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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> | |
43 | #include <asm/uaccess.h> | |
44 | ||
45 | #include <acpi/acpi_bus.h> | |
46 | #include <acpi/acpi_drivers.h> | |
47 | ||
48 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
49 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
1da177e4 LT |
50 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
51 | #define ACPI_THERMAL_FILE_STATE "state" | |
52 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
53 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
54 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
55 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
56 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
57 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
58 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
59 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
60 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
61 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
62 | #define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" |
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; | |
78 | module_param(tzp, int, 0); | |
79 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); | |
80 | ||
4be44fcd LB |
81 | static int acpi_thermal_add(struct acpi_device *device); |
82 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 83 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
84 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
85 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
86 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 87 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
88 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
89 | const char __user *, size_t, | |
90 | loff_t *); | |
1da177e4 | 91 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
92 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
93 | size_t, loff_t *); | |
1da177e4 LT |
94 | |
95 | static struct acpi_driver acpi_thermal_driver = { | |
c2b6705b | 96 | .name = "thermal", |
4be44fcd LB |
97 | .class = ACPI_THERMAL_CLASS, |
98 | .ids = ACPI_THERMAL_HID, | |
99 | .ops = { | |
100 | .add = acpi_thermal_add, | |
101 | .remove = acpi_thermal_remove, | |
74ce1468 | 102 | .resume = acpi_thermal_resume, |
4be44fcd | 103 | }, |
1da177e4 LT |
104 | }; |
105 | ||
106 | struct acpi_thermal_state { | |
4be44fcd LB |
107 | u8 critical:1; |
108 | u8 hot:1; | |
109 | u8 passive:1; | |
110 | u8 active:1; | |
111 | u8 reserved:4; | |
112 | int active_index; | |
1da177e4 LT |
113 | }; |
114 | ||
115 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
116 | u8 valid:1; |
117 | u8 enabled:1; | |
118 | u8 reserved:6; | |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct acpi_thermal_critical { | |
122 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 123 | unsigned long temperature; |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_thermal_hot { | |
127 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 128 | unsigned long temperature; |
1da177e4 LT |
129 | }; |
130 | ||
131 | struct acpi_thermal_passive { | |
132 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
133 | unsigned long temperature; |
134 | unsigned long tc1; | |
135 | unsigned long tc2; | |
136 | unsigned long tsp; | |
137 | struct acpi_handle_list devices; | |
1da177e4 LT |
138 | }; |
139 | ||
140 | struct acpi_thermal_active { | |
141 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
142 | unsigned long temperature; |
143 | struct acpi_handle_list devices; | |
1da177e4 LT |
144 | }; |
145 | ||
146 | struct acpi_thermal_trips { | |
147 | struct acpi_thermal_critical critical; | |
4be44fcd | 148 | struct acpi_thermal_hot hot; |
1da177e4 LT |
149 | struct acpi_thermal_passive passive; |
150 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
151 | }; | |
152 | ||
153 | struct acpi_thermal_flags { | |
4be44fcd LB |
154 | u8 cooling_mode:1; /* _SCP */ |
155 | u8 devices:1; /* _TZD */ | |
156 | u8 reserved:6; | |
1da177e4 LT |
157 | }; |
158 | ||
159 | struct acpi_thermal { | |
8348e1b1 | 160 | struct acpi_device * device; |
4be44fcd LB |
161 | acpi_bus_id name; |
162 | unsigned long temperature; | |
163 | unsigned long last_temperature; | |
164 | unsigned long polling_frequency; | |
4be44fcd | 165 | volatile u8 zombie; |
1da177e4 LT |
166 | struct acpi_thermal_flags flags; |
167 | struct acpi_thermal_state state; | |
168 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
169 | struct acpi_handle_list devices; |
170 | struct timer_list timer; | |
1da177e4 LT |
171 | }; |
172 | ||
d7508032 | 173 | static const struct file_operations acpi_thermal_state_fops = { |
4be44fcd LB |
174 | .open = acpi_thermal_state_open_fs, |
175 | .read = seq_read, | |
176 | .llseek = seq_lseek, | |
177 | .release = single_release, | |
1da177e4 LT |
178 | }; |
179 | ||
d7508032 | 180 | static const struct file_operations acpi_thermal_temp_fops = { |
4be44fcd LB |
181 | .open = acpi_thermal_temp_open_fs, |
182 | .read = seq_read, | |
183 | .llseek = seq_lseek, | |
184 | .release = single_release, | |
1da177e4 LT |
185 | }; |
186 | ||
d7508032 | 187 | static const struct file_operations acpi_thermal_trip_fops = { |
4be44fcd LB |
188 | .open = acpi_thermal_trip_open_fs, |
189 | .read = seq_read, | |
4be44fcd LB |
190 | .llseek = seq_lseek, |
191 | .release = single_release, | |
1da177e4 LT |
192 | }; |
193 | ||
d7508032 | 194 | static const struct file_operations acpi_thermal_cooling_fops = { |
4be44fcd LB |
195 | .open = acpi_thermal_cooling_open_fs, |
196 | .read = seq_read, | |
197 | .write = acpi_thermal_write_cooling_mode, | |
198 | .llseek = seq_lseek, | |
199 | .release = single_release, | |
1da177e4 LT |
200 | }; |
201 | ||
d7508032 | 202 | static const struct file_operations acpi_thermal_polling_fops = { |
4be44fcd LB |
203 | .open = acpi_thermal_polling_open_fs, |
204 | .read = seq_read, | |
205 | .write = acpi_thermal_write_polling, | |
206 | .llseek = seq_lseek, | |
207 | .release = single_release, | |
1da177e4 LT |
208 | }; |
209 | ||
210 | /* -------------------------------------------------------------------------- | |
211 | Thermal Zone Management | |
212 | -------------------------------------------------------------------------- */ | |
213 | ||
4be44fcd | 214 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 215 | { |
4be44fcd | 216 | acpi_status status = AE_OK; |
1da177e4 | 217 | |
1da177e4 LT |
218 | |
219 | if (!tz) | |
d550d98d | 220 | return -EINVAL; |
1da177e4 LT |
221 | |
222 | tz->last_temperature = tz->temperature; | |
223 | ||
4be44fcd | 224 | status = |
38ba7c9e | 225 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 226 | if (ACPI_FAILURE(status)) |
d550d98d | 227 | return -ENODEV; |
1da177e4 | 228 | |
4be44fcd LB |
229 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
230 | tz->temperature)); | |
1da177e4 | 231 | |
d550d98d | 232 | return 0; |
1da177e4 LT |
233 | } |
234 | ||
4be44fcd | 235 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 236 | { |
4be44fcd | 237 | acpi_status status = AE_OK; |
1da177e4 | 238 | |
1da177e4 LT |
239 | |
240 | if (!tz) | |
d550d98d | 241 | return -EINVAL; |
1da177e4 | 242 | |
4be44fcd | 243 | status = |
38ba7c9e | 244 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 245 | &tz->polling_frequency); |
1da177e4 | 246 | if (ACPI_FAILURE(status)) |
d550d98d | 247 | return -ENODEV; |
1da177e4 | 248 | |
4be44fcd LB |
249 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
250 | tz->polling_frequency)); | |
1da177e4 | 251 | |
d550d98d | 252 | return 0; |
1da177e4 LT |
253 | } |
254 | ||
4be44fcd | 255 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 256 | { |
1da177e4 LT |
257 | |
258 | if (!tz) | |
d550d98d | 259 | return -EINVAL; |
1da177e4 LT |
260 | |
261 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
262 | ||
4be44fcd LB |
263 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
264 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 265 | tz->polling_frequency/10)); |
1da177e4 | 266 | |
d550d98d | 267 | return 0; |
1da177e4 LT |
268 | } |
269 | ||
4be44fcd | 270 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 271 | { |
4be44fcd LB |
272 | acpi_status status = AE_OK; |
273 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
274 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
275 | acpi_handle handle = NULL; | |
1da177e4 | 276 | |
1da177e4 LT |
277 | |
278 | if (!tz) | |
d550d98d | 279 | return -EINVAL; |
1da177e4 | 280 | |
38ba7c9e | 281 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
282 | if (ACPI_FAILURE(status)) { |
283 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 284 | return -ENODEV; |
1da177e4 LT |
285 | } |
286 | ||
287 | arg0.integer.value = mode; | |
288 | ||
289 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
290 | if (ACPI_FAILURE(status)) | |
d550d98d | 291 | return -ENODEV; |
1da177e4 | 292 | |
d550d98d | 293 | return 0; |
1da177e4 LT |
294 | } |
295 | ||
4be44fcd | 296 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 297 | { |
4be44fcd LB |
298 | acpi_status status = AE_OK; |
299 | int i = 0; | |
1da177e4 | 300 | |
1da177e4 LT |
301 | |
302 | if (!tz) | |
d550d98d | 303 | return -EINVAL; |
1da177e4 LT |
304 | |
305 | /* Critical Shutdown (required) */ | |
306 | ||
38ba7c9e | 307 | status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, |
4be44fcd | 308 | &tz->trips.critical.temperature); |
1da177e4 LT |
309 | if (ACPI_FAILURE(status)) { |
310 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 311 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 312 | return -ENODEV; |
4be44fcd | 313 | } else { |
1da177e4 | 314 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
316 | "Found critical threshold [%lu]\n", | |
317 | tz->trips.critical.temperature)); | |
1da177e4 LT |
318 | } |
319 | ||
320 | /* Critical Sleep (optional) */ | |
321 | ||
4be44fcd | 322 | status = |
38ba7c9e | 323 | acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, |
4be44fcd | 324 | &tz->trips.hot.temperature); |
1da177e4 LT |
325 | if (ACPI_FAILURE(status)) { |
326 | tz->trips.hot.flags.valid = 0; | |
327 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 328 | } else { |
1da177e4 | 329 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
330 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
331 | tz->trips.hot.temperature)); | |
1da177e4 LT |
332 | } |
333 | ||
334 | /* Passive: Processors (optional) */ | |
335 | ||
4be44fcd | 336 | status = |
38ba7c9e | 337 | acpi_evaluate_integer(tz->device->handle, "_PSV", NULL, |
4be44fcd | 338 | &tz->trips.passive.temperature); |
1da177e4 LT |
339 | if (ACPI_FAILURE(status)) { |
340 | tz->trips.passive.flags.valid = 0; | |
341 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 342 | } else { |
1da177e4 LT |
343 | tz->trips.passive.flags.valid = 1; |
344 | ||
4be44fcd | 345 | status = |
38ba7c9e | 346 | acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, |
4be44fcd | 347 | &tz->trips.passive.tc1); |
1da177e4 LT |
348 | if (ACPI_FAILURE(status)) |
349 | tz->trips.passive.flags.valid = 0; | |
350 | ||
4be44fcd | 351 | status = |
38ba7c9e | 352 | acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, |
4be44fcd | 353 | &tz->trips.passive.tc2); |
1da177e4 LT |
354 | if (ACPI_FAILURE(status)) |
355 | tz->trips.passive.flags.valid = 0; | |
356 | ||
4be44fcd | 357 | status = |
38ba7c9e | 358 | acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, |
4be44fcd | 359 | &tz->trips.passive.tsp); |
1da177e4 LT |
360 | if (ACPI_FAILURE(status)) |
361 | tz->trips.passive.flags.valid = 0; | |
362 | ||
4be44fcd | 363 | status = |
38ba7c9e | 364 | acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, |
4be44fcd | 365 | &tz->trips.passive.devices); |
1da177e4 LT |
366 | if (ACPI_FAILURE(status)) |
367 | tz->trips.passive.flags.valid = 0; | |
368 | ||
369 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 370 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 371 | else |
4be44fcd LB |
372 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
373 | "Found passive threshold [%lu]\n", | |
374 | tz->trips.passive.temperature)); | |
1da177e4 LT |
375 | } |
376 | ||
377 | /* Active: Fans, etc. (optional) */ | |
378 | ||
4be44fcd | 379 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 380 | |
4be44fcd | 381 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 382 | |
4be44fcd | 383 | status = |
38ba7c9e | 384 | acpi_evaluate_integer(tz->device->handle, name, NULL, |
4be44fcd | 385 | &tz->trips.active[i].temperature); |
1da177e4 LT |
386 | if (ACPI_FAILURE(status)) |
387 | break; | |
388 | ||
389 | name[2] = 'L'; | |
4be44fcd | 390 | status = |
38ba7c9e | 391 | acpi_evaluate_reference(tz->device->handle, name, NULL, |
4be44fcd | 392 | &tz->trips.active[i].devices); |
1da177e4 LT |
393 | if (ACPI_SUCCESS(status)) { |
394 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
395 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
396 | "Found active threshold [%d]:[%lu]\n", | |
397 | i, tz->trips.active[i].temperature)); | |
398 | } else | |
a6fc6720 TR |
399 | ACPI_EXCEPTION((AE_INFO, status, |
400 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
401 | } |
402 | ||
d550d98d | 403 | return 0; |
1da177e4 LT |
404 | } |
405 | ||
4be44fcd | 406 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 407 | { |
4be44fcd | 408 | acpi_status status = AE_OK; |
1da177e4 | 409 | |
1da177e4 LT |
410 | |
411 | if (!tz) | |
d550d98d | 412 | return -EINVAL; |
1da177e4 | 413 | |
4be44fcd | 414 | status = |
38ba7c9e | 415 | acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); |
1da177e4 | 416 | if (ACPI_FAILURE(status)) |
d550d98d | 417 | return -ENODEV; |
1da177e4 | 418 | |
d550d98d | 419 | return 0; |
1da177e4 LT |
420 | } |
421 | ||
4be44fcd | 422 | static int acpi_thermal_call_usermode(char *path) |
1da177e4 | 423 | { |
4be44fcd LB |
424 | char *argv[2] = { NULL, NULL }; |
425 | char *envp[3] = { NULL, NULL, NULL }; | |
1da177e4 | 426 | |
1da177e4 LT |
427 | |
428 | if (!path) | |
d550d98d | 429 | return -EINVAL; |
1da177e4 LT |
430 | |
431 | argv[0] = path; | |
432 | ||
433 | /* minimal command environment */ | |
434 | envp[0] = "HOME=/"; | |
435 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
4be44fcd | 436 | |
1da177e4 LT |
437 | call_usermodehelper(argv[0], argv, envp, 0); |
438 | ||
d550d98d | 439 | return 0; |
1da177e4 LT |
440 | } |
441 | ||
4be44fcd | 442 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 443 | { |
1da177e4 | 444 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 445 | return -EINVAL; |
1da177e4 LT |
446 | |
447 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 448 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 449 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 450 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
451 | tz->trips.critical.flags.enabled = 0; |
452 | ||
4be44fcd LB |
453 | printk(KERN_EMERG |
454 | "Critical temperature reached (%ld C), shutting down.\n", | |
455 | KELVIN_TO_CELSIUS(tz->temperature)); | |
8348e1b1 | 456 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 457 | tz->trips.critical.flags.enabled); |
1da177e4 LT |
458 | |
459 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
460 | ||
d550d98d | 461 | return 0; |
1da177e4 LT |
462 | } |
463 | ||
4be44fcd | 464 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 465 | { |
1da177e4 | 466 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 467 | return -EINVAL; |
1da177e4 LT |
468 | |
469 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 470 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 471 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 472 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
473 | tz->trips.hot.flags.enabled = 0; |
474 | ||
8348e1b1 | 475 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 476 | tz->trips.hot.flags.enabled); |
1da177e4 LT |
477 | |
478 | /* TBD: Call user-mode "sleep(S4)" function */ | |
479 | ||
d550d98d | 480 | return 0; |
1da177e4 LT |
481 | } |
482 | ||
1cbf4c56 | 483 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 484 | { |
1cbf4c56 | 485 | int result = 1; |
1da177e4 | 486 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
487 | int trend = 0; |
488 | int i = 0; | |
1da177e4 | 489 | |
1da177e4 LT |
490 | |
491 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 492 | return; |
1da177e4 LT |
493 | |
494 | passive = &(tz->trips.passive); | |
495 | ||
496 | /* | |
497 | * Above Trip? | |
498 | * ----------- | |
499 | * Calculate the thermal trend (using the passive cooling equation) | |
500 | * and modify the performance limit for all passive cooling devices | |
501 | * accordingly. Note that we assume symmetry. | |
502 | */ | |
503 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
504 | trend = |
505 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
506 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
508 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
509 | trend, passive->tc1, tz->temperature, | |
510 | tz->last_temperature, passive->tc2, | |
511 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 512 | passive->flags.enabled = 1; |
1da177e4 LT |
513 | /* Heating up? */ |
514 | if (trend > 0) | |
4be44fcd LB |
515 | for (i = 0; i < passive->devices.count; i++) |
516 | acpi_processor_set_thermal_limit(passive-> | |
517 | devices. | |
518 | handles[i], | |
519 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 520 | /* Cooling off? */ |
1cbf4c56 | 521 | else if (trend < 0) { |
4be44fcd | 522 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
523 | /* |
524 | * assume that we are on highest | |
525 | * freq/lowest thrott and can leave | |
526 | * passive mode, even in error case | |
527 | */ | |
528 | if (!acpi_processor_set_thermal_limit | |
529 | (passive->devices.handles[i], | |
530 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
531 | result = 0; | |
532 | /* | |
533 | * Leave cooling mode, even if the temp might | |
534 | * higher than trip point This is because some | |
535 | * machines might have long thermal polling | |
536 | * frequencies (tsp) defined. We will fall back | |
537 | * into passive mode in next cycle (probably quicker) | |
538 | */ | |
539 | if (result) { | |
540 | passive->flags.enabled = 0; | |
541 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
542 | "Disabling passive cooling, still above threshold," | |
543 | " but we are cooling down\n")); | |
544 | } | |
545 | } | |
546 | return; | |
1da177e4 LT |
547 | } |
548 | ||
549 | /* | |
550 | * Below Trip? | |
551 | * ----------- | |
552 | * Implement passive cooling hysteresis to slowly increase performance | |
553 | * and avoid thrashing around the passive trip point. Note that we | |
554 | * assume symmetry. | |
555 | */ | |
1cbf4c56 TR |
556 | if (!passive->flags.enabled) |
557 | return; | |
558 | for (i = 0; i < passive->devices.count; i++) | |
559 | if (!acpi_processor_set_thermal_limit | |
560 | (passive->devices.handles[i], | |
561 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
562 | result = 0; | |
563 | if (result) { | |
564 | passive->flags.enabled = 0; | |
565 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
566 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 567 | } |
1da177e4 LT |
568 | } |
569 | ||
1cbf4c56 | 570 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 571 | { |
4be44fcd | 572 | int result = 0; |
1da177e4 | 573 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
574 | int i = 0; |
575 | int j = 0; | |
576 | unsigned long maxtemp = 0; | |
1da177e4 | 577 | |
1da177e4 LT |
578 | |
579 | if (!tz) | |
1cbf4c56 | 580 | return; |
1da177e4 | 581 | |
4be44fcd | 582 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
583 | active = &(tz->trips.active[i]); |
584 | if (!active || !active->flags.valid) | |
585 | break; | |
1da177e4 | 586 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
587 | /* |
588 | * Above Threshold? | |
589 | * ---------------- | |
590 | * If not already enabled, turn ON all cooling devices | |
591 | * associated with this active threshold. | |
592 | */ | |
1da177e4 | 593 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
594 | tz->state.active_index = i; |
595 | maxtemp = active->temperature; | |
596 | if (active->flags.enabled) | |
597 | continue; | |
1da177e4 | 598 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
599 | result = |
600 | acpi_bus_set_power(active->devices. | |
601 | handles[j], | |
1cbf4c56 | 602 | ACPI_STATE_D0); |
1da177e4 | 603 | if (result) { |
cece9296 LB |
604 | printk(KERN_WARNING PREFIX |
605 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 606 | active->devices. |
cece9296 | 607 | handles[j]); |
1da177e4 LT |
608 | continue; |
609 | } | |
1cbf4c56 | 610 | active->flags.enabled = 1; |
4be44fcd | 611 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 612 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 613 | active->devices.handles[j])); |
1da177e4 | 614 | } |
1cbf4c56 TR |
615 | continue; |
616 | } | |
617 | if (!active->flags.enabled) | |
618 | continue; | |
619 | /* | |
620 | * Below Threshold? | |
621 | * ---------------- | |
622 | * Turn OFF all cooling devices associated with this | |
623 | * threshold. | |
624 | */ | |
625 | for (j = 0; j < active->devices.count; j++) { | |
626 | result = acpi_bus_set_power(active->devices.handles[j], | |
627 | ACPI_STATE_D3); | |
628 | if (result) { | |
cece9296 LB |
629 | printk(KERN_WARNING PREFIX |
630 | "Unable to turn cooling device [%p] 'off'\n", | |
631 | active->devices.handles[j]); | |
1cbf4c56 TR |
632 | continue; |
633 | } | |
634 | active->flags.enabled = 0; | |
635 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
636 | "Cooling device [%p] now 'off'\n", | |
637 | active->devices.handles[j])); | |
1da177e4 LT |
638 | } |
639 | } | |
1da177e4 LT |
640 | } |
641 | ||
4be44fcd | 642 | static void acpi_thermal_check(void *context); |
1da177e4 | 643 | |
4be44fcd | 644 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
645 | { |
646 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
647 | if (!tz->zombie) | |
b8d35192 | 648 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
649 | } |
650 | ||
4be44fcd | 651 | static void acpi_thermal_check(void *data) |
1da177e4 | 652 | { |
4be44fcd | 653 | int result = 0; |
50dd0969 | 654 | struct acpi_thermal *tz = data; |
4be44fcd LB |
655 | unsigned long sleep_time = 0; |
656 | int i = 0; | |
1da177e4 LT |
657 | struct acpi_thermal_state state; |
658 | ||
1da177e4 LT |
659 | |
660 | if (!tz) { | |
6468463a | 661 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 662 | return; |
1da177e4 LT |
663 | } |
664 | ||
665 | state = tz->state; | |
666 | ||
667 | result = acpi_thermal_get_temperature(tz); | |
668 | if (result) | |
d550d98d | 669 | return; |
4be44fcd | 670 | |
1da177e4 | 671 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 672 | |
1da177e4 LT |
673 | /* |
674 | * Check Trip Points | |
675 | * ----------------- | |
676 | * Compare the current temperature to the trip point values to see | |
677 | * if we've entered one of the thermal policy states. Note that | |
678 | * this function determines when a state is entered, but the | |
679 | * individual policy decides when it is exited (e.g. hysteresis). | |
680 | */ | |
681 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
682 | state.critical |= |
683 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
684 | if (tz->trips.hot.flags.valid) |
685 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
686 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
687 | state.passive |= |
688 | (tz->temperature >= tz->trips.passive.temperature); | |
689 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 690 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
691 | state.active |= |
692 | (tz->temperature >= | |
693 | tz->trips.active[i].temperature); | |
1da177e4 LT |
694 | |
695 | /* | |
696 | * Invoke Policy | |
697 | * ------------- | |
698 | * Separated from the above check to allow individual policy to | |
699 | * determine when to exit a given state. | |
700 | */ | |
701 | if (state.critical) | |
702 | acpi_thermal_critical(tz); | |
703 | if (state.hot) | |
704 | acpi_thermal_hot(tz); | |
705 | if (state.passive) | |
706 | acpi_thermal_passive(tz); | |
707 | if (state.active) | |
708 | acpi_thermal_active(tz); | |
709 | ||
710 | /* | |
711 | * Calculate State | |
712 | * --------------- | |
713 | * Again, separated from the above two to allow independent policy | |
714 | * decisions. | |
715 | */ | |
1cbf4c56 TR |
716 | tz->state.critical = tz->trips.critical.flags.enabled; |
717 | tz->state.hot = tz->trips.hot.flags.enabled; | |
718 | tz->state.passive = tz->trips.passive.flags.enabled; | |
719 | tz->state.active = 0; | |
4be44fcd | 720 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 721 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
722 | |
723 | /* | |
724 | * Calculate Sleep Time | |
725 | * -------------------- | |
726 | * If we're in the passive state, use _TSP's value. Otherwise | |
727 | * use the default polling frequency (e.g. _TZP). If no polling | |
728 | * frequency is specified then we'll wait forever (at least until | |
729 | * a thermal event occurs). Note that _TSP and _TZD values are | |
730 | * given in 1/10th seconds (we must covert to milliseconds). | |
731 | */ | |
732 | if (tz->state.passive) | |
733 | sleep_time = tz->trips.passive.tsp * 100; | |
734 | else if (tz->polling_frequency > 0) | |
735 | sleep_time = tz->polling_frequency * 100; | |
736 | ||
4be44fcd LB |
737 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
738 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
739 | |
740 | /* | |
741 | * Schedule Next Poll | |
742 | * ------------------ | |
743 | */ | |
744 | if (!sleep_time) { | |
745 | if (timer_pending(&(tz->timer))) | |
746 | del_timer(&(tz->timer)); | |
4be44fcd | 747 | } else { |
1da177e4 | 748 | if (timer_pending(&(tz->timer))) |
94e22e13 AM |
749 | mod_timer(&(tz->timer), |
750 | jiffies + (HZ * sleep_time) / 1000); | |
1da177e4 | 751 | else { |
4be44fcd | 752 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
753 | tz->timer.function = acpi_thermal_run; |
754 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
755 | add_timer(&(tz->timer)); | |
756 | } | |
757 | } | |
758 | ||
d550d98d | 759 | return; |
1da177e4 LT |
760 | } |
761 | ||
1da177e4 LT |
762 | /* -------------------------------------------------------------------------- |
763 | FS Interface (/proc) | |
764 | -------------------------------------------------------------------------- */ | |
765 | ||
4be44fcd | 766 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
767 | |
768 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
769 | { | |
50dd0969 | 770 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 771 | |
1da177e4 LT |
772 | |
773 | if (!tz) | |
774 | goto end; | |
775 | ||
776 | seq_puts(seq, "state: "); | |
777 | ||
4be44fcd LB |
778 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
779 | && !tz->state.active) | |
1da177e4 LT |
780 | seq_puts(seq, "ok\n"); |
781 | else { | |
782 | if (tz->state.critical) | |
783 | seq_puts(seq, "critical "); | |
784 | if (tz->state.hot) | |
785 | seq_puts(seq, "hot "); | |
786 | if (tz->state.passive) | |
787 | seq_puts(seq, "passive "); | |
788 | if (tz->state.active) | |
789 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
790 | seq_puts(seq, "\n"); | |
791 | } | |
792 | ||
4be44fcd | 793 | end: |
d550d98d | 794 | return 0; |
1da177e4 LT |
795 | } |
796 | ||
797 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
798 | { | |
799 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
800 | } | |
801 | ||
1da177e4 LT |
802 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
803 | { | |
4be44fcd | 804 | int result = 0; |
50dd0969 | 805 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 806 | |
1da177e4 LT |
807 | |
808 | if (!tz) | |
809 | goto end; | |
810 | ||
811 | result = acpi_thermal_get_temperature(tz); | |
812 | if (result) | |
813 | goto end; | |
814 | ||
4be44fcd LB |
815 | seq_printf(seq, "temperature: %ld C\n", |
816 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 817 | |
4be44fcd | 818 | end: |
d550d98d | 819 | return 0; |
1da177e4 LT |
820 | } |
821 | ||
822 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
823 | { | |
824 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
825 | } | |
826 | ||
1da177e4 LT |
827 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
828 | { | |
50dd0969 | 829 | struct acpi_thermal *tz = seq->private; |
4be44fcd LB |
830 | int i = 0; |
831 | int j = 0; | |
1da177e4 | 832 | |
1da177e4 LT |
833 | |
834 | if (!tz) | |
835 | goto end; | |
836 | ||
837 | if (tz->trips.critical.flags.valid) | |
838 | seq_printf(seq, "critical (S5): %ld C\n", | |
4be44fcd | 839 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); |
1da177e4 LT |
840 | |
841 | if (tz->trips.hot.flags.valid) | |
842 | seq_printf(seq, "hot (S4): %ld C\n", | |
4be44fcd | 843 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); |
1da177e4 LT |
844 | |
845 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
846 | seq_printf(seq, |
847 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
848 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
849 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
850 | tz->trips.passive.tsp); | |
851 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
852 | ||
853 | seq_printf(seq, "0x%p ", | |
854 | tz->trips.passive.devices.handles[j]); | |
1da177e4 LT |
855 | } |
856 | seq_puts(seq, "\n"); | |
857 | } | |
858 | ||
859 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
860 | if (!(tz->trips.active[i].flags.valid)) | |
861 | break; | |
862 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
863 | i, |
864 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
865 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
1da177e4 | 866 | seq_printf(seq, "0x%p ", |
4be44fcd | 867 | tz->trips.active[i].devices.handles[j]); |
1da177e4 LT |
868 | seq_puts(seq, "\n"); |
869 | } | |
870 | ||
4be44fcd | 871 | end: |
d550d98d | 872 | return 0; |
1da177e4 LT |
873 | } |
874 | ||
875 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
876 | { | |
877 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
878 | } | |
879 | ||
1da177e4 LT |
880 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
881 | { | |
50dd0969 | 882 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 883 | |
1da177e4 LT |
884 | |
885 | if (!tz) | |
886 | goto end; | |
887 | ||
eaca2d3f | 888 | if (!tz->flags.cooling_mode) |
1da177e4 | 889 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 890 | else |
eaca2d3f | 891 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 892 | |
4be44fcd | 893 | end: |
d550d98d | 894 | return 0; |
1da177e4 LT |
895 | } |
896 | ||
897 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
898 | { | |
899 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 900 | PDE(inode)->data); |
1da177e4 LT |
901 | } |
902 | ||
903 | static ssize_t | |
4be44fcd LB |
904 | acpi_thermal_write_cooling_mode(struct file *file, |
905 | const char __user * buffer, | |
906 | size_t count, loff_t * ppos) | |
1da177e4 | 907 | { |
50dd0969 JE |
908 | struct seq_file *m = file->private_data; |
909 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
910 | int result = 0; |
911 | char mode_string[12] = { '\0' }; | |
1da177e4 | 912 | |
1da177e4 LT |
913 | |
914 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 915 | return -EINVAL; |
1da177e4 LT |
916 | |
917 | if (!tz->flags.cooling_mode) | |
d550d98d | 918 | return -ENODEV; |
1da177e4 LT |
919 | |
920 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 921 | return -EFAULT; |
4be44fcd | 922 | |
1da177e4 | 923 | mode_string[count] = '\0'; |
4be44fcd LB |
924 | |
925 | result = acpi_thermal_set_cooling_mode(tz, | |
926 | simple_strtoul(mode_string, NULL, | |
927 | 0)); | |
1da177e4 | 928 | if (result) |
d550d98d | 929 | return result; |
1da177e4 LT |
930 | |
931 | acpi_thermal_check(tz); | |
932 | ||
d550d98d | 933 | return count; |
1da177e4 LT |
934 | } |
935 | ||
1da177e4 LT |
936 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
937 | { | |
50dd0969 | 938 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 939 | |
1da177e4 LT |
940 | |
941 | if (!tz) | |
942 | goto end; | |
943 | ||
944 | if (!tz->polling_frequency) { | |
945 | seq_puts(seq, "<polling disabled>\n"); | |
946 | goto end; | |
947 | } | |
948 | ||
949 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 950 | (tz->polling_frequency / 10)); |
1da177e4 | 951 | |
4be44fcd | 952 | end: |
d550d98d | 953 | return 0; |
1da177e4 LT |
954 | } |
955 | ||
956 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
957 | { | |
958 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 959 | PDE(inode)->data); |
1da177e4 LT |
960 | } |
961 | ||
962 | static ssize_t | |
4be44fcd LB |
963 | acpi_thermal_write_polling(struct file *file, |
964 | const char __user * buffer, | |
965 | size_t count, loff_t * ppos) | |
1da177e4 | 966 | { |
50dd0969 JE |
967 | struct seq_file *m = file->private_data; |
968 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
969 | int result = 0; |
970 | char polling_string[12] = { '\0' }; | |
971 | int seconds = 0; | |
1da177e4 | 972 | |
1da177e4 LT |
973 | |
974 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 975 | return -EINVAL; |
4be44fcd | 976 | |
1da177e4 | 977 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 978 | return -EFAULT; |
4be44fcd | 979 | |
1da177e4 LT |
980 | polling_string[count] = '\0'; |
981 | ||
982 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 983 | |
1da177e4 LT |
984 | result = acpi_thermal_set_polling(tz, seconds); |
985 | if (result) | |
d550d98d | 986 | return result; |
1da177e4 LT |
987 | |
988 | acpi_thermal_check(tz); | |
989 | ||
d550d98d | 990 | return count; |
1da177e4 LT |
991 | } |
992 | ||
4be44fcd | 993 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 994 | { |
4be44fcd | 995 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 996 | |
1da177e4 LT |
997 | |
998 | if (!acpi_device_dir(device)) { | |
999 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1000 | acpi_thermal_dir); |
1da177e4 | 1001 | if (!acpi_device_dir(device)) |
d550d98d | 1002 | return -ENODEV; |
1da177e4 LT |
1003 | acpi_device_dir(device)->owner = THIS_MODULE; |
1004 | } | |
1005 | ||
1006 | /* 'state' [R] */ | |
1007 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1008 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1009 | if (!entry) |
d550d98d | 1010 | return -ENODEV; |
1da177e4 LT |
1011 | else { |
1012 | entry->proc_fops = &acpi_thermal_state_fops; | |
1013 | entry->data = acpi_driver_data(device); | |
1014 | entry->owner = THIS_MODULE; | |
1015 | } | |
1016 | ||
1017 | /* 'temperature' [R] */ | |
1018 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1019 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1020 | if (!entry) |
d550d98d | 1021 | return -ENODEV; |
1da177e4 LT |
1022 | else { |
1023 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1024 | entry->data = acpi_driver_data(device); | |
1025 | entry->owner = THIS_MODULE; | |
1026 | } | |
1027 | ||
1028 | /* 'trip_points' [R/W] */ | |
1029 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1030 | S_IFREG | S_IRUGO | S_IWUSR, |
1031 | acpi_device_dir(device)); | |
1da177e4 | 1032 | if (!entry) |
d550d98d | 1033 | return -ENODEV; |
1da177e4 LT |
1034 | else { |
1035 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1036 | entry->data = acpi_driver_data(device); | |
1037 | entry->owner = THIS_MODULE; | |
1038 | } | |
1039 | ||
1040 | /* 'cooling_mode' [R/W] */ | |
1041 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1042 | S_IFREG | S_IRUGO | S_IWUSR, |
1043 | acpi_device_dir(device)); | |
1da177e4 | 1044 | if (!entry) |
d550d98d | 1045 | return -ENODEV; |
1da177e4 LT |
1046 | else { |
1047 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1048 | entry->data = acpi_driver_data(device); | |
1049 | entry->owner = THIS_MODULE; | |
1050 | } | |
1051 | ||
1052 | /* 'polling_frequency' [R/W] */ | |
1053 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1054 | S_IFREG | S_IRUGO | S_IWUSR, |
1055 | acpi_device_dir(device)); | |
1da177e4 | 1056 | if (!entry) |
d550d98d | 1057 | return -ENODEV; |
1da177e4 LT |
1058 | else { |
1059 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1060 | entry->data = acpi_driver_data(device); | |
1061 | entry->owner = THIS_MODULE; | |
1062 | } | |
1063 | ||
d550d98d | 1064 | return 0; |
1da177e4 LT |
1065 | } |
1066 | ||
4be44fcd | 1067 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1068 | { |
1da177e4 LT |
1069 | |
1070 | if (acpi_device_dir(device)) { | |
1071 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1072 | acpi_device_dir(device)); | |
1073 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1074 | acpi_device_dir(device)); | |
1075 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1076 | acpi_device_dir(device)); | |
1077 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1078 | acpi_device_dir(device)); | |
1079 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1080 | acpi_device_dir(device)); | |
1081 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1082 | acpi_device_dir(device) = NULL; | |
1083 | } | |
1084 | ||
d550d98d | 1085 | return 0; |
1da177e4 LT |
1086 | } |
1087 | ||
1da177e4 LT |
1088 | /* -------------------------------------------------------------------------- |
1089 | Driver Interface | |
1090 | -------------------------------------------------------------------------- */ | |
1091 | ||
4be44fcd | 1092 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1093 | { |
50dd0969 | 1094 | struct acpi_thermal *tz = data; |
4be44fcd | 1095 | struct acpi_device *device = NULL; |
1da177e4 | 1096 | |
1da177e4 LT |
1097 | |
1098 | if (!tz) | |
d550d98d | 1099 | return; |
1da177e4 | 1100 | |
8348e1b1 | 1101 | device = tz->device; |
1da177e4 LT |
1102 | |
1103 | switch (event) { | |
1104 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1105 | acpi_thermal_check(tz); | |
1106 | break; | |
1107 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1108 | acpi_thermal_get_trip_points(tz); | |
1109 | acpi_thermal_check(tz); | |
1110 | acpi_bus_generate_event(device, event, 0); | |
1111 | break; | |
1112 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1113 | if (tz->flags.devices) | |
1114 | acpi_thermal_get_devices(tz); | |
1115 | acpi_bus_generate_event(device, event, 0); | |
1116 | break; | |
1117 | default: | |
1118 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1119 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1120 | break; |
1121 | } | |
1122 | ||
d550d98d | 1123 | return; |
1da177e4 LT |
1124 | } |
1125 | ||
4be44fcd | 1126 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1127 | { |
4be44fcd | 1128 | int result = 0; |
1da177e4 | 1129 | |
1da177e4 LT |
1130 | |
1131 | if (!tz) | |
d550d98d | 1132 | return -EINVAL; |
1da177e4 LT |
1133 | |
1134 | /* Get temperature [_TMP] (required) */ | |
1135 | result = acpi_thermal_get_temperature(tz); | |
1136 | if (result) | |
d550d98d | 1137 | return result; |
1da177e4 LT |
1138 | |
1139 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1140 | result = acpi_thermal_get_trip_points(tz); | |
1141 | if (result) | |
d550d98d | 1142 | return result; |
1da177e4 LT |
1143 | |
1144 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1145 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1146 | if (!result) |
1da177e4 | 1147 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1148 | |
1149 | /* Get default polling frequency [_TZP] (optional) */ | |
1150 | if (tzp) | |
1151 | tz->polling_frequency = tzp; | |
1152 | else | |
1153 | acpi_thermal_get_polling_frequency(tz); | |
1154 | ||
1155 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1156 | result = acpi_thermal_get_devices(tz); | |
1157 | if (!result) | |
1158 | tz->flags.devices = 1; | |
1159 | ||
d550d98d | 1160 | return 0; |
1da177e4 LT |
1161 | } |
1162 | ||
4be44fcd | 1163 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1164 | { |
4be44fcd LB |
1165 | int result = 0; |
1166 | acpi_status status = AE_OK; | |
1167 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1168 | |
1da177e4 LT |
1169 | |
1170 | if (!device) | |
d550d98d | 1171 | return -EINVAL; |
1da177e4 | 1172 | |
36bcbec7 | 1173 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1174 | if (!tz) |
d550d98d | 1175 | return -ENOMEM; |
1da177e4 | 1176 | |
8348e1b1 | 1177 | tz->device = device; |
1da177e4 LT |
1178 | strcpy(tz->name, device->pnp.bus_id); |
1179 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1180 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1181 | acpi_driver_data(device) = tz; | |
1182 | ||
1183 | result = acpi_thermal_get_info(tz); | |
1184 | if (result) | |
1185 | goto end; | |
1186 | ||
1187 | result = acpi_thermal_add_fs(device); | |
1188 | if (result) | |
09047e75 | 1189 | goto end; |
1da177e4 LT |
1190 | |
1191 | init_timer(&tz->timer); | |
1192 | ||
1193 | acpi_thermal_check(tz); | |
1194 | ||
38ba7c9e | 1195 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1196 | ACPI_DEVICE_NOTIFY, |
1197 | acpi_thermal_notify, tz); | |
1da177e4 | 1198 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1199 | result = -ENODEV; |
1200 | goto end; | |
1201 | } | |
1202 | ||
1203 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1204 | acpi_device_name(device), acpi_device_bid(device), |
1205 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1206 | |
4be44fcd | 1207 | end: |
1da177e4 LT |
1208 | if (result) { |
1209 | acpi_thermal_remove_fs(device); | |
1210 | kfree(tz); | |
1211 | } | |
1212 | ||
d550d98d | 1213 | return result; |
1da177e4 LT |
1214 | } |
1215 | ||
4be44fcd | 1216 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1217 | { |
4be44fcd LB |
1218 | acpi_status status = AE_OK; |
1219 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1220 | |
1da177e4 LT |
1221 | |
1222 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1223 | return -EINVAL; |
1da177e4 | 1224 | |
50dd0969 | 1225 | tz = acpi_driver_data(device); |
1da177e4 LT |
1226 | |
1227 | /* avoid timer adding new defer task */ | |
1228 | tz->zombie = 1; | |
1229 | /* wait for running timer (on other CPUs) finish */ | |
1230 | del_timer_sync(&(tz->timer)); | |
1231 | /* synchronize deferred task */ | |
1232 | acpi_os_wait_events_complete(NULL); | |
1233 | /* deferred task may reinsert timer */ | |
1234 | del_timer_sync(&(tz->timer)); | |
1235 | ||
38ba7c9e | 1236 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1237 | ACPI_DEVICE_NOTIFY, |
1238 | acpi_thermal_notify); | |
1da177e4 LT |
1239 | |
1240 | /* Terminate policy */ | |
4be44fcd | 1241 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1242 | tz->trips.passive.flags.enabled = 0; |
1243 | acpi_thermal_passive(tz); | |
1244 | } | |
1245 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1246 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1247 | tz->trips.active[0].flags.enabled = 0; |
1248 | acpi_thermal_active(tz); | |
1249 | } | |
1250 | ||
1251 | acpi_thermal_remove_fs(device); | |
1252 | ||
1253 | kfree(tz); | |
d550d98d | 1254 | return 0; |
1da177e4 LT |
1255 | } |
1256 | ||
5d9464a4 | 1257 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1258 | { |
1259 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1260 | int i, j, power_state, result; |
1261 | ||
74ce1468 KK |
1262 | |
1263 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1264 | return -EINVAL; |
74ce1468 | 1265 | |
50dd0969 | 1266 | tz = acpi_driver_data(device); |
74ce1468 | 1267 | |
bed936f7 | 1268 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1269 | if (!(&tz->trips.active[i])) |
1270 | break; | |
1271 | if (!tz->trips.active[i].flags.valid) | |
1272 | break; | |
1273 | tz->trips.active[i].flags.enabled = 1; | |
1274 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1275 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1276 | handles[j], &power_state); | |
1277 | if (result || (power_state != ACPI_STATE_D0)) { | |
1278 | tz->trips.active[i].flags.enabled = 0; | |
1279 | break; | |
1280 | } | |
bed936f7 | 1281 | } |
b1028c54 | 1282 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1283 | } |
1284 | ||
b1028c54 | 1285 | acpi_thermal_check(tz); |
74ce1468 KK |
1286 | |
1287 | return AE_OK; | |
1288 | } | |
1289 | ||
4be44fcd | 1290 | static int __init acpi_thermal_init(void) |
1da177e4 | 1291 | { |
4be44fcd | 1292 | int result = 0; |
1da177e4 | 1293 | |
1da177e4 LT |
1294 | |
1295 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1296 | if (!acpi_thermal_dir) | |
d550d98d | 1297 | return -ENODEV; |
1da177e4 LT |
1298 | acpi_thermal_dir->owner = THIS_MODULE; |
1299 | ||
1300 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1301 | if (result < 0) { | |
1302 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1303 | return -ENODEV; |
1da177e4 LT |
1304 | } |
1305 | ||
d550d98d | 1306 | return 0; |
1da177e4 LT |
1307 | } |
1308 | ||
4be44fcd | 1309 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1310 | { |
1da177e4 LT |
1311 | |
1312 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1313 | ||
1314 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1315 | ||
d550d98d | 1316 | return; |
1da177e4 LT |
1317 | } |
1318 | ||
1da177e4 LT |
1319 | module_init(acpi_thermal_init); |
1320 | module_exit(acpi_thermal_exit); |