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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 | 40 | #include <linux/jiffies.h> |
1da177e4 LT |
41 | #include <linux/kmod.h> |
42 | #include <linux/seq_file.h> | |
10a0a8d4 | 43 | #include <linux/reboot.h> |
f6f5c45e | 44 | #include <linux/device.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 | ||
a192a958 LB |
50 | #define PREFIX "ACPI: " |
51 | ||
1da177e4 | 52 | #define ACPI_THERMAL_CLASS "thermal_zone" |
1da177e4 LT |
53 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
54 | #define ACPI_THERMAL_FILE_STATE "state" | |
55 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
56 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
57 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
58 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
59 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
60 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
61 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
62 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
63 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
64 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
65 | |
66 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
67 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
68 | ||
1da177e4 | 69 | #define _COMPONENT ACPI_THERMAL_COMPONENT |
f52fd66d | 70 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 71 | |
1cbf4c56 | 72 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 73 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
74 | MODULE_LICENSE("GPL"); |
75 | ||
f8707ec9 LB |
76 | static int act; |
77 | module_param(act, int, 0644); | |
3c1d36da | 78 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 79 | |
c52a7419 LB |
80 | static int crt; |
81 | module_param(crt, int, 0644); | |
82 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
83 | ||
1da177e4 | 84 | static int tzp; |
730ff34d | 85 | module_param(tzp, int, 0444); |
3c1d36da | 86 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 87 | |
f5487145 LB |
88 | static int nocrt; |
89 | module_param(nocrt, int, 0); | |
8c99fdce | 90 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 91 | |
72b33ef8 LB |
92 | static int off; |
93 | module_param(off, int, 0); | |
3c1d36da | 94 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 95 | |
a70cdc52 LB |
96 | static int psv; |
97 | module_param(psv, int, 0644); | |
3c1d36da | 98 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 99 | |
4be44fcd LB |
100 | static int acpi_thermal_add(struct acpi_device *device); |
101 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 102 | static int acpi_thermal_resume(struct acpi_device *device); |
342d550d | 103 | static void acpi_thermal_notify(struct acpi_device *device, u32 event); |
1da177e4 LT |
104 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
105 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
106 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 107 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
108 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
109 | const char __user *, size_t, | |
110 | loff_t *); | |
1da177e4 | 111 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
112 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
113 | size_t, loff_t *); | |
1da177e4 | 114 | |
1ba90e3a TR |
115 | static const struct acpi_device_id thermal_device_ids[] = { |
116 | {ACPI_THERMAL_HID, 0}, | |
117 | {"", 0}, | |
118 | }; | |
119 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
120 | ||
1da177e4 | 121 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 122 | .name = "thermal", |
4be44fcd | 123 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 124 | .ids = thermal_device_ids, |
4be44fcd LB |
125 | .ops = { |
126 | .add = acpi_thermal_add, | |
127 | .remove = acpi_thermal_remove, | |
74ce1468 | 128 | .resume = acpi_thermal_resume, |
342d550d | 129 | .notify = acpi_thermal_notify, |
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 | 196 | struct acpi_handle_list devices; |
3f655ef8 ZR |
197 | struct thermal_zone_device *thermal_zone; |
198 | int tz_enabled; | |
13614e37 | 199 | int kelvin_offset; |
6e215785 | 200 | struct mutex lock; |
1da177e4 LT |
201 | }; |
202 | ||
d7508032 | 203 | static const struct file_operations acpi_thermal_state_fops = { |
cf7acfab | 204 | .owner = THIS_MODULE, |
4be44fcd LB |
205 | .open = acpi_thermal_state_open_fs, |
206 | .read = seq_read, | |
207 | .llseek = seq_lseek, | |
208 | .release = single_release, | |
1da177e4 LT |
209 | }; |
210 | ||
d7508032 | 211 | static const struct file_operations acpi_thermal_temp_fops = { |
cf7acfab | 212 | .owner = THIS_MODULE, |
4be44fcd LB |
213 | .open = acpi_thermal_temp_open_fs, |
214 | .read = seq_read, | |
215 | .llseek = seq_lseek, | |
216 | .release = single_release, | |
1da177e4 LT |
217 | }; |
218 | ||
d7508032 | 219 | static const struct file_operations acpi_thermal_trip_fops = { |
cf7acfab | 220 | .owner = THIS_MODULE, |
4be44fcd LB |
221 | .open = acpi_thermal_trip_open_fs, |
222 | .read = seq_read, | |
4be44fcd LB |
223 | .llseek = seq_lseek, |
224 | .release = single_release, | |
1da177e4 LT |
225 | }; |
226 | ||
d7508032 | 227 | static const struct file_operations acpi_thermal_cooling_fops = { |
cf7acfab | 228 | .owner = THIS_MODULE, |
4be44fcd LB |
229 | .open = acpi_thermal_cooling_open_fs, |
230 | .read = seq_read, | |
231 | .write = acpi_thermal_write_cooling_mode, | |
232 | .llseek = seq_lseek, | |
233 | .release = single_release, | |
1da177e4 LT |
234 | }; |
235 | ||
d7508032 | 236 | static const struct file_operations acpi_thermal_polling_fops = { |
cf7acfab | 237 | .owner = THIS_MODULE, |
4be44fcd LB |
238 | .open = acpi_thermal_polling_open_fs, |
239 | .read = seq_read, | |
240 | .write = acpi_thermal_write_polling, | |
241 | .llseek = seq_lseek, | |
242 | .release = single_release, | |
1da177e4 LT |
243 | }; |
244 | ||
245 | /* -------------------------------------------------------------------------- | |
246 | Thermal Zone Management | |
247 | -------------------------------------------------------------------------- */ | |
248 | ||
4be44fcd | 249 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 250 | { |
4be44fcd | 251 | acpi_status status = AE_OK; |
27663c58 | 252 | unsigned long long tmp; |
1da177e4 LT |
253 | |
254 | if (!tz) | |
d550d98d | 255 | return -EINVAL; |
1da177e4 LT |
256 | |
257 | tz->last_temperature = tz->temperature; | |
258 | ||
27663c58 | 259 | status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp); |
1da177e4 | 260 | if (ACPI_FAILURE(status)) |
d550d98d | 261 | return -ENODEV; |
1da177e4 | 262 | |
27663c58 | 263 | tz->temperature = tmp; |
4be44fcd LB |
264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
265 | tz->temperature)); | |
1da177e4 | 266 | |
d550d98d | 267 | return 0; |
1da177e4 LT |
268 | } |
269 | ||
4be44fcd | 270 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 271 | { |
4be44fcd | 272 | acpi_status status = AE_OK; |
27663c58 | 273 | unsigned long long tmp; |
1da177e4 LT |
274 | |
275 | if (!tz) | |
d550d98d | 276 | return -EINVAL; |
1da177e4 | 277 | |
27663c58 | 278 | status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp); |
1da177e4 | 279 | if (ACPI_FAILURE(status)) |
d550d98d | 280 | return -ENODEV; |
1da177e4 | 281 | |
27663c58 | 282 | tz->polling_frequency = tmp; |
4be44fcd LB |
283 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
284 | tz->polling_frequency)); | |
1da177e4 | 285 | |
d550d98d | 286 | return 0; |
1da177e4 LT |
287 | } |
288 | ||
4be44fcd | 289 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 290 | { |
1da177e4 LT |
291 | |
292 | if (!tz) | |
d550d98d | 293 | return -EINVAL; |
1da177e4 LT |
294 | |
295 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
296 | ||
b1569e99 MG |
297 | tz->thermal_zone->polling_delay = seconds * 1000; |
298 | ||
299 | if (tz->tz_enabled) | |
300 | thermal_zone_device_update(tz->thermal_zone); | |
301 | ||
4be44fcd LB |
302 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
303 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 304 | tz->polling_frequency/10)); |
1da177e4 | 305 | |
d550d98d | 306 | return 0; |
1da177e4 LT |
307 | } |
308 | ||
4be44fcd | 309 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 310 | { |
4be44fcd LB |
311 | acpi_status status = AE_OK; |
312 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
313 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
314 | acpi_handle handle = NULL; | |
1da177e4 | 315 | |
1da177e4 LT |
316 | |
317 | if (!tz) | |
d550d98d | 318 | return -EINVAL; |
1da177e4 | 319 | |
38ba7c9e | 320 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
321 | if (ACPI_FAILURE(status)) { |
322 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 323 | return -ENODEV; |
1da177e4 LT |
324 | } |
325 | ||
326 | arg0.integer.value = mode; | |
327 | ||
328 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
329 | if (ACPI_FAILURE(status)) | |
d550d98d | 330 | return -ENODEV; |
1da177e4 | 331 | |
d550d98d | 332 | return 0; |
1da177e4 LT |
333 | } |
334 | ||
ce44e197 ZR |
335 | #define ACPI_TRIPS_CRITICAL 0x01 |
336 | #define ACPI_TRIPS_HOT 0x02 | |
337 | #define ACPI_TRIPS_PASSIVE 0x04 | |
338 | #define ACPI_TRIPS_ACTIVE 0x08 | |
339 | #define ACPI_TRIPS_DEVICES 0x10 | |
1da177e4 | 340 | |
ce44e197 ZR |
341 | #define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE) |
342 | #define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES | |
1da177e4 | 343 | |
ce44e197 ZR |
344 | #define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \ |
345 | ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \ | |
346 | ACPI_TRIPS_DEVICES) | |
1da177e4 | 347 | |
ce44e197 ZR |
348 | /* |
349 | * This exception is thrown out in two cases: | |
350 | * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid | |
351 | * when re-evaluating the AML code. | |
352 | * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change. | |
353 | * We need to re-bind the cooling devices of a thermal zone when this occurs. | |
354 | */ | |
355 | #define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \ | |
356 | do { \ | |
357 | if (flags != ACPI_TRIPS_INIT) \ | |
358 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, \ | |
359 | "ACPI thermal trip point %s changed\n" \ | |
360 | "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \ | |
361 | } while (0) | |
362 | ||
363 | static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) | |
364 | { | |
365 | acpi_status status = AE_OK; | |
27663c58 | 366 | unsigned long long tmp; |
ce44e197 ZR |
367 | struct acpi_handle_list devices; |
368 | int valid = 0; | |
369 | int i; | |
1da177e4 | 370 | |
fa809452 | 371 | /* Critical Shutdown */ |
ce44e197 ZR |
372 | if (flag & ACPI_TRIPS_CRITICAL) { |
373 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 MW |
374 | "_CRT", NULL, &tmp); |
375 | tz->trips.critical.temperature = tmp; | |
a39a2d7c AV |
376 | /* |
377 | * Treat freezing temperatures as invalid as well; some | |
378 | * BIOSes return really low values and cause reboots at startup. | |
b731d7b6 | 379 | * Below zero (Celsius) values clearly aren't right for sure.. |
a39a2d7c AV |
380 | * ... so lets discard those as invalid. |
381 | */ | |
fa809452 TR |
382 | if (ACPI_FAILURE(status)) { |
383 | tz->trips.critical.flags.valid = 0; | |
384 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
385 | "No critical threshold\n")); | |
386 | } else if (tmp <= 2732) { | |
387 | printk(KERN_WARNING FW_BUG "Invalid critical threshold " | |
388 | "(%llu)\n", tmp); | |
c52a7419 | 389 | tz->trips.critical.flags.valid = 0; |
ce44e197 ZR |
390 | } else { |
391 | tz->trips.critical.flags.valid = 1; | |
392 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
fa809452 TR |
393 | "Found critical threshold [%lu]\n", |
394 | tz->trips.critical.temperature)); | |
ce44e197 ZR |
395 | } |
396 | if (tz->trips.critical.flags.valid == 1) { | |
397 | if (crt == -1) { | |
398 | tz->trips.critical.flags.valid = 0; | |
399 | } else if (crt > 0) { | |
400 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
401 | /* | |
22a94d79 | 402 | * Allow override critical threshold |
ce44e197 | 403 | */ |
22a94d79 ZR |
404 | if (crt_k > tz->trips.critical.temperature) |
405 | printk(KERN_WARNING PREFIX | |
406 | "Critical threshold %d C\n", crt); | |
407 | tz->trips.critical.temperature = crt_k; | |
ce44e197 | 408 | } |
c52a7419 LB |
409 | } |
410 | } | |
411 | ||
1da177e4 | 412 | /* Critical Sleep (optional) */ |
ce44e197 | 413 | if (flag & ACPI_TRIPS_HOT) { |
a70cdc52 | 414 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 415 | "_HOT", NULL, &tmp); |
ce44e197 ZR |
416 | if (ACPI_FAILURE(status)) { |
417 | tz->trips.hot.flags.valid = 0; | |
418 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
419 | "No hot threshold\n")); | |
420 | } else { | |
27663c58 | 421 | tz->trips.hot.temperature = tmp; |
ce44e197 ZR |
422 | tz->trips.hot.flags.valid = 1; |
423 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
424 | "Found hot threshold [%lu]\n", | |
425 | tz->trips.critical.temperature)); | |
426 | } | |
a70cdc52 LB |
427 | } |
428 | ||
ce44e197 | 429 | /* Passive (optional) */ |
0e4240d9 ZR |
430 | if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) || |
431 | (flag == ACPI_TRIPS_INIT)) { | |
ce44e197 ZR |
432 | valid = tz->trips.passive.flags.valid; |
433 | if (psv == -1) { | |
434 | status = AE_SUPPORT; | |
435 | } else if (psv > 0) { | |
27663c58 | 436 | tmp = CELSIUS_TO_KELVIN(psv); |
ce44e197 ZR |
437 | status = AE_OK; |
438 | } else { | |
439 | status = acpi_evaluate_integer(tz->device->handle, | |
27663c58 | 440 | "_PSV", NULL, &tmp); |
ce44e197 | 441 | } |
1da177e4 | 442 | |
1da177e4 LT |
443 | if (ACPI_FAILURE(status)) |
444 | tz->trips.passive.flags.valid = 0; | |
ce44e197 | 445 | else { |
27663c58 | 446 | tz->trips.passive.temperature = tmp; |
ce44e197 ZR |
447 | tz->trips.passive.flags.valid = 1; |
448 | if (flag == ACPI_TRIPS_INIT) { | |
449 | status = acpi_evaluate_integer( | |
450 | tz->device->handle, "_TC1", | |
27663c58 | 451 | NULL, &tmp); |
ce44e197 ZR |
452 | if (ACPI_FAILURE(status)) |
453 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
454 | else |
455 | tz->trips.passive.tc1 = tmp; | |
ce44e197 ZR |
456 | status = acpi_evaluate_integer( |
457 | tz->device->handle, "_TC2", | |
27663c58 | 458 | NULL, &tmp); |
ce44e197 ZR |
459 | if (ACPI_FAILURE(status)) |
460 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
461 | else |
462 | tz->trips.passive.tc2 = tmp; | |
ce44e197 ZR |
463 | status = acpi_evaluate_integer( |
464 | tz->device->handle, "_TSP", | |
27663c58 | 465 | NULL, &tmp); |
ce44e197 ZR |
466 | if (ACPI_FAILURE(status)) |
467 | tz->trips.passive.flags.valid = 0; | |
27663c58 MW |
468 | else |
469 | tz->trips.passive.tsp = tmp; | |
ce44e197 ZR |
470 | } |
471 | } | |
472 | } | |
473 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) { | |
474 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
475 | status = acpi_evaluate_reference(tz->device->handle, "_PSL", | |
476 | NULL, &devices); | |
0e4240d9 ZR |
477 | if (ACPI_FAILURE(status)) { |
478 | printk(KERN_WARNING PREFIX | |
479 | "Invalid passive threshold\n"); | |
1da177e4 | 480 | tz->trips.passive.flags.valid = 0; |
0e4240d9 | 481 | } |
1da177e4 | 482 | else |
ce44e197 | 483 | tz->trips.passive.flags.valid = 1; |
1da177e4 | 484 | |
ce44e197 ZR |
485 | if (memcmp(&tz->trips.passive.devices, &devices, |
486 | sizeof(struct acpi_handle_list))) { | |
487 | memcpy(&tz->trips.passive.devices, &devices, | |
488 | sizeof(struct acpi_handle_list)); | |
489 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
490 | } | |
491 | } | |
492 | if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) { | |
493 | if (valid != tz->trips.passive.flags.valid) | |
494 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
495 | } | |
1da177e4 | 496 | |
ce44e197 | 497 | /* Active (optional) */ |
4be44fcd | 498 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
4be44fcd | 499 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
ce44e197 | 500 | valid = tz->trips.active[i].flags.valid; |
1da177e4 | 501 | |
f8707ec9 | 502 | if (act == -1) |
ce44e197 ZR |
503 | break; /* disable all active trip points */ |
504 | ||
0e4240d9 ZR |
505 | if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) && |
506 | tz->trips.active[i].flags.valid)) { | |
ce44e197 | 507 | status = acpi_evaluate_integer(tz->device->handle, |
27663c58 | 508 | name, NULL, &tmp); |
ce44e197 ZR |
509 | if (ACPI_FAILURE(status)) { |
510 | tz->trips.active[i].flags.valid = 0; | |
511 | if (i == 0) | |
512 | break; | |
513 | if (act <= 0) | |
514 | break; | |
515 | if (i == 1) | |
516 | tz->trips.active[0].temperature = | |
517 | CELSIUS_TO_KELVIN(act); | |
518 | else | |
519 | /* | |
520 | * Don't allow override higher than | |
521 | * the next higher trip point | |
522 | */ | |
523 | tz->trips.active[i - 1].temperature = | |
524 | (tz->trips.active[i - 2].temperature < | |
525 | CELSIUS_TO_KELVIN(act) ? | |
526 | tz->trips.active[i - 2].temperature : | |
527 | CELSIUS_TO_KELVIN(act)); | |
f8707ec9 | 528 | break; |
27663c58 MW |
529 | } else { |
530 | tz->trips.active[i].temperature = tmp; | |
ce44e197 | 531 | tz->trips.active[i].flags.valid = 1; |
27663c58 | 532 | } |
f8707ec9 | 533 | } |
1da177e4 LT |
534 | |
535 | name[2] = 'L'; | |
ce44e197 ZR |
536 | if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) { |
537 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
538 | status = acpi_evaluate_reference(tz->device->handle, | |
539 | name, NULL, &devices); | |
0e4240d9 ZR |
540 | if (ACPI_FAILURE(status)) { |
541 | printk(KERN_WARNING PREFIX | |
542 | "Invalid active%d threshold\n", i); | |
ce44e197 | 543 | tz->trips.active[i].flags.valid = 0; |
0e4240d9 | 544 | } |
ce44e197 ZR |
545 | else |
546 | tz->trips.active[i].flags.valid = 1; | |
547 | ||
548 | if (memcmp(&tz->trips.active[i].devices, &devices, | |
549 | sizeof(struct acpi_handle_list))) { | |
550 | memcpy(&tz->trips.active[i].devices, &devices, | |
551 | sizeof(struct acpi_handle_list)); | |
552 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
553 | } | |
554 | } | |
555 | if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES)) | |
556 | if (valid != tz->trips.active[i].flags.valid) | |
557 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state"); | |
558 | ||
559 | if (!tz->trips.active[i].flags.valid) | |
560 | break; | |
561 | } | |
562 | ||
563 | if (flag & ACPI_TRIPS_DEVICES) { | |
564 | memset(&devices, 0, sizeof(struct acpi_handle_list)); | |
565 | status = acpi_evaluate_reference(tz->device->handle, "_TZD", | |
566 | NULL, &devices); | |
567 | if (memcmp(&tz->devices, &devices, | |
568 | sizeof(struct acpi_handle_list))) { | |
569 | memcpy(&tz->devices, &devices, | |
570 | sizeof(struct acpi_handle_list)); | |
571 | ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device"); | |
572 | } | |
1da177e4 LT |
573 | } |
574 | ||
d550d98d | 575 | return 0; |
1da177e4 LT |
576 | } |
577 | ||
ce44e197 | 578 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 579 | { |
8b7ef6d8 TR |
580 | int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); |
581 | ||
582 | if (ret) | |
583 | return ret; | |
584 | ||
585 | valid = tz->trips.critical.flags.valid | | |
586 | tz->trips.hot.flags.valid | | |
587 | tz->trips.passive.flags.valid; | |
588 | ||
589 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
590 | valid |= tz->trips.active[i].flags.valid; | |
591 | ||
592 | if (!valid) { | |
593 | printk(KERN_WARNING FW_BUG "No valid trip found\n"); | |
594 | return -ENODEV; | |
595 | } | |
596 | return 0; | |
1da177e4 LT |
597 | } |
598 | ||
4be44fcd | 599 | static void acpi_thermal_check(void *data) |
1da177e4 | 600 | { |
50dd0969 | 601 | struct acpi_thermal *tz = data; |
1da177e4 | 602 | |
b1569e99 | 603 | thermal_zone_device_update(tz->thermal_zone); |
1da177e4 LT |
604 | } |
605 | ||
3f655ef8 | 606 | /* sys I/F for generic thermal sysfs support */ |
13614e37 | 607 | #define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100) |
5e012760 | 608 | |
6503e5df MG |
609 | static int thermal_get_temp(struct thermal_zone_device *thermal, |
610 | unsigned long *temp) | |
3f655ef8 ZR |
611 | { |
612 | struct acpi_thermal *tz = thermal->devdata; | |
76ecb4f2 | 613 | int result; |
3f655ef8 ZR |
614 | |
615 | if (!tz) | |
616 | return -EINVAL; | |
617 | ||
76ecb4f2 ZR |
618 | result = acpi_thermal_get_temperature(tz); |
619 | if (result) | |
620 | return result; | |
621 | ||
13614e37 | 622 | *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset); |
6503e5df | 623 | return 0; |
3f655ef8 ZR |
624 | } |
625 | ||
626 | static const char enabled[] = "kernel"; | |
627 | static const char disabled[] = "user"; | |
628 | static int thermal_get_mode(struct thermal_zone_device *thermal, | |
6503e5df | 629 | enum thermal_device_mode *mode) |
3f655ef8 ZR |
630 | { |
631 | struct acpi_thermal *tz = thermal->devdata; | |
632 | ||
633 | if (!tz) | |
634 | return -EINVAL; | |
635 | ||
6503e5df MG |
636 | *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED : |
637 | THERMAL_DEVICE_DISABLED; | |
638 | ||
639 | return 0; | |
3f655ef8 ZR |
640 | } |
641 | ||
642 | static int thermal_set_mode(struct thermal_zone_device *thermal, | |
6503e5df | 643 | enum thermal_device_mode mode) |
3f655ef8 ZR |
644 | { |
645 | struct acpi_thermal *tz = thermal->devdata; | |
646 | int enable; | |
647 | ||
648 | if (!tz) | |
649 | return -EINVAL; | |
650 | ||
651 | /* | |
652 | * enable/disable thermal management from ACPI thermal driver | |
653 | */ | |
6503e5df | 654 | if (mode == THERMAL_DEVICE_ENABLED) |
3f655ef8 | 655 | enable = 1; |
6503e5df | 656 | else if (mode == THERMAL_DEVICE_DISABLED) |
3f655ef8 ZR |
657 | enable = 0; |
658 | else | |
659 | return -EINVAL; | |
660 | ||
661 | if (enable != tz->tz_enabled) { | |
662 | tz->tz_enabled = enable; | |
663 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
664 | "%s ACPI thermal control\n", | |
665 | tz->tz_enabled ? enabled : disabled)); | |
666 | acpi_thermal_check(tz); | |
667 | } | |
668 | return 0; | |
669 | } | |
670 | ||
671 | static int thermal_get_trip_type(struct thermal_zone_device *thermal, | |
6503e5df | 672 | int trip, enum thermal_trip_type *type) |
3f655ef8 ZR |
673 | { |
674 | struct acpi_thermal *tz = thermal->devdata; | |
675 | int i; | |
676 | ||
677 | if (!tz || trip < 0) | |
678 | return -EINVAL; | |
679 | ||
680 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
681 | if (!trip) { |
682 | *type = THERMAL_TRIP_CRITICAL; | |
683 | return 0; | |
684 | } | |
3f655ef8 ZR |
685 | trip--; |
686 | } | |
687 | ||
688 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
689 | if (!trip) { |
690 | *type = THERMAL_TRIP_HOT; | |
691 | return 0; | |
692 | } | |
3f655ef8 ZR |
693 | trip--; |
694 | } | |
695 | ||
696 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
697 | if (!trip) { |
698 | *type = THERMAL_TRIP_PASSIVE; | |
699 | return 0; | |
700 | } | |
3f655ef8 ZR |
701 | trip--; |
702 | } | |
703 | ||
704 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
705 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
706 | if (!trip) { |
707 | *type = THERMAL_TRIP_ACTIVE; | |
708 | return 0; | |
709 | } | |
3f655ef8 ZR |
710 | trip--; |
711 | } | |
712 | ||
713 | return -EINVAL; | |
714 | } | |
715 | ||
716 | static int thermal_get_trip_temp(struct thermal_zone_device *thermal, | |
6503e5df | 717 | int trip, unsigned long *temp) |
3f655ef8 ZR |
718 | { |
719 | struct acpi_thermal *tz = thermal->devdata; | |
720 | int i; | |
721 | ||
722 | if (!tz || trip < 0) | |
723 | return -EINVAL; | |
724 | ||
725 | if (tz->trips.critical.flags.valid) { | |
6503e5df MG |
726 | if (!trip) { |
727 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
728 | tz->trips.critical.temperature, |
729 | tz->kelvin_offset); | |
6503e5df MG |
730 | return 0; |
731 | } | |
3f655ef8 ZR |
732 | trip--; |
733 | } | |
734 | ||
735 | if (tz->trips.hot.flags.valid) { | |
6503e5df MG |
736 | if (!trip) { |
737 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
738 | tz->trips.hot.temperature, |
739 | tz->kelvin_offset); | |
6503e5df MG |
740 | return 0; |
741 | } | |
3f655ef8 ZR |
742 | trip--; |
743 | } | |
744 | ||
745 | if (tz->trips.passive.flags.valid) { | |
6503e5df MG |
746 | if (!trip) { |
747 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
748 | tz->trips.passive.temperature, |
749 | tz->kelvin_offset); | |
6503e5df MG |
750 | return 0; |
751 | } | |
3f655ef8 ZR |
752 | trip--; |
753 | } | |
754 | ||
755 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
756 | tz->trips.active[i].flags.valid; i++) { | |
6503e5df MG |
757 | if (!trip) { |
758 | *temp = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
759 | tz->trips.active[i].temperature, |
760 | tz->kelvin_offset); | |
6503e5df MG |
761 | return 0; |
762 | } | |
3f655ef8 ZR |
763 | trip--; |
764 | } | |
765 | ||
766 | return -EINVAL; | |
767 | } | |
768 | ||
9ec732ff ZR |
769 | static int thermal_get_crit_temp(struct thermal_zone_device *thermal, |
770 | unsigned long *temperature) { | |
771 | struct acpi_thermal *tz = thermal->devdata; | |
772 | ||
773 | if (tz->trips.critical.flags.valid) { | |
774 | *temperature = KELVIN_TO_MILLICELSIUS( | |
13614e37 JD |
775 | tz->trips.critical.temperature, |
776 | tz->kelvin_offset); | |
9ec732ff ZR |
777 | return 0; |
778 | } else | |
779 | return -EINVAL; | |
780 | } | |
781 | ||
b1569e99 MG |
782 | static int thermal_notify(struct thermal_zone_device *thermal, int trip, |
783 | enum thermal_trip_type trip_type) | |
784 | { | |
785 | u8 type = 0; | |
786 | struct acpi_thermal *tz = thermal->devdata; | |
787 | ||
788 | if (trip_type == THERMAL_TRIP_CRITICAL) | |
789 | type = ACPI_THERMAL_NOTIFY_CRITICAL; | |
790 | else if (trip_type == THERMAL_TRIP_HOT) | |
791 | type = ACPI_THERMAL_NOTIFY_HOT; | |
792 | else | |
793 | return 0; | |
794 | ||
795 | acpi_bus_generate_proc_event(tz->device, type, 1); | |
796 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, | |
f6f5c45e | 797 | dev_name(&tz->device->dev), type, 1); |
b1569e99 MG |
798 | |
799 | if (trip_type == THERMAL_TRIP_CRITICAL && nocrt) | |
800 | return 1; | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
3f655ef8 ZR |
805 | typedef int (*cb)(struct thermal_zone_device *, int, |
806 | struct thermal_cooling_device *); | |
807 | static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, | |
808 | struct thermal_cooling_device *cdev, | |
809 | cb action) | |
810 | { | |
811 | struct acpi_device *device = cdev->devdata; | |
812 | struct acpi_thermal *tz = thermal->devdata; | |
653a00c9 ZR |
813 | struct acpi_device *dev; |
814 | acpi_status status; | |
815 | acpi_handle handle; | |
3f655ef8 ZR |
816 | int i; |
817 | int j; | |
818 | int trip = -1; | |
819 | int result = 0; | |
820 | ||
821 | if (tz->trips.critical.flags.valid) | |
822 | trip++; | |
823 | ||
824 | if (tz->trips.hot.flags.valid) | |
825 | trip++; | |
826 | ||
827 | if (tz->trips.passive.flags.valid) { | |
828 | trip++; | |
829 | for (i = 0; i < tz->trips.passive.devices.count; | |
830 | i++) { | |
653a00c9 ZR |
831 | handle = tz->trips.passive.devices.handles[i]; |
832 | status = acpi_bus_get_device(handle, &dev); | |
833 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
834 | result = action(thermal, trip, cdev); | |
835 | if (result) | |
836 | goto failed; | |
837 | } | |
3f655ef8 ZR |
838 | } |
839 | } | |
840 | ||
841 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
842 | if (!tz->trips.active[i].flags.valid) | |
843 | break; | |
844 | trip++; | |
845 | for (j = 0; | |
846 | j < tz->trips.active[i].devices.count; | |
847 | j++) { | |
653a00c9 ZR |
848 | handle = tz->trips.active[i].devices.handles[j]; |
849 | status = acpi_bus_get_device(handle, &dev); | |
850 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
851 | result = action(thermal, trip, cdev); | |
852 | if (result) | |
853 | goto failed; | |
854 | } | |
3f655ef8 ZR |
855 | } |
856 | } | |
857 | ||
858 | for (i = 0; i < tz->devices.count; i++) { | |
653a00c9 ZR |
859 | handle = tz->devices.handles[i]; |
860 | status = acpi_bus_get_device(handle, &dev); | |
861 | if (ACPI_SUCCESS(status) && (dev == device)) { | |
862 | result = action(thermal, -1, cdev); | |
863 | if (result) | |
864 | goto failed; | |
865 | } | |
3f655ef8 ZR |
866 | } |
867 | ||
868 | failed: | |
869 | return result; | |
870 | } | |
871 | ||
872 | static int | |
873 | acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, | |
874 | struct thermal_cooling_device *cdev) | |
875 | { | |
876 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
877 | thermal_zone_bind_cooling_device); | |
878 | } | |
879 | ||
880 | static int | |
881 | acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, | |
882 | struct thermal_cooling_device *cdev) | |
883 | { | |
884 | return acpi_thermal_cooling_device_cb(thermal, cdev, | |
885 | thermal_zone_unbind_cooling_device); | |
886 | } | |
887 | ||
888 | static struct thermal_zone_device_ops acpi_thermal_zone_ops = { | |
889 | .bind = acpi_thermal_bind_cooling_device, | |
890 | .unbind = acpi_thermal_unbind_cooling_device, | |
891 | .get_temp = thermal_get_temp, | |
892 | .get_mode = thermal_get_mode, | |
893 | .set_mode = thermal_set_mode, | |
894 | .get_trip_type = thermal_get_trip_type, | |
895 | .get_trip_temp = thermal_get_trip_temp, | |
9ec732ff | 896 | .get_crit_temp = thermal_get_crit_temp, |
b1569e99 | 897 | .notify = thermal_notify, |
3f655ef8 ZR |
898 | }; |
899 | ||
900 | static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) | |
901 | { | |
902 | int trips = 0; | |
903 | int result; | |
20733939 | 904 | acpi_status status; |
3f655ef8 ZR |
905 | int i; |
906 | ||
907 | if (tz->trips.critical.flags.valid) | |
908 | trips++; | |
909 | ||
910 | if (tz->trips.hot.flags.valid) | |
911 | trips++; | |
912 | ||
913 | if (tz->trips.passive.flags.valid) | |
914 | trips++; | |
915 | ||
916 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE && | |
917 | tz->trips.active[i].flags.valid; i++, trips++); | |
b1569e99 MG |
918 | |
919 | if (tz->trips.passive.flags.valid) | |
920 | tz->thermal_zone = | |
921 | thermal_zone_device_register("acpitz", trips, tz, | |
922 | &acpi_thermal_zone_ops, | |
923 | tz->trips.passive.tc1, | |
924 | tz->trips.passive.tc2, | |
925 | tz->trips.passive.tsp*100, | |
926 | tz->polling_frequency*100); | |
927 | else | |
928 | tz->thermal_zone = | |
929 | thermal_zone_device_register("acpitz", trips, tz, | |
930 | &acpi_thermal_zone_ops, | |
931 | 0, 0, 0, | |
67405439 | 932 | tz->polling_frequency*100); |
bb070e43 | 933 | if (IS_ERR(tz->thermal_zone)) |
3f655ef8 ZR |
934 | return -ENODEV; |
935 | ||
936 | result = sysfs_create_link(&tz->device->dev.kobj, | |
937 | &tz->thermal_zone->device.kobj, "thermal_zone"); | |
938 | if (result) | |
939 | return result; | |
940 | ||
941 | result = sysfs_create_link(&tz->thermal_zone->device.kobj, | |
942 | &tz->device->dev.kobj, "device"); | |
943 | if (result) | |
944 | return result; | |
945 | ||
20733939 ZR |
946 | status = acpi_attach_data(tz->device->handle, |
947 | acpi_bus_private_data_handler, | |
948 | tz->thermal_zone); | |
949 | if (ACPI_FAILURE(status)) { | |
55ac9a01 LM |
950 | printk(KERN_ERR PREFIX |
951 | "Error attaching device data\n"); | |
20733939 ZR |
952 | return -ENODEV; |
953 | } | |
954 | ||
3f655ef8 ZR |
955 | tz->tz_enabled = 1; |
956 | ||
fc3a8828 GKH |
957 | dev_info(&tz->device->dev, "registered as thermal_zone%d\n", |
958 | tz->thermal_zone->id); | |
3f655ef8 ZR |
959 | return 0; |
960 | } | |
961 | ||
962 | static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) | |
963 | { | |
964 | sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); | |
965 | sysfs_remove_link(&tz->thermal_zone->device.kobj, "device"); | |
966 | thermal_zone_device_unregister(tz->thermal_zone); | |
967 | tz->thermal_zone = NULL; | |
20733939 | 968 | acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler); |
3f655ef8 ZR |
969 | } |
970 | ||
971 | ||
1da177e4 LT |
972 | /* -------------------------------------------------------------------------- |
973 | FS Interface (/proc) | |
974 | -------------------------------------------------------------------------- */ | |
975 | ||
4be44fcd | 976 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
977 | |
978 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
979 | { | |
50dd0969 | 980 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 981 | |
1da177e4 LT |
982 | |
983 | if (!tz) | |
984 | goto end; | |
985 | ||
986 | seq_puts(seq, "state: "); | |
987 | ||
4be44fcd LB |
988 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
989 | && !tz->state.active) | |
1da177e4 LT |
990 | seq_puts(seq, "ok\n"); |
991 | else { | |
992 | if (tz->state.critical) | |
993 | seq_puts(seq, "critical "); | |
994 | if (tz->state.hot) | |
995 | seq_puts(seq, "hot "); | |
996 | if (tz->state.passive) | |
997 | seq_puts(seq, "passive "); | |
998 | if (tz->state.active) | |
999 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
1000 | seq_puts(seq, "\n"); | |
1001 | } | |
1002 | ||
4be44fcd | 1003 | end: |
d550d98d | 1004 | return 0; |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
1008 | { | |
1009 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
1010 | } | |
1011 | ||
1da177e4 LT |
1012 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
1013 | { | |
4be44fcd | 1014 | int result = 0; |
50dd0969 | 1015 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1016 | |
1da177e4 LT |
1017 | |
1018 | if (!tz) | |
1019 | goto end; | |
1020 | ||
1021 | result = acpi_thermal_get_temperature(tz); | |
1022 | if (result) | |
1023 | goto end; | |
1024 | ||
4be44fcd LB |
1025 | seq_printf(seq, "temperature: %ld C\n", |
1026 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1027 | |
4be44fcd | 1028 | end: |
d550d98d | 1029 | return 0; |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
1033 | { | |
1034 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
1035 | } | |
1036 | ||
1da177e4 LT |
1037 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
1038 | { | |
50dd0969 | 1039 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 1040 | struct acpi_device *device; |
e7c746ef TR |
1041 | acpi_status status; |
1042 | ||
4be44fcd LB |
1043 | int i = 0; |
1044 | int j = 0; | |
1da177e4 | 1045 | |
1da177e4 LT |
1046 | |
1047 | if (!tz) | |
1048 | goto end; | |
1049 | ||
1050 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
1051 | seq_printf(seq, "critical (S5): %ld C%s", |
1052 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
1053 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1054 | |
1055 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
1056 | seq_printf(seq, "hot (S4): %ld C%s", |
1057 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
1058 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
1059 | |
1060 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
1061 | seq_printf(seq, |
1062 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
1063 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
1064 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
1065 | tz->trips.passive.tsp); | |
1066 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
1067 | status = acpi_bus_get_device(tz->trips.passive.devices. |
1068 | handles[j], &device); | |
1069 | seq_printf(seq, "%4.4s ", status ? "" : | |
1070 | acpi_device_bid(device)); | |
1da177e4 LT |
1071 | } |
1072 | seq_puts(seq, "\n"); | |
7fb2616e FP |
1073 | } else { |
1074 | seq_printf(seq, "passive (forced):"); | |
1075 | if (tz->thermal_zone->forced_passive) | |
1076 | seq_printf(seq, " %i C\n", | |
1077 | tz->thermal_zone->forced_passive / 1000); | |
1078 | else | |
1079 | seq_printf(seq, "<not set>\n"); | |
1da177e4 LT |
1080 | } |
1081 | ||
1082 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
1083 | if (!(tz->trips.active[i].flags.valid)) | |
1084 | break; | |
1085 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
1086 | i, |
1087 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 1088 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
1089 | status = acpi_bus_get_device(tz->trips.active[i]. |
1090 | devices.handles[j], | |
1091 | &device); | |
1092 | seq_printf(seq, "%4.4s ", status ? "" : | |
1093 | acpi_device_bid(device)); | |
68ccfaa8 | 1094 | } |
1da177e4 LT |
1095 | seq_puts(seq, "\n"); |
1096 | } | |
1097 | ||
4be44fcd | 1098 | end: |
d550d98d | 1099 | return 0; |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
1103 | { | |
1104 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
1105 | } | |
1106 | ||
1da177e4 LT |
1107 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
1108 | { | |
50dd0969 | 1109 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1110 | |
1da177e4 LT |
1111 | |
1112 | if (!tz) | |
1113 | goto end; | |
1114 | ||
eaca2d3f | 1115 | if (!tz->flags.cooling_mode) |
1da177e4 | 1116 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 1117 | else |
eaca2d3f | 1118 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 1119 | |
4be44fcd | 1120 | end: |
d550d98d | 1121 | return 0; |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1125 | { | |
1126 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1127 | PDE(inode)->data); |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | static ssize_t | |
4be44fcd LB |
1131 | acpi_thermal_write_cooling_mode(struct file *file, |
1132 | const char __user * buffer, | |
1133 | size_t count, loff_t * ppos) | |
1da177e4 | 1134 | { |
50dd0969 JE |
1135 | struct seq_file *m = file->private_data; |
1136 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1137 | int result = 0; |
1138 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1139 | |
1da177e4 LT |
1140 | |
1141 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1142 | return -EINVAL; |
1da177e4 LT |
1143 | |
1144 | if (!tz->flags.cooling_mode) | |
d550d98d | 1145 | return -ENODEV; |
1da177e4 LT |
1146 | |
1147 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1148 | return -EFAULT; |
4be44fcd | 1149 | |
1da177e4 | 1150 | mode_string[count] = '\0'; |
4be44fcd LB |
1151 | |
1152 | result = acpi_thermal_set_cooling_mode(tz, | |
1153 | simple_strtoul(mode_string, NULL, | |
1154 | 0)); | |
1da177e4 | 1155 | if (result) |
d550d98d | 1156 | return result; |
1da177e4 LT |
1157 | |
1158 | acpi_thermal_check(tz); | |
1159 | ||
d550d98d | 1160 | return count; |
1da177e4 LT |
1161 | } |
1162 | ||
1da177e4 LT |
1163 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1164 | { | |
50dd0969 | 1165 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1166 | |
1da177e4 LT |
1167 | |
1168 | if (!tz) | |
1169 | goto end; | |
1170 | ||
b1569e99 | 1171 | if (!tz->thermal_zone->polling_delay) { |
1da177e4 LT |
1172 | seq_puts(seq, "<polling disabled>\n"); |
1173 | goto end; | |
1174 | } | |
1175 | ||
b1569e99 MG |
1176 | seq_printf(seq, "polling frequency: %d seconds\n", |
1177 | (tz->thermal_zone->polling_delay / 1000)); | |
1da177e4 | 1178 | |
4be44fcd | 1179 | end: |
d550d98d | 1180 | return 0; |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1184 | { | |
1185 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1186 | PDE(inode)->data); |
1da177e4 LT |
1187 | } |
1188 | ||
1189 | static ssize_t | |
4be44fcd LB |
1190 | acpi_thermal_write_polling(struct file *file, |
1191 | const char __user * buffer, | |
1192 | size_t count, loff_t * ppos) | |
1da177e4 | 1193 | { |
50dd0969 JE |
1194 | struct seq_file *m = file->private_data; |
1195 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1196 | int result = 0; |
1197 | char polling_string[12] = { '\0' }; | |
1198 | int seconds = 0; | |
1da177e4 | 1199 | |
1da177e4 LT |
1200 | |
1201 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1202 | return -EINVAL; |
4be44fcd | 1203 | |
1da177e4 | 1204 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1205 | return -EFAULT; |
4be44fcd | 1206 | |
1da177e4 LT |
1207 | polling_string[count] = '\0'; |
1208 | ||
1209 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1210 | |
1da177e4 LT |
1211 | result = acpi_thermal_set_polling(tz, seconds); |
1212 | if (result) | |
d550d98d | 1213 | return result; |
1da177e4 LT |
1214 | |
1215 | acpi_thermal_check(tz); | |
1216 | ||
d550d98d | 1217 | return count; |
1da177e4 LT |
1218 | } |
1219 | ||
4be44fcd | 1220 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1221 | { |
4be44fcd | 1222 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1223 | |
1da177e4 LT |
1224 | |
1225 | if (!acpi_device_dir(device)) { | |
1226 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1227 | acpi_thermal_dir); |
1da177e4 | 1228 | if (!acpi_device_dir(device)) |
d550d98d | 1229 | return -ENODEV; |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | /* 'state' [R] */ | |
cf7acfab DL |
1233 | entry = proc_create_data(ACPI_THERMAL_FILE_STATE, |
1234 | S_IRUGO, acpi_device_dir(device), | |
1235 | &acpi_thermal_state_fops, | |
1236 | acpi_driver_data(device)); | |
1da177e4 | 1237 | if (!entry) |
d550d98d | 1238 | return -ENODEV; |
1da177e4 LT |
1239 | |
1240 | /* 'temperature' [R] */ | |
cf7acfab DL |
1241 | entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE, |
1242 | S_IRUGO, acpi_device_dir(device), | |
1243 | &acpi_thermal_temp_fops, | |
1244 | acpi_driver_data(device)); | |
1da177e4 | 1245 | if (!entry) |
d550d98d | 1246 | return -ENODEV; |
1da177e4 | 1247 | |
2db9ccba | 1248 | /* 'trip_points' [R] */ |
cf7acfab DL |
1249 | entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS, |
1250 | S_IRUGO, | |
1251 | acpi_device_dir(device), | |
1252 | &acpi_thermal_trip_fops, | |
1253 | acpi_driver_data(device)); | |
1da177e4 | 1254 | if (!entry) |
d550d98d | 1255 | return -ENODEV; |
1da177e4 LT |
1256 | |
1257 | /* 'cooling_mode' [R/W] */ | |
cf7acfab DL |
1258 | entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE, |
1259 | S_IFREG | S_IRUGO | S_IWUSR, | |
1260 | acpi_device_dir(device), | |
1261 | &acpi_thermal_cooling_fops, | |
1262 | acpi_driver_data(device)); | |
1da177e4 | 1263 | if (!entry) |
d550d98d | 1264 | return -ENODEV; |
1da177e4 LT |
1265 | |
1266 | /* 'polling_frequency' [R/W] */ | |
cf7acfab DL |
1267 | entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ, |
1268 | S_IFREG | S_IRUGO | S_IWUSR, | |
1269 | acpi_device_dir(device), | |
1270 | &acpi_thermal_polling_fops, | |
1271 | acpi_driver_data(device)); | |
1da177e4 | 1272 | if (!entry) |
d550d98d | 1273 | return -ENODEV; |
d550d98d | 1274 | return 0; |
1da177e4 LT |
1275 | } |
1276 | ||
4be44fcd | 1277 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1278 | { |
1da177e4 LT |
1279 | |
1280 | if (acpi_device_dir(device)) { | |
1281 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1282 | acpi_device_dir(device)); | |
1283 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1284 | acpi_device_dir(device)); | |
1285 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1286 | acpi_device_dir(device)); | |
1287 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1288 | acpi_device_dir(device)); | |
1289 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1290 | acpi_device_dir(device)); | |
1291 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1292 | acpi_device_dir(device) = NULL; | |
1293 | } | |
1294 | ||
d550d98d | 1295 | return 0; |
1da177e4 LT |
1296 | } |
1297 | ||
1da177e4 LT |
1298 | /* -------------------------------------------------------------------------- |
1299 | Driver Interface | |
1300 | -------------------------------------------------------------------------- */ | |
1301 | ||
342d550d | 1302 | static void acpi_thermal_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1303 | { |
342d550d | 1304 | struct acpi_thermal *tz = acpi_driver_data(device); |
1da177e4 | 1305 | |
1da177e4 LT |
1306 | |
1307 | if (!tz) | |
d550d98d | 1308 | return; |
1da177e4 | 1309 | |
1da177e4 LT |
1310 | switch (event) { |
1311 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1312 | acpi_thermal_check(tz); | |
1313 | break; | |
1314 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
ce44e197 | 1315 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS); |
1da177e4 | 1316 | acpi_thermal_check(tz); |
14e04fb3 | 1317 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 1318 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1319 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
1320 | break; |
1321 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
ce44e197 ZR |
1322 | acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES); |
1323 | acpi_thermal_check(tz); | |
14e04fb3 | 1324 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 1325 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 1326 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
1327 | break; |
1328 | default: | |
1329 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1330 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1331 | break; |
1332 | } | |
1da177e4 LT |
1333 | } |
1334 | ||
4be44fcd | 1335 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1336 | { |
4be44fcd | 1337 | int result = 0; |
1da177e4 | 1338 | |
1da177e4 LT |
1339 | |
1340 | if (!tz) | |
d550d98d | 1341 | return -EINVAL; |
1da177e4 LT |
1342 | |
1343 | /* Get temperature [_TMP] (required) */ | |
1344 | result = acpi_thermal_get_temperature(tz); | |
1345 | if (result) | |
d550d98d | 1346 | return result; |
1da177e4 LT |
1347 | |
1348 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1349 | result = acpi_thermal_get_trip_points(tz); | |
1350 | if (result) | |
d550d98d | 1351 | return result; |
1da177e4 LT |
1352 | |
1353 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1354 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1355 | if (!result) |
1da177e4 | 1356 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1357 | |
1358 | /* Get default polling frequency [_TZP] (optional) */ | |
1359 | if (tzp) | |
1360 | tz->polling_frequency = tzp; | |
1361 | else | |
1362 | acpi_thermal_get_polling_frequency(tz); | |
1363 | ||
d550d98d | 1364 | return 0; |
1da177e4 LT |
1365 | } |
1366 | ||
13614e37 JD |
1367 | /* |
1368 | * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI | |
1369 | * handles temperature values with a single decimal place. As a consequence, | |
1370 | * some implementations use an offset of 273.1 and others use an offset of | |
1371 | * 273.2. Try to find out which one is being used, to present the most | |
1372 | * accurate and visually appealing number. | |
1373 | * | |
1374 | * The heuristic below should work for all ACPI thermal zones which have a | |
1375 | * critical trip point with a value being a multiple of 0.5 degree Celsius. | |
1376 | */ | |
1377 | static void acpi_thermal_guess_offset(struct acpi_thermal *tz) | |
1378 | { | |
1379 | if (tz->trips.critical.flags.valid && | |
1380 | (tz->trips.critical.temperature % 5) == 1) | |
1381 | tz->kelvin_offset = 2731; | |
1382 | else | |
1383 | tz->kelvin_offset = 2732; | |
1384 | } | |
1385 | ||
4be44fcd | 1386 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1387 | { |
4be44fcd | 1388 | int result = 0; |
4be44fcd | 1389 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1390 | |
1da177e4 LT |
1391 | |
1392 | if (!device) | |
d550d98d | 1393 | return -EINVAL; |
1da177e4 | 1394 | |
36bcbec7 | 1395 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1396 | if (!tz) |
d550d98d | 1397 | return -ENOMEM; |
1da177e4 | 1398 | |
8348e1b1 | 1399 | tz->device = device; |
1da177e4 LT |
1400 | strcpy(tz->name, device->pnp.bus_id); |
1401 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1402 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
db89b4f0 | 1403 | device->driver_data = tz; |
6e215785 | 1404 | mutex_init(&tz->lock); |
3f655ef8 ZR |
1405 | |
1406 | ||
1da177e4 LT |
1407 | result = acpi_thermal_get_info(tz); |
1408 | if (result) | |
3f655ef8 ZR |
1409 | goto free_memory; |
1410 | ||
13614e37 JD |
1411 | acpi_thermal_guess_offset(tz); |
1412 | ||
3f655ef8 ZR |
1413 | result = acpi_thermal_register_thermal_zone(tz); |
1414 | if (result) | |
1415 | goto free_memory; | |
1da177e4 LT |
1416 | |
1417 | result = acpi_thermal_add_fs(device); | |
1418 | if (result) | |
3f655ef8 | 1419 | goto unregister_thermal_zone; |
1da177e4 | 1420 | |
1da177e4 | 1421 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", |
4be44fcd LB |
1422 | acpi_device_name(device), acpi_device_bid(device), |
1423 | KELVIN_TO_CELSIUS(tz->temperature)); | |
3f655ef8 | 1424 | goto end; |
1da177e4 | 1425 | |
3f655ef8 ZR |
1426 | unregister_thermal_zone: |
1427 | thermal_zone_device_unregister(tz->thermal_zone); | |
1428 | free_memory: | |
1429 | kfree(tz); | |
1430 | end: | |
d550d98d | 1431 | return result; |
1da177e4 LT |
1432 | } |
1433 | ||
4be44fcd | 1434 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1435 | { |
4be44fcd | 1436 | struct acpi_thermal *tz = NULL; |
1da177e4 | 1437 | |
1da177e4 | 1438 | if (!device || !acpi_driver_data(device)) |
d550d98d | 1439 | return -EINVAL; |
1da177e4 | 1440 | |
50dd0969 | 1441 | tz = acpi_driver_data(device); |
1da177e4 | 1442 | |
1da177e4 | 1443 | acpi_thermal_remove_fs(device); |
3f655ef8 | 1444 | acpi_thermal_unregister_thermal_zone(tz); |
6e215785 | 1445 | mutex_destroy(&tz->lock); |
1da177e4 | 1446 | kfree(tz); |
d550d98d | 1447 | return 0; |
1da177e4 LT |
1448 | } |
1449 | ||
5d9464a4 | 1450 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1451 | { |
1452 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1453 | int i, j, power_state, result; |
1454 | ||
74ce1468 KK |
1455 | |
1456 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1457 | return -EINVAL; |
74ce1468 | 1458 | |
50dd0969 | 1459 | tz = acpi_driver_data(device); |
74ce1468 | 1460 | |
bed936f7 | 1461 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1462 | if (!(&tz->trips.active[i])) |
1463 | break; | |
1464 | if (!tz->trips.active[i].flags.valid) | |
1465 | break; | |
1466 | tz->trips.active[i].flags.enabled = 1; | |
1467 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1468 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1469 | handles[j], &power_state); | |
1470 | if (result || (power_state != ACPI_STATE_D0)) { | |
1471 | tz->trips.active[i].flags.enabled = 0; | |
1472 | break; | |
1473 | } | |
bed936f7 | 1474 | } |
b1028c54 | 1475 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1476 | } |
1477 | ||
b1028c54 | 1478 | acpi_thermal_check(tz); |
74ce1468 KK |
1479 | |
1480 | return AE_OK; | |
1481 | } | |
1482 | ||
1855256c | 1483 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1484 | |
1485 | if (act == 0) { | |
1486 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1487 | "disabling all active thermal trip points\n", d->ident); | |
1488 | act = -1; | |
1489 | } | |
1490 | return 0; | |
1491 | } | |
1855256c | 1492 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1493 | |
1494 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1495 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1496 | nocrt = 1; | |
1497 | return 0; | |
1498 | } | |
1855256c | 1499 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1500 | |
1501 | if (tzp == 0) { | |
1502 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1503 | "enabling thermal zone polling\n", d->ident); | |
1504 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1505 | } | |
1506 | return 0; | |
1507 | } | |
1855256c | 1508 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1509 | |
1510 | if (psv == 0) { | |
1511 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1512 | "disabling all passive thermal trip points\n", d->ident); | |
1513 | psv = -1; | |
1514 | } | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1519 | /* | |
1520 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1521 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1522 | */ | |
1523 | { | |
1524 | .callback = thermal_act, | |
1525 | .ident = "AOpen i915GMm-HFS", | |
1526 | .matches = { | |
1527 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1528 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1529 | }, | |
1530 | }, | |
1531 | { | |
1532 | .callback = thermal_psv, | |
1533 | .ident = "AOpen i915GMm-HFS", | |
1534 | .matches = { | |
1535 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1536 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1537 | }, | |
1538 | }, | |
1539 | { | |
1540 | .callback = thermal_tzp, | |
1541 | .ident = "AOpen i915GMm-HFS", | |
1542 | .matches = { | |
1543 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1544 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1545 | }, | |
1546 | }, | |
8c99fdce LB |
1547 | { |
1548 | .callback = thermal_nocrt, | |
1549 | .ident = "Gigabyte GA-7ZX", | |
1550 | .matches = { | |
1551 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1552 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1553 | }, | |
1554 | }, | |
0b5bfa1c LB |
1555 | {} |
1556 | }; | |
0b5bfa1c | 1557 | |
4be44fcd | 1558 | static int __init acpi_thermal_init(void) |
1da177e4 | 1559 | { |
4be44fcd | 1560 | int result = 0; |
1da177e4 | 1561 | |
0b5bfa1c LB |
1562 | dmi_check_system(thermal_dmi_table); |
1563 | ||
72b33ef8 LB |
1564 | if (off) { |
1565 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1566 | return -ENODEV; | |
1567 | } | |
1da177e4 LT |
1568 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1569 | if (!acpi_thermal_dir) | |
d550d98d | 1570 | return -ENODEV; |
1da177e4 LT |
1571 | |
1572 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1573 | if (result < 0) { | |
1574 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1575 | return -ENODEV; |
1da177e4 LT |
1576 | } |
1577 | ||
d550d98d | 1578 | return 0; |
1da177e4 LT |
1579 | } |
1580 | ||
4be44fcd | 1581 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1582 | { |
1da177e4 LT |
1583 | |
1584 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1585 | ||
1586 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1587 | ||
d550d98d | 1588 | return; |
1da177e4 LT |
1589 | } |
1590 | ||
1da177e4 LT |
1591 | module_init(acpi_thermal_init); |
1592 | module_exit(acpi_thermal_exit); |