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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> | |
36 | #include <linux/init.h> | |
37 | #include <linux/types.h> | |
38 | #include <linux/proc_fs.h> | |
cd354f1a TS |
39 | #include <linux/timer.h> |
40 | #include <linux/jiffies.h> | |
1da177e4 LT |
41 | #include <linux/kmod.h> |
42 | #include <linux/seq_file.h> | |
10a0a8d4 | 43 | #include <linux/reboot.h> |
1da177e4 LT |
44 | #include <asm/uaccess.h> |
45 | ||
46 | #include <acpi/acpi_bus.h> | |
47 | #include <acpi/acpi_drivers.h> | |
48 | ||
49 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
50 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
1da177e4 LT |
51 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
52 | #define ACPI_THERMAL_FILE_STATE "state" | |
53 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
54 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
55 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
56 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
57 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
58 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
59 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
60 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
61 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
62 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
63 | |
64 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
65 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
66 | ||
67 | #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) | |
68 | #define CELSIUS_TO_KELVIN(t) ((t+273)*10) | |
69 | ||
70 | #define _COMPONENT ACPI_THERMAL_COMPONENT | |
f52fd66d | 71 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 72 | |
1cbf4c56 | 73 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 74 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
75 | MODULE_LICENSE("GPL"); |
76 | ||
77 | static int tzp; | |
730ff34d | 78 | module_param(tzp, int, 0444); |
1da177e4 LT |
79 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); |
80 | ||
f5487145 LB |
81 | static int nocrt; |
82 | module_param(nocrt, int, 0); | |
83 | MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n"); | |
84 | ||
72b33ef8 LB |
85 | static int off; |
86 | module_param(off, int, 0); | |
87 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n"); | |
88 | ||
a70cdc52 LB |
89 | static int psv; |
90 | module_param(psv, int, 0644); | |
91 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n"); | |
92 | ||
4be44fcd LB |
93 | static int acpi_thermal_add(struct acpi_device *device); |
94 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 95 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
96 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
97 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
98 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 99 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
100 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
101 | const char __user *, size_t, | |
102 | loff_t *); | |
1da177e4 | 103 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
104 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
105 | size_t, loff_t *); | |
1da177e4 | 106 | |
1ba90e3a TR |
107 | static const struct acpi_device_id thermal_device_ids[] = { |
108 | {ACPI_THERMAL_HID, 0}, | |
109 | {"", 0}, | |
110 | }; | |
111 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
112 | ||
1da177e4 | 113 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 114 | .name = "thermal", |
4be44fcd | 115 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 116 | .ids = thermal_device_ids, |
4be44fcd LB |
117 | .ops = { |
118 | .add = acpi_thermal_add, | |
119 | .remove = acpi_thermal_remove, | |
74ce1468 | 120 | .resume = acpi_thermal_resume, |
4be44fcd | 121 | }, |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct acpi_thermal_state { | |
4be44fcd LB |
125 | u8 critical:1; |
126 | u8 hot:1; | |
127 | u8 passive:1; | |
128 | u8 active:1; | |
129 | u8 reserved:4; | |
130 | int active_index; | |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
134 | u8 valid:1; |
135 | u8 enabled:1; | |
136 | u8 reserved:6; | |
1da177e4 LT |
137 | }; |
138 | ||
139 | struct acpi_thermal_critical { | |
140 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 141 | unsigned long temperature; |
1da177e4 LT |
142 | }; |
143 | ||
144 | struct acpi_thermal_hot { | |
145 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 146 | unsigned long temperature; |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_thermal_passive { | |
150 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
151 | unsigned long temperature; |
152 | unsigned long tc1; | |
153 | unsigned long tc2; | |
154 | unsigned long tsp; | |
155 | struct acpi_handle_list devices; | |
1da177e4 LT |
156 | }; |
157 | ||
158 | struct acpi_thermal_active { | |
159 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
160 | unsigned long temperature; |
161 | struct acpi_handle_list devices; | |
1da177e4 LT |
162 | }; |
163 | ||
164 | struct acpi_thermal_trips { | |
165 | struct acpi_thermal_critical critical; | |
4be44fcd | 166 | struct acpi_thermal_hot hot; |
1da177e4 LT |
167 | struct acpi_thermal_passive passive; |
168 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
169 | }; | |
170 | ||
171 | struct acpi_thermal_flags { | |
4be44fcd LB |
172 | u8 cooling_mode:1; /* _SCP */ |
173 | u8 devices:1; /* _TZD */ | |
174 | u8 reserved:6; | |
1da177e4 LT |
175 | }; |
176 | ||
177 | struct acpi_thermal { | |
8348e1b1 | 178 | struct acpi_device * device; |
4be44fcd LB |
179 | acpi_bus_id name; |
180 | unsigned long temperature; | |
181 | unsigned long last_temperature; | |
182 | unsigned long polling_frequency; | |
4be44fcd | 183 | volatile u8 zombie; |
1da177e4 LT |
184 | struct acpi_thermal_flags flags; |
185 | struct acpi_thermal_state state; | |
186 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
187 | struct acpi_handle_list devices; |
188 | struct timer_list timer; | |
1da177e4 LT |
189 | }; |
190 | ||
d7508032 | 191 | static const struct file_operations acpi_thermal_state_fops = { |
4be44fcd LB |
192 | .open = acpi_thermal_state_open_fs, |
193 | .read = seq_read, | |
194 | .llseek = seq_lseek, | |
195 | .release = single_release, | |
1da177e4 LT |
196 | }; |
197 | ||
d7508032 | 198 | static const struct file_operations acpi_thermal_temp_fops = { |
4be44fcd LB |
199 | .open = acpi_thermal_temp_open_fs, |
200 | .read = seq_read, | |
201 | .llseek = seq_lseek, | |
202 | .release = single_release, | |
1da177e4 LT |
203 | }; |
204 | ||
d7508032 | 205 | static const struct file_operations acpi_thermal_trip_fops = { |
4be44fcd LB |
206 | .open = acpi_thermal_trip_open_fs, |
207 | .read = seq_read, | |
4be44fcd LB |
208 | .llseek = seq_lseek, |
209 | .release = single_release, | |
1da177e4 LT |
210 | }; |
211 | ||
d7508032 | 212 | static const struct file_operations acpi_thermal_cooling_fops = { |
4be44fcd LB |
213 | .open = acpi_thermal_cooling_open_fs, |
214 | .read = seq_read, | |
215 | .write = acpi_thermal_write_cooling_mode, | |
216 | .llseek = seq_lseek, | |
217 | .release = single_release, | |
1da177e4 LT |
218 | }; |
219 | ||
d7508032 | 220 | static const struct file_operations acpi_thermal_polling_fops = { |
4be44fcd LB |
221 | .open = acpi_thermal_polling_open_fs, |
222 | .read = seq_read, | |
223 | .write = acpi_thermal_write_polling, | |
224 | .llseek = seq_lseek, | |
225 | .release = single_release, | |
1da177e4 LT |
226 | }; |
227 | ||
228 | /* -------------------------------------------------------------------------- | |
229 | Thermal Zone Management | |
230 | -------------------------------------------------------------------------- */ | |
231 | ||
4be44fcd | 232 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 233 | { |
4be44fcd | 234 | acpi_status status = AE_OK; |
1da177e4 | 235 | |
1da177e4 LT |
236 | |
237 | if (!tz) | |
d550d98d | 238 | return -EINVAL; |
1da177e4 LT |
239 | |
240 | tz->last_temperature = tz->temperature; | |
241 | ||
4be44fcd | 242 | status = |
38ba7c9e | 243 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 244 | if (ACPI_FAILURE(status)) |
d550d98d | 245 | return -ENODEV; |
1da177e4 | 246 | |
4be44fcd LB |
247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
248 | tz->temperature)); | |
1da177e4 | 249 | |
d550d98d | 250 | return 0; |
1da177e4 LT |
251 | } |
252 | ||
4be44fcd | 253 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 254 | { |
4be44fcd | 255 | acpi_status status = AE_OK; |
1da177e4 | 256 | |
1da177e4 LT |
257 | |
258 | if (!tz) | |
d550d98d | 259 | return -EINVAL; |
1da177e4 | 260 | |
4be44fcd | 261 | status = |
38ba7c9e | 262 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 263 | &tz->polling_frequency); |
1da177e4 | 264 | if (ACPI_FAILURE(status)) |
d550d98d | 265 | return -ENODEV; |
1da177e4 | 266 | |
4be44fcd LB |
267 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
268 | tz->polling_frequency)); | |
1da177e4 | 269 | |
d550d98d | 270 | return 0; |
1da177e4 LT |
271 | } |
272 | ||
4be44fcd | 273 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 274 | { |
1da177e4 LT |
275 | |
276 | if (!tz) | |
d550d98d | 277 | return -EINVAL; |
1da177e4 LT |
278 | |
279 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
280 | ||
4be44fcd LB |
281 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
282 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 283 | tz->polling_frequency/10)); |
1da177e4 | 284 | |
d550d98d | 285 | return 0; |
1da177e4 LT |
286 | } |
287 | ||
4be44fcd | 288 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 289 | { |
4be44fcd LB |
290 | acpi_status status = AE_OK; |
291 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
292 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
293 | acpi_handle handle = NULL; | |
1da177e4 | 294 | |
1da177e4 LT |
295 | |
296 | if (!tz) | |
d550d98d | 297 | return -EINVAL; |
1da177e4 | 298 | |
38ba7c9e | 299 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
300 | if (ACPI_FAILURE(status)) { |
301 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 302 | return -ENODEV; |
1da177e4 LT |
303 | } |
304 | ||
305 | arg0.integer.value = mode; | |
306 | ||
307 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
308 | if (ACPI_FAILURE(status)) | |
d550d98d | 309 | return -ENODEV; |
1da177e4 | 310 | |
d550d98d | 311 | return 0; |
1da177e4 LT |
312 | } |
313 | ||
4be44fcd | 314 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 315 | { |
4be44fcd LB |
316 | acpi_status status = AE_OK; |
317 | int i = 0; | |
1da177e4 | 318 | |
1da177e4 LT |
319 | |
320 | if (!tz) | |
d550d98d | 321 | return -EINVAL; |
1da177e4 LT |
322 | |
323 | /* Critical Shutdown (required) */ | |
324 | ||
38ba7c9e | 325 | status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, |
4be44fcd | 326 | &tz->trips.critical.temperature); |
1da177e4 LT |
327 | if (ACPI_FAILURE(status)) { |
328 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 329 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 330 | return -ENODEV; |
4be44fcd | 331 | } else { |
1da177e4 | 332 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
333 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
334 | "Found critical threshold [%lu]\n", | |
335 | tz->trips.critical.temperature)); | |
1da177e4 LT |
336 | } |
337 | ||
338 | /* Critical Sleep (optional) */ | |
339 | ||
4be44fcd | 340 | status = |
38ba7c9e | 341 | acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, |
4be44fcd | 342 | &tz->trips.hot.temperature); |
1da177e4 LT |
343 | if (ACPI_FAILURE(status)) { |
344 | tz->trips.hot.flags.valid = 0; | |
345 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 346 | } else { |
1da177e4 | 347 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
348 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
349 | tz->trips.hot.temperature)); | |
1da177e4 LT |
350 | } |
351 | ||
352 | /* Passive: Processors (optional) */ | |
353 | ||
a70cdc52 LB |
354 | if (psv == -1) { |
355 | status = AE_SUPPORT; | |
356 | } else if (psv > 0) { | |
357 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
358 | status = AE_OK; | |
359 | } else { | |
360 | status = acpi_evaluate_integer(tz->device->handle, | |
361 | "_PSV", NULL, &tz->trips.passive.temperature); | |
362 | } | |
363 | ||
1da177e4 LT |
364 | if (ACPI_FAILURE(status)) { |
365 | tz->trips.passive.flags.valid = 0; | |
366 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 367 | } else { |
1da177e4 LT |
368 | tz->trips.passive.flags.valid = 1; |
369 | ||
4be44fcd | 370 | status = |
38ba7c9e | 371 | acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, |
4be44fcd | 372 | &tz->trips.passive.tc1); |
1da177e4 LT |
373 | if (ACPI_FAILURE(status)) |
374 | tz->trips.passive.flags.valid = 0; | |
375 | ||
4be44fcd | 376 | status = |
38ba7c9e | 377 | acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, |
4be44fcd | 378 | &tz->trips.passive.tc2); |
1da177e4 LT |
379 | if (ACPI_FAILURE(status)) |
380 | tz->trips.passive.flags.valid = 0; | |
381 | ||
4be44fcd | 382 | status = |
38ba7c9e | 383 | acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, |
4be44fcd | 384 | &tz->trips.passive.tsp); |
1da177e4 LT |
385 | if (ACPI_FAILURE(status)) |
386 | tz->trips.passive.flags.valid = 0; | |
387 | ||
4be44fcd | 388 | status = |
38ba7c9e | 389 | acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, |
4be44fcd | 390 | &tz->trips.passive.devices); |
1da177e4 LT |
391 | if (ACPI_FAILURE(status)) |
392 | tz->trips.passive.flags.valid = 0; | |
393 | ||
394 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 395 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 396 | else |
4be44fcd LB |
397 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
398 | "Found passive threshold [%lu]\n", | |
399 | tz->trips.passive.temperature)); | |
1da177e4 LT |
400 | } |
401 | ||
402 | /* Active: Fans, etc. (optional) */ | |
403 | ||
4be44fcd | 404 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 405 | |
4be44fcd | 406 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 407 | |
4be44fcd | 408 | status = |
38ba7c9e | 409 | acpi_evaluate_integer(tz->device->handle, name, NULL, |
4be44fcd | 410 | &tz->trips.active[i].temperature); |
1da177e4 LT |
411 | if (ACPI_FAILURE(status)) |
412 | break; | |
413 | ||
414 | name[2] = 'L'; | |
4be44fcd | 415 | status = |
38ba7c9e | 416 | acpi_evaluate_reference(tz->device->handle, name, NULL, |
4be44fcd | 417 | &tz->trips.active[i].devices); |
1da177e4 LT |
418 | if (ACPI_SUCCESS(status)) { |
419 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
420 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
421 | "Found active threshold [%d]:[%lu]\n", | |
422 | i, tz->trips.active[i].temperature)); | |
423 | } else | |
a6fc6720 TR |
424 | ACPI_EXCEPTION((AE_INFO, status, |
425 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
426 | } |
427 | ||
d550d98d | 428 | return 0; |
1da177e4 LT |
429 | } |
430 | ||
4be44fcd | 431 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 432 | { |
4be44fcd | 433 | acpi_status status = AE_OK; |
1da177e4 | 434 | |
1da177e4 LT |
435 | |
436 | if (!tz) | |
d550d98d | 437 | return -EINVAL; |
1da177e4 | 438 | |
4be44fcd | 439 | status = |
38ba7c9e | 440 | acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); |
1da177e4 | 441 | if (ACPI_FAILURE(status)) |
d550d98d | 442 | return -ENODEV; |
1da177e4 | 443 | |
d550d98d | 444 | return 0; |
1da177e4 LT |
445 | } |
446 | ||
4be44fcd | 447 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 448 | { |
f5487145 | 449 | if (!tz || !tz->trips.critical.flags.valid || nocrt) |
d550d98d | 450 | return -EINVAL; |
1da177e4 LT |
451 | |
452 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 453 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 454 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 455 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
456 | tz->trips.critical.flags.enabled = 0; |
457 | ||
4be44fcd LB |
458 | printk(KERN_EMERG |
459 | "Critical temperature reached (%ld C), shutting down.\n", | |
460 | KELVIN_TO_CELSIUS(tz->temperature)); | |
8348e1b1 | 461 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 462 | tz->trips.critical.flags.enabled); |
1da177e4 | 463 | |
10a0a8d4 | 464 | orderly_poweroff(true); |
1da177e4 | 465 | |
d550d98d | 466 | return 0; |
1da177e4 LT |
467 | } |
468 | ||
4be44fcd | 469 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 470 | { |
f5487145 | 471 | if (!tz || !tz->trips.hot.flags.valid || nocrt) |
d550d98d | 472 | return -EINVAL; |
1da177e4 LT |
473 | |
474 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 475 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 476 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 477 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
478 | tz->trips.hot.flags.enabled = 0; |
479 | ||
8348e1b1 | 480 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 481 | tz->trips.hot.flags.enabled); |
1da177e4 LT |
482 | |
483 | /* TBD: Call user-mode "sleep(S4)" function */ | |
484 | ||
d550d98d | 485 | return 0; |
1da177e4 LT |
486 | } |
487 | ||
1cbf4c56 | 488 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 489 | { |
1cbf4c56 | 490 | int result = 1; |
1da177e4 | 491 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
492 | int trend = 0; |
493 | int i = 0; | |
1da177e4 | 494 | |
1da177e4 LT |
495 | |
496 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 497 | return; |
1da177e4 LT |
498 | |
499 | passive = &(tz->trips.passive); | |
500 | ||
501 | /* | |
502 | * Above Trip? | |
503 | * ----------- | |
504 | * Calculate the thermal trend (using the passive cooling equation) | |
505 | * and modify the performance limit for all passive cooling devices | |
506 | * accordingly. Note that we assume symmetry. | |
507 | */ | |
508 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
509 | trend = |
510 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
511 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
512 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
513 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
514 | trend, passive->tc1, tz->temperature, | |
515 | tz->last_temperature, passive->tc2, | |
516 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 517 | passive->flags.enabled = 1; |
1da177e4 LT |
518 | /* Heating up? */ |
519 | if (trend > 0) | |
4be44fcd LB |
520 | for (i = 0; i < passive->devices.count; i++) |
521 | acpi_processor_set_thermal_limit(passive-> | |
522 | devices. | |
523 | handles[i], | |
524 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 525 | /* Cooling off? */ |
1cbf4c56 | 526 | else if (trend < 0) { |
4be44fcd | 527 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
528 | /* |
529 | * assume that we are on highest | |
530 | * freq/lowest thrott and can leave | |
531 | * passive mode, even in error case | |
532 | */ | |
533 | if (!acpi_processor_set_thermal_limit | |
534 | (passive->devices.handles[i], | |
535 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
536 | result = 0; | |
537 | /* | |
538 | * Leave cooling mode, even if the temp might | |
539 | * higher than trip point This is because some | |
540 | * machines might have long thermal polling | |
541 | * frequencies (tsp) defined. We will fall back | |
542 | * into passive mode in next cycle (probably quicker) | |
543 | */ | |
544 | if (result) { | |
545 | passive->flags.enabled = 0; | |
546 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
547 | "Disabling passive cooling, still above threshold," | |
548 | " but we are cooling down\n")); | |
549 | } | |
550 | } | |
551 | return; | |
1da177e4 LT |
552 | } |
553 | ||
554 | /* | |
555 | * Below Trip? | |
556 | * ----------- | |
557 | * Implement passive cooling hysteresis to slowly increase performance | |
558 | * and avoid thrashing around the passive trip point. Note that we | |
559 | * assume symmetry. | |
560 | */ | |
1cbf4c56 TR |
561 | if (!passive->flags.enabled) |
562 | return; | |
563 | for (i = 0; i < passive->devices.count; i++) | |
564 | if (!acpi_processor_set_thermal_limit | |
565 | (passive->devices.handles[i], | |
566 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
567 | result = 0; | |
568 | if (result) { | |
569 | passive->flags.enabled = 0; | |
570 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
571 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 572 | } |
1da177e4 LT |
573 | } |
574 | ||
1cbf4c56 | 575 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 576 | { |
4be44fcd | 577 | int result = 0; |
1da177e4 | 578 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
579 | int i = 0; |
580 | int j = 0; | |
581 | unsigned long maxtemp = 0; | |
1da177e4 | 582 | |
1da177e4 LT |
583 | |
584 | if (!tz) | |
1cbf4c56 | 585 | return; |
1da177e4 | 586 | |
4be44fcd | 587 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
588 | active = &(tz->trips.active[i]); |
589 | if (!active || !active->flags.valid) | |
590 | break; | |
1da177e4 | 591 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
592 | /* |
593 | * Above Threshold? | |
594 | * ---------------- | |
595 | * If not already enabled, turn ON all cooling devices | |
596 | * associated with this active threshold. | |
597 | */ | |
1da177e4 | 598 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
599 | tz->state.active_index = i; |
600 | maxtemp = active->temperature; | |
601 | if (active->flags.enabled) | |
602 | continue; | |
1da177e4 | 603 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
604 | result = |
605 | acpi_bus_set_power(active->devices. | |
606 | handles[j], | |
1cbf4c56 | 607 | ACPI_STATE_D0); |
1da177e4 | 608 | if (result) { |
cece9296 LB |
609 | printk(KERN_WARNING PREFIX |
610 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 611 | active->devices. |
cece9296 | 612 | handles[j]); |
1da177e4 LT |
613 | continue; |
614 | } | |
1cbf4c56 | 615 | active->flags.enabled = 1; |
4be44fcd | 616 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 617 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 618 | active->devices.handles[j])); |
1da177e4 | 619 | } |
1cbf4c56 TR |
620 | continue; |
621 | } | |
622 | if (!active->flags.enabled) | |
623 | continue; | |
624 | /* | |
625 | * Below Threshold? | |
626 | * ---------------- | |
627 | * Turn OFF all cooling devices associated with this | |
628 | * threshold. | |
629 | */ | |
630 | for (j = 0; j < active->devices.count; j++) { | |
631 | result = acpi_bus_set_power(active->devices.handles[j], | |
632 | ACPI_STATE_D3); | |
633 | if (result) { | |
cece9296 LB |
634 | printk(KERN_WARNING PREFIX |
635 | "Unable to turn cooling device [%p] 'off'\n", | |
636 | active->devices.handles[j]); | |
1cbf4c56 TR |
637 | continue; |
638 | } | |
639 | active->flags.enabled = 0; | |
640 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
641 | "Cooling device [%p] now 'off'\n", | |
642 | active->devices.handles[j])); | |
1da177e4 LT |
643 | } |
644 | } | |
1da177e4 LT |
645 | } |
646 | ||
4be44fcd | 647 | static void acpi_thermal_check(void *context); |
1da177e4 | 648 | |
4be44fcd | 649 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
650 | { |
651 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
652 | if (!tz->zombie) | |
b8d35192 | 653 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
654 | } |
655 | ||
4be44fcd | 656 | static void acpi_thermal_check(void *data) |
1da177e4 | 657 | { |
4be44fcd | 658 | int result = 0; |
50dd0969 | 659 | struct acpi_thermal *tz = data; |
4be44fcd LB |
660 | unsigned long sleep_time = 0; |
661 | int i = 0; | |
1da177e4 LT |
662 | struct acpi_thermal_state state; |
663 | ||
1da177e4 LT |
664 | |
665 | if (!tz) { | |
6468463a | 666 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 667 | return; |
1da177e4 LT |
668 | } |
669 | ||
670 | state = tz->state; | |
671 | ||
672 | result = acpi_thermal_get_temperature(tz); | |
673 | if (result) | |
d550d98d | 674 | return; |
4be44fcd | 675 | |
1da177e4 | 676 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 677 | |
1da177e4 LT |
678 | /* |
679 | * Check Trip Points | |
680 | * ----------------- | |
681 | * Compare the current temperature to the trip point values to see | |
682 | * if we've entered one of the thermal policy states. Note that | |
683 | * this function determines when a state is entered, but the | |
684 | * individual policy decides when it is exited (e.g. hysteresis). | |
685 | */ | |
686 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
687 | state.critical |= |
688 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
689 | if (tz->trips.hot.flags.valid) |
690 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
691 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
692 | state.passive |= |
693 | (tz->temperature >= tz->trips.passive.temperature); | |
694 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 695 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
696 | state.active |= |
697 | (tz->temperature >= | |
698 | tz->trips.active[i].temperature); | |
1da177e4 LT |
699 | |
700 | /* | |
701 | * Invoke Policy | |
702 | * ------------- | |
703 | * Separated from the above check to allow individual policy to | |
704 | * determine when to exit a given state. | |
705 | */ | |
706 | if (state.critical) | |
707 | acpi_thermal_critical(tz); | |
708 | if (state.hot) | |
709 | acpi_thermal_hot(tz); | |
710 | if (state.passive) | |
711 | acpi_thermal_passive(tz); | |
712 | if (state.active) | |
713 | acpi_thermal_active(tz); | |
714 | ||
715 | /* | |
716 | * Calculate State | |
717 | * --------------- | |
718 | * Again, separated from the above two to allow independent policy | |
719 | * decisions. | |
720 | */ | |
1cbf4c56 TR |
721 | tz->state.critical = tz->trips.critical.flags.enabled; |
722 | tz->state.hot = tz->trips.hot.flags.enabled; | |
723 | tz->state.passive = tz->trips.passive.flags.enabled; | |
724 | tz->state.active = 0; | |
4be44fcd | 725 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 726 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
727 | |
728 | /* | |
729 | * Calculate Sleep Time | |
730 | * -------------------- | |
731 | * If we're in the passive state, use _TSP's value. Otherwise | |
732 | * use the default polling frequency (e.g. _TZP). If no polling | |
733 | * frequency is specified then we'll wait forever (at least until | |
734 | * a thermal event occurs). Note that _TSP and _TZD values are | |
735 | * given in 1/10th seconds (we must covert to milliseconds). | |
736 | */ | |
737 | if (tz->state.passive) | |
738 | sleep_time = tz->trips.passive.tsp * 100; | |
739 | else if (tz->polling_frequency > 0) | |
740 | sleep_time = tz->polling_frequency * 100; | |
741 | ||
4be44fcd LB |
742 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
743 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
744 | |
745 | /* | |
746 | * Schedule Next Poll | |
747 | * ------------------ | |
748 | */ | |
749 | if (!sleep_time) { | |
750 | if (timer_pending(&(tz->timer))) | |
751 | del_timer(&(tz->timer)); | |
4be44fcd | 752 | } else { |
1da177e4 | 753 | if (timer_pending(&(tz->timer))) |
94e22e13 AM |
754 | mod_timer(&(tz->timer), |
755 | jiffies + (HZ * sleep_time) / 1000); | |
1da177e4 | 756 | else { |
4be44fcd | 757 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
758 | tz->timer.function = acpi_thermal_run; |
759 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
760 | add_timer(&(tz->timer)); | |
761 | } | |
762 | } | |
763 | ||
d550d98d | 764 | return; |
1da177e4 LT |
765 | } |
766 | ||
1da177e4 LT |
767 | /* -------------------------------------------------------------------------- |
768 | FS Interface (/proc) | |
769 | -------------------------------------------------------------------------- */ | |
770 | ||
4be44fcd | 771 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
772 | |
773 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
774 | { | |
50dd0969 | 775 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 776 | |
1da177e4 LT |
777 | |
778 | if (!tz) | |
779 | goto end; | |
780 | ||
781 | seq_puts(seq, "state: "); | |
782 | ||
4be44fcd LB |
783 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
784 | && !tz->state.active) | |
1da177e4 LT |
785 | seq_puts(seq, "ok\n"); |
786 | else { | |
787 | if (tz->state.critical) | |
788 | seq_puts(seq, "critical "); | |
789 | if (tz->state.hot) | |
790 | seq_puts(seq, "hot "); | |
791 | if (tz->state.passive) | |
792 | seq_puts(seq, "passive "); | |
793 | if (tz->state.active) | |
794 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
795 | seq_puts(seq, "\n"); | |
796 | } | |
797 | ||
4be44fcd | 798 | end: |
d550d98d | 799 | return 0; |
1da177e4 LT |
800 | } |
801 | ||
802 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
803 | { | |
804 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
805 | } | |
806 | ||
1da177e4 LT |
807 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
808 | { | |
4be44fcd | 809 | int result = 0; |
50dd0969 | 810 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 811 | |
1da177e4 LT |
812 | |
813 | if (!tz) | |
814 | goto end; | |
815 | ||
816 | result = acpi_thermal_get_temperature(tz); | |
817 | if (result) | |
818 | goto end; | |
819 | ||
4be44fcd LB |
820 | seq_printf(seq, "temperature: %ld C\n", |
821 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 822 | |
4be44fcd | 823 | end: |
d550d98d | 824 | return 0; |
1da177e4 LT |
825 | } |
826 | ||
827 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
828 | { | |
829 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
830 | } | |
831 | ||
1da177e4 LT |
832 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
833 | { | |
50dd0969 | 834 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 835 | struct acpi_device *device; |
e7c746ef TR |
836 | acpi_status status; |
837 | ||
4be44fcd LB |
838 | int i = 0; |
839 | int j = 0; | |
1da177e4 | 840 | |
1da177e4 LT |
841 | |
842 | if (!tz) | |
843 | goto end; | |
844 | ||
845 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
846 | seq_printf(seq, "critical (S5): %ld C%s", |
847 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
848 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
849 | |
850 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
851 | seq_printf(seq, "hot (S4): %ld C%s", |
852 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
853 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
854 | |
855 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
856 | seq_printf(seq, |
857 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
858 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
859 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
860 | tz->trips.passive.tsp); | |
861 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
862 | status = acpi_bus_get_device(tz->trips.passive.devices. |
863 | handles[j], &device); | |
864 | seq_printf(seq, "%4.4s ", status ? "" : | |
865 | acpi_device_bid(device)); | |
1da177e4 LT |
866 | } |
867 | seq_puts(seq, "\n"); | |
868 | } | |
869 | ||
870 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
871 | if (!(tz->trips.active[i].flags.valid)) | |
872 | break; | |
873 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
874 | i, |
875 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 876 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
877 | status = acpi_bus_get_device(tz->trips.active[i]. |
878 | devices.handles[j], | |
879 | &device); | |
880 | seq_printf(seq, "%4.4s ", status ? "" : | |
881 | acpi_device_bid(device)); | |
68ccfaa8 | 882 | } |
1da177e4 LT |
883 | seq_puts(seq, "\n"); |
884 | } | |
885 | ||
4be44fcd | 886 | end: |
d550d98d | 887 | return 0; |
1da177e4 LT |
888 | } |
889 | ||
890 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
891 | { | |
892 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
893 | } | |
894 | ||
1da177e4 LT |
895 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
896 | { | |
50dd0969 | 897 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 898 | |
1da177e4 LT |
899 | |
900 | if (!tz) | |
901 | goto end; | |
902 | ||
eaca2d3f | 903 | if (!tz->flags.cooling_mode) |
1da177e4 | 904 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 905 | else |
eaca2d3f | 906 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 907 | |
4be44fcd | 908 | end: |
d550d98d | 909 | return 0; |
1da177e4 LT |
910 | } |
911 | ||
912 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
913 | { | |
914 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 915 | PDE(inode)->data); |
1da177e4 LT |
916 | } |
917 | ||
918 | static ssize_t | |
4be44fcd LB |
919 | acpi_thermal_write_cooling_mode(struct file *file, |
920 | const char __user * buffer, | |
921 | size_t count, loff_t * ppos) | |
1da177e4 | 922 | { |
50dd0969 JE |
923 | struct seq_file *m = file->private_data; |
924 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
925 | int result = 0; |
926 | char mode_string[12] = { '\0' }; | |
1da177e4 | 927 | |
1da177e4 LT |
928 | |
929 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 930 | return -EINVAL; |
1da177e4 LT |
931 | |
932 | if (!tz->flags.cooling_mode) | |
d550d98d | 933 | return -ENODEV; |
1da177e4 LT |
934 | |
935 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 936 | return -EFAULT; |
4be44fcd | 937 | |
1da177e4 | 938 | mode_string[count] = '\0'; |
4be44fcd LB |
939 | |
940 | result = acpi_thermal_set_cooling_mode(tz, | |
941 | simple_strtoul(mode_string, NULL, | |
942 | 0)); | |
1da177e4 | 943 | if (result) |
d550d98d | 944 | return result; |
1da177e4 LT |
945 | |
946 | acpi_thermal_check(tz); | |
947 | ||
d550d98d | 948 | return count; |
1da177e4 LT |
949 | } |
950 | ||
1da177e4 LT |
951 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
952 | { | |
50dd0969 | 953 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 954 | |
1da177e4 LT |
955 | |
956 | if (!tz) | |
957 | goto end; | |
958 | ||
959 | if (!tz->polling_frequency) { | |
960 | seq_puts(seq, "<polling disabled>\n"); | |
961 | goto end; | |
962 | } | |
963 | ||
964 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 965 | (tz->polling_frequency / 10)); |
1da177e4 | 966 | |
4be44fcd | 967 | end: |
d550d98d | 968 | return 0; |
1da177e4 LT |
969 | } |
970 | ||
971 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
972 | { | |
973 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 974 | PDE(inode)->data); |
1da177e4 LT |
975 | } |
976 | ||
977 | static ssize_t | |
4be44fcd LB |
978 | acpi_thermal_write_polling(struct file *file, |
979 | const char __user * buffer, | |
980 | size_t count, loff_t * ppos) | |
1da177e4 | 981 | { |
50dd0969 JE |
982 | struct seq_file *m = file->private_data; |
983 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
984 | int result = 0; |
985 | char polling_string[12] = { '\0' }; | |
986 | int seconds = 0; | |
1da177e4 | 987 | |
1da177e4 LT |
988 | |
989 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 990 | return -EINVAL; |
4be44fcd | 991 | |
1da177e4 | 992 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 993 | return -EFAULT; |
4be44fcd | 994 | |
1da177e4 LT |
995 | polling_string[count] = '\0'; |
996 | ||
997 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 998 | |
1da177e4 LT |
999 | result = acpi_thermal_set_polling(tz, seconds); |
1000 | if (result) | |
d550d98d | 1001 | return result; |
1da177e4 LT |
1002 | |
1003 | acpi_thermal_check(tz); | |
1004 | ||
d550d98d | 1005 | return count; |
1da177e4 LT |
1006 | } |
1007 | ||
4be44fcd | 1008 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1009 | { |
4be44fcd | 1010 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1011 | |
1da177e4 LT |
1012 | |
1013 | if (!acpi_device_dir(device)) { | |
1014 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1015 | acpi_thermal_dir); |
1da177e4 | 1016 | if (!acpi_device_dir(device)) |
d550d98d | 1017 | return -ENODEV; |
1da177e4 LT |
1018 | acpi_device_dir(device)->owner = THIS_MODULE; |
1019 | } | |
1020 | ||
1021 | /* 'state' [R] */ | |
1022 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1023 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1024 | if (!entry) |
d550d98d | 1025 | return -ENODEV; |
1da177e4 LT |
1026 | else { |
1027 | entry->proc_fops = &acpi_thermal_state_fops; | |
1028 | entry->data = acpi_driver_data(device); | |
1029 | entry->owner = THIS_MODULE; | |
1030 | } | |
1031 | ||
1032 | /* 'temperature' [R] */ | |
1033 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1034 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1035 | if (!entry) |
d550d98d | 1036 | return -ENODEV; |
1da177e4 LT |
1037 | else { |
1038 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1039 | entry->data = acpi_driver_data(device); | |
1040 | entry->owner = THIS_MODULE; | |
1041 | } | |
1042 | ||
1043 | /* 'trip_points' [R/W] */ | |
1044 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1045 | S_IFREG | S_IRUGO | S_IWUSR, |
1046 | acpi_device_dir(device)); | |
1da177e4 | 1047 | if (!entry) |
d550d98d | 1048 | return -ENODEV; |
1da177e4 LT |
1049 | else { |
1050 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1051 | entry->data = acpi_driver_data(device); | |
1052 | entry->owner = THIS_MODULE; | |
1053 | } | |
1054 | ||
1055 | /* 'cooling_mode' [R/W] */ | |
1056 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1057 | S_IFREG | S_IRUGO | S_IWUSR, |
1058 | acpi_device_dir(device)); | |
1da177e4 | 1059 | if (!entry) |
d550d98d | 1060 | return -ENODEV; |
1da177e4 LT |
1061 | else { |
1062 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1063 | entry->data = acpi_driver_data(device); | |
1064 | entry->owner = THIS_MODULE; | |
1065 | } | |
1066 | ||
1067 | /* 'polling_frequency' [R/W] */ | |
1068 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1069 | S_IFREG | S_IRUGO | S_IWUSR, |
1070 | acpi_device_dir(device)); | |
1da177e4 | 1071 | if (!entry) |
d550d98d | 1072 | return -ENODEV; |
1da177e4 LT |
1073 | else { |
1074 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1075 | entry->data = acpi_driver_data(device); | |
1076 | entry->owner = THIS_MODULE; | |
1077 | } | |
1078 | ||
d550d98d | 1079 | return 0; |
1da177e4 LT |
1080 | } |
1081 | ||
4be44fcd | 1082 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1083 | { |
1da177e4 LT |
1084 | |
1085 | if (acpi_device_dir(device)) { | |
1086 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1087 | acpi_device_dir(device)); | |
1088 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1089 | acpi_device_dir(device)); | |
1090 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1091 | acpi_device_dir(device)); | |
1092 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1093 | acpi_device_dir(device)); | |
1094 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1095 | acpi_device_dir(device)); | |
1096 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1097 | acpi_device_dir(device) = NULL; | |
1098 | } | |
1099 | ||
d550d98d | 1100 | return 0; |
1da177e4 LT |
1101 | } |
1102 | ||
1da177e4 LT |
1103 | /* -------------------------------------------------------------------------- |
1104 | Driver Interface | |
1105 | -------------------------------------------------------------------------- */ | |
1106 | ||
4be44fcd | 1107 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1108 | { |
50dd0969 | 1109 | struct acpi_thermal *tz = data; |
4be44fcd | 1110 | struct acpi_device *device = NULL; |
1da177e4 | 1111 | |
1da177e4 LT |
1112 | |
1113 | if (!tz) | |
d550d98d | 1114 | return; |
1da177e4 | 1115 | |
8348e1b1 | 1116 | device = tz->device; |
1da177e4 LT |
1117 | |
1118 | switch (event) { | |
1119 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1120 | acpi_thermal_check(tz); | |
1121 | break; | |
1122 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1123 | acpi_thermal_get_trip_points(tz); | |
1124 | acpi_thermal_check(tz); | |
1125 | acpi_bus_generate_event(device, event, 0); | |
1126 | break; | |
1127 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1128 | if (tz->flags.devices) | |
1129 | acpi_thermal_get_devices(tz); | |
1130 | acpi_bus_generate_event(device, event, 0); | |
1131 | break; | |
1132 | default: | |
1133 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1134 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1135 | break; |
1136 | } | |
1137 | ||
d550d98d | 1138 | return; |
1da177e4 LT |
1139 | } |
1140 | ||
4be44fcd | 1141 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1142 | { |
4be44fcd | 1143 | int result = 0; |
1da177e4 | 1144 | |
1da177e4 LT |
1145 | |
1146 | if (!tz) | |
d550d98d | 1147 | return -EINVAL; |
1da177e4 LT |
1148 | |
1149 | /* Get temperature [_TMP] (required) */ | |
1150 | result = acpi_thermal_get_temperature(tz); | |
1151 | if (result) | |
d550d98d | 1152 | return result; |
1da177e4 LT |
1153 | |
1154 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1155 | result = acpi_thermal_get_trip_points(tz); | |
1156 | if (result) | |
d550d98d | 1157 | return result; |
1da177e4 LT |
1158 | |
1159 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1160 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1161 | if (!result) |
1da177e4 | 1162 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1163 | |
1164 | /* Get default polling frequency [_TZP] (optional) */ | |
1165 | if (tzp) | |
1166 | tz->polling_frequency = tzp; | |
1167 | else | |
1168 | acpi_thermal_get_polling_frequency(tz); | |
1169 | ||
1170 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1171 | result = acpi_thermal_get_devices(tz); | |
1172 | if (!result) | |
1173 | tz->flags.devices = 1; | |
1174 | ||
d550d98d | 1175 | return 0; |
1da177e4 LT |
1176 | } |
1177 | ||
4be44fcd | 1178 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1179 | { |
4be44fcd LB |
1180 | int result = 0; |
1181 | acpi_status status = AE_OK; | |
1182 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1183 | |
1da177e4 LT |
1184 | |
1185 | if (!device) | |
d550d98d | 1186 | return -EINVAL; |
1da177e4 | 1187 | |
36bcbec7 | 1188 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1189 | if (!tz) |
d550d98d | 1190 | return -ENOMEM; |
1da177e4 | 1191 | |
8348e1b1 | 1192 | tz->device = device; |
1da177e4 LT |
1193 | strcpy(tz->name, device->pnp.bus_id); |
1194 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1195 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1196 | acpi_driver_data(device) = tz; | |
1197 | ||
1198 | result = acpi_thermal_get_info(tz); | |
1199 | if (result) | |
1200 | goto end; | |
1201 | ||
1202 | result = acpi_thermal_add_fs(device); | |
1203 | if (result) | |
09047e75 | 1204 | goto end; |
1da177e4 LT |
1205 | |
1206 | init_timer(&tz->timer); | |
1207 | ||
1208 | acpi_thermal_check(tz); | |
1209 | ||
38ba7c9e | 1210 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1211 | ACPI_DEVICE_NOTIFY, |
1212 | acpi_thermal_notify, tz); | |
1da177e4 | 1213 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1214 | result = -ENODEV; |
1215 | goto end; | |
1216 | } | |
1217 | ||
1218 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1219 | acpi_device_name(device), acpi_device_bid(device), |
1220 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1221 | |
4be44fcd | 1222 | end: |
1da177e4 LT |
1223 | if (result) { |
1224 | acpi_thermal_remove_fs(device); | |
1225 | kfree(tz); | |
1226 | } | |
1227 | ||
d550d98d | 1228 | return result; |
1da177e4 LT |
1229 | } |
1230 | ||
4be44fcd | 1231 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1232 | { |
4be44fcd LB |
1233 | acpi_status status = AE_OK; |
1234 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1235 | |
1da177e4 LT |
1236 | |
1237 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1238 | return -EINVAL; |
1da177e4 | 1239 | |
50dd0969 | 1240 | tz = acpi_driver_data(device); |
1da177e4 LT |
1241 | |
1242 | /* avoid timer adding new defer task */ | |
1243 | tz->zombie = 1; | |
1244 | /* wait for running timer (on other CPUs) finish */ | |
1245 | del_timer_sync(&(tz->timer)); | |
1246 | /* synchronize deferred task */ | |
1247 | acpi_os_wait_events_complete(NULL); | |
1248 | /* deferred task may reinsert timer */ | |
1249 | del_timer_sync(&(tz->timer)); | |
1250 | ||
38ba7c9e | 1251 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1252 | ACPI_DEVICE_NOTIFY, |
1253 | acpi_thermal_notify); | |
1da177e4 LT |
1254 | |
1255 | /* Terminate policy */ | |
4be44fcd | 1256 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1257 | tz->trips.passive.flags.enabled = 0; |
1258 | acpi_thermal_passive(tz); | |
1259 | } | |
1260 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1261 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1262 | tz->trips.active[0].flags.enabled = 0; |
1263 | acpi_thermal_active(tz); | |
1264 | } | |
1265 | ||
1266 | acpi_thermal_remove_fs(device); | |
1267 | ||
1268 | kfree(tz); | |
d550d98d | 1269 | return 0; |
1da177e4 LT |
1270 | } |
1271 | ||
5d9464a4 | 1272 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1273 | { |
1274 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1275 | int i, j, power_state, result; |
1276 | ||
74ce1468 KK |
1277 | |
1278 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1279 | return -EINVAL; |
74ce1468 | 1280 | |
50dd0969 | 1281 | tz = acpi_driver_data(device); |
74ce1468 | 1282 | |
bed936f7 | 1283 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1284 | if (!(&tz->trips.active[i])) |
1285 | break; | |
1286 | if (!tz->trips.active[i].flags.valid) | |
1287 | break; | |
1288 | tz->trips.active[i].flags.enabled = 1; | |
1289 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1290 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1291 | handles[j], &power_state); | |
1292 | if (result || (power_state != ACPI_STATE_D0)) { | |
1293 | tz->trips.active[i].flags.enabled = 0; | |
1294 | break; | |
1295 | } | |
bed936f7 | 1296 | } |
b1028c54 | 1297 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1298 | } |
1299 | ||
b1028c54 | 1300 | acpi_thermal_check(tz); |
74ce1468 KK |
1301 | |
1302 | return AE_OK; | |
1303 | } | |
1304 | ||
4be44fcd | 1305 | static int __init acpi_thermal_init(void) |
1da177e4 | 1306 | { |
4be44fcd | 1307 | int result = 0; |
1da177e4 | 1308 | |
72b33ef8 LB |
1309 | if (off) { |
1310 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1311 | return -ENODEV; | |
1312 | } | |
1da177e4 LT |
1313 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1314 | if (!acpi_thermal_dir) | |
d550d98d | 1315 | return -ENODEV; |
1da177e4 LT |
1316 | acpi_thermal_dir->owner = THIS_MODULE; |
1317 | ||
1318 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1319 | if (result < 0) { | |
1320 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1321 | return -ENODEV; |
1da177e4 LT |
1322 | } |
1323 | ||
d550d98d | 1324 | return 0; |
1da177e4 LT |
1325 | } |
1326 | ||
4be44fcd | 1327 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1328 | { |
1da177e4 LT |
1329 | |
1330 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1331 | ||
1332 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1333 | ||
d550d98d | 1334 | return; |
1da177e4 LT |
1335 | } |
1336 | ||
1da177e4 LT |
1337 | module_init(acpi_thermal_init); |
1338 | module_exit(acpi_thermal_exit); |