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> |
Len Brown | eb27cae | 2009-07-06 23:40:19 -0400 | [diff] [blame] | 41 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 43 | #include "internal.h" |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 46 | ACPI_MODULE_NAME("bus"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 48 | struct acpi_device *acpi_root; |
| 49 | struct proc_dir_entry *acpi_root_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | EXPORT_SYMBOL(acpi_root_dir); |
| 51 | |
| 52 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
| 53 | |
Zhao Yakui | 6415e12 | 2008-08-11 14:59:59 +0800 | [diff] [blame] | 54 | static int set_power_nocheck(const struct dmi_system_id *id) |
| 55 | { |
| 56 | printk(KERN_NOTICE PREFIX "%s detected - " |
| 57 | "disable power check in power transistion\n", id->ident); |
| 58 | acpi_power_nocheck = 1; |
| 59 | return 0; |
| 60 | } |
| 61 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { |
| 62 | { |
| 63 | set_power_nocheck, "HP Pavilion 05", { |
| 64 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), |
| 65 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), |
| 66 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, |
| 67 | {}, |
| 68 | }; |
| 69 | |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* -------------------------------------------------------------------------- |
| 72 | Device Management |
| 73 | -------------------------------------------------------------------------- */ |
| 74 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 81 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | /* TBD: Support fixed-feature devices */ |
| 84 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (ACPI_FAILURE(status) || !*device) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 87 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 88 | handle)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 89 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 92 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | EXPORT_SYMBOL(acpi_bus_get_device); |
| 96 | |
Bjorn Helgaas | 402ac53 | 2009-09-21 19:30:01 +0000 | [diff] [blame] | 97 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
| 98 | unsigned long long *sta) |
| 99 | { |
| 100 | acpi_status status; |
| 101 | |
| 102 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
| 103 | if (ACPI_SUCCESS(status)) |
| 104 | return AE_OK; |
| 105 | |
| 106 | if (status == AE_NOT_FOUND) { |
| 107 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | |
| 108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; |
| 109 | return AE_OK; |
| 110 | } |
| 111 | return status; |
| 112 | } |
| 113 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | int acpi_bus_get_status(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Bjorn Helgaas | 402ac53 | 2009-09-21 19:30:01 +0000 | [diff] [blame] | 116 | acpi_status status; |
| 117 | unsigned long long sta; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 118 | |
Bjorn Helgaas | 402ac53 | 2009-09-21 19:30:01 +0000 | [diff] [blame] | 119 | status = acpi_bus_get_status_handle(device->handle, &sta); |
| 120 | if (ACPI_FAILURE(status)) |
| 121 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Bjorn Helgaas | 402ac53 | 2009-09-21 19:30:01 +0000 | [diff] [blame] | 123 | STRUCT_TO_INT(device->status) = (int) sta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | if (device->status.functional && !device->status.present) { |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 126 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
| 127 | "functional but not present;\n", |
| 128 | device->pnp.bus_id, |
| 129 | (u32) STRUCT_TO_INT(device->status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
| 133 | device->pnp.bus_id, |
| 134 | (u32) STRUCT_TO_INT(device->status))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 135 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | EXPORT_SYMBOL(acpi_bus_get_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Zhang Rui | 2073393 | 2008-01-17 15:51:21 +0800 | [diff] [blame] | 139 | void acpi_bus_private_data_handler(acpi_handle handle, |
Bob Moore | 8e4319c | 2009-06-29 13:43:27 +0800 | [diff] [blame] | 140 | void *context) |
Zhang Rui | 2073393 | 2008-01-17 15:51:21 +0800 | [diff] [blame] | 141 | { |
| 142 | return; |
| 143 | } |
| 144 | EXPORT_SYMBOL(acpi_bus_private_data_handler); |
| 145 | |
| 146 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
| 147 | { |
| 148 | acpi_status status = AE_OK; |
| 149 | |
| 150 | if (!*data) |
| 151 | return -EINVAL; |
| 152 | |
| 153 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); |
| 154 | if (ACPI_FAILURE(status) || !*data) { |
| 155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 156 | handle)); |
| 157 | return -ENODEV; |
| 158 | } |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | EXPORT_SYMBOL(acpi_bus_get_private_data); |
| 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | /* -------------------------------------------------------------------------- |
| 165 | Power Management |
| 166 | -------------------------------------------------------------------------- */ |
| 167 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 168 | int acpi_bus_get_power(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 170 | int result = 0; |
| 171 | acpi_status status = 0; |
| 172 | struct acpi_device *device = NULL; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 173 | unsigned long long psc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | result = acpi_bus_get_device(handle, &device); |
| 177 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 178 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | *state = ACPI_STATE_UNKNOWN; |
| 181 | |
| 182 | if (!device->flags.power_manageable) { |
| 183 | /* TBD: Non-recursive algorithm for walking up hierarchy */ |
| 184 | if (device->parent) |
| 185 | *state = device->parent->power.state; |
| 186 | else |
| 187 | *state = ACPI_STATE_D0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 188 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 190 | * Get the device's power state either directly (via _PSC) or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | * indirectly (via power resources). |
| 192 | */ |
| 193 | if (device->power.flags.explicit_get) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 194 | status = acpi_evaluate_integer(device->handle, "_PSC", |
| 195 | NULL, &psc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 197 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | device->power.state = (int)psc; |
| 199 | } else if (device->power.flags.power_resources) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | result = acpi_power_get_inferred_state(device); |
| 201 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 202 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | *state = device->power.state; |
| 206 | } |
| 207 | |
| 208 | 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] | 209 | device->pnp.bus_id, device->power.state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 211 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | EXPORT_SYMBOL(acpi_bus_get_power); |
| 215 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 216 | int acpi_bus_set_power(acpi_handle handle, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 218 | int result = 0; |
| 219 | acpi_status status = AE_OK; |
| 220 | struct acpi_device *device = NULL; |
| 221 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
| 224 | result = acpi_bus_get_device(handle, &device); |
| 225 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 226 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
| 228 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 229 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
| 231 | /* Make sure this is a valid target state */ |
| 232 | |
| 233 | if (!device->flags.power_manageable) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 234 | 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] | 235 | kobject_name(&device->dev.kobj))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 236 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 238 | /* |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 239 | * Get device's current power state |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 240 | */ |
Zhao Yakui | f5adfaa | 2008-08-11 14:57:50 +0800 | [diff] [blame] | 241 | if (!acpi_power_nocheck) { |
| 242 | /* |
| 243 | * Maybe the incorrect power state is returned on the bogus |
| 244 | * bios, which is different with the real power state. |
| 245 | * For example: the bios returns D0 state and the real power |
| 246 | * state is D3. OS expects to set the device to D0 state. In |
| 247 | * such case if OS uses the power state returned by the BIOS, |
| 248 | * the device can't be transisted to the correct power state. |
| 249 | * So if the acpi_power_nocheck is set, it is unnecessary to |
| 250 | * get the power state by calling acpi_bus_get_power. |
| 251 | */ |
| 252 | acpi_bus_get_power(device->handle, &device->power.state); |
| 253 | } |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 254 | if ((state == device->power.state) && !device->flags.force_power_state) { |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 255 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| 256 | state)); |
| 257 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | if (!device->power.states[state].flags.valid) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 261 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 262 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | if (device->parent && (state < device->parent->power.state)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 265 | printk(KERN_WARNING PREFIX |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 266 | "Cannot set device to a higher-powered" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 267 | " state than parent\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 268 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | /* |
| 272 | * Transition Power |
| 273 | * ---------------- |
| 274 | * On transitions to a high-powered state we first apply power (via |
| 275 | * power resources) then evalute _PSx. Conversly for transitions to |
| 276 | * a lower-powered state. |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 277 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | if (state < device->power.state) { |
| 279 | if (device->power.flags.power_resources) { |
| 280 | result = acpi_power_transition(device, state); |
| 281 | if (result) |
| 282 | goto end; |
| 283 | } |
| 284 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 285 | status = acpi_evaluate_object(device->handle, |
| 286 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | if (ACPI_FAILURE(status)) { |
| 288 | result = -ENODEV; |
| 289 | goto end; |
| 290 | } |
| 291 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 292 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | status = acpi_evaluate_object(device->handle, |
| 295 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | if (ACPI_FAILURE(status)) { |
| 297 | result = -ENODEV; |
| 298 | goto end; |
| 299 | } |
| 300 | } |
| 301 | if (device->power.flags.power_resources) { |
| 302 | result = acpi_power_transition(device, state); |
| 303 | if (result) |
| 304 | goto end; |
| 305 | } |
| 306 | } |
| 307 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 308 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (result) |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 310 | printk(KERN_WARNING PREFIX |
Len Brown | ddc50b6 | 2009-05-08 00:07:30 -0400 | [diff] [blame] | 311 | "Device [%s] failed to transition to D%d\n", |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 312 | device->pnp.bus_id, state); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 313 | else { |
| 314 | device->power.state = state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 316 | "Device [%s] transitioned to D%d\n", |
| 317 | device->pnp.bus_id, state)); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 320 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | EXPORT_SYMBOL(acpi_bus_set_power); |
| 324 | |
Rafael J. Wysocki | 3737b2b | 2008-07-07 03:30:55 +0200 | [diff] [blame] | 325 | bool acpi_bus_power_manageable(acpi_handle handle) |
| 326 | { |
| 327 | struct acpi_device *device; |
| 328 | int result; |
| 329 | |
| 330 | result = acpi_bus_get_device(handle, &device); |
| 331 | return result ? false : device->flags.power_manageable; |
| 332 | } |
| 333 | |
| 334 | EXPORT_SYMBOL(acpi_bus_power_manageable); |
| 335 | |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 336 | bool acpi_bus_can_wakeup(acpi_handle handle) |
| 337 | { |
| 338 | struct acpi_device *device; |
| 339 | int result; |
| 340 | |
| 341 | result = acpi_bus_get_device(handle, &device); |
| 342 | return result ? false : device->wakeup.flags.valid; |
| 343 | } |
| 344 | |
| 345 | EXPORT_SYMBOL(acpi_bus_can_wakeup); |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | /* -------------------------------------------------------------------------- |
| 348 | Event Management |
| 349 | -------------------------------------------------------------------------- */ |
| 350 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 351 | #ifdef CONFIG_ACPI_PROC_EVENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| 353 | |
| 354 | LIST_HEAD(acpi_bus_event_list); |
| 355 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| 356 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 357 | extern int event_is_open; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 359 | 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] | 360 | { |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 361 | struct acpi_bus_event *event; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 362 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | /* drop event on the floor if no one's listening */ |
| 365 | if (!event_is_open) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 366 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
| 368 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| 369 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 370 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 372 | strcpy(event->device_class, device_class); |
| 373 | strcpy(event->bus_id, bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | event->type = type; |
| 375 | event->data = data; |
| 376 | |
| 377 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| 378 | list_add_tail(&event->node, &acpi_bus_event_list); |
| 379 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 380 | |
| 381 | wake_up_interruptible(&acpi_bus_event_queue); |
| 382 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 383 | return 0; |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 384 | |
| 385 | } |
| 386 | |
| 387 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); |
| 388 | |
| 389 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
| 390 | { |
| 391 | if (!device) |
| 392 | return -EINVAL; |
| 393 | return acpi_bus_generate_proc_event4(device->pnp.device_class, |
| 394 | device->pnp.bus_id, type, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 396 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 397 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 399 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 401 | unsigned long flags = 0; |
| 402 | struct acpi_bus_event *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | DECLARE_WAITQUEUE(wait, current); |
| 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 408 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | if (list_empty(&acpi_bus_event_list)) { |
| 411 | |
| 412 | set_current_state(TASK_INTERRUPTIBLE); |
| 413 | add_wait_queue(&acpi_bus_event_queue, &wait); |
| 414 | |
| 415 | if (list_empty(&acpi_bus_event_list)) |
| 416 | schedule(); |
| 417 | |
| 418 | remove_wait_queue(&acpi_bus_event_queue, &wait); |
| 419 | set_current_state(TASK_RUNNING); |
| 420 | |
| 421 | if (signal_pending(current)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 422 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
Chuck Ebbert | f0a37e0 | 2008-04-15 14:34:47 -0700 | [diff] [blame] | 426 | if (!list_empty(&acpi_bus_event_list)) { |
| 427 | entry = list_entry(acpi_bus_event_list.next, |
| 428 | struct acpi_bus_event, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | list_del(&entry->node); |
Chuck Ebbert | f0a37e0 | 2008-04-15 14:34:47 -0700 | [diff] [blame] | 430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 432 | |
| 433 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 434 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| 437 | |
| 438 | kfree(entry); |
| 439 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 440 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 443 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | /* -------------------------------------------------------------------------- |
| 446 | Notification Handling |
| 447 | -------------------------------------------------------------------------- */ |
| 448 | |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 449 | static void acpi_bus_check_device(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | { |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 451 | struct acpi_device *device; |
Bjorn Helgaas | cdd5b8c | 2009-05-22 11:43:51 -0600 | [diff] [blame] | 452 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | struct acpi_device_status old_status; |
| 454 | |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 455 | if (acpi_bus_get_device(handle, &device)) |
| 456 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (!device) |
Bjorn Helgaas | cdd5b8c | 2009-05-22 11:43:51 -0600 | [diff] [blame] | 458 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | old_status = device->status; |
| 461 | |
| 462 | /* |
| 463 | * Make sure this device's parent is present before we go about |
| 464 | * messing with the device. |
| 465 | */ |
| 466 | if (device->parent && !device->parent->status.present) { |
| 467 | device->status = device->parent->status; |
Bjorn Helgaas | cdd5b8c | 2009-05-22 11:43:51 -0600 | [diff] [blame] | 468 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | status = acpi_bus_get_status(device); |
| 472 | if (ACPI_FAILURE(status)) |
Bjorn Helgaas | cdd5b8c | 2009-05-22 11:43:51 -0600 | [diff] [blame] | 473 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
| 475 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
Bjorn Helgaas | cdd5b8c | 2009-05-22 11:43:51 -0600 | [diff] [blame] | 476 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /* |
| 479 | * Device Insertion/Removal |
| 480 | */ |
| 481 | if ((device->status.present) && !(old_status.present)) { |
| 482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| 483 | /* TBD: Handle device insertion */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 484 | } else if (!(device->status.present) && (old_status.present)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| 486 | /* TBD: Handle device removal */ |
| 487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
| 489 | |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 490 | static void acpi_bus_check_scope(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | /* Status Change? */ |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 493 | acpi_bus_check_device(handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | /* |
| 496 | * TBD: Enumerate child devices within this device's scope and |
| 497 | * run acpi_bus_check_device()'s on them. |
| 498 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 501 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
| 502 | int register_acpi_bus_notifier(struct notifier_block *nb) |
| 503 | { |
| 504 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); |
| 505 | } |
| 506 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); |
| 507 | |
| 508 | void unregister_acpi_bus_notifier(struct notifier_block *nb) |
| 509 | { |
| 510 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); |
| 511 | } |
| 512 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); |
| 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | /** |
| 515 | * acpi_bus_notify |
| 516 | * --------------- |
| 517 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| 518 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 519 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 521 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 6d27813 | 2009-04-30 09:35:37 -0600 | [diff] [blame] | 522 | struct acpi_driver *driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Bjorn Helgaas | 02c37bd | 2009-05-22 11:43:41 -0600 | [diff] [blame] | 524 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
| 525 | type, handle)); |
| 526 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 527 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
| 528 | type, (void *)handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | switch (type) { |
| 531 | |
| 532 | case ACPI_NOTIFY_BUS_CHECK: |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 533 | acpi_bus_check_scope(handle); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 534 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 536 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | */ |
| 538 | break; |
| 539 | |
| 540 | case ACPI_NOTIFY_DEVICE_CHECK: |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 541 | acpi_bus_check_device(handle); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 542 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 544 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | */ |
| 546 | break; |
| 547 | |
| 548 | case ACPI_NOTIFY_DEVICE_WAKE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | /* TBD */ |
| 550 | break; |
| 551 | |
| 552 | case ACPI_NOTIFY_EJECT_REQUEST: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | /* TBD */ |
| 554 | break; |
| 555 | |
| 556 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | /* TBD: Exactly what does 'light' mean? */ |
| 558 | break; |
| 559 | |
| 560 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | /* TBD */ |
| 562 | break; |
| 563 | |
| 564 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | /* TBD */ |
| 566 | break; |
| 567 | |
| 568 | case ACPI_NOTIFY_POWER_FAULT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | /* TBD */ |
| 570 | break; |
| 571 | |
| 572 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 573 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 574 | "Received unknown/unsupported notification [%08x]\n", |
| 575 | type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | break; |
| 577 | } |
| 578 | |
Bjorn Helgaas | ff754e2 | 2009-05-22 11:43:56 -0600 | [diff] [blame] | 579 | acpi_bus_get_device(handle, &device); |
| 580 | if (device) { |
| 581 | driver = device->driver; |
| 582 | if (driver && driver->ops.notify && |
| 583 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) |
| 584 | driver->ops.notify(device, type); |
| 585 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | /* -------------------------------------------------------------------------- |
| 589 | Initialization/Cleanup |
| 590 | -------------------------------------------------------------------------- */ |
| 591 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 592 | static int __init acpi_bus_init_irq(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 594 | acpi_status status = AE_OK; |
| 595 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| 596 | struct acpi_object_list arg_list = { 1, &arg }; |
| 597 | char *message = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 600 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | * Let the system know what interrupt model we are using by |
| 602 | * evaluating the \_PIC object, if exists. |
| 603 | */ |
| 604 | |
| 605 | switch (acpi_irq_model) { |
| 606 | case ACPI_IRQ_MODEL_PIC: |
| 607 | message = "PIC"; |
| 608 | break; |
| 609 | case ACPI_IRQ_MODEL_IOAPIC: |
| 610 | message = "IOAPIC"; |
| 611 | break; |
| 612 | case ACPI_IRQ_MODEL_IOSAPIC: |
| 613 | message = "IOSAPIC"; |
| 614 | break; |
John Keller | 3948ec9 | 2006-12-22 11:50:04 -0600 | [diff] [blame] | 615 | case ACPI_IRQ_MODEL_PLATFORM: |
| 616 | message = "platform specific model"; |
| 617 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | default: |
| 619 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 620 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| 624 | |
| 625 | arg.integer.value = acpi_irq_model; |
| 626 | |
| 627 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| 628 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 629 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 630 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | } |
| 632 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 633 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | } |
| 635 | |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 636 | u8 acpi_gbl_permanent_mmap; |
Alexey Starikovskiy | ad71860 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 637 | |
| 638 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 639 | void __init acpi_early_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 641 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 644 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
Bob Moore | 6168612 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 646 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| 647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | /* enable workarounds, unless strict ACPI spec. compliance */ |
| 649 | if (!acpi_strict) |
| 650 | acpi_gbl_enable_interpreter_slack = TRUE; |
| 651 | |
Alexey Starikovskiy | ad71860 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 652 | acpi_gbl_permanent_mmap = 1; |
| 653 | |
| 654 | status = acpi_reallocate_root_table(); |
| 655 | if (ACPI_FAILURE(status)) { |
| 656 | printk(KERN_ERR PREFIX |
| 657 | "Unable to reallocate ACPI tables\n"); |
| 658 | goto error0; |
| 659 | } |
| 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | status = acpi_initialize_subsystem(); |
| 662 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 663 | printk(KERN_ERR PREFIX |
| 664 | "Unable to initialize the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | goto error0; |
| 666 | } |
| 667 | |
| 668 | status = acpi_load_tables(); |
| 669 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 670 | printk(KERN_ERR PREFIX |
| 671 | "Unable to load the System Description Tables\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | goto error0; |
| 673 | } |
| 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | #ifdef CONFIG_X86 |
| 676 | if (!acpi_ioapic) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | /* compatible (0) means level (3) */ |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 678 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| 679 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| 680 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| 681 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | /* Set PIC-mode SCI trigger type */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 683 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 684 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | /* |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 687 | * now that acpi_gbl_FADT is initialized, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | * update it with result from INT_SRC_OVR parsing |
| 689 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 690 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | #endif |
| 693 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 694 | status = |
| 695 | acpi_enable_subsystem(~ |
| 696 | (ACPI_NO_HARDWARE_INIT | |
| 697 | ACPI_NO_ACPI_ENABLE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | if (ACPI_FAILURE(status)) { |
| 699 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| 700 | goto error0; |
| 701 | } |
| 702 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 703 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 705 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | disable_acpi(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 707 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
| 709 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 710 | static int __init acpi_bus_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 712 | int result = 0; |
| 713 | acpi_status status = AE_OK; |
| 714 | extern acpi_status acpi_os_initialize1(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Jiri Slaby | 176f9c1 | 2009-03-04 11:55:27 -0800 | [diff] [blame] | 716 | acpi_os_initialize1(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 718 | status = |
| 719 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 721 | printk(KERN_ERR PREFIX |
| 722 | "Unable to start the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | goto error1; |
| 724 | } |
| 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | /* |
| 727 | * ACPI 2.0 requires the EC driver to be loaded and work before |
| 728 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| 729 | * is called). |
| 730 | * |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 731 | * This is accomplished by looking for the ECDT table, and getting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | * the EC parameters out of that. |
| 733 | */ |
| 734 | status = acpi_ec_ecdt_probe(); |
| 735 | /* Ignore result. Not having an ECDT is not fatal. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| 738 | if (ACPI_FAILURE(status)) { |
| 739 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| 740 | goto error1; |
| 741 | } |
| 742 | |
Zhao Yakui | 455c879 | 2008-10-06 10:31:36 +0800 | [diff] [blame] | 743 | /* |
| 744 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it |
| 745 | * is necessary to enable it as early as possible. |
| 746 | */ |
| 747 | acpi_boot_ec_enable(); |
| 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| 750 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 751 | /* Initialize sleep structures */ |
| 752 | acpi_sleep_init(); |
| 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | /* |
| 755 | * Get the system interrupt model and evaluate \_PIC. |
| 756 | */ |
| 757 | result = acpi_bus_init_irq(); |
| 758 | if (result) |
| 759 | goto error1; |
| 760 | |
| 761 | /* |
| 762 | * Register the for all standard device notifications. |
| 763 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 764 | status = |
| 765 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| 766 | &acpi_bus_notify, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 768 | printk(KERN_ERR PREFIX |
| 769 | "Unable to register for device notifications\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | goto error1; |
| 771 | } |
| 772 | |
| 773 | /* |
| 774 | * Create the top ACPI proc directory |
| 775 | */ |
| 776 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| 777 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 778 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | /* Mimic structured exception handling */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 781 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | acpi_terminate(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 783 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 786 | struct kobject *acpi_kobj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 788 | static int __init acpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 790 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | if (acpi_disabled) { |
| 794 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 795 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
| 797 | |
Greg Kroah-Hartman | f62ed9e | 2007-11-05 13:16:15 -0800 | [diff] [blame] | 798 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 799 | if (!acpi_kobj) { |
Harvey Harrison | 96b2dd1 | 2008-03-05 18:24:51 -0800 | [diff] [blame] | 800 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 801 | acpi_kobj = NULL; |
| 802 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
Bjorn Helgaas | 0e46517 | 2009-03-24 16:50:09 -0600 | [diff] [blame] | 804 | init_acpi_device_notify(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | result = acpi_bus_init(); |
| 806 | |
| 807 | if (!result) { |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 808 | pci_mmcfg_late_init(); |
Len Brown | 9f9adec | 2007-12-13 17:38:03 -0500 | [diff] [blame] | 809 | if (!(pm_flags & PM_APM)) |
| 810 | pm_flags |= PM_ACPI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 812 | printk(KERN_INFO PREFIX |
| 813 | "APM is already active, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | disable_acpi(); |
| 815 | result = -ENODEV; |
| 816 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } else |
| 818 | disable_acpi(); |
Bjorn Helgaas | 81d0273 | 2009-03-24 16:49:38 -0600 | [diff] [blame] | 819 | |
| 820 | if (acpi_disabled) |
| 821 | return result; |
| 822 | |
Zhao Yakui | 6415e12 | 2008-08-11 14:59:59 +0800 | [diff] [blame] | 823 | /* |
| 824 | * If the laptop falls into the DMI check table, the power state check |
| 825 | * will be disabled in the course of device power transistion. |
| 826 | */ |
| 827 | dmi_check_system(power_nocheck_dmi_table); |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 828 | |
| 829 | acpi_scan_init(); |
Bjorn Helgaas | a5f820f | 2009-03-24 16:49:48 -0600 | [diff] [blame] | 830 | acpi_ec_init(); |
Bjorn Helgaas | 4451537 | 2009-03-24 16:49:53 -0600 | [diff] [blame] | 831 | acpi_power_init(); |
Bjorn Helgaas | 141a0af | 2009-03-24 16:49:58 -0600 | [diff] [blame] | 832 | acpi_system_init(); |
Bjorn Helgaas | 84f810c | 2009-03-24 16:50:03 -0600 | [diff] [blame] | 833 | acpi_debug_init(); |
Bjorn Helgaas | 9cee43e | 2009-03-24 16:50:14 -0600 | [diff] [blame] | 834 | acpi_sleep_proc_init(); |
Bjorn Helgaas | 201b8c6 | 2009-03-24 16:50:19 -0600 | [diff] [blame] | 835 | acpi_wakeup_device_init(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 836 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | subsys_initcall(acpi_init); |