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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>
Zhang Rui3f655ef2008-01-17 15:51:11 +080044#include <linux/thermal.h>
Lv Zheng8b484632013-12-03 08:49:16 +080045#include <linux/acpi.h>
Aaron Lua59ffb22014-03-04 14:24:46 +080046#include <linux/workqueue.h>
Lv Zheng8b484632013-12-03 08:49:16 +080047#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
54#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
55#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
56#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
57#define ACPI_THERMAL_NOTIFY_HOT 0xF1
58#define ACPI_THERMAL_MODE_ACTIVE 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60#define ACPI_THERMAL_MAX_ACTIVE 10
61#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define _COMPONENT ACPI_THERMAL_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050064ACPI_MODULE_NAME("thermal");
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Thomas Renninger1cbf4c52004-09-16 11:07:00 -040066MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050067MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070068MODULE_LICENSE("GPL");
69
Len Brownf8707ec2007-08-12 00:12:54 -040070static int act;
71module_param(act, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040072MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
Len Brownf8707ec2007-08-12 00:12:54 -040073
Len Brownc52a7412007-08-14 15:49:32 -040074static int crt;
75module_param(crt, int, 0644);
76MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078static int tzp;
Len Brown730ff342007-08-12 00:12:26 -040079module_param(tzp, int, 0444);
Len Brown3c1d36d2007-08-14 15:12:56 -040080MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
Len Brownf5487142007-08-12 00:12:44 -040082static int nocrt;
83module_param(nocrt, int, 0);
Len Brown8c99fdc2007-08-20 18:46:50 -040084MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
Len Brownf5487142007-08-12 00:12:44 -040085
Len Brown72b33ef2007-08-12 00:12:17 -040086static int off;
87module_param(off, int, 0);
Len Brown3c1d36d2007-08-14 15:12:56 -040088MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
Len Brown72b33ef2007-08-12 00:12:17 -040089
Len Browna70cdc52007-08-12 00:12:35 -040090static int psv;
91module_param(psv, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040092MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
Len Browna70cdc52007-08-12 00:12:35 -040093
Aaron Lua59ffb22014-03-04 14:24:46 +080094static struct workqueue_struct *acpi_thermal_pm_queue;
95
Len Brown4be44fc2005-08-05 00:44:28 -040096static int acpi_thermal_add(struct acpi_device *device);
Rafael J. Wysocki51fac832013-01-24 00:24:48 +010097static int acpi_thermal_remove(struct acpi_device *device);
Bjorn Helgaas342d5502009-04-07 15:37:06 +000098static void acpi_thermal_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200100static const struct acpi_device_id thermal_device_ids[] = {
101 {ACPI_THERMAL_HID, 0},
102 {"", 0},
103};
104MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
105
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200106#ifdef CONFIG_PM_SLEEP
Aaron Lua59ffb22014-03-04 14:24:46 +0800107static int acpi_thermal_suspend(struct device *dev);
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200108static int acpi_thermal_resume(struct device *dev);
Shuah Khanfae9e2a2014-02-12 20:19:10 -0700109#else
Aaron Lua59ffb22014-03-04 14:24:46 +0800110#define acpi_thermal_suspend NULL
Shuah Khanfae9e2a2014-02-12 20:19:10 -0700111#define acpi_thermal_resume NULL
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200112#endif
Aaron Lua59ffb22014-03-04 14:24:46 +0800113static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, acpi_thermal_suspend, acpi_thermal_resume);
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115static struct acpi_driver acpi_thermal_driver = {
Len Brownc2b67052007-02-12 23:33:40 -0500116 .name = "thermal",
Len Brown4be44fc2005-08-05 00:44:28 -0400117 .class = ACPI_THERMAL_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200118 .ids = thermal_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -0400119 .ops = {
120 .add = acpi_thermal_add,
121 .remove = acpi_thermal_remove,
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000122 .notify = acpi_thermal_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400123 },
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200124 .drv.pm = &acpi_thermal_pm,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125};
126
127struct acpi_thermal_state {
Len Brown4be44fc2005-08-05 00:44:28 -0400128 u8 critical:1;
129 u8 hot:1;
130 u8 passive:1;
131 u8 active:1;
132 u8 reserved:4;
133 int active_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134};
135
136struct acpi_thermal_state_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400137 u8 valid:1;
138 u8 enabled:1;
139 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140};
141
142struct acpi_thermal_critical {
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_hot {
148 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400149 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150};
151
152struct acpi_thermal_passive {
153 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400154 unsigned long temperature;
155 unsigned long tc1;
156 unsigned long tc2;
157 unsigned long tsp;
158 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159};
160
161struct acpi_thermal_active {
162 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400163 unsigned long temperature;
164 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165};
166
167struct acpi_thermal_trips {
168 struct acpi_thermal_critical critical;
Len Brown4be44fc2005-08-05 00:44:28 -0400169 struct acpi_thermal_hot hot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 struct acpi_thermal_passive passive;
171 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
172};
173
174struct acpi_thermal_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400175 u8 cooling_mode:1; /* _SCP */
176 u8 devices:1; /* _TZD */
177 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178};
179
180struct acpi_thermal {
Patrick Mochel8348e1b2006-05-19 16:54:40 -0400181 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -0400182 acpi_bus_id name;
183 unsigned long temperature;
184 unsigned long last_temperature;
185 unsigned long polling_frequency;
Len Brown4be44fc2005-08-05 00:44:28 -0400186 volatile u8 zombie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 struct acpi_thermal_flags flags;
188 struct acpi_thermal_state state;
189 struct acpi_thermal_trips trips;
Len Brown4be44fc2005-08-05 00:44:28 -0400190 struct acpi_handle_list devices;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800191 struct thermal_zone_device *thermal_zone;
192 int tz_enabled;
Jean Delvare13614e32009-04-06 16:01:46 +0200193 int kelvin_offset;
Aaron Lua59ffb22014-03-04 14:24:46 +0800194 struct work_struct thermal_check_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195};
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197/* --------------------------------------------------------------------------
198 Thermal Zone Management
199 -------------------------------------------------------------------------- */
200
Len Brown4be44fc2005-08-05 00:44:28 -0400201static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
Len Brown4be44fc2005-08-05 00:44:28 -0400203 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400204 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400207 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 tz->last_temperature = tz->temperature;
210
Matthew Wilcox27663c52008-10-10 02:22:59 -0400211 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400213 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Matthew Wilcox27663c52008-10-10 02:22:59 -0400215 tz->temperature = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400216 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
217 tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Patrick Mocheld550d982006-06-27 00:41:40 -0400219 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Len Brown4be44fc2005-08-05 00:44:28 -0400222static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
Len Brown4be44fc2005-08-05 00:44:28 -0400224 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400225 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400228 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Matthew Wilcox27663c52008-10-10 02:22:59 -0400230 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400232 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Matthew Wilcox27663c52008-10-10 02:22:59 -0400234 tz->polling_frequency = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400235 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
236 tz->polling_frequency));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Patrick Mocheld550d982006-06-27 00:41:40 -0400238 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Len Brown4be44fc2005-08-05 00:44:28 -0400241static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400244 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Jiang Liu0db98202013-06-29 00:24:39 +0800246 if (!acpi_has_method(tz->device->handle, "_SCP")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400248 return -ENODEV;
Jiang Liu0db98202013-06-29 00:24:39 +0800249 } else if (ACPI_FAILURE(acpi_execute_simple_method(tz->device->handle,
250 "_SCP", mode))) {
Patrick Mocheld550d982006-06-27 00:41:40 -0400251 return -ENODEV;
Jiang Liu0db98202013-06-29 00:24:39 +0800252 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Patrick Mocheld550d982006-06-27 00:41:40 -0400254 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
Zhang Ruice44e192008-01-17 15:51:25 +0800257#define ACPI_TRIPS_CRITICAL 0x01
258#define ACPI_TRIPS_HOT 0x02
259#define ACPI_TRIPS_PASSIVE 0x04
260#define ACPI_TRIPS_ACTIVE 0x08
261#define ACPI_TRIPS_DEVICES 0x10
262
263#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
264#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
265
266#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
267 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
268 ACPI_TRIPS_DEVICES)
269
270/*
271 * This exception is thrown out in two cases:
272 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
273 * when re-evaluating the AML code.
274 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
275 * We need to re-bind the cooling devices of a thermal zone when this occurs.
276 */
277#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
278do { \
279 if (flags != ACPI_TRIPS_INIT) \
280 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
281 "ACPI thermal trip point %s changed\n" \
Colin Ian King7e3cf242012-11-29 11:53:16 +0000282 "Please send acpidump to linux-acpi@vger.kernel.org", str)); \
Zhang Ruice44e192008-01-17 15:51:25 +0800283} while (0)
284
285static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
Len Brown4be44fc2005-08-05 00:44:28 -0400287 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400288 unsigned long long tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800289 struct acpi_handle_list devices;
290 int valid = 0;
291 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Thomas Renningerfa809452010-02-20 11:44:27 +0100293 /* Critical Shutdown */
Zhang Ruice44e192008-01-17 15:51:25 +0800294 if (flag & ACPI_TRIPS_CRITICAL) {
295 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400296 "_CRT", NULL, &tmp);
297 tz->trips.critical.temperature = tmp;
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700298 /*
299 * Treat freezing temperatures as invalid as well; some
300 * BIOSes return really low values and cause reboots at startup.
Adam Buchbinderb731d7b2009-03-13 12:15:26 -0400301 * Below zero (Celsius) values clearly aren't right for sure..
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700302 * ... so lets discard those as invalid.
303 */
Thomas Renningerfa809452010-02-20 11:44:27 +0100304 if (ACPI_FAILURE(status)) {
Len Brownc52a7412007-08-14 15:49:32 -0400305 tz->trips.critical.flags.valid = 0;
Thomas Renningerfa809452010-02-20 11:44:27 +0100306 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
307 "No critical threshold\n"));
308 } else if (tmp <= 2732) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300309 pr_warn(FW_BUG "Invalid critical threshold (%llu)\n",
310 tmp);
Thomas Renningerfa809452010-02-20 11:44:27 +0100311 tz->trips.critical.flags.valid = 0;
Zhang Ruice44e192008-01-17 15:51:25 +0800312 } else {
313 tz->trips.critical.flags.valid = 1;
314 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Thomas Renningerfa809452010-02-20 11:44:27 +0100315 "Found critical threshold [%lu]\n",
316 tz->trips.critical.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800317 }
318 if (tz->trips.critical.flags.valid == 1) {
319 if (crt == -1) {
320 tz->trips.critical.flags.valid = 0;
321 } else if (crt > 0) {
322 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
323 /*
Zhang Rui22a94d72008-10-17 02:41:20 -0400324 * Allow override critical threshold
Zhang Ruice44e192008-01-17 15:51:25 +0800325 */
Zhang Rui22a94d72008-10-17 02:41:20 -0400326 if (crt_k > tz->trips.critical.temperature)
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300327 pr_warn(PREFIX "Critical threshold %d C\n",
328 crt);
Zhang Rui22a94d72008-10-17 02:41:20 -0400329 tz->trips.critical.temperature = crt_k;
Zhang Ruice44e192008-01-17 15:51:25 +0800330 }
Len Brownc52a7412007-08-14 15:49:32 -0400331 }
332 }
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 /* Critical Sleep (optional) */
Zhang Ruice44e192008-01-17 15:51:25 +0800335 if (flag & ACPI_TRIPS_HOT) {
Len Browna70cdc52007-08-12 00:12:35 -0400336 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400337 "_HOT", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800338 if (ACPI_FAILURE(status)) {
339 tz->trips.hot.flags.valid = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400340 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Ruice44e192008-01-17 15:51:25 +0800341 "No hot threshold\n"));
342 } else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400343 tz->trips.hot.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800344 tz->trips.hot.flags.valid = 1;
345 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
346 "Found hot threshold [%lu]\n",
Zhihui Zhangee17fdf2014-03-29 09:25:47 -0400347 tz->trips.hot.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800348 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 }
350
Zhang Ruice44e192008-01-17 15:51:25 +0800351 /* Passive (optional) */
Zhang Rui0e4240d2009-01-16 12:53:42 -0500352 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
353 (flag == ACPI_TRIPS_INIT)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800354 valid = tz->trips.passive.flags.valid;
355 if (psv == -1) {
356 status = AE_SUPPORT;
357 } else if (psv > 0) {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400358 tmp = CELSIUS_TO_KELVIN(psv);
Zhang Ruice44e192008-01-17 15:51:25 +0800359 status = AE_OK;
360 } else {
361 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400362 "_PSV", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800363 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Zhang Ruice44e192008-01-17 15:51:25 +0800365 if (ACPI_FAILURE(status))
366 tz->trips.passive.flags.valid = 0;
367 else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400368 tz->trips.passive.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800369 tz->trips.passive.flags.valid = 1;
370 if (flag == ACPI_TRIPS_INIT) {
371 status = acpi_evaluate_integer(
372 tz->device->handle, "_TC1",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400373 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800374 if (ACPI_FAILURE(status))
375 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400376 else
377 tz->trips.passive.tc1 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800378 status = acpi_evaluate_integer(
379 tz->device->handle, "_TC2",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400380 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800381 if (ACPI_FAILURE(status))
382 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400383 else
384 tz->trips.passive.tc2 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800385 status = acpi_evaluate_integer(
386 tz->device->handle, "_TSP",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400387 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800388 if (ACPI_FAILURE(status))
389 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400390 else
391 tz->trips.passive.tsp = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800392 }
393 }
394 }
395 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
396 memset(&devices, 0, sizeof(struct acpi_handle_list));
397 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
398 NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500399 if (ACPI_FAILURE(status)) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300400 pr_warn(PREFIX "Invalid passive threshold\n");
Zhang Ruice44e192008-01-17 15:51:25 +0800401 tz->trips.passive.flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500402 }
Zhang Ruice44e192008-01-17 15:51:25 +0800403 else
404 tz->trips.passive.flags.valid = 1;
405
406 if (memcmp(&tz->trips.passive.devices, &devices,
407 sizeof(struct acpi_handle_list))) {
408 memcpy(&tz->trips.passive.devices, &devices,
409 sizeof(struct acpi_handle_list));
410 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
411 }
412 }
413 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
414 if (valid != tz->trips.passive.flags.valid)
415 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
416 }
417
418 /* Active (optional) */
Len Brown4be44fc2005-08-05 00:44:28 -0400419 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400420 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
Zhang Ruice44e192008-01-17 15:51:25 +0800421 valid = tz->trips.active[i].flags.valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Len Brownf8707ec2007-08-12 00:12:54 -0400423 if (act == -1)
Zhang Ruice44e192008-01-17 15:51:25 +0800424 break; /* disable all active trip points */
Len Brownf8707ec2007-08-12 00:12:54 -0400425
Zhang Rui0e4240d2009-01-16 12:53:42 -0500426 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
427 tz->trips.active[i].flags.valid)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800428 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400429 name, NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800430 if (ACPI_FAILURE(status)) {
431 tz->trips.active[i].flags.valid = 0;
432 if (i == 0)
433 break;
434 if (act <= 0)
435 break;
436 if (i == 1)
437 tz->trips.active[0].temperature =
438 CELSIUS_TO_KELVIN(act);
439 else
440 /*
441 * Don't allow override higher than
442 * the next higher trip point
443 */
444 tz->trips.active[i - 1].temperature =
445 (tz->trips.active[i - 2].temperature <
446 CELSIUS_TO_KELVIN(act) ?
447 tz->trips.active[i - 2].temperature :
448 CELSIUS_TO_KELVIN(act));
Len Brownf8707ec2007-08-12 00:12:54 -0400449 break;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400450 } else {
451 tz->trips.active[i].temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800452 tz->trips.active[i].flags.valid = 1;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400453 }
Len Brownf8707ec2007-08-12 00:12:54 -0400454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456 name[2] = 'L';
Zhang Ruice44e192008-01-17 15:51:25 +0800457 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
458 memset(&devices, 0, sizeof(struct acpi_handle_list));
459 status = acpi_evaluate_reference(tz->device->handle,
460 name, NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500461 if (ACPI_FAILURE(status)) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300462 pr_warn(PREFIX "Invalid active%d threshold\n",
463 i);
Zhang Ruice44e192008-01-17 15:51:25 +0800464 tz->trips.active[i].flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500465 }
Zhang Ruice44e192008-01-17 15:51:25 +0800466 else
467 tz->trips.active[i].flags.valid = 1;
468
469 if (memcmp(&tz->trips.active[i].devices, &devices,
470 sizeof(struct acpi_handle_list))) {
471 memcpy(&tz->trips.active[i].devices, &devices,
472 sizeof(struct acpi_handle_list));
473 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
474 }
475 }
476 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
477 if (valid != tz->trips.active[i].flags.valid)
478 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
479
480 if (!tz->trips.active[i].flags.valid)
481 break;
482 }
483
Lan Tianyu668e0202013-08-27 16:29:31 +0800484 if ((flag & ACPI_TRIPS_DEVICES)
485 && acpi_has_method(tz->device->handle, "_TZD")) {
486 memset(&devices, 0, sizeof(devices));
Zhang Ruice44e192008-01-17 15:51:25 +0800487 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
488 NULL, &devices);
Lan Tianyu668e0202013-08-27 16:29:31 +0800489 if (ACPI_SUCCESS(status)
490 && memcmp(&tz->devices, &devices, sizeof(devices))) {
491 tz->devices = devices;
Zhang Ruice44e192008-01-17 15:51:25 +0800492 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
493 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
495
Patrick Mocheld550d982006-06-27 00:41:40 -0400496 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
Zhang Ruice44e192008-01-17 15:51:25 +0800499static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100501 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
502
503 if (ret)
504 return ret;
505
506 valid = tz->trips.critical.flags.valid |
507 tz->trips.hot.flags.valid |
508 tz->trips.passive.flags.valid;
509
510 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
511 valid |= tz->trips.active[i].flags.valid;
512
513 if (!valid) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +0300514 pr_warn(FW_BUG "No valid trip found\n");
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100515 return -ENODEV;
516 }
517 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519
Len Brown4be44fc2005-08-05 00:44:28 -0400520static void acpi_thermal_check(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200522 struct acpi_thermal *tz = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700524 if (!tz->tz_enabled)
Srinivas Pandruvadaca4e7132013-01-15 23:57:16 +0100525 return;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700526
Matthew Garrettb1569e92008-12-03 17:55:32 +0000527 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528}
529
Zhang Rui3f655ef2008-01-17 15:51:11 +0800530/* sys I/F for generic thermal sysfs support */
Zhang, Rui5e012762008-02-28 07:51:30 +0800531
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000532static int thermal_get_temp(struct thermal_zone_device *thermal,
533 unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800534{
535 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800536 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800537
538 if (!tz)
539 return -EINVAL;
540
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800541 result = acpi_thermal_get_temperature(tz);
542 if (result)
543 return result;
544
Aaron Lu7b83fd92014-03-25 10:40:09 +0800545 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(tz->temperature,
546 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000547 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800548}
549
Zhang Rui3f655ef2008-01-17 15:51:11 +0800550static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000551 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800552{
553 struct acpi_thermal *tz = thermal->devdata;
554
555 if (!tz)
556 return -EINVAL;
557
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000558 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
559 THERMAL_DEVICE_DISABLED;
560
561 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800562}
563
564static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000565 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800566{
567 struct acpi_thermal *tz = thermal->devdata;
568 int enable;
569
570 if (!tz)
571 return -EINVAL;
572
573 /*
574 * enable/disable thermal management from ACPI thermal driver
575 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000576 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800577 enable = 1;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700578 else if (mode == THERMAL_DEVICE_DISABLED) {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800579 enable = 0;
Srinivas Pandruvadae994d712013-09-25 09:29:50 -0700580 pr_warn("thermal zone will be disabled\n");
581 } else
Zhang Rui3f655ef2008-01-17 15:51:11 +0800582 return -EINVAL;
583
584 if (enable != tz->tz_enabled) {
585 tz->tz_enabled = enable;
586 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Rui8eaa8d62012-07-25 10:11:00 +0800587 "%s kernel ACPI thermal control\n",
588 tz->tz_enabled ? "Enable" : "Disable"));
Zhang Rui3f655ef2008-01-17 15:51:11 +0800589 acpi_thermal_check(tz);
590 }
591 return 0;
592}
593
594static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000595 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800596{
597 struct acpi_thermal *tz = thermal->devdata;
598 int i;
599
600 if (!tz || trip < 0)
601 return -EINVAL;
602
603 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000604 if (!trip) {
605 *type = THERMAL_TRIP_CRITICAL;
606 return 0;
607 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800608 trip--;
609 }
610
611 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000612 if (!trip) {
613 *type = THERMAL_TRIP_HOT;
614 return 0;
615 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800616 trip--;
617 }
618
619 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000620 if (!trip) {
621 *type = THERMAL_TRIP_PASSIVE;
622 return 0;
623 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800624 trip--;
625 }
626
627 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
628 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000629 if (!trip) {
630 *type = THERMAL_TRIP_ACTIVE;
631 return 0;
632 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800633 trip--;
634 }
635
636 return -EINVAL;
637}
638
639static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000640 int trip, unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800641{
642 struct acpi_thermal *tz = thermal->devdata;
643 int i;
644
645 if (!tz || trip < 0)
646 return -EINVAL;
647
648 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000649 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800650 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200651 tz->trips.critical.temperature,
652 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000653 return 0;
654 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800655 trip--;
656 }
657
658 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000659 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800660 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200661 tz->trips.hot.temperature,
662 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000663 return 0;
664 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800665 trip--;
666 }
667
668 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000669 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800670 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200671 tz->trips.passive.temperature,
672 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000673 return 0;
674 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800675 trip--;
676 }
677
678 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
679 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000680 if (!trip) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800681 *temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200682 tz->trips.active[i].temperature,
683 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000684 return 0;
685 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800686 trip--;
687 }
688
689 return -EINVAL;
690}
691
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800692static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
693 unsigned long *temperature) {
694 struct acpi_thermal *tz = thermal->devdata;
695
696 if (tz->trips.critical.flags.valid) {
Aaron Lu7b83fd92014-03-25 10:40:09 +0800697 *temperature = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
Jean Delvare13614e32009-04-06 16:01:46 +0200698 tz->trips.critical.temperature,
699 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800700 return 0;
701 } else
702 return -EINVAL;
703}
704
Zhang Rui601f3d42012-06-27 09:54:33 +0800705static int thermal_get_trend(struct thermal_zone_device *thermal,
706 int trip, enum thermal_trend *trend)
707{
708 struct acpi_thermal *tz = thermal->devdata;
709 enum thermal_trip_type type;
710 int i;
711
712 if (thermal_get_trip_type(thermal, trip, &type))
713 return -EINVAL;
714
Zhang Rui4ae46be2012-06-27 10:05:39 +0800715 if (type == THERMAL_TRIP_ACTIVE) {
Zhang Rui94a40932013-04-26 09:19:53 +0000716 unsigned long trip_temp;
Aaron Lu7b83fd92014-03-25 10:40:09 +0800717 unsigned long temp = DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(
718 tz->temperature, tz->kelvin_offset);
Zhang Rui94a40932013-04-26 09:19:53 +0000719 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
720 return -EINVAL;
721
722 if (temp > trip_temp) {
723 *trend = THERMAL_TREND_RAISING;
724 return 0;
725 } else {
726 /* Fall back on default trend */
727 return -EINVAL;
728 }
Zhang Rui4ae46be2012-06-27 10:05:39 +0800729 }
Zhang Rui601f3d42012-06-27 09:54:33 +0800730
731 /*
732 * tz->temperature has already been updated by generic thermal layer,
733 * before this callback being invoked
734 */
735 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
736 + (tz->trips.passive.tc2
737 * (tz->temperature - tz->trips.passive.temperature));
738
739 if (i > 0)
740 *trend = THERMAL_TREND_RAISING;
741 else if (i < 0)
742 *trend = THERMAL_TREND_DROPPING;
743 else
744 *trend = THERMAL_TREND_STABLE;
745 return 0;
746}
747
748
Matthew Garrettb1569e92008-12-03 17:55:32 +0000749static int thermal_notify(struct thermal_zone_device *thermal, int trip,
750 enum thermal_trip_type trip_type)
751{
752 u8 type = 0;
753 struct acpi_thermal *tz = thermal->devdata;
754
755 if (trip_type == THERMAL_TRIP_CRITICAL)
756 type = ACPI_THERMAL_NOTIFY_CRITICAL;
757 else if (trip_type == THERMAL_TRIP_HOT)
758 type = ACPI_THERMAL_NOTIFY_HOT;
759 else
760 return 0;
761
Matthew Garrettb1569e92008-12-03 17:55:32 +0000762 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100763 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000764
765 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
766 return 1;
767
768 return 0;
769}
770
Zhang Rui3f655ef2008-01-17 15:51:11 +0800771static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
772 struct thermal_cooling_device *cdev,
Zhang Rui9d998422012-06-26 16:35:57 +0800773 bool bind)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800774{
775 struct acpi_device *device = cdev->devdata;
776 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800777 struct acpi_device *dev;
778 acpi_status status;
779 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800780 int i;
781 int j;
782 int trip = -1;
783 int result = 0;
784
785 if (tz->trips.critical.flags.valid)
786 trip++;
787
788 if (tz->trips.hot.flags.valid)
789 trip++;
790
791 if (tz->trips.passive.flags.valid) {
792 trip++;
793 for (i = 0; i < tz->trips.passive.devices.count;
794 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800795 handle = tz->trips.passive.devices.handles[i];
796 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800797 if (ACPI_FAILURE(status) || dev != device)
798 continue;
799 if (bind)
800 result =
801 thermal_zone_bind_cooling_device
802 (thermal, trip, cdev,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000803 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
804 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800805 else
806 result =
807 thermal_zone_unbind_cooling_device
808 (thermal, trip, cdev);
809 if (result)
810 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800811 }
812 }
813
814 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
815 if (!tz->trips.active[i].flags.valid)
816 break;
817 trip++;
818 for (j = 0;
819 j < tz->trips.active[i].devices.count;
820 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800821 handle = tz->trips.active[i].devices.handles[j];
822 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800823 if (ACPI_FAILURE(status) || dev != device)
824 continue;
825 if (bind)
826 result = thermal_zone_bind_cooling_device
827 (thermal, trip, cdev,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000828 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
829 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800830 else
831 result = thermal_zone_unbind_cooling_device
832 (thermal, trip, cdev);
833 if (result)
834 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800835 }
836 }
837
838 for (i = 0; i < tz->devices.count; i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800839 handle = tz->devices.handles[i];
840 status = acpi_bus_get_device(handle, &dev);
841 if (ACPI_SUCCESS(status) && (dev == device)) {
Zhang Rui9d998422012-06-26 16:35:57 +0800842 if (bind)
843 result = thermal_zone_bind_cooling_device
Lan Tianyu70f29032013-08-14 21:00:39 +0800844 (thermal, THERMAL_TRIPS_NONE,
845 cdev, THERMAL_NO_LIMIT,
Kapileshwar Singh6cd9e9f2015-02-18 16:04:21 +0000846 THERMAL_NO_LIMIT,
847 THERMAL_WEIGHT_DEFAULT);
Zhang Rui9d998422012-06-26 16:35:57 +0800848 else
849 result = thermal_zone_unbind_cooling_device
Lan Tianyu70f29032013-08-14 21:00:39 +0800850 (thermal, THERMAL_TRIPS_NONE,
851 cdev);
Zhang Rui653a00c2008-01-17 15:51:18 +0800852 if (result)
853 goto failed;
854 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800855 }
856
857failed:
858 return result;
859}
860
861static int
862acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
863 struct thermal_cooling_device *cdev)
864{
Zhang Rui9d998422012-06-26 16:35:57 +0800865 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800866}
867
868static int
869acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
870 struct thermal_cooling_device *cdev)
871{
Zhang Rui9d998422012-06-26 16:35:57 +0800872 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800873}
874
Emil Goodeec9c9c22014-01-07 17:24:55 +0100875static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800876 .bind = acpi_thermal_bind_cooling_device,
877 .unbind = acpi_thermal_unbind_cooling_device,
878 .get_temp = thermal_get_temp,
879 .get_mode = thermal_get_mode,
880 .set_mode = thermal_set_mode,
881 .get_trip_type = thermal_get_trip_type,
882 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800883 .get_crit_temp = thermal_get_crit_temp,
Zhang Rui601f3d42012-06-27 09:54:33 +0800884 .get_trend = thermal_get_trend,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000885 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800886};
887
888static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
889{
890 int trips = 0;
891 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800892 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800893 int i;
894
895 if (tz->trips.critical.flags.valid)
896 trips++;
897
898 if (tz->trips.hot.flags.valid)
899 trips++;
900
901 if (tz->trips.passive.flags.valid)
902 trips++;
903
904 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
905 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000906
907 if (tz->trips.passive.flags.valid)
908 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800909 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530910 &acpi_thermal_zone_ops, NULL,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000911 tz->trips.passive.tsp*100,
912 tz->polling_frequency*100);
913 else
914 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800915 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530916 &acpi_thermal_zone_ops, NULL,
917 0, tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700918 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800919 return -ENODEV;
920
921 result = sysfs_create_link(&tz->device->dev.kobj,
922 &tz->thermal_zone->device.kobj, "thermal_zone");
923 if (result)
924 return result;
925
926 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
927 &tz->device->dev.kobj, "device");
928 if (result)
929 return result;
930
Lan Tianyue6f8a4d2014-05-20 20:59:22 +0800931 status = acpi_bus_attach_private_data(tz->device->handle,
932 tz->thermal_zone);
933 if (ACPI_FAILURE(status))
Zhang Rui20733932008-01-17 15:51:21 +0800934 return -ENODEV;
Zhang Rui20733932008-01-17 15:51:21 +0800935
Zhang Rui3f655ef2008-01-17 15:51:11 +0800936 tz->tz_enabled = 1;
937
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200938 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
939 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800940 return 0;
941}
942
943static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
944{
945 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
946 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
947 thermal_zone_device_unregister(tz->thermal_zone);
948 tz->thermal_zone = NULL;
Lan Tianyue6f8a4d2014-05-20 20:59:22 +0800949 acpi_bus_detach_private_data(tz->device->handle);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800950}
951
952
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 Driver Interface
955 -------------------------------------------------------------------------- */
956
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000957static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958{
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000959 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
962 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400963 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 switch (event) {
966 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
967 acpi_thermal_check(tz);
968 break;
969 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +0800970 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 acpi_thermal_check(tz);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800972 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100973 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 break;
975 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +0800976 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
977 acpi_thermal_check(tz);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800978 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100979 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 break;
981 default:
982 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400983 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 break;
985 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986}
987
Zhang Rui261cba22012-11-27 20:42:11 +0100988/*
989 * On some platforms, the AML code has dependency about
990 * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx.
991 * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after
992 * /_CRT/_HOT/_PSV/_ACx, or else system will be power off.
993 * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0
994 * if _TMP has never been evaluated.
995 *
996 * As this dependency is totally transparent to OS, evaluate
997 * all of them once, in the order of _CRT/_HOT/_PSV/_ACx,
998 * _TMP, before they are actually used.
999 */
1000static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
1001{
1002 acpi_handle handle = tz->device->handle;
1003 unsigned long long value;
1004 int i;
1005
1006 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1007 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1008 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1009 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1010 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1011 acpi_status status;
1012
1013 status = acpi_evaluate_integer(handle, name, NULL, &value);
1014 if (status == AE_NOT_FOUND)
1015 break;
1016 }
1017 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1018}
1019
Len Brown4be44fc2005-08-05 00:44:28 -04001020static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021{
Len Brown4be44fc2005-08-05 00:44:28 -04001022 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
1025 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001026 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Zhang Rui261cba22012-11-27 20:42:11 +01001028 acpi_thermal_aml_dependency_fix(tz);
1029
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001030 /* Get trip points [_CRT, _PSV, etc.] (required) */
1031 result = acpi_thermal_get_trip_points(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001033 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001035 /* Get temperature [_TMP] (required) */
1036 result = acpi_thermal_get_temperature(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001038 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 /* Set the cooling mode [_SCP] to active cooling (default) */
1041 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -04001042 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044
1045 /* Get default polling frequency [_TZP] (optional) */
1046 if (tzp)
1047 tz->polling_frequency = tzp;
1048 else
1049 acpi_thermal_get_polling_frequency(tz);
1050
Patrick Mocheld550d982006-06-27 00:41:40 -04001051 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
Jean Delvare13614e32009-04-06 16:01:46 +02001054/*
1055 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1056 * handles temperature values with a single decimal place. As a consequence,
1057 * some implementations use an offset of 273.1 and others use an offset of
1058 * 273.2. Try to find out which one is being used, to present the most
1059 * accurate and visually appealing number.
1060 *
1061 * The heuristic below should work for all ACPI thermal zones which have a
1062 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1063 */
1064static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1065{
1066 if (tz->trips.critical.flags.valid &&
1067 (tz->trips.critical.temperature % 5) == 1)
1068 tz->kelvin_offset = 2731;
1069 else
1070 tz->kelvin_offset = 2732;
1071}
1072
Aaron Lua59ffb22014-03-04 14:24:46 +08001073static void acpi_thermal_check_fn(struct work_struct *work)
1074{
1075 struct acpi_thermal *tz = container_of(work, struct acpi_thermal,
1076 thermal_check_work);
1077 acpi_thermal_check(tz);
1078}
1079
Len Brown4be44fc2005-08-05 00:44:28 -04001080static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
Len Brown4be44fc2005-08-05 00:44:28 -04001082 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -04001083 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
1086 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001087 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Burman Yan36bcbec2006-12-19 12:56:11 -08001089 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001091 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001093 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 strcpy(tz->name, device->pnp.bus_id);
1095 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1096 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001097 device->driver_data = tz;
Zhang Rui3f655ef2008-01-17 15:51:11 +08001098
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 result = acpi_thermal_get_info(tz);
1100 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001101 goto free_memory;
1102
Jean Delvare13614e32009-04-06 16:01:46 +02001103 acpi_thermal_guess_offset(tz);
1104
Zhang Rui3f655ef2008-01-17 15:51:11 +08001105 result = acpi_thermal_register_thermal_zone(tz);
1106 if (result)
1107 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
Aaron Lua59ffb22014-03-04 14:24:46 +08001109 INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);
1110
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001111 pr_info(PREFIX "%s [%s] (%ld C)\n", acpi_device_name(device),
1112 acpi_device_bid(device), KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001113 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114
Zhang Rui3f655ef2008-01-17 15:51:11 +08001115free_memory:
1116 kfree(tz);
1117end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001118 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119}
1120
Rafael J. Wysocki51fac832013-01-24 00:24:48 +01001121static int acpi_thermal_remove(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122{
Len Brown4be44fc2005-08-05 00:44:28 -04001123 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001126 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Aaron Lua59ffb22014-03-04 14:24:46 +08001128 flush_workqueue(acpi_thermal_pm_queue);
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001129 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
Zhang Rui3f655ef2008-01-17 15:51:11 +08001131 acpi_thermal_unregister_thermal_zone(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001133 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134}
1135
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001136#ifdef CONFIG_PM_SLEEP
Aaron Lua59ffb22014-03-04 14:24:46 +08001137static int acpi_thermal_suspend(struct device *dev)
1138{
1139 /* Make sure the previously queued thermal check work has been done */
1140 flush_workqueue(acpi_thermal_pm_queue);
1141 return 0;
1142}
1143
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001144static int acpi_thermal_resume(struct device *dev)
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001145{
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001146 struct acpi_thermal *tz;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001147 int i, j, power_state, result;
1148
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001149 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001150 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001151
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001152 tz = acpi_driver_data(to_acpi_device(dev));
1153 if (!tz)
1154 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001155
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001156 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001157 if (!(&tz->trips.active[i]))
1158 break;
1159 if (!tz->trips.active[i].flags.valid)
1160 break;
1161 tz->trips.active[i].flags.enabled = 1;
1162 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +01001163 result = acpi_bus_update_power(
1164 tz->trips.active[i].devices.handles[j],
1165 &power_state);
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001166 if (result || (power_state != ACPI_STATE_D0)) {
1167 tz->trips.active[i].flags.enabled = 0;
1168 break;
1169 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001170 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001171 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001172 }
1173
Aaron Lua59ffb22014-03-04 14:24:46 +08001174 queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001175
1176 return AE_OK;
1177}
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001178#endif
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001179
Jeff Garzik18552562007-10-03 15:15:40 -04001180static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001181
1182 if (act == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001183 pr_notice(PREFIX "%s detected: "
1184 "disabling all active thermal trip points\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001185 act = -1;
1186 }
1187 return 0;
1188}
Jeff Garzik18552562007-10-03 15:15:40 -04001189static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001190
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001191 pr_notice(PREFIX "%s detected: "
1192 "disabling all critical thermal trip point actions.\n", d->ident);
Len Brown8c99fdc2007-08-20 18:46:50 -04001193 nocrt = 1;
1194 return 0;
1195}
Jeff Garzik18552562007-10-03 15:15:40 -04001196static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001197
1198 if (tzp == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001199 pr_notice(PREFIX "%s detected: "
1200 "enabling thermal zone polling\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001201 tzp = 300; /* 300 dS = 30 Seconds */
1202 }
1203 return 0;
1204}
Jeff Garzik18552562007-10-03 15:15:40 -04001205static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001206
1207 if (psv == 0) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001208 pr_notice(PREFIX "%s detected: "
1209 "disabling all passive thermal trip points\n", d->ident);
Len Brown0b5bfa12007-08-12 00:13:02 -04001210 psv = -1;
1211 }
1212 return 0;
1213}
1214
1215static struct dmi_system_id thermal_dmi_table[] __initdata = {
1216 /*
1217 * Award BIOS on this AOpen makes thermal control almost worthless.
1218 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1219 */
1220 {
1221 .callback = thermal_act,
1222 .ident = "AOpen i915GMm-HFS",
1223 .matches = {
1224 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1225 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1226 },
1227 },
1228 {
1229 .callback = thermal_psv,
1230 .ident = "AOpen i915GMm-HFS",
1231 .matches = {
1232 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1233 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1234 },
1235 },
1236 {
1237 .callback = thermal_tzp,
1238 .ident = "AOpen i915GMm-HFS",
1239 .matches = {
1240 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1241 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1242 },
1243 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001244 {
1245 .callback = thermal_nocrt,
1246 .ident = "Gigabyte GA-7ZX",
1247 .matches = {
1248 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1249 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1250 },
1251 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001252 {}
1253};
Len Brown0b5bfa12007-08-12 00:13:02 -04001254
Len Brown4be44fc2005-08-05 00:44:28 -04001255static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{
Len Brown4be44fc2005-08-05 00:44:28 -04001257 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Len Brown0b5bfa12007-08-12 00:13:02 -04001259 dmi_check_system(thermal_dmi_table);
1260
Len Brown72b33ef2007-08-12 00:12:17 -04001261 if (off) {
Andy Shevchenko766a8a62013-09-13 18:15:46 +03001262 pr_notice(PREFIX "thermal control disabled\n");
Len Brown72b33ef2007-08-12 00:12:17 -04001263 return -ENODEV;
1264 }
Zhang Rui43d9f872010-07-15 10:46:44 +08001265
Aaron Lua59ffb22014-03-04 14:24:46 +08001266 acpi_thermal_pm_queue = create_workqueue("acpi_thermal_pm");
1267 if (!acpi_thermal_pm_queue)
Patrick Mocheld550d982006-06-27 00:41:40 -04001268 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Aaron Lua59ffb22014-03-04 14:24:46 +08001270 result = acpi_bus_register_driver(&acpi_thermal_driver);
1271 if (result < 0) {
1272 destroy_workqueue(acpi_thermal_pm_queue);
1273 return -ENODEV;
1274 }
1275
Patrick Mocheld550d982006-06-27 00:41:40 -04001276 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277}
1278
Len Brown4be44fc2005-08-05 00:44:28 -04001279static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 acpi_bus_unregister_driver(&acpi_thermal_driver);
Aaron Lu2807bd12014-05-26 14:34:07 +02001282 destroy_workqueue(acpi_thermal_pm_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283
Patrick Mocheld550d982006-06-27 00:41:40 -04001284 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287module_init(acpi_thermal_init);
1288module_exit(acpi_thermal_exit);