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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>
38#include <linux/types.h>
39#include <linux/proc_fs.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>
42#include <linux/seq_file.h>
Jeremy Fitzhardinge10a0a8d2007-07-17 18:37:02 -070043#include <linux/reboot.h>
Stephen Rothwellf6f5c452009-03-03 12:47:17 +110044#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/uaccess.h>
Zhang Rui3f655ef2008-01-17 15:51:11 +080046#include <linux/thermal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <acpi/acpi_bus.h>
48#include <acpi/acpi_drivers.h>
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define ACPI_THERMAL_CLASS "thermal_zone"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
52#define ACPI_THERMAL_FILE_STATE "state"
53#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
54#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
55#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
56#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
57#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
58#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
59#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
60#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
61#define ACPI_THERMAL_NOTIFY_HOT 0xF1
62#define ACPI_THERMAL_MODE_ACTIVE 0x00
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64#define ACPI_THERMAL_MAX_ACTIVE 10
65#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#define _COMPONENT ACPI_THERMAL_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050068ACPI_MODULE_NAME("thermal");
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Thomas Renninger1cbf4c52004-09-16 11:07:00 -040070MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050071MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070072MODULE_LICENSE("GPL");
73
Len Brownf8707ec2007-08-12 00:12:54 -040074static int act;
75module_param(act, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040076MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
Len Brownf8707ec2007-08-12 00:12:54 -040077
Len Brownc52a7412007-08-14 15:49:32 -040078static int crt;
79module_param(crt, int, 0644);
80MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082static int tzp;
Len Brown730ff342007-08-12 00:12:26 -040083module_param(tzp, int, 0444);
Len Brown3c1d36d2007-08-14 15:12:56 -040084MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Len Brownf5487142007-08-12 00:12:44 -040086static int nocrt;
87module_param(nocrt, int, 0);
Len Brown8c99fdc2007-08-20 18:46:50 -040088MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
Len Brownf5487142007-08-12 00:12:44 -040089
Len Brown72b33ef2007-08-12 00:12:17 -040090static int off;
91module_param(off, int, 0);
Len Brown3c1d36d2007-08-14 15:12:56 -040092MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
Len Brown72b33ef2007-08-12 00:12:17 -040093
Len Browna70cdc52007-08-12 00:12:35 -040094static int psv;
95module_param(psv, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040096MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
Len Browna70cdc52007-08-12 00:12:35 -040097
Len Brown4be44fc2005-08-05 00:44:28 -040098static int acpi_thermal_add(struct acpi_device *device);
99static int acpi_thermal_remove(struct acpi_device *device, int type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800100static int acpi_thermal_resume(struct acpi_device *device);
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000101static void acpi_thermal_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
103static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
104static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
Len Brown4be44fc2005-08-05 00:44:28 -0400106static ssize_t acpi_thermal_write_cooling_mode(struct file *,
107 const char __user *, size_t,
108 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
Len Brown4be44fc2005-08-05 00:44:28 -0400110static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
111 size_t, loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200113static const struct acpi_device_id thermal_device_ids[] = {
114 {ACPI_THERMAL_HID, 0},
115 {"", 0},
116};
117MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119static struct acpi_driver acpi_thermal_driver = {
Len Brownc2b6705b2007-02-12 23:33:40 -0500120 .name = "thermal",
Len Brown4be44fc2005-08-05 00:44:28 -0400121 .class = ACPI_THERMAL_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200122 .ids = thermal_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -0400123 .ops = {
124 .add = acpi_thermal_add,
125 .remove = acpi_thermal_remove,
Konstantin Karasyov74ce1462006-05-08 08:32:00 -0400126 .resume = acpi_thermal_resume,
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000127 .notify = acpi_thermal_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400128 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129};
130
131struct acpi_thermal_state {
Len Brown4be44fc2005-08-05 00:44:28 -0400132 u8 critical:1;
133 u8 hot:1;
134 u8 passive:1;
135 u8 active:1;
136 u8 reserved:4;
137 int active_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138};
139
140struct acpi_thermal_state_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400141 u8 valid:1;
142 u8 enabled:1;
143 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144};
145
146struct acpi_thermal_critical {
147 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400148 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
151struct acpi_thermal_hot {
152 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400153 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154};
155
156struct acpi_thermal_passive {
157 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400158 unsigned long temperature;
159 unsigned long tc1;
160 unsigned long tc2;
161 unsigned long tsp;
162 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163};
164
165struct acpi_thermal_active {
166 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400167 unsigned long temperature;
168 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169};
170
171struct acpi_thermal_trips {
172 struct acpi_thermal_critical critical;
Len Brown4be44fc2005-08-05 00:44:28 -0400173 struct acpi_thermal_hot hot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 struct acpi_thermal_passive passive;
175 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
176};
177
178struct acpi_thermal_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400179 u8 cooling_mode:1; /* _SCP */
180 u8 devices:1; /* _TZD */
181 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182};
183
184struct acpi_thermal {
Patrick Mochel8348e1b2006-05-19 16:54:40 -0400185 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -0400186 acpi_bus_id name;
187 unsigned long temperature;
188 unsigned long last_temperature;
189 unsigned long polling_frequency;
Len Brown4be44fc2005-08-05 00:44:28 -0400190 volatile u8 zombie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 struct acpi_thermal_flags flags;
192 struct acpi_thermal_state state;
193 struct acpi_thermal_trips trips;
Len Brown4be44fc2005-08-05 00:44:28 -0400194 struct acpi_handle_list devices;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800195 struct thermal_zone_device *thermal_zone;
196 int tz_enabled;
Jean Delvare13614e32009-04-06 16:01:46 +0200197 int kelvin_offset;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +0400198 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199};
200
Arjan van de Vend7508032006-07-04 13:06:00 -0400201static const struct file_operations acpi_thermal_state_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700202 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400203 .open = acpi_thermal_state_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207};
208
Arjan van de Vend7508032006-07-04 13:06:00 -0400209static const struct file_operations acpi_thermal_temp_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700210 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400211 .open = acpi_thermal_temp_open_fs,
212 .read = seq_read,
213 .llseek = seq_lseek,
214 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215};
216
Arjan van de Vend7508032006-07-04 13:06:00 -0400217static const struct file_operations acpi_thermal_trip_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700218 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400219 .open = acpi_thermal_trip_open_fs,
220 .read = seq_read,
Len Brown4be44fc2005-08-05 00:44:28 -0400221 .llseek = seq_lseek,
222 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223};
224
Arjan van de Vend7508032006-07-04 13:06:00 -0400225static const struct file_operations acpi_thermal_cooling_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700226 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400227 .open = acpi_thermal_cooling_open_fs,
228 .read = seq_read,
229 .write = acpi_thermal_write_cooling_mode,
230 .llseek = seq_lseek,
231 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232};
233
Arjan van de Vend7508032006-07-04 13:06:00 -0400234static const struct file_operations acpi_thermal_polling_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700235 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400236 .open = acpi_thermal_polling_open_fs,
237 .read = seq_read,
238 .write = acpi_thermal_write_polling,
239 .llseek = seq_lseek,
240 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241};
242
243/* --------------------------------------------------------------------------
244 Thermal Zone Management
245 -------------------------------------------------------------------------- */
246
Len Brown4be44fc2005-08-05 00:44:28 -0400247static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248{
Len Brown4be44fc2005-08-05 00:44:28 -0400249 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400250 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400253 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255 tz->last_temperature = tz->temperature;
256
Matthew Wilcox27663c52008-10-10 02:22:59 -0400257 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400259 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Matthew Wilcox27663c52008-10-10 02:22:59 -0400261 tz->temperature = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400262 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
263 tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Patrick Mocheld550d982006-06-27 00:41:40 -0400265 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266}
267
Len Brown4be44fc2005-08-05 00:44:28 -0400268static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Len Brown4be44fc2005-08-05 00:44:28 -0400270 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400271 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400274 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Matthew Wilcox27663c52008-10-10 02:22:59 -0400276 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400278 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Matthew Wilcox27663c52008-10-10 02:22:59 -0400280 tz->polling_frequency = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400281 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
282 tz->polling_frequency));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Patrick Mocheld550d982006-06-27 00:41:40 -0400284 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
Len Brown4be44fc2005-08-05 00:44:28 -0400287static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400291 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
294
Matthew Garrettb1569e92008-12-03 17:55:32 +0000295 tz->thermal_zone->polling_delay = seconds * 1000;
296
297 if (tz->tz_enabled)
298 thermal_zone_device_update(tz->thermal_zone);
299
Len Brown4be44fc2005-08-05 00:44:28 -0400300 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
301 "Polling frequency set to %lu seconds\n",
Sanjoy Mahajan636cedf2007-02-16 01:24:43 -0500302 tz->polling_frequency/10));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Patrick Mocheld550d982006-06-27 00:41:40 -0400304 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
Len Brown4be44fc2005-08-05 00:44:28 -0400307static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Len Brown4be44fc2005-08-05 00:44:28 -0400309 acpi_status status = AE_OK;
310 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
311 struct acpi_object_list arg_list = { 1, &arg0 };
312 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400316 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
Patrick Mochel38ba7c92006-05-19 16:54:48 -0400318 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 if (ACPI_FAILURE(status)) {
320 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400321 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 }
323
324 arg0.integer.value = mode;
325
326 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
327 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400328 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Patrick Mocheld550d982006-06-27 00:41:40 -0400330 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331}
332
Zhang Ruice44e192008-01-17 15:51:25 +0800333#define ACPI_TRIPS_CRITICAL 0x01
334#define ACPI_TRIPS_HOT 0x02
335#define ACPI_TRIPS_PASSIVE 0x04
336#define ACPI_TRIPS_ACTIVE 0x08
337#define ACPI_TRIPS_DEVICES 0x10
338
339#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
340#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
341
342#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
343 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
344 ACPI_TRIPS_DEVICES)
345
346/*
347 * This exception is thrown out in two cases:
348 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
349 * when re-evaluating the AML code.
350 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
351 * We need to re-bind the cooling devices of a thermal zone when this occurs.
352 */
353#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
354do { \
355 if (flags != ACPI_TRIPS_INIT) \
356 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
357 "ACPI thermal trip point %s changed\n" \
358 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
359} while (0)
360
361static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
Len Brown4be44fc2005-08-05 00:44:28 -0400363 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400364 unsigned long long tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800365 struct acpi_handle_list devices;
366 int valid = 0;
367 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369 /* Critical Shutdown (required) */
Zhang Ruice44e192008-01-17 15:51:25 +0800370 if (flag & ACPI_TRIPS_CRITICAL) {
371 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400372 "_CRT", NULL, &tmp);
373 tz->trips.critical.temperature = tmp;
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700374 /*
375 * Treat freezing temperatures as invalid as well; some
376 * BIOSes return really low values and cause reboots at startup.
Adam Buchbinderb731d7b2009-03-13 12:15:26 -0400377 * Below zero (Celsius) values clearly aren't right for sure..
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700378 * ... so lets discard those as invalid.
379 */
380 if (ACPI_FAILURE(status) ||
381 tz->trips.critical.temperature <= 2732) {
Len Brownc52a7412007-08-14 15:49:32 -0400382 tz->trips.critical.flags.valid = 0;
Zhang Ruice44e192008-01-17 15:51:25 +0800383 ACPI_EXCEPTION((AE_INFO, status,
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700384 "No or invalid critical threshold"));
Zhang Ruice44e192008-01-17 15:51:25 +0800385 return -ENODEV;
386 } else {
387 tz->trips.critical.flags.valid = 1;
388 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
389 "Found critical threshold [%lu]\n",
390 tz->trips.critical.temperature));
391 }
392 if (tz->trips.critical.flags.valid == 1) {
393 if (crt == -1) {
394 tz->trips.critical.flags.valid = 0;
395 } else if (crt > 0) {
396 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
397 /*
Zhang Rui22a94d72008-10-17 02:41:20 -0400398 * Allow override critical threshold
Zhang Ruice44e192008-01-17 15:51:25 +0800399 */
Zhang Rui22a94d72008-10-17 02:41:20 -0400400 if (crt_k > tz->trips.critical.temperature)
401 printk(KERN_WARNING PREFIX
402 "Critical threshold %d C\n", crt);
403 tz->trips.critical.temperature = crt_k;
Zhang Ruice44e192008-01-17 15:51:25 +0800404 }
Len Brownc52a7412007-08-14 15:49:32 -0400405 }
406 }
407
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 /* Critical Sleep (optional) */
Zhang Ruice44e192008-01-17 15:51:25 +0800409 if (flag & ACPI_TRIPS_HOT) {
Len Browna70cdc52007-08-12 00:12:35 -0400410 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400411 "_HOT", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800412 if (ACPI_FAILURE(status)) {
413 tz->trips.hot.flags.valid = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400414 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Ruice44e192008-01-17 15:51:25 +0800415 "No hot threshold\n"));
416 } else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400417 tz->trips.hot.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800418 tz->trips.hot.flags.valid = 1;
419 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
420 "Found hot threshold [%lu]\n",
421 tz->trips.critical.temperature));
422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424
Zhang Ruice44e192008-01-17 15:51:25 +0800425 /* Passive (optional) */
Zhang Rui0e4240d2009-01-16 12:53:42 -0500426 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
427 (flag == ACPI_TRIPS_INIT)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800428 valid = tz->trips.passive.flags.valid;
429 if (psv == -1) {
430 status = AE_SUPPORT;
431 } else if (psv > 0) {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400432 tmp = CELSIUS_TO_KELVIN(psv);
Zhang Ruice44e192008-01-17 15:51:25 +0800433 status = AE_OK;
434 } else {
435 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400436 "_PSV", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800437 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Zhang Ruice44e192008-01-17 15:51:25 +0800439 if (ACPI_FAILURE(status))
440 tz->trips.passive.flags.valid = 0;
441 else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400442 tz->trips.passive.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800443 tz->trips.passive.flags.valid = 1;
444 if (flag == ACPI_TRIPS_INIT) {
445 status = acpi_evaluate_integer(
446 tz->device->handle, "_TC1",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400447 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800448 if (ACPI_FAILURE(status))
449 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400450 else
451 tz->trips.passive.tc1 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800452 status = acpi_evaluate_integer(
453 tz->device->handle, "_TC2",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400454 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800455 if (ACPI_FAILURE(status))
456 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400457 else
458 tz->trips.passive.tc2 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800459 status = acpi_evaluate_integer(
460 tz->device->handle, "_TSP",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400461 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800462 if (ACPI_FAILURE(status))
463 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400464 else
465 tz->trips.passive.tsp = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800466 }
467 }
468 }
469 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
470 memset(&devices, 0, sizeof(struct acpi_handle_list));
471 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
472 NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500473 if (ACPI_FAILURE(status)) {
474 printk(KERN_WARNING PREFIX
475 "Invalid passive threshold\n");
Zhang Ruice44e192008-01-17 15:51:25 +0800476 tz->trips.passive.flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500477 }
Zhang Ruice44e192008-01-17 15:51:25 +0800478 else
479 tz->trips.passive.flags.valid = 1;
480
481 if (memcmp(&tz->trips.passive.devices, &devices,
482 sizeof(struct acpi_handle_list))) {
483 memcpy(&tz->trips.passive.devices, &devices,
484 sizeof(struct acpi_handle_list));
485 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
486 }
487 }
488 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
489 if (valid != tz->trips.passive.flags.valid)
490 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
491 }
492
493 /* Active (optional) */
Len Brown4be44fc2005-08-05 00:44:28 -0400494 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400495 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
Zhang Ruice44e192008-01-17 15:51:25 +0800496 valid = tz->trips.active[i].flags.valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Len Brownf8707ec2007-08-12 00:12:54 -0400498 if (act == -1)
Zhang Ruice44e192008-01-17 15:51:25 +0800499 break; /* disable all active trip points */
Len Brownf8707ec2007-08-12 00:12:54 -0400500
Zhang Rui0e4240d2009-01-16 12:53:42 -0500501 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
502 tz->trips.active[i].flags.valid)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800503 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400504 name, NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800505 if (ACPI_FAILURE(status)) {
506 tz->trips.active[i].flags.valid = 0;
507 if (i == 0)
508 break;
509 if (act <= 0)
510 break;
511 if (i == 1)
512 tz->trips.active[0].temperature =
513 CELSIUS_TO_KELVIN(act);
514 else
515 /*
516 * Don't allow override higher than
517 * the next higher trip point
518 */
519 tz->trips.active[i - 1].temperature =
520 (tz->trips.active[i - 2].temperature <
521 CELSIUS_TO_KELVIN(act) ?
522 tz->trips.active[i - 2].temperature :
523 CELSIUS_TO_KELVIN(act));
Len Brownf8707ec2007-08-12 00:12:54 -0400524 break;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400525 } else {
526 tz->trips.active[i].temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800527 tz->trips.active[i].flags.valid = 1;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400528 }
Len Brownf8707ec2007-08-12 00:12:54 -0400529 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
531 name[2] = 'L';
Zhang Ruice44e192008-01-17 15:51:25 +0800532 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
533 memset(&devices, 0, sizeof(struct acpi_handle_list));
534 status = acpi_evaluate_reference(tz->device->handle,
535 name, NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500536 if (ACPI_FAILURE(status)) {
537 printk(KERN_WARNING PREFIX
538 "Invalid active%d threshold\n", i);
Zhang Ruice44e192008-01-17 15:51:25 +0800539 tz->trips.active[i].flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500540 }
Zhang Ruice44e192008-01-17 15:51:25 +0800541 else
542 tz->trips.active[i].flags.valid = 1;
543
544 if (memcmp(&tz->trips.active[i].devices, &devices,
545 sizeof(struct acpi_handle_list))) {
546 memcpy(&tz->trips.active[i].devices, &devices,
547 sizeof(struct acpi_handle_list));
548 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
549 }
550 }
551 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
552 if (valid != tz->trips.active[i].flags.valid)
553 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
554
555 if (!tz->trips.active[i].flags.valid)
556 break;
557 }
558
559 if (flag & ACPI_TRIPS_DEVICES) {
560 memset(&devices, 0, sizeof(struct acpi_handle_list));
561 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
562 NULL, &devices);
563 if (memcmp(&tz->devices, &devices,
564 sizeof(struct acpi_handle_list))) {
565 memcpy(&tz->devices, &devices,
566 sizeof(struct acpi_handle_list));
567 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
568 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 }
570
Patrick Mocheld550d982006-06-27 00:41:40 -0400571 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572}
573
Zhang Ruice44e192008-01-17 15:51:25 +0800574static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
Zhang Ruice44e192008-01-17 15:51:25 +0800576 return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577}
578
Len Brown4be44fc2005-08-05 00:44:28 -0400579static void acpi_thermal_check(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200581 struct acpi_thermal *tz = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Matthew Garrettb1569e92008-12-03 17:55:32 +0000583 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
585
Zhang Rui3f655ef2008-01-17 15:51:11 +0800586/* sys I/F for generic thermal sysfs support */
Jean Delvare13614e32009-04-06 16:01:46 +0200587#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
Zhang, Rui5e012762008-02-28 07:51:30 +0800588
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000589static int thermal_get_temp(struct thermal_zone_device *thermal,
590 unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800591{
592 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800593 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800594
595 if (!tz)
596 return -EINVAL;
597
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800598 result = acpi_thermal_get_temperature(tz);
599 if (result)
600 return result;
601
Jean Delvare13614e32009-04-06 16:01:46 +0200602 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000603 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800604}
605
606static const char enabled[] = "kernel";
607static const char disabled[] = "user";
608static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000609 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800610{
611 struct acpi_thermal *tz = thermal->devdata;
612
613 if (!tz)
614 return -EINVAL;
615
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000616 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
617 THERMAL_DEVICE_DISABLED;
618
619 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800620}
621
622static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000623 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800624{
625 struct acpi_thermal *tz = thermal->devdata;
626 int enable;
627
628 if (!tz)
629 return -EINVAL;
630
631 /*
632 * enable/disable thermal management from ACPI thermal driver
633 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000634 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800635 enable = 1;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000636 else if (mode == THERMAL_DEVICE_DISABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800637 enable = 0;
638 else
639 return -EINVAL;
640
641 if (enable != tz->tz_enabled) {
642 tz->tz_enabled = enable;
643 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
644 "%s ACPI thermal control\n",
645 tz->tz_enabled ? enabled : disabled));
646 acpi_thermal_check(tz);
647 }
648 return 0;
649}
650
651static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000652 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800653{
654 struct acpi_thermal *tz = thermal->devdata;
655 int i;
656
657 if (!tz || trip < 0)
658 return -EINVAL;
659
660 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000661 if (!trip) {
662 *type = THERMAL_TRIP_CRITICAL;
663 return 0;
664 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800665 trip--;
666 }
667
668 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000669 if (!trip) {
670 *type = THERMAL_TRIP_HOT;
671 return 0;
672 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800673 trip--;
674 }
675
676 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000677 if (!trip) {
678 *type = THERMAL_TRIP_PASSIVE;
679 return 0;
680 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800681 trip--;
682 }
683
684 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
685 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000686 if (!trip) {
687 *type = THERMAL_TRIP_ACTIVE;
688 return 0;
689 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800690 trip--;
691 }
692
693 return -EINVAL;
694}
695
696static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000697 int trip, unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800698{
699 struct acpi_thermal *tz = thermal->devdata;
700 int i;
701
702 if (!tz || trip < 0)
703 return -EINVAL;
704
705 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000706 if (!trip) {
707 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200708 tz->trips.critical.temperature,
709 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000710 return 0;
711 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800712 trip--;
713 }
714
715 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000716 if (!trip) {
717 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200718 tz->trips.hot.temperature,
719 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000720 return 0;
721 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800722 trip--;
723 }
724
725 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000726 if (!trip) {
727 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200728 tz->trips.passive.temperature,
729 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000730 return 0;
731 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800732 trip--;
733 }
734
735 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
736 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000737 if (!trip) {
738 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200739 tz->trips.active[i].temperature,
740 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000741 return 0;
742 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800743 trip--;
744 }
745
746 return -EINVAL;
747}
748
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800749static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
750 unsigned long *temperature) {
751 struct acpi_thermal *tz = thermal->devdata;
752
753 if (tz->trips.critical.flags.valid) {
754 *temperature = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200755 tz->trips.critical.temperature,
756 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800757 return 0;
758 } else
759 return -EINVAL;
760}
761
Matthew Garrettb1569e92008-12-03 17:55:32 +0000762static int thermal_notify(struct thermal_zone_device *thermal, int trip,
763 enum thermal_trip_type trip_type)
764{
765 u8 type = 0;
766 struct acpi_thermal *tz = thermal->devdata;
767
768 if (trip_type == THERMAL_TRIP_CRITICAL)
769 type = ACPI_THERMAL_NOTIFY_CRITICAL;
770 else if (trip_type == THERMAL_TRIP_HOT)
771 type = ACPI_THERMAL_NOTIFY_HOT;
772 else
773 return 0;
774
775 acpi_bus_generate_proc_event(tz->device, type, 1);
776 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100777 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000778
779 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
780 return 1;
781
782 return 0;
783}
784
Zhang Rui3f655ef2008-01-17 15:51:11 +0800785typedef int (*cb)(struct thermal_zone_device *, int,
786 struct thermal_cooling_device *);
787static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
788 struct thermal_cooling_device *cdev,
789 cb action)
790{
791 struct acpi_device *device = cdev->devdata;
792 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800793 struct acpi_device *dev;
794 acpi_status status;
795 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800796 int i;
797 int j;
798 int trip = -1;
799 int result = 0;
800
801 if (tz->trips.critical.flags.valid)
802 trip++;
803
804 if (tz->trips.hot.flags.valid)
805 trip++;
806
807 if (tz->trips.passive.flags.valid) {
808 trip++;
809 for (i = 0; i < tz->trips.passive.devices.count;
810 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800811 handle = tz->trips.passive.devices.handles[i];
812 status = acpi_bus_get_device(handle, &dev);
813 if (ACPI_SUCCESS(status) && (dev == device)) {
814 result = action(thermal, trip, cdev);
815 if (result)
816 goto failed;
817 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800818 }
819 }
820
821 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
822 if (!tz->trips.active[i].flags.valid)
823 break;
824 trip++;
825 for (j = 0;
826 j < tz->trips.active[i].devices.count;
827 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800828 handle = tz->trips.active[i].devices.handles[j];
829 status = acpi_bus_get_device(handle, &dev);
830 if (ACPI_SUCCESS(status) && (dev == device)) {
831 result = action(thermal, trip, cdev);
832 if (result)
833 goto failed;
834 }
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)) {
842 result = action(thermal, -1, cdev);
843 if (result)
844 goto failed;
845 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800846 }
847
848failed:
849 return result;
850}
851
852static int
853acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
854 struct thermal_cooling_device *cdev)
855{
856 return acpi_thermal_cooling_device_cb(thermal, cdev,
857 thermal_zone_bind_cooling_device);
858}
859
860static int
861acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
862 struct thermal_cooling_device *cdev)
863{
864 return acpi_thermal_cooling_device_cb(thermal, cdev,
865 thermal_zone_unbind_cooling_device);
866}
867
868static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
869 .bind = acpi_thermal_bind_cooling_device,
870 .unbind = acpi_thermal_unbind_cooling_device,
871 .get_temp = thermal_get_temp,
872 .get_mode = thermal_get_mode,
873 .set_mode = thermal_set_mode,
874 .get_trip_type = thermal_get_trip_type,
875 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800876 .get_crit_temp = thermal_get_crit_temp,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000877 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800878};
879
880static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
881{
882 int trips = 0;
883 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800884 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800885 int i;
886
887 if (tz->trips.critical.flags.valid)
888 trips++;
889
890 if (tz->trips.hot.flags.valid)
891 trips++;
892
893 if (tz->trips.passive.flags.valid)
894 trips++;
895
896 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
897 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000898
899 if (tz->trips.passive.flags.valid)
900 tz->thermal_zone =
901 thermal_zone_device_register("acpitz", trips, tz,
902 &acpi_thermal_zone_ops,
903 tz->trips.passive.tc1,
904 tz->trips.passive.tc2,
905 tz->trips.passive.tsp*100,
906 tz->polling_frequency*100);
907 else
908 tz->thermal_zone =
909 thermal_zone_device_register("acpitz", trips, tz,
910 &acpi_thermal_zone_ops,
911 0, 0, 0,
Matthew Garrett67405432009-04-14 20:16:45 +0100912 tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700913 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800914 return -ENODEV;
915
916 result = sysfs_create_link(&tz->device->dev.kobj,
917 &tz->thermal_zone->device.kobj, "thermal_zone");
918 if (result)
919 return result;
920
921 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
922 &tz->device->dev.kobj, "device");
923 if (result)
924 return result;
925
Zhang Rui20733932008-01-17 15:51:21 +0800926 status = acpi_attach_data(tz->device->handle,
927 acpi_bus_private_data_handler,
928 tz->thermal_zone);
929 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800930 printk(KERN_ERR PREFIX
931 "Error attaching device data\n");
Zhang Rui20733932008-01-17 15:51:21 +0800932 return -ENODEV;
933 }
934
Zhang Rui3f655ef2008-01-17 15:51:11 +0800935 tz->tz_enabled = 1;
936
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200937 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
938 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800939 return 0;
940}
941
942static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
943{
944 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
945 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
946 thermal_zone_device_unregister(tz->thermal_zone);
947 tz->thermal_zone = NULL;
Zhang Rui20733932008-01-17 15:51:21 +0800948 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800949}
950
951
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952/* --------------------------------------------------------------------------
953 FS Interface (/proc)
954 -------------------------------------------------------------------------- */
955
Len Brown4be44fc2005-08-05 00:44:28 -0400956static struct proc_dir_entry *acpi_thermal_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
958static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
959{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200960 struct acpi_thermal *tz = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963 if (!tz)
964 goto end;
965
966 seq_puts(seq, "state: ");
967
Len Brown4be44fc2005-08-05 00:44:28 -0400968 if (!tz->state.critical && !tz->state.hot && !tz->state.passive
969 && !tz->state.active)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 seq_puts(seq, "ok\n");
971 else {
972 if (tz->state.critical)
973 seq_puts(seq, "critical ");
974 if (tz->state.hot)
975 seq_puts(seq, "hot ");
976 if (tz->state.passive)
977 seq_puts(seq, "passive ");
978 if (tz->state.active)
979 seq_printf(seq, "active[%d]", tz->state.active_index);
980 seq_puts(seq, "\n");
981 }
982
Len Brown4be44fc2005-08-05 00:44:28 -0400983 end:
Patrick Mocheld550d982006-06-27 00:41:40 -0400984 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985}
986
987static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
988{
989 return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
990}
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
993{
Len Brown4be44fc2005-08-05 00:44:28 -0400994 int result = 0;
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200995 struct acpi_thermal *tz = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997
998 if (!tz)
999 goto end;
1000
1001 result = acpi_thermal_get_temperature(tz);
1002 if (result)
1003 goto end;
1004
Len Brown4be44fc2005-08-05 00:44:28 -04001005 seq_printf(seq, "temperature: %ld C\n",
1006 KELVIN_TO_CELSIUS(tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Len Brown4be44fc2005-08-05 00:44:28 -04001008 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001009 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010}
1011
1012static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
1013{
1014 return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
1015}
1016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
1018{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001019 struct acpi_thermal *tz = seq->private;
Thomas Renninger68ccfaa2006-11-19 23:01:40 +01001020 struct acpi_device *device;
Thomas Renningere7c746e2007-06-18 00:40:51 -04001021 acpi_status status;
1022
Len Brown4be44fc2005-08-05 00:44:28 -04001023 int i = 0;
1024 int j = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
1027 if (!tz)
1028 goto end;
1029
1030 if (tz->trips.critical.flags.valid)
Len Brownf5487142007-08-12 00:12:44 -04001031 seq_printf(seq, "critical (S5): %ld C%s",
1032 KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
1033 nocrt ? " <disabled>\n" : "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
1035 if (tz->trips.hot.flags.valid)
Len Brownf5487142007-08-12 00:12:44 -04001036 seq_printf(seq, "hot (S4): %ld C%s",
1037 KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
1038 nocrt ? " <disabled>\n" : "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 if (tz->trips.passive.flags.valid) {
Len Brown4be44fc2005-08-05 00:44:28 -04001041 seq_printf(seq,
1042 "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
1043 KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
1044 tz->trips.passive.tc1, tz->trips.passive.tc2,
1045 tz->trips.passive.tsp);
1046 for (j = 0; j < tz->trips.passive.devices.count; j++) {
Thomas Renningere7c746e2007-06-18 00:40:51 -04001047 status = acpi_bus_get_device(tz->trips.passive.devices.
1048 handles[j], &device);
1049 seq_printf(seq, "%4.4s ", status ? "" :
1050 acpi_device_bid(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 }
1052 seq_puts(seq, "\n");
1053 }
1054
1055 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1056 if (!(tz->trips.active[i].flags.valid))
1057 break;
1058 seq_printf(seq, "active[%d]: %ld C: devices=",
Len Brown4be44fc2005-08-05 00:44:28 -04001059 i,
1060 KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
Thomas Renninger68ccfaa2006-11-19 23:01:40 +01001061 for (j = 0; j < tz->trips.active[i].devices.count; j++){
Thomas Renningere7c746e2007-06-18 00:40:51 -04001062 status = acpi_bus_get_device(tz->trips.active[i].
1063 devices.handles[j],
1064 &device);
1065 seq_printf(seq, "%4.4s ", status ? "" :
1066 acpi_device_bid(device));
Thomas Renninger68ccfaa2006-11-19 23:01:40 +01001067 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 seq_puts(seq, "\n");
1069 }
1070
Len Brown4be44fc2005-08-05 00:44:28 -04001071 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001072 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073}
1074
1075static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
1076{
1077 return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
1078}
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
1081{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001082 struct acpi_thermal *tz = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
1085 if (!tz)
1086 goto end;
1087
Len Browneaca2d32007-04-30 23:27:43 -04001088 if (!tz->flags.cooling_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 seq_puts(seq, "<setting not supported>\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 else
Len Browneaca2d32007-04-30 23:27:43 -04001091 seq_puts(seq, "0 - Active; 1 - Passive\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
Len Brown4be44fc2005-08-05 00:44:28 -04001093 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001094 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095}
1096
1097static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
1098{
1099 return single_open(file, acpi_thermal_cooling_seq_show,
Len Brown4be44fc2005-08-05 00:44:28 -04001100 PDE(inode)->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101}
1102
1103static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001104acpi_thermal_write_cooling_mode(struct file *file,
1105 const char __user * buffer,
1106 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001108 struct seq_file *m = file->private_data;
1109 struct acpi_thermal *tz = m->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001110 int result = 0;
1111 char mode_string[12] = { '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114 if (!tz || (count > sizeof(mode_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -04001115 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117 if (!tz->flags.cooling_mode)
Patrick Mocheld550d982006-06-27 00:41:40 -04001118 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119
1120 if (copy_from_user(mode_string, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001121 return -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -04001122
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 mode_string[count] = '\0';
Len Brown4be44fc2005-08-05 00:44:28 -04001124
1125 result = acpi_thermal_set_cooling_mode(tz,
1126 simple_strtoul(mode_string, NULL,
1127 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001129 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
1131 acpi_thermal_check(tz);
1132
Patrick Mocheld550d982006-06-27 00:41:40 -04001133 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134}
1135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
1137{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001138 struct acpi_thermal *tz = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
1141 if (!tz)
1142 goto end;
1143
Matthew Garrettb1569e92008-12-03 17:55:32 +00001144 if (!tz->thermal_zone->polling_delay) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 seq_puts(seq, "<polling disabled>\n");
1146 goto end;
1147 }
1148
Matthew Garrettb1569e92008-12-03 17:55:32 +00001149 seq_printf(seq, "polling frequency: %d seconds\n",
1150 (tz->thermal_zone->polling_delay / 1000));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
Len Brown4be44fc2005-08-05 00:44:28 -04001152 end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001153 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154}
1155
1156static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
1157{
1158 return single_open(file, acpi_thermal_polling_seq_show,
Len Brown4be44fc2005-08-05 00:44:28 -04001159 PDE(inode)->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160}
1161
1162static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -04001163acpi_thermal_write_polling(struct file *file,
1164 const char __user * buffer,
1165 size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001167 struct seq_file *m = file->private_data;
1168 struct acpi_thermal *tz = m->private;
Len Brown4be44fc2005-08-05 00:44:28 -04001169 int result = 0;
1170 char polling_string[12] = { '\0' };
1171 int seconds = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
1174 if (!tz || (count > sizeof(polling_string) - 1))
Patrick Mocheld550d982006-06-27 00:41:40 -04001175 return -EINVAL;
Len Brown4be44fc2005-08-05 00:44:28 -04001176
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 if (copy_from_user(polling_string, buffer, count))
Patrick Mocheld550d982006-06-27 00:41:40 -04001178 return -EFAULT;
Len Brown4be44fc2005-08-05 00:44:28 -04001179
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 polling_string[count] = '\0';
1181
1182 seconds = simple_strtoul(polling_string, NULL, 0);
Len Brown4be44fc2005-08-05 00:44:28 -04001183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 result = acpi_thermal_set_polling(tz, seconds);
1185 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001186 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
1188 acpi_thermal_check(tz);
1189
Patrick Mocheld550d982006-06-27 00:41:40 -04001190 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191}
1192
Len Brown4be44fc2005-08-05 00:44:28 -04001193static int acpi_thermal_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194{
Len Brown4be44fc2005-08-05 00:44:28 -04001195 struct proc_dir_entry *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
1198 if (!acpi_device_dir(device)) {
1199 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -04001200 acpi_thermal_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001202 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
1204
1205 /* 'state' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001206 entry = proc_create_data(ACPI_THERMAL_FILE_STATE,
1207 S_IRUGO, acpi_device_dir(device),
1208 &acpi_thermal_state_fops,
1209 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -04001211 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
1213 /* 'temperature' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001214 entry = proc_create_data(ACPI_THERMAL_FILE_TEMPERATURE,
1215 S_IRUGO, acpi_device_dir(device),
1216 &acpi_thermal_temp_fops,
1217 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -04001219 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220
Pavel Machek2db9ccb2007-08-24 11:45:50 +02001221 /* 'trip_points' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001222 entry = proc_create_data(ACPI_THERMAL_FILE_TRIP_POINTS,
1223 S_IRUGO,
1224 acpi_device_dir(device),
1225 &acpi_thermal_trip_fops,
1226 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -04001228 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
1230 /* 'cooling_mode' [R/W] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001231 entry = proc_create_data(ACPI_THERMAL_FILE_COOLING_MODE,
1232 S_IFREG | S_IRUGO | S_IWUSR,
1233 acpi_device_dir(device),
1234 &acpi_thermal_cooling_fops,
1235 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -04001237 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
1239 /* 'polling_frequency' [R/W] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -07001240 entry = proc_create_data(ACPI_THERMAL_FILE_POLLING_FREQ,
1241 S_IFREG | S_IRUGO | S_IWUSR,
1242 acpi_device_dir(device),
1243 &acpi_thermal_polling_fops,
1244 acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -04001246 return -ENODEV;
Patrick Mocheld550d982006-06-27 00:41:40 -04001247 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Len Brown4be44fc2005-08-05 00:44:28 -04001250static int acpi_thermal_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
1253 if (acpi_device_dir(device)) {
1254 remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
1255 acpi_device_dir(device));
1256 remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
1257 acpi_device_dir(device));
1258 remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
1259 acpi_device_dir(device));
1260 remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
1261 acpi_device_dir(device));
1262 remove_proc_entry(ACPI_THERMAL_FILE_STATE,
1263 acpi_device_dir(device));
1264 remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
1265 acpi_device_dir(device) = NULL;
1266 }
1267
Patrick Mocheld550d982006-06-27 00:41:40 -04001268 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269}
1270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271/* --------------------------------------------------------------------------
1272 Driver Interface
1273 -------------------------------------------------------------------------- */
1274
Bjorn Helgaas342d5502009-04-07 15:37:06 +00001275static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
Bjorn Helgaas342d5502009-04-07 15:37:06 +00001277 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279
1280 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001281 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 switch (event) {
1284 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
1285 acpi_thermal_check(tz);
1286 break;
1287 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +08001288 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -04001290 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +08001291 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +01001292 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 break;
1294 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +08001295 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
1296 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -04001297 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +08001298 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +01001299 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 break;
1301 default:
1302 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -04001303 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 break;
1305 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306}
1307
Len Brown4be44fc2005-08-05 00:44:28 -04001308static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309{
Len Brown4be44fc2005-08-05 00:44:28 -04001310 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
1313 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001314 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315
1316 /* Get temperature [_TMP] (required) */
1317 result = acpi_thermal_get_temperature(tz);
1318 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001319 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
1321 /* Get trip points [_CRT, _PSV, etc.] (required) */
1322 result = acpi_thermal_get_trip_points(tz);
1323 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001324 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
1326 /* Set the cooling mode [_SCP] to active cooling (default) */
1327 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -04001328 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
1331 /* Get default polling frequency [_TZP] (optional) */
1332 if (tzp)
1333 tz->polling_frequency = tzp;
1334 else
1335 acpi_thermal_get_polling_frequency(tz);
1336
Patrick Mocheld550d982006-06-27 00:41:40 -04001337 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338}
1339
Jean Delvare13614e32009-04-06 16:01:46 +02001340/*
1341 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1342 * handles temperature values with a single decimal place. As a consequence,
1343 * some implementations use an offset of 273.1 and others use an offset of
1344 * 273.2. Try to find out which one is being used, to present the most
1345 * accurate and visually appealing number.
1346 *
1347 * The heuristic below should work for all ACPI thermal zones which have a
1348 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1349 */
1350static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1351{
1352 if (tz->trips.critical.flags.valid &&
1353 (tz->trips.critical.temperature % 5) == 1)
1354 tz->kelvin_offset = 2731;
1355 else
1356 tz->kelvin_offset = 2732;
1357}
1358
Len Brown4be44fc2005-08-05 00:44:28 -04001359static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360{
Len Brown4be44fc2005-08-05 00:44:28 -04001361 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -04001362 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
1365 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001366 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
Burman Yan36bcbec2006-12-19 12:56:11 -08001368 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001370 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001372 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 strcpy(tz->name, device->pnp.bus_id);
1374 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1375 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001376 device->driver_data = tz;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001377 mutex_init(&tz->lock);
Zhang Rui3f655ef2008-01-17 15:51:11 +08001378
1379
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 result = acpi_thermal_get_info(tz);
1381 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001382 goto free_memory;
1383
Jean Delvare13614e32009-04-06 16:01:46 +02001384 acpi_thermal_guess_offset(tz);
1385
Zhang Rui3f655ef2008-01-17 15:51:11 +08001386 result = acpi_thermal_register_thermal_zone(tz);
1387 if (result)
1388 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389
1390 result = acpi_thermal_add_fs(device);
1391 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001392 goto unregister_thermal_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001395 acpi_device_name(device), acpi_device_bid(device),
1396 KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001397 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
Zhang Rui3f655ef2008-01-17 15:51:11 +08001399unregister_thermal_zone:
1400 thermal_zone_device_unregister(tz->thermal_zone);
1401free_memory:
1402 kfree(tz);
1403end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001404 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
Len Brown4be44fc2005-08-05 00:44:28 -04001407static int acpi_thermal_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408{
Len Brown4be44fc2005-08-05 00:44:28 -04001409 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001412 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001414 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 acpi_thermal_remove_fs(device);
Zhang Rui3f655ef2008-01-17 15:51:11 +08001417 acpi_thermal_unregister_thermal_zone(tz);
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001418 mutex_destroy(&tz->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001420 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421}
1422
Patrick Mochel5d9464a2006-12-07 20:56:27 +08001423static int acpi_thermal_resume(struct acpi_device *device)
Konstantin Karasyov74ce1462006-05-08 08:32:00 -04001424{
1425 struct acpi_thermal *tz = NULL;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001426 int i, j, power_state, result;
1427
Konstantin Karasyov74ce1462006-05-08 08:32:00 -04001428
1429 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001430 return -EINVAL;
Konstantin Karasyov74ce1462006-05-08 08:32:00 -04001431
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001432 tz = acpi_driver_data(device);
Konstantin Karasyov74ce1462006-05-08 08:32:00 -04001433
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001434 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001435 if (!(&tz->trips.active[i]))
1436 break;
1437 if (!tz->trips.active[i].flags.valid)
1438 break;
1439 tz->trips.active[i].flags.enabled = 1;
1440 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
1441 result = acpi_bus_get_power(tz->trips.active[i].devices.
1442 handles[j], &power_state);
1443 if (result || (power_state != ACPI_STATE_D0)) {
1444 tz->trips.active[i].flags.enabled = 0;
1445 break;
1446 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001447 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001448 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001449 }
1450
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001451 acpi_thermal_check(tz);
Konstantin Karasyov74ce1462006-05-08 08:32:00 -04001452
1453 return AE_OK;
1454}
1455
Jeff Garzik18552562007-10-03 15:15:40 -04001456static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001457
1458 if (act == 0) {
1459 printk(KERN_NOTICE "ACPI: %s detected: "
1460 "disabling all active thermal trip points\n", d->ident);
1461 act = -1;
1462 }
1463 return 0;
1464}
Jeff Garzik18552562007-10-03 15:15:40 -04001465static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001466
1467 printk(KERN_NOTICE "ACPI: %s detected: "
1468 "disabling all critical thermal trip point actions.\n", d->ident);
1469 nocrt = 1;
1470 return 0;
1471}
Jeff Garzik18552562007-10-03 15:15:40 -04001472static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001473
1474 if (tzp == 0) {
1475 printk(KERN_NOTICE "ACPI: %s detected: "
1476 "enabling thermal zone polling\n", d->ident);
1477 tzp = 300; /* 300 dS = 30 Seconds */
1478 }
1479 return 0;
1480}
Jeff Garzik18552562007-10-03 15:15:40 -04001481static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001482
1483 if (psv == 0) {
1484 printk(KERN_NOTICE "ACPI: %s detected: "
1485 "disabling all passive thermal trip points\n", d->ident);
1486 psv = -1;
1487 }
1488 return 0;
1489}
1490
1491static struct dmi_system_id thermal_dmi_table[] __initdata = {
1492 /*
1493 * Award BIOS on this AOpen makes thermal control almost worthless.
1494 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1495 */
1496 {
1497 .callback = thermal_act,
1498 .ident = "AOpen i915GMm-HFS",
1499 .matches = {
1500 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1501 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1502 },
1503 },
1504 {
1505 .callback = thermal_psv,
1506 .ident = "AOpen i915GMm-HFS",
1507 .matches = {
1508 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1509 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1510 },
1511 },
1512 {
1513 .callback = thermal_tzp,
1514 .ident = "AOpen i915GMm-HFS",
1515 .matches = {
1516 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1517 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1518 },
1519 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001520 {
1521 .callback = thermal_nocrt,
1522 .ident = "Gigabyte GA-7ZX",
1523 .matches = {
1524 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1525 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1526 },
1527 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001528 {}
1529};
Len Brown0b5bfa12007-08-12 00:13:02 -04001530
Len Brown4be44fc2005-08-05 00:44:28 -04001531static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532{
Len Brown4be44fc2005-08-05 00:44:28 -04001533 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534
Len Brown0b5bfa12007-08-12 00:13:02 -04001535 dmi_check_system(thermal_dmi_table);
1536
Len Brown72b33ef2007-08-12 00:12:17 -04001537 if (off) {
1538 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1539 return -ENODEV;
1540 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
1542 if (!acpi_thermal_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -04001543 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544
1545 result = acpi_bus_register_driver(&acpi_thermal_driver);
1546 if (result < 0) {
1547 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
Patrick Mocheld550d982006-06-27 00:41:40 -04001548 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 }
1550
Patrick Mocheld550d982006-06-27 00:41:40 -04001551 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552}
1553
Len Brown4be44fc2005-08-05 00:44:28 -04001554static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
1557 acpi_bus_unregister_driver(&acpi_thermal_driver);
1558
1559 remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
1560
Patrick Mocheld550d982006-06-27 00:41:40 -04001561 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562}
1563
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564module_init(acpi_thermal_init);
1565module_exit(acpi_thermal_exit);