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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 { | |
8348e1b1 | 165 | struct acpi_device * device; |
4be44fcd LB |
166 | acpi_bus_id name; |
167 | unsigned long temperature; | |
168 | unsigned long last_temperature; | |
169 | unsigned long polling_frequency; | |
170 | u8 cooling_mode; | |
171 | volatile u8 zombie; | |
1da177e4 LT |
172 | struct acpi_thermal_flags flags; |
173 | struct acpi_thermal_state state; | |
174 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
175 | struct acpi_handle_list devices; |
176 | struct timer_list timer; | |
1da177e4 LT |
177 | }; |
178 | ||
179 | static struct file_operations acpi_thermal_state_fops = { | |
4be44fcd LB |
180 | .open = acpi_thermal_state_open_fs, |
181 | .read = seq_read, | |
182 | .llseek = seq_lseek, | |
183 | .release = single_release, | |
1da177e4 LT |
184 | }; |
185 | ||
186 | static struct file_operations acpi_thermal_temp_fops = { | |
4be44fcd LB |
187 | .open = acpi_thermal_temp_open_fs, |
188 | .read = seq_read, | |
189 | .llseek = seq_lseek, | |
190 | .release = single_release, | |
1da177e4 LT |
191 | }; |
192 | ||
193 | static struct file_operations acpi_thermal_trip_fops = { | |
4be44fcd LB |
194 | .open = acpi_thermal_trip_open_fs, |
195 | .read = seq_read, | |
196 | .write = acpi_thermal_write_trip_points, | |
197 | .llseek = seq_lseek, | |
198 | .release = single_release, | |
1da177e4 LT |
199 | }; |
200 | ||
201 | static struct file_operations acpi_thermal_cooling_fops = { | |
4be44fcd LB |
202 | .open = acpi_thermal_cooling_open_fs, |
203 | .read = seq_read, | |
204 | .write = acpi_thermal_write_cooling_mode, | |
205 | .llseek = seq_lseek, | |
206 | .release = single_release, | |
1da177e4 LT |
207 | }; |
208 | ||
209 | static struct file_operations acpi_thermal_polling_fops = { | |
4be44fcd LB |
210 | .open = acpi_thermal_polling_open_fs, |
211 | .read = seq_read, | |
212 | .write = acpi_thermal_write_polling, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
1da177e4 LT |
215 | }; |
216 | ||
217 | /* -------------------------------------------------------------------------- | |
218 | Thermal Zone Management | |
219 | -------------------------------------------------------------------------- */ | |
220 | ||
4be44fcd | 221 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 222 | { |
4be44fcd | 223 | acpi_status status = AE_OK; |
1da177e4 | 224 | |
1da177e4 LT |
225 | |
226 | if (!tz) | |
d550d98d | 227 | return -EINVAL; |
1da177e4 LT |
228 | |
229 | tz->last_temperature = tz->temperature; | |
230 | ||
4be44fcd | 231 | status = |
38ba7c9e | 232 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 233 | if (ACPI_FAILURE(status)) |
d550d98d | 234 | return -ENODEV; |
1da177e4 | 235 | |
4be44fcd LB |
236 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
237 | tz->temperature)); | |
1da177e4 | 238 | |
d550d98d | 239 | return 0; |
1da177e4 LT |
240 | } |
241 | ||
4be44fcd | 242 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 243 | { |
4be44fcd | 244 | acpi_status status = AE_OK; |
1da177e4 | 245 | |
1da177e4 LT |
246 | |
247 | if (!tz) | |
d550d98d | 248 | return -EINVAL; |
1da177e4 | 249 | |
4be44fcd | 250 | status = |
38ba7c9e | 251 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 252 | &tz->polling_frequency); |
1da177e4 | 253 | if (ACPI_FAILURE(status)) |
d550d98d | 254 | return -ENODEV; |
1da177e4 | 255 | |
4be44fcd LB |
256 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
257 | tz->polling_frequency)); | |
1da177e4 | 258 | |
d550d98d | 259 | return 0; |
1da177e4 LT |
260 | } |
261 | ||
4be44fcd | 262 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 263 | { |
1da177e4 LT |
264 | |
265 | if (!tz) | |
d550d98d | 266 | return -EINVAL; |
1da177e4 LT |
267 | |
268 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
269 | ||
4be44fcd LB |
270 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
271 | "Polling frequency set to %lu seconds\n", | |
272 | tz->polling_frequency)); | |
1da177e4 | 273 | |
d550d98d | 274 | return 0; |
1da177e4 LT |
275 | } |
276 | ||
4be44fcd | 277 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 278 | { |
4be44fcd LB |
279 | acpi_status status = AE_OK; |
280 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
281 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
282 | acpi_handle handle = NULL; | |
1da177e4 | 283 | |
1da177e4 LT |
284 | |
285 | if (!tz) | |
d550d98d | 286 | return -EINVAL; |
1da177e4 | 287 | |
38ba7c9e | 288 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
289 | if (ACPI_FAILURE(status)) { |
290 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 291 | return -ENODEV; |
1da177e4 LT |
292 | } |
293 | ||
294 | arg0.integer.value = mode; | |
295 | ||
296 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
297 | if (ACPI_FAILURE(status)) | |
d550d98d | 298 | return -ENODEV; |
1da177e4 LT |
299 | |
300 | tz->cooling_mode = mode; | |
301 | ||
4be44fcd LB |
302 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", |
303 | mode ? "passive" : "active")); | |
1da177e4 | 304 | |
d550d98d | 305 | return 0; |
1da177e4 LT |
306 | } |
307 | ||
4be44fcd | 308 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 309 | { |
4be44fcd LB |
310 | acpi_status status = AE_OK; |
311 | int i = 0; | |
1da177e4 | 312 | |
1da177e4 LT |
313 | |
314 | if (!tz) | |
d550d98d | 315 | return -EINVAL; |
1da177e4 LT |
316 | |
317 | /* Critical Shutdown (required) */ | |
318 | ||
38ba7c9e | 319 | status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, |
4be44fcd | 320 | &tz->trips.critical.temperature); |
1da177e4 LT |
321 | if (ACPI_FAILURE(status)) { |
322 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 323 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 324 | return -ENODEV; |
4be44fcd | 325 | } else { |
1da177e4 | 326 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
327 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
328 | "Found critical threshold [%lu]\n", | |
329 | tz->trips.critical.temperature)); | |
1da177e4 LT |
330 | } |
331 | ||
332 | /* Critical Sleep (optional) */ | |
333 | ||
4be44fcd | 334 | status = |
38ba7c9e | 335 | acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, |
4be44fcd | 336 | &tz->trips.hot.temperature); |
1da177e4 LT |
337 | if (ACPI_FAILURE(status)) { |
338 | tz->trips.hot.flags.valid = 0; | |
339 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 340 | } else { |
1da177e4 | 341 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
343 | tz->trips.hot.temperature)); | |
1da177e4 LT |
344 | } |
345 | ||
346 | /* Passive: Processors (optional) */ | |
347 | ||
4be44fcd | 348 | status = |
38ba7c9e | 349 | acpi_evaluate_integer(tz->device->handle, "_PSV", NULL, |
4be44fcd | 350 | &tz->trips.passive.temperature); |
1da177e4 LT |
351 | if (ACPI_FAILURE(status)) { |
352 | tz->trips.passive.flags.valid = 0; | |
353 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 354 | } else { |
1da177e4 LT |
355 | tz->trips.passive.flags.valid = 1; |
356 | ||
4be44fcd | 357 | status = |
38ba7c9e | 358 | acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, |
4be44fcd | 359 | &tz->trips.passive.tc1); |
1da177e4 LT |
360 | if (ACPI_FAILURE(status)) |
361 | tz->trips.passive.flags.valid = 0; | |
362 | ||
4be44fcd | 363 | status = |
38ba7c9e | 364 | acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, |
4be44fcd | 365 | &tz->trips.passive.tc2); |
1da177e4 LT |
366 | if (ACPI_FAILURE(status)) |
367 | tz->trips.passive.flags.valid = 0; | |
368 | ||
4be44fcd | 369 | status = |
38ba7c9e | 370 | acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, |
4be44fcd | 371 | &tz->trips.passive.tsp); |
1da177e4 LT |
372 | if (ACPI_FAILURE(status)) |
373 | tz->trips.passive.flags.valid = 0; | |
374 | ||
4be44fcd | 375 | status = |
38ba7c9e | 376 | acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, |
4be44fcd | 377 | &tz->trips.passive.devices); |
1da177e4 LT |
378 | if (ACPI_FAILURE(status)) |
379 | tz->trips.passive.flags.valid = 0; | |
380 | ||
381 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 382 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 383 | else |
4be44fcd LB |
384 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
385 | "Found passive threshold [%lu]\n", | |
386 | tz->trips.passive.temperature)); | |
1da177e4 LT |
387 | } |
388 | ||
389 | /* Active: Fans, etc. (optional) */ | |
390 | ||
4be44fcd | 391 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 392 | |
4be44fcd | 393 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 394 | |
4be44fcd | 395 | status = |
38ba7c9e | 396 | acpi_evaluate_integer(tz->device->handle, name, NULL, |
4be44fcd | 397 | &tz->trips.active[i].temperature); |
1da177e4 LT |
398 | if (ACPI_FAILURE(status)) |
399 | break; | |
400 | ||
401 | name[2] = 'L'; | |
4be44fcd | 402 | status = |
38ba7c9e | 403 | acpi_evaluate_reference(tz->device->handle, name, NULL, |
4be44fcd | 404 | &tz->trips.active[i].devices); |
1da177e4 LT |
405 | if (ACPI_SUCCESS(status)) { |
406 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
407 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
408 | "Found active threshold [%d]:[%lu]\n", | |
409 | i, tz->trips.active[i].temperature)); | |
410 | } else | |
a6fc6720 TR |
411 | ACPI_EXCEPTION((AE_INFO, status, |
412 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
413 | } |
414 | ||
d550d98d | 415 | return 0; |
1da177e4 LT |
416 | } |
417 | ||
4be44fcd | 418 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 419 | { |
4be44fcd | 420 | acpi_status status = AE_OK; |
1da177e4 | 421 | |
1da177e4 LT |
422 | |
423 | if (!tz) | |
d550d98d | 424 | return -EINVAL; |
1da177e4 | 425 | |
4be44fcd | 426 | status = |
38ba7c9e | 427 | acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); |
1da177e4 | 428 | if (ACPI_FAILURE(status)) |
d550d98d | 429 | return -ENODEV; |
1da177e4 | 430 | |
d550d98d | 431 | return 0; |
1da177e4 LT |
432 | } |
433 | ||
4be44fcd | 434 | static int acpi_thermal_call_usermode(char *path) |
1da177e4 | 435 | { |
4be44fcd LB |
436 | char *argv[2] = { NULL, NULL }; |
437 | char *envp[3] = { NULL, NULL, NULL }; | |
1da177e4 | 438 | |
1da177e4 LT |
439 | |
440 | if (!path) | |
d550d98d | 441 | return -EINVAL; |
1da177e4 LT |
442 | |
443 | argv[0] = path; | |
444 | ||
445 | /* minimal command environment */ | |
446 | envp[0] = "HOME=/"; | |
447 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
4be44fcd | 448 | |
1da177e4 LT |
449 | call_usermodehelper(argv[0], argv, envp, 0); |
450 | ||
d550d98d | 451 | return 0; |
1da177e4 LT |
452 | } |
453 | ||
4be44fcd | 454 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 455 | { |
1da177e4 | 456 | if (!tz || !tz->trips.critical.flags.valid) |
d550d98d | 457 | return -EINVAL; |
1da177e4 LT |
458 | |
459 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 460 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 461 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 462 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
463 | tz->trips.critical.flags.enabled = 0; |
464 | ||
4be44fcd LB |
465 | printk(KERN_EMERG |
466 | "Critical temperature reached (%ld C), shutting down.\n", | |
467 | KELVIN_TO_CELSIUS(tz->temperature)); | |
8348e1b1 | 468 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 469 | tz->trips.critical.flags.enabled); |
1da177e4 LT |
470 | |
471 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
472 | ||
d550d98d | 473 | return 0; |
1da177e4 LT |
474 | } |
475 | ||
4be44fcd | 476 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 477 | { |
1da177e4 | 478 | if (!tz || !tz->trips.hot.flags.valid) |
d550d98d | 479 | return -EINVAL; |
1da177e4 LT |
480 | |
481 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 482 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 483 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 484 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
485 | tz->trips.hot.flags.enabled = 0; |
486 | ||
8348e1b1 | 487 | acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 488 | tz->trips.hot.flags.enabled); |
1da177e4 LT |
489 | |
490 | /* TBD: Call user-mode "sleep(S4)" function */ | |
491 | ||
d550d98d | 492 | return 0; |
1da177e4 LT |
493 | } |
494 | ||
1cbf4c56 | 495 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 496 | { |
1cbf4c56 | 497 | int result = 1; |
1da177e4 | 498 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
499 | int trend = 0; |
500 | int i = 0; | |
1da177e4 | 501 | |
1da177e4 LT |
502 | |
503 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 504 | return; |
1da177e4 LT |
505 | |
506 | passive = &(tz->trips.passive); | |
507 | ||
508 | /* | |
509 | * Above Trip? | |
510 | * ----------- | |
511 | * Calculate the thermal trend (using the passive cooling equation) | |
512 | * and modify the performance limit for all passive cooling devices | |
513 | * accordingly. Note that we assume symmetry. | |
514 | */ | |
515 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
516 | trend = |
517 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
518 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
519 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
520 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
521 | trend, passive->tc1, tz->temperature, | |
522 | tz->last_temperature, passive->tc2, | |
523 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 524 | passive->flags.enabled = 1; |
1da177e4 LT |
525 | /* Heating up? */ |
526 | if (trend > 0) | |
4be44fcd LB |
527 | for (i = 0; i < passive->devices.count; i++) |
528 | acpi_processor_set_thermal_limit(passive-> | |
529 | devices. | |
530 | handles[i], | |
531 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 532 | /* Cooling off? */ |
1cbf4c56 | 533 | else if (trend < 0) { |
4be44fcd | 534 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
535 | /* |
536 | * assume that we are on highest | |
537 | * freq/lowest thrott and can leave | |
538 | * passive mode, even in error case | |
539 | */ | |
540 | if (!acpi_processor_set_thermal_limit | |
541 | (passive->devices.handles[i], | |
542 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
543 | result = 0; | |
544 | /* | |
545 | * Leave cooling mode, even if the temp might | |
546 | * higher than trip point This is because some | |
547 | * machines might have long thermal polling | |
548 | * frequencies (tsp) defined. We will fall back | |
549 | * into passive mode in next cycle (probably quicker) | |
550 | */ | |
551 | if (result) { | |
552 | passive->flags.enabled = 0; | |
553 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
554 | "Disabling passive cooling, still above threshold," | |
555 | " but we are cooling down\n")); | |
556 | } | |
557 | } | |
558 | return; | |
1da177e4 LT |
559 | } |
560 | ||
561 | /* | |
562 | * Below Trip? | |
563 | * ----------- | |
564 | * Implement passive cooling hysteresis to slowly increase performance | |
565 | * and avoid thrashing around the passive trip point. Note that we | |
566 | * assume symmetry. | |
567 | */ | |
1cbf4c56 TR |
568 | if (!passive->flags.enabled) |
569 | return; | |
570 | for (i = 0; i < passive->devices.count; i++) | |
571 | if (!acpi_processor_set_thermal_limit | |
572 | (passive->devices.handles[i], | |
573 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
574 | result = 0; | |
575 | if (result) { | |
576 | passive->flags.enabled = 0; | |
577 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
578 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 579 | } |
1da177e4 LT |
580 | } |
581 | ||
1cbf4c56 | 582 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 583 | { |
4be44fcd | 584 | int result = 0; |
1da177e4 | 585 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
586 | int i = 0; |
587 | int j = 0; | |
588 | unsigned long maxtemp = 0; | |
1da177e4 | 589 | |
1da177e4 LT |
590 | |
591 | if (!tz) | |
1cbf4c56 | 592 | return; |
1da177e4 | 593 | |
4be44fcd | 594 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
595 | active = &(tz->trips.active[i]); |
596 | if (!active || !active->flags.valid) | |
597 | break; | |
1da177e4 | 598 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
599 | /* |
600 | * Above Threshold? | |
601 | * ---------------- | |
602 | * If not already enabled, turn ON all cooling devices | |
603 | * associated with this active threshold. | |
604 | */ | |
1da177e4 | 605 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
606 | tz->state.active_index = i; |
607 | maxtemp = active->temperature; | |
608 | if (active->flags.enabled) | |
609 | continue; | |
1da177e4 | 610 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
611 | result = |
612 | acpi_bus_set_power(active->devices. | |
613 | handles[j], | |
1cbf4c56 | 614 | ACPI_STATE_D0); |
1da177e4 | 615 | if (result) { |
cece9296 LB |
616 | printk(KERN_WARNING PREFIX |
617 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 618 | active->devices. |
cece9296 | 619 | handles[j]); |
1da177e4 LT |
620 | continue; |
621 | } | |
1cbf4c56 | 622 | active->flags.enabled = 1; |
4be44fcd | 623 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 624 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 625 | active->devices.handles[j])); |
1da177e4 | 626 | } |
1cbf4c56 TR |
627 | continue; |
628 | } | |
629 | if (!active->flags.enabled) | |
630 | continue; | |
631 | /* | |
632 | * Below Threshold? | |
633 | * ---------------- | |
634 | * Turn OFF all cooling devices associated with this | |
635 | * threshold. | |
636 | */ | |
637 | for (j = 0; j < active->devices.count; j++) { | |
638 | result = acpi_bus_set_power(active->devices.handles[j], | |
639 | ACPI_STATE_D3); | |
640 | if (result) { | |
cece9296 LB |
641 | printk(KERN_WARNING PREFIX |
642 | "Unable to turn cooling device [%p] 'off'\n", | |
643 | active->devices.handles[j]); | |
1cbf4c56 TR |
644 | continue; |
645 | } | |
646 | active->flags.enabled = 0; | |
647 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
648 | "Cooling device [%p] now 'off'\n", | |
649 | active->devices.handles[j])); | |
1da177e4 LT |
650 | } |
651 | } | |
1da177e4 LT |
652 | } |
653 | ||
4be44fcd | 654 | static void acpi_thermal_check(void *context); |
1da177e4 | 655 | |
4be44fcd | 656 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
657 | { |
658 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
659 | if (!tz->zombie) | |
b8d35192 | 660 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
661 | } |
662 | ||
4be44fcd | 663 | static void acpi_thermal_check(void *data) |
1da177e4 | 664 | { |
4be44fcd LB |
665 | int result = 0; |
666 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
667 | unsigned long sleep_time = 0; | |
668 | int i = 0; | |
1da177e4 LT |
669 | struct acpi_thermal_state state; |
670 | ||
1da177e4 LT |
671 | |
672 | if (!tz) { | |
6468463a | 673 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 674 | return; |
1da177e4 LT |
675 | } |
676 | ||
677 | state = tz->state; | |
678 | ||
679 | result = acpi_thermal_get_temperature(tz); | |
680 | if (result) | |
d550d98d | 681 | return; |
4be44fcd | 682 | |
1da177e4 | 683 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 684 | |
1da177e4 LT |
685 | /* |
686 | * Check Trip Points | |
687 | * ----------------- | |
688 | * Compare the current temperature to the trip point values to see | |
689 | * if we've entered one of the thermal policy states. Note that | |
690 | * this function determines when a state is entered, but the | |
691 | * individual policy decides when it is exited (e.g. hysteresis). | |
692 | */ | |
693 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
694 | state.critical |= |
695 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
696 | if (tz->trips.hot.flags.valid) |
697 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
698 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
699 | state.passive |= |
700 | (tz->temperature >= tz->trips.passive.temperature); | |
701 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 702 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
703 | state.active |= |
704 | (tz->temperature >= | |
705 | tz->trips.active[i].temperature); | |
1da177e4 LT |
706 | |
707 | /* | |
708 | * Invoke Policy | |
709 | * ------------- | |
710 | * Separated from the above check to allow individual policy to | |
711 | * determine when to exit a given state. | |
712 | */ | |
713 | if (state.critical) | |
714 | acpi_thermal_critical(tz); | |
715 | if (state.hot) | |
716 | acpi_thermal_hot(tz); | |
717 | if (state.passive) | |
718 | acpi_thermal_passive(tz); | |
719 | if (state.active) | |
720 | acpi_thermal_active(tz); | |
721 | ||
722 | /* | |
723 | * Calculate State | |
724 | * --------------- | |
725 | * Again, separated from the above two to allow independent policy | |
726 | * decisions. | |
727 | */ | |
1cbf4c56 TR |
728 | tz->state.critical = tz->trips.critical.flags.enabled; |
729 | tz->state.hot = tz->trips.hot.flags.enabled; | |
730 | tz->state.passive = tz->trips.passive.flags.enabled; | |
731 | tz->state.active = 0; | |
4be44fcd | 732 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 733 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
734 | |
735 | /* | |
736 | * Calculate Sleep Time | |
737 | * -------------------- | |
738 | * If we're in the passive state, use _TSP's value. Otherwise | |
739 | * use the default polling frequency (e.g. _TZP). If no polling | |
740 | * frequency is specified then we'll wait forever (at least until | |
741 | * a thermal event occurs). Note that _TSP and _TZD values are | |
742 | * given in 1/10th seconds (we must covert to milliseconds). | |
743 | */ | |
744 | if (tz->state.passive) | |
745 | sleep_time = tz->trips.passive.tsp * 100; | |
746 | else if (tz->polling_frequency > 0) | |
747 | sleep_time = tz->polling_frequency * 100; | |
748 | ||
4be44fcd LB |
749 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
750 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
751 | |
752 | /* | |
753 | * Schedule Next Poll | |
754 | * ------------------ | |
755 | */ | |
756 | if (!sleep_time) { | |
757 | if (timer_pending(&(tz->timer))) | |
758 | del_timer(&(tz->timer)); | |
4be44fcd | 759 | } else { |
1da177e4 LT |
760 | if (timer_pending(&(tz->timer))) |
761 | mod_timer(&(tz->timer), (HZ * sleep_time) / 1000); | |
762 | else { | |
4be44fcd | 763 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
764 | tz->timer.function = acpi_thermal_run; |
765 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
766 | add_timer(&(tz->timer)); | |
767 | } | |
768 | } | |
769 | ||
d550d98d | 770 | return; |
1da177e4 LT |
771 | } |
772 | ||
1da177e4 LT |
773 | /* -------------------------------------------------------------------------- |
774 | FS Interface (/proc) | |
775 | -------------------------------------------------------------------------- */ | |
776 | ||
4be44fcd | 777 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
778 | |
779 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
780 | { | |
4be44fcd | 781 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 782 | |
1da177e4 LT |
783 | |
784 | if (!tz) | |
785 | goto end; | |
786 | ||
787 | seq_puts(seq, "state: "); | |
788 | ||
4be44fcd LB |
789 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
790 | && !tz->state.active) | |
1da177e4 LT |
791 | seq_puts(seq, "ok\n"); |
792 | else { | |
793 | if (tz->state.critical) | |
794 | seq_puts(seq, "critical "); | |
795 | if (tz->state.hot) | |
796 | seq_puts(seq, "hot "); | |
797 | if (tz->state.passive) | |
798 | seq_puts(seq, "passive "); | |
799 | if (tz->state.active) | |
800 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
801 | seq_puts(seq, "\n"); | |
802 | } | |
803 | ||
4be44fcd | 804 | end: |
d550d98d | 805 | return 0; |
1da177e4 LT |
806 | } |
807 | ||
808 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
809 | { | |
810 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
811 | } | |
812 | ||
1da177e4 LT |
813 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
814 | { | |
4be44fcd LB |
815 | int result = 0; |
816 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
1da177e4 | 817 | |
1da177e4 LT |
818 | |
819 | if (!tz) | |
820 | goto end; | |
821 | ||
822 | result = acpi_thermal_get_temperature(tz); | |
823 | if (result) | |
824 | goto end; | |
825 | ||
4be44fcd LB |
826 | seq_printf(seq, "temperature: %ld C\n", |
827 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 828 | |
4be44fcd | 829 | end: |
d550d98d | 830 | return 0; |
1da177e4 LT |
831 | } |
832 | ||
833 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
834 | { | |
835 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
836 | } | |
837 | ||
1da177e4 LT |
838 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
839 | { | |
4be44fcd LB |
840 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
841 | int i = 0; | |
842 | int j = 0; | |
1da177e4 | 843 | |
1da177e4 LT |
844 | |
845 | if (!tz) | |
846 | goto end; | |
847 | ||
848 | if (tz->trips.critical.flags.valid) | |
849 | seq_printf(seq, "critical (S5): %ld C\n", | |
4be44fcd | 850 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); |
1da177e4 LT |
851 | |
852 | if (tz->trips.hot.flags.valid) | |
853 | seq_printf(seq, "hot (S4): %ld C\n", | |
4be44fcd | 854 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); |
1da177e4 LT |
855 | |
856 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
857 | seq_printf(seq, |
858 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
859 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
860 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
861 | tz->trips.passive.tsp); | |
862 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
863 | ||
864 | seq_printf(seq, "0x%p ", | |
865 | tz->trips.passive.devices.handles[j]); | |
1da177e4 LT |
866 | } |
867 | seq_puts(seq, "\n"); | |
868 | } | |
869 | ||
870 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
871 | if (!(tz->trips.active[i].flags.valid)) | |
872 | break; | |
873 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
874 | i, |
875 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
876 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
1da177e4 | 877 | seq_printf(seq, "0x%p ", |
4be44fcd | 878 | tz->trips.active[i].devices.handles[j]); |
1da177e4 LT |
879 | seq_puts(seq, "\n"); |
880 | } | |
881 | ||
4be44fcd | 882 | end: |
d550d98d | 883 | return 0; |
1da177e4 LT |
884 | } |
885 | ||
886 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
887 | { | |
888 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
889 | } | |
890 | ||
891 | static ssize_t | |
4be44fcd LB |
892 | acpi_thermal_write_trip_points(struct file *file, |
893 | const char __user * buffer, | |
894 | size_t count, loff_t * ppos) | |
1da177e4 | 895 | { |
4be44fcd LB |
896 | struct seq_file *m = (struct seq_file *)file->private_data; |
897 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1da177e4 | 898 | |
4be44fcd LB |
899 | char *limit_string; |
900 | int num, critical, hot, passive; | |
901 | int *active; | |
902 | int i = 0; | |
1da177e4 | 903 | |
1da177e4 LT |
904 | |
905 | limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); | |
4be44fcd | 906 | if (!limit_string) |
d550d98d | 907 | return -ENOMEM; |
1da177e4 LT |
908 | |
909 | memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); | |
910 | ||
4be44fcd | 911 | active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); |
fdc136cc DJ |
912 | if (!active) { |
913 | kfree(limit_string); | |
d550d98d | 914 | return -ENOMEM; |
fdc136cc | 915 | } |
1da177e4 LT |
916 | |
917 | if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { | |
1da177e4 LT |
918 | count = -EINVAL; |
919 | goto end; | |
920 | } | |
4be44fcd | 921 | |
1da177e4 | 922 | if (copy_from_user(limit_string, buffer, count)) { |
1da177e4 LT |
923 | count = -EFAULT; |
924 | goto end; | |
925 | } | |
4be44fcd | 926 | |
1da177e4 LT |
927 | limit_string[count] = '\0'; |
928 | ||
929 | num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", | |
4be44fcd LB |
930 | &critical, &hot, &passive, |
931 | &active[0], &active[1], &active[2], &active[3], &active[4], | |
932 | &active[5], &active[6], &active[7], &active[8], | |
933 | &active[9]); | |
934 | if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { | |
1da177e4 LT |
935 | count = -EINVAL; |
936 | goto end; | |
937 | } | |
938 | ||
939 | tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); | |
940 | tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); | |
941 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); | |
942 | for (i = 0; i < num - 3; i++) { | |
943 | if (!(tz->trips.active[i].flags.valid)) | |
944 | break; | |
945 | tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); | |
946 | } | |
4be44fcd LB |
947 | |
948 | end: | |
1da177e4 LT |
949 | kfree(active); |
950 | kfree(limit_string); | |
d550d98d | 951 | return count; |
1da177e4 LT |
952 | } |
953 | ||
1da177e4 LT |
954 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
955 | { | |
4be44fcd | 956 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 957 | |
1da177e4 LT |
958 | |
959 | if (!tz) | |
960 | goto end; | |
961 | ||
962 | if (!tz->flags.cooling_mode) { | |
963 | seq_puts(seq, "<setting not supported>\n"); | |
964 | } | |
965 | ||
4be44fcd | 966 | if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) |
1da177e4 LT |
967 | seq_printf(seq, "cooling mode: critical\n"); |
968 | else | |
969 | seq_printf(seq, "cooling mode: %s\n", | |
4be44fcd | 970 | tz->cooling_mode ? "passive" : "active"); |
1da177e4 | 971 | |
4be44fcd | 972 | end: |
d550d98d | 973 | return 0; |
1da177e4 LT |
974 | } |
975 | ||
976 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
977 | { | |
978 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 979 | PDE(inode)->data); |
1da177e4 LT |
980 | } |
981 | ||
982 | static ssize_t | |
4be44fcd LB |
983 | acpi_thermal_write_cooling_mode(struct file *file, |
984 | const char __user * buffer, | |
985 | size_t count, loff_t * ppos) | |
1da177e4 | 986 | { |
4be44fcd LB |
987 | struct seq_file *m = (struct seq_file *)file->private_data; |
988 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
989 | int result = 0; | |
990 | char mode_string[12] = { '\0' }; | |
1da177e4 | 991 | |
1da177e4 LT |
992 | |
993 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 994 | return -EINVAL; |
1da177e4 LT |
995 | |
996 | if (!tz->flags.cooling_mode) | |
d550d98d | 997 | return -ENODEV; |
1da177e4 LT |
998 | |
999 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1000 | return -EFAULT; |
4be44fcd | 1001 | |
1da177e4 | 1002 | mode_string[count] = '\0'; |
4be44fcd LB |
1003 | |
1004 | result = acpi_thermal_set_cooling_mode(tz, | |
1005 | simple_strtoul(mode_string, NULL, | |
1006 | 0)); | |
1da177e4 | 1007 | if (result) |
d550d98d | 1008 | return result; |
1da177e4 LT |
1009 | |
1010 | acpi_thermal_check(tz); | |
1011 | ||
d550d98d | 1012 | return count; |
1da177e4 LT |
1013 | } |
1014 | ||
1da177e4 LT |
1015 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1016 | { | |
4be44fcd | 1017 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 1018 | |
1da177e4 LT |
1019 | |
1020 | if (!tz) | |
1021 | goto end; | |
1022 | ||
1023 | if (!tz->polling_frequency) { | |
1024 | seq_puts(seq, "<polling disabled>\n"); | |
1025 | goto end; | |
1026 | } | |
1027 | ||
1028 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1029 | (tz->polling_frequency / 10)); |
1da177e4 | 1030 | |
4be44fcd | 1031 | end: |
d550d98d | 1032 | return 0; |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1036 | { | |
1037 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1038 | PDE(inode)->data); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static ssize_t | |
4be44fcd LB |
1042 | acpi_thermal_write_polling(struct file *file, |
1043 | const char __user * buffer, | |
1044 | size_t count, loff_t * ppos) | |
1da177e4 | 1045 | { |
4be44fcd LB |
1046 | struct seq_file *m = (struct seq_file *)file->private_data; |
1047 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1048 | int result = 0; | |
1049 | char polling_string[12] = { '\0' }; | |
1050 | int seconds = 0; | |
1da177e4 | 1051 | |
1da177e4 LT |
1052 | |
1053 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1054 | return -EINVAL; |
4be44fcd | 1055 | |
1da177e4 | 1056 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1057 | return -EFAULT; |
4be44fcd | 1058 | |
1da177e4 LT |
1059 | polling_string[count] = '\0'; |
1060 | ||
1061 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1062 | |
1da177e4 LT |
1063 | result = acpi_thermal_set_polling(tz, seconds); |
1064 | if (result) | |
d550d98d | 1065 | return result; |
1da177e4 LT |
1066 | |
1067 | acpi_thermal_check(tz); | |
1068 | ||
d550d98d | 1069 | return count; |
1da177e4 LT |
1070 | } |
1071 | ||
4be44fcd | 1072 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1073 | { |
4be44fcd | 1074 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1075 | |
1da177e4 LT |
1076 | |
1077 | if (!acpi_device_dir(device)) { | |
1078 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1079 | acpi_thermal_dir); |
1da177e4 | 1080 | if (!acpi_device_dir(device)) |
d550d98d | 1081 | return -ENODEV; |
1da177e4 LT |
1082 | acpi_device_dir(device)->owner = THIS_MODULE; |
1083 | } | |
1084 | ||
1085 | /* 'state' [R] */ | |
1086 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1087 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1088 | if (!entry) |
d550d98d | 1089 | return -ENODEV; |
1da177e4 LT |
1090 | else { |
1091 | entry->proc_fops = &acpi_thermal_state_fops; | |
1092 | entry->data = acpi_driver_data(device); | |
1093 | entry->owner = THIS_MODULE; | |
1094 | } | |
1095 | ||
1096 | /* 'temperature' [R] */ | |
1097 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1098 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1099 | if (!entry) |
d550d98d | 1100 | return -ENODEV; |
1da177e4 LT |
1101 | else { |
1102 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1103 | entry->data = acpi_driver_data(device); | |
1104 | entry->owner = THIS_MODULE; | |
1105 | } | |
1106 | ||
1107 | /* 'trip_points' [R/W] */ | |
1108 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1109 | S_IFREG | S_IRUGO | S_IWUSR, |
1110 | acpi_device_dir(device)); | |
1da177e4 | 1111 | if (!entry) |
d550d98d | 1112 | return -ENODEV; |
1da177e4 LT |
1113 | else { |
1114 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1115 | entry->data = acpi_driver_data(device); | |
1116 | entry->owner = THIS_MODULE; | |
1117 | } | |
1118 | ||
1119 | /* 'cooling_mode' [R/W] */ | |
1120 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1121 | S_IFREG | S_IRUGO | S_IWUSR, |
1122 | acpi_device_dir(device)); | |
1da177e4 | 1123 | if (!entry) |
d550d98d | 1124 | return -ENODEV; |
1da177e4 LT |
1125 | else { |
1126 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1127 | entry->data = acpi_driver_data(device); | |
1128 | entry->owner = THIS_MODULE; | |
1129 | } | |
1130 | ||
1131 | /* 'polling_frequency' [R/W] */ | |
1132 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1133 | S_IFREG | S_IRUGO | S_IWUSR, |
1134 | acpi_device_dir(device)); | |
1da177e4 | 1135 | if (!entry) |
d550d98d | 1136 | return -ENODEV; |
1da177e4 LT |
1137 | else { |
1138 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1139 | entry->data = acpi_driver_data(device); | |
1140 | entry->owner = THIS_MODULE; | |
1141 | } | |
1142 | ||
d550d98d | 1143 | return 0; |
1da177e4 LT |
1144 | } |
1145 | ||
4be44fcd | 1146 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1147 | { |
1da177e4 LT |
1148 | |
1149 | if (acpi_device_dir(device)) { | |
1150 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1151 | acpi_device_dir(device)); | |
1152 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1153 | acpi_device_dir(device)); | |
1154 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1155 | acpi_device_dir(device)); | |
1156 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1157 | acpi_device_dir(device)); | |
1158 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1159 | acpi_device_dir(device)); | |
1160 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1161 | acpi_device_dir(device) = NULL; | |
1162 | } | |
1163 | ||
d550d98d | 1164 | return 0; |
1da177e4 LT |
1165 | } |
1166 | ||
1da177e4 LT |
1167 | /* -------------------------------------------------------------------------- |
1168 | Driver Interface | |
1169 | -------------------------------------------------------------------------- */ | |
1170 | ||
4be44fcd | 1171 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1172 | { |
4be44fcd LB |
1173 | struct acpi_thermal *tz = (struct acpi_thermal *)data; |
1174 | struct acpi_device *device = NULL; | |
1da177e4 | 1175 | |
1da177e4 LT |
1176 | |
1177 | if (!tz) | |
d550d98d | 1178 | return; |
1da177e4 | 1179 | |
8348e1b1 | 1180 | device = tz->device; |
1da177e4 LT |
1181 | |
1182 | switch (event) { | |
1183 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1184 | acpi_thermal_check(tz); | |
1185 | break; | |
1186 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1187 | acpi_thermal_get_trip_points(tz); | |
1188 | acpi_thermal_check(tz); | |
1189 | acpi_bus_generate_event(device, event, 0); | |
1190 | break; | |
1191 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1192 | if (tz->flags.devices) | |
1193 | acpi_thermal_get_devices(tz); | |
1194 | acpi_bus_generate_event(device, event, 0); | |
1195 | break; | |
1196 | default: | |
1197 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1198 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1199 | break; |
1200 | } | |
1201 | ||
d550d98d | 1202 | return; |
1da177e4 LT |
1203 | } |
1204 | ||
4be44fcd | 1205 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1206 | { |
4be44fcd | 1207 | int result = 0; |
1da177e4 | 1208 | |
1da177e4 LT |
1209 | |
1210 | if (!tz) | |
d550d98d | 1211 | return -EINVAL; |
1da177e4 LT |
1212 | |
1213 | /* Get temperature [_TMP] (required) */ | |
1214 | result = acpi_thermal_get_temperature(tz); | |
1215 | if (result) | |
d550d98d | 1216 | return result; |
1da177e4 LT |
1217 | |
1218 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1219 | result = acpi_thermal_get_trip_points(tz); | |
1220 | if (result) | |
d550d98d | 1221 | return result; |
1da177e4 LT |
1222 | |
1223 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1224 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1225 | if (!result) |
1da177e4 | 1226 | tz->flags.cooling_mode = 1; |
4be44fcd | 1227 | else { |
1da177e4 | 1228 | /* Oh,we have not _SCP method. |
4be44fcd | 1229 | Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ |
1da177e4 | 1230 | tz->flags.cooling_mode = 0; |
4be44fcd LB |
1231 | if (tz->trips.active[0].flags.valid |
1232 | && tz->trips.passive.flags.valid) { | |
1233 | if (tz->trips.passive.temperature > | |
1234 | tz->trips.active[0].temperature) | |
1da177e4 | 1235 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
4be44fcd | 1236 | else |
1da177e4 | 1237 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1238 | } else if (!tz->trips.active[0].flags.valid |
1239 | && tz->trips.passive.flags.valid) { | |
1da177e4 | 1240 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1241 | } else if (tz->trips.active[0].flags.valid |
1242 | && !tz->trips.passive.flags.valid) { | |
1da177e4 LT |
1243 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
1244 | } else { | |
1245 | /* _ACx and _PSV are optional, but _CRT is required */ | |
1246 | tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | /* Get default polling frequency [_TZP] (optional) */ | |
1251 | if (tzp) | |
1252 | tz->polling_frequency = tzp; | |
1253 | else | |
1254 | acpi_thermal_get_polling_frequency(tz); | |
1255 | ||
1256 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1257 | result = acpi_thermal_get_devices(tz); | |
1258 | if (!result) | |
1259 | tz->flags.devices = 1; | |
1260 | ||
d550d98d | 1261 | return 0; |
1da177e4 LT |
1262 | } |
1263 | ||
4be44fcd | 1264 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1265 | { |
4be44fcd LB |
1266 | int result = 0; |
1267 | acpi_status status = AE_OK; | |
1268 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1269 | |
1da177e4 LT |
1270 | |
1271 | if (!device) | |
d550d98d | 1272 | return -EINVAL; |
1da177e4 LT |
1273 | |
1274 | tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); | |
1275 | if (!tz) | |
d550d98d | 1276 | return -ENOMEM; |
1da177e4 LT |
1277 | memset(tz, 0, sizeof(struct acpi_thermal)); |
1278 | ||
8348e1b1 | 1279 | tz->device = device; |
1da177e4 LT |
1280 | strcpy(tz->name, device->pnp.bus_id); |
1281 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1282 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1283 | acpi_driver_data(device) = tz; | |
1284 | ||
1285 | result = acpi_thermal_get_info(tz); | |
1286 | if (result) | |
1287 | goto end; | |
1288 | ||
1289 | result = acpi_thermal_add_fs(device); | |
1290 | if (result) | |
09047e75 | 1291 | goto end; |
1da177e4 LT |
1292 | |
1293 | init_timer(&tz->timer); | |
1294 | ||
1295 | acpi_thermal_check(tz); | |
1296 | ||
38ba7c9e | 1297 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1298 | ACPI_DEVICE_NOTIFY, |
1299 | acpi_thermal_notify, tz); | |
1da177e4 | 1300 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1301 | result = -ENODEV; |
1302 | goto end; | |
1303 | } | |
1304 | ||
1305 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1306 | acpi_device_name(device), acpi_device_bid(device), |
1307 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1308 | |
4be44fcd | 1309 | end: |
1da177e4 LT |
1310 | if (result) { |
1311 | acpi_thermal_remove_fs(device); | |
1312 | kfree(tz); | |
1313 | } | |
1314 | ||
d550d98d | 1315 | return result; |
1da177e4 LT |
1316 | } |
1317 | ||
4be44fcd | 1318 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1319 | { |
4be44fcd LB |
1320 | acpi_status status = AE_OK; |
1321 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1322 | |
1da177e4 LT |
1323 | |
1324 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1325 | return -EINVAL; |
1da177e4 | 1326 | |
4be44fcd | 1327 | tz = (struct acpi_thermal *)acpi_driver_data(device); |
1da177e4 LT |
1328 | |
1329 | /* avoid timer adding new defer task */ | |
1330 | tz->zombie = 1; | |
1331 | /* wait for running timer (on other CPUs) finish */ | |
1332 | del_timer_sync(&(tz->timer)); | |
1333 | /* synchronize deferred task */ | |
1334 | acpi_os_wait_events_complete(NULL); | |
1335 | /* deferred task may reinsert timer */ | |
1336 | del_timer_sync(&(tz->timer)); | |
1337 | ||
38ba7c9e | 1338 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1339 | ACPI_DEVICE_NOTIFY, |
1340 | acpi_thermal_notify); | |
1da177e4 LT |
1341 | |
1342 | /* Terminate policy */ | |
4be44fcd | 1343 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1344 | tz->trips.passive.flags.enabled = 0; |
1345 | acpi_thermal_passive(tz); | |
1346 | } | |
1347 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1348 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1349 | tz->trips.active[0].flags.enabled = 0; |
1350 | acpi_thermal_active(tz); | |
1351 | } | |
1352 | ||
1353 | acpi_thermal_remove_fs(device); | |
1354 | ||
1355 | kfree(tz); | |
d550d98d | 1356 | return 0; |
1da177e4 LT |
1357 | } |
1358 | ||
74ce1468 KK |
1359 | static int acpi_thermal_resume(struct acpi_device *device, int state) |
1360 | { | |
1361 | struct acpi_thermal *tz = NULL; | |
1362 | ||
1363 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1364 | return -EINVAL; |
74ce1468 KK |
1365 | |
1366 | tz = (struct acpi_thermal *)acpi_driver_data(device); | |
1367 | ||
1368 | acpi_thermal_check(tz); | |
1369 | ||
1370 | return AE_OK; | |
1371 | } | |
1372 | ||
4be44fcd | 1373 | static int __init acpi_thermal_init(void) |
1da177e4 | 1374 | { |
4be44fcd | 1375 | int result = 0; |
1da177e4 | 1376 | |
1da177e4 LT |
1377 | |
1378 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1379 | if (!acpi_thermal_dir) | |
d550d98d | 1380 | return -ENODEV; |
1da177e4 LT |
1381 | acpi_thermal_dir->owner = THIS_MODULE; |
1382 | ||
1383 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1384 | if (result < 0) { | |
1385 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1386 | return -ENODEV; |
1da177e4 LT |
1387 | } |
1388 | ||
d550d98d | 1389 | return 0; |
1da177e4 LT |
1390 | } |
1391 | ||
4be44fcd | 1392 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1393 | { |
1da177e4 LT |
1394 | |
1395 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1396 | ||
1397 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1398 | ||
d550d98d | 1399 | return; |
1da177e4 LT |
1400 | } |
1401 | ||
1da177e4 LT |
1402 | module_init(acpi_thermal_init); |
1403 | module_exit(acpi_thermal_exit); |