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 |
Zhao Yakui | f5adfaa | 2008-08-11 14:57:50 +0800 | [diff] [blame] | 57 | |
| 58 | #ifdef MODULE_PARAM_PREFIX |
| 59 | #undef MODULE_PARAM_PREFIX |
| 60 | #endif |
| 61 | #define MODULE_PARAM_PREFIX "acpi." |
| 62 | int acpi_power_nocheck; |
| 63 | module_param_named(power_nocheck, acpi_power_nocheck, bool, 000); |
| 64 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 65 | static int acpi_power_add(struct acpi_device *device); |
| 66 | static int acpi_power_remove(struct acpi_device *device, int type); |
Len Brown | e8363f3 | 2007-02-16 02:05:39 -0500 | [diff] [blame] | 67 | static int acpi_power_resume(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static int acpi_power_open_fs(struct inode *inode, struct file *file); |
| 69 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 70 | static struct acpi_device_id power_device_ids[] = { |
| 71 | {ACPI_POWER_HID, 0}, |
| 72 | {"", 0}, |
| 73 | }; |
| 74 | MODULE_DEVICE_TABLE(acpi, power_device_ids); |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | static struct acpi_driver acpi_power_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 77 | .name = "power", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 78 | .class = ACPI_POWER_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 79 | .ids = power_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | .ops = { |
| 81 | .add = acpi_power_add, |
| 82 | .remove = acpi_power_remove, |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 83 | .resume = acpi_power_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | }; |
| 86 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 87 | struct acpi_power_reference { |
| 88 | struct list_head node; |
| 89 | struct acpi_device *device; |
| 90 | }; |
| 91 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | struct acpi_power_resource { |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 93 | struct acpi_device * device; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | acpi_bus_id name; |
| 95 | u32 system_level; |
| 96 | u32 order; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 97 | struct mutex resource_lock; |
| 98 | struct list_head reference; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | }; |
| 100 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 101 | static struct list_head acpi_power_resource_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 103 | static const struct file_operations acpi_power_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 104 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 105 | .open = acpi_power_open_fs, |
| 106 | .read = seq_read, |
| 107 | .llseek = seq_lseek, |
| 108 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | /* -------------------------------------------------------------------------- |
| 112 | Power Resource Management |
| 113 | -------------------------------------------------------------------------- */ |
| 114 | |
| 115 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | acpi_power_get_context(acpi_handle handle, |
| 117 | struct acpi_power_resource **resource) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | int result = 0; |
| 120 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | if (!resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 124 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | result = acpi_bus_get_device(handle, &device); |
| 127 | if (result) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 128 | printk(KERN_WARNING PREFIX "Getting context [%p]\n", handle); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 129 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 132 | *resource = acpi_driver_data(device); |
Li Zefan | a815ab8 | 2008-04-18 13:27:29 -0700 | [diff] [blame] | 133 | if (!*resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 134 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 136 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 139 | static int acpi_power_get_state(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 141 | acpi_status status = AE_OK; |
| 142 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 145 | if (!handle || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 146 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 148 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 150 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 152 | *state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON: |
| 153 | ACPI_POWER_RESOURCE_STATE_OFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
| 155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n", |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 156 | acpi_ut_get_node_name(handle), state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 158 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 161 | 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] | 162 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 163 | int result = 0, state1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | u32 i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | if (!list || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 168 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* The state of the list is 'on' IFF all resources are 'on'. */ |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 171 | /* */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | for (i = 0; i < list->count; i++) { |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 174 | /* |
| 175 | * The state of the power resource can be obtained by |
| 176 | * using the ACPI handle. In such case it is unnecessary to |
| 177 | * get the Power resource first and then get its state again. |
| 178 | */ |
| 179 | result = acpi_power_get_state(list->handles[i], &state1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | if (result) |
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 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 183 | *state = state1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | if (*state != ACPI_POWER_RESOURCE_STATE_ON) |
| 186 | break; |
| 187 | } |
| 188 | |
| 189 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource list is %s\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 190 | *state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 192 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 195 | static int acpi_power_on(acpi_handle handle, struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 197 | int result = 0, state; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 198 | int found = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 201 | struct list_head *node, *next; |
| 202 | struct acpi_power_reference *ref; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
| 205 | result = acpi_power_get_context(handle, &resource); |
| 206 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 207 | return result; |
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 | mutex_lock(&resource->resource_lock); |
| 210 | list_for_each_safe(node, next, &resource->reference) { |
| 211 | ref = container_of(node, struct acpi_power_reference, node); |
| 212 | if (dev->handle == ref->device->handle) { |
| 213 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] already referenced by resource [%s]\n", |
| 214 | dev->pnp.bus_id, resource->name)); |
| 215 | found = 1; |
| 216 | break; |
| 217 | } |
| 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 220 | if (!found) { |
| 221 | ref = kmalloc(sizeof (struct acpi_power_reference), |
| 222 | irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL); |
| 223 | if (!ref) { |
| 224 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "kmalloc() failed\n")); |
| 225 | mutex_unlock(&resource->resource_lock); |
| 226 | return -ENOMEM; |
| 227 | } |
| 228 | list_add_tail(&ref->node, &resource->reference); |
| 229 | ref->device = dev; |
| 230 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] added to resource [%s] references\n", |
| 231 | dev->pnp.bus_id, resource->name)); |
| 232 | } |
| 233 | mutex_unlock(&resource->resource_lock); |
| 234 | |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 235 | status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 237 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Zhao Yakui | f5adfaa | 2008-08-11 14:57:50 +0800 | [diff] [blame] | 239 | if (!acpi_power_nocheck) { |
| 240 | /* |
| 241 | * If acpi_power_nocheck is set, it is unnecessary to check |
| 242 | * the power state after power transition. |
| 243 | */ |
| 244 | result = acpi_power_get_state(resource->device->handle, |
| 245 | &state); |
| 246 | if (result) |
| 247 | return result; |
| 248 | if (state != ACPI_POWER_RESOURCE_STATE_ON) |
| 249 | return -ENOEXEC; |
| 250 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | /* Update the power resource's _device_ power state */ |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 252 | resource->device->power.state = ACPI_STATE_D0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned on\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 255 | resource->name)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 256 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 259 | 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] | 260 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 261 | int result = 0, state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 264 | struct list_head *node, *next; |
| 265 | struct acpi_power_reference *ref; |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | result = acpi_power_get_context(handle, &resource); |
| 269 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 270 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 272 | mutex_lock(&resource->resource_lock); |
| 273 | list_for_each_safe(node, next, &resource->reference) { |
| 274 | ref = container_of(node, struct acpi_power_reference, node); |
| 275 | if (dev->handle == ref->device->handle) { |
| 276 | list_del(&ref->node); |
| 277 | kfree(ref); |
| 278 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] removed from resource [%s] references\n", |
| 279 | dev->pnp.bus_id, resource->name)); |
| 280 | break; |
| 281 | } |
| 282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 284 | if (!list_empty(&resource->reference)) { |
| 285 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cannot turn resource [%s] off - resource is in use\n", |
| 286 | resource->name)); |
| 287 | mutex_unlock(&resource->resource_lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 288 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 290 | mutex_unlock(&resource->resource_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 292 | status = acpi_evaluate_object(resource->device->handle, "_OFF", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 294 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Zhao Yakui | f5adfaa | 2008-08-11 14:57:50 +0800 | [diff] [blame] | 296 | if (!acpi_power_nocheck) { |
| 297 | /* |
| 298 | * If acpi_power_nocheck is set, it is unnecessary to check |
| 299 | * the power state after power transition. |
| 300 | */ |
| 301 | result = acpi_power_get_state(handle, &state); |
| 302 | if (result) |
| 303 | return result; |
| 304 | if (state != ACPI_POWER_RESOURCE_STATE_OFF) |
| 305 | return -ENOEXEC; |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | /* Update the power resource's _device_ power state */ |
Dmitry Torokhov | 786f18c | 2006-08-23 23:18:06 -0400 | [diff] [blame] | 309 | resource->device->power.state = ACPI_STATE_D3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned off\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 312 | resource->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 314 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 317 | /** |
| 318 | * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in |
| 319 | * ACPI 3.0) _PSW (Power State Wake) |
| 320 | * @dev: Device to handle. |
| 321 | * @enable: 0 - disable, 1 - enable the wake capabilities of the device. |
| 322 | * @sleep_state: Target sleep state of the system. |
| 323 | * @dev_state: Target power state of the device. |
| 324 | * |
| 325 | * Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 326 | * State Wake) for the device, if present. On failure reset the device's |
| 327 | * wakeup.flags.valid flag. |
| 328 | * |
| 329 | * RETURN VALUE: |
| 330 | * 0 if either _DSW or _PSW has been successfully executed |
| 331 | * 0 if neither _DSW nor _PSW has been found |
| 332 | * -ENODEV if the execution of either _DSW or _PSW has failed |
| 333 | */ |
| 334 | int acpi_device_sleep_wake(struct acpi_device *dev, |
| 335 | int enable, int sleep_state, int dev_state) |
| 336 | { |
| 337 | union acpi_object in_arg[3]; |
| 338 | struct acpi_object_list arg_list = { 3, in_arg }; |
| 339 | acpi_status status = AE_OK; |
| 340 | |
| 341 | /* |
| 342 | * Try to execute _DSW first. |
| 343 | * |
| 344 | * Three agruments are needed for the _DSW object: |
| 345 | * Argument 0: enable/disable the wake capabilities |
| 346 | * Argument 1: target system state |
| 347 | * Argument 2: target device state |
| 348 | * When _DSW object is called to disable the wake capabilities, maybe |
| 349 | * the first argument is filled. The values of the other two agruments |
| 350 | * are meaningless. |
| 351 | */ |
| 352 | in_arg[0].type = ACPI_TYPE_INTEGER; |
| 353 | in_arg[0].integer.value = enable; |
| 354 | in_arg[1].type = ACPI_TYPE_INTEGER; |
| 355 | in_arg[1].integer.value = sleep_state; |
| 356 | in_arg[2].type = ACPI_TYPE_INTEGER; |
| 357 | in_arg[2].integer.value = dev_state; |
| 358 | status = acpi_evaluate_object(dev->handle, "_DSW", &arg_list, NULL); |
| 359 | if (ACPI_SUCCESS(status)) { |
| 360 | return 0; |
| 361 | } else if (status != AE_NOT_FOUND) { |
| 362 | printk(KERN_ERR PREFIX "_DSW execution failed\n"); |
| 363 | dev->wakeup.flags.valid = 0; |
| 364 | return -ENODEV; |
| 365 | } |
| 366 | |
| 367 | /* Execute _PSW */ |
| 368 | arg_list.count = 1; |
| 369 | in_arg[0].integer.value = enable; |
| 370 | status = acpi_evaluate_object(dev->handle, "_PSW", &arg_list, NULL); |
| 371 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| 372 | printk(KERN_ERR PREFIX "_PSW execution failed\n"); |
| 373 | dev->wakeup.flags.valid = 0; |
| 374 | return -ENODEV; |
| 375 | } |
| 376 | |
| 377 | return 0; |
| 378 | } |
| 379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | /* |
| 381 | * Prepare a wakeup device, two steps (Ref ACPI 2.0:P229): |
| 382 | * 1. Power on the power resources required for the wakeup device |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 383 | * 2. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 384 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | */ |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 386 | 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] | 387 | { |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 388 | int i, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 391 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 393 | /* |
| 394 | * Do not execute the code below twice in a row without calling |
| 395 | * acpi_disable_wakeup_device_power() in between for the same device |
| 396 | */ |
| 397 | if (dev->wakeup.flags.prepared) |
| 398 | return 0; |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | /* Open power resource */ |
| 401 | for (i = 0; i < dev->wakeup.resources.count; i++) { |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 402 | int ret = acpi_power_on(dev->wakeup.resources.handles[i], dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | if (ret) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 404 | printk(KERN_ERR PREFIX "Transition power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | dev->wakeup.flags.valid = 0; |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 406 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | } |
| 409 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 410 | /* |
| 411 | * Passing 3 as the third argument below means the device may be placed |
| 412 | * in arbitrary power state afterwards. |
| 413 | */ |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 414 | err = acpi_device_sleep_wake(dev, 1, sleep_state, 3); |
| 415 | if (!err) |
| 416 | dev->wakeup.flags.prepared = 1; |
| 417 | |
| 418 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | /* |
| 422 | * Shutdown a wakeup device, counterpart of above method |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 423 | * 1. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 424 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | * 2. Shutdown down the power resources |
| 426 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 427 | int acpi_disable_wakeup_device_power(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 429 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 432 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 434 | /* |
| 435 | * Do not execute the code below twice in a row without calling |
| 436 | * acpi_enable_wakeup_device_power() in between for the same device |
| 437 | */ |
| 438 | if (!dev->wakeup.flags.prepared) |
| 439 | return 0; |
| 440 | |
| 441 | dev->wakeup.flags.prepared = 0; |
| 442 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 443 | ret = acpi_device_sleep_wake(dev, 0, 0, 0); |
| 444 | if (ret) |
| 445 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | /* Close power resource */ |
| 448 | for (i = 0; i < dev->wakeup.resources.count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 449 | ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (ret) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 451 | printk(KERN_ERR PREFIX "Transition power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | dev->wakeup.flags.valid = 0; |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 453 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | } |
| 456 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 457 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* -------------------------------------------------------------------------- |
| 461 | Device Power Management |
| 462 | -------------------------------------------------------------------------- */ |
| 463 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 464 | int acpi_power_get_inferred_state(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 466 | int result = 0; |
| 467 | struct acpi_handle_list *list = NULL; |
| 468 | int list_state = 0; |
| 469 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
| 472 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 473 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
| 475 | device->power.state = ACPI_STATE_UNKNOWN; |
| 476 | |
| 477 | /* |
| 478 | * We know a device's inferred power state when all the resources |
| 479 | * required for a given D-state are 'on'. |
| 480 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 481 | for (i = ACPI_STATE_D0; i < ACPI_STATE_D3; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | list = &device->power.states[i].resources; |
| 483 | if (list->count < 1) |
| 484 | continue; |
| 485 | |
| 486 | result = acpi_power_get_list_state(list, &list_state); |
| 487 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 488 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
| 490 | if (list_state == ACPI_POWER_RESOURCE_STATE_ON) { |
| 491 | device->power.state = i; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 492 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
| 494 | } |
| 495 | |
| 496 | device->power.state = ACPI_STATE_D3; |
| 497 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 498 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | int acpi_power_transition(struct acpi_device *device, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 503 | int result = 0; |
| 504 | struct acpi_handle_list *cl = NULL; /* Current Resources */ |
| 505 | struct acpi_handle_list *tl = NULL; /* Target Resources */ |
| 506 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 510 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 512 | if ((device->power.state < ACPI_STATE_D0) |
| 513 | || (device->power.state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 514 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | cl = &device->power.states[device->power.state].resources; |
| 517 | tl = &device->power.states[state].resources; |
| 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | if (!cl->count && !tl->count) { |
| 520 | result = -ENODEV; |
| 521 | goto end; |
| 522 | } |
| 523 | |
| 524 | /* TBD: Resources must be ordered. */ |
| 525 | |
| 526 | /* |
| 527 | * First we reference all power resources required in the target list |
| 528 | * (e.g. so the device doesn't lose power while transitioning). |
| 529 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 530 | for (i = 0; i < tl->count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 531 | result = acpi_power_on(tl->handles[i], device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (result) |
| 533 | goto end; |
| 534 | } |
| 535 | |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 536 | if (device->power.state == state) { |
| 537 | goto end; |
| 538 | } |
| 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | /* |
| 541 | * Then we dereference all power resources used in the current list. |
| 542 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 543 | for (i = 0; i < cl->count; i++) { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 544 | result = acpi_power_off_device(cl->handles[i], device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | if (result) |
| 546 | goto end; |
| 547 | } |
| 548 | |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 549 | end: |
Miguel Botón | e76d5f7 | 2008-02-04 23:31:19 -0800 | [diff] [blame] | 550 | if (result) |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 551 | device->power.state = ACPI_STATE_UNKNOWN; |
Miguel Botón | e76d5f7 | 2008-02-04 23:31:19 -0800 | [diff] [blame] | 552 | else { |
Konstantin Karasyov | 7292576 | 2007-02-21 02:05:58 -0500 | [diff] [blame] | 553 | /* We shouldn't change the state till all above operations succeed */ |
| 554 | device->power.state = state; |
| 555 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 557 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | } |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | /* -------------------------------------------------------------------------- |
| 561 | FS Interface (/proc) |
| 562 | -------------------------------------------------------------------------- */ |
| 563 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 564 | static struct proc_dir_entry *acpi_power_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | static int acpi_power_seq_show(struct seq_file *seq, void *offset) |
| 567 | { |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 568 | int count = 0; |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 569 | int result = 0, state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 571 | struct list_head *node, *next; |
| 572 | struct acpi_power_reference *ref; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 575 | resource = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | if (!resource) |
| 578 | goto end; |
| 579 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 580 | result = acpi_power_get_state(resource->device->handle, &state); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 581 | if (result) |
| 582 | goto end; |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | seq_puts(seq, "state: "); |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 585 | switch (state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | case ACPI_POWER_RESOURCE_STATE_ON: |
| 587 | seq_puts(seq, "on\n"); |
| 588 | break; |
| 589 | case ACPI_POWER_RESOURCE_STATE_OFF: |
| 590 | seq_puts(seq, "off\n"); |
| 591 | break; |
| 592 | default: |
| 593 | seq_puts(seq, "unknown\n"); |
| 594 | break; |
| 595 | } |
| 596 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 597 | mutex_lock(&resource->resource_lock); |
| 598 | list_for_each_safe(node, next, &resource->reference) { |
| 599 | ref = container_of(node, struct acpi_power_reference, node); |
| 600 | count++; |
| 601 | } |
| 602 | mutex_unlock(&resource->resource_lock); |
| 603 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | seq_printf(seq, "system level: S%d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 605 | "order: %d\n" |
| 606 | "reference count: %d\n", |
| 607 | resource->system_level, |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 608 | resource->order, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 610 | end: |
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 | |
| 614 | static int acpi_power_open_fs(struct inode *inode, struct file *file) |
| 615 | { |
| 616 | return single_open(file, acpi_power_seq_show, PDE(inode)->data); |
| 617 | } |
| 618 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | static int acpi_power_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 621 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
| 624 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 625 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | if (!acpi_device_dir(device)) { |
| 628 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 629 | acpi_power_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 631 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | /* 'status' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 635 | entry = proc_create_data(ACPI_POWER_FILE_STATUS, |
| 636 | S_IRUGO, acpi_device_dir(device), |
| 637 | &acpi_power_fops, acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 639 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 640 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | } |
| 642 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 643 | static int acpi_power_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | if (acpi_device_dir(device)) { |
| 647 | remove_proc_entry(ACPI_POWER_FILE_STATUS, |
| 648 | acpi_device_dir(device)); |
| 649 | remove_proc_entry(acpi_device_bid(device), acpi_power_dir); |
| 650 | acpi_device_dir(device) = NULL; |
| 651 | } |
| 652 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 653 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
| 655 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | /* -------------------------------------------------------------------------- |
| 657 | Driver Interface |
| 658 | -------------------------------------------------------------------------- */ |
| 659 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 660 | static int acpi_power_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 662 | int result = 0, state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 663 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | struct acpi_power_resource *resource = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 665 | union acpi_object acpi_object; |
| 666 | struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
| 669 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 670 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 672 | resource = kzalloc(sizeof(struct acpi_power_resource), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | if (!resource) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 674 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Patrick Mochel | 4159857 | 2006-05-19 16:54:40 -0400 | [diff] [blame] | 676 | resource->device = device; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 677 | mutex_init(&resource->resource_lock); |
| 678 | INIT_LIST_HEAD(&resource->reference); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | strcpy(resource->name, device->pnp.bus_id); |
| 680 | strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME); |
| 681 | strcpy(acpi_device_class(device), ACPI_POWER_CLASS); |
| 682 | acpi_driver_data(device) = resource; |
| 683 | |
| 684 | /* Evalute the object to get the system level and resource order. */ |
Patrick Mochel | 5fbc19e | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 685 | status = acpi_evaluate_object(device->handle, NULL, NULL, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | if (ACPI_FAILURE(status)) { |
| 687 | result = -ENODEV; |
| 688 | goto end; |
| 689 | } |
| 690 | resource->system_level = acpi_object.power_resource.system_level; |
| 691 | resource->order = acpi_object.power_resource.resource_order; |
| 692 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 693 | result = acpi_power_get_state(device->handle, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | if (result) |
| 695 | goto end; |
| 696 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 697 | switch (state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | case ACPI_POWER_RESOURCE_STATE_ON: |
| 699 | device->power.state = ACPI_STATE_D0; |
| 700 | break; |
| 701 | case ACPI_POWER_RESOURCE_STATE_OFF: |
| 702 | device->power.state = ACPI_STATE_D3; |
| 703 | break; |
| 704 | default: |
| 705 | device->power.state = ACPI_STATE_UNKNOWN; |
| 706 | break; |
| 707 | } |
| 708 | |
| 709 | result = acpi_power_add_fs(device); |
| 710 | if (result) |
| 711 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 713 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device), |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 714 | acpi_device_bid(device), state ? "on" : "off"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 715 | |
| 716 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | if (result) |
| 718 | kfree(resource); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 719 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 720 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | } |
| 722 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 723 | static int acpi_power_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
| 725 | struct acpi_power_resource *resource = NULL; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 726 | struct list_head *node, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 730 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 732 | resource = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
| 734 | acpi_power_remove_fs(device); |
| 735 | |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 736 | mutex_lock(&resource->resource_lock); |
| 737 | list_for_each_safe(node, next, &resource->reference) { |
| 738 | struct acpi_power_reference *ref = container_of(node, struct acpi_power_reference, node); |
| 739 | list_del(&ref->node); |
| 740 | kfree(ref); |
| 741 | } |
| 742 | mutex_unlock(&resource->resource_lock); |
| 743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | kfree(resource); |
| 745 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 746 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | |
Len Brown | e8363f3 | 2007-02-16 02:05:39 -0500 | [diff] [blame] | 749 | static int acpi_power_resume(struct acpi_device *device) |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 750 | { |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 751 | int result = 0, state; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 752 | struct acpi_power_resource *resource = NULL; |
| 753 | struct acpi_power_reference *ref; |
| 754 | |
| 755 | if (!device || !acpi_driver_data(device)) |
| 756 | return -EINVAL; |
| 757 | |
| 758 | resource = (struct acpi_power_resource *)acpi_driver_data(device); |
| 759 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 760 | result = acpi_power_get_state(device->handle, &state); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 761 | if (result) |
| 762 | return result; |
| 763 | |
| 764 | mutex_lock(&resource->resource_lock); |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 765 | if (state == ACPI_POWER_RESOURCE_STATE_OFF && |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 766 | !list_empty(&resource->reference)) { |
| 767 | ref = container_of(resource->reference.next, struct acpi_power_reference, node); |
| 768 | mutex_unlock(&resource->resource_lock); |
| 769 | result = acpi_power_on(device->handle, ref->device); |
| 770 | return result; |
| 771 | } |
| 772 | |
| 773 | mutex_unlock(&resource->resource_lock); |
| 774 | return 0; |
| 775 | } |
| 776 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 777 | static int __init acpi_power_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 779 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | |
| 782 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 783 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | INIT_LIST_HEAD(&acpi_power_resource_list); |
| 786 | |
| 787 | acpi_power_dir = proc_mkdir(ACPI_POWER_CLASS, acpi_root_dir); |
| 788 | if (!acpi_power_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 789 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | result = acpi_bus_register_driver(&acpi_power_driver); |
| 792 | if (result < 0) { |
| 793 | remove_proc_entry(ACPI_POWER_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 794 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | } |
| 796 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 797 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | subsys_initcall(acpi_power_init); |