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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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 *
21 * This driver fully implements the ACPI thermal policy as described in the
22 * ACPI 2.0 Specification.
23 *
24 * TBD: 1. Implement passive cooling hysteresis.
25 * 2. Enhance passive cooling (CPU) states/limit interface to support
26 * concepts of 'multiple limiters', upper/lower limits, etc.
27 *
28 */
29
30#include <linux/kernel.h>
31#include <linux/module.h>
Len Brown0b5bfa12007-08-12 00:13:02 -040032#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090034#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/types.h>
Tim Schmielaucd354f12007-02-14 00:33:14 -080036#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/kmod.h>
Jeremy Fitzhardinge10a0a8d2007-07-17 18:37:02 -070038#include <linux/reboot.h>
Stephen Rothwellf6f5c452009-03-03 12:47:17 +110039#include <linux/device.h>
Zhang Rui3f655ef2008-01-17 15:51:11 +080040#include <linux/thermal.h>
Lv Zheng8b484632013-12-03 08:49:16 +080041#include <linux/acpi.h>
Aaron Lua59ffb22014-03-04 14:24:46 +080042#include <linux/workqueue.h>
Lv Zheng8b484632013-12-03 08:49:16 +080043#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Len Browna192a952009-07-28 16:45:54 -040045#define PREFIX "ACPI: "
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define ACPI_THERMAL_CLASS "thermal_zone"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
50#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
51#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
52#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
53#define ACPI_THERMAL_NOTIFY_HOT 0xF1
54#define ACPI_THERMAL_MODE_ACTIVE 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define ACPI_THERMAL_MAX_ACTIVE 10
57#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#define _COMPONENT ACPI_THERMAL_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050060ACPI_MODULE_NAME("thermal");
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Thomas Renninger1cbf4c52004-09-16 11:07:00 -040062MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050063MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070064MODULE_LICENSE("GPL");
65
Len Brownf8707ec2007-08-12 00:12:54 -040066static int act;
67module_param(act, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040068MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
Len Brownf8707ec2007-08-12 00:12:54 -040069
Len Brownc52a7412007-08-14 15:49:32 -040070static int crt;
71module_param(crt, int, 0644);
72MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074static int tzp;
Len Brown730ff342007-08-12 00:12:26 -040075module_param(tzp, int, 0444);
Len Brown3c1d36d2007-08-14 15:12:56 -040076MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Len Brownf5487142007-08-12 00:12:44 -040078static int nocrt;
79module_param(nocrt, int, 0);
Len Brown8c99fdc2007-08-20 18:46:50 -040080MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
Len Brownf5487142007-08-12 00:12:44 -040081
Len Brown72b33ef2007-08-12 00:12:17 -040082static int off;
83module_param(off, int, 0);
Len Brown3c1d36d2007-08-14 15:12:56 -040084MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
Len Brown72b33ef2007-08-12 00:12:17 -040085
Len Browna70cdc52007-08-12 00:12:35 -040086static int psv;
87module_param(psv, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040088MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
Len Browna70cdc52007-08-12 00:12:35 -040089
Aaron Lua59ffb22014-03-04 14:24:46 +080090static struct workqueue_struct *acpi_thermal_pm_queue;
91
Len Brown4be44fc2005-08-05 00:44:28 -040092static int acpi_thermal_add(struct acpi_device *device);
Rafael J. Wysocki51fac832013-01-24 00:24:48 +010093static int acpi_thermal_remove(struct acpi_device *device);
Bjorn Helgaas342d5502009-04-07 15:37:06 +000094static void acpi_thermal_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Thomas Renninger1ba90e32007-07-23 14:44:41 +020096static const struct acpi_device_id thermal_device_ids[] = {
97 {ACPI_THERMAL_HID, 0},
98 {"", 0},
99};
100MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
101
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200102#ifdef CONFIG_PM_SLEEP
Aaron Lua59ffb22014-03-04 14:24:46 +0800103static int acpi_thermal_suspend(struct device *dev);
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200104static int acpi_thermal_resume(struct device *dev);
Shuah Khanfae9e2a2014-02-12 20:19:10 -0700105#else
Aaron Lua59ffb22014-03-04 14:24:46 +0800106#define acpi_thermal_suspend NULL
Shuah Khanfae9e2a2014-02-12 20:19:10 -0700107#define acpi_thermal_resume NULL
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200108#endif
Aaron Lua59ffb22014-03-04 14:24:46 +0800109static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume);
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111static struct acpi_driver acpi_thermal_driver = {
Len Brownc2b67052007-02-12 23:33:40 -0500112 .name = "thermal",
Len Brown4be44fc2005-08-05 00:44:28 -0400113 .class = ACPI_THERMAL_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200114 .ids = thermal_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -0400115 .ops = {
116 .add = acpi_thermal_add,
117 .remove = acpi_thermal_remove,
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000118 .notify = acpi_thermal_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400119 },
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200120 .drv.pm = &acpi_thermal_pm,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121};
122
123struct acpi_thermal_state {
Len Brown4be44fc2005-08-05 00:44:28 -0400124 u8 critical:1;
125 u8 hot:1;
126 u8 passive:1;
127 u8 active:1;
128 u8 reserved:4;
129 int active_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130};
131
132struct acpi_thermal_state_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400133 u8 valid:1;
134 u8 enabled:1;
135 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136};
137
138struct acpi_thermal_critical {
139 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400140 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141};
142
143struct acpi_thermal_hot {
144 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400145 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146};
147
148struct acpi_thermal_passive {
149 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400150 unsigned long temperature;
151 unsigned long tc1;
152 unsigned long tc2;
153 unsigned long tsp;
154 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155};
156
157struct acpi_thermal_active {
158 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400159 unsigned long temperature;
160 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161};
162
163struct acpi_thermal_trips {
164 struct acpi_thermal_critical critical;
Len Brown4be44fc2005-08-05 00:44:28 -0400165 struct acpi_thermal_hot hot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 struct acpi_thermal_passive passive;
167 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
168};
169
170struct acpi_thermal_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400171 u8 cooling_mode:1; /* _SCP */
172 u8 devices:1; /* _TZD */
173 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174};
175
176struct acpi_thermal {
Patrick Mochel8348e1b2006-05-19 16:54:40 -0400177 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -0400178 acpi_bus_id name;
179 unsigned long temperature;
180 unsigned long last_temperature;
181 unsigned long polling_frequency;
Len Brown4be44fc2005-08-05 00:44:28 -0400182 volatile u8 zombie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 struct acpi_thermal_flags flags;
184 struct acpi_thermal_state state;
185 struct acpi_thermal_trips trips;
Len Brown4be44fc2005-08-05 00:44:28 -0400186 struct acpi_handle_list devices;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800187 struct thermal_zone_device *thermal_zone;
188 int tz_enabled;
Jean Delvare13614e32009-04-06 16:01:46 +0200189 int kelvin_offset;
Aaron Lua59ffb22014-03-04 14:24:46 +0800190 struct work_struct thermal_check_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191};
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193/* --------------------------------------------------------------------------
194 Thermal Zone Management
195 -------------------------------------------------------------------------- */
196
Len Brown4be44fc2005-08-05 00:44:28 -0400197static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
Len Brown4be44fc2005-08-05 00:44:28 -0400199 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400200 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400203 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 tz->last_temperature = tz->temperature;
206
Matthew Wilcox27663c52008-10-10 02:22:59 -0400207 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400209 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Matthew Wilcox27663c52008-10-10 02:22:59 -0400211 tz->temperature = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400212 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
213 tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Patrick Mocheld550d982006-06-27 00:41:40 -0400215 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Len Brown4be44fc2005-08-05 00:44:28 -0400218static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Len Brown4be44fc2005-08-05 00:44:28 -0400220 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400221 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400224 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Matthew Wilcox27663c52008-10-10 02:22:59 -0400226 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400228 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Matthew Wilcox27663c52008-10-10 02:22:59 -0400230 tz->polling_frequency = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400231 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
232 tz->polling_frequency));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Patrick Mocheld550d982006-06-27 00:41:40 -0400234 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Len Brown4be44fc2005-08-05 00:44:28 -0400237static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400240 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Jiang Liu0db98202013-06-29 00:24:39 +0800242 if (!acpi_has_method(tz->device->handle, "_SCP")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400244 return -ENODEV;
Jiang Liu0db98202013-06-29 00:24:39 +0800245 } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle,
246 "_SCP", mode))) {
Patrick Mocheld550d982006-06-27 00:41:40 -0400247 return -ENODEV;
Jiang Liu0db98202013-06-29 00:24:39 +0800248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Patrick Mocheld550d982006-06-27 00:41:40 -0400250 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
252
Zhang Ruice44e192008-01-17 15:51:25 +0800253#define ACPI_TRIPS_CRITICAL 0x01
254#define ACPI_TRIPS_HOT 0x02
255#define ACPI_TRIPS_PASSIVE 0x04
256#define ACPI_TRIPS_ACTIVE 0x08
257#define ACPI_TRIPS_DEVICES 0x10
258
259#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
260#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
261
262#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
263 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
264 ACPI_TRIPS_DEVICES)
265
266/*
267 * This exception is thrown out in two cases:
268 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
269 * when re-evaluating the AML code.
270 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
271 * We need to re-bind the cooling devices of a thermal zone when this occurs.
272 */
273#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
274do { \
275 if (flags != ACPI_TRIPS_INIT) \
276 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
277 "ACPI thermal trip point %s changed\n" \
Colin Ian King7e3cf242012-11-29 11:53:16 +0000278 "Please send acpidump to linux-acpi@vger.kernel.org", str)); \
Zhang Ruice44e192008-01-17 15:51:25 +0800279} while (0)
280
281static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Len Brown4be44fc2005-08-05 00:44:28 -0400283 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400284 unsigned long long tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800285 struct acpi_handle_list devices;
286 int valid = 0;
287 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Thomas Renningerfa809452010-02-20 11:44:27 +0100289 /* Critical Shutdown */
Zhang Ruice44e192008-01-17 15:51:25 +0800290 if (flag & ACPI_TRIPS_CRITICAL) {
291 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400292 "_CRT", NULL, &tmp);
293 tz->trips.critical.temperature = tmp;
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700294 /*
295 * Treat freezing temperatures as invalid as well; some
296 * BIOSes return really low values and cause reboots at startup.
Adam Buchbinderb731d7b2009-03-13 12:15:26 -0400297 * Below zero (Celsius) values clearly aren't right for sure..
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700298 * ... so lets discard those as invalid.
299 */
Thomas Renningerfa809452010-02-20 11:44:27 +0100300 if (ACPI_FAILURE(status)) {
Len Brownc52a7412007-08-14 15:49:32 -0400301 tz->trips.critical.flags.valid = 0;
Thomas Renningerfa809452010-02-20 11:44:27 +0100302 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
303 "No critical threshold\n"));
304 } else if (tmp <= 2732) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300305 pr_warn(FW_BUG "Invalid critical threshold (%llu)\n",
306 tmp);
Thomas Renningerfa809452010-02-20 11:44:27 +0100307 tz->trips.critical.flags.valid = 0;
Zhang Ruice44e192008-01-17 15:51:25 +0800308 } else {
309 tz->trips.critical.flags.valid = 1;
310 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Thomas Renningerfa809452010-02-20 11:44:27 +0100311 "Found critical threshold [%lu]\n",
312 tz->trips.critical.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800313 }
314 if (tz->trips.critical.flags.valid == 1) {
315 if (crt == -1) {
316 tz->trips.critical.flags.valid = 0;
317 } else if (crt > 0) {
318 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
319 /*
Zhang Rui22a94d72008-10-17 02:41:20 -0400320 * Allow override critical threshold
Zhang Ruice44e192008-01-17 15:51:25 +0800321 */
Zhang Rui22a94d72008-10-17 02:41:20 -0400322 if (crt_k > tz->trips.critical.temperature)
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300323 pr_warn(PREFIX "Critical threshold %d C\n",
324 crt);
Zhang Rui22a94d72008-10-17 02:41:20 -0400325 tz->trips.critical.temperature = crt_k;
Zhang Ruice44e192008-01-17 15:51:25 +0800326 }
Len Brownc52a7412007-08-14 15:49:32 -0400327 }
328 }
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 /* Critical Sleep (optional) */
Zhang Ruice44e192008-01-17 15:51:25 +0800331 if (flag & ACPI_TRIPS_HOT) {
Len Browna70cdc52007-08-12 00:12:35 -0400332 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400333 "_HOT", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800334 if (ACPI_FAILURE(status)) {
335 tz->trips.hot.flags.valid = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400336 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Ruice44e192008-01-17 15:51:25 +0800337 "No hot threshold\n"));
338 } else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400339 tz->trips.hot.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800340 tz->trips.hot.flags.valid = 1;
341 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
342 "Found hot threshold [%lu]\n",
Zhihui Zhangee17fdf2014-03-29 09:25:47 -0400343 tz->trips.hot.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 }
346
Zhang Ruice44e192008-01-17 15:51:25 +0800347 /* Passive (optional) */
Zhang Rui0e4240d2009-01-16 12:53:42 -0500348 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
349 (flag == ACPI_TRIPS_INIT)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800350 valid = tz->trips.passive.flags.valid;
351 if (psv == -1) {
352 status = AE_SUPPORT;
353 } else if (psv > 0) {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400354 tmp = CELSIUS_TO_KELVIN(psv);
Zhang Ruice44e192008-01-17 15:51:25 +0800355 status = AE_OK;
356 } else {
357 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400358 "_PSV", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Zhang Ruice44e192008-01-17 15:51:25 +0800361 if (ACPI_FAILURE(status))
362 tz->trips.passive.flags.valid = 0;
363 else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400364 tz->trips.passive.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800365 tz->trips.passive.flags.valid = 1;
366 if (flag == ACPI_TRIPS_INIT) {
367 status = acpi_evaluate_integer(
368 tz->device->handle, "_TC1",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400369 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800370 if (ACPI_FAILURE(status))
371 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400372 else
373 tz->trips.passive.tc1 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800374 status = acpi_evaluate_integer(
375 tz->device->handle, "_TC2",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400376 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800377 if (ACPI_FAILURE(status))
378 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400379 else
380 tz->trips.passive.tc2 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800381 status = acpi_evaluate_integer(
382 tz->device->handle, "_TSP",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400383 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800384 if (ACPI_FAILURE(status))
385 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400386 else
387 tz->trips.passive.tsp = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800388 }
389 }
390 }
391 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
392 memset(&devices, 0, sizeof(struct acpi_handle_list));
393 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
394 NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500395 if (ACPI_FAILURE(status)) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300396 pr_warn(PREFIX "Invalid passive threshold\n");
Zhang Ruice44e192008-01-17 15:51:25 +0800397 tz->trips.passive.flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500398 }
Zhang Ruice44e192008-01-17 15:51:25 +0800399 else
400 tz->trips.passive.flags.valid = 1;
401
402 if (memcmp(&tz->trips.passive.devices, &devices,
403 sizeof(struct acpi_handle_list))) {
404 memcpy(&tz->trips.passive.devices, &devices,
405 sizeof(struct acpi_handle_list));
406 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
407 }
408 }
409 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
410 if (valid != tz->trips.passive.flags.valid)
411 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
412 }
413
414 /* Active (optional) */
Len Brown4be44fc2005-08-05 00:44:28 -0400415 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400416 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
Zhang Ruice44e192008-01-17 15:51:25 +0800417 valid = tz->trips.active[i].flags.valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Len Brownf8707ec2007-08-12 00:12:54 -0400419 if (act == -1)
Zhang Ruice44e192008-01-17 15:51:25 +0800420 break; /* disable all active trip points */
Len Brownf8707ec2007-08-12 00:12:54 -0400421
Zhang Rui0e4240d2009-01-16 12:53:42 -0500422 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
423 tz->trips.active[i].flags.valid)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800424 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400425 name, NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800426 if (ACPI_FAILURE(status)) {
427 tz->trips.active[i].flags.valid = 0;
428 if (i == 0)
429 break;
430 if (act <= 0)
431 break;
432 if (i == 1)
433 tz->trips.active[0].temperature =
434 CELSIUS_TO_KELVIN(act);
435 else
436 /*
437 * Don't allow override higher than
438 * the next higher trip point
439 */
440 tz->trips.active[i - 1].temperature =
441 (tz->trips.active[i - 2].temperature <
442 CELSIUS_TO_KELVIN(act) ?
443 tz->trips.active[i - 2].temperature :
444 CELSIUS_TO_KELVIN(act));
Len Brownf8707ec2007-08-12 00:12:54 -0400445 break;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400446 } else {
447 tz->trips.active[i].temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800448 tz->trips.active[i].flags.valid = 1;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400449 }
Len Brownf8707ec2007-08-12 00:12:54 -0400450 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 name[2] = 'L';
Zhang Ruice44e192008-01-17 15:51:25 +0800453 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
454 memset(&devices, 0, sizeof(struct acpi_handle_list));
455 status = acpi_evaluate_reference(tz->device->handle,
456 name, NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500457 if (ACPI_FAILURE(status)) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300458 pr_warn(PREFIX "Invalid active%d threshold\n",
459 i);
Zhang Ruice44e192008-01-17 15:51:25 +0800460 tz->trips.active[i].flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500461 }
Zhang Ruice44e192008-01-17 15:51:25 +0800462 else
463 tz->trips.active[i].flags.valid = 1;
464
465 if (memcmp(&tz->trips.active[i].devices, &devices,
466 sizeof(struct acpi_handle_list))) {
467 memcpy(&tz->trips.active[i].devices, &devices,
468 sizeof(struct acpi_handle_list));
469 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
470 }
471 }
472 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
473 if (valid != tz->trips.active[i].flags.valid)
474 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
475
476 if (!tz->trips.active[i].flags.valid)
477 break;
478 }
479
Lan Tianyu668e0202013-08-27 16:29:31 +0800480 if ((flag & ACPI_TRIPS_DEVICES)
481 && acpi_has_method(tz->device->handle, "_TZD")) {
482 memset(&devices, 0, sizeof(devices));
Zhang Ruice44e192008-01-17 15:51:25 +0800483 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
484 NULL, &devices);
Lan Tianyu668e0202013-08-27 16:29:31 +0800485 if (ACPI_SUCCESS(status)
486 && memcmp(&tz->devices, &devices, sizeof(devices))) {
487 tz->devices = devices;
Zhang Ruice44e192008-01-17 15:51:25 +0800488 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
489 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 }
491
Patrick Mocheld550d982006-06-27 00:41:40 -0400492 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493}
494
Zhang Ruice44e192008-01-17 15:51:25 +0800495static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496{
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100497 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
498
499 if (ret)
500 return ret;
501
502 valid = tz->trips.critical.flags.valid |
503 tz->trips.hot.flags.valid |
504 tz->trips.passive.flags.valid;
505
506 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
507 valid |= tz->trips.active[i].flags.valid;
508
509 if (!valid) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300510 pr_warn(FW_BUG "No valid trip found\n");
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100511 return -ENODEV;
512 }
513 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
Len Brown4be44fc2005-08-05 00:44:28 -0400516static void acpi_thermal_check(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200518 struct acpi_thermal *tz = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700520 if (!tz->tz_enabled)
Srinivas Pandruvadaca4e7132013-01-15 23:57:16 +0100521 return;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700522
Matthew Garrettb1569e92008-12-03 17:55:32 +0000523 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524}
525
Zhang Rui3f655ef2008-01-17 15:51:11 +0800526/* sys I/F for generic thermal sysfs support */
Zhang, Rui5e012762008-02-28 07:51:30 +0800527
Sascha Hauer17e83512015-07-24 08:12:54 +0200528static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800529{
530 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800531 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800532
533 if (!tz)
534 return -EINVAL;
535
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800536 result = acpi_thermal_get_temperature(tz);
537 if (result)
538 return result;
539
Aaron Lu7b83fd92014-03-25 10:40:09 +0800540 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(tz->temperature,
541 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000542 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800543}
544
Zhang Rui3f655ef2008-01-17 15:51:11 +0800545static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000546 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800547{
548 struct acpi_thermal *tz = thermal->devdata;
549
550 if (!tz)
551 return -EINVAL;
552
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000553 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
554 THERMAL_DEVICE_DISABLED;
555
556 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800557}
558
559static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000560 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800561{
562 struct acpi_thermal *tz = thermal->devdata;
563 int enable;
564
565 if (!tz)
566 return -EINVAL;
567
568 /*
569 * enable/disable thermal management from ACPI thermal driver
570 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000571 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800572 enable = 1;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700573 else if (mode == THERMAL_DEVICE_DISABLED) {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800574 enable = 0;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700575 pr_warn("thermal zone will be disabled\n");
576 } else
Zhang Rui3f655ef2008-01-17 15:51:11 +0800577 return -EINVAL;
578
579 if (enable != tz->tz_enabled) {
580 tz->tz_enabled = enable;
581 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Rui8eaa8d62012-07-25 10:11:00 +0800582 "%s kernel ACPI thermal control\n",
583 tz->tz_enabled ? "Enable" : "Disable"));
Zhang Rui3f655ef2008-01-17 15:51:11 +0800584 acpi_thermal_check(tz);
585 }
586 return 0;
587}
588
589static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000590 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800591{
592 struct acpi_thermal *tz = thermal->devdata;
593 int i;
594
595 if (!tz || trip < 0)
596 return -EINVAL;
597
598 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000599 if (!trip) {
600 *type = THERMAL_TRIP_CRITICAL;
601 return 0;
602 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800603 trip--;
604 }
605
606 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000607 if (!trip) {
608 *type = THERMAL_TRIP_HOT;
609 return 0;
610 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800611 trip--;
612 }
613
614 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000615 if (!trip) {
616 *type = THERMAL_TRIP_PASSIVE;
617 return 0;
618 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800619 trip--;
620 }
621
622 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
623 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000624 if (!trip) {
625 *type = THERMAL_TRIP_ACTIVE;
626 return 0;
627 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800628 trip--;
629 }
630
631 return -EINVAL;
632}
633
634static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Sascha Hauer17e83512015-07-24 08:12:54 +0200635 int trip, int *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800636{
637 struct acpi_thermal *tz = thermal->devdata;
638 int i;
639
640 if (!tz || trip < 0)
641 return -EINVAL;
642
643 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000644 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800645 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200646 tz->trips.critical.temperature,
647 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000648 return 0;
649 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800650 trip--;
651 }
652
653 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000654 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800655 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200656 tz->trips.hot.temperature,
657 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000658 return 0;
659 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800660 trip--;
661 }
662
663 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000664 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800665 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200666 tz->trips.passive.temperature,
667 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000668 return 0;
669 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800670 trip--;
671 }
672
673 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
674 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000675 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800676 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200677 tz->trips.active[i].temperature,
678 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000679 return 0;
680 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800681 trip--;
682 }
683
684 return -EINVAL;
685}
686
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800687static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
Sascha Hauer17e83512015-07-24 08:12:54 +0200688 int *temperature)
689{
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800690 struct acpi_thermal *tz = thermal->devdata;
691
692 if (tz->trips.critical.flags.valid) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800693 *temperature = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200694 tz->trips.critical.temperature,
695 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800696 return 0;
697 } else
698 return -EINVAL;
699}
700
Zhang Rui601f3d42012-06-27 09:54:33 +0800701static int thermal_get_trend(struct thermal_zone_device *thermal,
702 int trip, enum thermal_trend *trend)
703{
704 struct acpi_thermal *tz = thermal->devdata;
705 enum thermal_trip_type type;
706 int i;
707
708 if (thermal_get_trip_type(thermal, trip, &type))
709 return -EINVAL;
710
Zhang Rui4ae46be2012-06-27 10:05:39 +0800711 if (type == THERMAL_TRIP_ACTIVE) {
Sascha Hauer17e83512015-07-24 08:12:54 +0200712 int trip_temp;
713 int temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Aaron Lu7b83fd92014-03-25 10:40:09 +0800714 tz->temperature, tz->kelvin_offset);
Zhang Rui94a40932013-04-26 09:19:53 +0000715 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
716 return -EINVAL;
717
718 if (temp > trip_temp) {
719 *trend = THERMAL_TREND_RAISING;
720 return 0;
721 } else {
722 /* Fall back on default trend */
723 return -EINVAL;
724 }
Zhang Rui4ae46be2012-06-27 10:05:39 +0800725 }
Zhang Rui601f3d42012-06-27 09:54:33 +0800726
727 /*
728 * tz->temperature has already been updated by generic thermal layer,
729 * before this callback being invoked
730 */
731 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
732 + (tz->trips.passive.tc2
733 * (tz->temperature - tz->trips.passive.temperature));
734
735 if (i > 0)
736 *trend = THERMAL_TREND_RAISING;
737 else if (i < 0)
738 *trend = THERMAL_TREND_DROPPING;
739 else
740 *trend = THERMAL_TREND_STABLE;
741 return 0;
742}
743
744
Matthew Garrettb1569e92008-12-03 17:55:32 +0000745static int thermal_notify(struct thermal_zone_device *thermal, int trip,
746 enum thermal_trip_type trip_type)
747{
748 u8 type = 0;
749 struct acpi_thermal *tz = thermal->devdata;
750
751 if (trip_type == THERMAL_TRIP_CRITICAL)
752 type = ACPI_THERMAL_NOTIFY_CRITICAL;
753 else if (trip_type == THERMAL_TRIP_HOT)
754 type = ACPI_THERMAL_NOTIFY_HOT;
755 else
756 return 0;
757
Matthew Garrettb1569e92008-12-03 17:55:32 +0000758 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100759 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000760
761 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
762 return 1;
763
764 return 0;
765}
766
Zhang Rui3f655ef2008-01-17 15:51:11 +0800767static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
768 struct thermal_cooling_device *cdev,
Zhang Rui9d998422012-06-26 16:35:57 +0800769 bool bind)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800770{
771 struct acpi_device *device = cdev->devdata;
772 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800773 struct acpi_device *dev;
774 acpi_status status;
775 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800776 int i;
777 int j;
778 int trip = -1;
779 int result = 0;
780
781 if (tz->trips.critical.flags.valid)
782 trip++;
783
784 if (tz->trips.hot.flags.valid)
785 trip++;
786
787 if (tz->trips.passive.flags.valid) {
788 trip++;
789 for (i = 0; i < tz->trips.passive.devices.count;
790 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800791 handle = tz->trips.passive.devices.handles[i];
792 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800793 if (ACPI_FAILURE(status) || dev != device)
794 continue;
795 if (bind)
796 result =
797 thermal_zone_bind_cooling_device
798 (thermal, trip, cdev,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000799 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
800 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800801 else
802 result =
803 thermal_zone_unbind_cooling_device
804 (thermal, trip, cdev);
805 if (result)
806 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800807 }
808 }
809
810 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
811 if (!tz->trips.active[i].flags.valid)
812 break;
813 trip++;
814 for (j = 0;
815 j < tz->trips.active[i].devices.count;
816 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800817 handle = tz->trips.active[i].devices.handles[j];
818 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800819 if (ACPI_FAILURE(status) || dev != device)
820 continue;
821 if (bind)
822 result = thermal_zone_bind_cooling_device
823 (thermal, trip, cdev,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000824 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
825 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800826 else
827 result = thermal_zone_unbind_cooling_device
828 (thermal, trip, cdev);
829 if (result)
830 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800831 }
832 }
833
834 for (i = 0; i < tz->devices.count; i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800835 handle = tz->devices.handles[i];
836 status = acpi_bus_get_device(handle, &dev);
837 if (ACPI_SUCCESS(status) && (dev == device)) {
Zhang Rui9d998422012-06-26 16:35:57 +0800838 if (bind)
839 result = thermal_zone_bind_cooling_device
Lan Tianyu70f29032013-08-14 21:00:39 +0800840 (thermal, THERMAL_TRIPS_NONE,
841 cdev, THERMAL_NO_LIMIT,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000842 THERMAL_NO_LIMIT,
843 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800844 else
845 result = thermal_zone_unbind_cooling_device
Lan Tianyu70f29032013-08-14 21:00:39 +0800846 (thermal, THERMAL_TRIPS_NONE,
847 cdev);
Zhang Rui653a00c2008-01-17 15:51:18 +0800848 if (result)
849 goto failed;
850 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800851 }
852
853failed:
854 return result;
855}
856
857static int
858acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
859 struct thermal_cooling_device *cdev)
860{
Zhang Rui9d998422012-06-26 16:35:57 +0800861 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800862}
863
864static int
865acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
866 struct thermal_cooling_device *cdev)
867{
Zhang Rui9d998422012-06-26 16:35:57 +0800868 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800869}
870
Emil Goodeec9c9c22014-01-07 17:24:55 +0100871static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800872 .bind = acpi_thermal_bind_cooling_device,
873 .unbind = acpi_thermal_unbind_cooling_device,
874 .get_temp = thermal_get_temp,
875 .get_mode = thermal_get_mode,
876 .set_mode = thermal_set_mode,
877 .get_trip_type = thermal_get_trip_type,
878 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800879 .get_crit_temp = thermal_get_crit_temp,
Zhang Rui601f3d42012-06-27 09:54:33 +0800880 .get_trend = thermal_get_trend,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000881 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800882};
883
884static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
885{
886 int trips = 0;
887 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800888 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800889 int i;
890
891 if (tz->trips.critical.flags.valid)
892 trips++;
893
894 if (tz->trips.hot.flags.valid)
895 trips++;
896
897 if (tz->trips.passive.flags.valid)
898 trips++;
899
900 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
901 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000902
903 if (tz->trips.passive.flags.valid)
904 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800905 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530906 &acpi_thermal_zone_ops, NULL,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000907 tz->trips.passive.tsp*100,
908 tz->polling_frequency*100);
909 else
910 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800911 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530912 &acpi_thermal_zone_ops, NULL,
913 0, tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700914 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800915 return -ENODEV;
916
917 result = sysfs_create_link(&tz->device->dev.kobj,
918 &tz->thermal_zone->device.kobj, "thermal_zone");
919 if (result)
920 return result;
921
922 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
923 &tz->device->dev.kobj, "device");
924 if (result)
925 return result;
926
Lan Tianyue6f8a4d2014-05-20 20:59:22 +0800927 status = acpi_bus_attach_private_data(tz->device->handle,
928 tz->thermal_zone);
929 if (ACPI_FAILURE(status))
Zhang Rui20733932008-01-17 15:51:21 +0800930 return -ENODEV;
Zhang Rui20733932008-01-17 15:51:21 +0800931
Zhang Rui3f655ef2008-01-17 15:51:11 +0800932 tz->tz_enabled = 1;
933
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200934 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
935 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800936 return 0;
937}
938
939static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
940{
941 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
942 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
943 thermal_zone_device_unregister(tz->thermal_zone);
944 tz->thermal_zone = NULL;
Lan Tianyue6f8a4d2014-05-20 20:59:22 +0800945 acpi_bus_detach_private_data(tz->device->handle);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800946}
947
948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 Driver Interface
951 -------------------------------------------------------------------------- */
952
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000953static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954{
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000955 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
958 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400959 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 switch (event) {
962 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
963 acpi_thermal_check(tz);
964 break;
965 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +0800966 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 acpi_thermal_check(tz);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800968 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100969 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 break;
971 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +0800972 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
973 acpi_thermal_check(tz);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800974 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100975 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 break;
977 default:
978 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400979 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 break;
981 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982}
983
Zhang Rui261cba22012-11-27 20:42:11 +0100984/*
985 * On some platforms, the AML code has dependency about
986 * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx.
987 * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after
988 * /_CRT/_HOT/_PSV/_ACx, or else system will be power off.
989 * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0
990 * if _TMP has never been evaluated.
991 *
992 * As this dependency is totally transparent to OS, evaluate
993 * all of them once, in the order of _CRT/_HOT/_PSV/_ACx,
994 * _TMP, before they are actually used.
995 */
996static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
997{
998 acpi_handle handle = tz->device->handle;
999 unsigned long long value;
1000 int i;
1001
1002 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1003 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1004 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1005 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1006 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1007 acpi_status status;
1008
1009 status = acpi_evaluate_integer(handle, name, NULL, &value);
1010 if (status == AE_NOT_FOUND)
1011 break;
1012 }
1013 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1014}
1015
Len Brown4be44fc2005-08-05 00:44:28 -04001016static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017{
Len Brown4be44fc2005-08-05 00:44:28 -04001018 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020
1021 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001022 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Zhang Rui261cba22012-11-27 20:42:11 +01001024 acpi_thermal_aml_dependency_fix(tz);
1025
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001026 /* Get trip points [_CRT, _PSV, etc.] (required) */
1027 result = acpi_thermal_get_trip_points(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001029 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001031 /* Get temperature [_TMP] (required) */
1032 result = acpi_thermal_get_temperature(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001034 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
1036 /* Set the cooling mode [_SCP] to active cooling (default) */
1037 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -04001038 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040
1041 /* Get default polling frequency [_TZP] (optional) */
1042 if (tzp)
1043 tz->polling_frequency = tzp;
1044 else
1045 acpi_thermal_get_polling_frequency(tz);
1046
Patrick Mocheld550d982006-06-27 00:41:40 -04001047 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
Jean Delvare13614e32009-04-06 16:01:46 +02001050/*
1051 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1052 * handles temperature values with a single decimal place. As a consequence,
1053 * some implementations use an offset of 273.1 and others use an offset of
1054 * 273.2. Try to find out which one is being used, to present the most
1055 * accurate and visually appealing number.
1056 *
1057 * The heuristic below should work for all ACPI thermal zones which have a
1058 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1059 */
1060static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1061{
1062 if (tz->trips.critical.flags.valid &&
1063 (tz->trips.critical.temperature % 5) == 1)
1064 tz->kelvin_offset = 2731;
1065 else
1066 tz->kelvin_offset = 2732;
1067}
1068
Aaron Lua59ffb22014-03-04 14:24:46 +08001069static void acpi_thermal_check_fn(struct work_struct *work)
1070{
1071 struct acpi_thermal *tz = container_of(work, struct acpi_thermal,
1072 thermal_check_work);
1073 acpi_thermal_check(tz);
1074}
1075
Len Brown4be44fc2005-08-05 00:44:28 -04001076static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
Len Brown4be44fc2005-08-05 00:44:28 -04001078 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -04001079 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
1082 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001083 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Burman Yan36bcbec2006-12-19 12:56:11 -08001085 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001087 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001089 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 strcpy(tz->name, device->pnp.bus_id);
1091 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1092 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001093 device->driver_data = tz;
Zhang Rui3f655ef2008-01-17 15:51:11 +08001094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 result = acpi_thermal_get_info(tz);
1096 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001097 goto free_memory;
1098
Jean Delvare13614e32009-04-06 16:01:46 +02001099 acpi_thermal_guess_offset(tz);
1100
Zhang Rui3f655ef2008-01-17 15:51:11 +08001101 result = acpi_thermal_register_thermal_zone(tz);
1102 if (result)
1103 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
Aaron Lua59ffb22014-03-04 14:24:46 +08001105 INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);
1106
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001107 pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device),
1108 acpi_device_bid(device), KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001109 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Zhang Rui3f655ef2008-01-17 15:51:11 +08001111free_memory:
1112 kfree(tz);
1113end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001114 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115}
1116
Rafael J. Wysocki51fac832013-01-24 00:24:48 +01001117static int acpi_thermal_remove(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118{
Len Brown4be44fc2005-08-05 00:44:28 -04001119 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001122 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Aaron Lua59ffb22014-03-04 14:24:46 +08001124 flush_workqueue(acpi_thermal_pm_queue);
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001125 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Zhang Rui3f655ef2008-01-17 15:51:11 +08001127 acpi_thermal_unregister_thermal_zone(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001129 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130}
1131
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001132#ifdef CONFIG_PM_SLEEP
Aaron Lua59ffb22014-03-04 14:24:46 +08001133static int acpi_thermal_suspend(struct device *dev)
1134{
1135 /* Make sure the previously queued thermal check work has been done */
1136 flush_workqueue(acpi_thermal_pm_queue);
1137 return 0;
1138}
1139
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001140static int acpi_thermal_resume(struct device *dev)
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001141{
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001142 struct acpi_thermal *tz;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001143 int i, j, power_state, result;
1144
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001145 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001146 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001147
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001148 tz = acpi_driver_data(to_acpi_device(dev));
1149 if (!tz)
1150 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001151
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001152 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001153 if (!(&tz->trips.active[i]))
1154 break;
1155 if (!tz->trips.active[i].flags.valid)
1156 break;
1157 tz->trips.active[i].flags.enabled = 1;
1158 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +01001159 result = acpi_bus_update_power(
1160 tz->trips.active[i].devices.handles[j],
1161 &power_state);
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001162 if (result || (power_state != ACPI_STATE_D0)) {
1163 tz->trips.active[i].flags.enabled = 0;
1164 break;
1165 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001166 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001167 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001168 }
1169
Aaron Lua59ffb22014-03-04 14:24:46 +08001170 queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001171
1172 return AE_OK;
1173}
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001174#endif
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001175
Jeff Garzik18552562007-10-03 15:15:40 -04001176static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001177
1178 if (act == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001179 pr_notice(PREFIX "%s detected: "
1180 "disabling all active thermal trip points\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001181 act = -1;
1182 }
1183 return 0;
1184}
Jeff Garzik18552562007-10-03 15:15:40 -04001185static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001186
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001187 pr_notice(PREFIX "%s detected: "
1188 "disabling all critical thermal trip point actions.\n", d->ident);
Len Brown8c99fdc2007-08-20 18:46:50 -04001189 nocrt = 1;
1190 return 0;
1191}
Jeff Garzik18552562007-10-03 15:15:40 -04001192static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001193
1194 if (tzp == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001195 pr_notice(PREFIX "%s detected: "
1196 "enabling thermal zone polling\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001197 tzp = 300; /* 300 dS = 30 Seconds */
1198 }
1199 return 0;
1200}
Jeff Garzik18552562007-10-03 15:15:40 -04001201static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001202
1203 if (psv == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001204 pr_notice(PREFIX "%s detected: "
1205 "disabling all passive thermal trip points\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001206 psv = -1;
1207 }
1208 return 0;
1209}
1210
1211static struct dmi_system_id thermal_dmi_table[] __initdata = {
1212 /*
1213 * Award BIOS on this AOpen makes thermal control almost worthless.
1214 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1215 */
1216 {
1217 .callback = thermal_act,
1218 .ident = "AOpen i915GMm-HFS",
1219 .matches = {
1220 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1221 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1222 },
1223 },
1224 {
1225 .callback = thermal_psv,
1226 .ident = "AOpen i915GMm-HFS",
1227 .matches = {
1228 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1229 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1230 },
1231 },
1232 {
1233 .callback = thermal_tzp,
1234 .ident = "AOpen i915GMm-HFS",
1235 .matches = {
1236 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1237 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1238 },
1239 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001240 {
1241 .callback = thermal_nocrt,
1242 .ident = "Gigabyte GA-7ZX",
1243 .matches = {
1244 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1245 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1246 },
1247 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001248 {}
1249};
Len Brown0b5bfa12007-08-12 00:13:02 -04001250
Len Brown4be44fc2005-08-05 00:44:28 -04001251static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
Len Brown4be44fc2005-08-05 00:44:28 -04001253 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Len Brown0b5bfa12007-08-12 00:13:02 -04001255 dmi_check_system(thermal_dmi_table);
1256
Len Brown72b33ef2007-08-12 00:12:17 -04001257 if (off) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001258 pr_notice(PREFIX "thermal control disabled\n");
Len Brown72b33ef2007-08-12 00:12:17 -04001259 return -ENODEV;
1260 }
Zhang Rui43d9f872010-07-15 10:46:44 +08001261
Aaron Lua59ffb22014-03-04 14:24:46 +08001262 acpi_thermal_pm_queue = create_workqueue("acpi_thermal_pm");
1263 if (!acpi_thermal_pm_queue)
Patrick Mocheld550d982006-06-27 00:41:40 -04001264 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Aaron Lua59ffb22014-03-04 14:24:46 +08001266 result = acpi_bus_register_driver(&acpi_thermal_driver);
1267 if (result < 0) {
1268 destroy_workqueue(acpi_thermal_pm_queue);
1269 return -ENODEV;
1270 }
1271
Patrick Mocheld550d982006-06-27 00:41:40 -04001272 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
Len Brown4be44fc2005-08-05 00:44:28 -04001275static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 acpi_bus_unregister_driver(&acpi_thermal_driver);
Aaron Lu2807bd12014-05-26 14:34:07 +02001278 destroy_workqueue(acpi_thermal_pm_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279
Patrick Mocheld550d982006-06-27 00:41:40 -04001280 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281}
1282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283module_init(acpi_thermal_init);
1284module_exit(acpi_thermal_exit);