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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Len Brown0b5bfa12007-08-12 00:13:02 -040036#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/types.h>
Tim Schmielaucd354f12007-02-14 00:33:14 -080040#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/kmod.h>
Jeremy Fitzhardinge10a0a8d2007-07-17 18:37:02 -070042#include <linux/reboot.h>
Stephen Rothwellf6f5c452009-03-03 12:47:17 +110043#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/uaccess.h>
Zhang Rui3f655ef2008-01-17 15:51:11 +080045#include <linux/thermal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <acpi/acpi_bus.h>
47#include <acpi/acpi_drivers.h>
48
Len Browna192a952009-07-28 16:45:54 -040049#define PREFIX "ACPI: "
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_THERMAL_CLASS "thermal_zone"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
53#define ACPI_THERMAL_FILE_STATE "state"
54#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
55#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
56#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
57#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
58#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
59#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
60#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
61#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
62#define ACPI_THERMAL_NOTIFY_HOT 0xF1
63#define ACPI_THERMAL_MODE_ACTIVE 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#define ACPI_THERMAL_MAX_ACTIVE 10
66#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#define _COMPONENT ACPI_THERMAL_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050069ACPI_MODULE_NAME("thermal");
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Thomas Renninger1cbf4c52004-09-16 11:07:00 -040071MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050072MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070073MODULE_LICENSE("GPL");
74
Len Brownf8707ec2007-08-12 00:12:54 -040075static int act;
76module_param(act, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040077MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
Len Brownf8707ec2007-08-12 00:12:54 -040078
Len Brownc52a7412007-08-14 15:49:32 -040079static int crt;
80module_param(crt, int, 0644);
81MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static int tzp;
Len Brown730ff342007-08-12 00:12:26 -040084module_param(tzp, int, 0444);
Len Brown3c1d36d2007-08-14 15:12:56 -040085MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Len Brownf5487142007-08-12 00:12:44 -040087static int nocrt;
88module_param(nocrt, int, 0);
Len Brown8c99fdc2007-08-20 18:46:50 -040089MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
Len Brownf5487142007-08-12 00:12:44 -040090
Len Brown72b33ef2007-08-12 00:12:17 -040091static int off;
92module_param(off, int, 0);
Len Brown3c1d36d2007-08-14 15:12:56 -040093MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
Len Brown72b33ef2007-08-12 00:12:17 -040094
Len Browna70cdc52007-08-12 00:12:35 -040095static int psv;
96module_param(psv, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040097MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
Len Browna70cdc52007-08-12 00:12:35 -040098
Len Brown4be44fc2005-08-05 00:44:28 -040099static int acpi_thermal_add(struct acpi_device *device);
100static int acpi_thermal_remove(struct acpi_device *device, int type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800101static int acpi_thermal_resume(struct acpi_device *device);
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000102static void acpi_thermal_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200104static const struct acpi_device_id thermal_device_ids[] = {
105 {ACPI_THERMAL_HID, 0},
106 {"", 0},
107};
108MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110static struct acpi_driver acpi_thermal_driver = {
Len Brownc2b67052007-02-12 23:33:40 -0500111 .name = "thermal",
Len Brown4be44fc2005-08-05 00:44:28 -0400112 .class = ACPI_THERMAL_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200113 .ids = thermal_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -0400114 .ops = {
115 .add = acpi_thermal_add,
116 .remove = acpi_thermal_remove,
Konstantin Karasyov74ce14682006-05-08 08:32:00 -0400117 .resume = acpi_thermal_resume,
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000118 .notify = acpi_thermal_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400119 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120};
121
122struct acpi_thermal_state {
Len Brown4be44fc2005-08-05 00:44:28 -0400123 u8 critical:1;
124 u8 hot:1;
125 u8 passive:1;
126 u8 active:1;
127 u8 reserved:4;
128 int active_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129};
130
131struct acpi_thermal_state_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400132 u8 valid:1;
133 u8 enabled:1;
134 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135};
136
137struct acpi_thermal_critical {
138 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400139 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140};
141
142struct acpi_thermal_hot {
143 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400144 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145};
146
147struct acpi_thermal_passive {
148 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400149 unsigned long temperature;
150 unsigned long tc1;
151 unsigned long tc2;
152 unsigned long tsp;
153 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154};
155
156struct acpi_thermal_active {
157 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400158 unsigned long temperature;
159 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160};
161
162struct acpi_thermal_trips {
163 struct acpi_thermal_critical critical;
Len Brown4be44fc2005-08-05 00:44:28 -0400164 struct acpi_thermal_hot hot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 struct acpi_thermal_passive passive;
166 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
167};
168
169struct acpi_thermal_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400170 u8 cooling_mode:1; /* _SCP */
171 u8 devices:1; /* _TZD */
172 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173};
174
175struct acpi_thermal {
Patrick Mochel8348e1b2006-05-19 16:54:40 -0400176 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -0400177 acpi_bus_id name;
178 unsigned long temperature;
179 unsigned long last_temperature;
180 unsigned long polling_frequency;
Len Brown4be44fc2005-08-05 00:44:28 -0400181 volatile u8 zombie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 struct acpi_thermal_flags flags;
183 struct acpi_thermal_state state;
184 struct acpi_thermal_trips trips;
Len Brown4be44fc2005-08-05 00:44:28 -0400185 struct acpi_handle_list devices;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800186 struct thermal_zone_device *thermal_zone;
187 int tz_enabled;
Jean Delvare13614e32009-04-06 16:01:46 +0200188 int kelvin_offset;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +0400189 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190};
191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192/* --------------------------------------------------------------------------
193 Thermal Zone Management
194 -------------------------------------------------------------------------- */
195
Len Brown4be44fc2005-08-05 00:44:28 -0400196static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Len Brown4be44fc2005-08-05 00:44:28 -0400198 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400199 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400202 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204 tz->last_temperature = tz->temperature;
205
Matthew Wilcox27663c52008-10-10 02:22:59 -0400206 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400208 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Matthew Wilcox27663c52008-10-10 02:22:59 -0400210 tz->temperature = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400211 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
212 tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Patrick Mocheld550d982006-06-27 00:41:40 -0400214 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215}
216
Len Brown4be44fc2005-08-05 00:44:28 -0400217static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
Len Brown4be44fc2005-08-05 00:44:28 -0400219 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400220 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400223 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Matthew Wilcox27663c52008-10-10 02:22:59 -0400225 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400227 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Matthew Wilcox27663c52008-10-10 02:22:59 -0400229 tz->polling_frequency = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400230 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
231 tz->polling_frequency));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Patrick Mocheld550d982006-06-27 00:41:40 -0400233 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
Len Brown4be44fc2005-08-05 00:44:28 -0400236static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Len Brown4be44fc2005-08-05 00:44:28 -0400238 acpi_status status = AE_OK;
239 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
240 struct acpi_object_list arg_list = { 1, &arg0 };
241 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
244 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400245 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Patrick Mochel38ba7c92006-05-19 16:54:48 -0400247 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 if (ACPI_FAILURE(status)) {
249 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400250 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
252
253 arg0.integer.value = mode;
254
255 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
256 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400257 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Patrick Mocheld550d982006-06-27 00:41:40 -0400259 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
Zhang Ruice44e192008-01-17 15:51:25 +0800262#define ACPI_TRIPS_CRITICAL 0x01
263#define ACPI_TRIPS_HOT 0x02
264#define ACPI_TRIPS_PASSIVE 0x04
265#define ACPI_TRIPS_ACTIVE 0x08
266#define ACPI_TRIPS_DEVICES 0x10
267
268#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
269#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
270
271#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
272 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
273 ACPI_TRIPS_DEVICES)
274
275/*
276 * This exception is thrown out in two cases:
277 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
278 * when re-evaluating the AML code.
279 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
280 * We need to re-bind the cooling devices of a thermal zone when this occurs.
281 */
282#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
283do { \
284 if (flags != ACPI_TRIPS_INIT) \
285 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
286 "ACPI thermal trip point %s changed\n" \
287 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
288} while (0)
289
290static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291{
Len Brown4be44fc2005-08-05 00:44:28 -0400292 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400293 unsigned long long tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800294 struct acpi_handle_list devices;
295 int valid = 0;
296 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
Thomas Renningerfa809452010-02-20 11:44:27 +0100298 /* Critical Shutdown */
Zhang Ruice44e192008-01-17 15:51:25 +0800299 if (flag & ACPI_TRIPS_CRITICAL) {
300 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400301 "_CRT", NULL, &tmp);
302 tz->trips.critical.temperature = tmp;
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700303 /*
304 * Treat freezing temperatures as invalid as well; some
305 * BIOSes return really low values and cause reboots at startup.
Adam Buchbinderb731d7b2009-03-13 12:15:26 -0400306 * Below zero (Celsius) values clearly aren't right for sure..
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700307 * ... so lets discard those as invalid.
308 */
Thomas Renningerfa809452010-02-20 11:44:27 +0100309 if (ACPI_FAILURE(status)) {
Len Brownc52a7412007-08-14 15:49:32 -0400310 tz->trips.critical.flags.valid = 0;
Thomas Renningerfa809452010-02-20 11:44:27 +0100311 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
312 "No critical threshold\n"));
313 } else if (tmp <= 2732) {
314 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
315 "(%llu)\n", tmp);
316 tz->trips.critical.flags.valid = 0;
Zhang Ruice44e192008-01-17 15:51:25 +0800317 } else {
318 tz->trips.critical.flags.valid = 1;
319 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Thomas Renningerfa809452010-02-20 11:44:27 +0100320 "Found critical threshold [%lu]\n",
321 tz->trips.critical.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800322 }
323 if (tz->trips.critical.flags.valid == 1) {
324 if (crt == -1) {
325 tz->trips.critical.flags.valid = 0;
326 } else if (crt > 0) {
327 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
328 /*
Zhang Rui22a94d72008-10-17 02:41:20 -0400329 * Allow override critical threshold
Zhang Ruice44e192008-01-17 15:51:25 +0800330 */
Zhang Rui22a94d72008-10-17 02:41:20 -0400331 if (crt_k > tz->trips.critical.temperature)
332 printk(KERN_WARNING PREFIX
333 "Critical threshold %d C\n", crt);
334 tz->trips.critical.temperature = crt_k;
Zhang Ruice44e192008-01-17 15:51:25 +0800335 }
Len Brownc52a7412007-08-14 15:49:32 -0400336 }
337 }
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 /* Critical Sleep (optional) */
Zhang Ruice44e192008-01-17 15:51:25 +0800340 if (flag & ACPI_TRIPS_HOT) {
Len Browna70cdc52007-08-12 00:12:35 -0400341 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400342 "_HOT", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800343 if (ACPI_FAILURE(status)) {
344 tz->trips.hot.flags.valid = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400345 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Ruice44e192008-01-17 15:51:25 +0800346 "No hot threshold\n"));
347 } else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400348 tz->trips.hot.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800349 tz->trips.hot.flags.valid = 1;
350 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
351 "Found hot threshold [%lu]\n",
352 tz->trips.critical.temperature));
353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 }
355
Zhang Ruice44e192008-01-17 15:51:25 +0800356 /* Passive (optional) */
Zhang Rui0e4240d2009-01-16 12:53:42 -0500357 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
358 (flag == ACPI_TRIPS_INIT)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800359 valid = tz->trips.passive.flags.valid;
360 if (psv == -1) {
361 status = AE_SUPPORT;
362 } else if (psv > 0) {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400363 tmp = CELSIUS_TO_KELVIN(psv);
Zhang Ruice44e192008-01-17 15:51:25 +0800364 status = AE_OK;
365 } else {
366 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400367 "_PSV", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800368 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Zhang Ruice44e192008-01-17 15:51:25 +0800370 if (ACPI_FAILURE(status))
371 tz->trips.passive.flags.valid = 0;
372 else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400373 tz->trips.passive.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800374 tz->trips.passive.flags.valid = 1;
375 if (flag == ACPI_TRIPS_INIT) {
376 status = acpi_evaluate_integer(
377 tz->device->handle, "_TC1",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400378 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800379 if (ACPI_FAILURE(status))
380 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400381 else
382 tz->trips.passive.tc1 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800383 status = acpi_evaluate_integer(
384 tz->device->handle, "_TC2",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400385 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800386 if (ACPI_FAILURE(status))
387 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400388 else
389 tz->trips.passive.tc2 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800390 status = acpi_evaluate_integer(
391 tz->device->handle, "_TSP",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400392 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800393 if (ACPI_FAILURE(status))
394 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400395 else
396 tz->trips.passive.tsp = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800397 }
398 }
399 }
400 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
401 memset(&devices, 0, sizeof(struct acpi_handle_list));
402 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
403 NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500404 if (ACPI_FAILURE(status)) {
405 printk(KERN_WARNING PREFIX
406 "Invalid passive threshold\n");
Zhang Ruice44e192008-01-17 15:51:25 +0800407 tz->trips.passive.flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500408 }
Zhang Ruice44e192008-01-17 15:51:25 +0800409 else
410 tz->trips.passive.flags.valid = 1;
411
412 if (memcmp(&tz->trips.passive.devices, &devices,
413 sizeof(struct acpi_handle_list))) {
414 memcpy(&tz->trips.passive.devices, &devices,
415 sizeof(struct acpi_handle_list));
416 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
417 }
418 }
419 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
420 if (valid != tz->trips.passive.flags.valid)
421 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
422 }
423
424 /* Active (optional) */
Len Brown4be44fc2005-08-05 00:44:28 -0400425 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400426 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
Zhang Ruice44e192008-01-17 15:51:25 +0800427 valid = tz->trips.active[i].flags.valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Len Brownf8707ec2007-08-12 00:12:54 -0400429 if (act == -1)
Zhang Ruice44e192008-01-17 15:51:25 +0800430 break; /* disable all active trip points */
Len Brownf8707ec2007-08-12 00:12:54 -0400431
Zhang Rui0e4240d2009-01-16 12:53:42 -0500432 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
433 tz->trips.active[i].flags.valid)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800434 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400435 name, NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800436 if (ACPI_FAILURE(status)) {
437 tz->trips.active[i].flags.valid = 0;
438 if (i == 0)
439 break;
440 if (act <= 0)
441 break;
442 if (i == 1)
443 tz->trips.active[0].temperature =
444 CELSIUS_TO_KELVIN(act);
445 else
446 /*
447 * Don't allow override higher than
448 * the next higher trip point
449 */
450 tz->trips.active[i - 1].temperature =
451 (tz->trips.active[i - 2].temperature <
452 CELSIUS_TO_KELVIN(act) ?
453 tz->trips.active[i - 2].temperature :
454 CELSIUS_TO_KELVIN(act));
Len Brownf8707ec2007-08-12 00:12:54 -0400455 break;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400456 } else {
457 tz->trips.active[i].temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800458 tz->trips.active[i].flags.valid = 1;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400459 }
Len Brownf8707ec2007-08-12 00:12:54 -0400460 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
462 name[2] = 'L';
Zhang Ruice44e192008-01-17 15:51:25 +0800463 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
464 memset(&devices, 0, sizeof(struct acpi_handle_list));
465 status = acpi_evaluate_reference(tz->device->handle,
466 name, NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500467 if (ACPI_FAILURE(status)) {
468 printk(KERN_WARNING PREFIX
469 "Invalid active%d threshold\n", i);
Zhang Ruice44e192008-01-17 15:51:25 +0800470 tz->trips.active[i].flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500471 }
Zhang Ruice44e192008-01-17 15:51:25 +0800472 else
473 tz->trips.active[i].flags.valid = 1;
474
475 if (memcmp(&tz->trips.active[i].devices, &devices,
476 sizeof(struct acpi_handle_list))) {
477 memcpy(&tz->trips.active[i].devices, &devices,
478 sizeof(struct acpi_handle_list));
479 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
480 }
481 }
482 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
483 if (valid != tz->trips.active[i].flags.valid)
484 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
485
486 if (!tz->trips.active[i].flags.valid)
487 break;
488 }
489
490 if (flag & ACPI_TRIPS_DEVICES) {
491 memset(&devices, 0, sizeof(struct acpi_handle_list));
492 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
493 NULL, &devices);
494 if (memcmp(&tz->devices, &devices,
495 sizeof(struct acpi_handle_list))) {
496 memcpy(&tz->devices, &devices,
497 sizeof(struct acpi_handle_list));
498 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
499 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
501
Patrick Mocheld550d982006-06-27 00:41:40 -0400502 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503}
504
Zhang Ruice44e192008-01-17 15:51:25 +0800505static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100507 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
508
509 if (ret)
510 return ret;
511
512 valid = tz->trips.critical.flags.valid |
513 tz->trips.hot.flags.valid |
514 tz->trips.passive.flags.valid;
515
516 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
517 valid |= tz->trips.active[i].flags.valid;
518
519 if (!valid) {
520 printk(KERN_WARNING FW_BUG "No valid trip found\n");
521 return -ENODEV;
522 }
523 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524}
525
Len Brown4be44fc2005-08-05 00:44:28 -0400526static void acpi_thermal_check(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200528 struct acpi_thermal *tz = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Matthew Garrettb1569e92008-12-03 17:55:32 +0000530 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531}
532
Zhang Rui3f655ef2008-01-17 15:51:11 +0800533/* sys I/F for generic thermal sysfs support */
Jean Delvare13614e32009-04-06 16:01:46 +0200534#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
Zhang, Rui5e012762008-02-28 07:51:30 +0800535
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000536static int thermal_get_temp(struct thermal_zone_device *thermal,
537 unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800538{
539 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800540 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800541
542 if (!tz)
543 return -EINVAL;
544
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800545 result = acpi_thermal_get_temperature(tz);
546 if (result)
547 return result;
548
Jean Delvare13614e32009-04-06 16:01:46 +0200549 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000550 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800551}
552
553static const char enabled[] = "kernel";
554static const char disabled[] = "user";
555static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000556 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800557{
558 struct acpi_thermal *tz = thermal->devdata;
559
560 if (!tz)
561 return -EINVAL;
562
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000563 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
564 THERMAL_DEVICE_DISABLED;
565
566 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800567}
568
569static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000570 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800571{
572 struct acpi_thermal *tz = thermal->devdata;
573 int enable;
574
575 if (!tz)
576 return -EINVAL;
577
578 /*
579 * enable/disable thermal management from ACPI thermal driver
580 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000581 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800582 enable = 1;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000583 else if (mode == THERMAL_DEVICE_DISABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800584 enable = 0;
585 else
586 return -EINVAL;
587
588 if (enable != tz->tz_enabled) {
589 tz->tz_enabled = enable;
590 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
591 "%s ACPI thermal control\n",
592 tz->tz_enabled ? enabled : disabled));
593 acpi_thermal_check(tz);
594 }
595 return 0;
596}
597
598static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000599 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800600{
601 struct acpi_thermal *tz = thermal->devdata;
602 int i;
603
604 if (!tz || trip < 0)
605 return -EINVAL;
606
607 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000608 if (!trip) {
609 *type = THERMAL_TRIP_CRITICAL;
610 return 0;
611 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800612 trip--;
613 }
614
615 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000616 if (!trip) {
617 *type = THERMAL_TRIP_HOT;
618 return 0;
619 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800620 trip--;
621 }
622
623 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000624 if (!trip) {
625 *type = THERMAL_TRIP_PASSIVE;
626 return 0;
627 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800628 trip--;
629 }
630
631 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
632 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000633 if (!trip) {
634 *type = THERMAL_TRIP_ACTIVE;
635 return 0;
636 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800637 trip--;
638 }
639
640 return -EINVAL;
641}
642
643static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000644 int trip, unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800645{
646 struct acpi_thermal *tz = thermal->devdata;
647 int i;
648
649 if (!tz || trip < 0)
650 return -EINVAL;
651
652 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000653 if (!trip) {
654 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200655 tz->trips.critical.temperature,
656 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000657 return 0;
658 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800659 trip--;
660 }
661
662 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000663 if (!trip) {
664 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200665 tz->trips.hot.temperature,
666 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000667 return 0;
668 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800669 trip--;
670 }
671
672 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000673 if (!trip) {
674 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200675 tz->trips.passive.temperature,
676 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000677 return 0;
678 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800679 trip--;
680 }
681
682 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
683 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000684 if (!trip) {
685 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200686 tz->trips.active[i].temperature,
687 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000688 return 0;
689 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800690 trip--;
691 }
692
693 return -EINVAL;
694}
695
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800696static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
697 unsigned long *temperature) {
698 struct acpi_thermal *tz = thermal->devdata;
699
700 if (tz->trips.critical.flags.valid) {
701 *temperature = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200702 tz->trips.critical.temperature,
703 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800704 return 0;
705 } else
706 return -EINVAL;
707}
708
Matthew Garrettb1569e92008-12-03 17:55:32 +0000709static int thermal_notify(struct thermal_zone_device *thermal, int trip,
710 enum thermal_trip_type trip_type)
711{
712 u8 type = 0;
713 struct acpi_thermal *tz = thermal->devdata;
714
715 if (trip_type == THERMAL_TRIP_CRITICAL)
716 type = ACPI_THERMAL_NOTIFY_CRITICAL;
717 else if (trip_type == THERMAL_TRIP_HOT)
718 type = ACPI_THERMAL_NOTIFY_HOT;
719 else
720 return 0;
721
722 acpi_bus_generate_proc_event(tz->device, type, 1);
723 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100724 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000725
726 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
727 return 1;
728
729 return 0;
730}
731
Zhang Rui3f655ef2008-01-17 15:51:11 +0800732typedef int (*cb)(struct thermal_zone_device *, int,
733 struct thermal_cooling_device *);
734static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
735 struct thermal_cooling_device *cdev,
736 cb action)
737{
738 struct acpi_device *device = cdev->devdata;
739 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800740 struct acpi_device *dev;
741 acpi_status status;
742 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800743 int i;
744 int j;
745 int trip = -1;
746 int result = 0;
747
748 if (tz->trips.critical.flags.valid)
749 trip++;
750
751 if (tz->trips.hot.flags.valid)
752 trip++;
753
754 if (tz->trips.passive.flags.valid) {
755 trip++;
756 for (i = 0; i < tz->trips.passive.devices.count;
757 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800758 handle = tz->trips.passive.devices.handles[i];
759 status = acpi_bus_get_device(handle, &dev);
760 if (ACPI_SUCCESS(status) && (dev == device)) {
761 result = action(thermal, trip, cdev);
762 if (result)
763 goto failed;
764 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800765 }
766 }
767
768 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
769 if (!tz->trips.active[i].flags.valid)
770 break;
771 trip++;
772 for (j = 0;
773 j < tz->trips.active[i].devices.count;
774 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800775 handle = tz->trips.active[i].devices.handles[j];
776 status = acpi_bus_get_device(handle, &dev);
777 if (ACPI_SUCCESS(status) && (dev == device)) {
778 result = action(thermal, trip, cdev);
779 if (result)
780 goto failed;
781 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800782 }
783 }
784
785 for (i = 0; i < tz->devices.count; i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800786 handle = tz->devices.handles[i];
787 status = acpi_bus_get_device(handle, &dev);
788 if (ACPI_SUCCESS(status) && (dev == device)) {
789 result = action(thermal, -1, cdev);
790 if (result)
791 goto failed;
792 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800793 }
794
795failed:
796 return result;
797}
798
799static int
800acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
801 struct thermal_cooling_device *cdev)
802{
803 return acpi_thermal_cooling_device_cb(thermal, cdev,
804 thermal_zone_bind_cooling_device);
805}
806
807static int
808acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
809 struct thermal_cooling_device *cdev)
810{
811 return acpi_thermal_cooling_device_cb(thermal, cdev,
812 thermal_zone_unbind_cooling_device);
813}
814
815static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
816 .bind = acpi_thermal_bind_cooling_device,
817 .unbind = acpi_thermal_unbind_cooling_device,
818 .get_temp = thermal_get_temp,
819 .get_mode = thermal_get_mode,
820 .set_mode = thermal_set_mode,
821 .get_trip_type = thermal_get_trip_type,
822 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800823 .get_crit_temp = thermal_get_crit_temp,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000824 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800825};
826
827static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
828{
829 int trips = 0;
830 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800831 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800832 int i;
833
834 if (tz->trips.critical.flags.valid)
835 trips++;
836
837 if (tz->trips.hot.flags.valid)
838 trips++;
839
840 if (tz->trips.passive.flags.valid)
841 trips++;
842
843 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
844 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000845
846 if (tz->trips.passive.flags.valid)
847 tz->thermal_zone =
848 thermal_zone_device_register("acpitz", trips, tz,
849 &acpi_thermal_zone_ops,
850 tz->trips.passive.tc1,
851 tz->trips.passive.tc2,
852 tz->trips.passive.tsp*100,
853 tz->polling_frequency*100);
854 else
855 tz->thermal_zone =
856 thermal_zone_device_register("acpitz", trips, tz,
857 &acpi_thermal_zone_ops,
858 0, 0, 0,
Matthew Garrett67405432009-04-14 20:16:45 +0100859 tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700860 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800861 return -ENODEV;
862
863 result = sysfs_create_link(&tz->device->dev.kobj,
864 &tz->thermal_zone->device.kobj, "thermal_zone");
865 if (result)
866 return result;
867
868 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
869 &tz->device->dev.kobj, "device");
870 if (result)
871 return result;
872
Zhang Rui20733932008-01-17 15:51:21 +0800873 status = acpi_attach_data(tz->device->handle,
874 acpi_bus_private_data_handler,
875 tz->thermal_zone);
876 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800877 printk(KERN_ERR PREFIX
878 "Error attaching device data\n");
Zhang Rui20733932008-01-17 15:51:21 +0800879 return -ENODEV;
880 }
881
Zhang Rui3f655ef2008-01-17 15:51:11 +0800882 tz->tz_enabled = 1;
883
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200884 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
885 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800886 return 0;
887}
888
889static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
890{
891 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
892 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
893 thermal_zone_device_unregister(tz->thermal_zone);
894 tz->thermal_zone = NULL;
Zhang Rui20733932008-01-17 15:51:21 +0800895 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800896}
897
898
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 Driver Interface
901 -------------------------------------------------------------------------- */
902
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000903static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904{
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000905 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
908 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400909 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 switch (event) {
912 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
913 acpi_thermal_check(tz);
914 break;
915 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +0800916 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400918 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800919 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100920 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 break;
922 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +0800923 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
924 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400925 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800926 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100927 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 break;
929 default:
930 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400931 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 break;
933 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934}
935
Len Brown4be44fc2005-08-05 00:44:28 -0400936static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
Len Brown4be44fc2005-08-05 00:44:28 -0400938 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
941 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400942 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
944 /* Get temperature [_TMP] (required) */
945 result = acpi_thermal_get_temperature(tz);
946 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -0400947 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
949 /* Get trip points [_CRT, _PSV, etc.] (required) */
950 result = acpi_thermal_get_trip_points(tz);
951 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -0400952 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954 /* Set the cooling mode [_SCP] to active cooling (default) */
955 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -0400956 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
959 /* Get default polling frequency [_TZP] (optional) */
960 if (tzp)
961 tz->polling_frequency = tzp;
962 else
963 acpi_thermal_get_polling_frequency(tz);
964
Patrick Mocheld550d982006-06-27 00:41:40 -0400965 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966}
967
Jean Delvare13614e32009-04-06 16:01:46 +0200968/*
969 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
970 * handles temperature values with a single decimal place. As a consequence,
971 * some implementations use an offset of 273.1 and others use an offset of
972 * 273.2. Try to find out which one is being used, to present the most
973 * accurate and visually appealing number.
974 *
975 * The heuristic below should work for all ACPI thermal zones which have a
976 * critical trip point with a value being a multiple of 0.5 degree Celsius.
977 */
978static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
979{
980 if (tz->trips.critical.flags.valid &&
981 (tz->trips.critical.temperature % 5) == 1)
982 tz->kelvin_offset = 2731;
983 else
984 tz->kelvin_offset = 2732;
985}
986
Len Brown4be44fc2005-08-05 00:44:28 -0400987static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988{
Len Brown4be44fc2005-08-05 00:44:28 -0400989 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400990 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
993 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400994 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Burman Yan36bcbec2006-12-19 12:56:11 -0800996 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400998 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001000 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 strcpy(tz->name, device->pnp.bus_id);
1002 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1003 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001004 device->driver_data = tz;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001005 mutex_init(&tz->lock);
Zhang Rui3f655ef2008-01-17 15:51:11 +08001006
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 result = acpi_thermal_get_info(tz);
1009 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001010 goto free_memory;
1011
Jean Delvare13614e32009-04-06 16:01:46 +02001012 acpi_thermal_guess_offset(tz);
1013
Zhang Rui3f655ef2008-01-17 15:51:11 +08001014 result = acpi_thermal_register_thermal_zone(tz);
1015 if (result)
1016 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001019 acpi_device_name(device), acpi_device_bid(device),
1020 KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001021 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
Zhang Rui3f655ef2008-01-17 15:51:11 +08001023free_memory:
1024 kfree(tz);
1025end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001026 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027}
1028
Len Brown4be44fc2005-08-05 00:44:28 -04001029static int acpi_thermal_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030{
Len Brown4be44fc2005-08-05 00:44:28 -04001031 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001034 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001036 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
Zhang Rui3f655ef2008-01-17 15:51:11 +08001038 acpi_thermal_unregister_thermal_zone(tz);
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001039 mutex_destroy(&tz->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001041 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042}
1043
Patrick Mochel5d9464a2006-12-07 20:56:27 +08001044static int acpi_thermal_resume(struct acpi_device *device)
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001045{
1046 struct acpi_thermal *tz = NULL;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001047 int i, j, power_state, result;
1048
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001049
1050 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001051 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001052
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001053 tz = acpi_driver_data(device);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001054
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001055 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001056 if (!(&tz->trips.active[i]))
1057 break;
1058 if (!tz->trips.active[i].flags.valid)
1059 break;
1060 tz->trips.active[i].flags.enabled = 1;
1061 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1062 result = acpi_bus_get_power(tz->trips.active[i].devices.
1063 handles[j], &power_state);
1064 if (result || (power_state != ACPI_STATE_D0)) {
1065 tz->trips.active[i].flags.enabled = 0;
1066 break;
1067 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001068 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001069 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001070 }
1071
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001072 acpi_thermal_check(tz);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001073
1074 return AE_OK;
1075}
1076
Jeff Garzik18552562007-10-03 15:15:40 -04001077static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001078
1079 if (act == 0) {
1080 printk(KERN_NOTICE "ACPI: %s detected: "
1081 "disabling all active thermal trip points\n", d->ident);
1082 act = -1;
1083 }
1084 return 0;
1085}
Jeff Garzik18552562007-10-03 15:15:40 -04001086static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001087
1088 printk(KERN_NOTICE "ACPI: %s detected: "
1089 "disabling all critical thermal trip point actions.\n", d->ident);
1090 nocrt = 1;
1091 return 0;
1092}
Jeff Garzik18552562007-10-03 15:15:40 -04001093static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001094
1095 if (tzp == 0) {
1096 printk(KERN_NOTICE "ACPI: %s detected: "
1097 "enabling thermal zone polling\n", d->ident);
1098 tzp = 300; /* 300 dS = 30 Seconds */
1099 }
1100 return 0;
1101}
Jeff Garzik18552562007-10-03 15:15:40 -04001102static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001103
1104 if (psv == 0) {
1105 printk(KERN_NOTICE "ACPI: %s detected: "
1106 "disabling all passive thermal trip points\n", d->ident);
1107 psv = -1;
1108 }
1109 return 0;
1110}
1111
1112static struct dmi_system_id thermal_dmi_table[] __initdata = {
1113 /*
1114 * Award BIOS on this AOpen makes thermal control almost worthless.
1115 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1116 */
1117 {
1118 .callback = thermal_act,
1119 .ident = "AOpen i915GMm-HFS",
1120 .matches = {
1121 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1122 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1123 },
1124 },
1125 {
1126 .callback = thermal_psv,
1127 .ident = "AOpen i915GMm-HFS",
1128 .matches = {
1129 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1130 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1131 },
1132 },
1133 {
1134 .callback = thermal_tzp,
1135 .ident = "AOpen i915GMm-HFS",
1136 .matches = {
1137 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1138 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1139 },
1140 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001141 {
1142 .callback = thermal_nocrt,
1143 .ident = "Gigabyte GA-7ZX",
1144 .matches = {
1145 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1146 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1147 },
1148 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001149 {}
1150};
Len Brown0b5bfa12007-08-12 00:13:02 -04001151
Len Brown4be44fc2005-08-05 00:44:28 -04001152static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153{
Len Brown4be44fc2005-08-05 00:44:28 -04001154 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
Len Brown0b5bfa12007-08-12 00:13:02 -04001156 dmi_check_system(thermal_dmi_table);
1157
Len Brown72b33ef2007-08-12 00:12:17 -04001158 if (off) {
1159 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1160 return -ENODEV;
1161 }
Zhang Rui43d9f872010-07-15 10:46:44 +08001162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 result = acpi_bus_register_driver(&acpi_thermal_driver);
Zhang Ruic57b62f2010-10-08 13:55:06 +08001164 if (result < 0)
Patrick Mocheld550d982006-06-27 00:41:40 -04001165 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
Patrick Mocheld550d982006-06-27 00:41:40 -04001167 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168}
1169
Len Brown4be44fc2005-08-05 00:44:28 -04001170static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 acpi_bus_unregister_driver(&acpi_thermal_driver);
1174
Patrick Mocheld550d982006-06-27 00:41:40 -04001175 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176}
1177
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178module_init(acpi_thermal_init);
1179module_exit(acpi_thermal_exit);