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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 | ||
68 | #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) | |
69 | #define CELSIUS_TO_KELVIN(t) ((t+273)*10) | |
70 | ||
71 | #define _COMPONENT ACPI_THERMAL_COMPONENT | |
f52fd66d | 72 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 73 | |
1cbf4c56 | 74 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 75 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
76 | MODULE_LICENSE("GPL"); |
77 | ||
f8707ec9 LB |
78 | static int act; |
79 | module_param(act, int, 0644); | |
3c1d36da | 80 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 81 | |
c52a7419 LB |
82 | static int crt; |
83 | module_param(crt, int, 0644); | |
84 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
85 | ||
1da177e4 | 86 | static int tzp; |
730ff34d | 87 | module_param(tzp, int, 0444); |
3c1d36da | 88 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 89 | |
f5487145 LB |
90 | static int nocrt; |
91 | module_param(nocrt, int, 0); | |
8c99fdce | 92 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 93 | |
72b33ef8 LB |
94 | static int off; |
95 | module_param(off, int, 0); | |
3c1d36da | 96 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 97 | |
a70cdc52 LB |
98 | static int psv; |
99 | module_param(psv, int, 0644); | |
3c1d36da | 100 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 101 | |
4be44fcd LB |
102 | static int acpi_thermal_add(struct acpi_device *device); |
103 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 104 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
105 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
106 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
107 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 108 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
109 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
110 | const char __user *, size_t, | |
111 | loff_t *); | |
1da177e4 | 112 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
113 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
114 | size_t, loff_t *); | |
1da177e4 | 115 | |
1ba90e3a TR |
116 | static const struct acpi_device_id thermal_device_ids[] = { |
117 | {ACPI_THERMAL_HID, 0}, | |
118 | {"", 0}, | |
119 | }; | |
120 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
121 | ||
1da177e4 | 122 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 123 | .name = "thermal", |
4be44fcd | 124 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 125 | .ids = thermal_device_ids, |
4be44fcd LB |
126 | .ops = { |
127 | .add = acpi_thermal_add, | |
128 | .remove = acpi_thermal_remove, | |
74ce1468 | 129 | .resume = acpi_thermal_resume, |
4be44fcd | 130 | }, |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct acpi_thermal_state { | |
4be44fcd LB |
134 | u8 critical:1; |
135 | u8 hot:1; | |
136 | u8 passive:1; | |
137 | u8 active:1; | |
138 | u8 reserved:4; | |
139 | int active_index; | |
1da177e4 LT |
140 | }; |
141 | ||
142 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
143 | u8 valid:1; |
144 | u8 enabled:1; | |
145 | u8 reserved:6; | |
1da177e4 LT |
146 | }; |
147 | ||
148 | struct acpi_thermal_critical { | |
149 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 150 | unsigned long temperature; |
1da177e4 LT |
151 | }; |
152 | ||
153 | struct acpi_thermal_hot { | |
154 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 155 | unsigned long temperature; |
1da177e4 LT |
156 | }; |
157 | ||
158 | struct acpi_thermal_passive { | |
159 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
160 | unsigned long temperature; |
161 | unsigned long tc1; | |
162 | unsigned long tc2; | |
163 | unsigned long tsp; | |
164 | struct acpi_handle_list devices; | |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_thermal_active { | |
168 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
169 | unsigned long temperature; |
170 | struct acpi_handle_list devices; | |
1da177e4 LT |
171 | }; |
172 | ||
173 | struct acpi_thermal_trips { | |
174 | struct acpi_thermal_critical critical; | |
4be44fcd | 175 | struct acpi_thermal_hot hot; |
1da177e4 LT |
176 | struct acpi_thermal_passive passive; |
177 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
178 | }; | |
179 | ||
180 | struct acpi_thermal_flags { | |
4be44fcd LB |
181 | u8 cooling_mode:1; /* _SCP */ |
182 | u8 devices:1; /* _TZD */ | |
183 | u8 reserved:6; | |
1da177e4 LT |
184 | }; |
185 | ||
186 | struct acpi_thermal { | |
8348e1b1 | 187 | struct acpi_device * device; |
4be44fcd LB |
188 | acpi_bus_id name; |
189 | unsigned long temperature; | |
190 | unsigned long last_temperature; | |
191 | unsigned long polling_frequency; | |
4be44fcd | 192 | volatile u8 zombie; |
1da177e4 LT |
193 | struct acpi_thermal_flags flags; |
194 | struct acpi_thermal_state state; | |
195 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
196 | struct acpi_handle_list devices; |
197 | struct timer_list timer; | |
3f655ef8 ZR |
198 | struct thermal_zone_device *thermal_zone; |
199 | int tz_enabled; | |
6e215785 | 200 | struct mutex lock; |
1da177e4 LT |
201 | }; |
202 | ||
d7508032 | 203 | static const struct file_operations acpi_thermal_state_fops = { |
4be44fcd LB |
204 | .open = acpi_thermal_state_open_fs, |
205 | .read = seq_read, | |
206 | .llseek = seq_lseek, | |
207 | .release = single_release, | |
1da177e4 LT |
208 | }; |
209 | ||
d7508032 | 210 | static const struct file_operations acpi_thermal_temp_fops = { |
4be44fcd LB |
211 | .open = acpi_thermal_temp_open_fs, |
212 | .read = seq_read, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
1da177e4 LT |
215 | }; |
216 | ||
d7508032 | 217 | static const struct file_operations acpi_thermal_trip_fops = { |
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 = { |
4be44fcd LB |
225 | .open = acpi_thermal_cooling_open_fs, |
226 | .read = seq_read, | |
227 | .write = acpi_thermal_write_cooling_mode, | |
228 | .llseek = seq_lseek, | |
229 | .release = single_release, | |
1da177e4 LT |
230 | }; |
231 | ||
d7508032 | 232 | static const struct file_operations acpi_thermal_polling_fops = { |
4be44fcd LB |
233 | .open = acpi_thermal_polling_open_fs, |
234 | .read = seq_read, | |
235 | .write = acpi_thermal_write_polling, | |
236 | .llseek = seq_lseek, | |
237 | .release = single_release, | |
1da177e4 LT |
238 | }; |
239 | ||
240 | /* -------------------------------------------------------------------------- | |
241 | Thermal Zone Management | |
242 | -------------------------------------------------------------------------- */ | |
243 | ||
4be44fcd | 244 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 245 | { |
4be44fcd | 246 | acpi_status status = AE_OK; |
1da177e4 | 247 | |
1da177e4 LT |
248 | |
249 | if (!tz) | |
d550d98d | 250 | return -EINVAL; |
1da177e4 LT |
251 | |
252 | tz->last_temperature = tz->temperature; | |
253 | ||
4be44fcd | 254 | status = |
38ba7c9e | 255 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 256 | if (ACPI_FAILURE(status)) |
d550d98d | 257 | return -ENODEV; |
1da177e4 | 258 | |
4be44fcd LB |
259 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
260 | tz->temperature)); | |
1da177e4 | 261 | |
d550d98d | 262 | return 0; |
1da177e4 LT |
263 | } |
264 | ||
4be44fcd | 265 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 266 | { |
4be44fcd | 267 | acpi_status status = AE_OK; |
1da177e4 | 268 | |
1da177e4 LT |
269 | |
270 | if (!tz) | |
d550d98d | 271 | return -EINVAL; |
1da177e4 | 272 | |
4be44fcd | 273 | status = |
38ba7c9e | 274 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 275 | &tz->polling_frequency); |
1da177e4 | 276 | if (ACPI_FAILURE(status)) |
d550d98d | 277 | return -ENODEV; |
1da177e4 | 278 | |
4be44fcd LB |
279 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
280 | tz->polling_frequency)); | |
1da177e4 | 281 | |
d550d98d | 282 | return 0; |
1da177e4 LT |
283 | } |
284 | ||
4be44fcd | 285 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 286 | { |
1da177e4 LT |
287 | |
288 | if (!tz) | |
d550d98d | 289 | return -EINVAL; |
1da177e4 LT |
290 | |
291 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
292 | ||
4be44fcd LB |
293 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
294 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 295 | tz->polling_frequency/10)); |
1da177e4 | 296 | |
d550d98d | 297 | return 0; |
1da177e4 LT |
298 | } |
299 | ||
4be44fcd | 300 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 301 | { |
4be44fcd LB |
302 | acpi_status status = AE_OK; |
303 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
304 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
305 | acpi_handle handle = NULL; | |
1da177e4 | 306 | |
1da177e4 LT |
307 | |
308 | if (!tz) | |
d550d98d | 309 | return -EINVAL; |
1da177e4 | 310 | |
38ba7c9e | 311 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
312 | if (ACPI_FAILURE(status)) { |
313 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 314 | return -ENODEV; |
1da177e4 LT |
315 | } |
316 | ||
317 | arg0.integer.value = mode; | |
318 | ||
319 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
320 | if (ACPI_FAILURE(status)) | |
d550d98d | 321 | return -ENODEV; |
1da177e4 | 322 | |
d550d98d | 323 | return 0; |
1da177e4 LT |
324 | } |
325 | ||
ce44e197 ZR |
326 | #define ACPI_TRIPS_CRITICAL 0x01 |
327 | #define ACPI_TRIPS_HOT 0x02 | |
328 | #define ACPI_TRIPS_PASSIVE 0x04 | |
329 | #define ACPI_TRIPS_ACTIVE 0x08 | |
330 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 331 | |
ce44e197 ZR |
332 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
333 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 334 | |
ce44e197 ZR |
335 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
336 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
337 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 338 | |
ce44e197 ZR |
339 | /* |
340 | * This exception is thrown out in two cases: | |
341 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
342 | * when re-evaluating the AML code. | |
343 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
344 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
345 | */ | |
346 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
347 | do { \ | |
348 | if (flags != ACPI_TRIPS_INIT) \ | |
349 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
350 | "ACPI thermal trip point %s changed\n" \ | |
351 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
352 | } while (0) | |
353 | ||
354 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
355 | { | |
356 | acpi_status status = AE_OK; | |
357 | struct acpi_handle_list devices; | |
358 | int valid = 0; | |
359 | int i; | |
1da177e4 | 360 | |
ce44e197 ZR |
361 | /* Critical Shutdown (required) */ |
362 | if (flag & ACPI_TRIPS_CRITICAL) { | |
363 | status = acpi_evaluate_integer(tz->device->handle, | |
364 | "_CRT", NULL, &tz->trips.critical.temperature); | |
365 | if (ACPI_FAILURE(status)) { | |
c52a7419 | 366 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
367 | ACPI_EXCEPTION((AE_INFO, status, |
368 | "No critical threshold")); | |
369 | return -ENODEV; | |
370 | } else { | |
371 | tz->trips.critical.flags.valid = 1; | |
372 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
373 | "Found critical threshold [%lu]\n", | |
374 | tz->trips.critical.temperature)); | |
375 | } | |
376 | if (tz->trips.critical.flags.valid == 1) { | |
377 | if (crt == -1) { | |
378 | tz->trips.critical.flags.valid = 0; | |
379 | } else if (crt > 0) { | |
380 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
381 | /* | |
382 | * Allow override to lower critical threshold | |
383 | */ | |
384 | if (crt_k < tz->trips.critical.temperature) | |
385 | tz->trips.critical.temperature = crt_k; | |
386 | } | |
c52a7419 LB |
387 | } |
388 | } | |
389 | ||
1da177e4 | 390 | /* Critical Sleep (optional) */ |
ce44e197 | 391 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 392 | status = acpi_evaluate_integer(tz->device->handle, |
ce44e197 ZR |
393 | "_HOT", NULL, &tz->trips.hot.temperature); |
394 | if (ACPI_FAILURE(status)) { | |
395 | tz->trips.hot.flags.valid = 0; | |
396 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
397 | "No hot threshold\n")); | |
398 | } else { | |
399 | tz->trips.hot.flags.valid = 1; | |
400 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
401 | "Found hot threshold [%lu]\n", | |
402 | tz->trips.critical.temperature)); | |
403 | } | |
a70cdc52 LB |
404 | } |
405 | ||
ce44e197 ZR |
406 | /* Passive (optional) */ |
407 | if (flag & ACPI_TRIPS_PASSIVE) { | |
408 | valid = tz->trips.passive.flags.valid; | |
409 | if (psv == -1) { | |
410 | status = AE_SUPPORT; | |
411 | } else if (psv > 0) { | |
412 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
413 | status = AE_OK; | |
414 | } else { | |
415 | status = acpi_evaluate_integer(tz->device->handle, | |
416 | "_PSV", NULL, &tz->trips.passive.temperature); | |
417 | } | |
1da177e4 | 418 | |
1da177e4 LT |
419 | if (ACPI_FAILURE(status)) |
420 | tz->trips.passive.flags.valid = 0; | |
ce44e197 ZR |
421 | else { |
422 | tz->trips.passive.flags.valid = 1; | |
423 | if (flag == ACPI_TRIPS_INIT) { | |
424 | status = acpi_evaluate_integer( | |
425 | tz->device->handle, "_TC1", | |
426 | NULL, &tz->trips.passive.tc1); | |
427 | if (ACPI_FAILURE(status)) | |
428 | tz->trips.passive.flags.valid = 0; | |
429 | status = acpi_evaluate_integer( | |
430 | tz->device->handle, "_TC2", | |
431 | NULL, &tz->trips.passive.tc2); | |
432 | if (ACPI_FAILURE(status)) | |
433 | tz->trips.passive.flags.valid = 0; | |
434 | status = acpi_evaluate_integer( | |
435 | tz->device->handle, "_TSP", | |
436 | NULL, &tz->trips.passive.tsp); | |
437 | if (ACPI_FAILURE(status)) | |
438 | tz->trips.passive.flags.valid = 0; | |
439 | } | |
440 | } | |
441 | } | |
442 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
443 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
444 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
445 | NULL, &devices); | |
1da177e4 LT |
446 | if (ACPI_FAILURE(status)) |
447 | tz->trips.passive.flags.valid = 0; | |
1da177e4 | 448 | else |
ce44e197 | 449 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 450 | |
ce44e197 ZR |
451 | if (memcmp(&tz->trips.passive.devices, &devices, |
452 | sizeof(struct acpi_handle_list))) { | |
453 | memcpy(&tz->trips.passive.devices, &devices, | |
454 | sizeof(struct acpi_handle_list)); | |
455 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
456 | } | |
457 | } | |
458 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
459 | if (valid != tz->trips.passive.flags.valid) | |
460 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
461 | } | |
1da177e4 | 462 | |
ce44e197 | 463 | /* Active (optional) */ |
4be44fcd | 464 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 465 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 466 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 467 | |
f8707ec9 | 468 | if (act == -1) |
ce44e197 ZR |
469 | break; /* disable all active trip points */ |
470 | ||
471 | if (flag & ACPI_TRIPS_ACTIVE) { | |
472 | status = acpi_evaluate_integer(tz->device->handle, | |
473 | name, NULL, &tz->trips.active[i].temperature); | |
474 | if (ACPI_FAILURE(status)) { | |
475 | tz->trips.active[i].flags.valid = 0; | |
476 | if (i == 0) | |
477 | break; | |
478 | if (act <= 0) | |
479 | break; | |
480 | if (i == 1) | |
481 | tz->trips.active[0].temperature = | |
482 | CELSIUS_TO_KELVIN(act); | |
483 | else | |
484 | /* | |
485 | * Don't allow override higher than | |
486 | * the next higher trip point | |
487 | */ | |
488 | tz->trips.active[i - 1].temperature = | |
489 | (tz->trips.active[i - 2].temperature < | |
490 | CELSIUS_TO_KELVIN(act) ? | |
491 | tz->trips.active[i - 2].temperature : | |
492 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 493 | break; |
ce44e197 ZR |
494 | } else |
495 | tz->trips.active[i].flags.valid = 1; | |
f8707ec9 | 496 | } |
1da177e4 LT |
497 | |
498 | name[2] = 'L'; | |
ce44e197 ZR |
499 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
500 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
501 | status = acpi_evaluate_reference(tz->device->handle, | |
502 | name, NULL, &devices); | |
503 | if (ACPI_FAILURE(status)) | |
504 | tz->trips.active[i].flags.valid = 0; | |
505 | else | |
506 | tz->trips.active[i].flags.valid = 1; | |
507 | ||
508 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
509 | sizeof(struct acpi_handle_list))) { | |
510 | memcpy(&tz->trips.active[i].devices, &devices, | |
511 | sizeof(struct acpi_handle_list)); | |
512 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
513 | } | |
514 | } | |
515 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
516 | if (valid != tz->trips.active[i].flags.valid) | |
517 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
518 | ||
519 | if (!tz->trips.active[i].flags.valid) | |
520 | break; | |
521 | } | |
522 | ||
523 | if (flag & ACPI_TRIPS_DEVICES) { | |
524 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
525 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
526 | NULL, &devices); | |
527 | if (memcmp(&tz->devices, &devices, | |
528 | sizeof(struct acpi_handle_list))) { | |
529 | memcpy(&tz->devices, &devices, | |
530 | sizeof(struct acpi_handle_list)); | |
531 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
532 | } | |
1da177e4 LT |
533 | } |
534 | ||
d550d98d | 535 | return 0; |
1da177e4 LT |
536 | } |
537 | ||
ce44e197 | 538 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 539 | { |
ce44e197 | 540 | return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
1da177e4 LT |
541 | } |
542 | ||
4be44fcd | 543 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 544 | { |
f5487145 | 545 | if (!tz || !tz->trips.critical.flags.valid || nocrt) |
d550d98d | 546 | return -EINVAL; |
1da177e4 LT |
547 | |
548 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 549 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 550 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 551 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
552 | tz->trips.critical.flags.enabled = 0; |
553 | ||
4be44fcd LB |
554 | printk(KERN_EMERG |
555 | "Critical temperature reached (%ld C), shutting down.\n", | |
556 | KELVIN_TO_CELSIUS(tz->temperature)); | |
14e04fb3 | 557 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 558 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
559 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
560 | tz->device->dev.bus_id, | |
561 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
562 | tz->trips.critical.flags.enabled); | |
1da177e4 | 563 | |
10a0a8d4 | 564 | orderly_poweroff(true); |
1da177e4 | 565 | |
d550d98d | 566 | return 0; |
1da177e4 LT |
567 | } |
568 | ||
4be44fcd | 569 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 570 | { |
f5487145 | 571 | if (!tz || !tz->trips.hot.flags.valid || nocrt) |
d550d98d | 572 | return -EINVAL; |
1da177e4 LT |
573 | |
574 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 575 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 576 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 577 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
578 | tz->trips.hot.flags.enabled = 0; |
579 | ||
14e04fb3 | 580 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 581 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
582 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
583 | tz->device->dev.bus_id, | |
584 | ACPI_THERMAL_NOTIFY_HOT, | |
585 | tz->trips.hot.flags.enabled); | |
1da177e4 LT |
586 | |
587 | /* TBD: Call user-mode "sleep(S4)" function */ | |
588 | ||
d550d98d | 589 | return 0; |
1da177e4 LT |
590 | } |
591 | ||
1cbf4c56 | 592 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 593 | { |
1cbf4c56 | 594 | int result = 1; |
1da177e4 | 595 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
596 | int trend = 0; |
597 | int i = 0; | |
1da177e4 | 598 | |
1da177e4 LT |
599 | |
600 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 601 | return; |
1da177e4 LT |
602 | |
603 | passive = &(tz->trips.passive); | |
604 | ||
605 | /* | |
606 | * Above Trip? | |
607 | * ----------- | |
608 | * Calculate the thermal trend (using the passive cooling equation) | |
609 | * and modify the performance limit for all passive cooling devices | |
610 | * accordingly. Note that we assume symmetry. | |
611 | */ | |
612 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
613 | trend = |
614 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
615 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
616 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
617 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
618 | trend, passive->tc1, tz->temperature, | |
619 | tz->last_temperature, passive->tc2, | |
620 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 621 | passive->flags.enabled = 1; |
1da177e4 LT |
622 | /* Heating up? */ |
623 | if (trend > 0) | |
4be44fcd LB |
624 | for (i = 0; i < passive->devices.count; i++) |
625 | acpi_processor_set_thermal_limit(passive-> | |
626 | devices. | |
627 | handles[i], | |
628 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 629 | /* Cooling off? */ |
1cbf4c56 | 630 | else if (trend < 0) { |
4be44fcd | 631 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
632 | /* |
633 | * assume that we are on highest | |
634 | * freq/lowest thrott and can leave | |
635 | * passive mode, even in error case | |
636 | */ | |
637 | if (!acpi_processor_set_thermal_limit | |
638 | (passive->devices.handles[i], | |
639 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
640 | result = 0; | |
641 | /* | |
642 | * Leave cooling mode, even if the temp might | |
643 | * higher than trip point This is because some | |
644 | * machines might have long thermal polling | |
645 | * frequencies (tsp) defined. We will fall back | |
646 | * into passive mode in next cycle (probably quicker) | |
647 | */ | |
648 | if (result) { | |
649 | passive->flags.enabled = 0; | |
650 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
651 | "Disabling passive cooling, still above threshold," | |
652 | " but we are cooling down\n")); | |
653 | } | |
654 | } | |
655 | return; | |
1da177e4 LT |
656 | } |
657 | ||
658 | /* | |
659 | * Below Trip? | |
660 | * ----------- | |
661 | * Implement passive cooling hysteresis to slowly increase performance | |
662 | * and avoid thrashing around the passive trip point. Note that we | |
663 | * assume symmetry. | |
664 | */ | |
1cbf4c56 TR |
665 | if (!passive->flags.enabled) |
666 | return; | |
667 | for (i = 0; i < passive->devices.count; i++) | |
668 | if (!acpi_processor_set_thermal_limit | |
669 | (passive->devices.handles[i], | |
670 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
671 | result = 0; | |
672 | if (result) { | |
673 | passive->flags.enabled = 0; | |
674 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
675 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 676 | } |
1da177e4 LT |
677 | } |
678 | ||
1cbf4c56 | 679 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 680 | { |
4be44fcd | 681 | int result = 0; |
1da177e4 | 682 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
683 | int i = 0; |
684 | int j = 0; | |
685 | unsigned long maxtemp = 0; | |
1da177e4 | 686 | |
1da177e4 LT |
687 | |
688 | if (!tz) | |
1cbf4c56 | 689 | return; |
1da177e4 | 690 | |
4be44fcd | 691 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
692 | active = &(tz->trips.active[i]); |
693 | if (!active || !active->flags.valid) | |
694 | break; | |
1da177e4 | 695 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
696 | /* |
697 | * Above Threshold? | |
698 | * ---------------- | |
699 | * If not already enabled, turn ON all cooling devices | |
700 | * associated with this active threshold. | |
701 | */ | |
1da177e4 | 702 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
703 | tz->state.active_index = i; |
704 | maxtemp = active->temperature; | |
705 | if (active->flags.enabled) | |
706 | continue; | |
1da177e4 | 707 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
708 | result = |
709 | acpi_bus_set_power(active->devices. | |
710 | handles[j], | |
1cbf4c56 | 711 | ACPI_STATE_D0); |
1da177e4 | 712 | if (result) { |
cece9296 LB |
713 | printk(KERN_WARNING PREFIX |
714 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 715 | active->devices. |
cece9296 | 716 | handles[j]); |
1da177e4 LT |
717 | continue; |
718 | } | |
1cbf4c56 | 719 | active->flags.enabled = 1; |
4be44fcd | 720 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 721 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 722 | active->devices.handles[j])); |
1da177e4 | 723 | } |
1cbf4c56 TR |
724 | continue; |
725 | } | |
726 | if (!active->flags.enabled) | |
727 | continue; | |
728 | /* | |
729 | * Below Threshold? | |
730 | * ---------------- | |
731 | * Turn OFF all cooling devices associated with this | |
732 | * threshold. | |
733 | */ | |
734 | for (j = 0; j < active->devices.count; j++) { | |
735 | result = acpi_bus_set_power(active->devices.handles[j], | |
736 | ACPI_STATE_D3); | |
737 | if (result) { | |
cece9296 LB |
738 | printk(KERN_WARNING PREFIX |
739 | "Unable to turn cooling device [%p] 'off'\n", | |
740 | active->devices.handles[j]); | |
1cbf4c56 TR |
741 | continue; |
742 | } | |
743 | active->flags.enabled = 0; | |
744 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
745 | "Cooling device [%p] now 'off'\n", | |
746 | active->devices.handles[j])); | |
1da177e4 LT |
747 | } |
748 | } | |
1da177e4 LT |
749 | } |
750 | ||
4be44fcd | 751 | static void acpi_thermal_check(void *context); |
1da177e4 | 752 | |
4be44fcd | 753 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
754 | { |
755 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
756 | if (!tz->zombie) | |
b8d35192 | 757 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
758 | } |
759 | ||
4be44fcd | 760 | static void acpi_thermal_check(void *data) |
1da177e4 | 761 | { |
4be44fcd | 762 | int result = 0; |
50dd0969 | 763 | struct acpi_thermal *tz = data; |
4be44fcd | 764 | unsigned long sleep_time = 0; |
21bc42ab | 765 | unsigned long timeout_jiffies = 0; |
4be44fcd | 766 | int i = 0; |
1da177e4 LT |
767 | struct acpi_thermal_state state; |
768 | ||
1da177e4 LT |
769 | |
770 | if (!tz) { | |
6468463a | 771 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 772 | return; |
1da177e4 LT |
773 | } |
774 | ||
6e215785 AS |
775 | /* Check if someone else is already running */ |
776 | if (!mutex_trylock(&tz->lock)) | |
777 | return; | |
778 | ||
1da177e4 LT |
779 | state = tz->state; |
780 | ||
781 | result = acpi_thermal_get_temperature(tz); | |
782 | if (result) | |
6e215785 | 783 | goto unlock; |
4be44fcd | 784 | |
3f655ef8 ZR |
785 | if (!tz->tz_enabled) |
786 | goto unlock; | |
787 | ||
1da177e4 | 788 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 789 | |
1da177e4 LT |
790 | /* |
791 | * Check Trip Points | |
792 | * ----------------- | |
793 | * Compare the current temperature to the trip point values to see | |
794 | * if we've entered one of the thermal policy states. Note that | |
795 | * this function determines when a state is entered, but the | |
796 | * individual policy decides when it is exited (e.g. hysteresis). | |
797 | */ | |
798 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
799 | state.critical |= |
800 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
801 | if (tz->trips.hot.flags.valid) |
802 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
803 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
804 | state.passive |= |
805 | (tz->temperature >= tz->trips.passive.temperature); | |
806 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 807 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
808 | state.active |= |
809 | (tz->temperature >= | |
810 | tz->trips.active[i].temperature); | |
1da177e4 LT |
811 | |
812 | /* | |
813 | * Invoke Policy | |
814 | * ------------- | |
815 | * Separated from the above check to allow individual policy to | |
816 | * determine when to exit a given state. | |
817 | */ | |
818 | if (state.critical) | |
819 | acpi_thermal_critical(tz); | |
820 | if (state.hot) | |
821 | acpi_thermal_hot(tz); | |
822 | if (state.passive) | |
823 | acpi_thermal_passive(tz); | |
824 | if (state.active) | |
825 | acpi_thermal_active(tz); | |
826 | ||
827 | /* | |
828 | * Calculate State | |
829 | * --------------- | |
830 | * Again, separated from the above two to allow independent policy | |
831 | * decisions. | |
832 | */ | |
1cbf4c56 TR |
833 | tz->state.critical = tz->trips.critical.flags.enabled; |
834 | tz->state.hot = tz->trips.hot.flags.enabled; | |
835 | tz->state.passive = tz->trips.passive.flags.enabled; | |
836 | tz->state.active = 0; | |
4be44fcd | 837 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 838 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
839 | |
840 | /* | |
841 | * Calculate Sleep Time | |
842 | * -------------------- | |
843 | * If we're in the passive state, use _TSP's value. Otherwise | |
844 | * use the default polling frequency (e.g. _TZP). If no polling | |
845 | * frequency is specified then we'll wait forever (at least until | |
846 | * a thermal event occurs). Note that _TSP and _TZD values are | |
847 | * given in 1/10th seconds (we must covert to milliseconds). | |
848 | */ | |
21bc42ab | 849 | if (tz->state.passive) { |
1da177e4 | 850 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
851 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
852 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 853 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
854 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
855 | } | |
1da177e4 | 856 | |
4be44fcd LB |
857 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
858 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
859 | |
860 | /* | |
861 | * Schedule Next Poll | |
862 | * ------------------ | |
863 | */ | |
864 | if (!sleep_time) { | |
865 | if (timer_pending(&(tz->timer))) | |
866 | del_timer(&(tz->timer)); | |
4be44fcd | 867 | } else { |
1da177e4 | 868 | if (timer_pending(&(tz->timer))) |
21bc42ab | 869 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 870 | else { |
4be44fcd | 871 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 872 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 873 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
874 | add_timer(&(tz->timer)); |
875 | } | |
876 | } | |
6e215785 AS |
877 | unlock: |
878 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
879 | } |
880 | ||
3f655ef8 ZR |
881 | /* sys I/F for generic thermal sysfs support */ |
882 | static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf) | |
883 | { | |
884 | struct acpi_thermal *tz = thermal->devdata; | |
885 | ||
886 | if (!tz) | |
887 | return -EINVAL; | |
888 | ||
889 | return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(tz->temperature)); | |
890 | } | |
891 | ||
892 | static const char enabled[] = "kernel"; | |
893 | static const char disabled[] = "user"; | |
894 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
895 | char *buf) | |
896 | { | |
897 | struct acpi_thermal *tz = thermal->devdata; | |
898 | ||
899 | if (!tz) | |
900 | return -EINVAL; | |
901 | ||
902 | return sprintf(buf, "%s\n", tz->tz_enabled ? | |
903 | enabled : disabled); | |
904 | } | |
905 | ||
906 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
907 | const char *buf) | |
908 | { | |
909 | struct acpi_thermal *tz = thermal->devdata; | |
910 | int enable; | |
911 | ||
912 | if (!tz) | |
913 | return -EINVAL; | |
914 | ||
915 | /* | |
916 | * enable/disable thermal management from ACPI thermal driver | |
917 | */ | |
918 | if (!strncmp(buf, enabled, sizeof enabled - 1)) | |
919 | enable = 1; | |
920 | else if (!strncmp(buf, disabled, sizeof disabled - 1)) | |
921 | enable = 0; | |
922 | else | |
923 | return -EINVAL; | |
924 | ||
925 | if (enable != tz->tz_enabled) { | |
926 | tz->tz_enabled = enable; | |
927 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
928 | "%s ACPI thermal control\n", | |
929 | tz->tz_enabled ? enabled : disabled)); | |
930 | acpi_thermal_check(tz); | |
931 | } | |
932 | return 0; | |
933 | } | |
934 | ||
935 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
936 | int trip, char *buf) | |
937 | { | |
938 | struct acpi_thermal *tz = thermal->devdata; | |
939 | int i; | |
940 | ||
941 | if (!tz || trip < 0) | |
942 | return -EINVAL; | |
943 | ||
944 | if (tz->trips.critical.flags.valid) { | |
945 | if (!trip) | |
946 | return sprintf(buf, "critical\n"); | |
947 | trip--; | |
948 | } | |
949 | ||
950 | if (tz->trips.hot.flags.valid) { | |
951 | if (!trip) | |
952 | return sprintf(buf, "hot\n"); | |
953 | trip--; | |
954 | } | |
955 | ||
956 | if (tz->trips.passive.flags.valid) { | |
957 | if (!trip) | |
958 | return sprintf(buf, "passive\n"); | |
959 | trip--; | |
960 | } | |
961 | ||
962 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
963 | tz->trips.active[i].flags.valid; i++) { | |
964 | if (!trip) | |
965 | return sprintf(buf, "active%d\n", i); | |
966 | trip--; | |
967 | } | |
968 | ||
969 | return -EINVAL; | |
970 | } | |
971 | ||
972 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
973 | int trip, char *buf) | |
974 | { | |
975 | struct acpi_thermal *tz = thermal->devdata; | |
976 | int i; | |
977 | ||
978 | if (!tz || trip < 0) | |
979 | return -EINVAL; | |
980 | ||
981 | if (tz->trips.critical.flags.valid) { | |
982 | if (!trip) | |
983 | return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS( | |
984 | tz->trips.critical.temperature)); | |
985 | trip--; | |
986 | } | |
987 | ||
988 | if (tz->trips.hot.flags.valid) { | |
989 | if (!trip) | |
990 | return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS( | |
991 | tz->trips.hot.temperature)); | |
992 | trip--; | |
993 | } | |
994 | ||
995 | if (tz->trips.passive.flags.valid) { | |
996 | if (!trip) | |
997 | return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS( | |
998 | tz->trips.passive.temperature)); | |
999 | trip--; | |
1000 | } | |
1001 | ||
1002 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1003 | tz->trips.active[i].flags.valid; i++) { | |
1004 | if (!trip) | |
1005 | return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS( | |
1006 | tz->trips.active[i].temperature)); | |
1007 | trip--; | |
1008 | } | |
1009 | ||
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
1013 | typedef int (*cb)(struct thermal_zone_device *, int, | |
1014 | struct thermal_cooling_device *); | |
1015 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
1016 | struct thermal_cooling_device *cdev, | |
1017 | cb action) | |
1018 | { | |
1019 | struct acpi_device *device = cdev->devdata; | |
1020 | struct acpi_thermal *tz = thermal->devdata; | |
1021 | acpi_handle handle = device->handle; | |
1022 | int i; | |
1023 | int j; | |
1024 | int trip = -1; | |
1025 | int result = 0; | |
1026 | ||
1027 | if (tz->trips.critical.flags.valid) | |
1028 | trip++; | |
1029 | ||
1030 | if (tz->trips.hot.flags.valid) | |
1031 | trip++; | |
1032 | ||
1033 | if (tz->trips.passive.flags.valid) { | |
1034 | trip++; | |
1035 | for (i = 0; i < tz->trips.passive.devices.count; | |
1036 | i++) { | |
1037 | if (tz->trips.passive.devices.handles[i] != | |
1038 | handle) | |
1039 | continue; | |
1040 | result = action(thermal, trip, cdev); | |
1041 | if (result) | |
1042 | goto failed; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1047 | if (!tz->trips.active[i].flags.valid) | |
1048 | break; | |
1049 | trip++; | |
1050 | for (j = 0; | |
1051 | j < tz->trips.active[i].devices.count; | |
1052 | j++) { | |
1053 | if (tz->trips.active[i].devices. | |
1054 | handles[j] != handle) | |
1055 | continue; | |
1056 | result = action(thermal, trip, cdev); | |
1057 | if (result) | |
1058 | goto failed; | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | for (i = 0; i < tz->devices.count; i++) { | |
1063 | if (tz->devices.handles[i] != handle) | |
1064 | continue; | |
1065 | result = action(thermal, -1, cdev); | |
1066 | if (result) | |
1067 | goto failed; | |
1068 | } | |
1069 | ||
1070 | failed: | |
1071 | return result; | |
1072 | } | |
1073 | ||
1074 | static int | |
1075 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
1076 | struct thermal_cooling_device *cdev) | |
1077 | { | |
1078 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1079 | thermal_zone_bind_cooling_device); | |
1080 | } | |
1081 | ||
1082 | static int | |
1083 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
1084 | struct thermal_cooling_device *cdev) | |
1085 | { | |
1086 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
1087 | thermal_zone_unbind_cooling_device); | |
1088 | } | |
1089 | ||
1090 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
1091 | .bind = acpi_thermal_bind_cooling_device, | |
1092 | .unbind = acpi_thermal_unbind_cooling_device, | |
1093 | .get_temp = thermal_get_temp, | |
1094 | .get_mode = thermal_get_mode, | |
1095 | .set_mode = thermal_set_mode, | |
1096 | .get_trip_type = thermal_get_trip_type, | |
1097 | .get_trip_temp = thermal_get_trip_temp, | |
1098 | }; | |
1099 | ||
1100 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
1101 | { | |
1102 | int trips = 0; | |
1103 | int result; | |
1104 | int i; | |
1105 | ||
1106 | if (tz->trips.critical.flags.valid) | |
1107 | trips++; | |
1108 | ||
1109 | if (tz->trips.hot.flags.valid) | |
1110 | trips++; | |
1111 | ||
1112 | if (tz->trips.passive.flags.valid) | |
1113 | trips++; | |
1114 | ||
1115 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
1116 | tz->trips.active[i].flags.valid; i++, trips++); | |
1117 | tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone", | |
1118 | trips, tz, &acpi_thermal_zone_ops); | |
1119 | if (!tz->thermal_zone) | |
1120 | return -ENODEV; | |
1121 | ||
1122 | result = sysfs_create_link(&tz->device->dev.kobj, | |
1123 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
1124 | if (result) | |
1125 | return result; | |
1126 | ||
1127 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
1128 | &tz->device->dev.kobj, "device"); | |
1129 | if (result) | |
1130 | return result; | |
1131 | ||
1132 | tz->tz_enabled = 1; | |
1133 | ||
1134 | printk(KERN_INFO PREFIX "%s is registered as thermal_zone%d\n", | |
1135 | tz->device->dev.bus_id, tz->thermal_zone->id); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
1140 | { | |
1141 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
1142 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
1143 | thermal_zone_device_unregister(tz->thermal_zone); | |
1144 | tz->thermal_zone = NULL; | |
1145 | } | |
1146 | ||
1147 | ||
1da177e4 LT |
1148 | /* -------------------------------------------------------------------------- |
1149 | FS Interface (/proc) | |
1150 | -------------------------------------------------------------------------- */ | |
1151 | ||
4be44fcd | 1152 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
1153 | |
1154 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
1155 | { | |
50dd0969 | 1156 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1157 | |
1da177e4 LT |
1158 | |
1159 | if (!tz) | |
1160 | goto end; | |
1161 | ||
1162 | seq_puts(seq, "state: "); | |
1163 | ||
4be44fcd LB |
1164 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
1165 | && !tz->state.active) | |
1da177e4 LT |
1166 | seq_puts(seq, "ok\n"); |
1167 | else { | |
1168 | if (tz->state.critical) | |
1169 | seq_puts(seq, "critical "); | |
1170 | if (tz->state.hot) | |
1171 | seq_puts(seq, "hot "); | |
1172 | if (tz->state.passive) | |
1173 | seq_puts(seq, "passive "); | |
1174 | if (tz->state.active) | |
1175 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1176 | seq_puts(seq, "\n"); | |
1177 | } | |
1178 | ||
4be44fcd | 1179 | end: |
d550d98d | 1180 | return 0; |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1184 | { | |
1185 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1186 | } | |
1187 | ||
1da177e4 LT |
1188 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1189 | { | |
4be44fcd | 1190 | int result = 0; |
50dd0969 | 1191 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1192 | |
1da177e4 LT |
1193 | |
1194 | if (!tz) | |
1195 | goto end; | |
1196 | ||
1197 | result = acpi_thermal_get_temperature(tz); | |
1198 | if (result) | |
1199 | goto end; | |
1200 | ||
4be44fcd LB |
1201 | seq_printf(seq, "temperature: %ld C\n", |
1202 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1203 | |
4be44fcd | 1204 | end: |
d550d98d | 1205 | return 0; |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1209 | { | |
1210 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1211 | } | |
1212 | ||
1da177e4 LT |
1213 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1214 | { | |
50dd0969 | 1215 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1216 | struct acpi_device *device; |
e7c746ef TR |
1217 | acpi_status status; |
1218 | ||
4be44fcd LB |
1219 | int i = 0; |
1220 | int j = 0; | |
1da177e4 | 1221 | |
1da177e4 LT |
1222 | |
1223 | if (!tz) | |
1224 | goto end; | |
1225 | ||
1226 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1227 | seq_printf(seq, "critical (S5): %ld C%s", |
1228 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1229 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1230 | |
1231 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1232 | seq_printf(seq, "hot (S4): %ld C%s", |
1233 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1234 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1235 | |
1236 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1237 | seq_printf(seq, |
1238 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1239 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1240 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1241 | tz->trips.passive.tsp); | |
1242 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1243 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1244 | handles[j], &device); | |
1245 | seq_printf(seq, "%4.4s ", status ? "" : | |
1246 | acpi_device_bid(device)); | |
1da177e4 LT |
1247 | } |
1248 | seq_puts(seq, "\n"); | |
1249 | } | |
1250 | ||
1251 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1252 | if (!(tz->trips.active[i].flags.valid)) | |
1253 | break; | |
1254 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1255 | i, |
1256 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1257 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1258 | status = acpi_bus_get_device(tz->trips.active[i]. |
1259 | devices.handles[j], | |
1260 | &device); | |
1261 | seq_printf(seq, "%4.4s ", status ? "" : | |
1262 | acpi_device_bid(device)); | |
68ccfaa8 | 1263 | } |
1da177e4 LT |
1264 | seq_puts(seq, "\n"); |
1265 | } | |
1266 | ||
4be44fcd | 1267 | end: |
d550d98d | 1268 | return 0; |
1da177e4 LT |
1269 | } |
1270 | ||
1271 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1272 | { | |
1273 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1274 | } | |
1275 | ||
1da177e4 LT |
1276 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1277 | { | |
50dd0969 | 1278 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1279 | |
1da177e4 LT |
1280 | |
1281 | if (!tz) | |
1282 | goto end; | |
1283 | ||
eaca2d3f | 1284 | if (!tz->flags.cooling_mode) |
1da177e4 | 1285 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1286 | else |
eaca2d3f | 1287 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1288 | |
4be44fcd | 1289 | end: |
d550d98d | 1290 | return 0; |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1294 | { | |
1295 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1296 | PDE(inode)->data); |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | static ssize_t | |
4be44fcd LB |
1300 | acpi_thermal_write_cooling_mode(struct file *file, |
1301 | const char __user * buffer, | |
1302 | size_t count, loff_t * ppos) | |
1da177e4 | 1303 | { |
50dd0969 JE |
1304 | struct seq_file *m = file->private_data; |
1305 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1306 | int result = 0; |
1307 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1308 | |
1da177e4 LT |
1309 | |
1310 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1311 | return -EINVAL; |
1da177e4 LT |
1312 | |
1313 | if (!tz->flags.cooling_mode) | |
d550d98d | 1314 | return -ENODEV; |
1da177e4 LT |
1315 | |
1316 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1317 | return -EFAULT; |
4be44fcd | 1318 | |
1da177e4 | 1319 | mode_string[count] = '\0'; |
4be44fcd LB |
1320 | |
1321 | result = acpi_thermal_set_cooling_mode(tz, | |
1322 | simple_strtoul(mode_string, NULL, | |
1323 | 0)); | |
1da177e4 | 1324 | if (result) |
d550d98d | 1325 | return result; |
1da177e4 LT |
1326 | |
1327 | acpi_thermal_check(tz); | |
1328 | ||
d550d98d | 1329 | return count; |
1da177e4 LT |
1330 | } |
1331 | ||
1da177e4 LT |
1332 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1333 | { | |
50dd0969 | 1334 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1335 | |
1da177e4 LT |
1336 | |
1337 | if (!tz) | |
1338 | goto end; | |
1339 | ||
1340 | if (!tz->polling_frequency) { | |
1341 | seq_puts(seq, "<polling disabled>\n"); | |
1342 | goto end; | |
1343 | } | |
1344 | ||
1345 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1346 | (tz->polling_frequency / 10)); |
1da177e4 | 1347 | |
4be44fcd | 1348 | end: |
d550d98d | 1349 | return 0; |
1da177e4 LT |
1350 | } |
1351 | ||
1352 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1353 | { | |
1354 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1355 | PDE(inode)->data); |
1da177e4 LT |
1356 | } |
1357 | ||
1358 | static ssize_t | |
4be44fcd LB |
1359 | acpi_thermal_write_polling(struct file *file, |
1360 | const char __user * buffer, | |
1361 | size_t count, loff_t * ppos) | |
1da177e4 | 1362 | { |
50dd0969 JE |
1363 | struct seq_file *m = file->private_data; |
1364 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1365 | int result = 0; |
1366 | char polling_string[12] = { '\0' }; | |
1367 | int seconds = 0; | |
1da177e4 | 1368 | |
1da177e4 LT |
1369 | |
1370 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1371 | return -EINVAL; |
4be44fcd | 1372 | |
1da177e4 | 1373 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1374 | return -EFAULT; |
4be44fcd | 1375 | |
1da177e4 LT |
1376 | polling_string[count] = '\0'; |
1377 | ||
1378 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1379 | |
1da177e4 LT |
1380 | result = acpi_thermal_set_polling(tz, seconds); |
1381 | if (result) | |
d550d98d | 1382 | return result; |
1da177e4 LT |
1383 | |
1384 | acpi_thermal_check(tz); | |
1385 | ||
d550d98d | 1386 | return count; |
1da177e4 LT |
1387 | } |
1388 | ||
4be44fcd | 1389 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1390 | { |
4be44fcd | 1391 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1392 | |
1da177e4 LT |
1393 | |
1394 | if (!acpi_device_dir(device)) { | |
1395 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1396 | acpi_thermal_dir); |
1da177e4 | 1397 | if (!acpi_device_dir(device)) |
d550d98d | 1398 | return -ENODEV; |
1da177e4 LT |
1399 | acpi_device_dir(device)->owner = THIS_MODULE; |
1400 | } | |
1401 | ||
1402 | /* 'state' [R] */ | |
1403 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1404 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1405 | if (!entry) |
d550d98d | 1406 | return -ENODEV; |
1da177e4 LT |
1407 | else { |
1408 | entry->proc_fops = &acpi_thermal_state_fops; | |
1409 | entry->data = acpi_driver_data(device); | |
1410 | entry->owner = THIS_MODULE; | |
1411 | } | |
1412 | ||
1413 | /* 'temperature' [R] */ | |
1414 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1415 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1416 | if (!entry) |
d550d98d | 1417 | return -ENODEV; |
1da177e4 LT |
1418 | else { |
1419 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1420 | entry->data = acpi_driver_data(device); | |
1421 | entry->owner = THIS_MODULE; | |
1422 | } | |
1423 | ||
2db9ccba | 1424 | /* 'trip_points' [R] */ |
1da177e4 | 1425 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, |
2db9ccba | 1426 | S_IRUGO, |
4be44fcd | 1427 | acpi_device_dir(device)); |
1da177e4 | 1428 | if (!entry) |
d550d98d | 1429 | return -ENODEV; |
1da177e4 LT |
1430 | else { |
1431 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1432 | entry->data = acpi_driver_data(device); | |
1433 | entry->owner = THIS_MODULE; | |
1434 | } | |
1435 | ||
1436 | /* 'cooling_mode' [R/W] */ | |
1437 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1438 | S_IFREG | S_IRUGO | S_IWUSR, |
1439 | acpi_device_dir(device)); | |
1da177e4 | 1440 | if (!entry) |
d550d98d | 1441 | return -ENODEV; |
1da177e4 LT |
1442 | else { |
1443 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1444 | entry->data = acpi_driver_data(device); | |
1445 | entry->owner = THIS_MODULE; | |
1446 | } | |
1447 | ||
1448 | /* 'polling_frequency' [R/W] */ | |
1449 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1450 | S_IFREG | S_IRUGO | S_IWUSR, |
1451 | acpi_device_dir(device)); | |
1da177e4 | 1452 | if (!entry) |
d550d98d | 1453 | return -ENODEV; |
1da177e4 LT |
1454 | else { |
1455 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1456 | entry->data = acpi_driver_data(device); | |
1457 | entry->owner = THIS_MODULE; | |
1458 | } | |
1459 | ||
d550d98d | 1460 | return 0; |
1da177e4 LT |
1461 | } |
1462 | ||
4be44fcd | 1463 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1464 | { |
1da177e4 LT |
1465 | |
1466 | if (acpi_device_dir(device)) { | |
1467 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1468 | acpi_device_dir(device)); | |
1469 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1470 | acpi_device_dir(device)); | |
1471 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1472 | acpi_device_dir(device)); | |
1473 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1474 | acpi_device_dir(device)); | |
1475 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1476 | acpi_device_dir(device)); | |
1477 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1478 | acpi_device_dir(device) = NULL; | |
1479 | } | |
1480 | ||
d550d98d | 1481 | return 0; |
1da177e4 LT |
1482 | } |
1483 | ||
1da177e4 LT |
1484 | /* -------------------------------------------------------------------------- |
1485 | Driver Interface | |
1486 | -------------------------------------------------------------------------- */ | |
1487 | ||
4be44fcd | 1488 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1489 | { |
50dd0969 | 1490 | struct acpi_thermal *tz = data; |
4be44fcd | 1491 | struct acpi_device *device = NULL; |
1da177e4 | 1492 | |
1da177e4 LT |
1493 | |
1494 | if (!tz) | |
d550d98d | 1495 | return; |
1da177e4 | 1496 | |
8348e1b1 | 1497 | device = tz->device; |
1da177e4 LT |
1498 | |
1499 | switch (event) { | |
1500 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1501 | acpi_thermal_check(tz); | |
1502 | break; | |
1503 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1504 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1505 | acpi_thermal_check(tz); |
14e04fb3 | 1506 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1507 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1508 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1509 | break; |
1510 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1511 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1512 | acpi_thermal_check(tz); | |
14e04fb3 | 1513 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1514 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1515 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1516 | break; |
1517 | default: | |
1518 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1519 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1520 | break; |
1521 | } | |
1522 | ||
d550d98d | 1523 | return; |
1da177e4 LT |
1524 | } |
1525 | ||
4be44fcd | 1526 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1527 | { |
4be44fcd | 1528 | int result = 0; |
1da177e4 | 1529 | |
1da177e4 LT |
1530 | |
1531 | if (!tz) | |
d550d98d | 1532 | return -EINVAL; |
1da177e4 LT |
1533 | |
1534 | /* Get temperature [_TMP] (required) */ | |
1535 | result = acpi_thermal_get_temperature(tz); | |
1536 | if (result) | |
d550d98d | 1537 | return result; |
1da177e4 LT |
1538 | |
1539 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1540 | result = acpi_thermal_get_trip_points(tz); | |
1541 | if (result) | |
d550d98d | 1542 | return result; |
1da177e4 LT |
1543 | |
1544 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1545 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1546 | if (!result) |
1da177e4 | 1547 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1548 | |
1549 | /* Get default polling frequency [_TZP] (optional) */ | |
1550 | if (tzp) | |
1551 | tz->polling_frequency = tzp; | |
1552 | else | |
1553 | acpi_thermal_get_polling_frequency(tz); | |
1554 | ||
d550d98d | 1555 | return 0; |
1da177e4 LT |
1556 | } |
1557 | ||
4be44fcd | 1558 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1559 | { |
4be44fcd LB |
1560 | int result = 0; |
1561 | acpi_status status = AE_OK; | |
1562 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1563 | |
1da177e4 LT |
1564 | |
1565 | if (!device) | |
d550d98d | 1566 | return -EINVAL; |
1da177e4 | 1567 | |
36bcbec7 | 1568 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1569 | if (!tz) |
d550d98d | 1570 | return -ENOMEM; |
1da177e4 | 1571 | |
8348e1b1 | 1572 | tz->device = device; |
1da177e4 LT |
1573 | strcpy(tz->name, device->pnp.bus_id); |
1574 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1575 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1576 | acpi_driver_data(device) = tz; | |
6e215785 | 1577 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1578 | |
1579 | ||
1da177e4 LT |
1580 | result = acpi_thermal_get_info(tz); |
1581 | if (result) | |
3f655ef8 ZR |
1582 | goto free_memory; |
1583 | ||
1584 | result = acpi_thermal_register_thermal_zone(tz); | |
1585 | if (result) | |
1586 | goto free_memory; | |
1da177e4 LT |
1587 | |
1588 | result = acpi_thermal_add_fs(device); | |
1589 | if (result) | |
3f655ef8 | 1590 | goto unregister_thermal_zone; |
1da177e4 LT |
1591 | |
1592 | init_timer(&tz->timer); | |
1593 | ||
1594 | acpi_thermal_check(tz); | |
1595 | ||
38ba7c9e | 1596 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1597 | ACPI_DEVICE_NOTIFY, |
1598 | acpi_thermal_notify, tz); | |
1da177e4 | 1599 | if (ACPI_FAILURE(status)) { |
1da177e4 | 1600 | result = -ENODEV; |
3f655ef8 | 1601 | goto remove_fs; |
1da177e4 LT |
1602 | } |
1603 | ||
1604 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1605 | acpi_device_name(device), acpi_device_bid(device), |
1606 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1607 | goto end; |
1da177e4 | 1608 | |
3f655ef8 ZR |
1609 | remove_fs: |
1610 | acpi_thermal_remove_fs(device); | |
1611 | unregister_thermal_zone: | |
1612 | thermal_zone_device_unregister(tz->thermal_zone); | |
1613 | free_memory: | |
1614 | kfree(tz); | |
1615 | end: | |
d550d98d | 1616 | return result; |
1da177e4 LT |
1617 | } |
1618 | ||
4be44fcd | 1619 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1620 | { |
4be44fcd LB |
1621 | acpi_status status = AE_OK; |
1622 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1623 | |
1da177e4 LT |
1624 | |
1625 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1626 | return -EINVAL; |
1da177e4 | 1627 | |
50dd0969 | 1628 | tz = acpi_driver_data(device); |
1da177e4 LT |
1629 | |
1630 | /* avoid timer adding new defer task */ | |
1631 | tz->zombie = 1; | |
1632 | /* wait for running timer (on other CPUs) finish */ | |
1633 | del_timer_sync(&(tz->timer)); | |
1634 | /* synchronize deferred task */ | |
1635 | acpi_os_wait_events_complete(NULL); | |
1636 | /* deferred task may reinsert timer */ | |
1637 | del_timer_sync(&(tz->timer)); | |
1638 | ||
38ba7c9e | 1639 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1640 | ACPI_DEVICE_NOTIFY, |
1641 | acpi_thermal_notify); | |
1da177e4 LT |
1642 | |
1643 | /* Terminate policy */ | |
4be44fcd | 1644 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1645 | tz->trips.passive.flags.enabled = 0; |
1646 | acpi_thermal_passive(tz); | |
1647 | } | |
1648 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1649 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1650 | tz->trips.active[0].flags.enabled = 0; |
1651 | acpi_thermal_active(tz); | |
1652 | } | |
1653 | ||
1654 | acpi_thermal_remove_fs(device); | |
3f655ef8 | 1655 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1656 | mutex_destroy(&tz->lock); |
1da177e4 | 1657 | kfree(tz); |
d550d98d | 1658 | return 0; |
1da177e4 LT |
1659 | } |
1660 | ||
5d9464a4 | 1661 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1662 | { |
1663 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1664 | int i, j, power_state, result; |
1665 | ||
74ce1468 KK |
1666 | |
1667 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1668 | return -EINVAL; |
74ce1468 | 1669 | |
50dd0969 | 1670 | tz = acpi_driver_data(device); |
74ce1468 | 1671 | |
bed936f7 | 1672 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1673 | if (!(&tz->trips.active[i])) |
1674 | break; | |
1675 | if (!tz->trips.active[i].flags.valid) | |
1676 | break; | |
1677 | tz->trips.active[i].flags.enabled = 1; | |
1678 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1679 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1680 | handles[j], &power_state); | |
1681 | if (result || (power_state != ACPI_STATE_D0)) { | |
1682 | tz->trips.active[i].flags.enabled = 0; | |
1683 | break; | |
1684 | } | |
bed936f7 | 1685 | } |
b1028c54 | 1686 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1687 | } |
1688 | ||
b1028c54 | 1689 | acpi_thermal_check(tz); |
74ce1468 KK |
1690 | |
1691 | return AE_OK; | |
1692 | } | |
1693 | ||
0b5bfa1c | 1694 | #ifdef CONFIG_DMI |
1855256c | 1695 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1696 | |
1697 | if (act == 0) { | |
1698 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1699 | "disabling all active thermal trip points\n", d->ident); | |
1700 | act = -1; | |
1701 | } | |
1702 | return 0; | |
1703 | } | |
1855256c | 1704 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1705 | |
1706 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1707 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1708 | nocrt = 1; | |
1709 | return 0; | |
1710 | } | |
1855256c | 1711 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1712 | |
1713 | if (tzp == 0) { | |
1714 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1715 | "enabling thermal zone polling\n", d->ident); | |
1716 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1717 | } | |
1718 | return 0; | |
1719 | } | |
1855256c | 1720 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1721 | |
1722 | if (psv == 0) { | |
1723 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1724 | "disabling all passive thermal trip points\n", d->ident); | |
1725 | psv = -1; | |
1726 | } | |
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1731 | /* | |
1732 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1733 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1734 | */ | |
1735 | { | |
1736 | .callback = thermal_act, | |
1737 | .ident = "AOpen i915GMm-HFS", | |
1738 | .matches = { | |
1739 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1740 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1741 | }, | |
1742 | }, | |
1743 | { | |
1744 | .callback = thermal_psv, | |
1745 | .ident = "AOpen i915GMm-HFS", | |
1746 | .matches = { | |
1747 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1748 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1749 | }, | |
1750 | }, | |
1751 | { | |
1752 | .callback = thermal_tzp, | |
1753 | .ident = "AOpen i915GMm-HFS", | |
1754 | .matches = { | |
1755 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1756 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1757 | }, | |
1758 | }, | |
8c99fdce LB |
1759 | { |
1760 | .callback = thermal_nocrt, | |
1761 | .ident = "Gigabyte GA-7ZX", | |
1762 | .matches = { | |
1763 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1764 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1765 | }, | |
1766 | }, | |
0b5bfa1c LB |
1767 | {} |
1768 | }; | |
1769 | #endif /* CONFIG_DMI */ | |
1770 | ||
4be44fcd | 1771 | static int __init acpi_thermal_init(void) |
1da177e4 | 1772 | { |
4be44fcd | 1773 | int result = 0; |
1da177e4 | 1774 | |
0b5bfa1c LB |
1775 | dmi_check_system(thermal_dmi_table); |
1776 | ||
72b33ef8 LB |
1777 | if (off) { |
1778 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1779 | return -ENODEV; | |
1780 | } | |
1da177e4 LT |
1781 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1782 | if (!acpi_thermal_dir) | |
d550d98d | 1783 | return -ENODEV; |
1da177e4 LT |
1784 | acpi_thermal_dir->owner = THIS_MODULE; |
1785 | ||
1786 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1787 | if (result < 0) { | |
1788 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1789 | return -ENODEV; |
1da177e4 LT |
1790 | } |
1791 | ||
d550d98d | 1792 | return 0; |
1da177e4 LT |
1793 | } |
1794 | ||
4be44fcd | 1795 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1796 | { |
1da177e4 LT |
1797 | |
1798 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1799 | ||
1800 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1801 | ||
d550d98d | 1802 | return; |
1da177e4 LT |
1803 | } |
1804 | ||
1da177e4 LT |
1805 | module_init(acpi_thermal_init); |
1806 | module_exit(acpi_thermal_exit); |