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> |
| 34 | #ifdef CONFIG_X86 |
| 35 | #include <asm/mpspec.h> |
| 36 | #endif |
| 37 | #include <acpi/acpi_bus.h> |
| 38 | #include <acpi/acpi_drivers.h> |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 41 | ACPI_MODULE_NAME("bus"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #ifdef CONFIG_X86 |
| 43 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); |
| 44 | #endif |
| 45 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 46 | struct acpi_device *acpi_root; |
| 47 | struct proc_dir_entry *acpi_root_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | EXPORT_SYMBOL(acpi_root_dir); |
| 49 | |
| 50 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
| 51 | |
| 52 | /* -------------------------------------------------------------------------- |
| 53 | Device Management |
| 54 | -------------------------------------------------------------------------- */ |
| 55 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 56 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 58 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 62 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | /* TBD: Support fixed-feature devices */ |
| 65 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 66 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | if (ACPI_FAILURE(status) || !*device) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 68 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 69 | handle)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 70 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 73 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | EXPORT_SYMBOL(acpi_bus_get_device); |
| 77 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 78 | int acpi_bus_get_status(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | acpi_status status = AE_OK; |
| 81 | unsigned long sta = 0; |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 85 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | /* |
| 88 | * Evaluate _STA if present. |
| 89 | */ |
| 90 | if (device->flags.dynamic_status) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 91 | status = |
| 92 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 94 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 95 | STRUCT_TO_INT(device->status) = (int)sta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Otherwise we assume the status of our parent (unless we don't |
| 100 | * have one, in which case status is implied). |
| 101 | */ |
| 102 | else if (device->parent) |
| 103 | device->status = device->parent->status; |
| 104 | else |
Bjorn Helgaas | 0c0e892 | 2007-04-25 14:20:58 -0400 | [diff] [blame] | 105 | STRUCT_TO_INT(device->status) = |
| 106 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | |
| 107 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | if (device->status.functional && !device->status.present) { |
| 110 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | "functional but not present; setting present\n", |
| 112 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | device->status.present = 1; |
| 114 | } |
| 115 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
| 117 | device->pnp.bus_id, |
| 118 | (u32) STRUCT_TO_INT(device->status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 120 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | EXPORT_SYMBOL(acpi_bus_get_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Zhang Rui | 2073393 | 2008-01-17 15:51:21 +0800 | [diff] [blame^] | 125 | void acpi_bus_private_data_handler(acpi_handle handle, |
| 126 | u32 function, void *context) |
| 127 | { |
| 128 | return; |
| 129 | } |
| 130 | EXPORT_SYMBOL(acpi_bus_private_data_handler); |
| 131 | |
| 132 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
| 133 | { |
| 134 | acpi_status status = AE_OK; |
| 135 | |
| 136 | if (!*data) |
| 137 | return -EINVAL; |
| 138 | |
| 139 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); |
| 140 | if (ACPI_FAILURE(status) || !*data) { |
| 141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 142 | handle)); |
| 143 | return -ENODEV; |
| 144 | } |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | EXPORT_SYMBOL(acpi_bus_get_private_data); |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | /* -------------------------------------------------------------------------- |
| 151 | Power Management |
| 152 | -------------------------------------------------------------------------- */ |
| 153 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 154 | int acpi_bus_get_power(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | int result = 0; |
| 157 | acpi_status status = 0; |
| 158 | struct acpi_device *device = NULL; |
| 159 | unsigned long psc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | result = acpi_bus_get_device(handle, &device); |
| 163 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 164 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | *state = ACPI_STATE_UNKNOWN; |
| 167 | |
| 168 | if (!device->flags.power_manageable) { |
| 169 | /* TBD: Non-recursive algorithm for walking up hierarchy */ |
| 170 | if (device->parent) |
| 171 | *state = device->parent->power.state; |
| 172 | else |
| 173 | *state = ACPI_STATE_D0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 174 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | /* |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 176 | * Get the device's power state either directly (via _PSC) or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | * indirectly (via power resources). |
| 178 | */ |
| 179 | if (device->power.flags.explicit_get) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | status = acpi_evaluate_integer(device->handle, "_PSC", |
| 181 | NULL, &psc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 183 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | device->power.state = (int)psc; |
| 185 | } else if (device->power.flags.power_resources) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | result = acpi_power_get_inferred_state(device); |
| 187 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 188 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | *state = device->power.state; |
| 192 | } |
| 193 | |
| 194 | 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] | 195 | device->pnp.bus_id, device->power.state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 197 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | EXPORT_SYMBOL(acpi_bus_get_power); |
| 201 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 202 | int acpi_bus_set_power(acpi_handle handle, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 204 | int result = 0; |
| 205 | acpi_status status = AE_OK; |
| 206 | struct acpi_device *device = NULL; |
| 207 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | result = acpi_bus_get_device(handle, &device); |
| 211 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 212 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 215 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
| 217 | /* Make sure this is a valid target state */ |
| 218 | |
| 219 | if (!device->flags.power_manageable) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 220 | 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] | 221 | kobject_name(&device->dev.kobj))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 222 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 224 | /* |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 225 | * Get device's current power state |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 226 | */ |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 227 | acpi_bus_get_power(device->handle, &device->power.state); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 228 | if ((state == device->power.state) && !device->flags.force_power_state) { |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 229 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| 230 | state)); |
| 231 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | if (!device->power.states[state].flags.valid) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 235 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
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 | } |
| 238 | if (device->parent && (state < device->parent->power.state)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 239 | printk(KERN_WARNING PREFIX |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 240 | "Cannot set device to a higher-powered" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 241 | " state than parent\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 242 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Transition Power |
| 247 | * ---------------- |
| 248 | * On transitions to a high-powered state we first apply power (via |
| 249 | * power resources) then evalute _PSx. Conversly for transitions to |
| 250 | * a lower-powered state. |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 251 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | if (state < device->power.state) { |
| 253 | if (device->power.flags.power_resources) { |
| 254 | result = acpi_power_transition(device, state); |
| 255 | if (result) |
| 256 | goto end; |
| 257 | } |
| 258 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 259 | status = acpi_evaluate_object(device->handle, |
| 260 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (ACPI_FAILURE(status)) { |
| 262 | result = -ENODEV; |
| 263 | goto end; |
| 264 | } |
| 265 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 266 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 268 | status = acpi_evaluate_object(device->handle, |
| 269 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | if (ACPI_FAILURE(status)) { |
| 271 | result = -ENODEV; |
| 272 | goto end; |
| 273 | } |
| 274 | } |
| 275 | if (device->power.flags.power_resources) { |
| 276 | result = acpi_power_transition(device, state); |
| 277 | if (result) |
| 278 | goto end; |
| 279 | } |
| 280 | } |
| 281 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 282 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (result) |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 284 | printk(KERN_WARNING PREFIX |
| 285 | "Transitioning device [%s] to D%d\n", |
| 286 | device->pnp.bus_id, state); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 287 | else { |
| 288 | device->power.state = state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 289 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 290 | "Device [%s] transitioned to D%d\n", |
| 291 | device->pnp.bus_id, state)); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 294 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | EXPORT_SYMBOL(acpi_bus_set_power); |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | /* -------------------------------------------------------------------------- |
| 300 | Event Management |
| 301 | -------------------------------------------------------------------------- */ |
| 302 | |
Len Brown | 14e04fb3 | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 303 | #ifdef CONFIG_ACPI_PROC_EVENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| 305 | |
| 306 | LIST_HEAD(acpi_bus_event_list); |
| 307 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| 308 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 309 | extern int event_is_open; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 311 | 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] | 312 | { |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 313 | struct acpi_bus_event *event; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 314 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /* drop event on the floor if no one's listening */ |
| 317 | if (!event_is_open) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 318 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| 321 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 322 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 324 | strcpy(event->device_class, device_class); |
| 325 | strcpy(event->bus_id, bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | event->type = type; |
| 327 | event->data = data; |
| 328 | |
| 329 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| 330 | list_add_tail(&event->node, &acpi_bus_event_list); |
| 331 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 332 | |
| 333 | wake_up_interruptible(&acpi_bus_event_queue); |
| 334 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 335 | return 0; |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 336 | |
| 337 | } |
| 338 | |
| 339 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); |
| 340 | |
| 341 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
| 342 | { |
| 343 | if (!device) |
| 344 | return -EINVAL; |
| 345 | return acpi_bus_generate_proc_event4(device->pnp.device_class, |
| 346 | device->pnp.bus_id, type, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 348 | |
Len Brown | 14e04fb3 | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 349 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 351 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | unsigned long flags = 0; |
| 354 | struct acpi_bus_event *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | DECLARE_WAITQUEUE(wait, current); |
| 357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
| 359 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 360 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | if (list_empty(&acpi_bus_event_list)) { |
| 363 | |
| 364 | set_current_state(TASK_INTERRUPTIBLE); |
| 365 | add_wait_queue(&acpi_bus_event_queue, &wait); |
| 366 | |
| 367 | if (list_empty(&acpi_bus_event_list)) |
| 368 | schedule(); |
| 369 | |
| 370 | remove_wait_queue(&acpi_bus_event_queue, &wait); |
| 371 | set_current_state(TASK_RUNNING); |
| 372 | |
| 373 | if (signal_pending(current)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 374 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 378 | entry = |
| 379 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | if (entry) |
| 381 | list_del(&entry->node); |
| 382 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 383 | |
| 384 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 385 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| 388 | |
| 389 | kfree(entry); |
| 390 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 391 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 394 | EXPORT_SYMBOL(acpi_bus_receive_event); |
Len Brown | 14e04fb3 | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 395 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
| 397 | /* -------------------------------------------------------------------------- |
| 398 | Notification Handling |
| 399 | -------------------------------------------------------------------------- */ |
| 400 | |
| 401 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 402 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 404 | acpi_status status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | struct acpi_device_status old_status; |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 409 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | if (status_changed) |
| 412 | *status_changed = 0; |
| 413 | |
| 414 | old_status = device->status; |
| 415 | |
| 416 | /* |
| 417 | * Make sure this device's parent is present before we go about |
| 418 | * messing with the device. |
| 419 | */ |
| 420 | if (device->parent && !device->parent->status.present) { |
| 421 | device->status = device->parent->status; |
| 422 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { |
| 423 | if (status_changed) |
| 424 | *status_changed = 1; |
| 425 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 426 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | status = acpi_bus_get_status(device); |
| 430 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 431 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 434 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | if (status_changed) |
| 437 | *status_changed = 1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | /* |
| 440 | * Device Insertion/Removal |
| 441 | */ |
| 442 | if ((device->status.present) && !(old_status.present)) { |
| 443 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| 444 | /* TBD: Handle device insertion */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 445 | } else if (!(device->status.present) && (old_status.present)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| 447 | /* TBD: Handle device removal */ |
| 448 | } |
| 449 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 450 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 453 | static int acpi_bus_check_scope(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | int result = 0; |
| 456 | int status_changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
| 459 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 460 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | /* Status Change? */ |
| 463 | result = acpi_bus_check_device(device, &status_changed); |
| 464 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 465 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | if (!status_changed) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 468 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | /* |
| 471 | * TBD: Enumerate child devices within this device's scope and |
| 472 | * run acpi_bus_check_device()'s on them. |
| 473 | */ |
| 474 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 475 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /** |
| 479 | * acpi_bus_notify |
| 480 | * --------------- |
| 481 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| 482 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 483 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 485 | int result = 0; |
| 486 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | if (acpi_bus_get_device(handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 490 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | switch (type) { |
| 493 | |
| 494 | case ACPI_NOTIFY_BUS_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 495 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 496 | "Received BUS CHECK notification for device [%s]\n", |
| 497 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | result = acpi_bus_check_scope(device); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 499 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | */ |
| 503 | break; |
| 504 | |
| 505 | case ACPI_NOTIFY_DEVICE_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 506 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 507 | "Received DEVICE CHECK notification for device [%s]\n", |
| 508 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | result = acpi_bus_check_device(device, NULL); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 510 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 512 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | */ |
| 514 | break; |
| 515 | |
| 516 | case ACPI_NOTIFY_DEVICE_WAKE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 517 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 518 | "Received DEVICE WAKE notification for device [%s]\n", |
| 519 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | /* TBD */ |
| 521 | break; |
| 522 | |
| 523 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 524 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 525 | "Received EJECT REQUEST notification for device [%s]\n", |
| 526 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* TBD */ |
| 528 | break; |
| 529 | |
| 530 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 531 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 532 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", |
| 533 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | /* TBD: Exactly what does 'light' mean? */ |
| 535 | break; |
| 536 | |
| 537 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 539 | "Received FREQUENCY MISMATCH notification for device [%s]\n", |
| 540 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /* TBD */ |
| 542 | break; |
| 543 | |
| 544 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 545 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 546 | "Received BUS MODE MISMATCH notification for device [%s]\n", |
| 547 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | /* TBD */ |
| 549 | break; |
| 550 | |
| 551 | case ACPI_NOTIFY_POWER_FAULT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 552 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 553 | "Received POWER FAULT notification for device [%s]\n", |
| 554 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | /* TBD */ |
| 556 | break; |
| 557 | |
| 558 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 559 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 560 | "Received unknown/unsupported notification [%08x]\n", |
| 561 | type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | break; |
| 563 | } |
| 564 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 565 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | /* -------------------------------------------------------------------------- |
| 569 | Initialization/Cleanup |
| 570 | -------------------------------------------------------------------------- */ |
| 571 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 572 | static int __init acpi_bus_init_irq(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | acpi_status status = AE_OK; |
| 575 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| 576 | struct acpi_object_list arg_list = { 1, &arg }; |
| 577 | char *message = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 580 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | * Let the system know what interrupt model we are using by |
| 582 | * evaluating the \_PIC object, if exists. |
| 583 | */ |
| 584 | |
| 585 | switch (acpi_irq_model) { |
| 586 | case ACPI_IRQ_MODEL_PIC: |
| 587 | message = "PIC"; |
| 588 | break; |
| 589 | case ACPI_IRQ_MODEL_IOAPIC: |
| 590 | message = "IOAPIC"; |
| 591 | break; |
| 592 | case ACPI_IRQ_MODEL_IOSAPIC: |
| 593 | message = "IOSAPIC"; |
| 594 | break; |
John Keller | 3948ec9 | 2006-12-22 11:50:04 -0600 | [diff] [blame] | 595 | case ACPI_IRQ_MODEL_PLATFORM: |
| 596 | message = "platform specific model"; |
| 597 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | default: |
| 599 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 600 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| 604 | |
| 605 | arg.integer.value = acpi_irq_model; |
| 606 | |
| 607 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| 608 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 609 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 610 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
| 612 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 613 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | } |
| 615 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 616 | acpi_native_uint acpi_gbl_permanent_mmap; |
| 617 | |
| 618 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | void __init acpi_early_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 621 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
| 623 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 624 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 626 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | /* enable workarounds, unless strict ACPI spec. compliance */ |
| 629 | if (!acpi_strict) |
| 630 | acpi_gbl_enable_interpreter_slack = TRUE; |
| 631 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 632 | acpi_gbl_permanent_mmap = 1; |
| 633 | |
| 634 | status = acpi_reallocate_root_table(); |
| 635 | if (ACPI_FAILURE(status)) { |
| 636 | printk(KERN_ERR PREFIX |
| 637 | "Unable to reallocate ACPI tables\n"); |
| 638 | goto error0; |
| 639 | } |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | status = acpi_initialize_subsystem(); |
| 642 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 643 | printk(KERN_ERR PREFIX |
| 644 | "Unable to initialize the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | goto error0; |
| 646 | } |
| 647 | |
| 648 | status = acpi_load_tables(); |
| 649 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 650 | printk(KERN_ERR PREFIX |
| 651 | "Unable to load the System Description Tables\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | goto error0; |
| 653 | } |
| 654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | #ifdef CONFIG_X86 |
| 656 | if (!acpi_ioapic) { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 657 | extern u8 acpi_sci_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | /* compatible (0) means level (3) */ |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 660 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| 661 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| 662 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| 663 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* Set PIC-mode SCI trigger type */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 665 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 666 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } else { |
| 668 | extern int acpi_sci_override_gsi; |
| 669 | /* |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 670 | * now that acpi_gbl_FADT is initialized, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | * update it with result from INT_SRC_OVR parsing |
| 672 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 673 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | } |
| 675 | #endif |
| 676 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 677 | status = |
| 678 | acpi_enable_subsystem(~ |
| 679 | (ACPI_NO_HARDWARE_INIT | |
| 680 | ACPI_NO_ACPI_ENABLE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | if (ACPI_FAILURE(status)) { |
| 682 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| 683 | goto error0; |
| 684 | } |
| 685 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 686 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 688 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | disable_acpi(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 690 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 693 | static int __init acpi_bus_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 695 | int result = 0; |
| 696 | acpi_status status = AE_OK; |
| 697 | extern acpi_status acpi_os_initialize1(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
| 700 | status = acpi_os_initialize1(); |
| 701 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 702 | status = |
| 703 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 705 | printk(KERN_ERR PREFIX |
| 706 | "Unable to start the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | goto error1; |
| 708 | } |
| 709 | |
| 710 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 711 | printk(KERN_ERR PREFIX |
| 712 | "Unable to initialize ACPI OS objects\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | goto error1; |
| 714 | } |
| 715 | #ifdef CONFIG_ACPI_EC |
| 716 | /* |
| 717 | * ACPI 2.0 requires the EC driver to be loaded and work before |
| 718 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| 719 | * is called). |
| 720 | * |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 721 | * This is accomplished by looking for the ECDT table, and getting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | * the EC parameters out of that. |
| 723 | */ |
| 724 | status = acpi_ec_ecdt_probe(); |
| 725 | /* Ignore result. Not having an ECDT is not fatal. */ |
| 726 | #endif |
| 727 | |
| 728 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| 729 | if (ACPI_FAILURE(status)) { |
| 730 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| 731 | goto error1; |
| 732 | } |
| 733 | |
| 734 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| 735 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 736 | /* Initialize sleep structures */ |
| 737 | acpi_sleep_init(); |
| 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | /* |
| 740 | * Get the system interrupt model and evaluate \_PIC. |
| 741 | */ |
| 742 | result = acpi_bus_init_irq(); |
| 743 | if (result) |
| 744 | goto error1; |
| 745 | |
| 746 | /* |
| 747 | * Register the for all standard device notifications. |
| 748 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 749 | status = |
| 750 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| 751 | &acpi_bus_notify, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 753 | printk(KERN_ERR PREFIX |
| 754 | "Unable to register for device notifications\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | goto error1; |
| 756 | } |
| 757 | |
| 758 | /* |
| 759 | * Create the top ACPI proc directory |
| 760 | */ |
| 761 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| 762 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 763 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
| 765 | /* Mimic structured exception handling */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 766 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | acpi_terminate(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 768 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 771 | struct kobject *acpi_kobj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 773 | static int __init acpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 775 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | if (acpi_disabled) { |
| 779 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 780 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
Greg Kroah-Hartman | f62ed9e | 2007-11-05 13:16:15 -0800 | [diff] [blame] | 783 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
Greg Kroah-Hartman | 99e0d2f | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 784 | if (!acpi_kobj) { |
| 785 | printk(KERN_WARNING "%s: kset create error\n", __FUNCTION__); |
| 786 | acpi_kobj = NULL; |
| 787 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
| 789 | result = acpi_bus_init(); |
| 790 | |
| 791 | if (!result) { |
Len Brown | 9f9adec | 2007-12-13 17:38:03 -0500 | [diff] [blame] | 792 | if (!(pm_flags & PM_APM)) |
| 793 | pm_flags |= PM_ACPI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 795 | printk(KERN_INFO PREFIX |
| 796 | "APM is already active, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | disable_acpi(); |
| 798 | result = -ENODEV; |
| 799 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } else |
| 801 | disable_acpi(); |
| 802 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 803 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
| 806 | subsys_initcall(acpi_init); |