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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 LT |
45 | #include <asm/uaccess.h> |
46 | ||
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); | |
80 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n"); | |
81 | ||
1da177e4 | 82 | static int tzp; |
730ff34d | 83 | module_param(tzp, int, 0444); |
1da177e4 LT |
84 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); |
85 | ||
f5487145 LB |
86 | static int nocrt; |
87 | module_param(nocrt, int, 0); | |
88 | MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n"); | |
89 | ||
72b33ef8 LB |
90 | static int off; |
91 | module_param(off, int, 0); | |
92 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n"); | |
93 | ||
a70cdc52 LB |
94 | static int psv; |
95 | module_param(psv, int, 0644); | |
96 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n"); | |
97 | ||
4be44fcd LB |
98 | static int acpi_thermal_add(struct acpi_device *device); |
99 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 100 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
101 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
102 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
103 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 104 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
105 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
106 | const char __user *, size_t, | |
107 | loff_t *); | |
1da177e4 | 108 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
109 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
110 | size_t, loff_t *); | |
1da177e4 | 111 | |
1ba90e3a TR |
112 | static const struct acpi_device_id thermal_device_ids[] = { |
113 | {ACPI_THERMAL_HID, 0}, | |
114 | {"", 0}, | |
115 | }; | |
116 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
117 | ||
1da177e4 | 118 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 119 | .name = "thermal", |
4be44fcd | 120 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 121 | .ids = thermal_device_ids, |
4be44fcd LB |
122 | .ops = { |
123 | .add = acpi_thermal_add, | |
124 | .remove = acpi_thermal_remove, | |
74ce1468 | 125 | .resume = acpi_thermal_resume, |
4be44fcd | 126 | }, |
1da177e4 LT |
127 | }; |
128 | ||
129 | struct acpi_thermal_state { | |
4be44fcd LB |
130 | u8 critical:1; |
131 | u8 hot:1; | |
132 | u8 passive:1; | |
133 | u8 active:1; | |
134 | u8 reserved:4; | |
135 | int active_index; | |
1da177e4 LT |
136 | }; |
137 | ||
138 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
139 | u8 valid:1; |
140 | u8 enabled:1; | |
141 | u8 reserved:6; | |
1da177e4 LT |
142 | }; |
143 | ||
144 | struct acpi_thermal_critical { | |
145 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 146 | unsigned long temperature; |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_thermal_hot { | |
150 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 151 | unsigned long temperature; |
1da177e4 LT |
152 | }; |
153 | ||
154 | struct acpi_thermal_passive { | |
155 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
156 | unsigned long temperature; |
157 | unsigned long tc1; | |
158 | unsigned long tc2; | |
159 | unsigned long tsp; | |
160 | struct acpi_handle_list devices; | |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_thermal_active { | |
164 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
165 | unsigned long temperature; |
166 | struct acpi_handle_list devices; | |
1da177e4 LT |
167 | }; |
168 | ||
169 | struct acpi_thermal_trips { | |
170 | struct acpi_thermal_critical critical; | |
4be44fcd | 171 | struct acpi_thermal_hot hot; |
1da177e4 LT |
172 | struct acpi_thermal_passive passive; |
173 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
174 | }; | |
175 | ||
176 | struct acpi_thermal_flags { | |
4be44fcd LB |
177 | u8 cooling_mode:1; /* _SCP */ |
178 | u8 devices:1; /* _TZD */ | |
179 | u8 reserved:6; | |
1da177e4 LT |
180 | }; |
181 | ||
182 | struct acpi_thermal { | |
8348e1b1 | 183 | struct acpi_device * device; |
4be44fcd LB |
184 | acpi_bus_id name; |
185 | unsigned long temperature; | |
186 | unsigned long last_temperature; | |
187 | unsigned long polling_frequency; | |
4be44fcd | 188 | volatile u8 zombie; |
1da177e4 LT |
189 | struct acpi_thermal_flags flags; |
190 | struct acpi_thermal_state state; | |
191 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
192 | struct acpi_handle_list devices; |
193 | struct timer_list timer; | |
1da177e4 LT |
194 | }; |
195 | ||
d7508032 | 196 | static const struct file_operations acpi_thermal_state_fops = { |
4be44fcd LB |
197 | .open = acpi_thermal_state_open_fs, |
198 | .read = seq_read, | |
199 | .llseek = seq_lseek, | |
200 | .release = single_release, | |
1da177e4 LT |
201 | }; |
202 | ||
d7508032 | 203 | static const struct file_operations acpi_thermal_temp_fops = { |
4be44fcd LB |
204 | .open = acpi_thermal_temp_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_trip_fops = { |
4be44fcd LB |
211 | .open = acpi_thermal_trip_open_fs, |
212 | .read = seq_read, | |
4be44fcd LB |
213 | .llseek = seq_lseek, |
214 | .release = single_release, | |
1da177e4 LT |
215 | }; |
216 | ||
d7508032 | 217 | static const struct file_operations acpi_thermal_cooling_fops = { |
4be44fcd LB |
218 | .open = acpi_thermal_cooling_open_fs, |
219 | .read = seq_read, | |
220 | .write = acpi_thermal_write_cooling_mode, | |
221 | .llseek = seq_lseek, | |
222 | .release = single_release, | |
1da177e4 LT |
223 | }; |
224 | ||
d7508032 | 225 | static const struct file_operations acpi_thermal_polling_fops = { |
4be44fcd LB |
226 | .open = acpi_thermal_polling_open_fs, |
227 | .read = seq_read, | |
228 | .write = acpi_thermal_write_polling, | |
229 | .llseek = seq_lseek, | |
230 | .release = single_release, | |
1da177e4 LT |
231 | }; |
232 | ||
233 | /* -------------------------------------------------------------------------- | |
234 | Thermal Zone Management | |
235 | -------------------------------------------------------------------------- */ | |
236 | ||
4be44fcd | 237 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 238 | { |
4be44fcd | 239 | acpi_status status = AE_OK; |
1da177e4 | 240 | |
1da177e4 LT |
241 | |
242 | if (!tz) | |
d550d98d | 243 | return -EINVAL; |
1da177e4 LT |
244 | |
245 | tz->last_temperature = tz->temperature; | |
246 | ||
4be44fcd | 247 | status = |
38ba7c9e | 248 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 249 | if (ACPI_FAILURE(status)) |
d550d98d | 250 | return -ENODEV; |
1da177e4 | 251 | |
4be44fcd LB |
252 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
253 | tz->temperature)); | |
1da177e4 | 254 | |
d550d98d | 255 | return 0; |
1da177e4 LT |
256 | } |
257 | ||
4be44fcd | 258 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 259 | { |
4be44fcd | 260 | acpi_status status = AE_OK; |
1da177e4 | 261 | |
1da177e4 LT |
262 | |
263 | if (!tz) | |
d550d98d | 264 | return -EINVAL; |
1da177e4 | 265 | |
4be44fcd | 266 | status = |
38ba7c9e | 267 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 268 | &tz->polling_frequency); |
1da177e4 | 269 | if (ACPI_FAILURE(status)) |
d550d98d | 270 | return -ENODEV; |
1da177e4 | 271 | |
4be44fcd LB |
272 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
273 | tz->polling_frequency)); | |
1da177e4 | 274 | |
d550d98d | 275 | return 0; |
1da177e4 LT |
276 | } |
277 | ||
4be44fcd | 278 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 279 | { |
1da177e4 LT |
280 | |
281 | if (!tz) | |
d550d98d | 282 | return -EINVAL; |
1da177e4 LT |
283 | |
284 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
285 | ||
4be44fcd LB |
286 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
287 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 288 | tz->polling_frequency/10)); |
1da177e4 | 289 | |
d550d98d | 290 | return 0; |
1da177e4 LT |
291 | } |
292 | ||
4be44fcd | 293 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 294 | { |
4be44fcd LB |
295 | acpi_status status = AE_OK; |
296 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
297 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
298 | acpi_handle handle = NULL; | |
1da177e4 | 299 | |
1da177e4 LT |
300 | |
301 | if (!tz) | |
d550d98d | 302 | return -EINVAL; |
1da177e4 | 303 | |
38ba7c9e | 304 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
305 | if (ACPI_FAILURE(status)) { |
306 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 307 | return -ENODEV; |
1da177e4 LT |
308 | } |
309 | ||
310 | arg0.integer.value = mode; | |
311 | ||
312 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
313 | if (ACPI_FAILURE(status)) | |
d550d98d | 314 | return -ENODEV; |
1da177e4 | 315 | |
d550d98d | 316 | return 0; |
1da177e4 LT |
317 | } |
318 | ||
4be44fcd | 319 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 320 | { |
4be44fcd LB |
321 | acpi_status status = AE_OK; |
322 | int i = 0; | |
1da177e4 | 323 | |
1da177e4 LT |
324 | |
325 | if (!tz) | |
d550d98d | 326 | return -EINVAL; |
1da177e4 LT |
327 | |
328 | /* Critical Shutdown (required) */ | |
329 | ||
38ba7c9e | 330 | status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, |
4be44fcd | 331 | &tz->trips.critical.temperature); |
1da177e4 LT |
332 | if (ACPI_FAILURE(status)) { |
333 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 334 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 335 | return -ENODEV; |
4be44fcd | 336 | } else { |
1da177e4 | 337 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
338 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
339 | "Found critical threshold [%lu]\n", | |
340 | tz->trips.critical.temperature)); | |
1da177e4 LT |
341 | } |
342 | ||
343 | /* Critical Sleep (optional) */ | |
344 | ||
4be44fcd | 345 | status = |
38ba7c9e | 346 | acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, |
4be44fcd | 347 | &tz->trips.hot.temperature); |
1da177e4 LT |
348 | if (ACPI_FAILURE(status)) { |
349 | tz->trips.hot.flags.valid = 0; | |
350 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 351 | } else { |
1da177e4 | 352 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
353 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
354 | tz->trips.hot.temperature)); | |
1da177e4 LT |
355 | } |
356 | ||
357 | /* Passive: Processors (optional) */ | |
358 | ||
a70cdc52 LB |
359 | if (psv == -1) { |
360 | status = AE_SUPPORT; | |
361 | } else if (psv > 0) { | |
362 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
363 | status = AE_OK; | |
364 | } else { | |
365 | status = acpi_evaluate_integer(tz->device->handle, | |
366 | "_PSV", NULL, &tz->trips.passive.temperature); | |
367 | } | |
368 | ||
1da177e4 LT |
369 | if (ACPI_FAILURE(status)) { |
370 | tz->trips.passive.flags.valid = 0; | |
371 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 372 | } else { |
1da177e4 LT |
373 | tz->trips.passive.flags.valid = 1; |
374 | ||
4be44fcd | 375 | status = |
38ba7c9e | 376 | acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, |
4be44fcd | 377 | &tz->trips.passive.tc1); |
1da177e4 LT |
378 | if (ACPI_FAILURE(status)) |
379 | tz->trips.passive.flags.valid = 0; | |
380 | ||
4be44fcd | 381 | status = |
38ba7c9e | 382 | acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, |
4be44fcd | 383 | &tz->trips.passive.tc2); |
1da177e4 LT |
384 | if (ACPI_FAILURE(status)) |
385 | tz->trips.passive.flags.valid = 0; | |
386 | ||
4be44fcd | 387 | status = |
38ba7c9e | 388 | acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, |
4be44fcd | 389 | &tz->trips.passive.tsp); |
1da177e4 LT |
390 | if (ACPI_FAILURE(status)) |
391 | tz->trips.passive.flags.valid = 0; | |
392 | ||
4be44fcd | 393 | status = |
38ba7c9e | 394 | acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, |
4be44fcd | 395 | &tz->trips.passive.devices); |
1da177e4 LT |
396 | if (ACPI_FAILURE(status)) |
397 | tz->trips.passive.flags.valid = 0; | |
398 | ||
399 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 400 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 401 | else |
4be44fcd LB |
402 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
403 | "Found passive threshold [%lu]\n", | |
404 | tz->trips.passive.temperature)); | |
1da177e4 LT |
405 | } |
406 | ||
407 | /* Active: Fans, etc. (optional) */ | |
408 | ||
4be44fcd | 409 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 410 | |
4be44fcd | 411 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 412 | |
f8707ec9 LB |
413 | if (act == -1) |
414 | break; /* disable all active trip points */ | |
415 | ||
416 | status = acpi_evaluate_integer(tz->device->handle, | |
417 | name, NULL, &tz->trips.active[i].temperature); | |
418 | ||
419 | if (ACPI_FAILURE(status)) { | |
420 | if (i == 0) /* no active trip points */ | |
421 | break; | |
422 | if (act <= 0) /* no override requested */ | |
423 | break; | |
424 | if (i == 1) { /* 1 trip point */ | |
425 | tz->trips.active[0].temperature = | |
426 | CELSIUS_TO_KELVIN(act); | |
427 | } else { /* multiple trips */ | |
428 | /* | |
429 | * Don't allow override higher than | |
430 | * the next higher trip point | |
431 | */ | |
432 | tz->trips.active[i - 1].temperature = | |
433 | (tz->trips.active[i - 2].temperature < | |
434 | CELSIUS_TO_KELVIN(act) ? | |
435 | tz->trips.active[i - 2].temperature : | |
436 | CELSIUS_TO_KELVIN(act)); | |
437 | } | |
1da177e4 | 438 | break; |
f8707ec9 | 439 | } |
1da177e4 LT |
440 | |
441 | name[2] = 'L'; | |
4be44fcd | 442 | status = |
38ba7c9e | 443 | acpi_evaluate_reference(tz->device->handle, name, NULL, |
4be44fcd | 444 | &tz->trips.active[i].devices); |
1da177e4 LT |
445 | if (ACPI_SUCCESS(status)) { |
446 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
447 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
448 | "Found active threshold [%d]:[%lu]\n", | |
449 | i, tz->trips.active[i].temperature)); | |
450 | } else | |
a6fc6720 TR |
451 | ACPI_EXCEPTION((AE_INFO, status, |
452 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
453 | } |
454 | ||
d550d98d | 455 | return 0; |
1da177e4 LT |
456 | } |
457 | ||
4be44fcd | 458 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 459 | { |
4be44fcd | 460 | acpi_status status = AE_OK; |
1da177e4 | 461 | |
1da177e4 LT |
462 | |
463 | if (!tz) | |
d550d98d | 464 | return -EINVAL; |
1da177e4 | 465 | |
4be44fcd | 466 | status = |
38ba7c9e | 467 | acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); |
1da177e4 | 468 | if (ACPI_FAILURE(status)) |
d550d98d | 469 | return -ENODEV; |
1da177e4 | 470 | |
d550d98d | 471 | return 0; |
1da177e4 LT |
472 | } |
473 | ||
4be44fcd | 474 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 475 | { |
f5487145 | 476 | if (!tz || !tz->trips.critical.flags.valid || nocrt) |
d550d98d | 477 | return -EINVAL; |
1da177e4 LT |
478 | |
479 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 480 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 481 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 482 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
483 | tz->trips.critical.flags.enabled = 0; |
484 | ||
4be44fcd LB |
485 | printk(KERN_EMERG |
486 | "Critical temperature reached (%ld C), shutting down.\n", | |
487 | KELVIN_TO_CELSIUS(tz->temperature)); | |
8348e1b1 | 488 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 489 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
490 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
491 | tz->device->dev.bus_id, | |
492 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
493 | tz->trips.critical.flags.enabled); | |
1da177e4 | 494 | |
10a0a8d4 | 495 | orderly_poweroff(true); |
1da177e4 | 496 | |
d550d98d | 497 | return 0; |
1da177e4 LT |
498 | } |
499 | ||
4be44fcd | 500 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 501 | { |
f5487145 | 502 | if (!tz || !tz->trips.hot.flags.valid || nocrt) |
d550d98d | 503 | return -EINVAL; |
1da177e4 LT |
504 | |
505 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 506 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 507 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 508 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
509 | tz->trips.hot.flags.enabled = 0; |
510 | ||
8348e1b1 | 511 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 512 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
513 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
514 | tz->device->dev.bus_id, | |
515 | ACPI_THERMAL_NOTIFY_HOT, | |
516 | tz->trips.hot.flags.enabled); | |
1da177e4 LT |
517 | |
518 | /* TBD: Call user-mode "sleep(S4)" function */ | |
519 | ||
d550d98d | 520 | return 0; |
1da177e4 LT |
521 | } |
522 | ||
1cbf4c56 | 523 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 524 | { |
1cbf4c56 | 525 | int result = 1; |
1da177e4 | 526 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
527 | int trend = 0; |
528 | int i = 0; | |
1da177e4 | 529 | |
1da177e4 LT |
530 | |
531 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 532 | return; |
1da177e4 LT |
533 | |
534 | passive = &(tz->trips.passive); | |
535 | ||
536 | /* | |
537 | * Above Trip? | |
538 | * ----------- | |
539 | * Calculate the thermal trend (using the passive cooling equation) | |
540 | * and modify the performance limit for all passive cooling devices | |
541 | * accordingly. Note that we assume symmetry. | |
542 | */ | |
543 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
544 | trend = |
545 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
546 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
547 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
548 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
549 | trend, passive->tc1, tz->temperature, | |
550 | tz->last_temperature, passive->tc2, | |
551 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 552 | passive->flags.enabled = 1; |
1da177e4 LT |
553 | /* Heating up? */ |
554 | if (trend > 0) | |
4be44fcd LB |
555 | for (i = 0; i < passive->devices.count; i++) |
556 | acpi_processor_set_thermal_limit(passive-> | |
557 | devices. | |
558 | handles[i], | |
559 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 560 | /* Cooling off? */ |
1cbf4c56 | 561 | else if (trend < 0) { |
4be44fcd | 562 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
563 | /* |
564 | * assume that we are on highest | |
565 | * freq/lowest thrott and can leave | |
566 | * passive mode, even in error case | |
567 | */ | |
568 | if (!acpi_processor_set_thermal_limit | |
569 | (passive->devices.handles[i], | |
570 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
571 | result = 0; | |
572 | /* | |
573 | * Leave cooling mode, even if the temp might | |
574 | * higher than trip point This is because some | |
575 | * machines might have long thermal polling | |
576 | * frequencies (tsp) defined. We will fall back | |
577 | * into passive mode in next cycle (probably quicker) | |
578 | */ | |
579 | if (result) { | |
580 | passive->flags.enabled = 0; | |
581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
582 | "Disabling passive cooling, still above threshold," | |
583 | " but we are cooling down\n")); | |
584 | } | |
585 | } | |
586 | return; | |
1da177e4 LT |
587 | } |
588 | ||
589 | /* | |
590 | * Below Trip? | |
591 | * ----------- | |
592 | * Implement passive cooling hysteresis to slowly increase performance | |
593 | * and avoid thrashing around the passive trip point. Note that we | |
594 | * assume symmetry. | |
595 | */ | |
1cbf4c56 TR |
596 | if (!passive->flags.enabled) |
597 | return; | |
598 | for (i = 0; i < passive->devices.count; i++) | |
599 | if (!acpi_processor_set_thermal_limit | |
600 | (passive->devices.handles[i], | |
601 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
602 | result = 0; | |
603 | if (result) { | |
604 | passive->flags.enabled = 0; | |
605 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
606 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 607 | } |
1da177e4 LT |
608 | } |
609 | ||
1cbf4c56 | 610 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 611 | { |
4be44fcd | 612 | int result = 0; |
1da177e4 | 613 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
614 | int i = 0; |
615 | int j = 0; | |
616 | unsigned long maxtemp = 0; | |
1da177e4 | 617 | |
1da177e4 LT |
618 | |
619 | if (!tz) | |
1cbf4c56 | 620 | return; |
1da177e4 | 621 | |
4be44fcd | 622 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
623 | active = &(tz->trips.active[i]); |
624 | if (!active || !active->flags.valid) | |
625 | break; | |
1da177e4 | 626 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
627 | /* |
628 | * Above Threshold? | |
629 | * ---------------- | |
630 | * If not already enabled, turn ON all cooling devices | |
631 | * associated with this active threshold. | |
632 | */ | |
1da177e4 | 633 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
634 | tz->state.active_index = i; |
635 | maxtemp = active->temperature; | |
636 | if (active->flags.enabled) | |
637 | continue; | |
1da177e4 | 638 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
639 | result = |
640 | acpi_bus_set_power(active->devices. | |
641 | handles[j], | |
1cbf4c56 | 642 | ACPI_STATE_D0); |
1da177e4 | 643 | if (result) { |
cece9296 LB |
644 | printk(KERN_WARNING PREFIX |
645 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 646 | active->devices. |
cece9296 | 647 | handles[j]); |
1da177e4 LT |
648 | continue; |
649 | } | |
1cbf4c56 | 650 | active->flags.enabled = 1; |
4be44fcd | 651 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 652 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 653 | active->devices.handles[j])); |
1da177e4 | 654 | } |
1cbf4c56 TR |
655 | continue; |
656 | } | |
657 | if (!active->flags.enabled) | |
658 | continue; | |
659 | /* | |
660 | * Below Threshold? | |
661 | * ---------------- | |
662 | * Turn OFF all cooling devices associated with this | |
663 | * threshold. | |
664 | */ | |
665 | for (j = 0; j < active->devices.count; j++) { | |
666 | result = acpi_bus_set_power(active->devices.handles[j], | |
667 | ACPI_STATE_D3); | |
668 | if (result) { | |
cece9296 LB |
669 | printk(KERN_WARNING PREFIX |
670 | "Unable to turn cooling device [%p] 'off'\n", | |
671 | active->devices.handles[j]); | |
1cbf4c56 TR |
672 | continue; |
673 | } | |
674 | active->flags.enabled = 0; | |
675 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
676 | "Cooling device [%p] now 'off'\n", | |
677 | active->devices.handles[j])); | |
1da177e4 LT |
678 | } |
679 | } | |
1da177e4 LT |
680 | } |
681 | ||
4be44fcd | 682 | static void acpi_thermal_check(void *context); |
1da177e4 | 683 | |
4be44fcd | 684 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
685 | { |
686 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
687 | if (!tz->zombie) | |
b8d35192 | 688 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
689 | } |
690 | ||
4be44fcd | 691 | static void acpi_thermal_check(void *data) |
1da177e4 | 692 | { |
4be44fcd | 693 | int result = 0; |
50dd0969 | 694 | struct acpi_thermal *tz = data; |
4be44fcd LB |
695 | unsigned long sleep_time = 0; |
696 | int i = 0; | |
1da177e4 LT |
697 | struct acpi_thermal_state state; |
698 | ||
1da177e4 LT |
699 | |
700 | if (!tz) { | |
6468463a | 701 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 702 | return; |
1da177e4 LT |
703 | } |
704 | ||
705 | state = tz->state; | |
706 | ||
707 | result = acpi_thermal_get_temperature(tz); | |
708 | if (result) | |
d550d98d | 709 | return; |
4be44fcd | 710 | |
1da177e4 | 711 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 712 | |
1da177e4 LT |
713 | /* |
714 | * Check Trip Points | |
715 | * ----------------- | |
716 | * Compare the current temperature to the trip point values to see | |
717 | * if we've entered one of the thermal policy states. Note that | |
718 | * this function determines when a state is entered, but the | |
719 | * individual policy decides when it is exited (e.g. hysteresis). | |
720 | */ | |
721 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
722 | state.critical |= |
723 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
724 | if (tz->trips.hot.flags.valid) |
725 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
726 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
727 | state.passive |= |
728 | (tz->temperature >= tz->trips.passive.temperature); | |
729 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 730 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
731 | state.active |= |
732 | (tz->temperature >= | |
733 | tz->trips.active[i].temperature); | |
1da177e4 LT |
734 | |
735 | /* | |
736 | * Invoke Policy | |
737 | * ------------- | |
738 | * Separated from the above check to allow individual policy to | |
739 | * determine when to exit a given state. | |
740 | */ | |
741 | if (state.critical) | |
742 | acpi_thermal_critical(tz); | |
743 | if (state.hot) | |
744 | acpi_thermal_hot(tz); | |
745 | if (state.passive) | |
746 | acpi_thermal_passive(tz); | |
747 | if (state.active) | |
748 | acpi_thermal_active(tz); | |
749 | ||
750 | /* | |
751 | * Calculate State | |
752 | * --------------- | |
753 | * Again, separated from the above two to allow independent policy | |
754 | * decisions. | |
755 | */ | |
1cbf4c56 TR |
756 | tz->state.critical = tz->trips.critical.flags.enabled; |
757 | tz->state.hot = tz->trips.hot.flags.enabled; | |
758 | tz->state.passive = tz->trips.passive.flags.enabled; | |
759 | tz->state.active = 0; | |
4be44fcd | 760 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 761 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
762 | |
763 | /* | |
764 | * Calculate Sleep Time | |
765 | * -------------------- | |
766 | * If we're in the passive state, use _TSP's value. Otherwise | |
767 | * use the default polling frequency (e.g. _TZP). If no polling | |
768 | * frequency is specified then we'll wait forever (at least until | |
769 | * a thermal event occurs). Note that _TSP and _TZD values are | |
770 | * given in 1/10th seconds (we must covert to milliseconds). | |
771 | */ | |
772 | if (tz->state.passive) | |
773 | sleep_time = tz->trips.passive.tsp * 100; | |
774 | else if (tz->polling_frequency > 0) | |
775 | sleep_time = tz->polling_frequency * 100; | |
776 | ||
4be44fcd LB |
777 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
778 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
779 | |
780 | /* | |
781 | * Schedule Next Poll | |
782 | * ------------------ | |
783 | */ | |
784 | if (!sleep_time) { | |
785 | if (timer_pending(&(tz->timer))) | |
786 | del_timer(&(tz->timer)); | |
4be44fcd | 787 | } else { |
1da177e4 | 788 | if (timer_pending(&(tz->timer))) |
94e22e13 AM |
789 | mod_timer(&(tz->timer), |
790 | jiffies + (HZ * sleep_time) / 1000); | |
1da177e4 | 791 | else { |
4be44fcd | 792 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
793 | tz->timer.function = acpi_thermal_run; |
794 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
795 | add_timer(&(tz->timer)); | |
796 | } | |
797 | } | |
798 | ||
d550d98d | 799 | return; |
1da177e4 LT |
800 | } |
801 | ||
1da177e4 LT |
802 | /* -------------------------------------------------------------------------- |
803 | FS Interface (/proc) | |
804 | -------------------------------------------------------------------------- */ | |
805 | ||
4be44fcd | 806 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
807 | |
808 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
809 | { | |
50dd0969 | 810 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 811 | |
1da177e4 LT |
812 | |
813 | if (!tz) | |
814 | goto end; | |
815 | ||
816 | seq_puts(seq, "state: "); | |
817 | ||
4be44fcd LB |
818 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
819 | && !tz->state.active) | |
1da177e4 LT |
820 | seq_puts(seq, "ok\n"); |
821 | else { | |
822 | if (tz->state.critical) | |
823 | seq_puts(seq, "critical "); | |
824 | if (tz->state.hot) | |
825 | seq_puts(seq, "hot "); | |
826 | if (tz->state.passive) | |
827 | seq_puts(seq, "passive "); | |
828 | if (tz->state.active) | |
829 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
830 | seq_puts(seq, "\n"); | |
831 | } | |
832 | ||
4be44fcd | 833 | end: |
d550d98d | 834 | return 0; |
1da177e4 LT |
835 | } |
836 | ||
837 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
838 | { | |
839 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
840 | } | |
841 | ||
1da177e4 LT |
842 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
843 | { | |
4be44fcd | 844 | int result = 0; |
50dd0969 | 845 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 846 | |
1da177e4 LT |
847 | |
848 | if (!tz) | |
849 | goto end; | |
850 | ||
851 | result = acpi_thermal_get_temperature(tz); | |
852 | if (result) | |
853 | goto end; | |
854 | ||
4be44fcd LB |
855 | seq_printf(seq, "temperature: %ld C\n", |
856 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 857 | |
4be44fcd | 858 | end: |
d550d98d | 859 | return 0; |
1da177e4 LT |
860 | } |
861 | ||
862 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
863 | { | |
864 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
865 | } | |
866 | ||
1da177e4 LT |
867 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
868 | { | |
50dd0969 | 869 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 870 | struct acpi_device *device; |
e7c746ef TR |
871 | acpi_status status; |
872 | ||
4be44fcd LB |
873 | int i = 0; |
874 | int j = 0; | |
1da177e4 | 875 | |
1da177e4 LT |
876 | |
877 | if (!tz) | |
878 | goto end; | |
879 | ||
880 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
881 | seq_printf(seq, "critical (S5): %ld C%s", |
882 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
883 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
884 | |
885 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
886 | seq_printf(seq, "hot (S4): %ld C%s", |
887 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
888 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
889 | |
890 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
891 | seq_printf(seq, |
892 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
893 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
894 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
895 | tz->trips.passive.tsp); | |
896 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
897 | status = acpi_bus_get_device(tz->trips.passive.devices. |
898 | handles[j], &device); | |
899 | seq_printf(seq, "%4.4s ", status ? "" : | |
900 | acpi_device_bid(device)); | |
1da177e4 LT |
901 | } |
902 | seq_puts(seq, "\n"); | |
903 | } | |
904 | ||
905 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
906 | if (!(tz->trips.active[i].flags.valid)) | |
907 | break; | |
908 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
909 | i, |
910 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 911 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
912 | status = acpi_bus_get_device(tz->trips.active[i]. |
913 | devices.handles[j], | |
914 | &device); | |
915 | seq_printf(seq, "%4.4s ", status ? "" : | |
916 | acpi_device_bid(device)); | |
68ccfaa8 | 917 | } |
1da177e4 LT |
918 | seq_puts(seq, "\n"); |
919 | } | |
920 | ||
4be44fcd | 921 | end: |
d550d98d | 922 | return 0; |
1da177e4 LT |
923 | } |
924 | ||
925 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
926 | { | |
927 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
928 | } | |
929 | ||
1da177e4 LT |
930 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
931 | { | |
50dd0969 | 932 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 933 | |
1da177e4 LT |
934 | |
935 | if (!tz) | |
936 | goto end; | |
937 | ||
eaca2d3f | 938 | if (!tz->flags.cooling_mode) |
1da177e4 | 939 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 940 | else |
eaca2d3f | 941 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 942 | |
4be44fcd | 943 | end: |
d550d98d | 944 | return 0; |
1da177e4 LT |
945 | } |
946 | ||
947 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
948 | { | |
949 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 950 | PDE(inode)->data); |
1da177e4 LT |
951 | } |
952 | ||
953 | static ssize_t | |
4be44fcd LB |
954 | acpi_thermal_write_cooling_mode(struct file *file, |
955 | const char __user * buffer, | |
956 | size_t count, loff_t * ppos) | |
1da177e4 | 957 | { |
50dd0969 JE |
958 | struct seq_file *m = file->private_data; |
959 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
960 | int result = 0; |
961 | char mode_string[12] = { '\0' }; | |
1da177e4 | 962 | |
1da177e4 LT |
963 | |
964 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 965 | return -EINVAL; |
1da177e4 LT |
966 | |
967 | if (!tz->flags.cooling_mode) | |
d550d98d | 968 | return -ENODEV; |
1da177e4 LT |
969 | |
970 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 971 | return -EFAULT; |
4be44fcd | 972 | |
1da177e4 | 973 | mode_string[count] = '\0'; |
4be44fcd LB |
974 | |
975 | result = acpi_thermal_set_cooling_mode(tz, | |
976 | simple_strtoul(mode_string, NULL, | |
977 | 0)); | |
1da177e4 | 978 | if (result) |
d550d98d | 979 | return result; |
1da177e4 LT |
980 | |
981 | acpi_thermal_check(tz); | |
982 | ||
d550d98d | 983 | return count; |
1da177e4 LT |
984 | } |
985 | ||
1da177e4 LT |
986 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
987 | { | |
50dd0969 | 988 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 989 | |
1da177e4 LT |
990 | |
991 | if (!tz) | |
992 | goto end; | |
993 | ||
994 | if (!tz->polling_frequency) { | |
995 | seq_puts(seq, "<polling disabled>\n"); | |
996 | goto end; | |
997 | } | |
998 | ||
999 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1000 | (tz->polling_frequency / 10)); |
1da177e4 | 1001 | |
4be44fcd | 1002 | end: |
d550d98d | 1003 | return 0; |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1007 | { | |
1008 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1009 | PDE(inode)->data); |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | static ssize_t | |
4be44fcd LB |
1013 | acpi_thermal_write_polling(struct file *file, |
1014 | const char __user * buffer, | |
1015 | size_t count, loff_t * ppos) | |
1da177e4 | 1016 | { |
50dd0969 JE |
1017 | struct seq_file *m = file->private_data; |
1018 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1019 | int result = 0; |
1020 | char polling_string[12] = { '\0' }; | |
1021 | int seconds = 0; | |
1da177e4 | 1022 | |
1da177e4 LT |
1023 | |
1024 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1025 | return -EINVAL; |
4be44fcd | 1026 | |
1da177e4 | 1027 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1028 | return -EFAULT; |
4be44fcd | 1029 | |
1da177e4 LT |
1030 | polling_string[count] = '\0'; |
1031 | ||
1032 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1033 | |
1da177e4 LT |
1034 | result = acpi_thermal_set_polling(tz, seconds); |
1035 | if (result) | |
d550d98d | 1036 | return result; |
1da177e4 LT |
1037 | |
1038 | acpi_thermal_check(tz); | |
1039 | ||
d550d98d | 1040 | return count; |
1da177e4 LT |
1041 | } |
1042 | ||
4be44fcd | 1043 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1044 | { |
4be44fcd | 1045 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1046 | |
1da177e4 LT |
1047 | |
1048 | if (!acpi_device_dir(device)) { | |
1049 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1050 | acpi_thermal_dir); |
1da177e4 | 1051 | if (!acpi_device_dir(device)) |
d550d98d | 1052 | return -ENODEV; |
1da177e4 LT |
1053 | acpi_device_dir(device)->owner = THIS_MODULE; |
1054 | } | |
1055 | ||
1056 | /* 'state' [R] */ | |
1057 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1058 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1059 | if (!entry) |
d550d98d | 1060 | return -ENODEV; |
1da177e4 LT |
1061 | else { |
1062 | entry->proc_fops = &acpi_thermal_state_fops; | |
1063 | entry->data = acpi_driver_data(device); | |
1064 | entry->owner = THIS_MODULE; | |
1065 | } | |
1066 | ||
1067 | /* 'temperature' [R] */ | |
1068 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1069 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1070 | if (!entry) |
d550d98d | 1071 | return -ENODEV; |
1da177e4 LT |
1072 | else { |
1073 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1074 | entry->data = acpi_driver_data(device); | |
1075 | entry->owner = THIS_MODULE; | |
1076 | } | |
1077 | ||
1078 | /* 'trip_points' [R/W] */ | |
1079 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1080 | S_IFREG | S_IRUGO | S_IWUSR, |
1081 | acpi_device_dir(device)); | |
1da177e4 | 1082 | if (!entry) |
d550d98d | 1083 | return -ENODEV; |
1da177e4 LT |
1084 | else { |
1085 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1086 | entry->data = acpi_driver_data(device); | |
1087 | entry->owner = THIS_MODULE; | |
1088 | } | |
1089 | ||
1090 | /* 'cooling_mode' [R/W] */ | |
1091 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1092 | S_IFREG | S_IRUGO | S_IWUSR, |
1093 | acpi_device_dir(device)); | |
1da177e4 | 1094 | if (!entry) |
d550d98d | 1095 | return -ENODEV; |
1da177e4 LT |
1096 | else { |
1097 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1098 | entry->data = acpi_driver_data(device); | |
1099 | entry->owner = THIS_MODULE; | |
1100 | } | |
1101 | ||
1102 | /* 'polling_frequency' [R/W] */ | |
1103 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1104 | S_IFREG | S_IRUGO | S_IWUSR, |
1105 | acpi_device_dir(device)); | |
1da177e4 | 1106 | if (!entry) |
d550d98d | 1107 | return -ENODEV; |
1da177e4 LT |
1108 | else { |
1109 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1110 | entry->data = acpi_driver_data(device); | |
1111 | entry->owner = THIS_MODULE; | |
1112 | } | |
1113 | ||
d550d98d | 1114 | return 0; |
1da177e4 LT |
1115 | } |
1116 | ||
4be44fcd | 1117 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1118 | { |
1da177e4 LT |
1119 | |
1120 | if (acpi_device_dir(device)) { | |
1121 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1122 | acpi_device_dir(device)); | |
1123 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1124 | acpi_device_dir(device)); | |
1125 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1126 | acpi_device_dir(device)); | |
1127 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1128 | acpi_device_dir(device)); | |
1129 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1130 | acpi_device_dir(device)); | |
1131 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1132 | acpi_device_dir(device) = NULL; | |
1133 | } | |
1134 | ||
d550d98d | 1135 | return 0; |
1da177e4 LT |
1136 | } |
1137 | ||
1da177e4 LT |
1138 | /* -------------------------------------------------------------------------- |
1139 | Driver Interface | |
1140 | -------------------------------------------------------------------------- */ | |
1141 | ||
4be44fcd | 1142 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1143 | { |
50dd0969 | 1144 | struct acpi_thermal *tz = data; |
4be44fcd | 1145 | struct acpi_device *device = NULL; |
1da177e4 | 1146 | |
1da177e4 LT |
1147 | |
1148 | if (!tz) | |
d550d98d | 1149 | return; |
1da177e4 | 1150 | |
8348e1b1 | 1151 | device = tz->device; |
1da177e4 LT |
1152 | |
1153 | switch (event) { | |
1154 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1155 | acpi_thermal_check(tz); | |
1156 | break; | |
1157 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1158 | acpi_thermal_get_trip_points(tz); | |
1159 | acpi_thermal_check(tz); | |
1160 | acpi_bus_generate_event(device, event, 0); | |
962ce8ca ZR |
1161 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1162 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1163 | break; |
1164 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1165 | if (tz->flags.devices) | |
1166 | acpi_thermal_get_devices(tz); | |
1167 | acpi_bus_generate_event(device, event, 0); | |
962ce8ca ZR |
1168 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1169 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1170 | break; |
1171 | default: | |
1172 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1173 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1174 | break; |
1175 | } | |
1176 | ||
d550d98d | 1177 | return; |
1da177e4 LT |
1178 | } |
1179 | ||
4be44fcd | 1180 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1181 | { |
4be44fcd | 1182 | int result = 0; |
1da177e4 | 1183 | |
1da177e4 LT |
1184 | |
1185 | if (!tz) | |
d550d98d | 1186 | return -EINVAL; |
1da177e4 LT |
1187 | |
1188 | /* Get temperature [_TMP] (required) */ | |
1189 | result = acpi_thermal_get_temperature(tz); | |
1190 | if (result) | |
d550d98d | 1191 | return result; |
1da177e4 LT |
1192 | |
1193 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1194 | result = acpi_thermal_get_trip_points(tz); | |
1195 | if (result) | |
d550d98d | 1196 | return result; |
1da177e4 LT |
1197 | |
1198 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1199 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1200 | if (!result) |
1da177e4 | 1201 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1202 | |
1203 | /* Get default polling frequency [_TZP] (optional) */ | |
1204 | if (tzp) | |
1205 | tz->polling_frequency = tzp; | |
1206 | else | |
1207 | acpi_thermal_get_polling_frequency(tz); | |
1208 | ||
1209 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1210 | result = acpi_thermal_get_devices(tz); | |
1211 | if (!result) | |
1212 | tz->flags.devices = 1; | |
1213 | ||
d550d98d | 1214 | return 0; |
1da177e4 LT |
1215 | } |
1216 | ||
4be44fcd | 1217 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1218 | { |
4be44fcd LB |
1219 | int result = 0; |
1220 | acpi_status status = AE_OK; | |
1221 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1222 | |
1da177e4 LT |
1223 | |
1224 | if (!device) | |
d550d98d | 1225 | return -EINVAL; |
1da177e4 | 1226 | |
36bcbec7 | 1227 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1228 | if (!tz) |
d550d98d | 1229 | return -ENOMEM; |
1da177e4 | 1230 | |
8348e1b1 | 1231 | tz->device = device; |
1da177e4 LT |
1232 | strcpy(tz->name, device->pnp.bus_id); |
1233 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1234 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1235 | acpi_driver_data(device) = tz; | |
1236 | ||
1237 | result = acpi_thermal_get_info(tz); | |
1238 | if (result) | |
1239 | goto end; | |
1240 | ||
1241 | result = acpi_thermal_add_fs(device); | |
1242 | if (result) | |
09047e75 | 1243 | goto end; |
1da177e4 LT |
1244 | |
1245 | init_timer(&tz->timer); | |
1246 | ||
1247 | acpi_thermal_check(tz); | |
1248 | ||
38ba7c9e | 1249 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1250 | ACPI_DEVICE_NOTIFY, |
1251 | acpi_thermal_notify, tz); | |
1da177e4 | 1252 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1253 | result = -ENODEV; |
1254 | goto end; | |
1255 | } | |
1256 | ||
1257 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1258 | acpi_device_name(device), acpi_device_bid(device), |
1259 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1260 | |
4be44fcd | 1261 | end: |
1da177e4 LT |
1262 | if (result) { |
1263 | acpi_thermal_remove_fs(device); | |
1264 | kfree(tz); | |
1265 | } | |
1266 | ||
d550d98d | 1267 | return result; |
1da177e4 LT |
1268 | } |
1269 | ||
4be44fcd | 1270 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1271 | { |
4be44fcd LB |
1272 | acpi_status status = AE_OK; |
1273 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1274 | |
1da177e4 LT |
1275 | |
1276 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1277 | return -EINVAL; |
1da177e4 | 1278 | |
50dd0969 | 1279 | tz = acpi_driver_data(device); |
1da177e4 LT |
1280 | |
1281 | /* avoid timer adding new defer task */ | |
1282 | tz->zombie = 1; | |
1283 | /* wait for running timer (on other CPUs) finish */ | |
1284 | del_timer_sync(&(tz->timer)); | |
1285 | /* synchronize deferred task */ | |
1286 | acpi_os_wait_events_complete(NULL); | |
1287 | /* deferred task may reinsert timer */ | |
1288 | del_timer_sync(&(tz->timer)); | |
1289 | ||
38ba7c9e | 1290 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1291 | ACPI_DEVICE_NOTIFY, |
1292 | acpi_thermal_notify); | |
1da177e4 LT |
1293 | |
1294 | /* Terminate policy */ | |
4be44fcd | 1295 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1296 | tz->trips.passive.flags.enabled = 0; |
1297 | acpi_thermal_passive(tz); | |
1298 | } | |
1299 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1300 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1301 | tz->trips.active[0].flags.enabled = 0; |
1302 | acpi_thermal_active(tz); | |
1303 | } | |
1304 | ||
1305 | acpi_thermal_remove_fs(device); | |
1306 | ||
1307 | kfree(tz); | |
d550d98d | 1308 | return 0; |
1da177e4 LT |
1309 | } |
1310 | ||
5d9464a4 | 1311 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1312 | { |
1313 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1314 | int i, j, power_state, result; |
1315 | ||
74ce1468 KK |
1316 | |
1317 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1318 | return -EINVAL; |
74ce1468 | 1319 | |
50dd0969 | 1320 | tz = acpi_driver_data(device); |
74ce1468 | 1321 | |
bed936f7 | 1322 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1323 | if (!(&tz->trips.active[i])) |
1324 | break; | |
1325 | if (!tz->trips.active[i].flags.valid) | |
1326 | break; | |
1327 | tz->trips.active[i].flags.enabled = 1; | |
1328 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1329 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1330 | handles[j], &power_state); | |
1331 | if (result || (power_state != ACPI_STATE_D0)) { | |
1332 | tz->trips.active[i].flags.enabled = 0; | |
1333 | break; | |
1334 | } | |
bed936f7 | 1335 | } |
b1028c54 | 1336 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1337 | } |
1338 | ||
b1028c54 | 1339 | acpi_thermal_check(tz); |
74ce1468 KK |
1340 | |
1341 | return AE_OK; | |
1342 | } | |
1343 | ||
0b5bfa1c LB |
1344 | #ifdef CONFIG_DMI |
1345 | static int thermal_act(struct dmi_system_id *d) { | |
1346 | ||
1347 | if (act == 0) { | |
1348 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1349 | "disabling all active thermal trip points\n", d->ident); | |
1350 | act = -1; | |
1351 | } | |
1352 | return 0; | |
1353 | } | |
1354 | static int thermal_tzp(struct dmi_system_id *d) { | |
1355 | ||
1356 | if (tzp == 0) { | |
1357 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1358 | "enabling thermal zone polling\n", d->ident); | |
1359 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1360 | } | |
1361 | return 0; | |
1362 | } | |
1363 | static int thermal_psv(struct dmi_system_id *d) { | |
1364 | ||
1365 | if (psv == 0) { | |
1366 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1367 | "disabling all passive thermal trip points\n", d->ident); | |
1368 | psv = -1; | |
1369 | } | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1374 | /* | |
1375 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1376 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1377 | */ | |
1378 | { | |
1379 | .callback = thermal_act, | |
1380 | .ident = "AOpen i915GMm-HFS", | |
1381 | .matches = { | |
1382 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1383 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1384 | }, | |
1385 | }, | |
1386 | { | |
1387 | .callback = thermal_psv, | |
1388 | .ident = "AOpen i915GMm-HFS", | |
1389 | .matches = { | |
1390 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1391 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1392 | }, | |
1393 | }, | |
1394 | { | |
1395 | .callback = thermal_tzp, | |
1396 | .ident = "AOpen i915GMm-HFS", | |
1397 | .matches = { | |
1398 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1399 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1400 | }, | |
1401 | }, | |
1402 | {} | |
1403 | }; | |
1404 | #endif /* CONFIG_DMI */ | |
1405 | ||
4be44fcd | 1406 | static int __init acpi_thermal_init(void) |
1da177e4 | 1407 | { |
4be44fcd | 1408 | int result = 0; |
1da177e4 | 1409 | |
0b5bfa1c LB |
1410 | dmi_check_system(thermal_dmi_table); |
1411 | ||
72b33ef8 LB |
1412 | if (off) { |
1413 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1414 | return -ENODEV; | |
1415 | } | |
1da177e4 LT |
1416 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1417 | if (!acpi_thermal_dir) | |
d550d98d | 1418 | return -ENODEV; |
1da177e4 LT |
1419 | acpi_thermal_dir->owner = THIS_MODULE; |
1420 | ||
1421 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1422 | if (result < 0) { | |
1423 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1424 | return -ENODEV; |
1da177e4 LT |
1425 | } |
1426 | ||
d550d98d | 1427 | return 0; |
1da177e4 LT |
1428 | } |
1429 | ||
4be44fcd | 1430 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1431 | { |
1da177e4 LT |
1432 | |
1433 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1434 | ||
1435 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1436 | ||
d550d98d | 1437 | return; |
1da177e4 LT |
1438 | } |
1439 | ||
1da177e4 LT |
1440 | module_init(acpi_thermal_init); |
1441 | module_exit(acpi_thermal_exit); |