Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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> |
| 42 | #include <linux/proc_fs.h> |
| 43 | #include <linux/seq_file.h> |
| 44 | #include <acpi/acpi_bus.h> |
| 45 | #include <acpi/acpi_drivers.h> |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define _COMPONENT ACPI_POWER_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 48 | ACPI_MODULE_NAME("power"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #define ACPI_POWER_COMPONENT 0x00800000 |
| 50 | #define ACPI_POWER_CLASS "power_resource" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define ACPI_POWER_DEVICE_NAME "Power Resource" |
| 52 | #define ACPI_POWER_FILE_INFO "info" |
| 53 | #define ACPI_POWER_FILE_STATUS "state" |
| 54 | #define ACPI_POWER_RESOURCE_STATE_OFF 0x00 |
| 55 | #define ACPI_POWER_RESOURCE_STATE_ON 0x01 |
| 56 | #define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | static int acpi_power_add(struct acpi_device *device); |
| 58 | static int acpi_power_remove(struct acpi_device *device, int type); |
Len Brown | e8363f3 | 2007-02-16 02:05:39 -0500 | [diff] [blame] | 59 | static int acpi_power_resume(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | static int acpi_power_open_fs(struct inode *inode, struct file *file); |
| 61 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 62 | static struct acpi_device_id power_device_ids[] = { |
| 63 | {ACPI_POWER_HID, 0}, |
| 64 | {"", 0}, |
| 65 | }; |
| 66 | MODULE_DEVICE_TABLE(acpi, power_device_ids); |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static struct acpi_driver acpi_power_driver = { |
Len Brown | c2b6705b | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 69 | .name = "power", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 70 | .class = ACPI_POWER_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 71 | .ids = power_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | .ops = { |
| 73 | .add = acpi_power_add, |
| 74 | .remove = acpi_power_remove, |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 75 | .resume = acpi_power_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 76 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | }; |
| 78 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 79 | struct acpi_power_reference { |
| 80 | struct list_head node; |
| 81 | struct acpi_device *device; |
| 82 | }; |
| 83 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | struct acpi_power_resource { |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 85 | struct acpi_device * device; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | acpi_bus_id name; |
| 87 | u32 system_level; |
| 88 | u32 order; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 89 | struct mutex resource_lock; |
| 90 | struct list_head reference; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | }; |
| 92 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 93 | static struct list_head acpi_power_resource_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 95 | static const struct file_operations acpi_power_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 96 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 97 | .open = acpi_power_open_fs, |
| 98 | .read = seq_read, |
| 99 | .llseek = seq_lseek, |
| 100 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | /* -------------------------------------------------------------------------- |
| 104 | Power Resource Management |
| 105 | -------------------------------------------------------------------------- */ |
| 106 | |
| 107 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | acpi_power_get_context(acpi_handle handle, |
| 109 | struct acpi_power_resource **resource) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | int result = 0; |
| 112 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | if (!resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 116 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | result = acpi_bus_get_device(handle, &device); |
| 119 | if (result) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 120 | printk(KERN_WARNING PREFIX "Getting context [%p]\n", handle); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 121 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 124 | *resource = acpi_driver_data(device); |
Li Zefan | a815ab8 | 2008-04-18 13:27:29 -0700 | [diff] [blame] | 125 | if (!*resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 126 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 128 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
| 130 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 131 | static int acpi_power_get_state(struct acpi_power_resource *resource, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 133 | acpi_status status = AE_OK; |
| 134 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 137 | if (!resource || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 138 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 140 | status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 142 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 144 | *state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON: |
| 145 | ACPI_POWER_RESOURCE_STATE_OFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n", |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 148 | resource->name, state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 150 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 155 | int result = 0, state1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | struct acpi_power_resource *resource = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | u32 i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | if (!list || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 161 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | /* The state of the list is 'on' IFF all resources are 'on'. */ |
| 164 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | for (i = 0; i < list->count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | result = acpi_power_get_context(list->handles[i], &resource); |
| 167 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 168 | return result; |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 169 | result = acpi_power_get_state(resource, &state1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 171 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 173 | *state = state1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | if (*state != ACPI_POWER_RESOURCE_STATE_ON) |
| 176 | break; |
| 177 | } |
| 178 | |
| 179 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource list is %s\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | *state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 182 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 185 | static int acpi_power_on(acpi_handle handle, struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 187 | int result = 0, state; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 188 | int found = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 189 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 191 | struct list_head *node, *next; |
| 192 | struct acpi_power_reference *ref; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | result = acpi_power_get_context(handle, &resource); |
| 196 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 197 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 199 | mutex_lock(&resource->resource_lock); |
| 200 | list_for_each_safe(node, next, &resource->reference) { |
| 201 | ref = container_of(node, struct acpi_power_reference, node); |
| 202 | if (dev->handle == ref->device->handle) { |
| 203 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] already referenced by resource [%s]\n", |
| 204 | dev->pnp.bus_id, resource->name)); |
| 205 | found = 1; |
| 206 | break; |
| 207 | } |
| 208 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 210 | if (!found) { |
| 211 | ref = kmalloc(sizeof (struct acpi_power_reference), |
| 212 | irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL); |
| 213 | if (!ref) { |
| 214 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "kmalloc() failed\n")); |
| 215 | mutex_unlock(&resource->resource_lock); |
| 216 | return -ENOMEM; |
| 217 | } |
| 218 | list_add_tail(&ref->node, &resource->reference); |
| 219 | ref->device = dev; |
| 220 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] added to resource [%s] references\n", |
| 221 | dev->pnp.bus_id, resource->name)); |
| 222 | } |
| 223 | mutex_unlock(&resource->resource_lock); |
| 224 | |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 225 | status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 227 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 229 | result = acpi_power_get_state(resource, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 231 | return result; |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 232 | if (state != ACPI_POWER_RESOURCE_STATE_ON) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 233 | return -ENOEXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
| 235 | /* Update the power resource's _device_ power state */ |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 236 | resource->device->power.state = ACPI_STATE_D0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned on\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 239 | resource->name)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 240 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 243 | static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 245 | int result = 0, state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 246 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 248 | struct list_head *node, *next; |
| 249 | struct acpi_power_reference *ref; |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | result = acpi_power_get_context(handle, &resource); |
| 253 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 254 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 256 | mutex_lock(&resource->resource_lock); |
| 257 | list_for_each_safe(node, next, &resource->reference) { |
| 258 | ref = container_of(node, struct acpi_power_reference, node); |
| 259 | if (dev->handle == ref->device->handle) { |
| 260 | list_del(&ref->node); |
| 261 | kfree(ref); |
| 262 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] removed from resource [%s] references\n", |
| 263 | dev->pnp.bus_id, resource->name)); |
| 264 | break; |
| 265 | } |
| 266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 268 | if (!list_empty(&resource->reference)) { |
| 269 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cannot turn resource [%s] off - resource is in use\n", |
| 270 | resource->name)); |
| 271 | mutex_unlock(&resource->resource_lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 272 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 274 | mutex_unlock(&resource->resource_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 276 | status = acpi_evaluate_object(resource->device->handle, "_OFF", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 278 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 280 | result = acpi_power_get_state(resource, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 282 | return result; |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 283 | if (state != ACPI_POWER_RESOURCE_STATE_OFF) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 284 | return -ENOEXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
| 286 | /* Update the power resource's _device_ power state */ |
Dmitry Torokhov | 786f18c | 2006-08-23 23:18:06 -0400 | [diff] [blame] | 287 | resource->device->power.state = ACPI_STATE_D3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
| 289 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned off\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | resource->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 292 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 295 | /** |
| 296 | * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in |
| 297 | * ACPI 3.0) _PSW (Power State Wake) |
| 298 | * @dev: Device to handle. |
| 299 | * @enable: 0 - disable, 1 - enable the wake capabilities of the device. |
| 300 | * @sleep_state: Target sleep state of the system. |
| 301 | * @dev_state: Target power state of the device. |
| 302 | * |
| 303 | * Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 304 | * State Wake) for the device, if present. On failure reset the device's |
| 305 | * wakeup.flags.valid flag. |
| 306 | * |
| 307 | * RETURN VALUE: |
| 308 | * 0 if either _DSW or _PSW has been successfully executed |
| 309 | * 0 if neither _DSW nor _PSW has been found |
| 310 | * -ENODEV if the execution of either _DSW or _PSW has failed |
| 311 | */ |
| 312 | int acpi_device_sleep_wake(struct acpi_device *dev, |
| 313 | int enable, int sleep_state, int dev_state) |
| 314 | { |
| 315 | union acpi_object in_arg[3]; |
| 316 | struct acpi_object_list arg_list = { 3, in_arg }; |
| 317 | acpi_status status = AE_OK; |
| 318 | |
| 319 | /* |
| 320 | * Try to execute _DSW first. |
| 321 | * |
| 322 | * Three agruments are needed for the _DSW object: |
| 323 | * Argument 0: enable/disable the wake capabilities |
| 324 | * Argument 1: target system state |
| 325 | * Argument 2: target device state |
| 326 | * When _DSW object is called to disable the wake capabilities, maybe |
| 327 | * the first argument is filled. The values of the other two agruments |
| 328 | * are meaningless. |
| 329 | */ |
| 330 | in_arg[0].type = ACPI_TYPE_INTEGER; |
| 331 | in_arg[0].integer.value = enable; |
| 332 | in_arg[1].type = ACPI_TYPE_INTEGER; |
| 333 | in_arg[1].integer.value = sleep_state; |
| 334 | in_arg[2].type = ACPI_TYPE_INTEGER; |
| 335 | in_arg[2].integer.value = dev_state; |
| 336 | status = acpi_evaluate_object(dev->handle, "_DSW", &arg_list, NULL); |
| 337 | if (ACPI_SUCCESS(status)) { |
| 338 | return 0; |
| 339 | } else if (status != AE_NOT_FOUND) { |
| 340 | printk(KERN_ERR PREFIX "_DSW execution failed\n"); |
| 341 | dev->wakeup.flags.valid = 0; |
| 342 | return -ENODEV; |
| 343 | } |
| 344 | |
| 345 | /* Execute _PSW */ |
| 346 | arg_list.count = 1; |
| 347 | in_arg[0].integer.value = enable; |
| 348 | status = acpi_evaluate_object(dev->handle, "_PSW", &arg_list, NULL); |
| 349 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| 350 | printk(KERN_ERR PREFIX "_PSW execution failed\n"); |
| 351 | dev->wakeup.flags.valid = 0; |
| 352 | return -ENODEV; |
| 353 | } |
| 354 | |
| 355 | return 0; |
| 356 | } |
| 357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | /* |
| 359 | * Prepare a wakeup device, two steps (Ref ACPI 2.0:P229): |
| 360 | * 1. Power on the power resources required for the wakeup device |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 361 | * 2. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 362 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | */ |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 364 | int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 366 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 369 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | /* Open power resource */ |
| 372 | for (i = 0; i < dev->wakeup.resources.count; i++) { |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 373 | int ret = acpi_power_on(dev->wakeup.resources.handles[i], dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | if (ret) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 375 | printk(KERN_ERR PREFIX "Transition power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | dev->wakeup.flags.valid = 0; |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 377 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | } |
| 380 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 381 | /* |
| 382 | * Passing 3 as the third argument below means the device may be placed |
| 383 | * in arbitrary power state afterwards. |
| 384 | */ |
| 385 | return acpi_device_sleep_wake(dev, 1, sleep_state, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Shutdown a wakeup device, counterpart of above method |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 390 | * 1. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 391 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | * 2. Shutdown down the power resources |
| 393 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 394 | int acpi_disable_wakeup_device_power(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 396 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
| 398 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 399 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 401 | ret = acpi_device_sleep_wake(dev, 0, 0, 0); |
| 402 | if (ret) |
| 403 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
| 405 | /* Close power resource */ |
| 406 | for (i = 0; i < dev->wakeup.resources.count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 407 | ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | if (ret) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 409 | printk(KERN_ERR PREFIX "Transition power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | dev->wakeup.flags.valid = 0; |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame^] | 411 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | } |
| 414 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 415 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | /* -------------------------------------------------------------------------- |
| 419 | Device Power Management |
| 420 | -------------------------------------------------------------------------- */ |
| 421 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 422 | int acpi_power_get_inferred_state(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 424 | int result = 0; |
| 425 | struct acpi_handle_list *list = NULL; |
| 426 | int list_state = 0; |
| 427 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 431 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | device->power.state = ACPI_STATE_UNKNOWN; |
| 434 | |
| 435 | /* |
| 436 | * We know a device's inferred power state when all the resources |
| 437 | * required for a given D-state are 'on'. |
| 438 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 439 | for (i = ACPI_STATE_D0; i < ACPI_STATE_D3; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | list = &device->power.states[i].resources; |
| 441 | if (list->count < 1) |
| 442 | continue; |
| 443 | |
| 444 | result = acpi_power_get_list_state(list, &list_state); |
| 445 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 446 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
| 448 | if (list_state == ACPI_POWER_RESOURCE_STATE_ON) { |
| 449 | device->power.state = i; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 450 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | } |
| 453 | |
| 454 | device->power.state = ACPI_STATE_D3; |
| 455 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 456 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 459 | int acpi_power_transition(struct acpi_device *device, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 461 | int result = 0; |
| 462 | struct acpi_handle_list *cl = NULL; /* Current Resources */ |
| 463 | struct acpi_handle_list *tl = NULL; /* Target Resources */ |
| 464 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 468 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 470 | if ((device->power.state < ACPI_STATE_D0) |
| 471 | || (device->power.state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 472 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | cl = &device->power.states[device->power.state].resources; |
| 475 | tl = &device->power.states[state].resources; |
| 476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | if (!cl->count && !tl->count) { |
| 478 | result = -ENODEV; |
| 479 | goto end; |
| 480 | } |
| 481 | |
| 482 | /* TBD: Resources must be ordered. */ |
| 483 | |
| 484 | /* |
| 485 | * First we reference all power resources required in the target list |
| 486 | * (e.g. so the device doesn't lose power while transitioning). |
| 487 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 488 | for (i = 0; i < tl->count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 489 | result = acpi_power_on(tl->handles[i], device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (result) |
| 491 | goto end; |
| 492 | } |
| 493 | |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 494 | if (device->power.state == state) { |
| 495 | goto end; |
| 496 | } |
| 497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | /* |
| 499 | * Then we dereference all power resources used in the current list. |
| 500 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | for (i = 0; i < cl->count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 502 | result = acpi_power_off_device(cl->handles[i], device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (result) |
| 504 | goto end; |
| 505 | } |
| 506 | |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 507 | end: |
Miguel Botón | e76d5f7 | 2008-02-04 23:31:19 -0800 | [diff] [blame] | 508 | if (result) |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 509 | device->power.state = ACPI_STATE_UNKNOWN; |
Miguel Botón | e76d5f7 | 2008-02-04 23:31:19 -0800 | [diff] [blame] | 510 | else { |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 511 | /* We shouldn't change the state till all above operations succeed */ |
| 512 | device->power.state = state; |
| 513 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 515 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | } |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | /* -------------------------------------------------------------------------- |
| 519 | FS Interface (/proc) |
| 520 | -------------------------------------------------------------------------- */ |
| 521 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 522 | static struct proc_dir_entry *acpi_power_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | static int acpi_power_seq_show(struct seq_file *seq, void *offset) |
| 525 | { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 526 | int count = 0; |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 527 | int result = 0, state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 529 | struct list_head *node, *next; |
| 530 | struct acpi_power_reference *ref; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 533 | resource = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | if (!resource) |
| 536 | goto end; |
| 537 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 538 | result = acpi_power_get_state(resource, &state); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 539 | if (result) |
| 540 | goto end; |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | seq_puts(seq, "state: "); |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 543 | switch (state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | case ACPI_POWER_RESOURCE_STATE_ON: |
| 545 | seq_puts(seq, "on\n"); |
| 546 | break; |
| 547 | case ACPI_POWER_RESOURCE_STATE_OFF: |
| 548 | seq_puts(seq, "off\n"); |
| 549 | break; |
| 550 | default: |
| 551 | seq_puts(seq, "unknown\n"); |
| 552 | break; |
| 553 | } |
| 554 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 555 | mutex_lock(&resource->resource_lock); |
| 556 | list_for_each_safe(node, next, &resource->reference) { |
| 557 | ref = container_of(node, struct acpi_power_reference, node); |
| 558 | count++; |
| 559 | } |
| 560 | mutex_unlock(&resource->resource_lock); |
| 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | seq_printf(seq, "system level: S%d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 563 | "order: %d\n" |
| 564 | "reference count: %d\n", |
| 565 | resource->system_level, |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 566 | resource->order, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 568 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 569 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | static int acpi_power_open_fs(struct inode *inode, struct file *file) |
| 573 | { |
| 574 | return single_open(file, acpi_power_seq_show, PDE(inode)->data); |
| 575 | } |
| 576 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 577 | static int acpi_power_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 579 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 583 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | if (!acpi_device_dir(device)) { |
| 586 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 587 | acpi_power_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 589 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | /* 'status' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 593 | entry = proc_create_data(ACPI_POWER_FILE_STATUS, |
| 594 | S_IRUGO, acpi_device_dir(device), |
| 595 | &acpi_power_fops, acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 597 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 598 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 601 | static int acpi_power_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | if (acpi_device_dir(device)) { |
| 605 | remove_proc_entry(ACPI_POWER_FILE_STATUS, |
| 606 | acpi_device_dir(device)); |
| 607 | remove_proc_entry(acpi_device_bid(device), acpi_power_dir); |
| 608 | acpi_device_dir(device) = NULL; |
| 609 | } |
| 610 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 611 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | } |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | /* -------------------------------------------------------------------------- |
| 615 | Driver Interface |
| 616 | -------------------------------------------------------------------------- */ |
| 617 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 618 | static int acpi_power_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 620 | int result = 0, state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 621 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | struct acpi_power_resource *resource = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 623 | union acpi_object acpi_object; |
| 624 | struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 628 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 630 | resource = kzalloc(sizeof(struct acpi_power_resource), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | if (!resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 632 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 634 | resource->device = device; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 635 | mutex_init(&resource->resource_lock); |
| 636 | INIT_LIST_HEAD(&resource->reference); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | strcpy(resource->name, device->pnp.bus_id); |
| 638 | strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME); |
| 639 | strcpy(acpi_device_class(device), ACPI_POWER_CLASS); |
| 640 | acpi_driver_data(device) = resource; |
| 641 | |
| 642 | /* Evalute the object to get the system level and resource order. */ |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 643 | status = acpi_evaluate_object(device->handle, NULL, NULL, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | if (ACPI_FAILURE(status)) { |
| 645 | result = -ENODEV; |
| 646 | goto end; |
| 647 | } |
| 648 | resource->system_level = acpi_object.power_resource.system_level; |
| 649 | resource->order = acpi_object.power_resource.resource_order; |
| 650 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 651 | result = acpi_power_get_state(resource, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (result) |
| 653 | goto end; |
| 654 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 655 | switch (state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | case ACPI_POWER_RESOURCE_STATE_ON: |
| 657 | device->power.state = ACPI_STATE_D0; |
| 658 | break; |
| 659 | case ACPI_POWER_RESOURCE_STATE_OFF: |
| 660 | device->power.state = ACPI_STATE_D3; |
| 661 | break; |
| 662 | default: |
| 663 | device->power.state = ACPI_STATE_UNKNOWN; |
| 664 | break; |
| 665 | } |
| 666 | |
| 667 | result = acpi_power_add_fs(device); |
| 668 | if (result) |
| 669 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 671 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device), |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 672 | acpi_device_bid(device), state ? "on" : "off"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 673 | |
| 674 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (result) |
| 676 | kfree(resource); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 677 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 678 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } |
| 680 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 681 | static int acpi_power_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | { |
| 683 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 684 | struct list_head *node, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
| 687 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 688 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 690 | resource = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | |
| 692 | acpi_power_remove_fs(device); |
| 693 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 694 | mutex_lock(&resource->resource_lock); |
| 695 | list_for_each_safe(node, next, &resource->reference) { |
| 696 | struct acpi_power_reference *ref = container_of(node, struct acpi_power_reference, node); |
| 697 | list_del(&ref->node); |
| 698 | kfree(ref); |
| 699 | } |
| 700 | mutex_unlock(&resource->resource_lock); |
| 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | kfree(resource); |
| 703 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 704 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | } |
| 706 | |
Len Brown | e8363f3 | 2007-02-16 02:05:39 -0500 | [diff] [blame] | 707 | static int acpi_power_resume(struct acpi_device *device) |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 708 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 709 | int result = 0, state; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 710 | struct acpi_power_resource *resource = NULL; |
| 711 | struct acpi_power_reference *ref; |
| 712 | |
| 713 | if (!device || !acpi_driver_data(device)) |
| 714 | return -EINVAL; |
| 715 | |
| 716 | resource = (struct acpi_power_resource *)acpi_driver_data(device); |
| 717 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 718 | result = acpi_power_get_state(resource, &state); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 719 | if (result) |
| 720 | return result; |
| 721 | |
| 722 | mutex_lock(&resource->resource_lock); |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 723 | if (state == ACPI_POWER_RESOURCE_STATE_OFF && |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 724 | !list_empty(&resource->reference)) { |
| 725 | ref = container_of(resource->reference.next, struct acpi_power_reference, node); |
| 726 | mutex_unlock(&resource->resource_lock); |
| 727 | result = acpi_power_on(device->handle, ref->device); |
| 728 | return result; |
| 729 | } |
| 730 | |
| 731 | mutex_unlock(&resource->resource_lock); |
| 732 | return 0; |
| 733 | } |
| 734 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 735 | static int __init acpi_power_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 737 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
| 740 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 741 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | INIT_LIST_HEAD(&acpi_power_resource_list); |
| 744 | |
| 745 | acpi_power_dir = proc_mkdir(ACPI_POWER_CLASS, acpi_root_dir); |
| 746 | if (!acpi_power_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 747 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
| 749 | result = acpi_bus_register_driver(&acpi_power_driver); |
| 750 | if (result < 0) { |
| 751 | remove_proc_entry(ACPI_POWER_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 752 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
| 754 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 755 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | subsys_initcall(acpi_power_init); |