blob: 93eac53b5110bc67f79077fdd17c73b8b3d79235 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * acpi_power.c - ACPI Bus Power Management ($Revision: 39 $)
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
26/*
27 * ACPI power-managed devices may be controlled in two ways:
28 * 1. via "Device Specific (D-State) Control"
29 * 2. via "Power Resource Control".
30 * This module is used to manage devices relying on Power Resource Control.
31 *
32 * An ACPI "power resource object" describes a software controllable power
33 * plane, clock plane, or other resource used by a power managed device.
34 * A device may rely on multiple power resources, and a power resource
35 * may be shared by multiple devices.
36 */
37
38#include <linux/kernel.h>
39#include <linux/module.h>
40#include <linux/init.h>
41#include <linux/types.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090042#include <linux/slab.h>
Lin Ming0090def2012-03-29 14:09:39 +080043#include <linux/pm_runtime.h>
Rafael J. Wysocki18a38702013-01-25 21:51:32 +010044#include <linux/sysfs.h>
Lv Zheng8b484632013-12-03 08:49:16 +080045#include <linux/acpi.h>
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +020046#include "sleep.h"
Lin Ming0090def2012-03-29 14:09:39 +080047#include "internal.h"
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +020048
Bjorn Helgaas89595b82008-11-07 16:57:45 -070049#define _COMPONENT ACPI_POWER_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050050ACPI_MODULE_NAME("power");
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_POWER_CLASS "power_resource"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define ACPI_POWER_DEVICE_NAME "Power Resource"
53#define ACPI_POWER_FILE_INFO "info"
54#define ACPI_POWER_FILE_STATUS "state"
55#define ACPI_POWER_RESOURCE_STATE_OFF 0x00
56#define ACPI_POWER_RESOURCE_STATE_ON 0x01
57#define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
Zhao Yakuif5adfaa2008-08-11 14:57:50 +080058
Len Brown4be44fc2005-08-05 00:44:28 -040059struct acpi_power_resource {
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +010060 struct acpi_device device;
Rafael J. Wysocki781d7372013-01-17 14:11:06 +010061 struct list_head list_node;
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +010062 char *name;
Len Brown4be44fc2005-08-05 00:44:28 -040063 u32 system_level;
64 u32 order;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +020065 unsigned int ref_count;
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +010066 bool wakeup_enabled;
Konstantin Karasyov0a613902007-02-16 01:47:06 -050067 struct mutex resource_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068};
69
Rafael J. Wysocki0b224522013-01-17 14:11:06 +010070struct acpi_power_resource_entry {
71 struct list_head node;
72 struct acpi_power_resource *resource;
73};
74
Rafael J. Wysocki781d7372013-01-17 14:11:06 +010075static LIST_HEAD(acpi_power_resource_list);
76static DEFINE_MUTEX(power_resource_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Linus Torvalds1da177e2005-04-16 15:20:36 -070078/* --------------------------------------------------------------------------
79 Power Resource Management
80 -------------------------------------------------------------------------- */
81
Rafael J. Wysockib1c0f992013-01-24 12:50:09 +010082static inline
83struct acpi_power_resource *to_power_resource(struct acpi_device *device)
84{
85 return container_of(device, struct acpi_power_resource, device);
86}
87
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +010088static struct acpi_power_resource *acpi_power_get_context(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +010090 struct acpi_device *device;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +010092 if (acpi_bus_get_device(handle, &device))
93 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Rafael J. Wysockib1c0f992013-01-24 12:50:09 +010095 return to_power_resource(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +010098static int acpi_power_resources_list_add(acpi_handle handle,
99 struct list_head *list)
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100100{
101 struct acpi_power_resource *resource = acpi_power_get_context(handle);
102 struct acpi_power_resource_entry *entry;
103
104 if (!resource || !list)
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100105 return -EINVAL;
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100106
107 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
108 if (!entry)
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100109 return -ENOMEM;
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100110
111 entry->resource = resource;
112 if (!list_empty(list)) {
113 struct acpi_power_resource_entry *e;
114
115 list_for_each_entry(e, list, node)
116 if (e->resource->order > resource->order) {
117 list_add_tail(&entry->node, &e->node);
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100118 return 0;
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100119 }
120 }
121 list_add_tail(&entry->node, list);
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100122 return 0;
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100123}
124
125void acpi_power_resources_list_free(struct list_head *list)
126{
127 struct acpi_power_resource_entry *entry, *e;
128
129 list_for_each_entry_safe(entry, e, list, node) {
130 list_del(&entry->node);
131 kfree(entry);
132 }
133}
134
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100135int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
136 struct list_head *list)
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100137{
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100138 unsigned int i;
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100139 int err = 0;
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100140
141 for (i = start; i < package->package.count; i++) {
142 union acpi_object *element = &package->package.elements[i];
143 acpi_handle rhandle;
144
145 if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100146 err = -ENODATA;
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100147 break;
148 }
149 rhandle = element->reference.handle;
150 if (!rhandle) {
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100151 err = -ENODEV;
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100152 break;
153 }
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100154 err = acpi_add_power_resource(rhandle);
155 if (err)
156 break;
157
158 err = acpi_power_resources_list_add(rhandle, list);
159 if (err)
160 break;
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100161 }
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100162 if (err)
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100163 acpi_power_resources_list_free(list);
164
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100165 return err;
Rafael J. Wysockief85bdb2013-01-17 14:11:07 +0100166}
167
Zhao Yakuia51e1452008-08-11 14:55:05 +0800168static int acpi_power_get_state(acpi_handle handle, int *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
Len Brown4be44fc2005-08-05 00:44:28 -0400170 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400171 unsigned long long sta = 0;
Lin Ming60a4ce72008-12-16 17:02:22 +0800172 char node_name[5];
173 struct acpi_buffer buffer = { sizeof(node_name), node_name };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Zhao Yakuia51e1452008-08-11 14:55:05 +0800176 if (!handle || !state)
Patrick Mocheld550d982006-06-27 00:41:40 -0400177 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Zhao Yakuia51e1452008-08-11 14:55:05 +0800179 status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400181 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Alexey Starikovskiyc35923b2007-10-22 14:19:09 +0400183 *state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON:
184 ACPI_POWER_RESOURCE_STATE_OFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Lin Ming60a4ce72008-12-16 17:02:22 +0800186 acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",
Lin Ming60a4ce72008-12-16 17:02:22 +0800189 node_name,
Zhao Yakuib1b57fb2008-10-27 16:04:53 +0800190 *state ? "on" : "off"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Patrick Mocheld550d982006-06-27 00:41:40 -0400192 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193}
194
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100195static int acpi_power_get_list_state(struct list_head *list, int *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196{
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100197 struct acpi_power_resource_entry *entry;
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100198 int cur_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 if (!list || !state)
Patrick Mocheld550d982006-06-27 00:41:40 -0400201 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 /* The state of the list is 'on' IFF all resources are 'on'. */
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100204 list_for_each_entry(entry, list, node) {
205 struct acpi_power_resource *resource = entry->resource;
206 acpi_handle handle = resource->device.handle;
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100207 int result;
208
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100209 mutex_lock(&resource->resource_lock);
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100210 result = acpi_power_get_state(handle, &cur_state);
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100211 mutex_unlock(&resource->resource_lock);
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100212 if (result)
213 return result;
214
215 if (cur_state != ACPI_POWER_RESOURCE_STATE_ON)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 break;
217 }
218
219 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource list is %s\n",
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100220 cur_state ? "on" : "off"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100222 *state = cur_state;
Rafael J. Wysockid0515d92011-01-06 23:38:57 +0100223 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200226static int __acpi_power_on(struct acpi_power_resource *resource)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
Len Brown4be44fc2005-08-05 00:44:28 -0400228 acpi_status status = AE_OK;
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500229
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100230 status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL);
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
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200234 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400235 resource->name));
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200236
Patrick Mocheld550d982006-06-27 00:41:40 -0400237 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100240static int acpi_power_on_unlocked(struct acpi_power_resource *resource)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100242 int result = 0;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200243
244 if (resource->ref_count++) {
245 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Mika Westerberg10a0b612013-07-05 12:15:56 +0300246 "Power resource [%s] already on\n",
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200247 resource->name));
248 } else {
249 result = __acpi_power_on(resource);
Rafael J. Wysocki41863fc2013-10-16 23:05:42 +0200250 if (result)
Rafael J. Wysocki12b3b5a2010-11-25 00:03:32 +0100251 resource->ref_count--;
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500252 }
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100253 return result;
254}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100256static int acpi_power_on(struct acpi_power_resource *resource)
257{
258 int result;
259
260 mutex_lock(&resource->resource_lock);
261 result = acpi_power_on_unlocked(resource);
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500262 mutex_unlock(&resource->resource_lock);
Rafael J. Wysocki12b3b5a2010-11-25 00:03:32 +0100263 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264}
265
Rafael J. Wysocki660b1112013-01-25 21:51:57 +0100266static int __acpi_power_off(struct acpi_power_resource *resource)
267{
268 acpi_status status;
269
270 status = acpi_evaluate_object(resource->device.handle, "_OFF",
271 NULL, NULL);
272 if (ACPI_FAILURE(status))
273 return -ENODEV;
274
275 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned off\n",
276 resource->name));
277 return 0;
278}
279
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100280static int acpi_power_off_unlocked(struct acpi_power_resource *resource)
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200281{
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100282 int result = 0;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200283
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200284 if (!resource->ref_count) {
285 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Mika Westerberg10a0b612013-07-05 12:15:56 +0300286 "Power resource [%s] already off\n",
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200287 resource->name));
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100288 return 0;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200289 }
290
291 if (--resource->ref_count) {
292 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
293 "Power resource [%s] still in use\n",
294 resource->name));
Rafael J. Wysocki660b1112013-01-25 21:51:57 +0100295 } else {
296 result = __acpi_power_off(resource);
297 if (result)
298 resource->ref_count++;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200299 }
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100300 return result;
301}
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200302
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100303static int acpi_power_off(struct acpi_power_resource *resource)
304{
305 int result;
306
307 mutex_lock(&resource->resource_lock);
308 result = acpi_power_off_unlocked(resource);
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200309 mutex_unlock(&resource->resource_lock);
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200310 return result;
311}
312
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100313static int acpi_power_off_list(struct list_head *list)
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100314{
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100315 struct acpi_power_resource_entry *entry;
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100316 int result = 0;
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100317
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100318 list_for_each_entry_reverse(entry, list, node) {
319 result = acpi_power_off(entry->resource);
320 if (result)
321 goto err;
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100322 }
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100323 return 0;
324
325 err:
326 list_for_each_entry_continue(entry, list, node)
327 acpi_power_on(entry->resource);
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100328
329 return result;
330}
331
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100332static int acpi_power_on_list(struct list_head *list)
333{
334 struct acpi_power_resource_entry *entry;
335 int result = 0;
336
337 list_for_each_entry(entry, list, node) {
338 result = acpi_power_on(entry->resource);
339 if (result)
340 goto err;
341 }
342 return 0;
343
344 err:
345 list_for_each_entry_continue_reverse(entry, list, node)
346 acpi_power_off(entry->resource);
347
348 return result;
349}
350
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100351static struct attribute *attrs[] = {
352 NULL,
353};
354
355static struct attribute_group attr_groups[] = {
356 [ACPI_STATE_D0] = {
357 .name = "power_resources_D0",
358 .attrs = attrs,
359 },
360 [ACPI_STATE_D1] = {
361 .name = "power_resources_D1",
362 .attrs = attrs,
363 },
364 [ACPI_STATE_D2] = {
365 .name = "power_resources_D2",
366 .attrs = attrs,
367 },
368 [ACPI_STATE_D3_HOT] = {
369 .name = "power_resources_D3hot",
370 .attrs = attrs,
371 },
372};
373
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200374static struct attribute_group wakeup_attr_group = {
375 .name = "power_resources_wakeup",
376 .attrs = attrs,
377};
378
379static void acpi_power_hide_list(struct acpi_device *adev,
380 struct list_head *resources,
381 struct attribute_group *attr_group)
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100382{
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100383 struct acpi_power_resource_entry *entry;
384
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200385 if (list_empty(resources))
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100386 return;
387
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200388 list_for_each_entry_reverse(entry, resources, node) {
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100389 struct acpi_device *res_dev = &entry->resource->device;
390
391 sysfs_remove_link_from_group(&adev->dev.kobj,
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200392 attr_group->name,
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100393 dev_name(&res_dev->dev));
394 }
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200395 sysfs_remove_group(&adev->dev.kobj, attr_group);
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100396}
397
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200398static void acpi_power_expose_list(struct acpi_device *adev,
399 struct list_head *resources,
400 struct attribute_group *attr_group)
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100401{
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100402 struct acpi_power_resource_entry *entry;
403 int ret;
404
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200405 if (list_empty(resources))
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100406 return;
407
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200408 ret = sysfs_create_group(&adev->dev.kobj, attr_group);
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100409 if (ret)
410 return;
411
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200412 list_for_each_entry(entry, resources, node) {
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100413 struct acpi_device *res_dev = &entry->resource->device;
414
415 ret = sysfs_add_link_to_group(&adev->dev.kobj,
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200416 attr_group->name,
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100417 &res_dev->dev.kobj,
418 dev_name(&res_dev->dev));
419 if (ret) {
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200420 acpi_power_hide_list(adev, resources, attr_group);
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100421 break;
422 }
423 }
424}
425
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200426static void acpi_power_expose_hide(struct acpi_device *adev,
427 struct list_head *resources,
428 struct attribute_group *attr_group,
429 bool expose)
430{
431 if (expose)
432 acpi_power_expose_list(adev, resources, attr_group);
433 else
434 acpi_power_hide_list(adev, resources, attr_group);
435}
436
Rafael J. Wysockibc9b6402013-01-17 14:11:05 +0100437void acpi_power_add_remove_device(struct acpi_device *adev, bool add)
438{
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100439 int state;
Rafael J. Wysockibc9b6402013-01-17 14:11:05 +0100440
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200441 if (adev->wakeup.flags.valid)
442 acpi_power_expose_hide(adev, &adev->wakeup.resources,
443 &wakeup_attr_group, add);
444
Rafael J. Wysocki18a38702013-01-25 21:51:32 +0100445 if (!adev->power.flags.power_resources)
446 return;
Rafael J. Wysockibc9b6402013-01-17 14:11:05 +0100447
Rafael J. Wysocki41a2a462013-04-11 22:41:48 +0200448 for (state = ACPI_STATE_D0; state <= ACPI_STATE_D3_HOT; state++)
449 acpi_power_expose_hide(adev,
450 &adev->power.states[state].resources,
451 &attr_groups[state], add);
Lin Ming0090def2012-03-29 14:09:39 +0800452}
Rafael J. Wysockibc9b6402013-01-17 14:11:05 +0100453
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100454int acpi_power_wakeup_list_init(struct list_head *list, int *system_level_p)
Rafael J. Wysocki0596a522013-01-17 14:11:07 +0100455{
456 struct acpi_power_resource_entry *entry;
457 int system_level = 5;
458
459 list_for_each_entry(entry, list, node) {
460 struct acpi_power_resource *resource = entry->resource;
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100461 acpi_handle handle = resource->device.handle;
462 int result;
463 int state;
Rafael J. Wysocki0596a522013-01-17 14:11:07 +0100464
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100465 mutex_lock(&resource->resource_lock);
466
467 result = acpi_power_get_state(handle, &state);
468 if (result) {
469 mutex_unlock(&resource->resource_lock);
470 return result;
471 }
472 if (state == ACPI_POWER_RESOURCE_STATE_ON) {
473 resource->ref_count++;
474 resource->wakeup_enabled = true;
475 }
Rafael J. Wysocki0596a522013-01-17 14:11:07 +0100476 if (system_level > resource->system_level)
477 system_level = resource->system_level;
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100478
479 mutex_unlock(&resource->resource_lock);
Rafael J. Wysocki0596a522013-01-17 14:11:07 +0100480 }
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100481 *system_level_p = system_level;
482 return 0;
Rafael J. Wysocki0596a522013-01-17 14:11:07 +0100483}
484
Rafael J. Wysockibc9b6402013-01-17 14:11:05 +0100485/* --------------------------------------------------------------------------
486 Device Power Management
487 -------------------------------------------------------------------------- */
Lin Ming0090def2012-03-29 14:09:39 +0800488
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200489/**
490 * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in
491 * ACPI 3.0) _PSW (Power State Wake)
492 * @dev: Device to handle.
493 * @enable: 0 - disable, 1 - enable the wake capabilities of the device.
494 * @sleep_state: Target sleep state of the system.
495 * @dev_state: Target power state of the device.
496 *
497 * Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power
498 * State Wake) for the device, if present. On failure reset the device's
499 * wakeup.flags.valid flag.
500 *
501 * RETURN VALUE:
502 * 0 if either _DSW or _PSW has been successfully executed
503 * 0 if neither _DSW nor _PSW has been found
504 * -ENODEV if the execution of either _DSW or _PSW has failed
505 */
506int acpi_device_sleep_wake(struct acpi_device *dev,
507 int enable, int sleep_state, int dev_state)
508{
509 union acpi_object in_arg[3];
510 struct acpi_object_list arg_list = { 3, in_arg };
511 acpi_status status = AE_OK;
512
513 /*
514 * Try to execute _DSW first.
515 *
516 * Three agruments are needed for the _DSW object:
517 * Argument 0: enable/disable the wake capabilities
518 * Argument 1: target system state
519 * Argument 2: target device state
520 * When _DSW object is called to disable the wake capabilities, maybe
521 * the first argument is filled. The values of the other two agruments
522 * are meaningless.
523 */
524 in_arg[0].type = ACPI_TYPE_INTEGER;
525 in_arg[0].integer.value = enable;
526 in_arg[1].type = ACPI_TYPE_INTEGER;
527 in_arg[1].integer.value = sleep_state;
528 in_arg[2].type = ACPI_TYPE_INTEGER;
529 in_arg[2].integer.value = dev_state;
530 status = acpi_evaluate_object(dev->handle, "_DSW", &arg_list, NULL);
531 if (ACPI_SUCCESS(status)) {
532 return 0;
533 } else if (status != AE_NOT_FOUND) {
534 printk(KERN_ERR PREFIX "_DSW execution failed\n");
535 dev->wakeup.flags.valid = 0;
536 return -ENODEV;
537 }
538
539 /* Execute _PSW */
Jiang Liu0db98202013-06-29 00:24:39 +0800540 status = acpi_execute_simple_method(dev->handle, "_PSW", enable);
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200541 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
542 printk(KERN_ERR PREFIX "_PSW execution failed\n");
543 dev->wakeup.flags.valid = 0;
544 return -ENODEV;
545 }
546
547 return 0;
548}
549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550/*
551 * Prepare a wakeup device, two steps (Ref ACPI 2.0:P229):
552 * 1. Power on the power resources required for the wakeup device
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200553 * 2. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power
554 * State Wake) for the device, if present
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 */
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200556int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100558 struct acpi_power_resource_entry *entry;
Rafael J. Wysocki993cbe52013-01-17 14:11:06 +0100559 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 if (!dev || !dev->wakeup.flags.valid)
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200562 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200564 mutex_lock(&acpi_device_lock);
565
566 if (dev->wakeup.prepare_count++)
567 goto out;
Rafael J. Wysocki0af4b8c2008-07-07 03:34:11 +0200568
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100569 list_for_each_entry(entry, &dev->wakeup.resources, node) {
570 struct acpi_power_resource *resource = entry->resource;
571
572 mutex_lock(&resource->resource_lock);
573
574 if (!resource->wakeup_enabled) {
575 err = acpi_power_on_unlocked(resource);
576 if (!err)
577 resource->wakeup_enabled = true;
578 }
579
580 mutex_unlock(&resource->resource_lock);
581
582 if (err) {
583 dev_err(&dev->dev,
584 "Cannot turn wakeup power resources on\n");
585 dev->wakeup.flags.valid = 0;
586 goto out;
587 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100589 /*
590 * Passing 3 as the third argument below means the device may be
591 * put into arbitrary power state afterward.
592 */
593 err = acpi_device_sleep_wake(dev, 1, sleep_state, 3);
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200594 if (err)
595 dev->wakeup.prepare_count = 0;
596
597 out:
598 mutex_unlock(&acpi_device_lock);
Rafael J. Wysocki0af4b8c2008-07-07 03:34:11 +0200599 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600}
601
602/*
603 * Shutdown a wakeup device, counterpart of above method
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200604 * 1. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power
605 * State Wake) for the device, if present
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 * 2. Shutdown down the power resources
607 */
Len Brown4be44fc2005-08-05 00:44:28 -0400608int acpi_disable_wakeup_device_power(struct acpi_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609{
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100610 struct acpi_power_resource_entry *entry;
Rafael J. Wysocki993cbe52013-01-17 14:11:06 +0100611 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 if (!dev || !dev->wakeup.flags.valid)
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200614 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200616 mutex_lock(&acpi_device_lock);
617
618 if (--dev->wakeup.prepare_count > 0)
619 goto out;
620
Rafael J. Wysocki0af4b8c2008-07-07 03:34:11 +0200621 /*
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200622 * Executing the code below even if prepare_count is already zero when
623 * the function is called may be useful, for example for initialisation.
Rafael J. Wysocki0af4b8c2008-07-07 03:34:11 +0200624 */
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200625 if (dev->wakeup.prepare_count < 0)
626 dev->wakeup.prepare_count = 0;
Rafael J. Wysocki0af4b8c2008-07-07 03:34:11 +0200627
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200628 err = acpi_device_sleep_wake(dev, 0, 0, 0);
629 if (err)
630 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Rafael J. Wysockib5d667e2013-02-23 23:15:21 +0100632 list_for_each_entry(entry, &dev->wakeup.resources, node) {
633 struct acpi_power_resource *resource = entry->resource;
634
635 mutex_lock(&resource->resource_lock);
636
637 if (resource->wakeup_enabled) {
638 err = acpi_power_off_unlocked(resource);
639 if (!err)
640 resource->wakeup_enabled = false;
641 }
642
643 mutex_unlock(&resource->resource_lock);
644
645 if (err) {
646 dev_err(&dev->dev,
647 "Cannot turn wakeup power resources off\n");
648 dev->wakeup.flags.valid = 0;
649 break;
650 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
652
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200653 out:
654 mutex_unlock(&acpi_device_lock);
655 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656}
657
Rafael J. Wysocki32a00d22010-11-25 00:05:17 +0100658int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
Len Brown4be44fc2005-08-05 00:44:28 -0400660 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400661 int list_state = 0;
662 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Rafael J. Wysocki32a00d22010-11-25 00:05:17 +0100664 if (!device || !state)
Patrick Mocheld550d982006-06-27 00:41:40 -0400665 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 /*
668 * We know a device's inferred power state when all the resources
669 * required for a given D-state are 'on'.
670 */
Rafael J. Wysocki38c92ff2012-05-20 13:58:00 +0200671 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100672 struct list_head *list = &device->power.states[i].resources;
673
674 if (list_empty(list))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 continue;
676
677 result = acpi_power_get_list_state(list, &list_state);
678 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -0400679 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 if (list_state == ACPI_POWER_RESOURCE_STATE_ON) {
Rafael J. Wysocki32a00d22010-11-25 00:05:17 +0100682 *state = i;
Patrick Mocheld550d982006-06-27 00:41:40 -0400683 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 }
685 }
686
Rafael J. Wysocki20dacb72015-05-16 01:55:35 +0200687 *state = device->power.states[ACPI_STATE_D3_COLD].flags.valid ?
688 ACPI_STATE_D3_COLD : ACPI_STATE_D3_HOT;
Patrick Mocheld550d982006-06-27 00:41:40 -0400689 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690}
691
Rafael J. Wysocki30d3df42010-11-25 00:06:55 +0100692int acpi_power_on_resources(struct acpi_device *device, int state)
693{
Rafael J. Wysocki87e753b2013-01-22 12:56:16 +0100694 if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3_HOT)
Rafael J. Wysocki30d3df42010-11-25 00:06:55 +0100695 return -EINVAL;
696
697 return acpi_power_on_list(&device->power.states[state].resources);
698}
699
Len Brown4be44fc2005-08-05 00:44:28 -0400700int acpi_power_transition(struct acpi_device *device, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701{
Rafael J. Wysocki5c7dd712012-05-18 00:39:35 +0200702 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
Zhang Rui3ebc81b2012-03-29 14:09:38 +0800704 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
Patrick Mocheld550d982006-06-27 00:41:40 -0400705 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Rafael J. Wysocki0b224522013-01-17 14:11:06 +0100707 if (device->power.state == state || !device->flags.power_manageable)
Rafael J. Wysocki212967c2010-11-25 00:02:36 +0100708 return 0;
709
Len Brown4be44fc2005-08-05 00:44:28 -0400710 if ((device->power.state < ACPI_STATE_D0)
Zhang Rui3ebc81b2012-03-29 14:09:38 +0800711 || (device->power.state > ACPI_STATE_D3_COLD))
Patrick Mocheld550d982006-06-27 00:41:40 -0400712 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 /*
715 * First we reference all power resources required in the target list
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100716 * (e.g. so the device doesn't lose power while transitioning). Then,
717 * we dereference all power resources used in the current list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 */
Rafael J. Wysocki5c7dd712012-05-18 00:39:35 +0200719 if (state < ACPI_STATE_D3_COLD)
720 result = acpi_power_on_list(
721 &device->power.states[state].resources);
722
723 if (!result && device->power.state < ACPI_STATE_D3_COLD)
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100724 acpi_power_off_list(
725 &device->power.states[device->power.state].resources);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Rafael J. Wysockid2ef5552010-11-25 00:06:09 +0100727 /* We shouldn't change the state unless the above operations succeed. */
728 device->power.state = result ? ACPI_STATE_UNKNOWN : state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
Patrick Mocheld550d982006-06-27 00:41:40 -0400730 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731}
732
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100733static void acpi_release_power_resource(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734{
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100735 struct acpi_device *device = to_acpi_device(dev);
736 struct acpi_power_resource *resource;
737
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100738 resource = container_of(device, struct acpi_power_resource, device);
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100739
740 mutex_lock(&power_resource_list_lock);
741 list_del(&resource->list_node);
742 mutex_unlock(&power_resource_list_lock);
743
Toshi Kanic0af4172013-03-04 21:30:42 +0000744 acpi_free_pnp_ids(&device->pnp);
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100745 kfree(resource);
746}
747
Rafael J. Wysockib1c0f992013-01-24 12:50:09 +0100748static ssize_t acpi_power_in_use_show(struct device *dev,
749 struct device_attribute *attr,
750 char *buf) {
751 struct acpi_power_resource *resource;
752
753 resource = to_power_resource(to_acpi_device(dev));
754 return sprintf(buf, "%u\n", !!resource->ref_count);
755}
756static DEVICE_ATTR(resource_in_use, 0444, acpi_power_in_use_show, NULL);
757
758static void acpi_power_sysfs_remove(struct acpi_device *device)
759{
760 device_remove_file(&device->dev, &dev_attr_resource_in_use);
761}
762
Rafael J. Wysockid5eefa82015-05-21 04:19:49 +0200763static void acpi_power_add_resource_to_list(struct acpi_power_resource *resource)
764{
765 mutex_lock(&power_resource_list_lock);
766
767 if (!list_empty(&acpi_power_resource_list)) {
768 struct acpi_power_resource *r;
769
770 list_for_each_entry(r, &acpi_power_resource_list, list_node)
771 if (r->order > resource->order) {
772 list_add_tail(&resource->list_node, &r->list_node);
773 goto out;
774 }
775 }
776 list_add_tail(&resource->list_node, &acpi_power_resource_list);
777
778 out:
779 mutex_unlock(&power_resource_list_lock);
780}
781
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100782int acpi_add_power_resource(acpi_handle handle)
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100783{
784 struct acpi_power_resource *resource;
785 struct acpi_device *device = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400786 union acpi_object acpi_object;
787 struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object };
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100788 acpi_status status;
789 int state, result = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100791 acpi_bus_get_device(handle, &device);
792 if (device)
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100793 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100795 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 if (!resource)
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100797 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100799 device = &resource->device;
800 acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER,
801 ACPI_STA_DEFAULT);
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500802 mutex_init(&resource->resource_lock);
Rafael J. Wysocki6ee22e9d2013-06-19 00:44:45 +0200803 INIT_LIST_HEAD(&resource->list_node);
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100804 resource->name = device->pnp.bus_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
806 strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
Rafael J. Wysocki722c9292013-01-17 14:11:06 +0100807 device->power.state = ACPI_STATE_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809 /* Evalute the object to get the system level and resource order. */
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100810 status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
811 if (ACPI_FAILURE(status))
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100812 goto err;
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 resource->system_level = acpi_object.power_resource.system_level;
815 resource->order = acpi_object.power_resource.resource_order;
816
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100817 result = acpi_power_get_state(handle, &state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 if (result)
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100819 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Len Brown4be44fc2005-08-05 00:44:28 -0400821 printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device),
Alexey Starikovskiyc35923b2007-10-22 14:19:09 +0400822 acpi_device_bid(device), state ? "on" : "off");
Len Brown4be44fc2005-08-05 00:44:28 -0400823
Rafael J. Wysocki82c7d5e2013-01-17 14:11:05 +0100824 device->flags.match_driver = true;
Rafael J. Wysockicf860be2013-01-24 12:49:49 +0100825 result = acpi_device_add(device, acpi_release_power_resource);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 if (result)
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100827 goto err;
Len Brown4be44fc2005-08-05 00:44:28 -0400828
Rafael J. Wysockib1c0f992013-01-24 12:50:09 +0100829 if (!device_create_file(&device->dev, &dev_attr_resource_in_use))
830 device->remove = acpi_power_sysfs_remove;
831
Rafael J. Wysockid5eefa82015-05-21 04:19:49 +0200832 acpi_power_add_resource_to_list(resource);
Rafael J. Wysockicf860be2013-01-24 12:49:49 +0100833 acpi_device_add_finalize(device);
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100834 return 0;
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100835
836 err:
837 acpi_release_power_resource(&device->dev);
Rafael J. Wysockie88c9c62013-01-17 14:11:07 +0100838 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839}
840
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100841#ifdef CONFIG_ACPI_SLEEP
842void acpi_resume_power_resources(void)
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500843{
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200844 struct acpi_power_resource *resource;
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500845
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100846 mutex_lock(&power_resource_list_lock);
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500847
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100848 list_for_each_entry(resource, &acpi_power_resource_list, list_node) {
849 int result, state;
Rafael J. Wysocki3e384ee2010-10-22 02:35:54 +0200850
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100851 mutex_lock(&resource->resource_lock);
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500852
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100853 result = acpi_power_get_state(resource->device.handle, &state);
Lan Tianyud7d49012013-10-15 19:48:11 +0800854 if (result) {
855 mutex_unlock(&resource->resource_lock);
Rafael J. Wysocki660b1112013-01-25 21:51:57 +0100856 continue;
Lan Tianyud7d49012013-10-15 19:48:11 +0800857 }
Rafael J. Wysocki660b1112013-01-25 21:51:57 +0100858
859 if (state == ACPI_POWER_RESOURCE_STATE_OFF
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100860 && resource->ref_count) {
861 dev_info(&resource->device.dev, "Turning ON\n");
862 __acpi_power_on(resource);
Rafael J. Wysockid5eefa82015-05-21 04:19:49 +0200863 }
864
865 mutex_unlock(&resource->resource_lock);
866 }
867 list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) {
868 int result, state;
869
870 mutex_lock(&resource->resource_lock);
871
872 result = acpi_power_get_state(resource->device.handle, &state);
873 if (result) {
874 mutex_unlock(&resource->resource_lock);
875 continue;
876 }
877
878 if (state == ACPI_POWER_RESOURCE_STATE_ON
Rafael J. Wysocki660b1112013-01-25 21:51:57 +0100879 && !resource->ref_count) {
880 dev_info(&resource->device.dev, "Turning OFF\n");
881 __acpi_power_off(resource);
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100882 }
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500883
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100884 mutex_unlock(&resource->resource_lock);
885 }
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500886
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100887 mutex_unlock(&power_resource_list_lock);
Konstantin Karasyov0a613902007-02-16 01:47:06 -0500888}
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200889#endif