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> |
Jeff Garzik | bca73e4 | 2005-11-13 16:06:25 -0800 | [diff] [blame] | 32 | #include <linux/pm_legacy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/device.h> |
| 34 | #include <linux/proc_fs.h> |
| 35 | #ifdef CONFIG_X86 |
| 36 | #include <asm/mpspec.h> |
| 37 | #endif |
| 38 | #include <acpi/acpi_bus.h> |
| 39 | #include <acpi/acpi_drivers.h> |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 42 | ACPI_MODULE_NAME("bus"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #ifdef CONFIG_X86 |
| 44 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); |
| 45 | #endif |
| 46 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 47 | struct acpi_device *acpi_root; |
| 48 | struct proc_dir_entry *acpi_root_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | EXPORT_SYMBOL(acpi_root_dir); |
| 50 | |
| 51 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
| 52 | |
| 53 | /* -------------------------------------------------------------------------- |
| 54 | Device Management |
| 55 | -------------------------------------------------------------------------- */ |
| 56 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 59 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 63 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | /* TBD: Support fixed-feature devices */ |
| 66 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | if (ACPI_FAILURE(status) || !*device) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 69 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 70 | handle)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 71 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | } |
| 73 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 74 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | EXPORT_SYMBOL(acpi_bus_get_device); |
| 78 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | int acpi_bus_get_status(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | acpi_status status = AE_OK; |
| 82 | unsigned long sta = 0; |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 86 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | * Evaluate _STA if present. |
| 90 | */ |
| 91 | if (device->flags.dynamic_status) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | status = |
| 93 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 95 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | STRUCT_TO_INT(device->status) = (int)sta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Otherwise we assume the status of our parent (unless we don't |
| 101 | * have one, in which case status is implied). |
| 102 | */ |
| 103 | else if (device->parent) |
| 104 | device->status = device->parent->status; |
| 105 | else |
Bjorn Helgaas | 0c0e892 | 2007-04-25 14:20:58 -0400 | [diff] [blame] | 106 | STRUCT_TO_INT(device->status) = |
| 107 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | |
| 108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
| 110 | if (device->status.functional && !device->status.present) { |
| 111 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | "functional but not present; setting present\n", |
| 113 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | device->status.present = 1; |
| 115 | } |
| 116 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
| 118 | device->pnp.bus_id, |
| 119 | (u32) STRUCT_TO_INT(device->status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 121 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | EXPORT_SYMBOL(acpi_bus_get_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | /* -------------------------------------------------------------------------- |
| 127 | Power Management |
| 128 | -------------------------------------------------------------------------- */ |
| 129 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 130 | int acpi_bus_get_power(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 132 | int result = 0; |
| 133 | acpi_status status = 0; |
| 134 | struct acpi_device *device = NULL; |
| 135 | unsigned long psc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | result = acpi_bus_get_device(handle, &device); |
| 139 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 140 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | *state = ACPI_STATE_UNKNOWN; |
| 143 | |
| 144 | if (!device->flags.power_manageable) { |
| 145 | /* TBD: Non-recursive algorithm for walking up hierarchy */ |
| 146 | if (device->parent) |
| 147 | *state = device->parent->power.state; |
| 148 | else |
| 149 | *state = ACPI_STATE_D0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | /* |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 152 | * Get the device's power state either directly (via _PSC) or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | * indirectly (via power resources). |
| 154 | */ |
| 155 | if (device->power.flags.explicit_get) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | status = acpi_evaluate_integer(device->handle, "_PSC", |
| 157 | NULL, &psc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 159 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | device->power.state = (int)psc; |
| 161 | } else if (device->power.flags.power_resources) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | result = acpi_power_get_inferred_state(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 | |
| 167 | *state = device->power.state; |
| 168 | } |
| 169 | |
| 170 | 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] | 171 | device->pnp.bus_id, device->power.state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 173 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | EXPORT_SYMBOL(acpi_bus_get_power); |
| 177 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | int acpi_bus_set_power(acpi_handle handle, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | int result = 0; |
| 181 | acpi_status status = AE_OK; |
| 182 | struct acpi_device *device = NULL; |
| 183 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | result = acpi_bus_get_device(handle, &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 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 191 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | /* Make sure this is a valid target state */ |
| 194 | |
| 195 | if (!device->flags.power_manageable) { |
Len Brown | 9805cb7 | 2006-07-25 13:30:57 -0400 | [diff] [blame] | 196 | 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] | 197 | kobject_name(&device->dev.kobj))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 198 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 200 | /* |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 201 | * Get device's current power state |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 202 | */ |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 203 | acpi_bus_get_power(device->handle, &device->power.state); |
Alexey Starikovskiy | 93ad7c0 | 2007-10-22 14:19:21 +0400 | [diff] [blame] | 204 | if (state == device->power.state) { |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 205 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| 206 | state)); |
| 207 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | if (!device->power.states[state].flags.valid) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 211 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 212 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | if (device->parent && (state < device->parent->power.state)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 215 | printk(KERN_WARNING PREFIX |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 216 | "Cannot set device to a higher-powered" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 217 | " state than parent\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 218 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | /* |
| 222 | * Transition Power |
| 223 | * ---------------- |
| 224 | * On transitions to a high-powered state we first apply power (via |
| 225 | * power resources) then evalute _PSx. Conversly for transitions to |
| 226 | * a lower-powered state. |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 227 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | if (state < device->power.state) { |
| 229 | if (device->power.flags.power_resources) { |
| 230 | result = acpi_power_transition(device, state); |
| 231 | if (result) |
| 232 | goto end; |
| 233 | } |
| 234 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 235 | status = acpi_evaluate_object(device->handle, |
| 236 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (ACPI_FAILURE(status)) { |
| 238 | result = -ENODEV; |
| 239 | goto end; |
| 240 | } |
| 241 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 242 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | status = acpi_evaluate_object(device->handle, |
| 245 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (ACPI_FAILURE(status)) { |
| 247 | result = -ENODEV; |
| 248 | goto end; |
| 249 | } |
| 250 | } |
| 251 | if (device->power.flags.power_resources) { |
| 252 | result = acpi_power_transition(device, state); |
| 253 | if (result) |
| 254 | goto end; |
| 255 | } |
| 256 | } |
| 257 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 258 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (result) |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 260 | printk(KERN_WARNING PREFIX |
| 261 | "Transitioning device [%s] to D%d\n", |
| 262 | device->pnp.bus_id, state); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 263 | else { |
| 264 | device->power.state = state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 266 | "Device [%s] transitioned to D%d\n", |
| 267 | device->pnp.bus_id, state)); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 270 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | EXPORT_SYMBOL(acpi_bus_set_power); |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* -------------------------------------------------------------------------- |
| 276 | Event Management |
| 277 | -------------------------------------------------------------------------- */ |
| 278 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 279 | #ifdef CONFIG_ACPI_PROC_EVENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| 281 | |
| 282 | LIST_HEAD(acpi_bus_event_list); |
| 283 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| 284 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 285 | extern int event_is_open; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 287 | 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] | 288 | { |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 289 | struct acpi_bus_event *event; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | /* drop event on the floor if no one's listening */ |
| 293 | if (!event_is_open) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 294 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
| 296 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| 297 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 298 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 300 | strcpy(event->device_class, device_class); |
| 301 | strcpy(event->bus_id, bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | event->type = type; |
| 303 | event->data = data; |
| 304 | |
| 305 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| 306 | list_add_tail(&event->node, &acpi_bus_event_list); |
| 307 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 308 | |
| 309 | wake_up_interruptible(&acpi_bus_event_queue); |
| 310 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 311 | return 0; |
Alexey Starikovskiy | 8db85d4 | 2007-09-26 19:43:16 +0400 | [diff] [blame] | 312 | |
| 313 | } |
| 314 | |
| 315 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); |
| 316 | |
| 317 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
| 318 | { |
| 319 | if (!device) |
| 320 | return -EINVAL; |
| 321 | return acpi_bus_generate_proc_event4(device->pnp.device_class, |
| 322 | device->pnp.bus_id, type, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 324 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 325 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 327 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | unsigned long flags = 0; |
| 330 | struct acpi_bus_event *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
| 332 | DECLARE_WAITQUEUE(wait, current); |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
| 335 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 336 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | if (list_empty(&acpi_bus_event_list)) { |
| 339 | |
| 340 | set_current_state(TASK_INTERRUPTIBLE); |
| 341 | add_wait_queue(&acpi_bus_event_queue, &wait); |
| 342 | |
| 343 | if (list_empty(&acpi_bus_event_list)) |
| 344 | schedule(); |
| 345 | |
| 346 | remove_wait_queue(&acpi_bus_event_queue, &wait); |
| 347 | set_current_state(TASK_RUNNING); |
| 348 | |
| 349 | if (signal_pending(current)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 350 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 354 | entry = |
| 355 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | if (entry) |
| 357 | list_del(&entry->node); |
| 358 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 359 | |
| 360 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 361 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| 364 | |
| 365 | kfree(entry); |
| 366 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 367 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 370 | EXPORT_SYMBOL(acpi_bus_receive_event); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 371 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | /* -------------------------------------------------------------------------- |
| 374 | Notification Handling |
| 375 | -------------------------------------------------------------------------- */ |
| 376 | |
| 377 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 378 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 380 | acpi_status status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | struct acpi_device_status old_status; |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
| 384 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 385 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | if (status_changed) |
| 388 | *status_changed = 0; |
| 389 | |
| 390 | old_status = device->status; |
| 391 | |
| 392 | /* |
| 393 | * Make sure this device's parent is present before we go about |
| 394 | * messing with the device. |
| 395 | */ |
| 396 | if (device->parent && !device->parent->status.present) { |
| 397 | device->status = device->parent->status; |
| 398 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { |
| 399 | if (status_changed) |
| 400 | *status_changed = 1; |
| 401 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 402 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | status = acpi_bus_get_status(device); |
| 406 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 407 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
| 409 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 410 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | if (status_changed) |
| 413 | *status_changed = 1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | /* |
| 416 | * Device Insertion/Removal |
| 417 | */ |
| 418 | if ((device->status.present) && !(old_status.present)) { |
| 419 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| 420 | /* TBD: Handle device insertion */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 421 | } else if (!(device->status.present) && (old_status.present)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| 423 | /* TBD: Handle device removal */ |
| 424 | } |
| 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 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 429 | static int acpi_bus_check_scope(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | int result = 0; |
| 432 | int status_changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 436 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
| 438 | /* Status Change? */ |
| 439 | result = acpi_bus_check_device(device, &status_changed); |
| 440 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 441 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | if (!status_changed) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 444 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | /* |
| 447 | * TBD: Enumerate child devices within this device's scope and |
| 448 | * run acpi_bus_check_device()'s on them. |
| 449 | */ |
| 450 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 451 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | /** |
| 455 | * acpi_bus_notify |
| 456 | * --------------- |
| 457 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| 458 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 459 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 461 | int result = 0; |
| 462 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
| 465 | if (acpi_bus_get_device(handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 466 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | switch (type) { |
| 469 | |
| 470 | case ACPI_NOTIFY_BUS_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 471 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 472 | "Received BUS CHECK notification for device [%s]\n", |
| 473 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | result = acpi_bus_check_scope(device); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 475 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 477 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | */ |
| 479 | break; |
| 480 | |
| 481 | case ACPI_NOTIFY_DEVICE_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 483 | "Received DEVICE CHECK notification for device [%s]\n", |
| 484 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | result = acpi_bus_check_device(device, NULL); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 486 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 488 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | */ |
| 490 | break; |
| 491 | |
| 492 | case ACPI_NOTIFY_DEVICE_WAKE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 494 | "Received DEVICE WAKE notification for device [%s]\n", |
| 495 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | /* TBD */ |
| 497 | break; |
| 498 | |
| 499 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 500 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 501 | "Received EJECT REQUEST notification for device [%s]\n", |
| 502 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | /* TBD */ |
| 504 | break; |
| 505 | |
| 506 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 508 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", |
| 509 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | /* TBD: Exactly what does 'light' mean? */ |
| 511 | break; |
| 512 | |
| 513 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 514 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 515 | "Received FREQUENCY MISMATCH notification for device [%s]\n", |
| 516 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | /* TBD */ |
| 518 | break; |
| 519 | |
| 520 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 522 | "Received BUS MODE MISMATCH notification for device [%s]\n", |
| 523 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | /* TBD */ |
| 525 | break; |
| 526 | |
| 527 | case ACPI_NOTIFY_POWER_FAULT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 528 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 529 | "Received POWER FAULT notification for device [%s]\n", |
| 530 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | /* TBD */ |
| 532 | break; |
| 533 | |
| 534 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 536 | "Received unknown/unsupported notification [%08x]\n", |
| 537 | type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | break; |
| 539 | } |
| 540 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 541 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | /* -------------------------------------------------------------------------- |
| 545 | Initialization/Cleanup |
| 546 | -------------------------------------------------------------------------- */ |
| 547 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 548 | static int __init acpi_bus_init_irq(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 550 | acpi_status status = AE_OK; |
| 551 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| 552 | struct acpi_object_list arg_list = { 1, &arg }; |
| 553 | char *message = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 556 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | * Let the system know what interrupt model we are using by |
| 558 | * evaluating the \_PIC object, if exists. |
| 559 | */ |
| 560 | |
| 561 | switch (acpi_irq_model) { |
| 562 | case ACPI_IRQ_MODEL_PIC: |
| 563 | message = "PIC"; |
| 564 | break; |
| 565 | case ACPI_IRQ_MODEL_IOAPIC: |
| 566 | message = "IOAPIC"; |
| 567 | break; |
| 568 | case ACPI_IRQ_MODEL_IOSAPIC: |
| 569 | message = "IOSAPIC"; |
| 570 | break; |
John Keller | 3948ec9 | 2006-12-22 11:50:04 -0600 | [diff] [blame] | 571 | case ACPI_IRQ_MODEL_PLATFORM: |
| 572 | message = "platform specific model"; |
| 573 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | default: |
| 575 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 576 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| 580 | |
| 581 | arg.integer.value = acpi_irq_model; |
| 582 | |
| 583 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| 584 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 585 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 586 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 589 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 592 | acpi_native_uint acpi_gbl_permanent_mmap; |
| 593 | |
| 594 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 595 | void __init acpi_early_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 597 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 600 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 602 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| 603 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | /* enable workarounds, unless strict ACPI spec. compliance */ |
| 605 | if (!acpi_strict) |
| 606 | acpi_gbl_enable_interpreter_slack = TRUE; |
| 607 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 608 | acpi_gbl_permanent_mmap = 1; |
| 609 | |
| 610 | status = acpi_reallocate_root_table(); |
| 611 | if (ACPI_FAILURE(status)) { |
| 612 | printk(KERN_ERR PREFIX |
| 613 | "Unable to reallocate ACPI tables\n"); |
| 614 | goto error0; |
| 615 | } |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | status = acpi_initialize_subsystem(); |
| 618 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | printk(KERN_ERR PREFIX |
| 620 | "Unable to initialize the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | goto error0; |
| 622 | } |
| 623 | |
| 624 | status = acpi_load_tables(); |
| 625 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 626 | printk(KERN_ERR PREFIX |
| 627 | "Unable to load the System Description Tables\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | goto error0; |
| 629 | } |
| 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | #ifdef CONFIG_X86 |
| 632 | if (!acpi_ioapic) { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 633 | extern u8 acpi_sci_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
| 635 | /* compatible (0) means level (3) */ |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 636 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| 637 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| 638 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| 639 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | /* Set PIC-mode SCI trigger type */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 641 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 642 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } else { |
| 644 | extern int acpi_sci_override_gsi; |
| 645 | /* |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 646 | * now that acpi_gbl_FADT is initialized, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | * update it with result from INT_SRC_OVR parsing |
| 648 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 649 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
| 651 | #endif |
| 652 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 653 | status = |
| 654 | acpi_enable_subsystem(~ |
| 655 | (ACPI_NO_HARDWARE_INIT | |
| 656 | ACPI_NO_ACPI_ENABLE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | if (ACPI_FAILURE(status)) { |
| 658 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| 659 | goto error0; |
| 660 | } |
| 661 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 662 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 664 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | disable_acpi(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 666 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 669 | static int __init acpi_bus_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 671 | int result = 0; |
| 672 | acpi_status status = AE_OK; |
| 673 | extern acpi_status acpi_os_initialize1(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | status = acpi_os_initialize1(); |
| 677 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 678 | status = |
| 679 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 681 | printk(KERN_ERR PREFIX |
| 682 | "Unable to start the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | goto error1; |
| 684 | } |
| 685 | |
| 686 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 687 | printk(KERN_ERR PREFIX |
| 688 | "Unable to initialize ACPI OS objects\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | goto error1; |
| 690 | } |
| 691 | #ifdef CONFIG_ACPI_EC |
| 692 | /* |
| 693 | * ACPI 2.0 requires the EC driver to be loaded and work before |
| 694 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| 695 | * is called). |
| 696 | * |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 697 | * This is accomplished by looking for the ECDT table, and getting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | * the EC parameters out of that. |
| 699 | */ |
| 700 | status = acpi_ec_ecdt_probe(); |
| 701 | /* Ignore result. Not having an ECDT is not fatal. */ |
| 702 | #endif |
| 703 | |
| 704 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| 705 | if (ACPI_FAILURE(status)) { |
| 706 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| 707 | goto error1; |
| 708 | } |
| 709 | |
| 710 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| 711 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 712 | /* Initialize sleep structures */ |
| 713 | acpi_sleep_init(); |
| 714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | /* |
| 716 | * Get the system interrupt model and evaluate \_PIC. |
| 717 | */ |
| 718 | result = acpi_bus_init_irq(); |
| 719 | if (result) |
| 720 | goto error1; |
| 721 | |
| 722 | /* |
| 723 | * Register the for all standard device notifications. |
| 724 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 725 | status = |
| 726 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| 727 | &acpi_bus_notify, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 729 | printk(KERN_ERR PREFIX |
| 730 | "Unable to register for device notifications\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | goto error1; |
| 732 | } |
| 733 | |
| 734 | /* |
| 735 | * Create the top ACPI proc directory |
| 736 | */ |
| 737 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| 738 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 739 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
| 741 | /* Mimic structured exception handling */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 742 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | acpi_terminate(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 744 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
| 746 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 747 | decl_subsys(acpi, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 749 | static int __init acpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 751 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | if (acpi_disabled) { |
| 755 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 756 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Randy Dunlap | d568df8 | 2006-07-12 01:47:00 -0400 | [diff] [blame] | 759 | result = firmware_register(&acpi_subsys); |
| 760 | if (result < 0) |
| 761 | printk(KERN_WARNING "%s: firmware_register error: %d\n", |
| 762 | __FUNCTION__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
| 764 | result = acpi_bus_init(); |
| 765 | |
| 766 | if (!result) { |
Jeff Garzik | bca73e4 | 2005-11-13 16:06:25 -0800 | [diff] [blame] | 767 | #ifdef CONFIG_PM_LEGACY |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if (!PM_IS_ACTIVE()) |
| 769 | pm_active = 1; |
| 770 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 771 | printk(KERN_INFO PREFIX |
| 772 | "APM is already active, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | disable_acpi(); |
| 774 | result = -ENODEV; |
| 775 | } |
| 776 | #endif |
| 777 | } else |
| 778 | disable_acpi(); |
| 779 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 780 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | subsys_initcall(acpi_init); |