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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; |
27663c58 | 249 | unsigned long long tmp; |
1da177e4 LT |
250 | |
251 | if (!tz) | |
d550d98d | 252 | return -EINVAL; |
1da177e4 LT |
253 | |
254 | tz->last_temperature = tz->temperature; | |
255 | ||
27663c58 | 256 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 257 | if (ACPI_FAILURE(status)) |
d550d98d | 258 | return -ENODEV; |
1da177e4 | 259 | |
27663c58 | 260 | tz->temperature = tmp; |
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; |
27663c58 | 270 | unsigned long long tmp; |
1da177e4 LT |
271 | |
272 | if (!tz) | |
d550d98d | 273 | return -EINVAL; |
1da177e4 | 274 | |
27663c58 | 275 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 276 | if (ACPI_FAILURE(status)) |
d550d98d | 277 | return -ENODEV; |
1da177e4 | 278 | |
27663c58 | 279 | tz->polling_frequency = tmp; |
4be44fcd LB |
280 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
281 | tz->polling_frequency)); | |
1da177e4 | 282 | |
d550d98d | 283 | return 0; |
1da177e4 LT |
284 | } |
285 | ||
4be44fcd | 286 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 287 | { |
1da177e4 LT |
288 | |
289 | if (!tz) | |
d550d98d | 290 | return -EINVAL; |
1da177e4 LT |
291 | |
292 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
293 | ||
4be44fcd LB |
294 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
295 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 296 | tz->polling_frequency/10)); |
1da177e4 | 297 | |
d550d98d | 298 | return 0; |
1da177e4 LT |
299 | } |
300 | ||
4be44fcd | 301 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 302 | { |
4be44fcd LB |
303 | acpi_status status = AE_OK; |
304 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
305 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
306 | acpi_handle handle = NULL; | |
1da177e4 | 307 | |
1da177e4 LT |
308 | |
309 | if (!tz) | |
d550d98d | 310 | return -EINVAL; |
1da177e4 | 311 | |
38ba7c9e | 312 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
313 | if (ACPI_FAILURE(status)) { |
314 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 315 | return -ENODEV; |
1da177e4 LT |
316 | } |
317 | ||
318 | arg0.integer.value = mode; | |
319 | ||
320 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
321 | if (ACPI_FAILURE(status)) | |
d550d98d | 322 | return -ENODEV; |
1da177e4 | 323 | |
d550d98d | 324 | return 0; |
1da177e4 LT |
325 | } |
326 | ||
ce44e197 ZR |
327 | #define ACPI_TRIPS_CRITICAL 0x01 |
328 | #define ACPI_TRIPS_HOT 0x02 | |
329 | #define ACPI_TRIPS_PASSIVE 0x04 | |
330 | #define ACPI_TRIPS_ACTIVE 0x08 | |
331 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 332 | |
ce44e197 ZR |
333 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
334 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 335 | |
ce44e197 ZR |
336 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
337 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
338 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 339 | |
ce44e197 ZR |
340 | /* |
341 | * This exception is thrown out in two cases: | |
342 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
343 | * when re-evaluating the AML code. | |
344 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
345 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
346 | */ | |
347 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
348 | do { \ | |
349 | if (flags != ACPI_TRIPS_INIT) \ | |
350 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
351 | "ACPI thermal trip point %s changed\n" \ | |
352 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
353 | } while (0) | |
354 | ||
355 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
356 | { | |
357 | acpi_status status = AE_OK; | |
27663c58 | 358 | unsigned long long tmp; |
ce44e197 ZR |
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, | |
27663c58 MW |
366 | "_CRT", NULL, &tmp); |
367 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
368 | /* |
369 | * Treat freezing temperatures as invalid as well; some | |
370 | * BIOSes return really low values and cause reboots at startup. | |
371 | * Below zero (Celcius) values clearly aren't right for sure.. | |
372 | * ... so lets discard those as invalid. | |
373 | */ | |
374 | if (ACPI_FAILURE(status) || | |
375 | tz->trips.critical.temperature <= 2732) { | |
c52a7419 | 376 | tz->trips.critical.flags.valid = 0; |
ce44e197 | 377 | ACPI_EXCEPTION((AE_INFO, status, |
a39a2d7c | 378 | "No or invalid critical threshold")); |
ce44e197 ZR |
379 | return -ENODEV; |
380 | } else { | |
381 | tz->trips.critical.flags.valid = 1; | |
382 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
383 | "Found critical threshold [%lu]\n", | |
384 | tz->trips.critical.temperature)); | |
385 | } | |
386 | if (tz->trips.critical.flags.valid == 1) { | |
387 | if (crt == -1) { | |
388 | tz->trips.critical.flags.valid = 0; | |
389 | } else if (crt > 0) { | |
390 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
391 | /* | |
22a94d79 | 392 | * Allow override critical threshold |
ce44e197 | 393 | */ |
22a94d79 ZR |
394 | if (crt_k > tz->trips.critical.temperature) |
395 | printk(KERN_WARNING PREFIX | |
396 | "Critical threshold %d C\n", crt); | |
397 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 398 | } |
c52a7419 LB |
399 | } |
400 | } | |
401 | ||
1da177e4 | 402 | /* Critical Sleep (optional) */ |
ce44e197 | 403 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 404 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 405 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
406 | if (ACPI_FAILURE(status)) { |
407 | tz->trips.hot.flags.valid = 0; | |
408 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
409 | "No hot threshold\n")); | |
410 | } else { | |
27663c58 | 411 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
412 | tz->trips.hot.flags.valid = 1; |
413 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
414 | "Found hot threshold [%lu]\n", | |
415 | tz->trips.critical.temperature)); | |
416 | } | |
a70cdc52 LB |
417 | } |
418 | ||
ce44e197 ZR |
419 | /* Passive (optional) */ |
420 | if (flag & ACPI_TRIPS_PASSIVE) { | |
421 | valid = tz->trips.passive.flags.valid; | |
422 | if (psv == -1) { | |
423 | status = AE_SUPPORT; | |
424 | } else if (psv > 0) { | |
27663c58 | 425 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
426 | status = AE_OK; |
427 | } else { | |
428 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 429 | "_PSV", NULL, &tmp); |
ce44e197 | 430 | } |
1da177e4 | 431 | |
1da177e4 LT |
432 | if (ACPI_FAILURE(status)) |
433 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 434 | else { |
27663c58 | 435 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
436 | tz->trips.passive.flags.valid = 1; |
437 | if (flag == ACPI_TRIPS_INIT) { | |
438 | status = acpi_evaluate_integer( | |
439 | tz->device->handle, "_TC1", | |
27663c58 | 440 | NULL, &tmp); |
ce44e197 ZR |
441 | if (ACPI_FAILURE(status)) |
442 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
443 | else |
444 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
445 | status = acpi_evaluate_integer( |
446 | tz->device->handle, "_TC2", | |
27663c58 | 447 | NULL, &tmp); |
ce44e197 ZR |
448 | if (ACPI_FAILURE(status)) |
449 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
450 | else |
451 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
452 | status = acpi_evaluate_integer( |
453 | tz->device->handle, "_TSP", | |
27663c58 | 454 | NULL, &tmp); |
ce44e197 ZR |
455 | if (ACPI_FAILURE(status)) |
456 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
457 | else |
458 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
459 | } |
460 | } | |
461 | } | |
462 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
463 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
464 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
465 | NULL, &devices); | |
1da177e4 LT |
466 | if (ACPI_FAILURE(status)) |
467 | tz->trips.passive.flags.valid = 0; | |
1da177e4 | 468 | else |
ce44e197 | 469 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 470 | |
ce44e197 ZR |
471 | if (memcmp(&tz->trips.passive.devices, &devices, |
472 | sizeof(struct acpi_handle_list))) { | |
473 | memcpy(&tz->trips.passive.devices, &devices, | |
474 | sizeof(struct acpi_handle_list)); | |
475 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
476 | } | |
477 | } | |
478 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
479 | if (valid != tz->trips.passive.flags.valid) | |
480 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
481 | } | |
1da177e4 | 482 | |
ce44e197 | 483 | /* Active (optional) */ |
4be44fcd | 484 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 485 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 486 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 487 | |
f8707ec9 | 488 | if (act == -1) |
ce44e197 ZR |
489 | break; /* disable all active trip points */ |
490 | ||
491 | if (flag & ACPI_TRIPS_ACTIVE) { | |
492 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 493 | name, NULL, &tmp); |
ce44e197 ZR |
494 | if (ACPI_FAILURE(status)) { |
495 | tz->trips.active[i].flags.valid = 0; | |
496 | if (i == 0) | |
497 | break; | |
498 | if (act <= 0) | |
499 | break; | |
500 | if (i == 1) | |
501 | tz->trips.active[0].temperature = | |
502 | CELSIUS_TO_KELVIN(act); | |
503 | else | |
504 | /* | |
505 | * Don't allow override higher than | |
506 | * the next higher trip point | |
507 | */ | |
508 | tz->trips.active[i - 1].temperature = | |
509 | (tz->trips.active[i - 2].temperature < | |
510 | CELSIUS_TO_KELVIN(act) ? | |
511 | tz->trips.active[i - 2].temperature : | |
512 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 513 | break; |
27663c58 MW |
514 | } else { |
515 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 516 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 517 | } |
f8707ec9 | 518 | } |
1da177e4 LT |
519 | |
520 | name[2] = 'L'; | |
ce44e197 ZR |
521 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
522 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
523 | status = acpi_evaluate_reference(tz->device->handle, | |
524 | name, NULL, &devices); | |
525 | if (ACPI_FAILURE(status)) | |
526 | tz->trips.active[i].flags.valid = 0; | |
527 | else | |
528 | tz->trips.active[i].flags.valid = 1; | |
529 | ||
530 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
531 | sizeof(struct acpi_handle_list))) { | |
532 | memcpy(&tz->trips.active[i].devices, &devices, | |
533 | sizeof(struct acpi_handle_list)); | |
534 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
535 | } | |
536 | } | |
537 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
538 | if (valid != tz->trips.active[i].flags.valid) | |
539 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
540 | ||
541 | if (!tz->trips.active[i].flags.valid) | |
542 | break; | |
543 | } | |
544 | ||
545 | if (flag & ACPI_TRIPS_DEVICES) { | |
546 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
547 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
548 | NULL, &devices); | |
549 | if (memcmp(&tz->devices, &devices, | |
550 | sizeof(struct acpi_handle_list))) { | |
551 | memcpy(&tz->devices, &devices, | |
552 | sizeof(struct acpi_handle_list)); | |
553 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
554 | } | |
1da177e4 LT |
555 | } |
556 | ||
d550d98d | 557 | return 0; |
1da177e4 LT |
558 | } |
559 | ||
ce44e197 | 560 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 561 | { |
ce44e197 | 562 | return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
1da177e4 LT |
563 | } |
564 | ||
4be44fcd | 565 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 566 | { |
223630fe | 567 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 568 | return -EINVAL; |
1da177e4 LT |
569 | |
570 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 571 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 572 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 573 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
574 | tz->trips.critical.flags.enabled = 0; |
575 | ||
14e04fb3 | 576 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 577 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
578 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
579 | tz->device->dev.bus_id, | |
580 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
581 | tz->trips.critical.flags.enabled); | |
1da177e4 | 582 | |
223630fe ZR |
583 | /* take no action if nocrt is set */ |
584 | if(!nocrt) { | |
585 | printk(KERN_EMERG | |
586 | "Critical temperature reached (%ld C), shutting down.\n", | |
587 | KELVIN_TO_CELSIUS(tz->temperature)); | |
588 | orderly_poweroff(true); | |
589 | } | |
1da177e4 | 590 | |
d550d98d | 591 | return 0; |
1da177e4 LT |
592 | } |
593 | ||
4be44fcd | 594 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 595 | { |
223630fe | 596 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 597 | return -EINVAL; |
1da177e4 LT |
598 | |
599 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 600 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 601 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 602 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
603 | tz->trips.hot.flags.enabled = 0; |
604 | ||
14e04fb3 | 605 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 606 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
607 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
608 | tz->device->dev.bus_id, | |
609 | ACPI_THERMAL_NOTIFY_HOT, | |
610 | tz->trips.hot.flags.enabled); | |
1da177e4 | 611 | |
223630fe | 612 | /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */ |
1da177e4 | 613 | |
d550d98d | 614 | return 0; |
1da177e4 LT |
615 | } |
616 | ||
1cbf4c56 | 617 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 618 | { |
1cbf4c56 | 619 | int result = 1; |
1da177e4 | 620 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
621 | int trend = 0; |
622 | int i = 0; | |
1da177e4 | 623 | |
1da177e4 LT |
624 | |
625 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 626 | return; |
1da177e4 LT |
627 | |
628 | passive = &(tz->trips.passive); | |
629 | ||
630 | /* | |
631 | * Above Trip? | |
632 | * ----------- | |
633 | * Calculate the thermal trend (using the passive cooling equation) | |
634 | * and modify the performance limit for all passive cooling devices | |
635 | * accordingly. Note that we assume symmetry. | |
636 | */ | |
637 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
638 | trend = |
639 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
640 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
641 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
642 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
643 | trend, passive->tc1, tz->temperature, | |
644 | tz->last_temperature, passive->tc2, | |
645 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 646 | passive->flags.enabled = 1; |
1da177e4 LT |
647 | /* Heating up? */ |
648 | if (trend > 0) | |
4be44fcd LB |
649 | for (i = 0; i < passive->devices.count; i++) |
650 | acpi_processor_set_thermal_limit(passive-> | |
651 | devices. | |
652 | handles[i], | |
653 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 654 | /* Cooling off? */ |
1cbf4c56 | 655 | else if (trend < 0) { |
4be44fcd | 656 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
657 | /* |
658 | * assume that we are on highest | |
659 | * freq/lowest thrott and can leave | |
660 | * passive mode, even in error case | |
661 | */ | |
662 | if (!acpi_processor_set_thermal_limit | |
663 | (passive->devices.handles[i], | |
664 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
665 | result = 0; | |
666 | /* | |
667 | * Leave cooling mode, even if the temp might | |
668 | * higher than trip point This is because some | |
669 | * machines might have long thermal polling | |
670 | * frequencies (tsp) defined. We will fall back | |
671 | * into passive mode in next cycle (probably quicker) | |
672 | */ | |
673 | if (result) { | |
674 | passive->flags.enabled = 0; | |
675 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
676 | "Disabling passive cooling, still above threshold," | |
677 | " but we are cooling down\n")); | |
678 | } | |
679 | } | |
680 | return; | |
1da177e4 LT |
681 | } |
682 | ||
683 | /* | |
684 | * Below Trip? | |
685 | * ----------- | |
686 | * Implement passive cooling hysteresis to slowly increase performance | |
687 | * and avoid thrashing around the passive trip point. Note that we | |
688 | * assume symmetry. | |
689 | */ | |
1cbf4c56 TR |
690 | if (!passive->flags.enabled) |
691 | return; | |
692 | for (i = 0; i < passive->devices.count; i++) | |
693 | if (!acpi_processor_set_thermal_limit | |
694 | (passive->devices.handles[i], | |
695 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
696 | result = 0; | |
697 | if (result) { | |
698 | passive->flags.enabled = 0; | |
699 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
700 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 701 | } |
1da177e4 LT |
702 | } |
703 | ||
1cbf4c56 | 704 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 705 | { |
4be44fcd | 706 | int result = 0; |
1da177e4 | 707 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
708 | int i = 0; |
709 | int j = 0; | |
710 | unsigned long maxtemp = 0; | |
1da177e4 | 711 | |
1da177e4 LT |
712 | |
713 | if (!tz) | |
1cbf4c56 | 714 | return; |
1da177e4 | 715 | |
4be44fcd | 716 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
717 | active = &(tz->trips.active[i]); |
718 | if (!active || !active->flags.valid) | |
719 | break; | |
1da177e4 | 720 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
721 | /* |
722 | * Above Threshold? | |
723 | * ---------------- | |
724 | * If not already enabled, turn ON all cooling devices | |
725 | * associated with this active threshold. | |
726 | */ | |
1da177e4 | 727 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
728 | tz->state.active_index = i; |
729 | maxtemp = active->temperature; | |
730 | if (active->flags.enabled) | |
731 | continue; | |
1da177e4 | 732 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
733 | result = |
734 | acpi_bus_set_power(active->devices. | |
735 | handles[j], | |
1cbf4c56 | 736 | ACPI_STATE_D0); |
1da177e4 | 737 | if (result) { |
cece9296 LB |
738 | printk(KERN_WARNING PREFIX |
739 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 740 | active->devices. |
cece9296 | 741 | handles[j]); |
1da177e4 LT |
742 | continue; |
743 | } | |
1cbf4c56 | 744 | active->flags.enabled = 1; |
4be44fcd | 745 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 746 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 747 | active->devices.handles[j])); |
1da177e4 | 748 | } |
1cbf4c56 TR |
749 | continue; |
750 | } | |
751 | if (!active->flags.enabled) | |
752 | continue; | |
753 | /* | |
754 | * Below Threshold? | |
755 | * ---------------- | |
756 | * Turn OFF all cooling devices associated with this | |
757 | * threshold. | |
758 | */ | |
759 | for (j = 0; j < active->devices.count; j++) { | |
760 | result = acpi_bus_set_power(active->devices.handles[j], | |
761 | ACPI_STATE_D3); | |
762 | if (result) { | |
cece9296 LB |
763 | printk(KERN_WARNING PREFIX |
764 | "Unable to turn cooling device [%p] 'off'\n", | |
765 | active->devices.handles[j]); | |
1cbf4c56 TR |
766 | continue; |
767 | } | |
768 | active->flags.enabled = 0; | |
769 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
770 | "Cooling device [%p] now 'off'\n", | |
771 | active->devices.handles[j])); | |
1da177e4 LT |
772 | } |
773 | } | |
1da177e4 LT |
774 | } |
775 | ||
4be44fcd | 776 | static void acpi_thermal_check(void *context); |
1da177e4 | 777 | |
4be44fcd | 778 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
779 | { |
780 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
781 | if (!tz->zombie) | |
b8d35192 | 782 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
783 | } |
784 | ||
ea51011a ZY |
785 | static void acpi_thermal_active_off(void *data) |
786 | { | |
787 | int result = 0; | |
788 | struct acpi_thermal *tz = data; | |
789 | int i = 0; | |
790 | int j = 0; | |
791 | struct acpi_thermal_active *active = NULL; | |
792 | ||
793 | if (!tz) { | |
794 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
795 | return; | |
796 | } | |
797 | ||
798 | result = acpi_thermal_get_temperature(tz); | |
799 | if (result) | |
800 | return; | |
801 | ||
802 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
803 | active = &(tz->trips.active[i]); | |
804 | if (!active || !active->flags.valid) | |
805 | break; | |
806 | if (tz->temperature >= active->temperature) { | |
807 | /* | |
808 | * If the thermal temperature is greater than the | |
809 | * active threshod, unnecessary to turn off the | |
810 | * the active cooling device. | |
811 | */ | |
812 | continue; | |
813 | } | |
814 | /* | |
815 | * Below Threshold? | |
816 | * ---------------- | |
817 | * Turn OFF all cooling devices associated with this | |
818 | * threshold. | |
819 | */ | |
820 | for (j = 0; j < active->devices.count; j++) | |
821 | result = acpi_bus_set_power(active->devices.handles[j], | |
822 | ACPI_STATE_D3); | |
823 | } | |
824 | } | |
825 | ||
4be44fcd | 826 | static void acpi_thermal_check(void *data) |
1da177e4 | 827 | { |
4be44fcd | 828 | int result = 0; |
50dd0969 | 829 | struct acpi_thermal *tz = data; |
4be44fcd | 830 | unsigned long sleep_time = 0; |
21bc42ab | 831 | unsigned long timeout_jiffies = 0; |
4be44fcd | 832 | int i = 0; |
1da177e4 LT |
833 | struct acpi_thermal_state state; |
834 | ||
1da177e4 LT |
835 | |
836 | if (!tz) { | |
6468463a | 837 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 838 | return; |
1da177e4 LT |
839 | } |
840 | ||
6e215785 AS |
841 | /* Check if someone else is already running */ |
842 | if (!mutex_trylock(&tz->lock)) | |
843 | return; | |
844 | ||
1da177e4 LT |
845 | state = tz->state; |
846 | ||
847 | result = acpi_thermal_get_temperature(tz); | |
848 | if (result) | |
6e215785 | 849 | goto unlock; |
4be44fcd | 850 | |
3f655ef8 ZR |
851 | if (!tz->tz_enabled) |
852 | goto unlock; | |
853 | ||
1da177e4 | 854 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 855 | |
1da177e4 LT |
856 | /* |
857 | * Check Trip Points | |
858 | * ----------------- | |
859 | * Compare the current temperature to the trip point values to see | |
860 | * if we've entered one of the thermal policy states. Note that | |
861 | * this function determines when a state is entered, but the | |
862 | * individual policy decides when it is exited (e.g. hysteresis). | |
863 | */ | |
864 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
865 | state.critical |= |
866 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
867 | if (tz->trips.hot.flags.valid) |
868 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
869 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
870 | state.passive |= |
871 | (tz->temperature >= tz->trips.passive.temperature); | |
872 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 873 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
874 | state.active |= |
875 | (tz->temperature >= | |
876 | tz->trips.active[i].temperature); | |
1da177e4 LT |
877 | |
878 | /* | |
879 | * Invoke Policy | |
880 | * ------------- | |
881 | * Separated from the above check to allow individual policy to | |
882 | * determine when to exit a given state. | |
883 | */ | |
884 | if (state.critical) | |
885 | acpi_thermal_critical(tz); | |
886 | if (state.hot) | |
887 | acpi_thermal_hot(tz); | |
888 | if (state.passive) | |
889 | acpi_thermal_passive(tz); | |
890 | if (state.active) | |
891 | acpi_thermal_active(tz); | |
892 | ||
893 | /* | |
894 | * Calculate State | |
895 | * --------------- | |
896 | * Again, separated from the above two to allow independent policy | |
897 | * decisions. | |
898 | */ | |
1cbf4c56 TR |
899 | tz->state.critical = tz->trips.critical.flags.enabled; |
900 | tz->state.hot = tz->trips.hot.flags.enabled; | |
901 | tz->state.passive = tz->trips.passive.flags.enabled; | |
902 | tz->state.active = 0; | |
4be44fcd | 903 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 904 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
905 | |
906 | /* | |
907 | * Calculate Sleep Time | |
908 | * -------------------- | |
909 | * If we're in the passive state, use _TSP's value. Otherwise | |
910 | * use the default polling frequency (e.g. _TZP). If no polling | |
911 | * frequency is specified then we'll wait forever (at least until | |
912 | * a thermal event occurs). Note that _TSP and _TZD values are | |
913 | * given in 1/10th seconds (we must covert to milliseconds). | |
914 | */ | |
21bc42ab | 915 | if (tz->state.passive) { |
1da177e4 | 916 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
917 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
918 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 919 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
920 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
921 | } | |
1da177e4 | 922 | |
4be44fcd LB |
923 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
924 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
925 | |
926 | /* | |
927 | * Schedule Next Poll | |
928 | * ------------------ | |
929 | */ | |
930 | if (!sleep_time) { | |
931 | if (timer_pending(&(tz->timer))) | |
932 | del_timer(&(tz->timer)); | |
4be44fcd | 933 | } else { |
1da177e4 | 934 | if (timer_pending(&(tz->timer))) |
21bc42ab | 935 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 936 | else { |
4be44fcd | 937 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 938 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 939 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
940 | add_timer(&(tz->timer)); |
941 | } | |
942 | } | |
6e215785 AS |
943 | unlock: |
944 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
945 | } |
946 | ||
3f655ef8 | 947 | /* sys I/F for generic thermal sysfs support */ |
5e012760 ZR |
948 | #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200) |
949 | ||
3f655ef8 ZR |
950 | static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) |
951 | { | |
952 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 953 | int result; |
3f655ef8 ZR |
954 | |
955 | if (!tz) | |
956 | return -EINVAL; | |
957 | ||
76ecb4f2 ZR |
958 | result = acpi_thermal_get_temperature(tz); |
959 | if (result) | |
960 | return result; | |
961 | ||
5e012760 | 962 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature)); |
3f655ef8 ZR |
963 | } |
964 | ||
965 | static const char enabled[] = "kernel"; | |
966 | static const char disabled[] = "user"; | |
967 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
968 | char *buf) | |
969 | { | |
970 | struct acpi_thermal *tz = thermal->devdata; | |
971 | ||
972 | if (!tz) | |
973 | return -EINVAL; | |
974 | ||
975 | return sprintf(buf, "%s\n", tz->tz_enabled ? | |
976 | enabled : disabled); | |
977 | } | |
978 | ||
979 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
980 | const char *buf) | |
981 | { | |
982 | struct acpi_thermal *tz = thermal->devdata; | |
983 | int enable; | |
984 | ||
985 | if (!tz) | |
986 | return -EINVAL; | |
987 | ||
988 | /* | |
989 | * enable/disable thermal management from ACPI thermal driver | |
990 | */ | |
991 | if (!strncmp(buf, enabled, sizeof enabled - 1)) | |
992 | enable = 1; | |
993 | else if (!strncmp(buf, disabled, sizeof disabled - 1)) | |
994 | enable = 0; | |
995 | else | |
996 | return -EINVAL; | |
997 | ||
998 | if (enable != tz->tz_enabled) { | |
999 | tz->tz_enabled = enable; | |
1000 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1001 | "%s ACPI thermal control\n", | |
1002 | tz->tz_enabled ? enabled : disabled)); | |
1003 | acpi_thermal_check(tz); | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
1009 | int trip, char *buf) | |
1010 | { | |
1011 | struct acpi_thermal *tz = thermal->devdata; | |
1012 | int i; | |
1013 | ||
1014 | if (!tz || trip < 0) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | if (tz->trips.critical.flags.valid) { | |
1018 | if (!trip) | |
1019 | return sprintf(buf, "critical\n"); | |
1020 | trip--; | |
1021 | } | |
1022 | ||
1023 | if (tz->trips.hot.flags.valid) { | |
1024 | if (!trip) | |
1025 | return sprintf(buf, "hot\n"); | |
1026 | trip--; | |
1027 | } | |
1028 | ||
1029 | if (tz->trips.passive.flags.valid) { | |
1030 | if (!trip) | |
1031 | return sprintf(buf, "passive\n"); | |
1032 | trip--; | |
1033 | } | |
1034 | ||
1035 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1036 | tz->trips.active[i].flags.valid; i++) { | |
1037 | if (!trip) | |
1038 | return sprintf(buf, "active%d\n", i); | |
1039 | trip--; | |
1040 | } | |
1041 | ||
1042 | return -EINVAL; | |
1043 | } | |
1044 | ||
1045 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
1046 | int trip, char *buf) | |
1047 | { | |
1048 | struct acpi_thermal *tz = thermal->devdata; | |
1049 | int i; | |
1050 | ||
1051 | if (!tz || trip < 0) | |
1052 | return -EINVAL; | |
1053 | ||
1054 | if (tz->trips.critical.flags.valid) { | |
1055 | if (!trip) | |
5e012760 | 1056 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1057 | tz->trips.critical.temperature)); |
1058 | trip--; | |
1059 | } | |
1060 | ||
1061 | if (tz->trips.hot.flags.valid) { | |
1062 | if (!trip) | |
5e012760 | 1063 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1064 | tz->trips.hot.temperature)); |
1065 | trip--; | |
1066 | } | |
1067 | ||
1068 | if (tz->trips.passive.flags.valid) { | |
1069 | if (!trip) | |
5e012760 | 1070 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1071 | tz->trips.passive.temperature)); |
1072 | trip--; | |
1073 | } | |
1074 | ||
1075 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1076 | tz->trips.active[i].flags.valid; i++) { | |
1077 | if (!trip) | |
5e012760 | 1078 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1079 | tz->trips.active[i].temperature)); |
1080 | trip--; | |
1081 | } | |
1082 | ||
1083 | return -EINVAL; | |
1084 | } | |
1085 | ||
9ec732ff ZR |
1086 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
1087 | unsigned long *temperature) { | |
1088 | struct acpi_thermal *tz = thermal->devdata; | |
1089 | ||
1090 | if (tz->trips.critical.flags.valid) { | |
1091 | *temperature = KELVIN_TO_MILLICELSIUS( | |
1092 | tz->trips.critical.temperature); | |
1093 | return 0; | |
1094 | } else | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
3f655ef8 ZR |
1098 | typedef int (*cb)(struct thermal_zone_device *, int, |
1099 | struct thermal_cooling_device *); | |
1100 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
1101 | struct thermal_cooling_device *cdev, | |
1102 | cb action) | |
1103 | { | |
1104 | struct acpi_device *device = cdev->devdata; | |
1105 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
1106 | struct acpi_device *dev; |
1107 | acpi_status status; | |
1108 | acpi_handle handle; | |
3f655ef8 ZR |
1109 | int i; |
1110 | int j; | |
1111 | int trip = -1; | |
1112 | int result = 0; | |
1113 | ||
1114 | if (tz->trips.critical.flags.valid) | |
1115 | trip++; | |
1116 | ||
1117 | if (tz->trips.hot.flags.valid) | |
1118 | trip++; | |
1119 | ||
1120 | if (tz->trips.passive.flags.valid) { | |
1121 | trip++; | |
1122 | for (i = 0; i < tz->trips.passive.devices.count; | |
1123 | i++) { | |
653a00c9 ZR |
1124 | handle = tz->trips.passive.devices.handles[i]; |
1125 | status = acpi_bus_get_device(handle, &dev); | |
1126 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1127 | result = action(thermal, trip, cdev); | |
1128 | if (result) | |
1129 | goto failed; | |
1130 | } | |
3f655ef8 ZR |
1131 | } |
1132 | } | |
1133 | ||
1134 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1135 | if (!tz->trips.active[i].flags.valid) | |
1136 | break; | |
1137 | trip++; | |
1138 | for (j = 0; | |
1139 | j < tz->trips.active[i].devices.count; | |
1140 | j++) { | |
653a00c9 ZR |
1141 | handle = tz->trips.active[i].devices.handles[j]; |
1142 | status = acpi_bus_get_device(handle, &dev); | |
1143 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1144 | result = action(thermal, trip, cdev); | |
1145 | if (result) | |
1146 | goto failed; | |
1147 | } | |
3f655ef8 ZR |
1148 | } |
1149 | } | |
1150 | ||
1151 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
1152 | handle = tz->devices.handles[i]; |
1153 | status = acpi_bus_get_device(handle, &dev); | |
1154 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1155 | result = action(thermal, -1, cdev); | |
1156 | if (result) | |
1157 | goto failed; | |
1158 | } | |
3f655ef8 ZR |
1159 | } |
1160 | ||
1161 | failed: | |
1162 | return result; | |
1163 | } | |
1164 | ||
1165 | static int | |
1166 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
1167 | struct thermal_cooling_device *cdev) | |
1168 | { | |
1169 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1170 | thermal_zone_bind_cooling_device); | |
1171 | } | |
1172 | ||
1173 | static int | |
1174 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
1175 | struct thermal_cooling_device *cdev) | |
1176 | { | |
1177 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1178 | thermal_zone_unbind_cooling_device); | |
1179 | } | |
1180 | ||
1181 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
1182 | .bind = acpi_thermal_bind_cooling_device, | |
1183 | .unbind = acpi_thermal_unbind_cooling_device, | |
1184 | .get_temp = thermal_get_temp, | |
1185 | .get_mode = thermal_get_mode, | |
1186 | .set_mode = thermal_set_mode, | |
1187 | .get_trip_type = thermal_get_trip_type, | |
1188 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 1189 | .get_crit_temp = thermal_get_crit_temp, |
3f655ef8 ZR |
1190 | }; |
1191 | ||
1192 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
1193 | { | |
1194 | int trips = 0; | |
1195 | int result; | |
20733939 | 1196 | acpi_status status; |
3f655ef8 ZR |
1197 | int i; |
1198 | ||
1199 | if (tz->trips.critical.flags.valid) | |
1200 | trips++; | |
1201 | ||
1202 | if (tz->trips.hot.flags.valid) | |
1203 | trips++; | |
1204 | ||
1205 | if (tz->trips.passive.flags.valid) | |
1206 | trips++; | |
1207 | ||
1208 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1209 | tz->trips.active[i].flags.valid; i++, trips++); | |
e9ae7107 | 1210 | tz->thermal_zone = thermal_zone_device_register("acpitz", |
3f655ef8 | 1211 | trips, tz, &acpi_thermal_zone_ops); |
bb070e43 | 1212 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
1213 | return -ENODEV; |
1214 | ||
1215 | result = sysfs_create_link(&tz->device->dev.kobj, | |
1216 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
1217 | if (result) | |
1218 | return result; | |
1219 | ||
1220 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
1221 | &tz->device->dev.kobj, "device"); | |
1222 | if (result) | |
1223 | return result; | |
1224 | ||
20733939 ZR |
1225 | status = acpi_attach_data(tz->device->handle, |
1226 | acpi_bus_private_data_handler, | |
1227 | tz->thermal_zone); | |
1228 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
1229 | printk(KERN_ERR PREFIX |
1230 | "Error attaching device data\n"); | |
20733939 ZR |
1231 | return -ENODEV; |
1232 | } | |
1233 | ||
3f655ef8 ZR |
1234 | tz->tz_enabled = 1; |
1235 | ||
fc3a8828 GKH |
1236 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
1237 | tz->thermal_zone->id); | |
3f655ef8 ZR |
1238 | return 0; |
1239 | } | |
1240 | ||
1241 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
1242 | { | |
1243 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
1244 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
1245 | thermal_zone_device_unregister(tz->thermal_zone); | |
1246 | tz->thermal_zone = NULL; | |
20733939 | 1247 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
1248 | } |
1249 | ||
1250 | ||
1da177e4 LT |
1251 | /* -------------------------------------------------------------------------- |
1252 | FS Interface (/proc) | |
1253 | -------------------------------------------------------------------------- */ | |
1254 | ||
4be44fcd | 1255 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
1256 | |
1257 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
1258 | { | |
50dd0969 | 1259 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1260 | |
1da177e4 LT |
1261 | |
1262 | if (!tz) | |
1263 | goto end; | |
1264 | ||
1265 | seq_puts(seq, "state: "); | |
1266 | ||
4be44fcd LB |
1267 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
1268 | && !tz->state.active) | |
1da177e4 LT |
1269 | seq_puts(seq, "ok\n"); |
1270 | else { | |
1271 | if (tz->state.critical) | |
1272 | seq_puts(seq, "critical "); | |
1273 | if (tz->state.hot) | |
1274 | seq_puts(seq, "hot "); | |
1275 | if (tz->state.passive) | |
1276 | seq_puts(seq, "passive "); | |
1277 | if (tz->state.active) | |
1278 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1279 | seq_puts(seq, "\n"); | |
1280 | } | |
1281 | ||
4be44fcd | 1282 | end: |
d550d98d | 1283 | return 0; |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1287 | { | |
1288 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1289 | } | |
1290 | ||
1da177e4 LT |
1291 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1292 | { | |
4be44fcd | 1293 | int result = 0; |
50dd0969 | 1294 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1295 | |
1da177e4 LT |
1296 | |
1297 | if (!tz) | |
1298 | goto end; | |
1299 | ||
1300 | result = acpi_thermal_get_temperature(tz); | |
1301 | if (result) | |
1302 | goto end; | |
1303 | ||
4be44fcd LB |
1304 | seq_printf(seq, "temperature: %ld C\n", |
1305 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1306 | |
4be44fcd | 1307 | end: |
d550d98d | 1308 | return 0; |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1312 | { | |
1313 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1314 | } | |
1315 | ||
1da177e4 LT |
1316 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1317 | { | |
50dd0969 | 1318 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1319 | struct acpi_device *device; |
e7c746ef TR |
1320 | acpi_status status; |
1321 | ||
4be44fcd LB |
1322 | int i = 0; |
1323 | int j = 0; | |
1da177e4 | 1324 | |
1da177e4 LT |
1325 | |
1326 | if (!tz) | |
1327 | goto end; | |
1328 | ||
1329 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1330 | seq_printf(seq, "critical (S5): %ld C%s", |
1331 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1332 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1333 | |
1334 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1335 | seq_printf(seq, "hot (S4): %ld C%s", |
1336 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1337 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1338 | |
1339 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1340 | seq_printf(seq, |
1341 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1342 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1343 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1344 | tz->trips.passive.tsp); | |
1345 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1346 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1347 | handles[j], &device); | |
1348 | seq_printf(seq, "%4.4s ", status ? "" : | |
1349 | acpi_device_bid(device)); | |
1da177e4 LT |
1350 | } |
1351 | seq_puts(seq, "\n"); | |
1352 | } | |
1353 | ||
1354 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1355 | if (!(tz->trips.active[i].flags.valid)) | |
1356 | break; | |
1357 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1358 | i, |
1359 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1360 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1361 | status = acpi_bus_get_device(tz->trips.active[i]. |
1362 | devices.handles[j], | |
1363 | &device); | |
1364 | seq_printf(seq, "%4.4s ", status ? "" : | |
1365 | acpi_device_bid(device)); | |
68ccfaa8 | 1366 | } |
1da177e4 LT |
1367 | seq_puts(seq, "\n"); |
1368 | } | |
1369 | ||
4be44fcd | 1370 | end: |
d550d98d | 1371 | return 0; |
1da177e4 LT |
1372 | } |
1373 | ||
1374 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1375 | { | |
1376 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1377 | } | |
1378 | ||
1da177e4 LT |
1379 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1380 | { | |
50dd0969 | 1381 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1382 | |
1da177e4 LT |
1383 | |
1384 | if (!tz) | |
1385 | goto end; | |
1386 | ||
eaca2d3f | 1387 | if (!tz->flags.cooling_mode) |
1da177e4 | 1388 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1389 | else |
eaca2d3f | 1390 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1391 | |
4be44fcd | 1392 | end: |
d550d98d | 1393 | return 0; |
1da177e4 LT |
1394 | } |
1395 | ||
1396 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1397 | { | |
1398 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1399 | PDE(inode)->data); |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | static ssize_t | |
4be44fcd LB |
1403 | acpi_thermal_write_cooling_mode(struct file *file, |
1404 | const char __user * buffer, | |
1405 | size_t count, loff_t * ppos) | |
1da177e4 | 1406 | { |
50dd0969 JE |
1407 | struct seq_file *m = file->private_data; |
1408 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1409 | int result = 0; |
1410 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1411 | |
1da177e4 LT |
1412 | |
1413 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1414 | return -EINVAL; |
1da177e4 LT |
1415 | |
1416 | if (!tz->flags.cooling_mode) | |
d550d98d | 1417 | return -ENODEV; |
1da177e4 LT |
1418 | |
1419 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1420 | return -EFAULT; |
4be44fcd | 1421 | |
1da177e4 | 1422 | mode_string[count] = '\0'; |
4be44fcd LB |
1423 | |
1424 | result = acpi_thermal_set_cooling_mode(tz, | |
1425 | simple_strtoul(mode_string, NULL, | |
1426 | 0)); | |
1da177e4 | 1427 | if (result) |
d550d98d | 1428 | return result; |
1da177e4 LT |
1429 | |
1430 | acpi_thermal_check(tz); | |
1431 | ||
d550d98d | 1432 | return count; |
1da177e4 LT |
1433 | } |
1434 | ||
1da177e4 LT |
1435 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1436 | { | |
50dd0969 | 1437 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1438 | |
1da177e4 LT |
1439 | |
1440 | if (!tz) | |
1441 | goto end; | |
1442 | ||
1443 | if (!tz->polling_frequency) { | |
1444 | seq_puts(seq, "<polling disabled>\n"); | |
1445 | goto end; | |
1446 | } | |
1447 | ||
1448 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1449 | (tz->polling_frequency / 10)); |
1da177e4 | 1450 | |
4be44fcd | 1451 | end: |
d550d98d | 1452 | return 0; |
1da177e4 LT |
1453 | } |
1454 | ||
1455 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1456 | { | |
1457 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1458 | PDE(inode)->data); |
1da177e4 LT |
1459 | } |
1460 | ||
1461 | static ssize_t | |
4be44fcd LB |
1462 | acpi_thermal_write_polling(struct file *file, |
1463 | const char __user * buffer, | |
1464 | size_t count, loff_t * ppos) | |
1da177e4 | 1465 | { |
50dd0969 JE |
1466 | struct seq_file *m = file->private_data; |
1467 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1468 | int result = 0; |
1469 | char polling_string[12] = { '\0' }; | |
1470 | int seconds = 0; | |
1da177e4 | 1471 | |
1da177e4 LT |
1472 | |
1473 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1474 | return -EINVAL; |
4be44fcd | 1475 | |
1da177e4 | 1476 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1477 | return -EFAULT; |
4be44fcd | 1478 | |
1da177e4 LT |
1479 | polling_string[count] = '\0'; |
1480 | ||
1481 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1482 | |
1da177e4 LT |
1483 | result = acpi_thermal_set_polling(tz, seconds); |
1484 | if (result) | |
d550d98d | 1485 | return result; |
1da177e4 LT |
1486 | |
1487 | acpi_thermal_check(tz); | |
1488 | ||
d550d98d | 1489 | return count; |
1da177e4 LT |
1490 | } |
1491 | ||
4be44fcd | 1492 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1493 | { |
4be44fcd | 1494 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1495 | |
1da177e4 LT |
1496 | |
1497 | if (!acpi_device_dir(device)) { | |
1498 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1499 | acpi_thermal_dir); |
1da177e4 | 1500 | if (!acpi_device_dir(device)) |
d550d98d | 1501 | return -ENODEV; |
1da177e4 LT |
1502 | acpi_device_dir(device)->owner = THIS_MODULE; |
1503 | } | |
1504 | ||
1505 | /* 'state' [R] */ | |
cf7acfab DL |
1506 | entry = proc_create_data(ACPI_THERMAL_FILE_STATE, |
1507 | S_IRUGO, acpi_device_dir(device), | |
1508 | &acpi_thermal_state_fops, | |
1509 | acpi_driver_data(device)); | |
1da177e4 | 1510 | if (!entry) |
d550d98d | 1511 | return -ENODEV; |
1da177e4 LT |
1512 | |
1513 | /* 'temperature' [R] */ | |
cf7acfab DL |
1514 | entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, |
1515 | S_IRUGO, acpi_device_dir(device), | |
1516 | &acpi_thermal_temp_fops, | |
1517 | acpi_driver_data(device)); | |
1da177e4 | 1518 | if (!entry) |
d550d98d | 1519 | return -ENODEV; |
1da177e4 | 1520 | |
2db9ccba | 1521 | /* 'trip_points' [R] */ |
cf7acfab DL |
1522 | entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, |
1523 | S_IRUGO, | |
1524 | acpi_device_dir(device), | |
1525 | &acpi_thermal_trip_fops, | |
1526 | acpi_driver_data(device)); | |
1da177e4 | 1527 | if (!entry) |
d550d98d | 1528 | return -ENODEV; |
1da177e4 LT |
1529 | |
1530 | /* 'cooling_mode' [R/W] */ | |
cf7acfab DL |
1531 | entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, |
1532 | S_IFREG | S_IRUGO | S_IWUSR, | |
1533 | acpi_device_dir(device), | |
1534 | &acpi_thermal_cooling_fops, | |
1535 | acpi_driver_data(device)); | |
1da177e4 | 1536 | if (!entry) |
d550d98d | 1537 | return -ENODEV; |
1da177e4 LT |
1538 | |
1539 | /* 'polling_frequency' [R/W] */ | |
cf7acfab DL |
1540 | entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, |
1541 | S_IFREG | S_IRUGO | S_IWUSR, | |
1542 | acpi_device_dir(device), | |
1543 | &acpi_thermal_polling_fops, | |
1544 | acpi_driver_data(device)); | |
1da177e4 | 1545 | if (!entry) |
d550d98d | 1546 | return -ENODEV; |
d550d98d | 1547 | return 0; |
1da177e4 LT |
1548 | } |
1549 | ||
4be44fcd | 1550 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1551 | { |
1da177e4 LT |
1552 | |
1553 | if (acpi_device_dir(device)) { | |
1554 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1555 | acpi_device_dir(device)); | |
1556 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1557 | acpi_device_dir(device)); | |
1558 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1559 | acpi_device_dir(device)); | |
1560 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1561 | acpi_device_dir(device)); | |
1562 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1563 | acpi_device_dir(device)); | |
1564 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1565 | acpi_device_dir(device) = NULL; | |
1566 | } | |
1567 | ||
d550d98d | 1568 | return 0; |
1da177e4 LT |
1569 | } |
1570 | ||
1da177e4 LT |
1571 | /* -------------------------------------------------------------------------- |
1572 | Driver Interface | |
1573 | -------------------------------------------------------------------------- */ | |
1574 | ||
4be44fcd | 1575 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1576 | { |
50dd0969 | 1577 | struct acpi_thermal *tz = data; |
4be44fcd | 1578 | struct acpi_device *device = NULL; |
1da177e4 | 1579 | |
1da177e4 LT |
1580 | |
1581 | if (!tz) | |
d550d98d | 1582 | return; |
1da177e4 | 1583 | |
8348e1b1 | 1584 | device = tz->device; |
1da177e4 LT |
1585 | |
1586 | switch (event) { | |
1587 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1588 | acpi_thermal_check(tz); | |
1589 | break; | |
1590 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1591 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1592 | acpi_thermal_check(tz); |
14e04fb3 | 1593 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1594 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1595 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1596 | break; |
1597 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1598 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1599 | acpi_thermal_check(tz); | |
14e04fb3 | 1600 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1601 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1602 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1603 | break; |
1604 | default: | |
1605 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1606 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1607 | break; |
1608 | } | |
1609 | ||
d550d98d | 1610 | return; |
1da177e4 LT |
1611 | } |
1612 | ||
4be44fcd | 1613 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1614 | { |
4be44fcd | 1615 | int result = 0; |
1da177e4 | 1616 | |
1da177e4 LT |
1617 | |
1618 | if (!tz) | |
d550d98d | 1619 | return -EINVAL; |
1da177e4 LT |
1620 | |
1621 | /* Get temperature [_TMP] (required) */ | |
1622 | result = acpi_thermal_get_temperature(tz); | |
1623 | if (result) | |
d550d98d | 1624 | return result; |
1da177e4 LT |
1625 | |
1626 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1627 | result = acpi_thermal_get_trip_points(tz); | |
1628 | if (result) | |
d550d98d | 1629 | return result; |
1da177e4 LT |
1630 | |
1631 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1632 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1633 | if (!result) |
1da177e4 | 1634 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1635 | |
1636 | /* Get default polling frequency [_TZP] (optional) */ | |
1637 | if (tzp) | |
1638 | tz->polling_frequency = tzp; | |
1639 | else | |
1640 | acpi_thermal_get_polling_frequency(tz); | |
1641 | ||
d550d98d | 1642 | return 0; |
1da177e4 LT |
1643 | } |
1644 | ||
4be44fcd | 1645 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1646 | { |
4be44fcd LB |
1647 | int result = 0; |
1648 | acpi_status status = AE_OK; | |
1649 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1650 | |
1da177e4 LT |
1651 | |
1652 | if (!device) | |
d550d98d | 1653 | return -EINVAL; |
1da177e4 | 1654 | |
36bcbec7 | 1655 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1656 | if (!tz) |
d550d98d | 1657 | return -ENOMEM; |
1da177e4 | 1658 | |
8348e1b1 | 1659 | tz->device = device; |
1da177e4 LT |
1660 | strcpy(tz->name, device->pnp.bus_id); |
1661 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1662 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1663 | device->driver_data = tz; |
6e215785 | 1664 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1665 | |
1666 | ||
1da177e4 LT |
1667 | result = acpi_thermal_get_info(tz); |
1668 | if (result) | |
3f655ef8 ZR |
1669 | goto free_memory; |
1670 | ||
1671 | result = acpi_thermal_register_thermal_zone(tz); | |
1672 | if (result) | |
1673 | goto free_memory; | |
1da177e4 LT |
1674 | |
1675 | result = acpi_thermal_add_fs(device); | |
1676 | if (result) | |
3f655ef8 | 1677 | goto unregister_thermal_zone; |
1da177e4 LT |
1678 | |
1679 | init_timer(&tz->timer); | |
1680 | ||
ea51011a ZY |
1681 | acpi_thermal_active_off(tz); |
1682 | ||
1da177e4 LT |
1683 | acpi_thermal_check(tz); |
1684 | ||
38ba7c9e | 1685 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1686 | ACPI_DEVICE_NOTIFY, |
1687 | acpi_thermal_notify, tz); | |
1da177e4 | 1688 | if (ACPI_FAILURE(status)) { |
1da177e4 | 1689 | result = -ENODEV; |
3f655ef8 | 1690 | goto remove_fs; |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1694 | acpi_device_name(device), acpi_device_bid(device), |
1695 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1696 | goto end; |
1da177e4 | 1697 | |
3f655ef8 ZR |
1698 | remove_fs: |
1699 | acpi_thermal_remove_fs(device); | |
1700 | unregister_thermal_zone: | |
1701 | thermal_zone_device_unregister(tz->thermal_zone); | |
1702 | free_memory: | |
1703 | kfree(tz); | |
1704 | end: | |
d550d98d | 1705 | return result; |
1da177e4 LT |
1706 | } |
1707 | ||
4be44fcd | 1708 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1709 | { |
4be44fcd LB |
1710 | acpi_status status = AE_OK; |
1711 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1712 | |
1da177e4 LT |
1713 | |
1714 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1715 | return -EINVAL; |
1da177e4 | 1716 | |
50dd0969 | 1717 | tz = acpi_driver_data(device); |
1da177e4 LT |
1718 | |
1719 | /* avoid timer adding new defer task */ | |
1720 | tz->zombie = 1; | |
1721 | /* wait for running timer (on other CPUs) finish */ | |
1722 | del_timer_sync(&(tz->timer)); | |
1723 | /* synchronize deferred task */ | |
1724 | acpi_os_wait_events_complete(NULL); | |
1725 | /* deferred task may reinsert timer */ | |
1726 | del_timer_sync(&(tz->timer)); | |
1727 | ||
38ba7c9e | 1728 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1729 | ACPI_DEVICE_NOTIFY, |
1730 | acpi_thermal_notify); | |
1da177e4 LT |
1731 | |
1732 | /* Terminate policy */ | |
4be44fcd | 1733 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1734 | tz->trips.passive.flags.enabled = 0; |
1735 | acpi_thermal_passive(tz); | |
1736 | } | |
1737 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1738 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1739 | tz->trips.active[0].flags.enabled = 0; |
1740 | acpi_thermal_active(tz); | |
1741 | } | |
1742 | ||
1743 | acpi_thermal_remove_fs(device); | |
3f655ef8 | 1744 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1745 | mutex_destroy(&tz->lock); |
1da177e4 | 1746 | kfree(tz); |
d550d98d | 1747 | return 0; |
1da177e4 LT |
1748 | } |
1749 | ||
5d9464a4 | 1750 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1751 | { |
1752 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1753 | int i, j, power_state, result; |
1754 | ||
74ce1468 KK |
1755 | |
1756 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1757 | return -EINVAL; |
74ce1468 | 1758 | |
50dd0969 | 1759 | tz = acpi_driver_data(device); |
74ce1468 | 1760 | |
bed936f7 | 1761 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1762 | if (!(&tz->trips.active[i])) |
1763 | break; | |
1764 | if (!tz->trips.active[i].flags.valid) | |
1765 | break; | |
1766 | tz->trips.active[i].flags.enabled = 1; | |
1767 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1768 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1769 | handles[j], &power_state); | |
1770 | if (result || (power_state != ACPI_STATE_D0)) { | |
1771 | tz->trips.active[i].flags.enabled = 0; | |
1772 | break; | |
1773 | } | |
bed936f7 | 1774 | } |
b1028c54 | 1775 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1776 | } |
1777 | ||
b1028c54 | 1778 | acpi_thermal_check(tz); |
74ce1468 KK |
1779 | |
1780 | return AE_OK; | |
1781 | } | |
1782 | ||
1855256c | 1783 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1784 | |
1785 | if (act == 0) { | |
1786 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1787 | "disabling all active thermal trip points\n", d->ident); | |
1788 | act = -1; | |
1789 | } | |
1790 | return 0; | |
1791 | } | |
1855256c | 1792 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1793 | |
1794 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1795 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1796 | nocrt = 1; | |
1797 | return 0; | |
1798 | } | |
1855256c | 1799 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1800 | |
1801 | if (tzp == 0) { | |
1802 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1803 | "enabling thermal zone polling\n", d->ident); | |
1804 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1805 | } | |
1806 | return 0; | |
1807 | } | |
1855256c | 1808 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1809 | |
1810 | if (psv == 0) { | |
1811 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1812 | "disabling all passive thermal trip points\n", d->ident); | |
1813 | psv = -1; | |
1814 | } | |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1819 | /* | |
1820 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1821 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1822 | */ | |
1823 | { | |
1824 | .callback = thermal_act, | |
1825 | .ident = "AOpen i915GMm-HFS", | |
1826 | .matches = { | |
1827 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1828 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1829 | }, | |
1830 | }, | |
1831 | { | |
1832 | .callback = thermal_psv, | |
1833 | .ident = "AOpen i915GMm-HFS", | |
1834 | .matches = { | |
1835 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1836 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1837 | }, | |
1838 | }, | |
1839 | { | |
1840 | .callback = thermal_tzp, | |
1841 | .ident = "AOpen i915GMm-HFS", | |
1842 | .matches = { | |
1843 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1844 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1845 | }, | |
1846 | }, | |
8c99fdce LB |
1847 | { |
1848 | .callback = thermal_nocrt, | |
1849 | .ident = "Gigabyte GA-7ZX", | |
1850 | .matches = { | |
1851 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1852 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1853 | }, | |
1854 | }, | |
0b5bfa1c LB |
1855 | {} |
1856 | }; | |
0b5bfa1c | 1857 | |
4be44fcd | 1858 | static int __init acpi_thermal_init(void) |
1da177e4 | 1859 | { |
4be44fcd | 1860 | int result = 0; |
1da177e4 | 1861 | |
0b5bfa1c LB |
1862 | dmi_check_system(thermal_dmi_table); |
1863 | ||
72b33ef8 LB |
1864 | if (off) { |
1865 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1866 | return -ENODEV; | |
1867 | } | |
1da177e4 LT |
1868 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1869 | if (!acpi_thermal_dir) | |
d550d98d | 1870 | return -ENODEV; |
1da177e4 LT |
1871 | acpi_thermal_dir->owner = THIS_MODULE; |
1872 | ||
1873 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1874 | if (result < 0) { | |
1875 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1876 | return -ENODEV; |
1da177e4 LT |
1877 | } |
1878 | ||
d550d98d | 1879 | return 0; |
1da177e4 LT |
1880 | } |
1881 | ||
4be44fcd | 1882 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1883 | { |
1da177e4 LT |
1884 | |
1885 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1886 | ||
1887 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1888 | ||
d550d98d | 1889 | return; |
1da177e4 LT |
1890 | } |
1891 | ||
1da177e4 LT |
1892 | module_init(acpi_thermal_init); |
1893 | module_exit(acpi_thermal_exit); |