Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or (at |
| 11 | * your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/ioport.h> |
Randy Dunlap | d568df8 | 2006-07-12 01:47:00 -0400 | [diff] [blame] | 28 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/list.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/pm.h> |
| 32 | #include <linux/device.h> |
| 33 | #include <linux/proc_fs.h> |
Harvey Harrison | 6697c05 | 2008-02-09 23:24:08 +0100 | [diff] [blame] | 34 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #ifdef CONFIG_X86 |
| 36 | #include <asm/mpspec.h> |
| 37 | #endif |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 38 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <acpi/acpi_bus.h> |
| 40 | #include <acpi/acpi_drivers.h> |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 43 | ACPI_MODULE_NAME("bus"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 45 | struct acpi_device *acpi_root; |
| 46 | struct proc_dir_entry *acpi_root_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | EXPORT_SYMBOL(acpi_root_dir); |
| 48 | |
| 49 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
| 50 | |
| 51 | /* -------------------------------------------------------------------------- |
| 52 | Device Management |
| 53 | -------------------------------------------------------------------------- */ |
| 54 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 55 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 61 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | /* TBD: Support fixed-feature devices */ |
| 64 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 65 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | if (ACPI_FAILURE(status) || !*device) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 67 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 68 | handle)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 69 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } |
| 71 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 72 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | EXPORT_SYMBOL(acpi_bus_get_device); |
| 76 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | int acpi_bus_get_status(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | acpi_status status = AE_OK; |
| 80 | unsigned long sta = 0; |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 84 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | /* |
| 87 | * Evaluate _STA if present. |
| 88 | */ |
| 89 | if (device->flags.dynamic_status) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 90 | status = |
| 91 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 93 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | STRUCT_TO_INT(device->status) = (int)sta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Otherwise we assume the status of our parent (unless we don't |
| 99 | * have one, in which case status is implied). |
| 100 | */ |
| 101 | else if (device->parent) |
| 102 | device->status = device->parent->status; |
| 103 | else |
Bjorn Helgaas | 0c0e892 | 2007-04-25 14:20:58 -0400 | [diff] [blame] | 104 | STRUCT_TO_INT(device->status) = |
| 105 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | |
| 106 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | if (device->status.functional && !device->status.present) { |
| 109 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | "functional but not present; setting present\n", |
| 111 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | device->status.present = 1; |
| 113 | } |
| 114 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
| 116 | device->pnp.bus_id, |
| 117 | (u32) STRUCT_TO_INT(device->status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 119 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | EXPORT_SYMBOL(acpi_bus_get_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Zhang Rui | 2073393 | 2008-01-17 15:51:21 +0800 | [diff] [blame] | 124 | void acpi_bus_private_data_handler(acpi_handle handle, |
| 125 | u32 function, void *context) |
| 126 | { |
| 127 | return; |
| 128 | } |
| 129 | EXPORT_SYMBOL(acpi_bus_private_data_handler); |
| 130 | |
| 131 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
| 132 | { |
| 133 | acpi_status status = AE_OK; |
| 134 | |
| 135 | if (!*data) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); |
| 139 | if (ACPI_FAILURE(status) || !*data) { |
| 140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 141 | handle)); |
| 142 | return -ENODEV; |
| 143 | } |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | EXPORT_SYMBOL(acpi_bus_get_private_data); |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* -------------------------------------------------------------------------- |
| 150 | Power Management |
| 151 | -------------------------------------------------------------------------- */ |
| 152 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | int acpi_bus_get_power(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | int result = 0; |
| 156 | acpi_status status = 0; |
| 157 | struct acpi_device *device = NULL; |
| 158 | unsigned long psc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
| 161 | result = acpi_bus_get_device(handle, &device); |
| 162 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 163 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | *state = ACPI_STATE_UNKNOWN; |
| 166 | |
| 167 | if (!device->flags.power_manageable) { |
| 168 | /* TBD: Non-recursive algorithm for walking up hierarchy */ |
| 169 | if (device->parent) |
| 170 | *state = device->parent->power.state; |
| 171 | else |
| 172 | *state = ACPI_STATE_D0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 175 | * Get the device's power state either directly (via _PSC) or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | * indirectly (via power resources). |
| 177 | */ |
| 178 | if (device->power.flags.explicit_get) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 179 | status = acpi_evaluate_integer(device->handle, "_PSC", |
| 180 | NULL, &psc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 182 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | device->power.state = (int)psc; |
| 184 | } else if (device->power.flags.power_resources) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | result = acpi_power_get_inferred_state(device); |
| 186 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 187 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | *state = device->power.state; |
| 191 | } |
| 192 | |
| 193 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 194 | device->pnp.bus_id, device->power.state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 196 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | EXPORT_SYMBOL(acpi_bus_get_power); |
| 200 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | int acpi_bus_set_power(acpi_handle handle, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 203 | int result = 0; |
| 204 | acpi_status status = AE_OK; |
| 205 | struct acpi_device *device = NULL; |
| 206 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | result = acpi_bus_get_device(handle, &device); |
| 210 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 211 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 214 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | /* Make sure this is a valid target state */ |
| 217 | |
| 218 | if (!device->flags.power_manageable) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 219 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
Greg Kroah-Hartman | 19c38de | 2007-09-12 15:06:57 -0700 | [diff] [blame] | 220 | kobject_name(&device->dev.kobj))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 221 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 223 | /* |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 224 | * Get device's current power state |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 225 | */ |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 226 | acpi_bus_get_power(device->handle, &device->power.state); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 227 | if ((state == device->power.state) && !device->flags.force_power_state) { |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 228 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| 229 | state)); |
| 230 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if (!device->power.states[state].flags.valid) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 234 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 235 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | } |
| 237 | if (device->parent && (state < device->parent->power.state)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 238 | printk(KERN_WARNING PREFIX |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 239 | "Cannot set device to a higher-powered" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 240 | " state than parent\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 241 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Transition Power |
| 246 | * ---------------- |
| 247 | * On transitions to a high-powered state we first apply power (via |
| 248 | * power resources) then evalute _PSx. Conversly for transitions to |
| 249 | * a lower-powered state. |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 250 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (state < device->power.state) { |
| 252 | if (device->power.flags.power_resources) { |
| 253 | result = acpi_power_transition(device, state); |
| 254 | if (result) |
| 255 | goto end; |
| 256 | } |
| 257 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 258 | status = acpi_evaluate_object(device->handle, |
| 259 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | if (ACPI_FAILURE(status)) { |
| 261 | result = -ENODEV; |
| 262 | goto end; |
| 263 | } |
| 264 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 267 | status = acpi_evaluate_object(device->handle, |
| 268 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (ACPI_FAILURE(status)) { |
| 270 | result = -ENODEV; |
| 271 | goto end; |
| 272 | } |
| 273 | } |
| 274 | if (device->power.flags.power_resources) { |
| 275 | result = acpi_power_transition(device, state); |
| 276 | if (result) |
| 277 | goto end; |
| 278 | } |
| 279 | } |
| 280 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 281 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (result) |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 283 | printk(KERN_WARNING PREFIX |
| 284 | "Transitioning device [%s] to D%d\n", |
| 285 | device->pnp.bus_id, state); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 286 | else { |
| 287 | device->power.state = state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 288 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 289 | "Device [%s] transitioned to D%d\n", |
| 290 | device->pnp.bus_id, state)); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 293 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | EXPORT_SYMBOL(acpi_bus_set_power); |
| 297 | |
Rafael J. Wysocki | 3737b2b | 2008-07-07 03:30:55 +0200 | [diff] [blame] | 298 | bool acpi_bus_power_manageable(acpi_handle handle) |
| 299 | { |
| 300 | struct acpi_device *device; |
| 301 | int result; |
| 302 | |
| 303 | result = acpi_bus_get_device(handle, &device); |
| 304 | return result ? false : device->flags.power_manageable; |
| 305 | } |
| 306 | |
| 307 | EXPORT_SYMBOL(acpi_bus_power_manageable); |
| 308 | |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 309 | bool acpi_bus_can_wakeup(acpi_handle handle) |
| 310 | { |
| 311 | struct acpi_device *device; |
| 312 | int result; |
| 313 | |
| 314 | result = acpi_bus_get_device(handle, &device); |
| 315 | return result ? false : device->wakeup.flags.valid; |
| 316 | } |
| 317 | |
| 318 | EXPORT_SYMBOL(acpi_bus_can_wakeup); |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | /* -------------------------------------------------------------------------- |
| 321 | Event Management |
| 322 | -------------------------------------------------------------------------- */ |
| 323 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 324 | #ifdef CONFIG_ACPI_PROC_EVENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| 326 | |
| 327 | LIST_HEAD(acpi_bus_event_list); |
| 328 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| 329 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | extern int event_is_open; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 332 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 334 | struct acpi_bus_event *event; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 335 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | /* drop event on the floor if no one's listening */ |
| 338 | if (!event_is_open) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 339 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| 342 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 343 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 345 | strcpy(event->device_class, device_class); |
| 346 | strcpy(event->bus_id, bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | event->type = type; |
| 348 | event->data = data; |
| 349 | |
| 350 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| 351 | list_add_tail(&event->node, &acpi_bus_event_list); |
| 352 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 353 | |
| 354 | wake_up_interruptible(&acpi_bus_event_queue); |
| 355 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 356 | return 0; |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 357 | |
| 358 | } |
| 359 | |
| 360 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); |
| 361 | |
| 362 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
| 363 | { |
| 364 | if (!device) |
| 365 | return -EINVAL; |
| 366 | return acpi_bus_generate_proc_event4(device->pnp.device_class, |
| 367 | device->pnp.bus_id, type, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 369 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 370 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 372 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 374 | unsigned long flags = 0; |
| 375 | struct acpi_bus_event *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | DECLARE_WAITQUEUE(wait, current); |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 381 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | if (list_empty(&acpi_bus_event_list)) { |
| 384 | |
| 385 | set_current_state(TASK_INTERRUPTIBLE); |
| 386 | add_wait_queue(&acpi_bus_event_queue, &wait); |
| 387 | |
| 388 | if (list_empty(&acpi_bus_event_list)) |
| 389 | schedule(); |
| 390 | |
| 391 | remove_wait_queue(&acpi_bus_event_queue, &wait); |
| 392 | set_current_state(TASK_RUNNING); |
| 393 | |
| 394 | if (signal_pending(current)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 395 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
Chuck Ebbert | f0a37e0 | 2008-04-15 14:34:47 -0700 | [diff] [blame] | 399 | if (!list_empty(&acpi_bus_event_list)) { |
| 400 | entry = list_entry(acpi_bus_event_list.next, |
| 401 | struct acpi_bus_event, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | list_del(&entry->node); |
Chuck Ebbert | f0a37e0 | 2008-04-15 14:34:47 -0700 | [diff] [blame] | 403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 405 | |
| 406 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 407 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
| 409 | memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| 410 | |
| 411 | kfree(entry); |
| 412 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 413 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 416 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | /* -------------------------------------------------------------------------- |
| 419 | Notification Handling |
| 420 | -------------------------------------------------------------------------- */ |
| 421 | |
| 422 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 423 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 425 | acpi_status status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | struct acpi_device_status old_status; |
| 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
| 429 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 430 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
| 432 | if (status_changed) |
| 433 | *status_changed = 0; |
| 434 | |
| 435 | old_status = device->status; |
| 436 | |
| 437 | /* |
| 438 | * Make sure this device's parent is present before we go about |
| 439 | * messing with the device. |
| 440 | */ |
| 441 | if (device->parent && !device->parent->status.present) { |
| 442 | device->status = device->parent->status; |
| 443 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { |
| 444 | if (status_changed) |
| 445 | *status_changed = 1; |
| 446 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 447 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | status = acpi_bus_get_status(device); |
| 451 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 452 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
| 454 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 455 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | if (status_changed) |
| 458 | *status_changed = 1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | /* |
| 461 | * Device Insertion/Removal |
| 462 | */ |
| 463 | if ((device->status.present) && !(old_status.present)) { |
| 464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| 465 | /* TBD: Handle device insertion */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 466 | } else if (!(device->status.present) && (old_status.present)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| 468 | /* TBD: Handle device removal */ |
| 469 | } |
| 470 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 471 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 474 | static int acpi_bus_check_scope(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 476 | int result = 0; |
| 477 | int status_changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 481 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | /* Status Change? */ |
| 484 | result = acpi_bus_check_device(device, &status_changed); |
| 485 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 486 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | if (!status_changed) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 489 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | /* |
| 492 | * TBD: Enumerate child devices within this device's scope and |
| 493 | * run acpi_bus_check_device()'s on them. |
| 494 | */ |
| 495 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 496 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame^] | 499 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
| 500 | int register_acpi_bus_notifier(struct notifier_block *nb) |
| 501 | { |
| 502 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); |
| 503 | } |
| 504 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); |
| 505 | |
| 506 | void unregister_acpi_bus_notifier(struct notifier_block *nb) |
| 507 | { |
| 508 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); |
| 509 | } |
| 510 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | /** |
| 513 | * acpi_bus_notify |
| 514 | * --------------- |
| 515 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| 516 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 517 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 519 | int result = 0; |
| 520 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame^] | 522 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
| 523 | type, (void *)handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | if (acpi_bus_get_device(handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 526 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | switch (type) { |
| 529 | |
| 530 | case ACPI_NOTIFY_BUS_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 531 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 532 | "Received BUS CHECK notification for device [%s]\n", |
| 533 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | result = acpi_bus_check_scope(device); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 535 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 537 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | */ |
| 539 | break; |
| 540 | |
| 541 | case ACPI_NOTIFY_DEVICE_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 542 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 543 | "Received DEVICE CHECK notification for device [%s]\n", |
| 544 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | result = acpi_bus_check_device(device, NULL); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 546 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 548 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | */ |
| 550 | break; |
| 551 | |
| 552 | case ACPI_NOTIFY_DEVICE_WAKE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 553 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 554 | "Received DEVICE WAKE notification for device [%s]\n", |
| 555 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | /* TBD */ |
| 557 | break; |
| 558 | |
| 559 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 560 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 561 | "Received EJECT REQUEST notification for device [%s]\n", |
| 562 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | /* TBD */ |
| 564 | break; |
| 565 | |
| 566 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 567 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 568 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", |
| 569 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | /* TBD: Exactly what does 'light' mean? */ |
| 571 | break; |
| 572 | |
| 573 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 575 | "Received FREQUENCY MISMATCH notification for device [%s]\n", |
| 576 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | /* TBD */ |
| 578 | break; |
| 579 | |
| 580 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 582 | "Received BUS MODE MISMATCH notification for device [%s]\n", |
| 583 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | /* TBD */ |
| 585 | break; |
| 586 | |
| 587 | case ACPI_NOTIFY_POWER_FAULT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 588 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 589 | "Received POWER FAULT notification for device [%s]\n", |
| 590 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /* TBD */ |
| 592 | break; |
| 593 | |
| 594 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 595 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 596 | "Received unknown/unsupported notification [%08x]\n", |
| 597 | type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | break; |
| 599 | } |
| 600 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 601 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | /* -------------------------------------------------------------------------- |
| 605 | Initialization/Cleanup |
| 606 | -------------------------------------------------------------------------- */ |
| 607 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 608 | static int __init acpi_bus_init_irq(void) |
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 | acpi_status status = AE_OK; |
| 611 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| 612 | struct acpi_object_list arg_list = { 1, &arg }; |
| 613 | char *message = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 616 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | * Let the system know what interrupt model we are using by |
| 618 | * evaluating the \_PIC object, if exists. |
| 619 | */ |
| 620 | |
| 621 | switch (acpi_irq_model) { |
| 622 | case ACPI_IRQ_MODEL_PIC: |
| 623 | message = "PIC"; |
| 624 | break; |
| 625 | case ACPI_IRQ_MODEL_IOAPIC: |
| 626 | message = "IOAPIC"; |
| 627 | break; |
| 628 | case ACPI_IRQ_MODEL_IOSAPIC: |
| 629 | message = "IOSAPIC"; |
| 630 | break; |
John Keller | 3948ec9 | 2006-12-22 11:50:04 -0600 | [diff] [blame] | 631 | case ACPI_IRQ_MODEL_PLATFORM: |
| 632 | message = "platform specific model"; |
| 633 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | default: |
| 635 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 636 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| 640 | |
| 641 | arg.integer.value = acpi_irq_model; |
| 642 | |
| 643 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| 644 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 645 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 646 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | } |
| 648 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 649 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
| 651 | |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 652 | u8 acpi_gbl_permanent_mmap; |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 653 | |
| 654 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 655 | void __init acpi_early_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 657 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 660 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 662 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* enable workarounds, unless strict ACPI spec. compliance */ |
| 665 | if (!acpi_strict) |
| 666 | acpi_gbl_enable_interpreter_slack = TRUE; |
| 667 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 668 | acpi_gbl_permanent_mmap = 1; |
| 669 | |
| 670 | status = acpi_reallocate_root_table(); |
| 671 | if (ACPI_FAILURE(status)) { |
| 672 | printk(KERN_ERR PREFIX |
| 673 | "Unable to reallocate ACPI tables\n"); |
| 674 | goto error0; |
| 675 | } |
| 676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | status = acpi_initialize_subsystem(); |
| 678 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 679 | printk(KERN_ERR PREFIX |
| 680 | "Unable to initialize the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | goto error0; |
| 682 | } |
| 683 | |
| 684 | status = acpi_load_tables(); |
| 685 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 686 | printk(KERN_ERR PREFIX |
| 687 | "Unable to load the System Description Tables\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | goto error0; |
| 689 | } |
| 690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | #ifdef CONFIG_X86 |
| 692 | if (!acpi_ioapic) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | /* compatible (0) means level (3) */ |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 694 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| 695 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| 696 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| 697 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* Set PIC-mode SCI trigger type */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 699 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 700 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | /* |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 703 | * now that acpi_gbl_FADT is initialized, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | * update it with result from INT_SRC_OVR parsing |
| 705 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 706 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | #endif |
| 709 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 710 | status = |
| 711 | acpi_enable_subsystem(~ |
| 712 | (ACPI_NO_HARDWARE_INIT | |
| 713 | ACPI_NO_ACPI_ENABLE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | if (ACPI_FAILURE(status)) { |
| 715 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| 716 | goto error0; |
| 717 | } |
| 718 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 719 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 721 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | disable_acpi(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 723 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
| 725 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 726 | static int __init acpi_bus_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 728 | int result = 0; |
| 729 | acpi_status status = AE_OK; |
| 730 | extern acpi_status acpi_os_initialize1(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
| 733 | status = acpi_os_initialize1(); |
| 734 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 735 | status = |
| 736 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 738 | printk(KERN_ERR PREFIX |
| 739 | "Unable to start the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | goto error1; |
| 741 | } |
| 742 | |
| 743 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 744 | printk(KERN_ERR PREFIX |
| 745 | "Unable to initialize ACPI OS objects\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | goto error1; |
| 747 | } |
| 748 | #ifdef CONFIG_ACPI_EC |
| 749 | /* |
| 750 | * ACPI 2.0 requires the EC driver to be loaded and work before |
| 751 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| 752 | * is called). |
| 753 | * |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 754 | * This is accomplished by looking for the ECDT table, and getting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | * the EC parameters out of that. |
| 756 | */ |
| 757 | status = acpi_ec_ecdt_probe(); |
| 758 | /* Ignore result. Not having an ECDT is not fatal. */ |
| 759 | #endif |
| 760 | |
| 761 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| 762 | if (ACPI_FAILURE(status)) { |
| 763 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| 764 | goto error1; |
| 765 | } |
| 766 | |
| 767 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| 768 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 769 | /* Initialize sleep structures */ |
| 770 | acpi_sleep_init(); |
| 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | /* |
| 773 | * Get the system interrupt model and evaluate \_PIC. |
| 774 | */ |
| 775 | result = acpi_bus_init_irq(); |
| 776 | if (result) |
| 777 | goto error1; |
| 778 | |
| 779 | /* |
| 780 | * Register the for all standard device notifications. |
| 781 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 782 | status = |
| 783 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| 784 | &acpi_bus_notify, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 786 | printk(KERN_ERR PREFIX |
| 787 | "Unable to register for device notifications\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | goto error1; |
| 789 | } |
| 790 | |
| 791 | /* |
| 792 | * Create the top ACPI proc directory |
| 793 | */ |
| 794 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| 795 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 796 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | /* Mimic structured exception handling */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 799 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | acpi_terminate(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 801 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 804 | struct kobject *acpi_kobj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 806 | static int __init acpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 808 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | if (acpi_disabled) { |
| 812 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 813 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | } |
| 815 | |
Greg Kroah-Hartman | f62ed9e | 2007-11-05 13:16:15 -0800 | [diff] [blame] | 816 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 817 | if (!acpi_kobj) { |
Harvey Harrison | 96b2dd1 | 2008-03-05 18:24:51 -0800 | [diff] [blame] | 818 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 819 | acpi_kobj = NULL; |
| 820 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | result = acpi_bus_init(); |
| 823 | |
| 824 | if (!result) { |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 825 | pci_mmcfg_late_init(); |
Len Brown | 9f9adec | 2007-12-13 17:38:03 -0500 | [diff] [blame] | 826 | if (!(pm_flags & PM_APM)) |
| 827 | pm_flags |= PM_ACPI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 829 | printk(KERN_INFO PREFIX |
| 830 | "APM is already active, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | disable_acpi(); |
| 832 | result = -ENODEV; |
| 833 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | } else |
| 835 | disable_acpi(); |
| 836 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 837 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | subsys_initcall(acpi_init); |