859 | int result = 0; |
1da177e4 | 1860 | |
0b5bfa1c LB |
1861 | dmi_check_system(thermal_dmi_table); |
1862 | ||
72b33ef8 LB |
1863 | if (off) { |
1864 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1865 | return -ENODEV; | |
1866 | } | |
1da177e4 LT |
1867 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1868 | if (!acpi_thermal_dir) | |
d550d98d | 1869 | return -ENODEV; |
1da177e4 LT |
1870 | acpi_thermal_dir->owner = THIS_MODULE; |
1871 | ||
1872 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1873 | if (result < 0) { | |
1874 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1875 | return -ENODEV; |
1da177e4 LT |
1876 | } |
1877 | ||
d550d98d | 1878 | return 0; |
1da177e4 LT |
1879 | } |
1880 | ||
4be44fcd | 1881 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1882 | { |
1da177e4 LT |
1883 | |
1884 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1885 | ||
1886 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1887 | ||
d550d98d | 1888 | return; |
1da177e4 LT |
1889 | } |
1890 | ||
1da177e4 LT |
1891 | module_init(acpi_thermal_init); |
1892 | module_exit(acpi_thermal_exit); |