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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 LB |
165 | acpi_handle handle; |
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 LB |
231 | status = |
232 | acpi_evaluate_integer(tz->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 LB |
250 | status = |
251 | acpi_evaluate_integer(tz->handle, "_TZP", NULL, | |
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 LT |
287 | |
288 | status = acpi_get_handle(tz->handle, "_SCP", &handle); | |
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 | ||
4be44fcd LB |
319 | status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, |
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 LB |
334 | status = |
335 | acpi_evaluate_integer(tz->handle, "_HOT", NULL, | |
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 LB |
348 | status = |
349 | acpi_evaluate_integer(tz->handle, "_PSV", NULL, | |
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 LB |
357 | status = |
358 | acpi_evaluate_integer(tz->handle, "_TC1", NULL, | |
359 | &tz->trips.passive.tc1); | |
1da177e4 LT |
360 | if (ACPI_FAILURE(status)) |
361 | tz->trips.passive.flags.valid = 0; | |
362 | ||
4be44fcd LB |
363 | status = |
364 | acpi_evaluate_integer(tz->handle, "_TC2", NULL, | |
365 | &tz->trips.passive.tc2); | |
1da177e4 LT |
366 | if (ACPI_FAILURE(status)) |
367 | tz->trips.passive.flags.valid = 0; | |
368 | ||
4be44fcd LB |
369 | status = |
370 | acpi_evaluate_integer(tz->handle, "_TSP", NULL, | |
371 | &tz->trips.passive.tsp); | |
1da177e4 LT |
372 | if (ACPI_FAILURE(status)) |
373 | tz->trips.passive.flags.valid = 0; | |
374 | ||
4be44fcd LB |
375 | status = |
376 | acpi_evaluate_reference(tz->handle, "_PSL", NULL, | |
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 LB |
395 | status = |
396 | acpi_evaluate_integer(tz->handle, name, NULL, | |
397 | &tz->trips.active[i].temperature); | |
1da177e4 LT |
398 | if (ACPI_FAILURE(status)) |
399 | break; | |
400 | ||
401 | name[2] = 'L'; | |
4be44fcd LB |
402 | status = |
403 | acpi_evaluate_reference(tz->handle, name, NULL, | |
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 LB |
426 | status = |
427 | acpi_evaluate_reference(tz->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 | { |
4be44fcd LB |
456 | int result = 0; |
457 | struct acpi_device *device = NULL; | |
1da177e4 | 458 | |
1da177e4 LT |
459 | |
460 | if (!tz || !tz->trips.critical.flags.valid) | |
d550d98d | 461 | return -EINVAL; |
1da177e4 LT |
462 | |
463 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 464 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 465 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 466 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
467 | tz->trips.critical.flags.enabled = 0; |
468 | ||
469 | result = acpi_bus_get_device(tz->handle, &device); | |
470 | if (result) | |
d550d98d | 471 | return result; |
1da177e4 | 472 | |
4be44fcd LB |
473 | printk(KERN_EMERG |
474 | "Critical temperature reached (%ld C), shutting down.\n", | |
475 | KELVIN_TO_CELSIUS(tz->temperature)); | |
476 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, | |
477 | tz->trips.critical.flags.enabled); | |
1da177e4 LT |
478 | |
479 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
480 | ||
d550d98d | 481 | return 0; |
1da177e4 LT |
482 | } |
483 | ||
4be44fcd | 484 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 485 | { |
4be44fcd LB |
486 | int result = 0; |
487 | struct acpi_device *device = NULL; | |
1da177e4 | 488 | |
1da177e4 LT |
489 | |
490 | if (!tz || !tz->trips.hot.flags.valid) | |
d550d98d | 491 | return -EINVAL; |
1da177e4 LT |
492 | |
493 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 494 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 495 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 496 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
497 | tz->trips.hot.flags.enabled = 0; |
498 | ||
499 | result = acpi_bus_get_device(tz->handle, &device); | |
500 | if (result) | |
d550d98d | 501 | return result; |
1da177e4 | 502 | |
4be44fcd LB |
503 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, |
504 | tz->trips.hot.flags.enabled); | |
1da177e4 LT |
505 | |
506 | /* TBD: Call user-mode "sleep(S4)" function */ | |
507 | ||
d550d98d | 508 | return 0; |
1da177e4 LT |
509 | } |
510 | ||
1cbf4c56 | 511 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 512 | { |
1cbf4c56 | 513 | int result = 1; |
1da177e4 | 514 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
515 | int trend = 0; |
516 | int i = 0; | |
1da177e4 | 517 | |
1da177e4 LT |
518 | |
519 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 520 | return; |
1da177e4 LT |
521 | |
522 | passive = &(tz->trips.passive); | |
523 | ||
524 | /* | |
525 | * Above Trip? | |
526 | * ----------- | |
527 | * Calculate the thermal trend (using the passive cooling equation) | |
528 | * and modify the performance limit for all passive cooling devices | |
529 | * accordingly. Note that we assume symmetry. | |
530 | */ | |
531 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
532 | trend = |
533 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
534 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
536 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
537 | trend, passive->tc1, tz->temperature, | |
538 | tz->last_temperature, passive->tc2, | |
539 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 540 | passive->flags.enabled = 1; |
1da177e4 LT |
541 | /* Heating up? */ |
542 | if (trend > 0) | |
4be44fcd LB |
543 | for (i = 0; i < passive->devices.count; i++) |
544 | acpi_processor_set_thermal_limit(passive-> | |
545 | devices. | |
546 | handles[i], | |
547 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 548 | /* Cooling off? */ |
1cbf4c56 | 549 | else if (trend < 0) { |
4be44fcd | 550 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
551 | /* |
552 | * assume that we are on highest | |
553 | * freq/lowest thrott and can leave | |
554 | * passive mode, even in error case | |
555 | */ | |
556 | if (!acpi_processor_set_thermal_limit | |
557 | (passive->devices.handles[i], | |
558 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
559 | result = 0; | |
560 | /* | |
561 | * Leave cooling mode, even if the temp might | |
562 | * higher than trip point This is because some | |
563 | * machines might have long thermal polling | |
564 | * frequencies (tsp) defined. We will fall back | |
565 | * into passive mode in next cycle (probably quicker) | |
566 | */ | |
567 | if (result) { | |
568 | passive->flags.enabled = 0; | |
569 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
570 | "Disabling passive cooling, still above threshold," | |
571 | " but we are cooling down\n")); | |
572 | } | |
573 | } | |
574 | return; | |
1da177e4 LT |
575 | } |
576 | ||
577 | /* | |
578 | * Below Trip? | |
579 | * ----------- | |
580 | * Implement passive cooling hysteresis to slowly increase performance | |
581 | * and avoid thrashing around the passive trip point. Note that we | |
582 | * assume symmetry. | |
583 | */ | |
1cbf4c56 TR |
584 | if (!passive->flags.enabled) |
585 | return; | |
586 | for (i = 0; i < passive->devices.count; i++) | |
587 | if (!acpi_processor_set_thermal_limit | |
588 | (passive->devices.handles[i], | |
589 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
590 | result = 0; | |
591 | if (result) { | |
592 | passive->flags.enabled = 0; | |
593 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
594 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 595 | } |
1da177e4 LT |
596 | } |
597 | ||
1cbf4c56 | 598 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 599 | { |
4be44fcd | 600 | int result = 0; |
1da177e4 | 601 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
602 | int i = 0; |
603 | int j = 0; | |
604 | unsigned long maxtemp = 0; | |
1da177e4 | 605 | |
1da177e4 LT |
606 | |
607 | if (!tz) | |
1cbf4c56 | 608 | return; |
1da177e4 | 609 | |
4be44fcd | 610 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
611 | active = &(tz->trips.active[i]); |
612 | if (!active || !active->flags.valid) | |
613 | break; | |
1da177e4 | 614 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
615 | /* |
616 | * Above Threshold? | |
617 | * ---------------- | |
618 | * If not already enabled, turn ON all cooling devices | |
619 | * associated with this active threshold. | |
620 | */ | |
1da177e4 | 621 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
622 | tz->state.active_index = i; |
623 | maxtemp = active->temperature; | |
624 | if (active->flags.enabled) | |
625 | continue; | |
1da177e4 | 626 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
627 | result = |
628 | acpi_bus_set_power(active->devices. | |
629 | handles[j], | |
1cbf4c56 | 630 | ACPI_STATE_D0); |
1da177e4 | 631 | if (result) { |
cece9296 LB |
632 | printk(KERN_WARNING PREFIX |
633 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 634 | active->devices. |
cece9296 | 635 | handles[j]); |
1da177e4 LT |
636 | continue; |
637 | } | |
1cbf4c56 | 638 | active->flags.enabled = 1; |
4be44fcd | 639 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 640 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 641 | active->devices.handles[j])); |
1da177e4 | 642 | } |
1cbf4c56 TR |
643 | continue; |
644 | } | |
645 | if (!active->flags.enabled) | |
646 | continue; | |
647 | /* | |
648 | * Below Threshold? | |
649 | * ---------------- | |
650 | * Turn OFF all cooling devices associated with this | |
651 | * threshold. | |
652 | */ | |
653 | for (j = 0; j < active->devices.count; j++) { | |
654 | result = acpi_bus_set_power(active->devices.handles[j], | |
655 | ACPI_STATE_D3); | |
656 | if (result) { | |
cece9296 LB |
657 | printk(KERN_WARNING PREFIX |
658 | "Unable to turn cooling device [%p] 'off'\n", | |
659 | active->devices.handles[j]); | |
1cbf4c56 TR |
660 | continue; |
661 | } | |
662 | active->flags.enabled = 0; | |
663 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
664 | "Cooling device [%p] now 'off'\n", | |
665 | active->devices.handles[j])); | |
1da177e4 LT |
666 | } |
667 | } | |
1da177e4 LT |
668 | } |
669 | ||
4be44fcd | 670 | static void acpi_thermal_check(void *context); |
1da177e4 | 671 | |
4be44fcd | 672 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
673 | { |
674 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
675 | if (!tz->zombie) | |
b8d35192 | 676 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
677 | } |
678 | ||
4be44fcd | 679 | static void acpi_thermal_check(void *data) |
1da177e4 | 680 | { |
4be44fcd LB |
681 | int result = 0; |
682 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
683 | unsigned long sleep_time = 0; | |
684 | int i = 0; | |
1da177e4 LT |
685 | struct acpi_thermal_state state; |
686 | ||
1da177e4 LT |
687 | |
688 | if (!tz) { | |
6468463a | 689 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 690 | return; |
1da177e4 LT |
691 | } |
692 | ||
693 | state = tz->state; | |
694 | ||
695 | result = acpi_thermal_get_temperature(tz); | |
696 | if (result) | |
d550d98d | 697 | return; |
4be44fcd | 698 | |
1da177e4 | 699 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 700 | |
1da177e4 LT |
701 | /* |
702 | * Check Trip Points | |
703 | * ----------------- | |
704 | * Compare the current temperature to the trip point values to see | |
705 | * if we've entered one of the thermal policy states. Note that | |
706 | * this function determines when a state is entered, but the | |
707 | * individual policy decides when it is exited (e.g. hysteresis). | |
708 | */ | |
709 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
710 | state.critical |= |
711 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
712 | if (tz->trips.hot.flags.valid) |
713 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
714 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
715 | state.passive |= |
716 | (tz->temperature >= tz->trips.passive.temperature); | |
717 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 718 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
719 | state.active |= |
720 | (tz->temperature >= | |
721 | tz->trips.active[i].temperature); | |
1da177e4 LT |
722 | |
723 | /* | |
724 | * Invoke Policy | |
725 | * ------------- | |
726 | * Separated from the above check to allow individual policy to | |
727 | * determine when to exit a given state. | |
728 | */ | |
729 | if (state.critical) | |
730 | acpi_thermal_critical(tz); | |
731 | if (state.hot) | |
732 | acpi_thermal_hot(tz); | |
733 | if (state.passive) | |
734 | acpi_thermal_passive(tz); | |
735 | if (state.active) | |
736 | acpi_thermal_active(tz); | |
737 | ||
738 | /* | |
739 | * Calculate State | |
740 | * --------------- | |
741 | * Again, separated from the above two to allow independent policy | |
742 | * decisions. | |
743 | */ | |
1cbf4c56 TR |
744 | tz->state.critical = tz->trips.critical.flags.enabled; |
745 | tz->state.hot = tz->trips.hot.flags.enabled; | |
746 | tz->state.passive = tz->trips.passive.flags.enabled; | |
747 | tz->state.active = 0; | |
4be44fcd | 748 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 749 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
750 | |
751 | /* | |
752 | * Calculate Sleep Time | |
753 | * -------------------- | |
754 | * If we're in the passive state, use _TSP's value. Otherwise | |
755 | * use the default polling frequency (e.g. _TZP). If no polling | |
756 | * frequency is specified then we'll wait forever (at least until | |
757 | * a thermal event occurs). Note that _TSP and _TZD values are | |
758 | * given in 1/10th seconds (we must covert to milliseconds). | |
759 | */ | |
760 | if (tz->state.passive) | |
761 | sleep_time = tz->trips.passive.tsp * 100; | |
762 | else if (tz->polling_frequency > 0) | |
763 | sleep_time = tz->polling_frequency * 100; | |
764 | ||
4be44fcd LB |
765 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
766 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
767 | |
768 | /* | |
769 | * Schedule Next Poll | |
770 | * ------------------ | |
771 | */ | |
772 | if (!sleep_time) { | |
773 | if (timer_pending(&(tz->timer))) | |
774 | del_timer(&(tz->timer)); | |
4be44fcd | 775 | } else { |
1da177e4 LT |
776 | if (timer_pending(&(tz->timer))) |
777 | mod_timer(&(tz->timer), (HZ * sleep_time) / 1000); | |
778 | else { | |
4be44fcd | 779 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
780 | tz->timer.function = acpi_thermal_run; |
781 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
782 | add_timer(&(tz->timer)); | |
783 | } | |
784 | } | |
785 | ||
d550d98d | 786 | return; |
1da177e4 LT |
787 | } |
788 | ||
1da177e4 LT |
789 | /* -------------------------------------------------------------------------- |
790 | FS Interface (/proc) | |
791 | -------------------------------------------------------------------------- */ | |
792 | ||
4be44fcd | 793 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
794 | |
795 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
796 | { | |
4be44fcd | 797 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 798 | |
1da177e4 LT |
799 | |
800 | if (!tz) | |
801 | goto end; | |
802 | ||
803 | seq_puts(seq, "state: "); | |
804 | ||
4be44fcd LB |
805 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
806 | && !tz->state.active) | |
1da177e4 LT |
807 | seq_puts(seq, "ok\n"); |
808 | else { | |
809 | if (tz->state.critical) | |
810 | seq_puts(seq, "critical "); | |
811 | if (tz->state.hot) | |
812 | seq_puts(seq, "hot "); | |
813 | if (tz->state.passive) | |
814 | seq_puts(seq, "passive "); | |
815 | if (tz->state.active) | |
816 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
817 | seq_puts(seq, "\n"); | |
818 | } | |
819 | ||
4be44fcd | 820 | end: |
d550d98d | 821 | return 0; |
1da177e4 LT |
822 | } |
823 | ||
824 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
825 | { | |
826 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
827 | } | |
828 | ||
1da177e4 LT |
829 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
830 | { | |
4be44fcd LB |
831 | int result = 0; |
832 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
1da177e4 | 833 | |
1da177e4 LT |
834 | |
835 | if (!tz) | |
836 | goto end; | |
837 | ||
838 | result = acpi_thermal_get_temperature(tz); | |
839 | if (result) | |
840 | goto end; | |
841 | ||
4be44fcd LB |
842 | seq_printf(seq, "temperature: %ld C\n", |
843 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 844 | |
4be44fcd | 845 | end: |
d550d98d | 846 | return 0; |
1da177e4 LT |
847 | } |
848 | ||
849 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
850 | { | |
851 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
852 | } | |
853 | ||
1da177e4 LT |
854 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
855 | { | |
4be44fcd LB |
856 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
857 | int i = 0; | |
858 | int j = 0; | |
1da177e4 | 859 | |
1da177e4 LT |
860 | |
861 | if (!tz) | |
862 | goto end; | |
863 | ||
864 | if (tz->trips.critical.flags.valid) | |
865 | seq_printf(seq, "critical (S5): %ld C\n", | |
4be44fcd | 866 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); |
1da177e4 LT |
867 | |
868 | if (tz->trips.hot.flags.valid) | |
869 | seq_printf(seq, "hot (S4): %ld C\n", | |
4be44fcd | 870 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); |
1da177e4 LT |
871 | |
872 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
873 | seq_printf(seq, |
874 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
875 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
876 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
877 | tz->trips.passive.tsp); | |
878 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
879 | ||
880 | seq_printf(seq, "0x%p ", | |
881 | tz->trips.passive.devices.handles[j]); | |
1da177e4 LT |
882 | } |
883 | seq_puts(seq, "\n"); | |
884 | } | |
885 | ||
886 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
887 | if (!(tz->trips.active[i].flags.valid)) | |
888 | break; | |
889 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
890 | i, |
891 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
892 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
1da177e4 | 893 | seq_printf(seq, "0x%p ", |
4be44fcd | 894 | tz->trips.active[i].devices.handles[j]); |
1da177e4 LT |
895 | seq_puts(seq, "\n"); |
896 | } | |
897 | ||
4be44fcd | 898 | end: |
d550d98d | 899 | return 0; |
1da177e4 LT |
900 | } |
901 | ||
902 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
903 | { | |
904 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
905 | } | |
906 | ||
907 | static ssize_t | |
4be44fcd LB |
908 | acpi_thermal_write_trip_points(struct file *file, |
909 | const char __user * buffer, | |
910 | size_t count, loff_t * ppos) | |
1da177e4 | 911 | { |
4be44fcd LB |
912 | struct seq_file *m = (struct seq_file *)file->private_data; |
913 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1da177e4 | 914 | |
4be44fcd LB |
915 | char *limit_string; |
916 | int num, critical, hot, passive; | |
917 | int *active; | |
918 | int i = 0; | |
1da177e4 | 919 | |
1da177e4 LT |
920 | |
921 | limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); | |
4be44fcd | 922 | if (!limit_string) |
d550d98d | 923 | return -ENOMEM; |
1da177e4 LT |
924 | |
925 | memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); | |
926 | ||
4be44fcd | 927 | active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); |
fdc136cc DJ |
928 | if (!active) { |
929 | kfree(limit_string); | |
d550d98d | 930 | return -ENOMEM; |
fdc136cc | 931 | } |
1da177e4 LT |
932 | |
933 | if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { | |
1da177e4 LT |
934 | count = -EINVAL; |
935 | goto end; | |
936 | } | |
4be44fcd | 937 | |
1da177e4 | 938 | if (copy_from_user(limit_string, buffer, count)) { |
1da177e4 LT |
939 | count = -EFAULT; |
940 | goto end; | |
941 | } | |
4be44fcd | 942 | |
1da177e4 LT |
943 | limit_string[count] = '\0'; |
944 | ||
945 | num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", | |
4be44fcd LB |
946 | &critical, &hot, &passive, |
947 | &active[0], &active[1], &active[2], &active[3], &active[4], | |
948 | &active[5], &active[6], &active[7], &active[8], | |
949 | &active[9]); | |
950 | if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { | |
1da177e4 LT |
951 | count = -EINVAL; |
952 | goto end; | |
953 | } | |
954 | ||
955 | tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); | |
956 | tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); | |
957 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); | |
958 | for (i = 0; i < num - 3; i++) { | |
959 | if (!(tz->trips.active[i].flags.valid)) | |
960 | break; | |
961 | tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); | |
962 | } | |
4be44fcd LB |
963 | |
964 | end: | |
1da177e4 LT |
965 | kfree(active); |
966 | kfree(limit_string); | |
d550d98d | 967 | return count; |
1da177e4 LT |
968 | } |
969 | ||
1da177e4 LT |
970 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
971 | { | |
4be44fcd | 972 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 973 | |
1da177e4 LT |
974 | |
975 | if (!tz) | |
976 | goto end; | |
977 | ||
978 | if (!tz->flags.cooling_mode) { | |
979 | seq_puts(seq, "<setting not supported>\n"); | |
980 | } | |
981 | ||
4be44fcd | 982 | if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) |
1da177e4 LT |
983 | seq_printf(seq, "cooling mode: critical\n"); |
984 | else | |
985 | seq_printf(seq, "cooling mode: %s\n", | |
4be44fcd | 986 | tz->cooling_mode ? "passive" : "active"); |
1da177e4 | 987 | |
4be44fcd | 988 | end: |
d550d98d | 989 | return 0; |
1da177e4 LT |
990 | } |
991 | ||
992 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
993 | { | |
994 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 995 | PDE(inode)->data); |
1da177e4 LT |
996 | } |
997 | ||
998 | static ssize_t | |
4be44fcd LB |
999 | acpi_thermal_write_cooling_mode(struct file *file, |
1000 | const char __user * buffer, | |
1001 | size_t count, loff_t * ppos) | |
1da177e4 | 1002 | { |
4be44fcd LB |
1003 | struct seq_file *m = (struct seq_file *)file->private_data; |
1004 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1005 | int result = 0; | |
1006 | char mode_string[12] = { '\0' }; | |
1da177e4 | 1007 | |
1da177e4 LT |
1008 | |
1009 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 1010 | return -EINVAL; |
1da177e4 LT |
1011 | |
1012 | if (!tz->flags.cooling_mode) | |
d550d98d | 1013 | return -ENODEV; |
1da177e4 LT |
1014 | |
1015 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 1016 | return -EFAULT; |
4be44fcd | 1017 | |
1da177e4 | 1018 | mode_string[count] = '\0'; |
4be44fcd LB |
1019 | |
1020 | result = acpi_thermal_set_cooling_mode(tz, | |
1021 | simple_strtoul(mode_string, NULL, | |
1022 | 0)); | |
1da177e4 | 1023 | if (result) |
d550d98d | 1024 | return result; |
1da177e4 LT |
1025 | |
1026 | acpi_thermal_check(tz); | |
1027 | ||
d550d98d | 1028 | return count; |
1da177e4 LT |
1029 | } |
1030 | ||
1da177e4 LT |
1031 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1032 | { | |
4be44fcd | 1033 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 | 1034 | |
1da177e4 LT |
1035 | |
1036 | if (!tz) | |
1037 | goto end; | |
1038 | ||
1039 | if (!tz->polling_frequency) { | |
1040 | seq_puts(seq, "<polling disabled>\n"); | |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1045 | (tz->polling_frequency / 10)); |
1da177e4 | 1046 | |
4be44fcd | 1047 | end: |
d550d98d | 1048 | return 0; |
1da177e4 LT |
1049 | } |
1050 | ||
1051 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1052 | { | |
1053 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1054 | PDE(inode)->data); |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | static ssize_t | |
4be44fcd LB |
1058 | acpi_thermal_write_polling(struct file *file, |
1059 | const char __user * buffer, | |
1060 | size_t count, loff_t * ppos) | |
1da177e4 | 1061 | { |
4be44fcd LB |
1062 | struct seq_file *m = (struct seq_file *)file->private_data; |
1063 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1064 | int result = 0; | |
1065 | char polling_string[12] = { '\0' }; | |
1066 | int seconds = 0; | |
1da177e4 | 1067 | |
1da177e4 LT |
1068 | |
1069 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1070 | return -EINVAL; |
4be44fcd | 1071 | |
1da177e4 | 1072 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1073 | return -EFAULT; |
4be44fcd | 1074 | |
1da177e4 LT |
1075 | polling_string[count] = '\0'; |
1076 | ||
1077 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1078 | |
1da177e4 LT |
1079 | result = acpi_thermal_set_polling(tz, seconds); |
1080 | if (result) | |
d550d98d | 1081 | return result; |
1da177e4 LT |
1082 | |
1083 | acpi_thermal_check(tz); | |
1084 | ||
d550d98d | 1085 | return count; |
1da177e4 LT |
1086 | } |
1087 | ||
4be44fcd | 1088 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1089 | { |
4be44fcd | 1090 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1091 | |
1da177e4 LT |
1092 | |
1093 | if (!acpi_device_dir(device)) { | |
1094 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1095 | acpi_thermal_dir); |
1da177e4 | 1096 | if (!acpi_device_dir(device)) |
d550d98d | 1097 | return -ENODEV; |
1da177e4 LT |
1098 | acpi_device_dir(device)->owner = THIS_MODULE; |
1099 | } | |
1100 | ||
1101 | /* 'state' [R] */ | |
1102 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1103 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1104 | if (!entry) |
d550d98d | 1105 | return -ENODEV; |
1da177e4 LT |
1106 | else { |
1107 | entry->proc_fops = &acpi_thermal_state_fops; | |
1108 | entry->data = acpi_driver_data(device); | |
1109 | entry->owner = THIS_MODULE; | |
1110 | } | |
1111 | ||
1112 | /* 'temperature' [R] */ | |
1113 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1114 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1115 | if (!entry) |
d550d98d | 1116 | return -ENODEV; |
1da177e4 LT |
1117 | else { |
1118 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1119 | entry->data = acpi_driver_data(device); | |
1120 | entry->owner = THIS_MODULE; | |
1121 | } | |
1122 | ||
1123 | /* 'trip_points' [R/W] */ | |
1124 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1125 | S_IFREG | S_IRUGO | S_IWUSR, |
1126 | acpi_device_dir(device)); | |
1da177e4 | 1127 | if (!entry) |
d550d98d | 1128 | return -ENODEV; |
1da177e4 LT |
1129 | else { |
1130 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1131 | entry->data = acpi_driver_data(device); | |
1132 | entry->owner = THIS_MODULE; | |
1133 | } | |
1134 | ||
1135 | /* 'cooling_mode' [R/W] */ | |
1136 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1137 | S_IFREG | S_IRUGO | S_IWUSR, |
1138 | acpi_device_dir(device)); | |
1da177e4 | 1139 | if (!entry) |
d550d98d | 1140 | return -ENODEV; |
1da177e4 LT |
1141 | else { |
1142 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1143 | entry->data = acpi_driver_data(device); | |
1144 | entry->owner = THIS_MODULE; | |
1145 | } | |
1146 | ||
1147 | /* 'polling_frequency' [R/W] */ | |
1148 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1149 | S_IFREG | S_IRUGO | S_IWUSR, |
1150 | acpi_device_dir(device)); | |
1da177e4 | 1151 | if (!entry) |
d550d98d | 1152 | return -ENODEV; |
1da177e4 LT |
1153 | else { |
1154 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1155 | entry->data = acpi_driver_data(device); | |
1156 | entry->owner = THIS_MODULE; | |
1157 | } | |
1158 | ||
d550d98d | 1159 | return 0; |
1da177e4 LT |
1160 | } |
1161 | ||
4be44fcd | 1162 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1163 | { |
1da177e4 LT |
1164 | |
1165 | if (acpi_device_dir(device)) { | |
1166 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1167 | acpi_device_dir(device)); | |
1168 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1169 | acpi_device_dir(device)); | |
1170 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1171 | acpi_device_dir(device)); | |
1172 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1173 | acpi_device_dir(device)); | |
1174 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1175 | acpi_device_dir(device)); | |
1176 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1177 | acpi_device_dir(device) = NULL; | |
1178 | } | |
1179 | ||
d550d98d | 1180 | return 0; |
1da177e4 LT |
1181 | } |
1182 | ||
1da177e4 LT |
1183 | /* -------------------------------------------------------------------------- |
1184 | Driver Interface | |
1185 | -------------------------------------------------------------------------- */ | |
1186 | ||
4be44fcd | 1187 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1188 | { |
4be44fcd LB |
1189 | struct acpi_thermal *tz = (struct acpi_thermal *)data; |
1190 | struct acpi_device *device = NULL; | |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | |
1193 | if (!tz) | |
d550d98d | 1194 | return; |
1da177e4 LT |
1195 | |
1196 | if (acpi_bus_get_device(tz->handle, &device)) | |
d550d98d | 1197 | return; |
1da177e4 LT |
1198 | |
1199 | switch (event) { | |
1200 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1201 | acpi_thermal_check(tz); | |
1202 | break; | |
1203 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1204 | acpi_thermal_get_trip_points(tz); | |
1205 | acpi_thermal_check(tz); | |
1206 | acpi_bus_generate_event(device, event, 0); | |
1207 | break; | |
1208 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1209 | if (tz->flags.devices) | |
1210 | acpi_thermal_get_devices(tz); | |
1211 | acpi_bus_generate_event(device, event, 0); | |
1212 | break; | |
1213 | default: | |
1214 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1215 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1216 | break; |
1217 | } | |
1218 | ||
d550d98d | 1219 | return; |
1da177e4 LT |
1220 | } |
1221 | ||
4be44fcd | 1222 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1223 | { |
4be44fcd | 1224 | int result = 0; |
1da177e4 | 1225 | |
1da177e4 LT |
1226 | |
1227 | if (!tz) | |
d550d98d | 1228 | return -EINVAL; |
1da177e4 LT |
1229 | |
1230 | /* Get temperature [_TMP] (required) */ | |
1231 | result = acpi_thermal_get_temperature(tz); | |
1232 | if (result) | |
d550d98d | 1233 | return result; |
1da177e4 LT |
1234 | |
1235 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1236 | result = acpi_thermal_get_trip_points(tz); | |
1237 | if (result) | |
d550d98d | 1238 | return result; |
1da177e4 LT |
1239 | |
1240 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1241 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1242 | if (!result) |
1da177e4 | 1243 | tz->flags.cooling_mode = 1; |
4be44fcd | 1244 | else { |
1da177e4 | 1245 | /* Oh,we have not _SCP method. |
4be44fcd | 1246 | Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ |
1da177e4 | 1247 | tz->flags.cooling_mode = 0; |
4be44fcd LB |
1248 | if (tz->trips.active[0].flags.valid |
1249 | && tz->trips.passive.flags.valid) { | |
1250 | if (tz->trips.passive.temperature > | |
1251 | tz->trips.active[0].temperature) | |
1da177e4 | 1252 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
4be44fcd | 1253 | else |
1da177e4 | 1254 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1255 | } else if (!tz->trips.active[0].flags.valid |
1256 | && tz->trips.passive.flags.valid) { | |
1da177e4 | 1257 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1258 | } else if (tz->trips.active[0].flags.valid |
1259 | && !tz->trips.passive.flags.valid) { | |
1da177e4 LT |
1260 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
1261 | } else { | |
1262 | /* _ACx and _PSV are optional, but _CRT is required */ | |
1263 | tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | /* Get default polling frequency [_TZP] (optional) */ | |
1268 | if (tzp) | |
1269 | tz->polling_frequency = tzp; | |
1270 | else | |
1271 | acpi_thermal_get_polling_frequency(tz); | |
1272 | ||
1273 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1274 | result = acpi_thermal_get_devices(tz); | |
1275 | if (!result) | |
1276 | tz->flags.devices = 1; | |
1277 | ||
d550d98d | 1278 | return 0; |
1da177e4 LT |
1279 | } |
1280 | ||
4be44fcd | 1281 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1282 | { |
4be44fcd LB |
1283 | int result = 0; |
1284 | acpi_status status = AE_OK; | |
1285 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1286 | |
1da177e4 LT |
1287 | |
1288 | if (!device) | |
d550d98d | 1289 | return -EINVAL; |
1da177e4 LT |
1290 | |
1291 | tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); | |
1292 | if (!tz) | |
d550d98d | 1293 | return -ENOMEM; |
1da177e4 LT |
1294 | memset(tz, 0, sizeof(struct acpi_thermal)); |
1295 | ||
1296 | tz->handle = device->handle; | |
1297 | strcpy(tz->name, device->pnp.bus_id); | |
1298 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1299 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1300 | acpi_driver_data(device) = tz; | |
1301 | ||
1302 | result = acpi_thermal_get_info(tz); | |
1303 | if (result) | |
1304 | goto end; | |
1305 | ||
1306 | result = acpi_thermal_add_fs(device); | |
1307 | if (result) | |
09047e75 | 1308 | goto end; |
1da177e4 LT |
1309 | |
1310 | init_timer(&tz->timer); | |
1311 | ||
1312 | acpi_thermal_check(tz); | |
1313 | ||
1314 | status = acpi_install_notify_handler(tz->handle, | |
4be44fcd LB |
1315 | ACPI_DEVICE_NOTIFY, |
1316 | acpi_thermal_notify, tz); | |
1da177e4 | 1317 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1318 | result = -ENODEV; |
1319 | goto end; | |
1320 | } | |
1321 | ||
1322 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1323 | acpi_device_name(device), acpi_device_bid(device), |
1324 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1325 | |
4be44fcd | 1326 | end: |
1da177e4 LT |
1327 | if (result) { |
1328 | acpi_thermal_remove_fs(device); | |
1329 | kfree(tz); | |
1330 | } | |
1331 | ||
d550d98d | 1332 | return result; |
1da177e4 LT |
1333 | } |
1334 | ||
4be44fcd | 1335 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1336 | { |
4be44fcd LB |
1337 | acpi_status status = AE_OK; |
1338 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1339 | |
1da177e4 LT |
1340 | |
1341 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1342 | return -EINVAL; |
1da177e4 | 1343 | |
4be44fcd | 1344 | tz = (struct acpi_thermal *)acpi_driver_data(device); |
1da177e4 LT |
1345 | |
1346 | /* avoid timer adding new defer task */ | |
1347 | tz->zombie = 1; | |
1348 | /* wait for running timer (on other CPUs) finish */ | |
1349 | del_timer_sync(&(tz->timer)); | |
1350 | /* synchronize deferred task */ | |
1351 | acpi_os_wait_events_complete(NULL); | |
1352 | /* deferred task may reinsert timer */ | |
1353 | del_timer_sync(&(tz->timer)); | |
1354 | ||
1355 | status = acpi_remove_notify_handler(tz->handle, | |
4be44fcd LB |
1356 | ACPI_DEVICE_NOTIFY, |
1357 | acpi_thermal_notify); | |
1da177e4 LT |
1358 | |
1359 | /* Terminate policy */ | |
4be44fcd | 1360 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1361 | tz->trips.passive.flags.enabled = 0; |
1362 | acpi_thermal_passive(tz); | |
1363 | } | |
1364 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1365 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1366 | tz->trips.active[0].flags.enabled = 0; |
1367 | acpi_thermal_active(tz); | |
1368 | } | |
1369 | ||
1370 | acpi_thermal_remove_fs(device); | |
1371 | ||
1372 | kfree(tz); | |
d550d98d | 1373 | return 0; |
1da177e4 LT |
1374 | } |
1375 | ||
74ce1468 KK |
1376 | static int acpi_thermal_resume(struct acpi_device *device, int state) |
1377 | { | |
1378 | struct acpi_thermal *tz = NULL; | |
1379 | ||
1380 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1381 | return -EINVAL; |
74ce1468 KK |
1382 | |
1383 | tz = (struct acpi_thermal *)acpi_driver_data(device); | |
1384 | ||
1385 | acpi_thermal_check(tz); | |
1386 | ||
1387 | return AE_OK; | |
1388 | } | |
1389 | ||
4be44fcd | 1390 | static int __init acpi_thermal_init(void) |
1da177e4 | 1391 | { |
4be44fcd | 1392 | int result = 0; |
1da177e4 | 1393 | |
1da177e4 LT |
1394 | |
1395 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1396 | if (!acpi_thermal_dir) | |
d550d98d | 1397 | return -ENODEV; |
1da177e4 LT |
1398 | acpi_thermal_dir->owner = THIS_MODULE; |
1399 | ||
1400 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1401 | if (result < 0) { | |
1402 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1403 | return -ENODEV; |
1da177e4 LT |
1404 | } |
1405 | ||
d550d98d | 1406 | return 0; |
1da177e4 LT |
1407 | } |
1408 | ||
4be44fcd | 1409 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1410 | { |
1da177e4 LT |
1411 | |
1412 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1413 | ||
1414 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1415 | ||
d550d98d | 1416 | return; |
1da177e4 LT |
1417 | } |
1418 | ||
1da177e4 LT |
1419 | module_init(acpi_thermal_init); |
1420 | module_exit(acpi_thermal_exit); |