blob: 3263b68cdfa3ea3404d8eb647fe317f28bc1c8ce [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Dunlapd568df82006-07-12 01:47:00 -040028#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/list.h>
30#include <linux/sched.h>
31#include <linux/pm.h>
32#include <linux/device.h>
33#include <linux/proc_fs.h>
Harvey Harrison6697c052008-02-09 23:24:08 +010034#include <linux/acpi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090035#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#ifdef CONFIG_X86
37#include <asm/mpspec.h>
38#endif
Robert Hancock7752d5c2008-02-15 01:27:20 -080039#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <acpi/acpi_bus.h>
41#include <acpi/acpi_drivers.h>
Huang Yingeccddd32011-07-13 13:14:20 +080042#include <acpi/apei.h>
Len Browneb27cae2009-07-06 23:40:19 -040043#include <linux/dmi.h>
Rafael J. Wysockicd51e61c2011-02-11 00:04:52 +010044#include <linux/suspend.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060046#include "internal.h"
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define _COMPONENT ACPI_BUS_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050049ACPI_MODULE_NAME("bus");
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Len Brown4be44fc2005-08-05 00:44:28 -040051struct acpi_device *acpi_root;
52struct proc_dir_entry *acpi_root_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053EXPORT_SYMBOL(acpi_root_dir);
54
55#define STRUCT_TO_INT(s) (*((int*)&s))
56
Zhao Yakui6415e122008-08-11 14:59:59 +080057
Lin Mingcce4f632010-05-12 09:26:48 +080058#ifdef CONFIG_X86
Lin Mingaa2110c2010-04-08 14:34:27 +080059static int set_copy_dsdt(const struct dmi_system_id *id)
60{
61 printk(KERN_NOTICE "%s detected - "
62 "force copy of DSDT to local memory\n", id->ident);
63 acpi_gbl_copy_dsdt_locally = 1;
64 return 0;
65}
66
67static struct dmi_system_id dsdt_dmi_table[] __initdata = {
68 /*
Len Brown100cf872010-09-28 22:57:02 -040069 * Invoke DSDT corruption work-around on all Toshiba Satellite.
Lin Mingaa2110c2010-04-08 14:34:27 +080070 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
71 */
72 {
73 .callback = set_copy_dsdt,
Len Brown100cf872010-09-28 22:57:02 -040074 .ident = "TOSHIBA Satellite",
Lin Mingaa2110c2010-04-08 14:34:27 +080075 .matches = {
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
Len Brown100cf872010-09-28 22:57:02 -040077 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
Lin Mingaa2110c2010-04-08 14:34:27 +080078 },
Lin Mingcce4f632010-05-12 09:26:48 +080079 },
80 {}
Lin Mingaa2110c2010-04-08 14:34:27 +080081};
Lin Mingcce4f632010-05-12 09:26:48 +080082#else
83static struct dmi_system_id dsdt_dmi_table[] __initdata = {
84 {}
85};
86#endif
Lin Mingaa2110c2010-04-08 14:34:27 +080087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088/* --------------------------------------------------------------------------
89 Device Management
90 -------------------------------------------------------------------------- */
91
Len Brown4be44fc2005-08-05 00:44:28 -040092int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093{
Len Brown4be44fc2005-08-05 00:44:28 -040094 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -040098 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 /* TBD: Support fixed-feature devices */
101
Len Brown4be44fc2005-08-05 00:44:28 -0400102 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 if (ACPI_FAILURE(status) || !*device) {
Len Brown9805cb72006-07-25 13:30:57 -0400104 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
105 handle));
Patrick Mocheld550d982006-06-27 00:41:40 -0400106 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
108
Patrick Mocheld550d982006-06-27 00:41:40 -0400109 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
Len Brown4be44fc2005-08-05 00:44:28 -0400111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112EXPORT_SYMBOL(acpi_bus_get_device);
113
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000114acpi_status acpi_bus_get_status_handle(acpi_handle handle,
115 unsigned long long *sta)
116{
117 acpi_status status;
118
119 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
120 if (ACPI_SUCCESS(status))
121 return AE_OK;
122
123 if (status == AE_NOT_FOUND) {
124 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
125 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
126 return AE_OK;
127 }
128 return status;
129}
130
Len Brown4be44fc2005-08-05 00:44:28 -0400131int acpi_bus_get_status(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000133 acpi_status status;
134 unsigned long long sta;
Len Brown4be44fc2005-08-05 00:44:28 -0400135
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000136 status = acpi_bus_get_status_handle(device->handle, &sta);
137 if (ACPI_FAILURE(status))
138 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000140 STRUCT_TO_INT(device->status) = (int) sta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142 if (device->status.functional && !device->status.present) {
Zhao Yakui39a0ad82008-08-11 13:40:22 +0800143 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
144 "functional but not present;\n",
145 device->pnp.bus_id,
146 (u32) STRUCT_TO_INT(device->status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 }
148
Len Brown4be44fc2005-08-05 00:44:28 -0400149 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
150 device->pnp.bus_id,
151 (u32) STRUCT_TO_INT(device->status)));
Patrick Mocheld550d982006-06-27 00:41:40 -0400152 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
Len Brown4be44fc2005-08-05 00:44:28 -0400154EXPORT_SYMBOL(acpi_bus_get_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Zhang Rui20733932008-01-17 15:51:21 +0800156void acpi_bus_private_data_handler(acpi_handle handle,
Bob Moore8e4319c2009-06-29 13:43:27 +0800157 void *context)
Zhang Rui20733932008-01-17 15:51:21 +0800158{
159 return;
160}
161EXPORT_SYMBOL(acpi_bus_private_data_handler);
162
163int acpi_bus_get_private_data(acpi_handle handle, void **data)
164{
165 acpi_status status = AE_OK;
166
167 if (!*data)
168 return -EINVAL;
169
170 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
171 if (ACPI_FAILURE(status) || !*data) {
172 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
173 handle));
174 return -ENODEV;
175 }
176
177 return 0;
178}
179EXPORT_SYMBOL(acpi_bus_get_private_data);
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/* --------------------------------------------------------------------------
182 Power Management
183 -------------------------------------------------------------------------- */
184
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100185static int __acpi_bus_get_power(struct acpi_device *device, int *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Len Brown4be44fc2005-08-05 00:44:28 -0400187 int result = 0;
188 acpi_status status = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400189 unsigned long long psc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100191 if (!device || !state)
192 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 *state = ACPI_STATE_UNKNOWN;
195
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100196 if (device->flags.power_manageable) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 /*
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500198 * Get the device's power state either directly (via _PSC) or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * indirectly (via power resources).
200 */
Zhang Rui0c99c522009-12-17 16:02:08 +0800201 if (device->power.flags.power_resources) {
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100202 result = acpi_power_get_inferred_state(device, state);
Zhang Rui0c99c522009-12-17 16:02:08 +0800203 if (result)
204 return result;
205 } else if (device->power.flags.explicit_get) {
Len Brown4be44fc2005-08-05 00:44:28 -0400206 status = acpi_evaluate_integer(device->handle, "_PSC",
207 NULL, &psc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400209 return -ENODEV;
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100210 *state = (int)psc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100212 } else {
213 /* TBD: Non-recursive algorithm for walking up hierarchy. */
214 *state = device->parent ?
215 device->parent->power.state : ACPI_STATE_D0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217
218 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100219 device->pnp.bus_id, *state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Patrick Mocheld550d982006-06-27 00:41:40 -0400221 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
Len Brown4be44fc2005-08-05 00:44:28 -0400223
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100224
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100225static int __acpi_bus_set_power(struct acpi_device *device, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Len Brown4be44fc2005-08-05 00:44:28 -0400227 int result = 0;
228 acpi_status status = AE_OK;
Len Brown4be44fc2005-08-05 00:44:28 -0400229 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Lin Ming28c21032011-05-04 22:56:43 +0800231 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
Patrick Mocheld550d982006-06-27 00:41:40 -0400232 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234 /* Make sure this is a valid target state */
235
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +0100236 if (state == device->power.state) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -0500237 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
238 state));
239 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -0500241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 if (!device->power.states[state].flags.valid) {
Len Browncece9292006-06-26 23:04:31 -0400243 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
Patrick Mocheld550d982006-06-27 00:41:40 -0400244 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 }
246 if (device->parent && (state < device->parent->power.state)) {
Len Browncece9292006-06-26 23:04:31 -0400247 printk(KERN_WARNING PREFIX
Thomas Renningera6fc6722006-06-26 23:58:43 -0400248 "Cannot set device to a higher-powered"
Len Browncece9292006-06-26 23:04:31 -0400249 " state than parent\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400250 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
252
253 /*
254 * Transition Power
255 * ----------------
256 * On transitions to a high-powered state we first apply power (via
257 * power resources) then evalute _PSx. Conversly for transitions to
258 * a lower-powered state.
David Shaohua Lib9131002005-03-19 00:16:18 -0500259 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 if (state < device->power.state) {
261 if (device->power.flags.power_resources) {
262 result = acpi_power_transition(device, state);
263 if (result)
264 goto end;
265 }
266 if (device->power.states[state].flags.explicit_set) {
Len Brown4be44fc2005-08-05 00:44:28 -0400267 status = acpi_evaluate_object(device->handle,
268 object_name, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 if (ACPI_FAILURE(status)) {
270 result = -ENODEV;
271 goto end;
272 }
273 }
Len Brown4be44fc2005-08-05 00:44:28 -0400274 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 if (device->power.states[state].flags.explicit_set) {
Len Brown4be44fc2005-08-05 00:44:28 -0400276 status = acpi_evaluate_object(device->handle,
277 object_name, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 if (ACPI_FAILURE(status)) {
279 result = -ENODEV;
280 goto end;
281 }
282 }
283 if (device->power.flags.power_resources) {
284 result = acpi_power_transition(device, state);
285 if (result)
286 goto end;
287 }
288 }
289
Len Brown4be44fc2005-08-05 00:44:28 -0400290 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 if (result)
Len Browncece9292006-06-26 23:04:31 -0400292 printk(KERN_WARNING PREFIX
Len Brownddc50b62009-05-08 00:07:30 -0400293 "Device [%s] failed to transition to D%d\n",
Len Browncece9292006-06-26 23:04:31 -0400294 device->pnp.bus_id, state);
Shaohua Li5e321322007-10-11 23:53:58 +0200295 else {
296 device->power.state = state;
Len Brown4be44fc2005-08-05 00:44:28 -0400297 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
298 "Device [%s] transitioned to D%d\n",
299 device->pnp.bus_id, state));
Shaohua Li5e321322007-10-11 23:53:58 +0200300 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Patrick Mocheld550d982006-06-27 00:41:40 -0400302 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303}
Len Brown4be44fc2005-08-05 00:44:28 -0400304
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100305
306int acpi_bus_set_power(acpi_handle handle, int state)
307{
308 struct acpi_device *device;
309 int result;
310
311 result = acpi_bus_get_device(handle, &device);
312 if (result)
313 return result;
314
315 if (!device->flags.power_manageable) {
316 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
317 "Device [%s] is not power manageable\n",
318 dev_name(&device->dev)));
319 return -ENODEV;
320 }
321
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100322 return __acpi_bus_set_power(device, state);
323}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324EXPORT_SYMBOL(acpi_bus_set_power);
325
Rafael J. Wysockiade3e7f2010-11-25 00:08:36 +0100326
327int acpi_bus_init_power(struct acpi_device *device)
328{
329 int state;
330 int result;
331
332 if (!device)
333 return -EINVAL;
334
335 device->power.state = ACPI_STATE_UNKNOWN;
336
337 result = __acpi_bus_get_power(device, &state);
338 if (result)
339 return result;
340
341 if (device->power.flags.power_resources)
342 result = acpi_power_on_resources(device, state);
343
344 if (!result)
345 device->power.state = state;
346
347 return result;
348}
349
350
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100351int acpi_bus_update_power(acpi_handle handle, int *state_p)
352{
353 struct acpi_device *device;
354 int state;
355 int result;
356
357 result = acpi_bus_get_device(handle, &device);
358 if (result)
359 return result;
360
361 result = __acpi_bus_get_power(device, &state);
362 if (result)
363 return result;
364
365 result = __acpi_bus_set_power(device, state);
366 if (!result && state_p)
367 *state_p = state;
368
369 return result;
370}
371EXPORT_SYMBOL_GPL(acpi_bus_update_power);
372
373
Rafael J. Wysocki3737b2b2008-07-07 03:30:55 +0200374bool acpi_bus_power_manageable(acpi_handle handle)
375{
376 struct acpi_device *device;
377 int result;
378
379 result = acpi_bus_get_device(handle, &device);
380 return result ? false : device->flags.power_manageable;
381}
382
383EXPORT_SYMBOL(acpi_bus_power_manageable);
384
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200385bool acpi_bus_can_wakeup(acpi_handle handle)
386{
387 struct acpi_device *device;
388 int result;
389
390 result = acpi_bus_get_device(handle, &device);
391 return result ? false : device->wakeup.flags.valid;
392}
393
394EXPORT_SYMBOL(acpi_bus_can_wakeup);
395
Shaohua Li70023de2009-10-29 11:04:28 +0800396static void acpi_print_osc_error(acpi_handle handle,
397 struct acpi_osc_context *context, char *error)
398{
399 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
400 int i;
401
402 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
403 printk(KERN_DEBUG "%s\n", error);
404 else {
405 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
406 kfree(buffer.pointer);
407 }
408 printk(KERN_DEBUG"_OSC request data:");
409 for (i = 0; i < context->cap.length; i += sizeof(u32))
410 printk("%x ", *((u32 *)(context->cap.pointer + i)));
411 printk("\n");
412}
413
Shaohua Li70023de2009-10-29 11:04:28 +0800414static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
415{
416 int i;
417 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
418 24, 26, 28, 30, 32, 34};
419
420 if (strlen(str) != 36)
421 return AE_BAD_PARAMETER;
422 for (i = 0; i < 36; i++) {
423 if (i == 8 || i == 13 || i == 18 || i == 23) {
424 if (str[i] != '-')
425 return AE_BAD_PARAMETER;
426 } else if (!isxdigit(str[i]))
427 return AE_BAD_PARAMETER;
428 }
429 for (i = 0; i < 16; i++) {
Andy Shevchenko965fd9e2010-05-24 14:33:28 -0700430 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
431 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
Shaohua Li70023de2009-10-29 11:04:28 +0800432 }
433 return AE_OK;
434}
435
436acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
437{
438 acpi_status status;
439 struct acpi_object_list input;
440 union acpi_object in_params[4];
441 union acpi_object *out_obj;
442 u8 uuid[16];
443 u32 errors;
Shaohua Li9dc130f2009-12-23 17:04:11 +0800444 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
Shaohua Li70023de2009-10-29 11:04:28 +0800445
446 if (!context)
447 return AE_ERROR;
448 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
449 return AE_ERROR;
450 context->ret.length = ACPI_ALLOCATE_BUFFER;
451 context->ret.pointer = NULL;
452
453 /* Setting up input parameters */
454 input.count = 4;
455 input.pointer = in_params;
456 in_params[0].type = ACPI_TYPE_BUFFER;
457 in_params[0].buffer.length = 16;
458 in_params[0].buffer.pointer = uuid;
459 in_params[1].type = ACPI_TYPE_INTEGER;
460 in_params[1].integer.value = context->rev;
461 in_params[2].type = ACPI_TYPE_INTEGER;
462 in_params[2].integer.value = context->cap.length/sizeof(u32);
463 in_params[3].type = ACPI_TYPE_BUFFER;
464 in_params[3].buffer.length = context->cap.length;
465 in_params[3].buffer.pointer = context->cap.pointer;
466
Shaohua Li9dc130f2009-12-23 17:04:11 +0800467 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
Shaohua Li70023de2009-10-29 11:04:28 +0800468 if (ACPI_FAILURE(status))
469 return status;
470
Shaohua Li9dc130f2009-12-23 17:04:11 +0800471 if (!output.length)
Shaohua Li70023de2009-10-29 11:04:28 +0800472 return AE_NULL_OBJECT;
473
Shaohua Li9dc130f2009-12-23 17:04:11 +0800474 out_obj = output.pointer;
475 if (out_obj->type != ACPI_TYPE_BUFFER
476 || out_obj->buffer.length != context->cap.length) {
Shaohua Li70023de2009-10-29 11:04:28 +0800477 acpi_print_osc_error(handle, context,
478 "_OSC evaluation returned wrong type");
479 status = AE_TYPE;
480 goto out_kfree;
481 }
482 /* Need to ignore the bit0 in result code */
483 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
484 if (errors) {
485 if (errors & OSC_REQUEST_ERROR)
486 acpi_print_osc_error(handle, context,
487 "_OSC request failed");
488 if (errors & OSC_INVALID_UUID_ERROR)
489 acpi_print_osc_error(handle, context,
490 "_OSC invalid UUID");
491 if (errors & OSC_INVALID_REVISION_ERROR)
492 acpi_print_osc_error(handle, context,
493 "_OSC invalid revision");
494 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
495 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
496 & OSC_QUERY_ENABLE)
497 goto out_success;
498 status = AE_SUPPORT;
499 goto out_kfree;
500 }
501 status = AE_ERROR;
502 goto out_kfree;
503 }
504out_success:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800505 context->ret.length = out_obj->buffer.length;
506 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
507 if (!context->ret.pointer) {
508 status = AE_NO_MEMORY;
509 goto out_kfree;
510 }
511 memcpy(context->ret.pointer, out_obj->buffer.pointer,
512 context->ret.length);
513 status = AE_OK;
Shaohua Li70023de2009-10-29 11:04:28 +0800514
515out_kfree:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800516 kfree(output.pointer);
517 if (status != AE_OK)
518 context->ret.pointer = NULL;
Shaohua Li70023de2009-10-29 11:04:28 +0800519 return status;
520}
521EXPORT_SYMBOL(acpi_run_osc);
522
Huang Yingeccddd32011-07-13 13:14:20 +0800523bool osc_sb_apei_support_acked;
Shaohua Li3563ff92009-10-29 11:05:05 +0800524static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
525static void acpi_bus_osc_support(void)
526{
527 u32 capbuf[2];
528 struct acpi_osc_context context = {
529 .uuid_str = sb_uuid_str,
530 .rev = 1,
531 .cap.length = 8,
532 .cap.pointer = capbuf,
533 };
534 acpi_handle handle;
535
536 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
537 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800538#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
539 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
Shaohua Li3563ff92009-10-29 11:05:05 +0800540 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
541#endif
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800542
543#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
544 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
545#endif
Huang Yingeccddd32011-07-13 13:14:20 +0800546
Huang Yingeccddd32011-07-13 13:14:20 +0800547 if (!ghes_disable)
548 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800549 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
550 return;
Huang Yingeccddd32011-07-13 13:14:20 +0800551 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
552 u32 *capbuf_ret = context.ret.pointer;
553 if (context.ret.length > OSC_SUPPORT_TYPE)
554 osc_sb_apei_support_acked =
555 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800556 kfree(context.ret.pointer);
Huang Yingeccddd32011-07-13 13:14:20 +0800557 }
558 /* do we need to check other returned cap? Sounds no */
Shaohua Li3563ff92009-10-29 11:05:05 +0800559}
560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561/* --------------------------------------------------------------------------
562 Event Management
563 -------------------------------------------------------------------------- */
564
Len Brown14e04fb2007-08-23 15:20:26 -0400565#ifdef CONFIG_ACPI_PROC_EVENT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566static DEFINE_SPINLOCK(acpi_bus_event_lock);
567
568LIST_HEAD(acpi_bus_event_list);
569DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
570
Len Brown4be44fc2005-08-05 00:44:28 -0400571extern int event_is_open;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400573int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574{
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400575 struct acpi_bus_event *event;
Len Brown4be44fc2005-08-05 00:44:28 -0400576 unsigned long flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 /* drop event on the floor if no one's listening */
579 if (!event_is_open)
Patrick Mocheld550d982006-06-27 00:41:40 -0400580 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Dan Carpenter5cc4a0f2010-04-27 00:23:37 +0200582 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (!event)
Patrick Mocheld550d982006-06-27 00:41:40 -0400584 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400586 strcpy(event->device_class, device_class);
587 strcpy(event->bus_id, bus_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 event->type = type;
589 event->data = data;
590
591 spin_lock_irqsave(&acpi_bus_event_lock, flags);
592 list_add_tail(&event->node, &acpi_bus_event_list);
593 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
594
595 wake_up_interruptible(&acpi_bus_event_queue);
596
Patrick Mocheld550d982006-06-27 00:41:40 -0400597 return 0;
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400598
599}
600
601EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
602
603int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
604{
605 if (!device)
606 return -EINVAL;
607 return acpi_bus_generate_proc_event4(device->pnp.device_class,
608 device->pnp.bus_id, type, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609}
Len Brown4be44fc2005-08-05 00:44:28 -0400610
Len Brown14e04fb2007-08-23 15:20:26 -0400611EXPORT_SYMBOL(acpi_bus_generate_proc_event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Len Brown4be44fc2005-08-05 00:44:28 -0400613int acpi_bus_receive_event(struct acpi_bus_event *event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
Len Brown4be44fc2005-08-05 00:44:28 -0400615 unsigned long flags = 0;
616 struct acpi_bus_event *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
618 DECLARE_WAITQUEUE(wait, current);
619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
621 if (!event)
Patrick Mocheld550d982006-06-27 00:41:40 -0400622 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 if (list_empty(&acpi_bus_event_list)) {
625
626 set_current_state(TASK_INTERRUPTIBLE);
627 add_wait_queue(&acpi_bus_event_queue, &wait);
628
629 if (list_empty(&acpi_bus_event_list))
630 schedule();
631
632 remove_wait_queue(&acpi_bus_event_queue, &wait);
633 set_current_state(TASK_RUNNING);
634
635 if (signal_pending(current))
Patrick Mocheld550d982006-06-27 00:41:40 -0400636 return -ERESTARTSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 }
638
639 spin_lock_irqsave(&acpi_bus_event_lock, flags);
Chuck Ebbertf0a37e02008-04-15 14:34:47 -0700640 if (!list_empty(&acpi_bus_event_list)) {
641 entry = list_entry(acpi_bus_event_list.next,
642 struct acpi_bus_event, node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 list_del(&entry->node);
Chuck Ebbertf0a37e02008-04-15 14:34:47 -0700644 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
646
647 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400648 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650 memcpy(event, entry, sizeof(struct acpi_bus_event));
651
652 kfree(entry);
653
Patrick Mocheld550d982006-06-27 00:41:40 -0400654 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Len Brown14e04fb2007-08-23 15:20:26 -0400657#endif /* CONFIG_ACPI_PROC_EVENT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
659/* --------------------------------------------------------------------------
660 Notification Handling
661 -------------------------------------------------------------------------- */
662
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600663static void acpi_bus_check_device(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664{
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600665 struct acpi_device *device;
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600666 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 struct acpi_device_status old_status;
668
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600669 if (acpi_bus_get_device(handle, &device))
670 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 if (!device)
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600672 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 old_status = device->status;
675
676 /*
677 * Make sure this device's parent is present before we go about
678 * messing with the device.
679 */
680 if (device->parent && !device->parent->status.present) {
681 device->status = device->parent->status;
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600682 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 }
684
685 status = acpi_bus_get_status(device);
686 if (ACPI_FAILURE(status))
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600687 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600690 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 /*
693 * Device Insertion/Removal
694 */
695 if ((device->status.present) && !(old_status.present)) {
696 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
697 /* TBD: Handle device insertion */
Len Brown4be44fc2005-08-05 00:44:28 -0400698 } else if (!(device->status.present) && (old_status.present)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
700 /* TBD: Handle device removal */
701 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702}
703
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600704static void acpi_bus_check_scope(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 /* Status Change? */
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600707 acpi_bus_check_device(handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 /*
710 * TBD: Enumerate child devices within this device's scope and
711 * run acpi_bus_check_device()'s on them.
712 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713}
714
Shaohua Li6bd00a62008-08-28 10:04:29 +0800715static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
716int register_acpi_bus_notifier(struct notifier_block *nb)
717{
718 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
719}
720EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
721
722void unregister_acpi_bus_notifier(struct notifier_block *nb)
723{
724 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
725}
726EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728/**
729 * acpi_bus_notify
730 * ---------------
731 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
732 */
Len Brown4be44fc2005-08-05 00:44:28 -0400733static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734{
Len Brown4be44fc2005-08-05 00:44:28 -0400735 struct acpi_device *device = NULL;
Bjorn Helgaas6d278132009-04-30 09:35:37 -0600736 struct acpi_driver *driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Bjorn Helgaas02c37bd2009-05-22 11:43:41 -0600738 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
739 type, handle));
740
Shaohua Li6bd00a62008-08-28 10:04:29 +0800741 blocking_notifier_call_chain(&acpi_bus_notify_list,
742 type, (void *)handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 switch (type) {
745
746 case ACPI_NOTIFY_BUS_CHECK:
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600747 acpi_bus_check_scope(handle);
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500748 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 * TBD: We'll need to outsource certain events to non-ACPI
Len Brown4be44fc2005-08-05 00:44:28 -0400750 * drivers via the device manager (device.c).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 */
752 break;
753
754 case ACPI_NOTIFY_DEVICE_CHECK:
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600755 acpi_bus_check_device(handle);
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500756 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 * TBD: We'll need to outsource certain events to non-ACPI
Len Brown4be44fc2005-08-05 00:44:28 -0400758 * drivers via the device manager (device.c).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 */
760 break;
761
762 case ACPI_NOTIFY_DEVICE_WAKE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 /* TBD */
764 break;
765
766 case ACPI_NOTIFY_EJECT_REQUEST:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 /* TBD */
768 break;
769
770 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 /* TBD: Exactly what does 'light' mean? */
772 break;
773
774 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 /* TBD */
776 break;
777
778 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 /* TBD */
780 break;
781
782 case ACPI_NOTIFY_POWER_FAULT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 /* TBD */
784 break;
785
786 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400787 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
788 "Received unknown/unsupported notification [%08x]\n",
789 type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 break;
791 }
792
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600793 acpi_bus_get_device(handle, &device);
794 if (device) {
795 driver = device->driver;
796 if (driver && driver->ops.notify &&
797 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
798 driver->ops.notify(device, type);
799 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800}
801
802/* --------------------------------------------------------------------------
803 Initialization/Cleanup
804 -------------------------------------------------------------------------- */
805
Len Brown4be44fc2005-08-05 00:44:28 -0400806static int __init acpi_bus_init_irq(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807{
Len Brown4be44fc2005-08-05 00:44:28 -0400808 acpi_status status = AE_OK;
809 union acpi_object arg = { ACPI_TYPE_INTEGER };
810 struct acpi_object_list arg_list = { 1, &arg };
811 char *message = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500814 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 * Let the system know what interrupt model we are using by
816 * evaluating the \_PIC object, if exists.
817 */
818
819 switch (acpi_irq_model) {
820 case ACPI_IRQ_MODEL_PIC:
821 message = "PIC";
822 break;
823 case ACPI_IRQ_MODEL_IOAPIC:
824 message = "IOAPIC";
825 break;
826 case ACPI_IRQ_MODEL_IOSAPIC:
827 message = "IOSAPIC";
828 break;
John Keller3948ec92006-12-22 11:50:04 -0600829 case ACPI_IRQ_MODEL_PLATFORM:
830 message = "platform specific model";
831 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 default:
833 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400834 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836
837 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
838
839 arg.integer.value = acpi_irq_model;
840
841 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
842 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400843 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400844 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846
Patrick Mocheld550d982006-06-27 00:41:40 -0400847 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848}
849
Bob Moore67a119f2008-06-10 13:42:13 +0800850u8 acpi_gbl_permanent_mmap;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300851
852
Len Brown4be44fc2005-08-05 00:44:28 -0400853void __init acpi_early_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
Len Brown4be44fc2005-08-05 00:44:28 -0400855 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
857 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400858 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Bob Moore616861242006-03-17 16:44:00 -0500860 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 /* enable workarounds, unless strict ACPI spec. compliance */
863 if (!acpi_strict)
864 acpi_gbl_enable_interpreter_slack = TRUE;
865
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300866 acpi_gbl_permanent_mmap = 1;
867
Lin Mingaa2110c2010-04-08 14:34:27 +0800868 /*
869 * If the machine falls into the DMI check table,
870 * DSDT will be copied to memory
871 */
872 dmi_check_system(dsdt_dmi_table);
873
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300874 status = acpi_reallocate_root_table();
875 if (ACPI_FAILURE(status)) {
876 printk(KERN_ERR PREFIX
877 "Unable to reallocate ACPI tables\n");
878 goto error0;
879 }
880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 status = acpi_initialize_subsystem();
882 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400883 printk(KERN_ERR PREFIX
884 "Unable to initialize the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 goto error0;
886 }
887
888 status = acpi_load_tables();
889 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400890 printk(KERN_ERR PREFIX
891 "Unable to load the System Description Tables\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 goto error0;
893 }
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895#ifdef CONFIG_X86
896 if (!acpi_ioapic) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 /* compatible (0) means level (3) */
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300898 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
899 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
900 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 /* Set PIC-mode SCI trigger type */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300903 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300904 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 /*
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300907 * now that acpi_gbl_FADT is initialized,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 * update it with result from INT_SRC_OVR parsing
909 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300910 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 }
912#endif
913
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100914 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 if (ACPI_FAILURE(status)) {
916 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
917 goto error0;
918 }
919
Patrick Mocheld550d982006-06-27 00:41:40 -0400920 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
Len Brown4be44fc2005-08-05 00:44:28 -0400922 error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 disable_acpi();
Patrick Mocheld550d982006-06-27 00:41:40 -0400924 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925}
926
Len Brown4be44fc2005-08-05 00:44:28 -0400927static int __init acpi_bus_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928{
Len Brown4be44fc2005-08-05 00:44:28 -0400929 int result = 0;
930 acpi_status status = AE_OK;
931 extern acpi_status acpi_os_initialize1(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Jiri Slaby176f9c12009-03-04 11:55:27 -0800933 acpi_os_initialize1();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100935 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400937 printk(KERN_ERR PREFIX
938 "Unable to start the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 goto error1;
940 }
941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 /*
943 * ACPI 2.0 requires the EC driver to be loaded and work before
944 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
945 * is called).
946 *
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500947 * This is accomplished by looking for the ECDT table, and getting
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 * the EC parameters out of that.
949 */
950 status = acpi_ec_ecdt_probe();
951 /* Ignore result. Not having an ECDT is not fatal. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Shaohua Li3563ff92009-10-29 11:05:05 +0800953 acpi_bus_osc_support();
954
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
956 if (ACPI_FAILURE(status)) {
957 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
958 goto error1;
959 }
960
Zhang Ruib1d248d2010-10-26 10:06:54 +0800961 /*
962 * _PDC control method may load dynamic SSDT tables,
963 * and we need to install the table handler before that.
964 */
965 acpi_sysfs_init();
966
Alex Chiang78f16992009-12-20 12:19:09 -0700967 acpi_early_processor_set_pdc();
968
Zhao Yakui455c8792008-10-06 10:31:36 +0800969 /*
970 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
971 * is necessary to enable it as early as possible.
972 */
973 acpi_boot_ec_enable();
974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 printk(KERN_INFO PREFIX "Interpreter enabled\n");
976
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500977 /* Initialize sleep structures */
978 acpi_sleep_init();
979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 /*
981 * Get the system interrupt model and evaluate \_PIC.
982 */
983 result = acpi_bus_init_irq();
984 if (result)
985 goto error1;
986
987 /*
988 * Register the for all standard device notifications.
989 */
Len Brown4be44fc2005-08-05 00:44:28 -0400990 status =
991 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
992 &acpi_bus_notify, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400994 printk(KERN_ERR PREFIX
995 "Unable to register for device notifications\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 goto error1;
997 }
998
999 /*
1000 * Create the top ACPI proc directory
1001 */
1002 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1003
Patrick Mocheld550d982006-06-27 00:41:40 -04001004 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005
1006 /* Mimic structured exception handling */
Len Brown4be44fc2005-08-05 00:44:28 -04001007 error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 acpi_terminate();
Patrick Mocheld550d982006-06-27 00:41:40 -04001009 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010}
1011
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001012struct kobject *acpi_kobj;
Matthew Garrettf2d47532012-01-31 13:19:19 -05001013EXPORT_SYMBOL_GPL(acpi_kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
Len Brown4be44fc2005-08-05 00:44:28 -04001015static int __init acpi_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016{
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +01001017 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 if (acpi_disabled) {
1020 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001021 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 }
1023
Greg Kroah-Hartmanf62ed9e2007-11-05 13:16:15 -08001024 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001025 if (!acpi_kobj) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001026 printk(KERN_WARNING "%s: kset create error\n", __func__);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001027 acpi_kobj = NULL;
1028 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Bjorn Helgaas0e465172009-03-24 16:50:09 -06001030 init_acpi_device_notify();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 result = acpi_bus_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +01001032 if (result) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 disable_acpi();
Bjorn Helgaas81d02732009-03-24 16:49:38 -06001034 return result;
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +01001035 }
Bjorn Helgaas81d02732009-03-24 16:49:38 -06001036
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +01001037 pci_mmcfg_late_init();
Bjorn Helgaase747f272009-03-24 16:49:43 -06001038 acpi_scan_init();
Bjorn Helgaasa5f820f2009-03-24 16:49:48 -06001039 acpi_ec_init();
Zhang Ruia25ee922010-07-15 10:46:15 +08001040 acpi_debugfs_init();
Bjorn Helgaas9cee43e2009-03-24 16:50:14 -06001041 acpi_sleep_proc_init();
Bjorn Helgaas201b8c62009-03-24 16:50:19 -06001042 acpi_wakeup_device_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +01001043 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046subsys_initcall(acpi_init);