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