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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 | |
73 | ACPI_MODULE_NAME ("acpi_thermal") | |
74 | ||
75 | MODULE_AUTHOR("Paul Diefenbaugh"); | |
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 | ||
83 | ||
84 | static int acpi_thermal_add (struct acpi_device *device); | |
85 | static int acpi_thermal_remove (struct acpi_device *device, int type); | |
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); | |
89 | static ssize_t acpi_thermal_write_trip_points (struct file*,const char __user *,size_t,loff_t *); | |
90 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); | |
91 | static ssize_t acpi_thermal_write_cooling_mode (struct file*,const char __user *,size_t,loff_t *); | |
92 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); | |
93 | static ssize_t acpi_thermal_write_polling(struct file*,const char __user *,size_t,loff_t *); | |
94 | ||
95 | static struct acpi_driver acpi_thermal_driver = { | |
96 | .name = ACPI_THERMAL_DRIVER_NAME, | |
97 | .class = ACPI_THERMAL_CLASS, | |
98 | .ids = ACPI_THERMAL_HID, | |
99 | .ops = { | |
100 | .add = acpi_thermal_add, | |
101 | .remove = acpi_thermal_remove, | |
102 | }, | |
103 | }; | |
104 | ||
105 | struct acpi_thermal_state { | |
106 | u8 critical:1; | |
107 | u8 hot:1; | |
108 | u8 passive:1; | |
109 | u8 active:1; | |
110 | u8 reserved:4; | |
111 | int active_index; | |
112 | }; | |
113 | ||
114 | struct acpi_thermal_state_flags { | |
115 | u8 valid:1; | |
116 | u8 enabled:1; | |
117 | u8 reserved:6; | |
118 | }; | |
119 | ||
120 | struct acpi_thermal_critical { | |
121 | struct acpi_thermal_state_flags flags; | |
122 | unsigned long temperature; | |
123 | }; | |
124 | ||
125 | struct acpi_thermal_hot { | |
126 | struct acpi_thermal_state_flags flags; | |
127 | unsigned long temperature; | |
128 | }; | |
129 | ||
130 | struct acpi_thermal_passive { | |
131 | struct acpi_thermal_state_flags flags; | |
132 | unsigned long temperature; | |
133 | unsigned long tc1; | |
134 | unsigned long tc2; | |
135 | unsigned long tsp; | |
136 | struct acpi_handle_list devices; | |
137 | }; | |
138 | ||
139 | struct acpi_thermal_active { | |
140 | struct acpi_thermal_state_flags flags; | |
141 | unsigned long temperature; | |
142 | struct acpi_handle_list devices; | |
143 | }; | |
144 | ||
145 | struct acpi_thermal_trips { | |
146 | struct acpi_thermal_critical critical; | |
147 | struct acpi_thermal_hot hot; | |
148 | struct acpi_thermal_passive passive; | |
149 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
150 | }; | |
151 | ||
152 | struct acpi_thermal_flags { | |
153 | u8 cooling_mode:1; /* _SCP */ | |
154 | u8 devices:1; /* _TZD */ | |
155 | u8 reserved:6; | |
156 | }; | |
157 | ||
158 | struct acpi_thermal { | |
159 | acpi_handle handle; | |
160 | acpi_bus_id name; | |
161 | unsigned long temperature; | |
162 | unsigned long last_temperature; | |
163 | unsigned long polling_frequency; | |
164 | u8 cooling_mode; | |
165 | volatile u8 zombie; | |
166 | struct acpi_thermal_flags flags; | |
167 | struct acpi_thermal_state state; | |
168 | struct acpi_thermal_trips trips; | |
169 | struct acpi_handle_list devices; | |
170 | struct timer_list timer; | |
171 | }; | |
172 | ||
173 | static struct file_operations acpi_thermal_state_fops = { | |
174 | .open = acpi_thermal_state_open_fs, | |
175 | .read = seq_read, | |
176 | .llseek = seq_lseek, | |
177 | .release = single_release, | |
178 | }; | |
179 | ||
180 | static struct file_operations acpi_thermal_temp_fops = { | |
181 | .open = acpi_thermal_temp_open_fs, | |
182 | .read = seq_read, | |
183 | .llseek = seq_lseek, | |
184 | .release = single_release, | |
185 | }; | |
186 | ||
187 | static struct file_operations acpi_thermal_trip_fops = { | |
188 | .open = acpi_thermal_trip_open_fs, | |
189 | .read = seq_read, | |
190 | .write = acpi_thermal_write_trip_points, | |
191 | .llseek = seq_lseek, | |
192 | .release = single_release, | |
193 | }; | |
194 | ||
195 | static struct file_operations acpi_thermal_cooling_fops = { | |
196 | .open = acpi_thermal_cooling_open_fs, | |
197 | .read = seq_read, | |
198 | .write = acpi_thermal_write_cooling_mode, | |
199 | .llseek = seq_lseek, | |
200 | .release = single_release, | |
201 | }; | |
202 | ||
203 | static struct file_operations acpi_thermal_polling_fops = { | |
204 | .open = acpi_thermal_polling_open_fs, | |
205 | .read = seq_read, | |
206 | .write = acpi_thermal_write_polling, | |
207 | .llseek = seq_lseek, | |
208 | .release = single_release, | |
209 | }; | |
210 | ||
211 | /* -------------------------------------------------------------------------- | |
212 | Thermal Zone Management | |
213 | -------------------------------------------------------------------------- */ | |
214 | ||
215 | static int | |
216 | acpi_thermal_get_temperature ( | |
217 | struct acpi_thermal *tz) | |
218 | { | |
219 | acpi_status status = AE_OK; | |
220 | ||
221 | ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature"); | |
222 | ||
223 | if (!tz) | |
224 | return_VALUE(-EINVAL); | |
225 | ||
226 | tz->last_temperature = tz->temperature; | |
227 | ||
228 | status = acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); | |
229 | if (ACPI_FAILURE(status)) | |
230 | return_VALUE(-ENODEV); | |
231 | ||
232 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", tz->temperature)); | |
233 | ||
234 | return_VALUE(0); | |
235 | } | |
236 | ||
237 | ||
238 | static int | |
239 | acpi_thermal_get_polling_frequency ( | |
240 | struct acpi_thermal *tz) | |
241 | { | |
242 | acpi_status status = AE_OK; | |
243 | ||
244 | ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency"); | |
245 | ||
246 | if (!tz) | |
247 | return_VALUE(-EINVAL); | |
248 | ||
249 | status = acpi_evaluate_integer(tz->handle, "_TZP", NULL, &tz->polling_frequency); | |
250 | if (ACPI_FAILURE(status)) | |
251 | return_VALUE(-ENODEV); | |
252 | ||
253 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", tz->polling_frequency)); | |
254 | ||
255 | return_VALUE(0); | |
256 | } | |
257 | ||
258 | ||
259 | static int | |
260 | acpi_thermal_set_polling ( | |
261 | struct acpi_thermal *tz, | |
262 | int seconds) | |
263 | { | |
264 | ACPI_FUNCTION_TRACE("acpi_thermal_set_polling"); | |
265 | ||
266 | if (!tz) | |
267 | return_VALUE(-EINVAL); | |
268 | ||
269 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
270 | ||
271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency set to %lu seconds\n", tz->polling_frequency)); | |
272 | ||
273 | return_VALUE(0); | |
274 | } | |
275 | ||
276 | ||
277 | static int | |
278 | acpi_thermal_set_cooling_mode ( | |
279 | struct acpi_thermal *tz, | |
280 | int mode) | |
281 | { | |
282 | acpi_status status = AE_OK; | |
283 | union acpi_object arg0 = {ACPI_TYPE_INTEGER}; | |
284 | struct acpi_object_list arg_list = {1, &arg0}; | |
285 | acpi_handle handle = NULL; | |
286 | ||
287 | ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode"); | |
288 | ||
289 | if (!tz) | |
290 | return_VALUE(-EINVAL); | |
291 | ||
292 | status = acpi_get_handle(tz->handle, "_SCP", &handle); | |
293 | if (ACPI_FAILURE(status)) { | |
294 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
295 | return_VALUE(-ENODEV); | |
296 | } | |
297 | ||
298 | arg0.integer.value = mode; | |
299 | ||
300 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
301 | if (ACPI_FAILURE(status)) | |
302 | return_VALUE(-ENODEV); | |
303 | ||
304 | tz->cooling_mode = mode; | |
305 | ||
306 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", | |
307 | mode?"passive":"active")); | |
308 | ||
309 | return_VALUE(0); | |
310 | } | |
311 | ||
312 | ||
313 | static int | |
314 | acpi_thermal_get_trip_points ( | |
315 | struct acpi_thermal *tz) | |
316 | { | |
317 | acpi_status status = AE_OK; | |
318 | int i = 0; | |
319 | ||
320 | ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points"); | |
321 | ||
322 | if (!tz) | |
323 | return_VALUE(-EINVAL); | |
324 | ||
325 | /* Critical Shutdown (required) */ | |
326 | ||
327 | status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, | |
328 | &tz->trips.critical.temperature); | |
329 | if (ACPI_FAILURE(status)) { | |
330 | tz->trips.critical.flags.valid = 0; | |
331 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n")); | |
332 | return_VALUE(-ENODEV); | |
333 | } | |
334 | else { | |
335 | tz->trips.critical.flags.valid = 1; | |
336 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found critical threshold [%lu]\n", tz->trips.critical.temperature)); | |
337 | } | |
338 | ||
339 | /* Critical Sleep (optional) */ | |
340 | ||
341 | status = acpi_evaluate_integer(tz->handle, "_HOT", NULL, &tz->trips.hot.temperature); | |
342 | if (ACPI_FAILURE(status)) { | |
343 | tz->trips.hot.flags.valid = 0; | |
344 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
345 | } | |
346 | else { | |
347 | tz->trips.hot.flags.valid = 1; | |
348 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", tz->trips.hot.temperature)); | |
349 | } | |
350 | ||
351 | /* Passive: Processors (optional) */ | |
352 | ||
353 | status = acpi_evaluate_integer(tz->handle, "_PSV", NULL, &tz->trips.passive.temperature); | |
354 | if (ACPI_FAILURE(status)) { | |
355 | tz->trips.passive.flags.valid = 0; | |
356 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
357 | } | |
358 | else { | |
359 | tz->trips.passive.flags.valid = 1; | |
360 | ||
361 | status = acpi_evaluate_integer(tz->handle, "_TC1", NULL, &tz->trips.passive.tc1); | |
362 | if (ACPI_FAILURE(status)) | |
363 | tz->trips.passive.flags.valid = 0; | |
364 | ||
365 | status = acpi_evaluate_integer(tz->handle, "_TC2", NULL, &tz->trips.passive.tc2); | |
366 | if (ACPI_FAILURE(status)) | |
367 | tz->trips.passive.flags.valid = 0; | |
368 | ||
369 | status = acpi_evaluate_integer(tz->handle, "_TSP", NULL, &tz->trips.passive.tsp); | |
370 | if (ACPI_FAILURE(status)) | |
371 | tz->trips.passive.flags.valid = 0; | |
372 | ||
373 | status = acpi_evaluate_reference(tz->handle, "_PSL", NULL, &tz->trips.passive.devices); | |
374 | if (ACPI_FAILURE(status)) | |
375 | tz->trips.passive.flags.valid = 0; | |
376 | ||
377 | if (!tz->trips.passive.flags.valid) | |
378 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid passive threshold\n")); | |
379 | else | |
380 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found passive threshold [%lu]\n", tz->trips.passive.temperature)); | |
381 | } | |
382 | ||
383 | /* Active: Fans, etc. (optional) */ | |
384 | ||
385 | for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) { | |
386 | ||
387 | char name[5] = {'_','A','C',('0'+i),'\0'}; | |
388 | ||
389 | status = acpi_evaluate_integer(tz->handle, name, NULL, &tz->trips.active[i].temperature); | |
390 | if (ACPI_FAILURE(status)) | |
391 | break; | |
392 | ||
393 | name[2] = 'L'; | |
394 | status = acpi_evaluate_reference(tz->handle, name, NULL, &tz->trips.active[i].devices); | |
395 | if (ACPI_SUCCESS(status)) { | |
396 | tz->trips.active[i].flags.valid = 1; | |
397 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found active threshold [%d]:[%lu]\n", i, tz->trips.active[i].temperature)); | |
398 | } | |
399 | else | |
400 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid active threshold [%d]\n", i)); | |
401 | } | |
402 | ||
403 | return_VALUE(0); | |
404 | } | |
405 | ||
406 | ||
407 | static int | |
408 | acpi_thermal_get_devices ( | |
409 | struct acpi_thermal *tz) | |
410 | { | |
411 | acpi_status status = AE_OK; | |
412 | ||
413 | ACPI_FUNCTION_TRACE("acpi_thermal_get_devices"); | |
414 | ||
415 | if (!tz) | |
416 | return_VALUE(-EINVAL); | |
417 | ||
418 | status = acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); | |
419 | if (ACPI_FAILURE(status)) | |
420 | return_VALUE(-ENODEV); | |
421 | ||
422 | return_VALUE(0); | |
423 | } | |
424 | ||
425 | ||
426 | static int | |
427 | acpi_thermal_call_usermode ( | |
428 | char *path) | |
429 | { | |
430 | char *argv[2] = {NULL, NULL}; | |
431 | char *envp[3] = {NULL, NULL, NULL}; | |
432 | ||
433 | ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode"); | |
434 | ||
435 | if (!path) | |
436 | return_VALUE(-EINVAL); | |
437 | ||
438 | argv[0] = path; | |
439 | ||
440 | /* minimal command environment */ | |
441 | envp[0] = "HOME=/"; | |
442 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
443 | ||
444 | call_usermodehelper(argv[0], argv, envp, 0); | |
445 | ||
446 | return_VALUE(0); | |
447 | } | |
448 | ||
449 | ||
450 | static int | |
451 | acpi_thermal_critical ( | |
452 | struct acpi_thermal *tz) | |
453 | { | |
454 | int result = 0; | |
455 | struct acpi_device *device = NULL; | |
456 | ||
457 | ACPI_FUNCTION_TRACE("acpi_thermal_critical"); | |
458 | ||
459 | if (!tz || !tz->trips.critical.flags.valid) | |
460 | return_VALUE(-EINVAL); | |
461 | ||
462 | if (tz->temperature >= tz->trips.critical.temperature) { | |
463 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n")); | |
464 | tz->trips.critical.flags.enabled = 1; | |
465 | } | |
466 | else if (tz->trips.critical.flags.enabled) | |
467 | tz->trips.critical.flags.enabled = 0; | |
468 | ||
469 | result = acpi_bus_get_device(tz->handle, &device); | |
470 | if (result) | |
471 | return_VALUE(result); | |
472 | ||
473 | printk(KERN_EMERG "Critical temperature reached (%ld C), shutting down.\n", KELVIN_TO_CELSIUS(tz->temperature)); | |
474 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, tz->trips.critical.flags.enabled); | |
475 | ||
476 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
477 | ||
478 | return_VALUE(0); | |
479 | } | |
480 | ||
481 | ||
482 | static int | |
483 | acpi_thermal_hot ( | |
484 | struct acpi_thermal *tz) | |
485 | { | |
486 | int result = 0; | |
487 | struct acpi_device *device = NULL; | |
488 | ||
489 | ACPI_FUNCTION_TRACE("acpi_thermal_hot"); | |
490 | ||
491 | if (!tz || !tz->trips.hot.flags.valid) | |
492 | return_VALUE(-EINVAL); | |
493 | ||
494 | if (tz->temperature >= tz->trips.hot.temperature) { | |
495 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n")); | |
496 | tz->trips.hot.flags.enabled = 1; | |
497 | } | |
498 | else if (tz->trips.hot.flags.enabled) | |
499 | tz->trips.hot.flags.enabled = 0; | |
500 | ||
501 | result = acpi_bus_get_device(tz->handle, &device); | |
502 | if (result) | |
503 | return_VALUE(result); | |
504 | ||
505 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, tz->trips.hot.flags.enabled); | |
506 | ||
507 | /* TBD: Call user-mode "sleep(S4)" function */ | |
508 | ||
509 | return_VALUE(0); | |
510 | } | |
511 | ||
512 | ||
513 | static int | |
514 | acpi_thermal_passive ( | |
515 | struct acpi_thermal *tz) | |
516 | { | |
517 | int result = 0; | |
518 | struct acpi_thermal_passive *passive = NULL; | |
519 | int trend = 0; | |
520 | int i = 0; | |
521 | ||
522 | ACPI_FUNCTION_TRACE("acpi_thermal_passive"); | |
523 | ||
524 | if (!tz || !tz->trips.passive.flags.valid) | |
525 | return_VALUE(-EINVAL); | |
526 | ||
527 | passive = &(tz->trips.passive); | |
528 | ||
529 | /* | |
530 | * Above Trip? | |
531 | * ----------- | |
532 | * Calculate the thermal trend (using the passive cooling equation) | |
533 | * and modify the performance limit for all passive cooling devices | |
534 | * accordingly. Note that we assume symmetry. | |
535 | */ | |
536 | if (tz->temperature >= passive->temperature) { | |
537 | trend = (passive->tc1 * (tz->temperature - tz->last_temperature)) + (passive->tc2 * (tz->temperature - passive->temperature)); | |
538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
539 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
540 | trend, passive->tc1, tz->temperature, | |
541 | tz->last_temperature, passive->tc2, | |
542 | tz->temperature, passive->temperature)); | |
543 | tz->trips.passive.flags.enabled = 1; | |
544 | /* Heating up? */ | |
545 | if (trend > 0) | |
546 | for (i=0; i<passive->devices.count; i++) | |
547 | acpi_processor_set_thermal_limit( | |
548 | passive->devices.handles[i], | |
549 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
550 | /* Cooling off? */ | |
551 | else if (trend < 0) | |
552 | for (i=0; i<passive->devices.count; i++) | |
553 | acpi_processor_set_thermal_limit( | |
554 | passive->devices.handles[i], | |
555 | ACPI_PROCESSOR_LIMIT_DECREMENT); | |
556 | } | |
557 | ||
558 | /* | |
559 | * Below Trip? | |
560 | * ----------- | |
561 | * Implement passive cooling hysteresis to slowly increase performance | |
562 | * and avoid thrashing around the passive trip point. Note that we | |
563 | * assume symmetry. | |
564 | */ | |
565 | else if (tz->trips.passive.flags.enabled) { | |
566 | for (i=0; i<passive->devices.count; i++) | |
567 | result = acpi_processor_set_thermal_limit( | |
568 | passive->devices.handles[i], | |
569 | ACPI_PROCESSOR_LIMIT_DECREMENT); | |
570 | if (result == 1) { | |
571 | tz->trips.passive.flags.enabled = 0; | |
572 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
573 | "Disabling passive cooling (zone is cool)\n")); | |
574 | } | |
575 | } | |
576 | ||
577 | return_VALUE(0); | |
578 | } | |
579 | ||
580 | ||
581 | static int | |
582 | acpi_thermal_active ( | |
583 | struct acpi_thermal *tz) | |
584 | { | |
585 | int result = 0; | |
586 | struct acpi_thermal_active *active = NULL; | |
587 | int i = 0; | |
588 | int j = 0; | |
589 | unsigned long maxtemp = 0; | |
590 | ||
591 | ACPI_FUNCTION_TRACE("acpi_thermal_active"); | |
592 | ||
593 | if (!tz) | |
594 | return_VALUE(-EINVAL); | |
595 | ||
596 | for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) { | |
597 | ||
598 | active = &(tz->trips.active[i]); | |
599 | if (!active || !active->flags.valid) | |
600 | break; | |
601 | ||
602 | /* | |
603 | * Above Threshold? | |
604 | * ---------------- | |
605 | * If not already enabled, turn ON all cooling devices | |
606 | * associated with this active threshold. | |
607 | */ | |
608 | if (tz->temperature >= active->temperature) { | |
609 | if (active->temperature > maxtemp) | |
610 | tz->state.active_index = i, maxtemp = active->temperature; | |
611 | if (!active->flags.enabled) { | |
612 | for (j = 0; j < active->devices.count; j++) { | |
613 | result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D0); | |
614 | if (result) { | |
615 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to turn cooling device [%p] 'on'\n", active->devices.handles[j])); | |
616 | continue; | |
617 | } | |
618 | active->flags.enabled = 1; | |
619 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling device [%p] now 'on'\n", active->devices.handles[j])); | |
620 | } | |
621 | } | |
622 | } | |
623 | /* | |
624 | * Below Threshold? | |
625 | * ---------------- | |
626 | * Turn OFF all cooling devices associated with this | |
627 | * threshold. | |
628 | */ | |
629 | else if (active->flags.enabled) { | |
630 | for (j = 0; j < active->devices.count; j++) { | |
631 | result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D3); | |
632 | if (result) { | |
633 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to turn cooling device [%p] 'off'\n", active->devices.handles[j])); | |
634 | continue; | |
635 | } | |
636 | active->flags.enabled = 0; | |
637 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling device [%p] now 'off'\n", active->devices.handles[j])); | |
638 | } | |
639 | } | |
640 | } | |
641 | ||
642 | return_VALUE(0); | |
643 | } | |
644 | ||
645 | ||
646 | static void acpi_thermal_check (void *context); | |
647 | ||
648 | static void | |
649 | acpi_thermal_run ( | |
650 | unsigned long data) | |
651 | { | |
652 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
653 | if (!tz->zombie) | |
654 | acpi_os_queue_for_execution(OSD_PRIORITY_GPE, | |
655 | acpi_thermal_check, (void *) data); | |
656 | } | |
657 | ||
658 | ||
659 | static void | |
660 | acpi_thermal_check ( | |
661 | void *data) | |
662 | { | |
663 | int result = 0; | |
664 | struct acpi_thermal *tz = (struct acpi_thermal *) data; | |
665 | unsigned long sleep_time = 0; | |
666 | int i = 0; | |
667 | struct acpi_thermal_state state; | |
668 | ||
669 | ACPI_FUNCTION_TRACE("acpi_thermal_check"); | |
670 | ||
671 | if (!tz) { | |
672 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); | |
673 | return_VOID; | |
674 | } | |
675 | ||
676 | state = tz->state; | |
677 | ||
678 | result = acpi_thermal_get_temperature(tz); | |
679 | if (result) | |
680 | return_VOID; | |
681 | ||
682 | memset(&tz->state, 0, sizeof(tz->state)); | |
683 | ||
684 | /* | |
685 | * Check Trip Points | |
686 | * ----------------- | |
687 | * Compare the current temperature to the trip point values to see | |
688 | * if we've entered one of the thermal policy states. Note that | |
689 | * this function determines when a state is entered, but the | |
690 | * individual policy decides when it is exited (e.g. hysteresis). | |
691 | */ | |
692 | if (tz->trips.critical.flags.valid) | |
693 | state.critical |= (tz->temperature >= tz->trips.critical.temperature); | |
694 | if (tz->trips.hot.flags.valid) | |
695 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
696 | if (tz->trips.passive.flags.valid) | |
697 | state.passive |= (tz->temperature >= tz->trips.passive.temperature); | |
698 | for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) | |
699 | if (tz->trips.active[i].flags.valid) | |
700 | state.active |= (tz->temperature >= tz->trips.active[i].temperature); | |
701 | ||
702 | /* | |
703 | * Invoke Policy | |
704 | * ------------- | |
705 | * Separated from the above check to allow individual policy to | |
706 | * determine when to exit a given state. | |
707 | */ | |
708 | if (state.critical) | |
709 | acpi_thermal_critical(tz); | |
710 | if (state.hot) | |
711 | acpi_thermal_hot(tz); | |
712 | if (state.passive) | |
713 | acpi_thermal_passive(tz); | |
714 | if (state.active) | |
715 | acpi_thermal_active(tz); | |
716 | ||
717 | /* | |
718 | * Calculate State | |
719 | * --------------- | |
720 | * Again, separated from the above two to allow independent policy | |
721 | * decisions. | |
722 | */ | |
723 | if (tz->trips.critical.flags.enabled) | |
724 | tz->state.critical = 1; | |
725 | if (tz->trips.hot.flags.enabled) | |
726 | tz->state.hot = 1; | |
727 | if (tz->trips.passive.flags.enabled) | |
728 | tz->state.passive = 1; | |
729 | for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) | |
730 | if (tz->trips.active[i].flags.enabled) | |
731 | tz->state.active = 1; | |
732 | ||
733 | /* | |
734 | * Calculate Sleep Time | |
735 | * -------------------- | |
736 | * If we're in the passive state, use _TSP's value. Otherwise | |
737 | * use the default polling frequency (e.g. _TZP). If no polling | |
738 | * frequency is specified then we'll wait forever (at least until | |
739 | * a thermal event occurs). Note that _TSP and _TZD values are | |
740 | * given in 1/10th seconds (we must covert to milliseconds). | |
741 | */ | |
742 | if (tz->state.passive) | |
743 | sleep_time = tz->trips.passive.tsp * 100; | |
744 | else if (tz->polling_frequency > 0) | |
745 | sleep_time = tz->polling_frequency * 100; | |
746 | ||
747 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", | |
748 | tz->name, tz->temperature, sleep_time)); | |
749 | ||
750 | /* | |
751 | * Schedule Next Poll | |
752 | * ------------------ | |
753 | */ | |
754 | if (!sleep_time) { | |
755 | if (timer_pending(&(tz->timer))) | |
756 | del_timer(&(tz->timer)); | |
757 | } | |
758 | else { | |
759 | if (timer_pending(&(tz->timer))) | |
760 | mod_timer(&(tz->timer), (HZ * sleep_time) / 1000); | |
761 | else { | |
762 | tz->timer.data = (unsigned long) tz; | |
763 | tz->timer.function = acpi_thermal_run; | |
764 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
765 | add_timer(&(tz->timer)); | |
766 | } | |
767 | } | |
768 | ||
769 | return_VOID; | |
770 | } | |
771 | ||
772 | ||
773 | /* -------------------------------------------------------------------------- | |
774 | FS Interface (/proc) | |
775 | -------------------------------------------------------------------------- */ | |
776 | ||
777 | static struct proc_dir_entry *acpi_thermal_dir; | |
778 | ||
779 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
780 | { | |
781 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
782 | ||
783 | ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show"); | |
784 | ||
785 | if (!tz) | |
786 | goto end; | |
787 | ||
788 | seq_puts(seq, "state: "); | |
789 | ||
790 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive && !tz->state.active) | |
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 | ||
804 | end: | |
805 | return_VALUE(0); | |
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 | ||
813 | ||
814 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) | |
815 | { | |
816 | int result = 0; | |
817 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
818 | ||
819 | ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show"); | |
820 | ||
821 | if (!tz) | |
822 | goto end; | |
823 | ||
824 | result = acpi_thermal_get_temperature(tz); | |
825 | if (result) | |
826 | goto end; | |
827 | ||
828 | seq_printf(seq, "temperature: %ld C\n", | |
829 | KELVIN_TO_CELSIUS(tz->temperature)); | |
830 | ||
831 | end: | |
832 | return_VALUE(0); | |
833 | } | |
834 | ||
835 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
836 | { | |
837 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
838 | } | |
839 | ||
840 | ||
841 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) | |
842 | { | |
843 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
844 | int i = 0; | |
845 | int j = 0; | |
846 | ||
847 | ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show"); | |
848 | ||
849 | if (!tz) | |
850 | goto end; | |
851 | ||
852 | if (tz->trips.critical.flags.valid) | |
853 | seq_printf(seq, "critical (S5): %ld C\n", | |
854 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); | |
855 | ||
856 | if (tz->trips.hot.flags.valid) | |
857 | seq_printf(seq, "hot (S4): %ld C\n", | |
858 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); | |
859 | ||
860 | if (tz->trips.passive.flags.valid) { | |
861 | seq_printf(seq, "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
862 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
863 | tz->trips.passive.tc1, | |
864 | tz->trips.passive.tc2, | |
865 | tz->trips.passive.tsp); | |
866 | for (j=0; j<tz->trips.passive.devices.count; j++) { | |
867 | ||
868 | seq_printf(seq, "0x%p ", tz->trips.passive.devices.handles[j]); | |
869 | } | |
870 | seq_puts(seq, "\n"); | |
871 | } | |
872 | ||
873 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
874 | if (!(tz->trips.active[i].flags.valid)) | |
875 | break; | |
876 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
877 | i, KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
878 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
879 | seq_printf(seq, "0x%p ", | |
880 | tz->trips.active[i].devices.handles[j]); | |
881 | seq_puts(seq, "\n"); | |
882 | } | |
883 | ||
884 | end: | |
885 | return_VALUE(0); | |
886 | } | |
887 | ||
888 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
889 | { | |
890 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
891 | } | |
892 | ||
893 | static ssize_t | |
894 | acpi_thermal_write_trip_points ( | |
895 | struct file *file, | |
896 | const char __user *buffer, | |
897 | size_t count, | |
898 | loff_t *ppos) | |
899 | { | |
900 | struct seq_file *m = (struct seq_file *)file->private_data; | |
901 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
902 | ||
903 | char *limit_string; | |
904 | int num, critical, hot, passive; | |
905 | int *active; | |
906 | int i = 0; | |
907 | ||
908 | ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points"); | |
909 | ||
910 | limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); | |
911 | if(!limit_string) | |
912 | return_VALUE(-ENOMEM); | |
913 | ||
914 | memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); | |
915 | ||
916 | active = kmalloc(ACPI_THERMAL_MAX_ACTIVE *sizeof(int), GFP_KERNEL); | |
917 | if(!active) | |
918 | return_VALUE(-ENOMEM); | |
919 | ||
920 | if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { | |
921 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n")); | |
922 | count = -EINVAL; | |
923 | goto end; | |
924 | } | |
925 | ||
926 | if (copy_from_user(limit_string, buffer, count)) { | |
927 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n")); | |
928 | count = -EFAULT; | |
929 | goto end; | |
930 | } | |
931 | ||
932 | limit_string[count] = '\0'; | |
933 | ||
934 | num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", | |
935 | &critical, &hot, &passive, | |
936 | &active[0], &active[1], &active[2], &active[3], &active[4], | |
937 | &active[5], &active[6], &active[7], &active[8], &active[9]); | |
938 | if(!(num >=5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { | |
939 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); | |
940 | count = -EINVAL; | |
941 | goto end; | |
942 | } | |
943 | ||
944 | tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); | |
945 | tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); | |
946 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); | |
947 | for (i = 0; i < num - 3; i++) { | |
948 | if (!(tz->trips.active[i].flags.valid)) | |
949 | break; | |
950 | tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); | |
951 | } | |
952 | ||
953 | end: | |
954 | kfree(active); | |
955 | kfree(limit_string); | |
956 | return_VALUE(count); | |
957 | } | |
958 | ||
959 | ||
960 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) | |
961 | { | |
962 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
963 | ||
964 | ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show"); | |
965 | ||
966 | if (!tz) | |
967 | goto end; | |
968 | ||
969 | if (!tz->flags.cooling_mode) { | |
970 | seq_puts(seq, "<setting not supported>\n"); | |
971 | } | |
972 | ||
973 | if ( tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL ) | |
974 | seq_printf(seq, "cooling mode: critical\n"); | |
975 | else | |
976 | seq_printf(seq, "cooling mode: %s\n", | |
977 | tz->cooling_mode?"passive":"active"); | |
978 | ||
979 | end: | |
980 | return_VALUE(0); | |
981 | } | |
982 | ||
983 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
984 | { | |
985 | return single_open(file, acpi_thermal_cooling_seq_show, | |
986 | PDE(inode)->data); | |
987 | } | |
988 | ||
989 | static ssize_t | |
990 | acpi_thermal_write_cooling_mode ( | |
991 | struct file *file, | |
992 | const char __user *buffer, | |
993 | size_t count, | |
994 | loff_t *ppos) | |
995 | { | |
996 | struct seq_file *m = (struct seq_file *)file->private_data; | |
997 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
998 | int result = 0; | |
999 | char mode_string[12] = {'\0'}; | |
1000 | ||
1001 | ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode"); | |
1002 | ||
1003 | if (!tz || (count > sizeof(mode_string) - 1)) | |
1004 | return_VALUE(-EINVAL); | |
1005 | ||
1006 | if (!tz->flags.cooling_mode) | |
1007 | return_VALUE(-ENODEV); | |
1008 | ||
1009 | if (copy_from_user(mode_string, buffer, count)) | |
1010 | return_VALUE(-EFAULT); | |
1011 | ||
1012 | mode_string[count] = '\0'; | |
1013 | ||
1014 | result = acpi_thermal_set_cooling_mode(tz, | |
1015 | simple_strtoul(mode_string, NULL, 0)); | |
1016 | if (result) | |
1017 | return_VALUE(result); | |
1018 | ||
1019 | acpi_thermal_check(tz); | |
1020 | ||
1021 | return_VALUE(count); | |
1022 | } | |
1023 | ||
1024 | ||
1025 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) | |
1026 | { | |
1027 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
1028 | ||
1029 | ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show"); | |
1030 | ||
1031 | if (!tz) | |
1032 | goto end; | |
1033 | ||
1034 | if (!tz->polling_frequency) { | |
1035 | seq_puts(seq, "<polling disabled>\n"); | |
1036 | goto end; | |
1037 | } | |
1038 | ||
1039 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
1040 | (tz->polling_frequency / 10)); | |
1041 | ||
1042 | end: | |
1043 | return_VALUE(0); | |
1044 | } | |
1045 | ||
1046 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1047 | { | |
1048 | return single_open(file, acpi_thermal_polling_seq_show, | |
1049 | PDE(inode)->data); | |
1050 | } | |
1051 | ||
1052 | static ssize_t | |
1053 | acpi_thermal_write_polling ( | |
1054 | struct file *file, | |
1055 | const char __user *buffer, | |
1056 | size_t count, | |
1057 | loff_t *ppos) | |
1058 | { | |
1059 | struct seq_file *m = (struct seq_file *)file->private_data; | |
1060 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1061 | int result = 0; | |
1062 | char polling_string[12] = {'\0'}; | |
1063 | int seconds = 0; | |
1064 | ||
1065 | ACPI_FUNCTION_TRACE("acpi_thermal_write_polling"); | |
1066 | ||
1067 | if (!tz || (count > sizeof(polling_string) - 1)) | |
1068 | return_VALUE(-EINVAL); | |
1069 | ||
1070 | if (copy_from_user(polling_string, buffer, count)) | |
1071 | return_VALUE(-EFAULT); | |
1072 | ||
1073 | polling_string[count] = '\0'; | |
1074 | ||
1075 | seconds = simple_strtoul(polling_string, NULL, 0); | |
1076 | ||
1077 | result = acpi_thermal_set_polling(tz, seconds); | |
1078 | if (result) | |
1079 | return_VALUE(result); | |
1080 | ||
1081 | acpi_thermal_check(tz); | |
1082 | ||
1083 | return_VALUE(count); | |
1084 | } | |
1085 | ||
1086 | ||
1087 | static int | |
1088 | acpi_thermal_add_fs ( | |
1089 | struct acpi_device *device) | |
1090 | { | |
1091 | struct proc_dir_entry *entry = NULL; | |
1092 | ||
1093 | ACPI_FUNCTION_TRACE("acpi_thermal_add_fs"); | |
1094 | ||
1095 | if (!acpi_device_dir(device)) { | |
1096 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
1097 | acpi_thermal_dir); | |
1098 | if (!acpi_device_dir(device)) | |
1099 | return_VALUE(-ENODEV); | |
1100 | acpi_device_dir(device)->owner = THIS_MODULE; | |
1101 | } | |
1102 | ||
1103 | /* 'state' [R] */ | |
1104 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1105 | S_IRUGO, acpi_device_dir(device)); | |
1106 | if (!entry) | |
1107 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1108 | "Unable to create '%s' fs entry\n", | |
1109 | ACPI_THERMAL_FILE_STATE)); | |
1110 | else { | |
1111 | entry->proc_fops = &acpi_thermal_state_fops; | |
1112 | entry->data = acpi_driver_data(device); | |
1113 | entry->owner = THIS_MODULE; | |
1114 | } | |
1115 | ||
1116 | /* 'temperature' [R] */ | |
1117 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1118 | S_IRUGO, acpi_device_dir(device)); | |
1119 | if (!entry) | |
1120 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1121 | "Unable to create '%s' fs entry\n", | |
1122 | ACPI_THERMAL_FILE_TEMPERATURE)); | |
1123 | else { | |
1124 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1125 | entry->data = acpi_driver_data(device); | |
1126 | entry->owner = THIS_MODULE; | |
1127 | } | |
1128 | ||
1129 | /* 'trip_points' [R/W] */ | |
1130 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1131 | S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device)); | |
1132 | if (!entry) | |
1133 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1134 | "Unable to create '%s' fs entry\n", | |
1135 | ACPI_THERMAL_FILE_TRIP_POINTS)); | |
1136 | else { | |
1137 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1138 | entry->data = acpi_driver_data(device); | |
1139 | entry->owner = THIS_MODULE; | |
1140 | } | |
1141 | ||
1142 | /* 'cooling_mode' [R/W] */ | |
1143 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1144 | S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device)); | |
1145 | if (!entry) | |
1146 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1147 | "Unable to create '%s' fs entry\n", | |
1148 | ACPI_THERMAL_FILE_COOLING_MODE)); | |
1149 | else { | |
1150 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1151 | entry->data = acpi_driver_data(device); | |
1152 | entry->owner = THIS_MODULE; | |
1153 | } | |
1154 | ||
1155 | /* 'polling_frequency' [R/W] */ | |
1156 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1157 | S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device)); | |
1158 | if (!entry) | |
1159 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1160 | "Unable to create '%s' fs entry\n", | |
1161 | ACPI_THERMAL_FILE_POLLING_FREQ)); | |
1162 | else { | |
1163 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1164 | entry->data = acpi_driver_data(device); | |
1165 | entry->owner = THIS_MODULE; | |
1166 | } | |
1167 | ||
1168 | return_VALUE(0); | |
1169 | } | |
1170 | ||
1171 | ||
1172 | static int | |
1173 | acpi_thermal_remove_fs ( | |
1174 | struct acpi_device *device) | |
1175 | { | |
1176 | ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs"); | |
1177 | ||
1178 | if (acpi_device_dir(device)) { | |
1179 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1180 | acpi_device_dir(device)); | |
1181 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1182 | acpi_device_dir(device)); | |
1183 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1184 | acpi_device_dir(device)); | |
1185 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1186 | acpi_device_dir(device)); | |
1187 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1188 | acpi_device_dir(device)); | |
1189 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1190 | acpi_device_dir(device) = NULL; | |
1191 | } | |
1192 | ||
1193 | return_VALUE(0); | |
1194 | } | |
1195 | ||
1196 | ||
1197 | /* -------------------------------------------------------------------------- | |
1198 | Driver Interface | |
1199 | -------------------------------------------------------------------------- */ | |
1200 | ||
1201 | static void | |
1202 | acpi_thermal_notify ( | |
1203 | acpi_handle handle, | |
1204 | u32 event, | |
1205 | void *data) | |
1206 | { | |
1207 | struct acpi_thermal *tz = (struct acpi_thermal *) data; | |
1208 | struct acpi_device *device = NULL; | |
1209 | ||
1210 | ACPI_FUNCTION_TRACE("acpi_thermal_notify"); | |
1211 | ||
1212 | if (!tz) | |
1213 | return_VOID; | |
1214 | ||
1215 | if (acpi_bus_get_device(tz->handle, &device)) | |
1216 | return_VOID; | |
1217 | ||
1218 | switch (event) { | |
1219 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1220 | acpi_thermal_check(tz); | |
1221 | break; | |
1222 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1223 | acpi_thermal_get_trip_points(tz); | |
1224 | acpi_thermal_check(tz); | |
1225 | acpi_bus_generate_event(device, event, 0); | |
1226 | break; | |
1227 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1228 | if (tz->flags.devices) | |
1229 | acpi_thermal_get_devices(tz); | |
1230 | acpi_bus_generate_event(device, event, 0); | |
1231 | break; | |
1232 | default: | |
1233 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1234 | "Unsupported event [0x%x]\n", event)); | |
1235 | break; | |
1236 | } | |
1237 | ||
1238 | return_VOID; | |
1239 | } | |
1240 | ||
1241 | ||
1242 | static int | |
1243 | acpi_thermal_get_info ( | |
1244 | struct acpi_thermal *tz) | |
1245 | { | |
1246 | int result = 0; | |
1247 | ||
1248 | ACPI_FUNCTION_TRACE("acpi_thermal_get_info"); | |
1249 | ||
1250 | if (!tz) | |
1251 | return_VALUE(-EINVAL); | |
1252 | ||
1253 | /* Get temperature [_TMP] (required) */ | |
1254 | result = acpi_thermal_get_temperature(tz); | |
1255 | if (result) | |
1256 | return_VALUE(result); | |
1257 | ||
1258 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1259 | result = acpi_thermal_get_trip_points(tz); | |
1260 | if (result) | |
1261 | return_VALUE(result); | |
1262 | ||
1263 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1264 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
1265 | if (!result) | |
1266 | tz->flags.cooling_mode = 1; | |
1267 | else { | |
1268 | /* Oh,we have not _SCP method. | |
1269 | Generally show cooling_mode by _ACx, _PSV,spec 12.2*/ | |
1270 | tz->flags.cooling_mode = 0; | |
1271 | if ( tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) { | |
1272 | if ( tz->trips.passive.temperature > tz->trips.active[0].temperature ) | |
1273 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; | |
1274 | else | |
1275 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; | |
1276 | } else if ( !tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) { | |
1277 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; | |
1278 | } else if ( tz->trips.active[0].flags.valid && !tz->trips.passive.flags.valid ) { | |
1279 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; | |
1280 | } else { | |
1281 | /* _ACx and _PSV are optional, but _CRT is required */ | |
1282 | tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | /* Get default polling frequency [_TZP] (optional) */ | |
1287 | if (tzp) | |
1288 | tz->polling_frequency = tzp; | |
1289 | else | |
1290 | acpi_thermal_get_polling_frequency(tz); | |
1291 | ||
1292 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1293 | result = acpi_thermal_get_devices(tz); | |
1294 | if (!result) | |
1295 | tz->flags.devices = 1; | |
1296 | ||
1297 | return_VALUE(0); | |
1298 | } | |
1299 | ||
1300 | ||
1301 | static int | |
1302 | acpi_thermal_add ( | |
1303 | struct acpi_device *device) | |
1304 | { | |
1305 | int result = 0; | |
1306 | acpi_status status = AE_OK; | |
1307 | struct acpi_thermal *tz = NULL; | |
1308 | ||
1309 | ACPI_FUNCTION_TRACE("acpi_thermal_add"); | |
1310 | ||
1311 | if (!device) | |
1312 | return_VALUE(-EINVAL); | |
1313 | ||
1314 | tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); | |
1315 | if (!tz) | |
1316 | return_VALUE(-ENOMEM); | |
1317 | memset(tz, 0, sizeof(struct acpi_thermal)); | |
1318 | ||
1319 | tz->handle = device->handle; | |
1320 | strcpy(tz->name, device->pnp.bus_id); | |
1321 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1322 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1323 | acpi_driver_data(device) = tz; | |
1324 | ||
1325 | result = acpi_thermal_get_info(tz); | |
1326 | if (result) | |
1327 | goto end; | |
1328 | ||
1329 | result = acpi_thermal_add_fs(device); | |
1330 | if (result) | |
1331 | return_VALUE(result); | |
1332 | ||
1333 | init_timer(&tz->timer); | |
1334 | ||
1335 | acpi_thermal_check(tz); | |
1336 | ||
1337 | status = acpi_install_notify_handler(tz->handle, | |
1338 | ACPI_DEVICE_NOTIFY, acpi_thermal_notify, tz); | |
1339 | if (ACPI_FAILURE(status)) { | |
1340 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1341 | "Error installing notify handler\n")); | |
1342 | result = -ENODEV; | |
1343 | goto end; | |
1344 | } | |
1345 | ||
1346 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
1347 | acpi_device_name(device), acpi_device_bid(device), | |
1348 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1349 | ||
1350 | end: | |
1351 | if (result) { | |
1352 | acpi_thermal_remove_fs(device); | |
1353 | kfree(tz); | |
1354 | } | |
1355 | ||
1356 | return_VALUE(result); | |
1357 | } | |
1358 | ||
1359 | ||
1360 | static int | |
1361 | acpi_thermal_remove ( | |
1362 | struct acpi_device *device, | |
1363 | int type) | |
1364 | { | |
1365 | acpi_status status = AE_OK; | |
1366 | struct acpi_thermal *tz = NULL; | |
1367 | ||
1368 | ACPI_FUNCTION_TRACE("acpi_thermal_remove"); | |
1369 | ||
1370 | if (!device || !acpi_driver_data(device)) | |
1371 | return_VALUE(-EINVAL); | |
1372 | ||
1373 | tz = (struct acpi_thermal *) acpi_driver_data(device); | |
1374 | ||
1375 | /* avoid timer adding new defer task */ | |
1376 | tz->zombie = 1; | |
1377 | /* wait for running timer (on other CPUs) finish */ | |
1378 | del_timer_sync(&(tz->timer)); | |
1379 | /* synchronize deferred task */ | |
1380 | acpi_os_wait_events_complete(NULL); | |
1381 | /* deferred task may reinsert timer */ | |
1382 | del_timer_sync(&(tz->timer)); | |
1383 | ||
1384 | status = acpi_remove_notify_handler(tz->handle, | |
1385 | ACPI_DEVICE_NOTIFY, acpi_thermal_notify); | |
1386 | if (ACPI_FAILURE(status)) | |
1387 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
1388 | "Error removing notify handler\n")); | |
1389 | ||
1390 | /* Terminate policy */ | |
1391 | if (tz->trips.passive.flags.valid | |
1392 | && tz->trips.passive.flags.enabled) { | |
1393 | tz->trips.passive.flags.enabled = 0; | |
1394 | acpi_thermal_passive(tz); | |
1395 | } | |
1396 | if (tz->trips.active[0].flags.valid | |
1397 | && tz->trips.active[0].flags.enabled) { | |
1398 | tz->trips.active[0].flags.enabled = 0; | |
1399 | acpi_thermal_active(tz); | |
1400 | } | |
1401 | ||
1402 | acpi_thermal_remove_fs(device); | |
1403 | ||
1404 | kfree(tz); | |
1405 | return_VALUE(0); | |
1406 | } | |
1407 | ||
1408 | ||
1409 | static int __init | |
1410 | acpi_thermal_init (void) | |
1411 | { | |
1412 | int result = 0; | |
1413 | ||
1414 | ACPI_FUNCTION_TRACE("acpi_thermal_init"); | |
1415 | ||
1416 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1417 | if (!acpi_thermal_dir) | |
1418 | return_VALUE(-ENODEV); | |
1419 | acpi_thermal_dir->owner = THIS_MODULE; | |
1420 | ||
1421 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1422 | if (result < 0) { | |
1423 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1424 | return_VALUE(-ENODEV); | |
1425 | } | |
1426 | ||
1427 | return_VALUE(0); | |
1428 | } | |
1429 | ||
1430 | ||
1431 | static void __exit | |
1432 | acpi_thermal_exit (void) | |
1433 | { | |
1434 | ACPI_FUNCTION_TRACE("acpi_thermal_exit"); | |
1435 | ||
1436 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1437 | ||
1438 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1439 | ||
1440 | return_VOID; | |
1441 | } | |
1442 | ||
1443 | ||
1444 | module_init(acpi_thermal_init); | |
1445 | module_exit(acpi_thermal_exit); |