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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> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/kmod.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
44 | #include <acpi/acpi_bus.h> | |
45 | #include <acpi/acpi_drivers.h> | |
46 | ||
47 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
48 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
49 | #define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver" | |
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 | |
62 | #define ACPI_THERMAL_MODE_PASSIVE 0x01 | |
63 | #define ACPI_THERMAL_MODE_CRITICAL 0xff | |
64 | #define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" | |
65 | ||
66 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
67 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
68 | ||
69 | #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) | |
70 | #define CELSIUS_TO_KELVIN(t) ((t+273)*10) | |
71 | ||
72 | #define _COMPONENT ACPI_THERMAL_COMPONENT | |
4be44fcd | 73 | ACPI_MODULE_NAME("acpi_thermal") |
1da177e4 | 74 | |
1cbf4c56 | 75 | MODULE_AUTHOR("Paul Diefenbaugh"); |
1da177e4 LT |
76 | MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME); |
77 | MODULE_LICENSE("GPL"); | |
78 | ||
79 | static int tzp; | |
80 | module_param(tzp, int, 0); | |
81 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); | |
82 | ||
4be44fcd LB |
83 | static int acpi_thermal_add(struct acpi_device *device); |
84 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
74ce1468 | 85 | static int acpi_thermal_resume(struct acpi_device *device, int state); |
1da177e4 LT |
86 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
87 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
88 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
4be44fcd LB |
89 | static ssize_t acpi_thermal_write_trip_points(struct file *, |
90 | const char __user *, size_t, | |
91 | loff_t *); | |
1da177e4 | 92 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
93 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
94 | const char __user *, size_t, | |
95 | loff_t *); | |
1da177e4 | 96 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
97 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
98 | size_t, loff_t *); | |
1da177e4 LT |
99 | |
100 | static struct acpi_driver acpi_thermal_driver = { | |
4be44fcd LB |
101 | .name = ACPI_THERMAL_DRIVER_NAME, |
102 | .class = ACPI_THERMAL_CLASS, | |
103 | .ids = ACPI_THERMAL_HID, | |
104 | .ops = { | |
105 | .add = acpi_thermal_add, | |
106 | .remove = acpi_thermal_remove, | |
74ce1468 | 107 | .resume = acpi_thermal_resume, |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | struct acpi_thermal_state { | |
4be44fcd LB |
112 | u8 critical:1; |
113 | u8 hot:1; | |
114 | u8 passive:1; | |
115 | u8 active:1; | |
116 | u8 reserved:4; | |
117 | int active_index; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
121 | u8 valid:1; |
122 | u8 enabled:1; | |
123 | u8 reserved:6; | |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_thermal_critical { | |
127 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 128 | unsigned long temperature; |
1da177e4 LT |
129 | }; |
130 | ||
131 | struct acpi_thermal_hot { | |
132 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 133 | unsigned long temperature; |
1da177e4 LT |
134 | }; |
135 | ||
136 | struct acpi_thermal_passive { | |
137 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
138 | unsigned long temperature; |
139 | unsigned long tc1; | |
140 | unsigned long tc2; | |
141 | unsigned long tsp; | |
142 | struct acpi_handle_list devices; | |
1da177e4 LT |
143 | }; |
144 | ||
145 | struct acpi_thermal_active { | |
146 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
147 | unsigned long temperature; |
148 | struct acpi_handle_list devices; | |
1da177e4 LT |
149 | }; |
150 | ||
151 | struct acpi_thermal_trips { | |
152 | struct acpi_thermal_critical critical; | |
4be44fcd | 153 | struct acpi_thermal_hot hot; |
1da177e4 LT |
154 | struct acpi_thermal_passive passive; |
155 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
156 | }; | |
157 | ||
158 | struct acpi_thermal_flags { | |
4be44fcd LB |
159 | u8 cooling_mode:1; /* _SCP */ |
160 | u8 devices:1; /* _TZD */ | |
161 | u8 reserved:6; | |
1da177e4 LT |
162 | }; |
163 | ||
164 | struct acpi_thermal { | |
4be44fcd | 165 | acpi_handle handle; |
8348e1b1 | 166 | struct acpi_device * device; |
4be44fcd LB |
167 | acpi_bus_id name; |
168 | unsigned long temperature; | |
169 | unsigned long last_temperature; | |
170 | unsigned long polling_frequency; | |
171 | u8 cooling_mode; | |
172 | volatile u8 zombie; | |
1da177e4 LT |
173 | struct acpi_thermal_flags flags; |
174 | struct acpi_thermal_state state; | |
175 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
176 | struct acpi_handle_list devices; |
177 | struct timer_list timer; | |
1da177e4 LT |
178 | }; |
179 | ||
180 | static struct file_operations acpi_thermal_state_fops = { | |
4be44fcd LB |
181 | .open = acpi_thermal_state_open_fs, |
182 | .read = seq_read, | |
183 | .llseek = seq_lseek, | |
184 | .release = single_release, | |
1da177e4 LT |
185 | }; |
186 | ||
187 | static struct file_operations acpi_thermal_temp_fops = { | |
4be44fcd LB |
188 | .open = acpi_thermal_temp_open_fs, |
189 | .read = seq_read, | |
190 | .llseek = seq_lseek, | |
191 | .release = single_release, | |
1da177e4 LT |
192 | }; |
193 | ||
194 | static struct file_operations acpi_thermal_trip_fops = { | |
4be44fcd LB |
195 | .open = acpi_thermal_trip_open_fs, |
196 | .read = seq_read, | |
197 | .write = acpi_thermal_write_trip_points, | |
198 | .llseek = seq_lseek, | |
199 | .release = single_release, | |
1da177e4 LT |
200 | }; |
201 | ||
202 | static struct file_operations acpi_thermal_cooling_fops = { | |
4be44fcd LB |
203 | .open = acpi_thermal_cooling_open_fs, |
204 | .read = seq_read, | |
205 | .write = acpi_thermal_write_cooling_mode, | |
206 | .llseek = seq_lseek, | |
207 | .release = single_release, | |
1da177e4 LT |
208 | }; |
209 | ||
210 | static struct file_operations acpi_thermal_polling_fops = { | |
4be44fcd LB |
211 | .open = acpi_thermal_polling_open_fs, |
212 | .read = seq_read, | |
213 | .write = acpi_thermal_write_polling, | |
214 | .llseek = seq_lseek, | |
215 | .release = single_release, | |
1da177e4 LT |
216 | }; |
217 | ||
218 | /* -------------------------------------------------------------------------- | |
219 | Thermal Zone Management | |
220 | -------------------------------------------------------------------------- */ | |
221 | ||
4be44fcd | 222 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 223 | { |
4be44fcd | 224 | acpi_status status = AE_OK; |
1da177e4 | 225 | |
1da177e4 LT |
226 | |
227 | if (!tz) | |
d550d98d | 228 | return -EINVAL; |
1da177e4 LT |
229 | |
230 | tz->last_temperature = tz->temperature; | |
231 | ||
4be44fcd LB |
232 | status = |
233 | acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); | |
1da177e4 | 234 | if (ACPI_FAILURE(status)) |
d550d98d | 235 | return -ENODEV; |
1da177e4 | 236 | |
4be44fcd LB |
237 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
238 | tz->temperature)); | |
1da177e4 | 239 | |
d550d98d | 240 | return 0; |
1da177e4 LT |
241 | } |
242 | ||
4be44fcd | 243 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 244 | { |
4be44fcd | 245 | acpi_status status = AE_OK; |
1da177e4 | 246 | |
1da177e4 LT |
247 | |
248 | if (!tz) | |
d550d98d | 249 | return -EINVAL; |
1da177e4 | 250 | |
4be44fcd LB |
251 | status = |
252 | acpi_evaluate_integer(tz->handle, "_TZP", NULL, | |
253 | &tz->polling_frequency); | |
1da177e4 | 254 | if (ACPI_FAILURE(status)) |
d550d98d | 255 | return -ENODEV; |
1da177e4 | 256 | |
4be44fcd LB |
257 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
258 | tz->polling_frequency)); | |
1da177e4 | 259 | |
d550d98d | 260 | return 0; |
1da177e4 LT |
261 | } |
262 | ||
4be44fcd | 263 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 264 | { |
1da177e4 LT |
265 | |
266 | if (!tz) | |
d550d98d | 267 | return -EINVAL; |
1da177e4 LT |
268 | |
269 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
270 | ||
4be44fcd LB |
271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
272 | "Polling frequency set to %lu seconds\n", | |
273 | tz->polling_frequency)); | |
1da177e4 | 274 | |
d550d98d | 275 | return 0; |
1da177e4 LT |
276 | } |
277 | ||
4be44fcd | 278 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 279 | { |
4be44fcd LB |
280 | acpi_status status = AE_OK; |
281 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
282 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
283 | acpi_handle handle = NULL; | |
1da177e4 | 284 | |
1da177e4 LT |
285 | |
286 | if (!tz) | |
d550d98d | 287 | return -EINVAL; |
1da177e4 LT |
288 | |
289 | status = acpi_get_handle(tz->handle, "_SCP", &handle); | |
290 | if (ACPI_FAILURE(status)) { | |
291 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 292 | return -ENODEV; |
1da177e4 LT |
293 | } |
294 | ||
295 | arg0.integer.value = mode; | |
296 | ||
297 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
298 | if (ACPI_FAILURE(status)) | |
d550d98d | 299 | return -ENODEV; |
1da177e4 LT |
300 | |
301 | tz->cooling_mode = mode; | |
302 | ||
4be44fcd LB |
303 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", |
304 | mode ? "passive" : "active")); | |
1da177e4 | 305 | |
d550d98d | 306 | return 0; |
1da177e4 LT |
307 | } |
308 | ||
4be44fcd | 309 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 310 | { |
4be44fcd LB |
311 | acpi_status status = AE_OK; |
312 | int i = 0; | |
1da177e4 | 313 | |
1da177e4 LT |
314 | |
315 | if (!tz) | |
d550d98d | 316 | return -EINVAL; |
1da177e4 LT |
317 | |
318 | /* Critical Shutdown (required) */ | |
319 | ||
4be44fcd LB |
320 | status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, |
321 | &tz->trips.critical.temperature); | |
1da177e4 LT |
322 | if (ACPI_FAILURE(status)) { |
323 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 324 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 325 | return -ENODEV; |
4be44fcd | 326 | } else { |
1da177e4 | 327 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
328 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
329 | "Found critical threshold [%lu]\n", | |
330 | tz->trips.critical.temperature)); | |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Critical Sleep (optional) */ | |
334 | ||
4be44fcd LB |
335 | status = |
336 | acpi_evaluate_integer(tz->handle, "_HOT", NULL, | |
337 | &tz->trips.hot.temperature); | |
1da177e4 LT |
338 | if (ACPI_FAILURE(status)) { |
339 | tz->trips.hot.flags.valid = 0; | |
340 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 341 | } else { |
1da177e4 | 342 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
343 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
344 | tz->trips.hot.temperature)); | |
1da177e4 LT |
345 | } |
346 | ||
347 | /* Passive: Processors (optional) */ | |
348 | ||
4be44fcd LB |
349 | status = |
350 | acpi_evaluate_integer(tz->handle, "_PSV", NULL, | |
351 | &tz->trips.passive.temperature); | |
1da177e4 LT |
352 | if (ACPI_FAILURE(status)) { |
353 | tz->trips.passive.flags.valid = 0; | |
354 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 355 | } else { |
1da177e4 LT |
356 | tz->trips.passive.flags.valid = 1; |
357 | ||
4be44fcd LB |
358 | status = |
359 | acpi_evaluate_integer(tz->handle, "_TC1", NULL, | |
360 | &tz->trips.passive.tc1); | |
1da177e4 LT |
361 | if (ACPI_FAILURE(status)) |
362 | tz->trips.passive.flags.valid = 0; | |
363 | ||
4be44fcd LB |
364 | status = |
365 | acpi_evaluate_integer(tz->handle, "_TC2", NULL, | |
366 | &tz->trips.passive.tc2); | |
1da177e4 LT |
367 | if (ACPI_FAILURE(status)) |
368 | tz->trips.passive.flags.valid = 0; | |
369 | ||
4be44fcd LB |
370 | status = |
371 | acpi_evaluate_integer(tz->handle, "_TSP", NULL, | |
372 | &tz->trips.passive.tsp); | |
1da177e4 LT |
373 | if (ACPI_FAILURE(status)) |
374 | tz->trips.passive.flags.valid = 0; | |
375 | ||
4be44fcd LB |
376 | status = |
377 | acpi_evaluate_reference(tz->handle, "_PSL", NULL, | |
378 | &tz->trips.passive.devices); | |
1da177e4 LT |
379 | if (ACPI_FAILURE(status)) |
380 | tz->trips.passive.flags.valid = 0; | |
381 | ||
382 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 383 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 384 | else |
4be44fcd LB |
385 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
386 | "Found passive threshold [%lu]\n", | |
387 | tz->trips.passive.temperature)); | |
1da177e4 LT |
388 | } |
389 | ||
390 | /* Active: Fans, etc. (optional) */ | |
391 | ||
4be44fcd | 392 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 393 | |
4be44fcd | 394 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 395 | |
4be44fcd LB |
396 | status = |
397 | acpi_evaluate_integer(tz->handle, name, NULL, | |
398 | &tz->trips.active[i].temperature); | |
1da177e4 LT |
399 | if (ACPI_FAILURE(status)) |
400 | break; | |
401 | ||
402 | name[2] = 'L'; | |
4be44fcd LB |
403 | status = |
404 | acpi_evaluate_reference(tz->handle, name, NULL, | |
405 | &tz->trips.active[i].devices); | |
1da177e4 LT |
406 | if (ACPI_SUCCESS(status)) { |
407 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
408 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
409 | "Found active threshold [%d]:[%lu]\n", | |
410 | i, tz->trips.active[i].temperature)); | |
411 | } else | |
a6fc6720 TR |
412 | ACPI_EXCEPTION((AE_INFO, status, |
413 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
414 | } |
415 | ||
d550d98d | 416 | return 0; |
1da177e4 LT |
417 | } |
418 | ||
4be44fcd | 419 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 420 | { |
4be44fcd | 421 | acpi_status status = AE_OK; |
1da177e4 | 422 | |
1da177e4 LT |
423 | |
424 | if (!tz) | |
d550d98d | 425 | return -EINVAL; |
1da177e4 | 426 | |
4be44fcd LB |
427 | status = |
428 | acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); | |
1da177e4 | 429 | if (ACPI_FAILURE(status)) |
d550d98d | 430 | return -ENODEV; |
1da177e4 | 431 | |
d550d98d | 432 | return 0; |
1da177e4 LT |
433 | } |
434 | ||
4be44fcd | 435 | static int acpi_thermal_call_usermode(char *path) |
1da177e4 | 436 | { |
4be44fcd LB |
437 | char *argv[2] = { NULL, NULL }; |
438 | char *envp[3] = { NULL, NULL, NULL }; | |
1da177e4 | 439 | |
1da177e4 LT |
440 | |
441 | if (!path) | |
d550d98d | 442 | return -EINVAL; |
1da177e4 LT |
443 | |
444 | argv[0] = path; | |
445 | ||
446 | /* minimal command environment */ | |
447 | envp[0] = "HOME=/"; | |
448 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
4be44fcd | 449 | |
1da177e4 LT |
450 | call_usermodehelper(argv[0], argv, envp, 0); |
451 | ||
d550d98d | 452 | return 0; |
1da177e4 LT |
453 | } |
454 | ||
4be44fcd | 455 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 456 | { |
1da177e4 | 457 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 458 | return -EINVAL; |
1da177e4 LT |
459 | |
460 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 461 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 462 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 463 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
464 | tz->trips.critical.flags.enabled = 0; |
465 | ||
4be44fcd LB |
466 | printk(KERN_EMERG |
467 | "Critical temperature reached (%ld C), shutting down.\n", | |
468 | KELVIN_TO_CELSIUS(tz->temperature)); | |
8348e1b1 | 469 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 470 | tz->trips.critical.flags.enabled); |
1da177e4 LT |
471 | |
472 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
473 | ||
d550d98d | 474 | return 0; |
1da177e4 LT |
475 | } |
476 | ||
4be44fcd | 477 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 478 | { |
1da177e4 | 479 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 480 | return -EINVAL; |
1da177e4 LT |
481 | |
482 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 483 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 484 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 485 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
486 | tz->trips.hot.flags.enabled = 0; |
487 | ||
8348e1b1 | 488 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 489 | tz->trips.hot.flags.enabled); |
1da177e4 LT |
490 | |
491 | /* TBD: Call user-mode "sleep(S4)" function */ | |
492 | ||
d550d98d | 493 | return 0; |
1da177e4 LT |
494 | } |
495 | ||
1cbf4c56 | 496 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 497 | { |
1cbf4c56 | 498 | int result = 1; |
1da177e4 | 499 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
500 | int trend = 0; |
501 | int i = 0; | |
1da177e4 | 502 | |
1da177e4 LT |
503 | |
504 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 505 | return; |
1da177e4 LT |
506 | |
507 | passive = &(tz->trips.passive); | |
508 | ||
509 | /* | |
510 | * Above Trip? | |
511 | * ----------- | |
512 | * Calculate the thermal trend (using the passive cooling equation) | |
513 | * and modify the performance limit for all passive cooling devices | |
514 | * accordingly. Note that we assume symmetry. | |
515 | */ | |
516 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
517 | trend = |
518 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
519 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
520 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
521 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
522 | trend, passive->tc1, tz->temperature, | |
523 | tz->last_temperature, passive->tc2, | |
524 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 525 | passive->flags.enabled = 1; |
1da177e4 LT |
526 | /* Heating up? */ |
527 | if (trend > 0) | |
4be44fcd LB |
528 | for (i = 0; i < passive->devices.count; i++) |
529 | acpi_processor_set_thermal_limit(passive-> | |
530 | devices. | |
531 | handles[i], | |
532 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 533 | /* Cooling off? */ |
1cbf4c56 | 534 | else if (trend < 0) { |
4be44fcd | 535 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
536 | /* |
537 | * assume that we are on highest | |
538 | * freq/lowest thrott and can leave | |
539 | * passive mode, even in error case | |
540 | */ | |
541 | if (!acpi_processor_set_thermal_limit | |
542 | (passive->devices.handles[i], | |
543 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
544 | result = 0; | |
545 | /* | |
546 | * Leave cooling mode, even if the temp might | |
547 | * higher than trip point This is because some | |
548 | * machines might have long thermal polling | |
549 | * frequencies (tsp) defined. We will fall back | |
550 | * into passive mode in next cycle (probably quicker) | |
551 | */ | |
552 | if (result) { | |
553 | passive->flags.enabled = 0; | |
554 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
555 | "Disabling passive cooling, still above threshold," | |
556 | " but we are cooling down\n")); | |
557 | } | |
558 | } | |
559 | return; | |
1da177e4 LT |
560 | } |
561 | ||
562 | /* | |
563 | * Below Trip? | |
564 | * ----------- | |
565 | * Implement passive cooling hysteresis to slowly increase performance | |
566 | * and avoid thrashing around the passive trip point. Note that we | |
567 | * assume symmetry. | |
568 | */ | |
1cbf4c56 TR |
569 | if (!passive->flags.enabled) |
570 | return; | |
571 | for (i = 0; i < passive->devices.count; i++) | |
572 | if (!acpi_processor_set_thermal_limit | |
573 | (passive->devices.handles[i], | |
574 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
575 | result = 0; | |
576 | if (result) { | |
577 | passive->flags.enabled = 0; | |
578 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
579 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 580 | } |
1da177e4 LT |
581 | } |
582 | ||
1cbf4c56 | 583 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 584 | { |
4be44fcd | 585 | int result = 0; |
1da177e4 | 586 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
587 | int i = 0; |
588 | int j = 0; | |
589 | unsigned long maxtemp = 0; | |
1da177e4 | 590 | |
1da177e4 LT |
591 | |
592 | if (!tz) | |
1cbf4c56 | 593 | return; |
1da177e4 | 594 | |
4be44fcd | 595 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
596 | active = &(tz->trips.active[i]); |
597 | if (!active || !active->flags.valid) | |
598 | break; | |
1da177e4 | 599 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
600 | /* |
601 | * Above Threshold? | |
602 | * ---------------- | |
603 | * If not already enabled, turn ON all cooling devices | |
604 | * associated with this active threshold. | |
605 | */ | |
1da177e4 | 606 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
607 | tz->state.active_index = i; |
608 | maxtemp = active->temperature; | |
609 | if (active->flags.enabled) | |
610 | continue; | |
1da177e4 | 611 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
612 | result = |
613 | acpi_bus_set_power(active->devices. | |
614 | handles[j], | |
1cbf4c56 | 615 | ACPI_STATE_D0); |
1da177e4 | 616 | if (result) { |
cece9296 LB |
617 | printk(KERN_WARNING PREFIX |
618 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 619 | active->devices. |
cece9296 | 620 | handles[j]); |
1da177e4 LT |
621 | continue; |
622 | } | |
1cbf4c56 | 623 | active->flags.enabled = 1; |
4be44fcd | 624 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 625 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 626 | active->devices.handles[j])); |
1da177e4 | 627 | } |
1cbf4c56 TR |
628 | continue; |
629 | } | |
630 | if (!active->flags.enabled) | |
631 | continue; | |
632 | /* | |
633 | * Below Threshold? | |
634 | * ---------------- | |
635 | * Turn OFF all cooling devices associated with this | |
636 | * threshold. | |
637 | */ | |
638 | for (j = 0; j < active->devices.count; j++) { | |
639 | result = acpi_bus_set_power(active->devices.handles[j], | |
640 | ACPI_STATE_D3); | |
641 | if (result) { | |
cece9296 LB |
642 | printk(KERN_WARNING PREFIX |
643 | "Unable to turn cooling device [%p] 'off'\n", | |
644 | active->devices.handles[j]); | |
1cbf4c56 TR |
645 | continue; |
646 | } | |
647 | active->flags.enabled = 0; | |
648 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
649 | "Cooling device [%p] now 'off'\n", | |
650 | active->devices.handles[j])); | |
1da177e4 LT |
651 | } |
652 | } | |
1da177e4 LT |
653 | } |
654 | ||
4be44fcd | 655 | static void acpi_thermal_check(void *context); |
1da177e4 | 656 | |
4be44fcd | 657 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
658 | { |
659 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
660 | if (!tz->zombie) | |
b8d35192 | 661 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
662 | } |
663 | ||
4be44fcd | 664 | static void acpi_thermal_check(void *data) |
1da177e4 | 665 | { |
4be44fcd LB |
666 | int result = 0; |
667 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
668 | unsigned long sleep_time = 0; | |
669 | int i = 0; | |
1da177e4 LT |
670 | struct acpi_thermal_state state; |
671 | ||
1da177e4 LT |
672 | |
673 | if (!tz) { | |
6468463a | 674 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 675 | return; |
1da177e4 LT |
676 | } |
677 | ||
678 | state = tz->state; | |
679 | ||
680 | result = acpi_thermal_get_temperature(tz); | |
681 | if (result) | |
d550d98d | 682 | return; |
4be44fcd | 683 | |
1da177e4 | 684 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 685 | |
1da177e4 LT |
686 | /* |
687 | * Check Trip Points | |
688 | * ----------------- | |
689 | * Compare the current temperature to the trip point values to see | |
690 | * if we've entered one of the thermal policy states. Note that | |
691 | * this function determines when a state is entered, but the | |
692 | * individual policy decides when it is exited (e.g. hysteresis). | |
693 | */ | |
694 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
695 | state.critical |= |
696 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
697 | if (tz->trips.hot.flags.valid) |
698 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
699 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
700 | state.passive |= |
701 | (tz->temperature >= tz->trips.passive.temperature); | |
702 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 703 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
704 | state.active |= |
705 | (tz->temperature >= | |
706 | tz->trips.active[i].temperature); | |
1da177e4 LT |
707 | |
708 | /* | |
709 | * Invoke Policy | |
710 | * ------------- | |
711 | * Separated from the above check to allow individual policy to | |
712 | * determine when to exit a given state. | |
713 | */ | |
714 | if (state.critical) | |
715 | acpi_thermal_critical(tz); | |
716 | if (state.hot) | |
717 | acpi_thermal_hot(tz); | |
718 | if (state.passive) | |
719 | acpi_thermal_passive(tz); | |
720 | if (state.active) | |
721 | acpi_thermal_active(tz); | |
722 | ||
723 | /* | |
724 | * Calculate State | |
725 | * --------------- | |
726 | * Again, separated from the above two to allow independent policy | |
727 | * decisions. | |
728 | */ | |
1cbf4c56 TR |
729 | tz->state.critical = tz->trips.critical.flags.enabled; |
730 | tz->state.hot = tz->trips.hot.flags.enabled; | |
731 | tz->state.passive = tz->trips.passive.flags.enabled; | |
732 | tz->state.active = 0; | |
4be44fcd | 733 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 734 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
735 | |
736 | /* | |
737 | * Calculate Sleep Time | |
738 | * -------------------- | |
739 | * If we're in the passive state, use _TSP's value. Otherwise | |
740 | * use the default polling frequency (e.g. _TZP). If no polling | |
741 | * frequency is specified then we'll wait forever (at least until | |
742 | * a thermal event occurs). Note that _TSP and _TZD values are | |
743 | * given in 1/10th seconds (we must covert to milliseconds). | |
744 | */ | |
745 | if (tz->state.passive) | |
746 | sleep_time = tz->trips.passive.tsp * 100; | |
747 | else if (tz->polling_frequency > 0) | |
748 | sleep_time = tz->polling_frequency * 100; | |
749 | ||
4be44fcd LB |
750 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
751 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
752 | |
753 | /* | |
754 | * Schedule Next Poll | |
755 | * ------------------ | |
756 | */ | |
757 | if (!sleep_time) { | |
758 | if (timer_pending(&(tz->timer))) | |
759 | del_timer(&(tz->timer)); | |
4be44fcd | 760 | } else { |
1da177e4 LT |
761 | if (timer_pending(&(tz->timer))) |
762 | mod_timer(&(tz->timer), (HZ * sleep_time) / 1000); | |
763 | else { | |
4be44fcd | 764 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
765 | tz->timer.function = acpi_thermal_run; |
766 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
767 | add_timer(&(tz->timer)); | |
768 | } | |
769 | } | |
770 | ||
d550d98d | 771 | return; |
1da177e4 LT |
772 | } |
773 | ||
1da177e4 LT |
774 | /* -------------------------------------------------------------------------- |
775 | FS Interface (/proc) | |
776 | -------------------------------------------------------------------------- */ | |
777 | ||
4be44fcd | 778 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
779 | |
780 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
781 | { | |
4be44fcd | 782 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 783 | |
1da177e4 LT |
784 | |
785 | if (!tz) | |
786 | goto end; | |
787 | ||
788 | seq_puts(seq, "state: "); | |
789 | ||
4be44fcd LB |
790 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
791 | && !tz->state.active) | |
1da177e4 LT |
792 | seq_puts(seq, "ok\n"); |
793 | else { | |
794 | if (tz->state.critical) | |
795 | seq_puts(seq, "critical "); | |
796 | if (tz->state.hot) | |
797 | seq_puts(seq, "hot "); | |
798 | if (tz->state.passive) | |
799 | seq_puts(seq, "passive "); | |
800 | if (tz->state.active) | |
801 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
802 | seq_puts(seq, "\n"); | |
803 | } | |
804 | ||
4be44fcd | 805 | end: |
d550d98d | 806 | return 0; |
1da177e4 LT |
807 | } |
808 | ||
809 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
810 | { | |
811 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
812 | } | |
813 | ||
1da177e4 LT |
814 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
815 | { | |
4be44fcd LB |
816 | int result = 0; |
817 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
1da177e4 | 818 | |
1da177e4 LT |
819 | |
820 | if (!tz) | |
821 | goto end; | |
822 | ||
823 | result = acpi_thermal_get_temperature(tz); | |
824 | if (result) | |
825 | goto end; | |
826 | ||
4be44fcd LB |
827 | seq_printf(seq, "temperature: %ld C\n", |
828 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 829 | |
4be44fcd | 830 | end: |
d550d98d | 831 | return 0; |
1da177e4 LT |
832 | } |
833 | ||
834 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
835 | { | |
836 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
837 | } | |
838 | ||
1da177e4 LT |
839 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
840 | { | |
4be44fcd LB |
841 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
842 | int i = 0; | |
843 | int j = 0; | |
1da177e4 | 844 | |
1da177e4 LT |
845 | |
846 | if (!tz) | |
847 | goto end; | |
848 | ||
849 | if (tz->trips.critical.flags.valid) | |
850 | seq_printf(seq, "critical (S5): %ld C\n", | |
4be44fcd | 851 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); |
1da177e4 LT |
852 | |
853 | if (tz->trips.hot.flags.valid) | |
854 | seq_printf(seq, "hot (S4): %ld C\n", | |
4be44fcd | 855 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); |
1da177e4 LT |
856 | |
857 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
858 | seq_printf(seq, |
859 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
860 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
861 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
862 | tz->trips.passive.tsp); | |
863 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
864 | ||
865 | seq_printf(seq, "0x%p ", | |
866 | tz->trips.passive.devices.handles[j]); | |
1da177e4 LT |
867 | } |
868 | seq_puts(seq, "\n"); | |
869 | } | |
870 | ||
871 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
872 | if (!(tz->trips.active[i].flags.valid)) | |
873 | break; | |
874 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
875 | i, |
876 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
877 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
1da177e4 | 878 | seq_printf(seq, "0x%p ", |
4be44fcd | 879 | tz->trips.active[i].devices.handles[j]); |
1da177e4 LT |
880 | seq_puts(seq, "\n"); |
881 | } | |
882 | ||
4be44fcd | 883 | end: |
d550d98d | 884 | return 0; |
1da177e4 LT |
885 | } |
886 | ||
887 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
888 | { | |
889 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
890 | } | |
891 | ||
892 | static ssize_t | |
4be44fcd LB |
893 | acpi_thermal_write_trip_points(struct file *file, |
894 | const char __user * buffer, | |
895 | size_t count, loff_t * ppos) | |
1da177e4 | 896 | { |
4be44fcd LB |
897 | struct seq_file *m = (struct seq_file *)file->private_data; |
898 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1da177e4 | 899 | |
4be44fcd LB |
900 | char *limit_string; |
901 | int num, critical, hot, passive; | |
902 | int *active; | |
903 | int i = 0; | |
1da177e4 | 904 | |
1da177e4 LT |
905 | |
906 | limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); | |
4be44fcd | 907 | if (!limit_string) |
d550d98d | 908 | return -ENOMEM; |
1da177e4 LT |
909 | |
910 | memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); | |
911 | ||
4be44fcd | 912 | active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); |
fdc136cc DJ |
913 | if (!active) { |
914 | kfree(limit_string); | |
d550d98d | 915 | return -ENOMEM; |
fdc136cc | 916 | } |
1da177e4 LT |
917 | |
918 | if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { | |
1da177e4 LT |
919 | count = -EINVAL; |
920 | goto end; | |
921 | } | |
4be44fcd | 922 | |
1da177e4 | 923 | if (copy_from_user(limit_string, buffer, count)) { |
1da177e4 LT |
924 | count = -EFAULT; |
925 | goto end; | |
926 | } | |
4be44fcd | 927 | |
1da177e4 LT |
928 | limit_string[count] = '\0'; |
929 | ||
930 | num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", | |
4be44fcd LB |
931 | &critical, &hot, &passive, |
932 | &active[0], &active[1], &active[2], &active[3], &active[4], | |
933 | &active[5], &active[6], &active[7], &active[8], | |
934 | &active[9]); | |
935 | if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { | |
1da177e4 LT |
936 | count = -EINVAL; |
937 | goto end; | |
938 | } | |
939 | ||
940 | tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); | |
941 | tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); | |
942 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); | |
943 | for (i = 0; i < num - 3; i++) { | |
944 | if (!(tz->trips.active[i].flags.valid)) | |
945 | break; | |
946 | tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); | |
947 | } | |
4be44fcd LB |
948 | |
949 | end: | |
1da177e4 LT |
950 | kfree(active); |
951 | kfree(limit_string); | |
d550d98d | 952 | return count; |
1da177e4 LT |
953 | } |
954 | ||
1da177e4 LT |
955 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
956 | { | |
4be44fcd | 957 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 958 | |
1da177e4 LT |
959 | |
960 | if (!tz) | |
961 | goto end; | |
962 | ||
963 | if (!tz->flags.cooling_mode) { | |
964 | seq_puts(seq, "<setting not supported>\n"); | |
965 | } | |
966 | ||
4be44fcd | 967 | if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) |
1da177e4 LT |
968 | seq_printf(seq, "cooling mode: critical\n"); |
969 | else | |
970 | seq_printf(seq, "cooling mode: %s\n", | |
4be44fcd | 971 | tz->cooling_mode ? "passive" : "active"); |
1da177e4 | 972 | |
4be44fcd | 973 | end: |
d550d98d | 974 | return 0; |
1da177e4 LT |
975 | } |
976 | ||
977 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
978 | { | |
979 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 980 | PDE(inode)->data); |
1da177e4 LT |
981 | } |
982 | ||
983 | static ssize_t | |
4be44fcd LB |
984 | acpi_thermal_write_cooling_mode(struct file *file, |
985 | const char __user * buffer, | |
986 | size_t count, loff_t * ppos) | |
1da177e4 | 987 | { |
4be44fcd LB |
988 | struct seq_file *m = (struct seq_file *)file->private_data; |
989 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
990 | int result = 0; | |
991 | char mode_string[12] = { '\0' }; | |
1da177e4 | 992 | |
1da177e4 LT |
993 | |
994 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 995 | return -EINVAL; |
1da177e4 LT |
996 | |
997 | if (!tz->flags.cooling_mode) | |
d550d98d | 998 | return -ENODEV; |
1da177e4 LT |
999 | |
1000 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1001 | return -EFAULT; |
4be44fcd | 1002 | |
1da177e4 | 1003 | mode_string[count] = '\0'; |
4be44fcd LB |
1004 | |
1005 | result = acpi_thermal_set_cooling_mode(tz, | |
1006 | simple_strtoul(mode_string, NULL, | |
1007 | 0)); | |
1da177e4 | 1008 | if (result) |
d550d98d | 1009 | return result; |
1da177e4 LT |
1010 | |
1011 | acpi_thermal_check(tz); | |
1012 | ||
d550d98d | 1013 | return count; |
1da177e4 LT |
1014 | } |
1015 | ||
1da177e4 LT |
1016 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1017 | { | |
4be44fcd | 1018 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 1019 | |
1da177e4 LT |
1020 | |
1021 | if (!tz) | |
1022 | goto end; | |
1023 | ||
1024 | if (!tz->polling_frequency) { | |
1025 | seq_puts(seq, "<polling disabled>\n"); | |
1026 | goto end; | |
1027 | } | |
1028 | ||
1029 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1030 | (tz->polling_frequency / 10)); |
1da177e4 | 1031 | |
4be44fcd | 1032 | end: |
d550d98d | 1033 | return 0; |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1037 | { | |
1038 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1039 | PDE(inode)->data); |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | static ssize_t | |
4be44fcd LB |
1043 | acpi_thermal_write_polling(struct file *file, |
1044 | const char __user * buffer, | |
1045 | size_t count, loff_t * ppos) | |
1da177e4 | 1046 | { |
4be44fcd LB |
1047 | struct seq_file *m = (struct seq_file *)file->private_data; |
1048 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1049 | int result = 0; | |
1050 | char polling_string[12] = { '\0' }; | |
1051 | int seconds = 0; | |
1da177e4 | 1052 | |
1da177e4 LT |
1053 | |
1054 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1055 | return -EINVAL; |
4be44fcd | 1056 | |
1da177e4 | 1057 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1058 | return -EFAULT; |
4be44fcd | 1059 | |
1da177e4 LT |
1060 | polling_string[count] = '\0'; |
1061 | ||
1062 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1063 | |
1da177e4 LT |
1064 | result = acpi_thermal_set_polling(tz, seconds); |
1065 | if (result) | |
d550d98d | 1066 | return result; |
1da177e4 LT |
1067 | |
1068 | acpi_thermal_check(tz); | |
1069 | ||
d550d98d | 1070 | return count; |
1da177e4 LT |
1071 | } |
1072 | ||
4be44fcd | 1073 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1074 | { |
4be44fcd | 1075 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1076 | |
1da177e4 LT |
1077 | |
1078 | if (!acpi_device_dir(device)) { | |
1079 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1080 | acpi_thermal_dir); |
1da177e4 | 1081 | if (!acpi_device_dir(device)) |
d550d98d | 1082 | return -ENODEV; |
1da177e4 LT |
1083 | acpi_device_dir(device)->owner = THIS_MODULE; |
1084 | } | |
1085 | ||
1086 | /* 'state' [R] */ | |
1087 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1088 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1089 | if (!entry) |
d550d98d | 1090 | return -ENODEV; |
1da177e4 LT |
1091 | else { |
1092 | entry->proc_fops = &acpi_thermal_state_fops; | |
1093 | entry->data = acpi_driver_data(device); | |
1094 | entry->owner = THIS_MODULE; | |
1095 | } | |
1096 | ||
1097 | /* 'temperature' [R] */ | |
1098 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1099 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1100 | if (!entry) |
d550d98d | 1101 | return -ENODEV; |
1da177e4 LT |
1102 | else { |
1103 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1104 | entry->data = acpi_driver_data(device); | |
1105 | entry->owner = THIS_MODULE; | |
1106 | } | |
1107 | ||
1108 | /* 'trip_points' [R/W] */ | |
1109 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1110 | S_IFREG | S_IRUGO | S_IWUSR, |
1111 | acpi_device_dir(device)); | |
1da177e4 | 1112 | if (!entry) |
d550d98d | 1113 | return -ENODEV; |
1da177e4 LT |
1114 | else { |
1115 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1116 | entry->data = acpi_driver_data(device); | |
1117 | entry->owner = THIS_MODULE; | |
1118 | } | |
1119 | ||
1120 | /* 'cooling_mode' [R/W] */ | |
1121 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1122 | S_IFREG | S_IRUGO | S_IWUSR, |
1123 | acpi_device_dir(device)); | |
1da177e4 | 1124 | if (!entry) |
d550d98d | 1125 | return -ENODEV; |
1da177e4 LT |
1126 | else { |
1127 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1128 | entry->data = acpi_driver_data(device); | |
1129 | entry->owner = THIS_MODULE; | |
1130 | } | |
1131 | ||
1132 | /* 'polling_frequency' [R/W] */ | |
1133 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1134 | S_IFREG | S_IRUGO | S_IWUSR, |
1135 | acpi_device_dir(device)); | |
1da177e4 | 1136 | if (!entry) |
d550d98d | 1137 | return -ENODEV; |
1da177e4 LT |
1138 | else { |
1139 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1140 | entry->data = acpi_driver_data(device); | |
1141 | entry->owner = THIS_MODULE; | |
1142 | } | |
1143 | ||
d550d98d | 1144 | return 0; |
1da177e4 LT |
1145 | } |
1146 | ||
4be44fcd | 1147 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1148 | { |
1da177e4 LT |
1149 | |
1150 | if (acpi_device_dir(device)) { | |
1151 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1152 | acpi_device_dir(device)); | |
1153 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1154 | acpi_device_dir(device)); | |
1155 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1156 | acpi_device_dir(device)); | |
1157 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1158 | acpi_device_dir(device)); | |
1159 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1160 | acpi_device_dir(device)); | |
1161 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1162 | acpi_device_dir(device) = NULL; | |
1163 | } | |
1164 | ||
d550d98d | 1165 | return 0; |
1da177e4 LT |
1166 | } |
1167 | ||
1da177e4 LT |
1168 | /* -------------------------------------------------------------------------- |
1169 | Driver Interface | |
1170 | -------------------------------------------------------------------------- */ | |
1171 | ||
4be44fcd | 1172 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1173 | { |
4be44fcd LB |
1174 | struct acpi_thermal *tz = (struct acpi_thermal *)data; |
1175 | struct acpi_device *device = NULL; | |
1da177e4 | 1176 | |
1da177e4 LT |
1177 | |
1178 | if (!tz) | |
d550d98d | 1179 | return; |
1da177e4 | 1180 | |
8348e1b1 | 1181 | device = tz->device; |
1da177e4 LT |
1182 | |
1183 | switch (event) { | |
1184 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1185 | acpi_thermal_check(tz); | |
1186 | break; | |
1187 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1188 | acpi_thermal_get_trip_points(tz); | |
1189 | acpi_thermal_check(tz); | |
1190 | acpi_bus_generate_event(device, event, 0); | |
1191 | break; | |
1192 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1193 | if (tz->flags.devices) | |
1194 | acpi_thermal_get_devices(tz); | |
1195 | acpi_bus_generate_event(device, event, 0); | |
1196 | break; | |
1197 | default: | |
1198 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1199 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1200 | break; |
1201 | } | |
1202 | ||
d550d98d | 1203 | return; |
1da177e4 LT |
1204 | } |
1205 | ||
4be44fcd | 1206 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1207 | { |
4be44fcd | 1208 | int result = 0; |
1da177e4 | 1209 | |
1da177e4 LT |
1210 | |
1211 | if (!tz) | |
d550d98d | 1212 | return -EINVAL; |
1da177e4 LT |
1213 | |
1214 | /* Get temperature [_TMP] (required) */ | |
1215 | result = acpi_thermal_get_temperature(tz); | |
1216 | if (result) | |
d550d98d | 1217 | return result; |
1da177e4 LT |
1218 | |
1219 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1220 | result = acpi_thermal_get_trip_points(tz); | |
1221 | if (result) | |
d550d98d | 1222 | return result; |
1da177e4 LT |
1223 | |
1224 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1225 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1226 | if (!result) |
1da177e4 | 1227 | tz->flags.cooling_mode = 1; |
4be44fcd | 1228 | else { |
1da177e4 | 1229 | /* Oh,we have not _SCP method. |
4be44fcd | 1230 | Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ |
1da177e4 | 1231 | tz->flags.cooling_mode = 0; |
4be44fcd LB |
1232 | if (tz->trips.active[0].flags.valid |
1233 | && tz->trips.passive.flags.valid) { | |
1234 | if (tz->trips.passive.temperature > | |
1235 | tz->trips.active[0].temperature) | |
1da177e4 | 1236 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
4be44fcd | 1237 | else |
1da177e4 | 1238 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1239 | } else if (!tz->trips.active[0].flags.valid |
1240 | && tz->trips.passive.flags.valid) { | |
1da177e4 | 1241 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1242 | } else if (tz->trips.active[0].flags.valid |
1243 | && !tz->trips.passive.flags.valid) { | |
1da177e4 LT |
1244 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
1245 | } else { | |
1246 | /* _ACx and _PSV are optional, but _CRT is required */ | |
1247 | tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | /* Get default polling frequency [_TZP] (optional) */ | |
1252 | if (tzp) | |
1253 | tz->polling_frequency = tzp; | |
1254 | else | |
1255 | acpi_thermal_get_polling_frequency(tz); | |
1256 | ||
1257 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1258 | result = acpi_thermal_get_devices(tz); | |
1259 | if (!result) | |
1260 | tz->flags.devices = 1; | |
1261 | ||
d550d98d | 1262 | return 0; |
1da177e4 LT |
1263 | } |
1264 | ||
4be44fcd | 1265 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1266 | { |
4be44fcd LB |
1267 | int result = 0; |
1268 | acpi_status status = AE_OK; | |
1269 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1270 | |
1da177e4 LT |
1271 | |
1272 | if (!device) | |
d550d98d | 1273 | return -EINVAL; |
1da177e4 LT |
1274 | |
1275 | tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); | |
1276 | if (!tz) | |
d550d98d | 1277 | return -ENOMEM; |
1da177e4 LT |
1278 | memset(tz, 0, sizeof(struct acpi_thermal)); |
1279 | ||
1280 | tz->handle = device->handle; | |
8348e1b1 | 1281 | tz->device = device; |
1da177e4 LT |
1282 | strcpy(tz->name, device->pnp.bus_id); |
1283 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1284 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1285 | acpi_driver_data(device) = tz; | |
1286 | ||
1287 | result = acpi_thermal_get_info(tz); | |
1288 | if (result) | |
1289 | goto end; | |
1290 | ||
1291 | result = acpi_thermal_add_fs(device); | |
1292 | if (result) | |
09047e75 | 1293 | goto end; |
1da177e4 LT |
1294 | |
1295 | init_timer(&tz->timer); | |
1296 | ||
1297 | acpi_thermal_check(tz); | |
1298 | ||
1299 | status = acpi_install_notify_handler(tz->handle, | |
4be44fcd LB |
1300 | ACPI_DEVICE_NOTIFY, |
1301 | acpi_thermal_notify, tz); | |
1da177e4 | 1302 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1303 | result = -ENODEV; |
1304 | goto end; | |
1305 | } | |
1306 | ||
1307 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1308 | acpi_device_name(device), acpi_device_bid(device), |
1309 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1310 | |
4be44fcd | 1311 | end: |
1da177e4 LT |
1312 | if (result) { |
1313 | acpi_thermal_remove_fs(device); | |
1314 | kfree(tz); | |
1315 | } | |
1316 | ||
d550d98d | 1317 | return result; |
1da177e4 LT |
1318 | } |
1319 | ||
4be44fcd | 1320 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1321 | { |
4be44fcd LB |
1322 | acpi_status status = AE_OK; |
1323 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1324 | |
1da177e4 LT |
1325 | |
1326 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1327 | return -EINVAL; |
1da177e4 | 1328 | |
4be44fcd | 1329 | tz = (struct acpi_thermal *)acpi_driver_data(device); |
1da177e4 LT |
1330 | |
1331 | /* avoid timer adding new defer task */ | |
1332 | tz->zombie = 1; | |
1333 | /* wait for running timer (on other CPUs) finish */ | |
1334 | del_timer_sync(&(tz->timer)); | |
1335 | /* synchronize deferred task */ | |
1336 | acpi_os_wait_events_complete(NULL); | |
1337 | /* deferred task may reinsert timer */ | |
1338 | del_timer_sync(&(tz->timer)); | |
1339 | ||
1340 | status = acpi_remove_notify_handler(tz->handle, | |
4be44fcd LB |
1341 | ACPI_DEVICE_NOTIFY, |
1342 | acpi_thermal_notify); | |
1da177e4 LT |
1343 | |
1344 | /* Terminate policy */ | |
4be44fcd | 1345 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1346 | tz->trips.passive.flags.enabled = 0; |
1347 | acpi_thermal_passive(tz); | |
1348 | } | |
1349 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1350 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1351 | tz->trips.active[0].flags.enabled = 0; |
1352 | acpi_thermal_active(tz); | |
1353 | } | |
1354 | ||
1355 | acpi_thermal_remove_fs(device); | |
1356 | ||
1357 | kfree(tz); | |
d550d98d | 1358 | return 0; |
1da177e4 LT |
1359 | } |
1360 | ||
74ce1468 KK |
1361 | static int acpi_thermal_resume(struct acpi_device *device, int state) |
1362 | { | |
1363 | struct acpi_thermal *tz = NULL; | |
1364 | ||
1365 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1366 | return -EINVAL; |
74ce1468 KK |
1367 | |
1368 | tz = (struct acpi_thermal *)acpi_driver_data(device); | |
1369 | ||
1370 | acpi_thermal_check(tz); | |
1371 | ||
1372 | return AE_OK; | |
1373 | } | |
1374 | ||
4be44fcd | 1375 | static int __init acpi_thermal_init(void) |
1da177e4 | 1376 | { |
4be44fcd | 1377 | int result = 0; |
1da177e4 | 1378 | |
1da177e4 LT |
1379 | |
1380 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1381 | if (!acpi_thermal_dir) | |
d550d98d | 1382 | return -ENODEV; |
1da177e4 LT |
1383 | acpi_thermal_dir->owner = THIS_MODULE; |
1384 | ||
1385 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1386 | if (result < 0) { | |
1387 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1388 | return -ENODEV; |
1da177e4 LT |
1389 | } |
1390 | ||
d550d98d | 1391 | return 0; |
1da177e4 LT |
1392 | } |
1393 | ||
4be44fcd | 1394 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1395 | { |
1da177e4 LT |
1396 | |
1397 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1398 | ||
1399 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1400 | ||
d550d98d | 1401 | return; |
1da177e4 LT |
1402 | } |
1403 | ||
1da177e4 LT |
1404 | module_init(acpi_thermal_init); |
1405 | module_exit(acpi_thermal_exit); |