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 | /* |
| 201 | * Get device's current power state if it's unknown |
| 202 | * This means device power state isn't initialized or previous setting failed |
| 203 | */ |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 204 | if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state) |
| 205 | acpi_bus_get_power(device->handle, &device->power.state); |
| 206 | if ((state == device->power.state) && !device->flags.force_power_state) { |
| 207 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| 208 | state)); |
| 209 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } |
Konstantin Karasyov | b1028c5 | 2007-02-16 02:23:07 -0500 | [diff] [blame] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (!device->power.states[state].flags.valid) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 213 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 214 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | if (device->parent && (state < device->parent->power.state)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 217 | printk(KERN_WARNING PREFIX |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 218 | "Cannot set device to a higher-powered" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 219 | " state than parent\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 220 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Transition Power |
| 225 | * ---------------- |
| 226 | * On transitions to a high-powered state we first apply power (via |
| 227 | * power resources) then evalute _PSx. Conversly for transitions to |
| 228 | * a lower-powered state. |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 229 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | if (state < device->power.state) { |
| 231 | if (device->power.flags.power_resources) { |
| 232 | result = acpi_power_transition(device, state); |
| 233 | if (result) |
| 234 | goto end; |
| 235 | } |
| 236 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | status = acpi_evaluate_object(device->handle, |
| 238 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | if (ACPI_FAILURE(status)) { |
| 240 | result = -ENODEV; |
| 241 | goto end; |
| 242 | } |
| 243 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (device->power.states[state].flags.explicit_set) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 246 | status = acpi_evaluate_object(device->handle, |
| 247 | object_name, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (ACPI_FAILURE(status)) { |
| 249 | result = -ENODEV; |
| 250 | goto end; |
| 251 | } |
| 252 | } |
| 253 | if (device->power.flags.power_resources) { |
| 254 | result = acpi_power_transition(device, state); |
| 255 | if (result) |
| 256 | goto end; |
| 257 | } |
| 258 | } |
| 259 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 260 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (result) |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 262 | printk(KERN_WARNING PREFIX |
| 263 | "Transitioning device [%s] to D%d\n", |
| 264 | device->pnp.bus_id, state); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 265 | else { |
| 266 | device->power.state = state; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 267 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 268 | "Device [%s] transitioned to D%d\n", |
| 269 | device->pnp.bus_id, state)); |
Shaohua Li | 5e32132 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 272 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | EXPORT_SYMBOL(acpi_bus_set_power); |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* -------------------------------------------------------------------------- |
| 278 | Event Management |
| 279 | -------------------------------------------------------------------------- */ |
| 280 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 281 | #ifdef CONFIG_ACPI_PROC_EVENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| 283 | |
| 284 | LIST_HEAD(acpi_bus_event_list); |
| 285 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| 286 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 287 | extern int event_is_open; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 289 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 291 | struct acpi_bus_event *event = NULL; |
| 292 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 296 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | /* drop event on the floor if no one's listening */ |
| 299 | if (!event_is_open) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 300 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| 303 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 304 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | strcpy(event->device_class, device->pnp.device_class); |
| 307 | strcpy(event->bus_id, device->pnp.bus_id); |
| 308 | event->type = type; |
| 309 | event->data = data; |
| 310 | |
| 311 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| 312 | list_add_tail(&event->node, &acpi_bus_event_list); |
| 313 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 314 | |
| 315 | wake_up_interruptible(&acpi_bus_event_queue); |
| 316 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 317 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 319 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 320 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 322 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
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 | unsigned long flags = 0; |
| 325 | struct acpi_bus_event *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | DECLARE_WAITQUEUE(wait, current); |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | if (!event) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 331 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | if (list_empty(&acpi_bus_event_list)) { |
| 334 | |
| 335 | set_current_state(TASK_INTERRUPTIBLE); |
| 336 | add_wait_queue(&acpi_bus_event_queue, &wait); |
| 337 | |
| 338 | if (list_empty(&acpi_bus_event_list)) |
| 339 | schedule(); |
| 340 | |
| 341 | remove_wait_queue(&acpi_bus_event_queue, &wait); |
| 342 | set_current_state(TASK_RUNNING); |
| 343 | |
| 344 | if (signal_pending(current)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 345 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | spin_lock_irqsave(&acpi_bus_event_lock, flags); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 349 | entry = |
| 350 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | if (entry) |
| 352 | list_del(&entry->node); |
| 353 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| 354 | |
| 355 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 356 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| 359 | |
| 360 | kfree(entry); |
| 361 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 362 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 365 | EXPORT_SYMBOL(acpi_bus_receive_event); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 366 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
| 368 | /* -------------------------------------------------------------------------- |
| 369 | Notification Handling |
| 370 | -------------------------------------------------------------------------- */ |
| 371 | |
| 372 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 373 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | acpi_status status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | struct acpi_device_status old_status; |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 380 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | if (status_changed) |
| 383 | *status_changed = 0; |
| 384 | |
| 385 | old_status = device->status; |
| 386 | |
| 387 | /* |
| 388 | * Make sure this device's parent is present before we go about |
| 389 | * messing with the device. |
| 390 | */ |
| 391 | if (device->parent && !device->parent->status.present) { |
| 392 | device->status = device->parent->status; |
| 393 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { |
| 394 | if (status_changed) |
| 395 | *status_changed = 1; |
| 396 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 397 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | status = acpi_bus_get_status(device); |
| 401 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 402 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 405 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | if (status_changed) |
| 408 | *status_changed = 1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | /* |
| 411 | * Device Insertion/Removal |
| 412 | */ |
| 413 | if ((device->status.present) && !(old_status.present)) { |
| 414 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| 415 | /* TBD: Handle device insertion */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | } else if (!(device->status.present) && (old_status.present)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| 418 | /* TBD: Handle device removal */ |
| 419 | } |
| 420 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 421 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 424 | static int acpi_bus_check_scope(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 426 | int result = 0; |
| 427 | int status_changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 431 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* Status Change? */ |
| 434 | result = acpi_bus_check_device(device, &status_changed); |
| 435 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 436 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
| 438 | if (!status_changed) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 439 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | /* |
| 442 | * TBD: Enumerate child devices within this device's scope and |
| 443 | * run acpi_bus_check_device()'s on them. |
| 444 | */ |
| 445 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 446 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | /** |
| 450 | * acpi_bus_notify |
| 451 | * --------------- |
| 452 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| 453 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 454 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 456 | int result = 0; |
| 457 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | if (acpi_bus_get_device(handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 461 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | switch (type) { |
| 464 | |
| 465 | case ACPI_NOTIFY_BUS_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 466 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 467 | "Received BUS CHECK notification for device [%s]\n", |
| 468 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | result = acpi_bus_check_scope(device); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 470 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 472 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | */ |
| 474 | break; |
| 475 | |
| 476 | case ACPI_NOTIFY_DEVICE_CHECK: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 477 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 478 | "Received DEVICE CHECK notification for device [%s]\n", |
| 479 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | result = acpi_bus_check_device(device, NULL); |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 481 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | * TBD: We'll need to outsource certain events to non-ACPI |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 483 | * drivers via the device manager (device.c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | */ |
| 485 | break; |
| 486 | |
| 487 | case ACPI_NOTIFY_DEVICE_WAKE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 488 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 489 | "Received DEVICE WAKE notification for device [%s]\n", |
| 490 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | /* TBD */ |
| 492 | break; |
| 493 | |
| 494 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 495 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 496 | "Received EJECT REQUEST notification for device [%s]\n", |
| 497 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | /* TBD */ |
| 499 | break; |
| 500 | |
| 501 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 502 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 503 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", |
| 504 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | /* TBD: Exactly what does 'light' mean? */ |
| 506 | break; |
| 507 | |
| 508 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 509 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 510 | "Received FREQUENCY MISMATCH notification for device [%s]\n", |
| 511 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | /* TBD */ |
| 513 | break; |
| 514 | |
| 515 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 517 | "Received BUS MODE MISMATCH notification for device [%s]\n", |
| 518 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | /* TBD */ |
| 520 | break; |
| 521 | |
| 522 | case ACPI_NOTIFY_POWER_FAULT: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 523 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 524 | "Received POWER FAULT notification for device [%s]\n", |
| 525 | device->pnp.bus_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | /* TBD */ |
| 527 | break; |
| 528 | |
| 529 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 530 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 531 | "Received unknown/unsupported notification [%08x]\n", |
| 532 | type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | break; |
| 534 | } |
| 535 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 536 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /* -------------------------------------------------------------------------- |
| 540 | Initialization/Cleanup |
| 541 | -------------------------------------------------------------------------- */ |
| 542 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 543 | static int __init acpi_bus_init_irq(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 545 | acpi_status status = AE_OK; |
| 546 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| 547 | struct acpi_object_list arg_list = { 1, &arg }; |
| 548 | char *message = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 551 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | * Let the system know what interrupt model we are using by |
| 553 | * evaluating the \_PIC object, if exists. |
| 554 | */ |
| 555 | |
| 556 | switch (acpi_irq_model) { |
| 557 | case ACPI_IRQ_MODEL_PIC: |
| 558 | message = "PIC"; |
| 559 | break; |
| 560 | case ACPI_IRQ_MODEL_IOAPIC: |
| 561 | message = "IOAPIC"; |
| 562 | break; |
| 563 | case ACPI_IRQ_MODEL_IOSAPIC: |
| 564 | message = "IOSAPIC"; |
| 565 | break; |
John Keller | 3948ec9 | 2006-12-22 11:50:04 -0600 | [diff] [blame] | 566 | case ACPI_IRQ_MODEL_PLATFORM: |
| 567 | message = "platform specific model"; |
| 568 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | default: |
| 570 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 571 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| 575 | |
| 576 | arg.integer.value = acpi_irq_model; |
| 577 | |
| 578 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| 579 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 580 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 581 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 584 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
| 586 | |
Alexey Starikovskiy | ad71860 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 587 | acpi_native_uint acpi_gbl_permanent_mmap; |
| 588 | |
| 589 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 590 | void __init acpi_early_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 592 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 595 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Bob Moore | 6168612 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 597 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | /* enable workarounds, unless strict ACPI spec. compliance */ |
| 600 | if (!acpi_strict) |
| 601 | acpi_gbl_enable_interpreter_slack = TRUE; |
| 602 | |
Alexey Starikovskiy | ad71860 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 603 | acpi_gbl_permanent_mmap = 1; |
| 604 | |
| 605 | status = acpi_reallocate_root_table(); |
| 606 | if (ACPI_FAILURE(status)) { |
| 607 | printk(KERN_ERR PREFIX |
| 608 | "Unable to reallocate ACPI tables\n"); |
| 609 | goto error0; |
| 610 | } |
| 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | status = acpi_initialize_subsystem(); |
| 613 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 614 | printk(KERN_ERR PREFIX |
| 615 | "Unable to initialize the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | goto error0; |
| 617 | } |
| 618 | |
| 619 | status = acpi_load_tables(); |
| 620 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 621 | printk(KERN_ERR PREFIX |
| 622 | "Unable to load the System Description Tables\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | goto error0; |
| 624 | } |
| 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | #ifdef CONFIG_X86 |
| 627 | if (!acpi_ioapic) { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 628 | extern u8 acpi_sci_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
| 630 | /* compatible (0) means level (3) */ |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 631 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| 632 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| 633 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| 634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | /* Set PIC-mode SCI trigger type */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 636 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 637 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | } else { |
| 639 | extern int acpi_sci_override_gsi; |
| 640 | /* |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 641 | * now that acpi_gbl_FADT is initialized, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | * update it with result from INT_SRC_OVR parsing |
| 643 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 644 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |
| 646 | #endif |
| 647 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 648 | status = |
| 649 | acpi_enable_subsystem(~ |
| 650 | (ACPI_NO_HARDWARE_INIT | |
| 651 | ACPI_NO_ACPI_ENABLE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (ACPI_FAILURE(status)) { |
| 653 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| 654 | goto error0; |
| 655 | } |
| 656 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 657 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 659 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | disable_acpi(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 661 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 664 | static int __init acpi_bus_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 666 | int result = 0; |
| 667 | acpi_status status = AE_OK; |
| 668 | extern acpi_status acpi_os_initialize1(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | status = acpi_os_initialize1(); |
| 672 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 673 | status = |
| 674 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 676 | printk(KERN_ERR PREFIX |
| 677 | "Unable to start the ACPI Interpreter\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | goto error1; |
| 679 | } |
| 680 | |
| 681 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 682 | printk(KERN_ERR PREFIX |
| 683 | "Unable to initialize ACPI OS objects\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | goto error1; |
| 685 | } |
| 686 | #ifdef CONFIG_ACPI_EC |
| 687 | /* |
| 688 | * ACPI 2.0 requires the EC driver to be loaded and work before |
| 689 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| 690 | * is called). |
| 691 | * |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 692 | * This is accomplished by looking for the ECDT table, and getting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | * the EC parameters out of that. |
| 694 | */ |
| 695 | status = acpi_ec_ecdt_probe(); |
| 696 | /* Ignore result. Not having an ECDT is not fatal. */ |
| 697 | #endif |
| 698 | |
| 699 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| 700 | if (ACPI_FAILURE(status)) { |
| 701 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| 702 | goto error1; |
| 703 | } |
| 704 | |
| 705 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| 706 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 707 | /* Initialize sleep structures */ |
| 708 | acpi_sleep_init(); |
| 709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | /* |
| 711 | * Get the system interrupt model and evaluate \_PIC. |
| 712 | */ |
| 713 | result = acpi_bus_init_irq(); |
| 714 | if (result) |
| 715 | goto error1; |
| 716 | |
| 717 | /* |
| 718 | * Register the for all standard device notifications. |
| 719 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 720 | status = |
| 721 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| 722 | &acpi_bus_notify, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 724 | printk(KERN_ERR PREFIX |
| 725 | "Unable to register for device notifications\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | goto error1; |
| 727 | } |
| 728 | |
| 729 | /* |
| 730 | * Create the top ACPI proc directory |
| 731 | */ |
| 732 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| 733 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 734 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | |
| 736 | /* Mimic structured exception handling */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 737 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | acpi_terminate(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 739 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 742 | decl_subsys(acpi, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 744 | static int __init acpi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 746 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | if (acpi_disabled) { |
| 750 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 751 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
Randy Dunlap | d568df8 | 2006-07-12 01:47:00 -0400 | [diff] [blame] | 754 | result = firmware_register(&acpi_subsys); |
| 755 | if (result < 0) |
| 756 | printk(KERN_WARNING "%s: firmware_register error: %d\n", |
| 757 | __FUNCTION__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
| 759 | result = acpi_bus_init(); |
| 760 | |
| 761 | if (!result) { |
Jeff Garzik | bca73e4 | 2005-11-13 16:06:25 -0800 | [diff] [blame] | 762 | #ifdef CONFIG_PM_LEGACY |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | if (!PM_IS_ACTIVE()) |
| 764 | pm_active = 1; |
| 765 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 766 | printk(KERN_INFO PREFIX |
| 767 | "APM is already active, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | disable_acpi(); |
| 769 | result = -ENODEV; |
| 770 | } |
| 771 | #endif |
| 772 | } else |
| 773 | disable_acpi(); |
| 774 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 775 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | subsys_initcall(acpi_init); |