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1da177e4 LT |
1 | /* |
2 | * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | * | |
25 | * This driver fully implements the ACPI thermal policy as described in the | |
26 | * ACPI 2.0 Specification. | |
27 | * | |
28 | * TBD: 1. Implement passive cooling hysteresis. | |
29 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
30 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/kernel.h> | |
35 | #include <linux/module.h> | |
0b5bfa1c | 36 | #include <linux/dmi.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/types.h> | |
39 | #include <linux/proc_fs.h> | |
cd354f1a TS |
40 | #include <linux/timer.h> |
41 | #include <linux/jiffies.h> | |
1da177e4 LT |
42 | #include <linux/kmod.h> |
43 | #include <linux/seq_file.h> | |
10a0a8d4 | 44 | #include <linux/reboot.h> |
1da177e4 | 45 | #include <asm/uaccess.h> |
3f655ef8 | 46 | #include <linux/thermal.h> |
1da177e4 LT |
47 | #include <acpi/acpi_bus.h> |
48 | #include <acpi/acpi_drivers.h> | |
49 | ||
50 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
51 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
1da177e4 LT |
52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
53 | #define ACPI_THERMAL_FILE_STATE "state" | |
54 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
55 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
56 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
57 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
58 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
59 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
60 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
61 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
62 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
63 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
64 | |
65 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
66 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
67 | ||
1da177e4 | 68 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 69 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 70 | |
1cbf4c56 | 71 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 72 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
73 | MODULE_LICENSE("GPL"); |
74 | ||
f8707ec9 LB |
75 | static int act; |
76 | module_param(act, int, 0644); | |
3c1d36da | 77 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 78 | |
c52a7419 LB |
79 | static int crt; |
80 | module_param(crt, int, 0644); | |
81 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
82 | ||
1da177e4 | 83 | static int tzp; |
730ff34d | 84 | module_param(tzp, int, 0444); |
3c1d36da | 85 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 86 | |
f5487145 LB |
87 | static int nocrt; |
88 | module_param(nocrt, int, 0); | |
8c99fdce | 89 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 90 | |
72b33ef8 LB |
91 | static int off; |
92 | module_param(off, int, 0); | |
3c1d36da | 93 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 94 | |
a70cdc52 LB |
95 | static int psv; |
96 | module_param(psv, int, 0644); | |
3c1d36da | 97 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 98 | |
4be44fcd LB |
99 | static int acpi_thermal_add(struct acpi_device *device); |
100 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 101 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
102 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
103 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
104 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 105 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
106 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
107 | const char __user *, size_t, | |
108 | loff_t *); | |
1da177e4 | 109 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
110 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
111 | size_t, loff_t *); | |
1da177e4 | 112 | |
1ba90e3a TR |
113 | static const struct acpi_device_id thermal_device_ids[] = { |
114 | {ACPI_THERMAL_HID, 0}, | |
115 | {"", 0}, | |
116 | }; | |
117 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
118 | ||
1da177e4 | 119 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 120 | .name = "thermal", |
4be44fcd | 121 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 122 | .ids = thermal_device_ids, |
4be44fcd LB |
123 | .ops = { |
124 | .add = acpi_thermal_add, | |
125 | .remove = acpi_thermal_remove, | |
74ce1468 | 126 | .resume = acpi_thermal_resume, |
4be44fcd | 127 | }, |
1da177e4 LT |
128 | }; |
129 | ||
130 | struct acpi_thermal_state { | |
4be44fcd LB |
131 | u8 critical:1; |
132 | u8 hot:1; | |
133 | u8 passive:1; | |
134 | u8 active:1; | |
135 | u8 reserved:4; | |
136 | int active_index; | |
1da177e4 LT |
137 | }; |
138 | ||
139 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
140 | u8 valid:1; |
141 | u8 enabled:1; | |
142 | u8 reserved:6; | |
1da177e4 LT |
143 | }; |
144 | ||
145 | struct acpi_thermal_critical { | |
146 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 147 | unsigned long temperature; |
1da177e4 LT |
148 | }; |
149 | ||
150 | struct acpi_thermal_hot { | |
151 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 152 | unsigned long temperature; |
1da177e4 LT |
153 | }; |
154 | ||
155 | struct acpi_thermal_passive { | |
156 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
157 | unsigned long temperature; |
158 | unsigned long tc1; | |
159 | unsigned long tc2; | |
160 | unsigned long tsp; | |
161 | struct acpi_handle_list devices; | |
1da177e4 LT |
162 | }; |
163 | ||
164 | struct acpi_thermal_active { | |
165 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
166 | unsigned long temperature; |
167 | struct acpi_handle_list devices; | |
1da177e4 LT |
168 | }; |
169 | ||
170 | struct acpi_thermal_trips { | |
171 | struct acpi_thermal_critical critical; | |
4be44fcd | 172 | struct acpi_thermal_hot hot; |
1da177e4 LT |
173 | struct acpi_thermal_passive passive; |
174 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
175 | }; | |
176 | ||
177 | struct acpi_thermal_flags { | |
4be44fcd LB |
178 | u8 cooling_mode:1; /* _SCP */ |
179 | u8 devices:1; /* _TZD */ | |
180 | u8 reserved:6; | |
1da177e4 LT |
181 | }; |
182 | ||
183 | struct acpi_thermal { | |
8348e1b1 | 184 | struct acpi_device * device; |
4be44fcd LB |
185 | acpi_bus_id name; |
186 | unsigned long temperature; | |
187 | unsigned long last_temperature; | |
188 | unsigned long polling_frequency; | |
4be44fcd | 189 | volatile u8 zombie; |
1da177e4 LT |
190 | struct acpi_thermal_flags flags; |
191 | struct acpi_thermal_state state; | |
192 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
193 | struct acpi_handle_list devices; |
194 | struct timer_list timer; | |
3f655ef8 ZR |
195 | struct thermal_zone_device *thermal_zone; |
196 | int tz_enabled; | |
6e215785 | 197 | struct mutex lock; |
1da177e4 LT |
198 | }; |
199 | ||
d7508032 | 200 | static const struct file_operations acpi_thermal_state_fops = { |
cf7acfab | 201 | .owner = THIS_MODULE, |
4be44fcd LB |
202 | .open = acpi_thermal_state_open_fs, |
203 | .read = seq_read, | |
204 | .llseek = seq_lseek, | |
205 | .release = single_release, | |
1da177e4 LT |
206 | }; |
207 | ||
d7508032 | 208 | static const struct file_operations acpi_thermal_temp_fops = { |
cf7acfab | 209 | .owner = THIS_MODULE, |
4be44fcd LB |
210 | .open = acpi_thermal_temp_open_fs, |
211 | .read = seq_read, | |
212 | .llseek = seq_lseek, | |
213 | .release = single_release, | |
1da177e4 LT |
214 | }; |
215 | ||
d7508032 | 216 | static const struct file_operations acpi_thermal_trip_fops = { |
cf7acfab | 217 | .owner = THIS_MODULE, |
4be44fcd LB |
218 | .open = acpi_thermal_trip_open_fs, |
219 | .read = seq_read, | |
4be44fcd LB |
220 | .llseek = seq_lseek, |
221 | .release = single_release, | |
1da177e4 LT |
222 | }; |
223 | ||
d7508032 | 224 | static const struct file_operations acpi_thermal_cooling_fops = { |
cf7acfab | 225 | .owner = THIS_MODULE, |
4be44fcd LB |
226 | .open = acpi_thermal_cooling_open_fs, |
227 | .read = seq_read, | |
228 | .write = acpi_thermal_write_cooling_mode, | |
229 | .llseek = seq_lseek, | |
230 | .release = single_release, | |
1da177e4 LT |
231 | }; |
232 | ||
d7508032 | 233 | static const struct file_operations acpi_thermal_polling_fops = { |
cf7acfab | 234 | .owner = THIS_MODULE, |
4be44fcd LB |
235 | .open = acpi_thermal_polling_open_fs, |
236 | .read = seq_read, | |
237 | .write = acpi_thermal_write_polling, | |
238 | .llseek = seq_lseek, | |
239 | .release = single_release, | |
1da177e4 LT |
240 | }; |
241 | ||
242 | /* -------------------------------------------------------------------------- | |
243 | Thermal Zone Management | |
244 | -------------------------------------------------------------------------- */ | |
245 | ||
4be44fcd | 246 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 247 | { |
4be44fcd | 248 | acpi_status status = AE_OK; |
1da177e4 | 249 | |
1da177e4 LT |
250 | |
251 | if (!tz) | |
d550d98d | 252 | return -EINVAL; |
1da177e4 LT |
253 | |
254 | tz->last_temperature = tz->temperature; | |
255 | ||
4be44fcd | 256 | status = |
38ba7c9e | 257 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 258 | if (ACPI_FAILURE(status)) |
d550d98d | 259 | return -ENODEV; |
1da177e4 | 260 | |
4be44fcd LB |
261 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
262 | tz->temperature)); | |
1da177e4 | 263 | |
d550d98d | 264 | return 0; |
1da177e4 LT |
265 | } |
266 | ||
4be44fcd | 267 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 268 | { |
4be44fcd | 269 | acpi_status status = AE_OK; |
1da177e4 | 270 | |
1da177e4 LT |
271 | |
272 | if (!tz) | |
d550d98d | 273 | return -EINVAL; |
1da177e4 | 274 | |
4be44fcd | 275 | status = |
38ba7c9e | 276 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 277 | &tz->polling_frequency); |
1da177e4 | 278 | if (ACPI_FAILURE(status)) |
d550d98d | 279 | return -ENODEV; |
1da177e4 | 280 | |
4be44fcd LB |
281 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
282 | tz->polling_frequency)); | |
1da177e4 | 283 | |
d550d98d | 284 | return 0; |
1da177e4 LT |
285 | } |
286 | ||
4be44fcd | 287 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 288 | { |
1da177e4 LT |
289 | |
290 | if (!tz) | |
d550d98d | 291 | return -EINVAL; |
1da177e4 LT |
292 | |
293 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
294 | ||
4be44fcd LB |
295 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
296 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 297 | tz->polling_frequency/10)); |
1da177e4 | 298 | |
d550d98d | 299 | return 0; |
1da177e4 LT |
300 | } |
301 | ||
4be44fcd | 302 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 303 | { |
4be44fcd LB |
304 | acpi_status status = AE_OK; |
305 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
306 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
307 | acpi_handle handle = NULL; | |
1da177e4 | 308 | |
1da177e4 LT |
309 | |
310 | if (!tz) | |
d550d98d | 311 | return -EINVAL; |
1da177e4 | 312 | |
38ba7c9e | 313 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
314 | if (ACPI_FAILURE(status)) { |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 316 | return -ENODEV; |
1da177e4 LT |
317 | } |
318 | ||
319 | arg0.integer.value = mode; | |
320 | ||
321 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
322 | if (ACPI_FAILURE(status)) | |
d550d98d | 323 | return -ENODEV; |
1da177e4 | 324 | |
d550d98d | 325 | return 0; |
1da177e4 LT |
326 | } |
327 | ||
ce44e197 ZR |
328 | #define ACPI_TRIPS_CRITICAL 0x01 |
329 | #define ACPI_TRIPS_HOT 0x02 | |
330 | #define ACPI_TRIPS_PASSIVE 0x04 | |
331 | #define ACPI_TRIPS_ACTIVE 0x08 | |
332 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 333 | |
ce44e197 ZR |
334 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
335 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 336 | |
ce44e197 ZR |
337 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
338 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
339 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 340 | |
ce44e197 ZR |
341 | /* |
342 | * This exception is thrown out in two cases: | |
343 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
344 | * when re-evaluating the AML code. | |
345 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
346 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
347 | */ | |
348 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
349 | do { \ | |
350 | if (flags != ACPI_TRIPS_INIT) \ | |
351 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
352 | "ACPI thermal trip point %s changed\n" \ | |
353 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
354 | } while (0) | |
355 | ||
356 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
357 | { | |
358 | acpi_status status = AE_OK; | |
359 | struct acpi_handle_list devices; | |
360 | int valid = 0; | |
361 | int i; | |
1da177e4 | 362 | |
ce44e197 ZR |
363 | /* Critical Shutdown (required) */ |
364 | if (flag & ACPI_TRIPS_CRITICAL) { | |
365 | status = acpi_evaluate_integer(tz->device->handle, | |
366 | "_CRT", NULL, &tz->trips.critical.temperature); | |
a39a2d7c AV |
367 | /* |
368 | * Treat freezing temperatures as invalid as well; some | |
369 | * BIOSes return really low values and cause reboots at startup. | |
370 | * Below zero (Celcius) values clearly aren't right for sure.. | |
371 | * ... so lets discard those as invalid. | |
372 | */ | |
373 | if (ACPI_FAILURE(status) || | |
374 | tz->trips.critical.temperature <= 2732) { | |
c52a7419 | 375 | tz->trips.critical.flags.valid = 0; |
ce44e197 | 376 | ACPI_EXCEPTION((AE_INFO, status, |
a39a2d7c | 377 | "No or invalid critical threshold")); |
ce44e197 ZR |
378 | return -ENODEV; |
379 | } else { | |
380 | tz->trips.critical.flags.valid = 1; | |
381 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
382 | "Found critical threshold [%lu]\n", | |
383 | tz->trips.critical.temperature)); | |
384 | } | |
385 | if (tz->trips.critical.flags.valid == 1) { | |
386 | if (crt == -1) { | |
387 | tz->trips.critical.flags.valid = 0; | |
388 | } else if (crt > 0) { | |
389 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
390 | /* | |
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, |
ce44e197 ZR |
404 | "_HOT", NULL, &tz->trips.hot.temperature); |
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 { | |
410 | tz->trips.hot.flags.valid = 1; | |
411 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
412 | "Found hot threshold [%lu]\n", | |
413 | tz->trips.critical.temperature)); | |
414 | } | |
a70cdc52 LB |
415 | } |
416 | ||
ce44e197 ZR |
417 | /* Passive (optional) */ |
418 | if (flag & ACPI_TRIPS_PASSIVE) { | |
419 | valid = tz->trips.passive.flags.valid; | |
420 | if (psv == -1) { | |
421 | status = AE_SUPPORT; | |
422 | } else if (psv > 0) { | |
423 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
424 | status = AE_OK; | |
425 | } else { | |
426 | status = acpi_evaluate_integer(tz->device->handle, | |
427 | "_PSV", NULL, &tz->trips.passive.temperature); | |
428 | } | |
1da177e4 | 429 | |
1da177e4 LT |
430 | if (ACPI_FAILURE(status)) |
431 | tz->trips.passive.flags.valid = 0; | |
ce44e197 ZR |
432 | else { |
433 | tz->trips.passive.flags.valid = 1; | |
434 | if (flag == ACPI_TRIPS_INIT) { | |
435 | status = acpi_evaluate_integer( | |
436 | tz->device->handle, "_TC1", | |
437 | NULL, &tz->trips.passive.tc1); | |
438 | if (ACPI_FAILURE(status)) | |
439 | tz->trips.passive.flags.valid = 0; | |
440 | status = acpi_evaluate_integer( | |
441 | tz->device->handle, "_TC2", | |
442 | NULL, &tz->trips.passive.tc2); | |
443 | if (ACPI_FAILURE(status)) | |
444 | tz->trips.passive.flags.valid = 0; | |
445 | status = acpi_evaluate_integer( | |
446 | tz->device->handle, "_TSP", | |
447 | NULL, &tz->trips.passive.tsp); | |
448 | if (ACPI_FAILURE(status)) | |
449 | tz->trips.passive.flags.valid = 0; | |
450 | } | |
451 | } | |
452 | } | |
453 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
454 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
455 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
456 | NULL, &devices); | |
1da177e4 LT |
457 | if (ACPI_FAILURE(status)) |
458 | tz->trips.passive.flags.valid = 0; | |
1da177e4 | 459 | else |
ce44e197 | 460 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 461 | |
ce44e197 ZR |
462 | if (memcmp(&tz->trips.passive.devices, &devices, |
463 | sizeof(struct acpi_handle_list))) { | |
464 | memcpy(&tz->trips.passive.devices, &devices, | |
465 | sizeof(struct acpi_handle_list)); | |
466 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
467 | } | |
468 | } | |
469 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
470 | if (valid != tz->trips.passive.flags.valid) | |
471 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
472 | } | |
1da177e4 | 473 | |
ce44e197 | 474 | /* Active (optional) */ |
4be44fcd | 475 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 476 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 477 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 478 | |
f8707ec9 | 479 | if (act == -1) |
ce44e197 ZR |
480 | break; /* disable all active trip points */ |
481 | ||
482 | if (flag & ACPI_TRIPS_ACTIVE) { | |
483 | status = acpi_evaluate_integer(tz->device->handle, | |
484 | name, NULL, &tz->trips.active[i].temperature); | |
485 | if (ACPI_FAILURE(status)) { | |
486 | tz->trips.active[i].flags.valid = 0; | |
487 | if (i == 0) | |
488 | break; | |
489 | if (act <= 0) | |
490 | break; | |
491 | if (i == 1) | |
492 | tz->trips.active[0].temperature = | |
493 | CELSIUS_TO_KELVIN(act); | |
494 | else | |
495 | /* | |
496 | * Don't allow override higher than | |
497 | * the next higher trip point | |
498 | */ | |
499 | tz->trips.active[i - 1].temperature = | |
500 | (tz->trips.active[i - 2].temperature < | |
501 | CELSIUS_TO_KELVIN(act) ? | |
502 | tz->trips.active[i - 2].temperature : | |
503 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 504 | break; |
ce44e197 ZR |
505 | } else |
506 | tz->trips.active[i].flags.valid = 1; | |
f8707ec9 | 507 | } |
1da177e4 LT |
508 | |
509 | name[2] = 'L'; | |
ce44e197 ZR |
510 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
511 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
512 | status = acpi_evaluate_reference(tz->device->handle, | |
513 | name, NULL, &devices); | |
514 | if (ACPI_FAILURE(status)) | |
515 | tz->trips.active[i].flags.valid = 0; | |
516 | else | |
517 | tz->trips.active[i].flags.valid = 1; | |
518 | ||
519 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
520 | sizeof(struct acpi_handle_list))) { | |
521 | memcpy(&tz->trips.active[i].devices, &devices, | |
522 | sizeof(struct acpi_handle_list)); | |
523 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
524 | } | |
525 | } | |
526 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
527 | if (valid != tz->trips.active[i].flags.valid) | |
528 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
529 | ||
530 | if (!tz->trips.active[i].flags.valid) | |
531 | break; | |
532 | } | |
533 | ||
534 | if (flag & ACPI_TRIPS_DEVICES) { | |
535 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
536 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
537 | NULL, &devices); | |
538 | if (memcmp(&tz->devices, &devices, | |
539 | sizeof(struct acpi_handle_list))) { | |
540 | memcpy(&tz->devices, &devices, | |
541 | sizeof(struct acpi_handle_list)); | |
542 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
543 | } | |
1da177e4 LT |
544 | } |
545 | ||
d550d98d | 546 | return 0; |
1da177e4 LT |
547 | } |
548 | ||
ce44e197 | 549 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 550 | { |
ce44e197 | 551 | return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
1da177e4 LT |
552 | } |
553 | ||
4be44fcd | 554 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 555 | { |
223630fe | 556 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 557 | return -EINVAL; |
1da177e4 LT |
558 | |
559 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 560 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 561 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 562 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
563 | tz->trips.critical.flags.enabled = 0; |
564 | ||
14e04fb3 | 565 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 566 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
567 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
568 | tz->device->dev.bus_id, | |
569 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
570 | tz->trips.critical.flags.enabled); | |
1da177e4 | 571 | |
223630fe ZR |
572 | /* take no action if nocrt is set */ |
573 | if(!nocrt) { | |
574 | printk(KERN_EMERG | |
575 | "Critical temperature reached (%ld C), shutting down.\n", | |
576 | KELVIN_TO_CELSIUS(tz->temperature)); | |
577 | orderly_poweroff(true); | |
578 | } | |
1da177e4 | 579 | |
d550d98d | 580 | return 0; |
1da177e4 LT |
581 | } |
582 | ||
4be44fcd | 583 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 584 | { |
223630fe | 585 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 586 | return -EINVAL; |
1da177e4 LT |
587 | |
588 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 589 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 590 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 591 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
592 | tz->trips.hot.flags.enabled = 0; |
593 | ||
14e04fb3 | 594 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 595 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
596 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
597 | tz->device->dev.bus_id, | |
598 | ACPI_THERMAL_NOTIFY_HOT, | |
599 | tz->trips.hot.flags.enabled); | |
1da177e4 | 600 | |
223630fe | 601 | /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */ |
1da177e4 | 602 | |
d550d98d | 603 | return 0; |
1da177e4 LT |
604 | } |
605 | ||
1cbf4c56 | 606 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 607 | { |
1cbf4c56 | 608 | int result = 1; |
1da177e4 | 609 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
610 | int trend = 0; |
611 | int i = 0; | |
1da177e4 | 612 | |
1da177e4 LT |
613 | |
614 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 615 | return; |
1da177e4 LT |
616 | |
617 | passive = &(tz->trips.passive); | |
618 | ||
619 | /* | |
620 | * Above Trip? | |
621 | * ----------- | |
622 | * Calculate the thermal trend (using the passive cooling equation) | |
623 | * and modify the performance limit for all passive cooling devices | |
624 | * accordingly. Note that we assume symmetry. | |
625 | */ | |
626 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
627 | trend = |
628 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
629 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
630 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
631 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
632 | trend, passive->tc1, tz->temperature, | |
633 | tz->last_temperature, passive->tc2, | |
634 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 635 | passive->flags.enabled = 1; |
1da177e4 LT |
636 | /* Heating up? */ |
637 | if (trend > 0) | |
4be44fcd LB |
638 | for (i = 0; i < passive->devices.count; i++) |
639 | acpi_processor_set_thermal_limit(passive-> | |
640 | devices. | |
641 | handles[i], | |
642 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 643 | /* Cooling off? */ |
1cbf4c56 | 644 | else if (trend < 0) { |
4be44fcd | 645 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
646 | /* |
647 | * assume that we are on highest | |
648 | * freq/lowest thrott and can leave | |
649 | * passive mode, even in error case | |
650 | */ | |
651 | if (!acpi_processor_set_thermal_limit | |
652 | (passive->devices.handles[i], | |
653 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
654 | result = 0; | |
655 | /* | |
656 | * Leave cooling mode, even if the temp might | |
657 | * higher than trip point This is because some | |
658 | * machines might have long thermal polling | |
659 | * frequencies (tsp) defined. We will fall back | |
660 | * into passive mode in next cycle (probably quicker) | |
661 | */ | |
662 | if (result) { | |
663 | passive->flags.enabled = 0; | |
664 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
665 | "Disabling passive cooling, still above threshold," | |
666 | " but we are cooling down\n")); | |
667 | } | |
668 | } | |
669 | return; | |
1da177e4 LT |
670 | } |
671 | ||
672 | /* | |
673 | * Below Trip? | |
674 | * ----------- | |
675 | * Implement passive cooling hysteresis to slowly increase performance | |
676 | * and avoid thrashing around the passive trip point. Note that we | |
677 | * assume symmetry. | |
678 | */ | |
1cbf4c56 TR |
679 | if (!passive->flags.enabled) |
680 | return; | |
681 | for (i = 0; i < passive->devices.count; i++) | |
682 | if (!acpi_processor_set_thermal_limit | |
683 | (passive->devices.handles[i], | |
684 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
685 | result = 0; | |
686 | if (result) { | |
687 | passive->flags.enabled = 0; | |
688 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
689 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 690 | } |
1da177e4 LT |
691 | } |
692 | ||
1cbf4c56 | 693 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 694 | { |
4be44fcd | 695 | int result = 0; |
1da177e4 | 696 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
697 | int i = 0; |
698 | int j = 0; | |
699 | unsigned long maxtemp = 0; | |
1da177e4 | 700 | |
1da177e4 LT |
701 | |
702 | if (!tz) | |
1cbf4c56 | 703 | return; |
1da177e4 | 704 | |
4be44fcd | 705 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
706 | active = &(tz->trips.active[i]); |
707 | if (!active || !active->flags.valid) | |
708 | break; | |
1da177e4 | 709 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
710 | /* |
711 | * Above Threshold? | |
712 | * ---------------- | |
713 | * If not already enabled, turn ON all cooling devices | |
714 | * associated with this active threshold. | |
715 | */ | |
1da177e4 | 716 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
717 | tz->state.active_index = i; |
718 | maxtemp = active->temperature; | |
719 | if (active->flags.enabled) | |
720 | continue; | |
1da177e4 | 721 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
722 | result = |
723 | acpi_bus_set_power(active->devices. | |
724 | handles[j], | |
1cbf4c56 | 725 | ACPI_STATE_D0); |
1da177e4 | 726 | if (result) { |
cece9296 LB |
727 | printk(KERN_WARNING PREFIX |
728 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 729 | active->devices. |
cece9296 | 730 | handles[j]); |
1da177e4 LT |
731 | continue; |
732 | } | |
1cbf4c56 | 733 | active->flags.enabled = 1; |
4be44fcd | 734 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 735 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 736 | active->devices.handles[j])); |
1da177e4 | 737 | } |
1cbf4c56 TR |
738 | continue; |
739 | } | |
740 | if (!active->flags.enabled) | |
741 | continue; | |
742 | /* | |
743 | * Below Threshold? | |
744 | * ---------------- | |
745 | * Turn OFF all cooling devices associated with this | |
746 | * threshold. | |
747 | */ | |
748 | for (j = 0; j < active->devices.count; j++) { | |
749 | result = acpi_bus_set_power(active->devices.handles[j], | |
750 | ACPI_STATE_D3); | |
751 | if (result) { | |
cece9296 LB |
752 | printk(KERN_WARNING PREFIX |
753 | "Unable to turn cooling device [%p] 'off'\n", | |
754 | active->devices.handles[j]); | |
1cbf4c56 TR |
755 | continue; |
756 | } | |
757 | active->flags.enabled = 0; | |
758 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
759 | "Cooling device [%p] now 'off'\n", | |
760 | active->devices.handles[j])); | |
1da177e4 LT |
761 | } |
762 | } | |
1da177e4 LT |
763 | } |
764 | ||
4be44fcd | 765 | static void acpi_thermal_check(void *context); |
1da177e4 | 766 | |
4be44fcd | 767 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
768 | { |
769 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
770 | if (!tz->zombie) | |
b8d35192 | 771 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
772 | } |
773 | ||
ea51011a ZY |
774 | static void acpi_thermal_active_off(void *data) |
775 | { | |
776 | int result = 0; | |
777 | struct acpi_thermal *tz = data; | |
778 | int i = 0; | |
779 | int j = 0; | |
780 | struct acpi_thermal_active *active = NULL; | |
781 | ||
782 | if (!tz) { | |
783 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
784 | return; | |
785 | } | |
786 | ||
787 | result = acpi_thermal_get_temperature(tz); | |
788 | if (result) | |
789 | return; | |
790 | ||
791 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
792 | active = &(tz->trips.active[i]); | |
793 | if (!active || !active->flags.valid) | |
794 | break; | |
795 | if (tz->temperature >= active->temperature) { | |
796 | /* | |
797 | * If the thermal temperature is greater than the | |
798 | * active threshod, unnecessary to turn off the | |
799 | * the active cooling device. | |
800 | */ | |
801 | continue; | |
802 | } | |
803 | /* | |
804 | * Below Threshold? | |
805 | * ---------------- | |
806 | * Turn OFF all cooling devices associated with this | |
807 | * threshold. | |
808 | */ | |
809 | for (j = 0; j < active->devices.count; j++) | |
810 | result = acpi_bus_set_power(active->devices.handles[j], | |
811 | ACPI_STATE_D3); | |
812 | } | |
813 | } | |
814 | ||
4be44fcd | 815 | static void acpi_thermal_check(void *data) |
1da177e4 | 816 | { |
4be44fcd | 817 | int result = 0; |
50dd0969 | 818 | struct acpi_thermal *tz = data; |
4be44fcd | 819 | unsigned long sleep_time = 0; |
21bc42ab | 820 | unsigned long timeout_jiffies = 0; |
4be44fcd | 821 | int i = 0; |
1da177e4 LT |
822 | struct acpi_thermal_state state; |
823 | ||
1da177e4 LT |
824 | |
825 | if (!tz) { | |
6468463a | 826 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 827 | return; |
1da177e4 LT |
828 | } |
829 | ||
6e215785 AS |
830 | /* Check if someone else is already running */ |
831 | if (!mutex_trylock(&tz->lock)) | |
832 | return; | |
833 | ||
1da177e4 LT |
834 | state = tz->state; |
835 | ||
836 | result = acpi_thermal_get_temperature(tz); | |
837 | if (result) | |
6e215785 | 838 | goto unlock; |
4be44fcd | 839 | |
3f655ef8 ZR |
840 | if (!tz->tz_enabled) |
841 | goto unlock; | |
842 | ||
1da177e4 | 843 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 844 | |
1da177e4 LT |
845 | /* |
846 | * Check Trip Points | |
847 | * ----------------- | |
848 | * Compare the current temperature to the trip point values to see | |
849 | * if we've entered one of the thermal policy states. Note that | |
850 | * this function determines when a state is entered, but the | |
851 | * individual policy decides when it is exited (e.g. hysteresis). | |
852 | */ | |
853 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
854 | state.critical |= |
855 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
856 | if (tz->trips.hot.flags.valid) |
857 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
858 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
859 | state.passive |= |
860 | (tz->temperature >= tz->trips.passive.temperature); | |
861 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 862 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
863 | state.active |= |
864 | (tz->temperature >= | |
865 | tz->trips.active[i].temperature); | |
1da177e4 LT |
866 | |
867 | /* | |
868 | * Invoke Policy | |
869 | * ------------- | |
870 | * Separated from the above check to allow individual policy to | |
871 | * determine when to exit a given state. | |
872 | */ | |
873 | if (state.critical) | |
874 | acpi_thermal_critical(tz); | |
875 | if (state.hot) | |
876 | acpi_thermal_hot(tz); | |
877 | if (state.passive) | |
878 | acpi_thermal_passive(tz); | |
879 | if (state.active) | |
880 | acpi_thermal_active(tz); | |
881 | ||
882 | /* | |
883 | * Calculate State | |
884 | * --------------- | |
885 | * Again, separated from the above two to allow independent policy | |
886 | * decisions. | |
887 | */ | |
1cbf4c56 TR |
888 | tz->state.critical = tz->trips.critical.flags.enabled; |
889 | tz->state.hot = tz->trips.hot.flags.enabled; | |
890 | tz->state.passive = tz->trips.passive.flags.enabled; | |
891 | tz->state.active = 0; | |
4be44fcd | 892 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 893 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
894 | |
895 | /* | |
896 | * Calculate Sleep Time | |
897 | * -------------------- | |
898 | * If we're in the passive state, use _TSP's value. Otherwise | |
899 | * use the default polling frequency (e.g. _TZP). If no polling | |
900 | * frequency is specified then we'll wait forever (at least until | |
901 | * a thermal event occurs). Note that _TSP and _TZD values are | |
902 | * given in 1/10th seconds (we must covert to milliseconds). | |
903 | */ | |
21bc42ab | 904 | if (tz->state.passive) { |
1da177e4 | 905 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
906 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
907 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 908 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
909 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
910 | } | |
1da177e4 | 911 | |
4be44fcd LB |
912 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
913 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
914 | |
915 | /* | |
916 | * Schedule Next Poll | |
917 | * ------------------ | |
918 | */ | |
919 | if (!sleep_time) { | |
920 | if (timer_pending(&(tz->timer))) | |
921 | del_timer(&(tz->timer)); | |
4be44fcd | 922 | } else { |
1da177e4 | 923 | if (timer_pending(&(tz->timer))) |
21bc42ab | 924 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 925 | else { |
4be44fcd | 926 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 927 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 928 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
929 | add_timer(&(tz->timer)); |
930 | } | |
931 | } | |
6e215785 AS |
932 | unlock: |
933 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
934 | } |
935 | ||
3f655ef8 | 936 | /* sys I/F for generic thermal sysfs support */ |
5e012760 ZR |
937 | #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200) |
938 | ||
3f655ef8 ZR |
939 | static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) |
940 | { | |
941 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 942 | int result; |
3f655ef8 ZR |
943 | |
944 | if (!tz) | |
945 | return -EINVAL; | |
946 | ||
76ecb4f2 ZR |
947 | result = acpi_thermal_get_temperature(tz); |
948 | if (result) | |
949 | return result; | |
950 | ||
5e012760 | 951 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature)); |
3f655ef8 ZR |
952 | } |
953 | ||
954 | static const char enabled[] = "kernel"; | |
955 | static const char disabled[] = "user"; | |
956 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
957 | char *buf) | |
958 | { | |
959 | struct acpi_thermal *tz = thermal->devdata; | |
960 | ||
961 | if (!tz) | |
962 | return -EINVAL; | |
963 | ||
964 | return sprintf(buf, "%s\n", tz->tz_enabled ? | |
965 | enabled : disabled); | |
966 | } | |
967 | ||
968 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
969 | const char *buf) | |
970 | { | |
971 | struct acpi_thermal *tz = thermal->devdata; | |
972 | int enable; | |
973 | ||
974 | if (!tz) | |
975 | return -EINVAL; | |
976 | ||
977 | /* | |
978 | * enable/disable thermal management from ACPI thermal driver | |
979 | */ | |
980 | if (!strncmp(buf, enabled, sizeof enabled - 1)) | |
981 | enable = 1; | |
982 | else if (!strncmp(buf, disabled, sizeof disabled - 1)) | |
983 | enable = 0; | |
984 | else | |
985 | return -EINVAL; | |
986 | ||
987 | if (enable != tz->tz_enabled) { | |
988 | tz->tz_enabled = enable; | |
989 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
990 | "%s ACPI thermal control\n", | |
991 | tz->tz_enabled ? enabled : disabled)); | |
992 | acpi_thermal_check(tz); | |
993 | } | |
994 | return 0; | |
995 | } | |
996 | ||
997 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
998 | int trip, char *buf) | |
999 | { | |
1000 | struct acpi_thermal *tz = thermal->devdata; | |
1001 | int i; | |
1002 | ||
1003 | if (!tz || trip < 0) | |
1004 | return -EINVAL; | |
1005 | ||
1006 | if (tz->trips.critical.flags.valid) { | |
1007 | if (!trip) | |
1008 | return sprintf(buf, "critical\n"); | |
1009 | trip--; | |
1010 | } | |
1011 | ||
1012 | if (tz->trips.hot.flags.valid) { | |
1013 | if (!trip) | |
1014 | return sprintf(buf, "hot\n"); | |
1015 | trip--; | |
1016 | } | |
1017 | ||
1018 | if (tz->trips.passive.flags.valid) { | |
1019 | if (!trip) | |
1020 | return sprintf(buf, "passive\n"); | |
1021 | trip--; | |
1022 | } | |
1023 | ||
1024 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1025 | tz->trips.active[i].flags.valid; i++) { | |
1026 | if (!trip) | |
1027 | return sprintf(buf, "active%d\n", i); | |
1028 | trip--; | |
1029 | } | |
1030 | ||
1031 | return -EINVAL; | |
1032 | } | |
1033 | ||
1034 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
1035 | int trip, char *buf) | |
1036 | { | |
1037 | struct acpi_thermal *tz = thermal->devdata; | |
1038 | int i; | |
1039 | ||
1040 | if (!tz || trip < 0) | |
1041 | return -EINVAL; | |
1042 | ||
1043 | if (tz->trips.critical.flags.valid) { | |
1044 | if (!trip) | |
5e012760 | 1045 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1046 | tz->trips.critical.temperature)); |
1047 | trip--; | |
1048 | } | |
1049 | ||
1050 | if (tz->trips.hot.flags.valid) { | |
1051 | if (!trip) | |
5e012760 | 1052 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1053 | tz->trips.hot.temperature)); |
1054 | trip--; | |
1055 | } | |
1056 | ||
1057 | if (tz->trips.passive.flags.valid) { | |
1058 | if (!trip) | |
5e012760 | 1059 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1060 | tz->trips.passive.temperature)); |
1061 | trip--; | |
1062 | } | |
1063 | ||
1064 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1065 | tz->trips.active[i].flags.valid; i++) { | |
1066 | if (!trip) | |
5e012760 | 1067 | return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS( |
3f655ef8 ZR |
1068 | tz->trips.active[i].temperature)); |
1069 | trip--; | |
1070 | } | |
1071 | ||
1072 | return -EINVAL; | |
1073 | } | |
1074 | ||
9ec732ff ZR |
1075 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
1076 | unsigned long *temperature) { | |
1077 | struct acpi_thermal *tz = thermal->devdata; | |
1078 | ||
1079 | if (tz->trips.critical.flags.valid) { | |
1080 | *temperature = KELVIN_TO_MILLICELSIUS( | |
1081 | tz->trips.critical.temperature); | |
1082 | return 0; | |
1083 | } else | |
1084 | return -EINVAL; | |
1085 | } | |
1086 | ||
3f655ef8 ZR |
1087 | typedef int (*cb)(struct thermal_zone_device *, int, |
1088 | struct thermal_cooling_device *); | |
1089 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
1090 | struct thermal_cooling_device *cdev, | |
1091 | cb action) | |
1092 | { | |
1093 | struct acpi_device *device = cdev->devdata; | |
1094 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
1095 | struct acpi_device *dev; |
1096 | acpi_status status; | |
1097 | acpi_handle handle; | |
3f655ef8 ZR |
1098 | int i; |
1099 | int j; | |
1100 | int trip = -1; | |
1101 | int result = 0; | |
1102 | ||
1103 | if (tz->trips.critical.flags.valid) | |
1104 | trip++; | |
1105 | ||
1106 | if (tz->trips.hot.flags.valid) | |
1107 | trip++; | |
1108 | ||
1109 | if (tz->trips.passive.flags.valid) { | |
1110 | trip++; | |
1111 | for (i = 0; i < tz->trips.passive.devices.count; | |
1112 | i++) { | |
653a00c9 ZR |
1113 | handle = tz->trips.passive.devices.handles[i]; |
1114 | status = acpi_bus_get_device(handle, &dev); | |
1115 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1116 | result = action(thermal, trip, cdev); | |
1117 | if (result) | |
1118 | goto failed; | |
1119 | } | |
3f655ef8 ZR |
1120 | } |
1121 | } | |
1122 | ||
1123 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1124 | if (!tz->trips.active[i].flags.valid) | |
1125 | break; | |
1126 | trip++; | |
1127 | for (j = 0; | |
1128 | j < tz->trips.active[i].devices.count; | |
1129 | j++) { | |
653a00c9 ZR |
1130 | handle = tz->trips.active[i].devices.handles[j]; |
1131 | status = acpi_bus_get_device(handle, &dev); | |
1132 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1133 | result = action(thermal, trip, cdev); | |
1134 | if (result) | |
1135 | goto failed; | |
1136 | } | |
3f655ef8 ZR |
1137 | } |
1138 | } | |
1139 | ||
1140 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
1141 | handle = tz->devices.handles[i]; |
1142 | status = acpi_bus_get_device(handle, &dev); | |
1143 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
1144 | result = action(thermal, -1, cdev); | |
1145 | if (result) | |
1146 | goto failed; | |
1147 | } | |
3f655ef8 ZR |
1148 | } |
1149 | ||
1150 | failed: | |
1151 | return result; | |
1152 | } | |
1153 | ||
1154 | static int | |
1155 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
1156 | struct thermal_cooling_device *cdev) | |
1157 | { | |
1158 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1159 | thermal_zone_bind_cooling_device); | |
1160 | } | |
1161 | ||
1162 | static int | |
1163 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
1164 | struct thermal_cooling_device *cdev) | |
1165 | { | |
1166 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1167 | thermal_zone_unbind_cooling_device); | |
1168 | } | |
1169 | ||
1170 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
1171 | .bind = acpi_thermal_bind_cooling_device, | |
1172 | .unbind = acpi_thermal_unbind_cooling_device, | |
1173 | .get_temp = thermal_get_temp, | |
1174 | .get_mode = thermal_get_mode, | |
1175 | .set_mode = thermal_set_mode, | |
1176 | .get_trip_type = thermal_get_trip_type, | |
1177 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 1178 | .get_crit_temp = thermal_get_crit_temp, |
3f655ef8 ZR |
1179 | }; |
1180 | ||
1181 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
1182 | { | |
1183 | int trips = 0; | |
1184 | int result; | |
20733939 | 1185 | acpi_status status; |
3f655ef8 ZR |
1186 | int i; |
1187 | ||
1188 | if (tz->trips.critical.flags.valid) | |
1189 | trips++; | |
1190 | ||
1191 | if (tz->trips.hot.flags.valid) | |
1192 | trips++; | |
1193 | ||
1194 | if (tz->trips.passive.flags.valid) | |
1195 | trips++; | |
1196 | ||
1197 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1198 | tz->trips.active[i].flags.valid; i++, trips++); | |
e9ae7107 | 1199 | tz->thermal_zone = thermal_zone_device_register("acpitz", |
3f655ef8 | 1200 | trips, tz, &acpi_thermal_zone_ops); |
bb070e43 | 1201 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
1202 | return -ENODEV; |
1203 | ||
1204 | result = sysfs_create_link(&tz->device->dev.kobj, | |
1205 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
1206 | if (result) | |
1207 | return result; | |
1208 | ||
1209 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
1210 | &tz->device->dev.kobj, "device"); | |
1211 | if (result) | |
1212 | return result; | |
1213 | ||
20733939 ZR |
1214 | status = acpi_attach_data(tz->device->handle, |
1215 | acpi_bus_private_data_handler, | |
1216 | tz->thermal_zone); | |
1217 | if (ACPI_FAILURE(status)) { | |
1218 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1219 | "Error attaching device data\n")); | |
1220 | return -ENODEV; | |
1221 | } | |
1222 | ||
3f655ef8 ZR |
1223 | tz->tz_enabled = 1; |
1224 | ||
fc3a8828 GKH |
1225 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
1226 | tz->thermal_zone->id); | |
3f655ef8 ZR |
1227 | return 0; |
1228 | } | |
1229 | ||
1230 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
1231 | { | |
1232 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
1233 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
1234 | thermal_zone_device_unregister(tz->thermal_zone); | |
1235 | tz->thermal_zone = NULL; | |
20733939 | 1236 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
1237 | } |
1238 | ||
1239 | ||
1da177e4 LT |
1240 | /* -------------------------------------------------------------------------- |
1241 | FS Interface (/proc) | |
1242 | -------------------------------------------------------------------------- */ | |
1243 | ||
4be44fcd | 1244 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
1245 | |
1246 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
1247 | { | |
50dd0969 | 1248 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1249 | |
1da177e4 LT |
1250 | |
1251 | if (!tz) | |
1252 | goto end; | |
1253 | ||
1254 | seq_puts(seq, "state: "); | |
1255 | ||
4be44fcd LB |
1256 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
1257 | && !tz->state.active) | |
1da177e4 LT |
1258 | seq_puts(seq, "ok\n"); |
1259 | else { | |
1260 | if (tz->state.critical) | |
1261 | seq_puts(seq, "critical "); | |
1262 | if (tz->state.hot) | |
1263 | seq_puts(seq, "hot "); | |
1264 | if (tz->state.passive) | |
1265 | seq_puts(seq, "passive "); | |
1266 | if (tz->state.active) | |
1267 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1268 | seq_puts(seq, "\n"); | |
1269 | } | |
1270 | ||
4be44fcd | 1271 | end: |
d550d98d | 1272 | return 0; |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1276 | { | |
1277 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1278 | } | |
1279 | ||
1da177e4 LT |
1280 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1281 | { | |
4be44fcd | 1282 | int result = 0; |
50dd0969 | 1283 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1284 | |
1da177e4 LT |
1285 | |
1286 | if (!tz) | |
1287 | goto end; | |
1288 | ||
1289 | result = acpi_thermal_get_temperature(tz); | |
1290 | if (result) | |
1291 | goto end; | |
1292 | ||
4be44fcd LB |
1293 | seq_printf(seq, "temperature: %ld C\n", |
1294 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1295 | |
4be44fcd | 1296 | end: |
d550d98d | 1297 | return 0; |
1da177e4 LT |
1298 | } |
1299 | ||
1300 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1301 | { | |
1302 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1303 | } | |
1304 | ||
1da177e4 LT |
1305 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1306 | { | |
50dd0969 | 1307 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1308 | struct acpi_device *device; |
e7c746ef TR |
1309 | acpi_status status; |
1310 | ||
4be44fcd LB |
1311 | int i = 0; |
1312 | int j = 0; | |
1da177e4 | 1313 | |
1da177e4 LT |
1314 | |
1315 | if (!tz) | |
1316 | goto end; | |
1317 | ||
1318 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1319 | seq_printf(seq, "critical (S5): %ld C%s", |
1320 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1321 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1322 | |
1323 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1324 | seq_printf(seq, "hot (S4): %ld C%s", |
1325 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1326 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1327 | |
1328 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1329 | seq_printf(seq, |
1330 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1331 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1332 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1333 | tz->trips.passive.tsp); | |
1334 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1335 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1336 | handles[j], &device); | |
1337 | seq_printf(seq, "%4.4s ", status ? "" : | |
1338 | acpi_device_bid(device)); | |
1da177e4 LT |
1339 | } |
1340 | seq_puts(seq, "\n"); | |
1341 | } | |
1342 | ||
1343 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1344 | if (!(tz->trips.active[i].flags.valid)) | |
1345 | break; | |
1346 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1347 | i, |
1348 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1349 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1350 | status = acpi_bus_get_device(tz->trips.active[i]. |
1351 | devices.handles[j], | |
1352 | &device); | |
1353 | seq_printf(seq, "%4.4s ", status ? "" : | |
1354 | acpi_device_bid(device)); | |
68ccfaa8 | 1355 | } |
1da177e4 LT |
1356 | seq_puts(seq, "\n"); |
1357 | } | |
1358 | ||
4be44fcd | 1359 | end: |
d550d98d | 1360 | return 0; |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1364 | { | |
1365 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1366 | } | |
1367 | ||
1da177e4 LT |
1368 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1369 | { | |
50dd0969 | 1370 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1371 | |
1da177e4 LT |
1372 | |
1373 | if (!tz) | |
1374 | goto end; | |
1375 | ||
eaca2d3f | 1376 | if (!tz->flags.cooling_mode) |
1da177e4 | 1377 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1378 | else |
eaca2d3f | 1379 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1380 | |
4be44fcd | 1381 | end: |
d550d98d | 1382 | return 0; |
1da177e4 LT |
1383 | } |
1384 | ||
1385 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1386 | { | |
1387 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1388 | PDE(inode)->data); |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | static ssize_t | |
4be44fcd LB |
1392 | acpi_thermal_write_cooling_mode(struct file *file, |
1393 | const char __user * buffer, | |
1394 | size_t count, loff_t * ppos) | |
1da177e4 | 1395 | { |
50dd0969 JE |
1396 | struct seq_file *m = file->private_data; |
1397 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1398 | int result = 0; |
1399 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1400 | |
1da177e4 LT |
1401 | |
1402 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1403 | return -EINVAL; |
1da177e4 LT |
1404 | |
1405 | if (!tz->flags.cooling_mode) | |
d550d98d | 1406 | return -ENODEV; |
1da177e4 LT |
1407 | |
1408 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1409 | return -EFAULT; |
4be44fcd | 1410 | |
1da177e4 | 1411 | mode_string[count] = '\0'; |
4be44fcd LB |
1412 | |
1413 | result = acpi_thermal_set_cooling_mode(tz, | |
1414 | simple_strtoul(mode_string, NULL, | |
1415 | 0)); | |
1da177e4 | 1416 | if (result) |
d550d98d | 1417 | return result; |
1da177e4 LT |
1418 | |
1419 | acpi_thermal_check(tz); | |
1420 | ||
d550d98d | 1421 | return count; |
1da177e4 LT |
1422 | } |
1423 | ||
1da177e4 LT |
1424 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1425 | { | |
50dd0969 | 1426 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1427 | |
1da177e4 LT |
1428 | |
1429 | if (!tz) | |
1430 | goto end; | |
1431 | ||
1432 | if (!tz->polling_frequency) { | |
1433 | seq_puts(seq, "<polling disabled>\n"); | |
1434 | goto end; | |
1435 | } | |
1436 | ||
1437 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1438 | (tz->polling_frequency / 10)); |
1da177e4 | 1439 | |
4be44fcd | 1440 | end: |
d550d98d | 1441 | return 0; |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1445 | { | |
1446 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1447 | PDE(inode)->data); |
1da177e4 LT |
1448 | } |
1449 | ||
1450 | static ssize_t | |
4be44fcd LB |
1451 | acpi_thermal_write_polling(struct file *file, |
1452 | const char __user * buffer, | |
1453 | size_t count, loff_t * ppos) | |
1da177e4 | 1454 | { |
50dd0969 JE |
1455 | struct seq_file *m = file->private_data; |
1456 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1457 | int result = 0; |
1458 | char polling_string[12] = { '\0' }; | |
1459 | int seconds = 0; | |
1da177e4 | 1460 | |
1da177e4 LT |
1461 | |
1462 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1463 | return -EINVAL; |
4be44fcd | 1464 | |
1da177e4 | 1465 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1466 | return -EFAULT; |
4be44fcd | 1467 | |
1da177e4 LT |
1468 | polling_string[count] = '\0'; |
1469 | ||
1470 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1471 | |
1da177e4 LT |
1472 | result = acpi_thermal_set_polling(tz, seconds); |
1473 | if (result) | |
d550d98d | 1474 | return result; |
1da177e4 LT |
1475 | |
1476 | acpi_thermal_check(tz); | |
1477 | ||
d550d98d | 1478 | return count; |
1da177e4 LT |
1479 | } |
1480 | ||
4be44fcd | 1481 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1482 | { |
4be44fcd | 1483 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1484 | |
1da177e4 LT |
1485 | |
1486 | if (!acpi_device_dir(device)) { | |
1487 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1488 | acpi_thermal_dir); |
1da177e4 | 1489 | if (!acpi_device_dir(device)) |
d550d98d | 1490 | return -ENODEV; |
1da177e4 LT |
1491 | acpi_device_dir(device)->owner = THIS_MODULE; |
1492 | } | |
1493 | ||
1494 | /* 'state' [R] */ | |
cf7acfab DL |
1495 | entry = proc_create_data(ACPI_THERMAL_FILE_STATE, |
1496 | S_IRUGO, acpi_device_dir(device), | |
1497 | &acpi_thermal_state_fops, | |
1498 | acpi_driver_data(device)); | |
1da177e4 | 1499 | if (!entry) |
d550d98d | 1500 | return -ENODEV; |
1da177e4 LT |
1501 | |
1502 | /* 'temperature' [R] */ | |
cf7acfab DL |
1503 | entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, |
1504 | S_IRUGO, acpi_device_dir(device), | |
1505 | &acpi_thermal_temp_fops, | |
1506 | acpi_driver_data(device)); | |
1da177e4 | 1507 | if (!entry) |
d550d98d | 1508 | return -ENODEV; |
1da177e4 | 1509 | |
2db9ccba | 1510 | /* 'trip_points' [R] */ |
cf7acfab DL |
1511 | entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, |
1512 | S_IRUGO, | |
1513 | acpi_device_dir(device), | |
1514 | &acpi_thermal_trip_fops, | |
1515 | acpi_driver_data(device)); | |
1da177e4 | 1516 | if (!entry) |
d550d98d | 1517 | return -ENODEV; |
1da177e4 LT |
1518 | |
1519 | /* 'cooling_mode' [R/W] */ | |
cf7acfab DL |
1520 | entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, |
1521 | S_IFREG | S_IRUGO | S_IWUSR, | |
1522 | acpi_device_dir(device), | |
1523 | &acpi_thermal_cooling_fops, | |
1524 | acpi_driver_data(device)); | |
1da177e4 | 1525 | if (!entry) |
d550d98d | 1526 | return -ENODEV; |
1da177e4 LT |
1527 | |
1528 | /* 'polling_frequency' [R/W] */ | |
cf7acfab DL |
1529 | entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, |
1530 | S_IFREG | S_IRUGO | S_IWUSR, | |
1531 | acpi_device_dir(device), | |
1532 | &acpi_thermal_polling_fops, | |
1533 | acpi_driver_data(device)); | |
1da177e4 | 1534 | if (!entry) |
d550d98d | 1535 | return -ENODEV; |
d550d98d | 1536 | return 0; |
1da177e4 LT |
1537 | } |
1538 | ||
4be44fcd | 1539 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1540 | { |
1da177e4 LT |
1541 | |
1542 | if (acpi_device_dir(device)) { | |
1543 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1544 | acpi_device_dir(device)); | |
1545 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1546 | acpi_device_dir(device)); | |
1547 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1548 | acpi_device_dir(device)); | |
1549 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1550 | acpi_device_dir(device)); | |
1551 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1552 | acpi_device_dir(device)); | |
1553 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1554 | acpi_device_dir(device) = NULL; | |
1555 | } | |
1556 | ||
d550d98d | 1557 | return 0; |
1da177e4 LT |
1558 | } |
1559 | ||
1da177e4 LT |
1560 | /* -------------------------------------------------------------------------- |
1561 | Driver Interface | |
1562 | -------------------------------------------------------------------------- */ | |
1563 | ||
4be44fcd | 1564 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1565 | { |
50dd0969 | 1566 | struct acpi_thermal *tz = data; |
4be44fcd | 1567 | struct acpi_device *device = NULL; |
1da177e4 | 1568 | |
1da177e4 LT |
1569 | |
1570 | if (!tz) | |
d550d98d | 1571 | return; |
1da177e4 | 1572 | |
8348e1b1 | 1573 | device = tz->device; |
1da177e4 LT |
1574 | |
1575 | switch (event) { | |
1576 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1577 | acpi_thermal_check(tz); | |
1578 | break; | |
1579 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1580 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1581 | acpi_thermal_check(tz); |
14e04fb3 | 1582 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1583 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1584 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1585 | break; |
1586 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1587 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1588 | acpi_thermal_check(tz); | |
14e04fb3 | 1589 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1590 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1591 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1592 | break; |
1593 | default: | |
1594 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1595 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1596 | break; |
1597 | } | |
1598 | ||
d550d98d | 1599 | return; |
1da177e4 LT |
1600 | } |
1601 | ||
4be44fcd | 1602 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1603 | { |
4be44fcd | 1604 | int result = 0; |
1da177e4 | 1605 | |
1da177e4 LT |
1606 | |
1607 | if (!tz) | |
d550d98d | 1608 | return -EINVAL; |
1da177e4 LT |
1609 | |
1610 | /* Get temperature [_TMP] (required) */ | |
1611 | result = acpi_thermal_get_temperature(tz); | |
1612 | if (result) | |
d550d98d | 1613 | return result; |
1da177e4 LT |
1614 | |
1615 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1616 | result = acpi_thermal_get_trip_points(tz); | |
1617 | if (result) | |
d550d98d | 1618 | return result; |
1da177e4 LT |
1619 | |
1620 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1621 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1622 | if (!result) |
1da177e4 | 1623 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1624 | |
1625 | /* Get default polling frequency [_TZP] (optional) */ | |
1626 | if (tzp) | |
1627 | tz->polling_frequency = tzp; | |
1628 | else | |
1629 | acpi_thermal_get_polling_frequency(tz); | |
1630 | ||
d550d98d | 1631 | return 0; |
1da177e4 LT |
1632 | } |
1633 | ||
4be44fcd | 1634 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1635 | { |
4be44fcd LB |
1636 | int result = 0; |
1637 | acpi_status status = AE_OK; | |
1638 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1639 | |
1da177e4 LT |
1640 | |
1641 | if (!device) | |
d550d98d | 1642 | return -EINVAL; |
1da177e4 | 1643 | |
36bcbec7 | 1644 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1645 | if (!tz) |
d550d98d | 1646 | return -ENOMEM; |
1da177e4 | 1647 | |
8348e1b1 | 1648 | tz->device = device; |
1da177e4 LT |
1649 | strcpy(tz->name, device->pnp.bus_id); |
1650 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1651 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1652 | device->driver_data = tz; |
6e215785 | 1653 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1654 | |
1655 | ||
1da177e4 LT |
1656 | result = acpi_thermal_get_info(tz); |
1657 | if (result) | |
3f655ef8 ZR |
1658 | goto free_memory; |
1659 | ||
1660 | result = acpi_thermal_register_thermal_zone(tz); | |
1661 | if (result) | |
1662 | goto free_memory; | |
1da177e4 LT |
1663 | |
1664 | result = acpi_thermal_add_fs(device); | |
1665 | if (result) | |
3f655ef8 | 1666 | goto unregister_thermal_zone; |
1da177e4 LT |
1667 | |
1668 | init_timer(&tz->timer); | |
1669 | ||
ea51011a ZY |
1670 | acpi_thermal_active_off(tz); |
1671 | ||
1da177e4 LT |
1672 | acpi_thermal_check(tz); |
1673 | ||
38ba7c9e | 1674 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1675 | ACPI_DEVICE_NOTIFY, |
1676 | acpi_thermal_notify, tz); | |
1da177e4 | 1677 | if (ACPI_FAILURE(status)) { |
1da177e4 | 1678 | result = -ENODEV; |
3f655ef8 | 1679 | goto remove_fs; |
1da177e4 LT |
1680 | } |
1681 | ||
1682 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1683 | acpi_device_name(device), acpi_device_bid(device), |
1684 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1685 | goto end; |
1da177e4 | 1686 | |
3f655ef8 ZR |
1687 | remove_fs: |
1688 | acpi_thermal_remove_fs(device); | |
1689 | unregister_thermal_zone: | |
1690 | thermal_zone_device_unregister(tz->thermal_zone); | |
1691 | free_memory: | |
1692 | kfree(tz); | |
1693 | end: | |
d550d98d | 1694 | return result; |
1da177e4 LT |
1695 | } |
1696 | ||
4be44fcd | 1697 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1698 | { |
4be44fcd LB |
1699 | acpi_status status = AE_OK; |
1700 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1701 | |
1da177e4 LT |
1702 | |
1703 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1704 | return -EINVAL; |
1da177e4 | 1705 | |
50dd0969 | 1706 | tz = acpi_driver_data(device); |
1da177e4 LT |
1707 | |
1708 | /* avoid timer adding new defer task */ | |
1709 | tz->zombie = 1; | |
1710 | /* wait for running timer (on other CPUs) finish */ | |
1711 | del_timer_sync(&(tz->timer)); | |
1712 | /* synchronize deferred task */ | |
1713 | acpi_os_wait_events_complete(NULL); | |
1714 | /* deferred task may reinsert timer */ | |
1715 | del_timer_sync(&(tz->timer)); | |
1716 | ||
38ba7c9e | 1717 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1718 | ACPI_DEVICE_NOTIFY, |
1719 | acpi_thermal_notify); | |
1da177e4 LT |
1720 | |
1721 | /* Terminate policy */ | |
4be44fcd | 1722 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1723 | tz->trips.passive.flags.enabled = 0; |
1724 | acpi_thermal_passive(tz); | |
1725 | } | |
1726 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1727 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1728 | tz->trips.active[0].flags.enabled = 0; |
1729 | acpi_thermal_active(tz); | |
1730 | } | |
1731 | ||
1732 | acpi_thermal_remove_fs(device); | |
3f655ef8 | 1733 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1734 | mutex_destroy(&tz->lock); |
1da177e4 | 1735 | kfree(tz); |
d550d98d | 1736 | return 0; |
1da177e4 LT |
1737 | } |
1738 | ||
5d9464a4 | 1739 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1740 | { |
1741 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1742 | int i, j, power_state, result; |
1743 | ||
74ce1468 KK |
1744 | |
1745 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1746 | return -EINVAL; |
74ce1468 | 1747 | |
50dd0969 | 1748 | tz = acpi_driver_data(device); |
74ce1468 | 1749 | |
bed936f7 | 1750 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1751 | if (!(&tz->trips.active[i])) |
1752 | break; | |
1753 | if (!tz->trips.active[i].flags.valid) | |
1754 | break; | |
1755 | tz->trips.active[i].flags.enabled = 1; | |
1756 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1757 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1758 | handles[j], &power_state); | |
1759 | if (result || (power_state != ACPI_STATE_D0)) { | |
1760 | tz->trips.active[i].flags.enabled = 0; | |
1761 | break; | |
1762 | } | |
bed936f7 | 1763 | } |
b1028c54 | 1764 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1765 | } |
1766 | ||
b1028c54 | 1767 | acpi_thermal_check(tz); |
74ce1468 KK |
1768 | |
1769 | return AE_OK; | |
1770 | } | |
1771 | ||
1855256c | 1772 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1773 | |
1774 | if (act == 0) { | |
1775 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1776 | "disabling all active thermal trip points\n", d->ident); | |
1777 | act = -1; | |
1778 | } | |
1779 | return 0; | |
1780 | } | |
1855256c | 1781 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1782 | |
1783 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1784 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1785 | nocrt = 1; | |
1786 | return 0; | |
1787 | } | |
1855256c | 1788 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1789 | |
1790 | if (tzp == 0) { | |
1791 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1792 | "enabling thermal zone polling\n", d->ident); | |
1793 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1794 | } | |
1795 | return 0; | |
1796 | } | |
1855256c | 1797 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1798 | |
1799 | if (psv == 0) { | |
1800 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1801 | "disabling all passive thermal trip points\n", d->ident); | |
1802 | psv = -1; | |
1803 | } | |
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1808 | /* | |
1809 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1810 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1811 | */ | |
1812 | { | |
1813 | .callback = thermal_act, | |
1814 | .ident = "AOpen i915GMm-HFS", | |
1815 | .matches = { | |
1816 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1817 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1818 | }, | |
1819 | }, | |
1820 | { | |
1821 | .callback = thermal_psv, | |
1822 | .ident = "AOpen i915GMm-HFS", | |
1823 | .matches = { | |
1824 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1825 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1826 | }, | |
1827 | }, | |
1828 | { | |
1829 | .callback = thermal_tzp, | |
1830 | .ident = "AOpen i915GMm-HFS", | |
1831 | .matches = { | |
1832 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1833 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1834 | }, | |
1835 | }, | |
8c99fdce LB |
1836 | { |
1837 | .callback = thermal_nocrt, | |
1838 | .ident = "Gigabyte GA-7ZX", | |
1839 | .matches = { | |
1840 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1841 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1842 | }, | |
1843 | }, | |
0b5bfa1c LB |
1844 | {} |
1845 | }; | |
0b5bfa1c | 1846 | |
4be44fcd | 1847 | static int __init acpi_thermal_init(void) |
1da177e4 | 1848 | { |
4be44fcd | 1849 | int result = 0; |
1da177e4 | 1850 | |
0b5bfa1c LB |
1851 | dmi_check_system(thermal_dmi_table); |
1852 | ||
72b33ef8 LB |
1853 | if (off) { |
1854 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1855 | return -ENODEV; | |
1856 | } | |
1da177e4 LT |
1857 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1858 | if (!acpi_thermal_dir) | |
d550d98d | 1859 | return -ENODEV; |
1da177e4 LT |
1860 | acpi_thermal_dir->owner = THIS_MODULE; |
1861 | ||
1862 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1863 | if (result < 0) { | |
1864 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1865 | return -ENODEV; |
1da177e4 LT |
1866 | } |
1867 | ||
d550d98d | 1868 | return 0; |
1da177e4 LT |
1869 | } |
1870 | ||
4be44fcd | 1871 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1872 | { |
1da177e4 LT |
1873 | |
1874 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1875 | ||
1876 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1877 | ||
d550d98d | 1878 | return; |
1da177e4 LT |
1879 | } |
1880 | ||
1da177e4 LT |
1881 | module_init(acpi_thermal_init); |
1882 | module_exit(acpi_thermal_exit); |