blob: 7ced61f394924e3e0eeb208de094f894cfd5e623 [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>
Len Browneb27cae2009-07-06 23:40:19 -040042#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060044#include "internal.h"
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define _COMPONENT ACPI_BUS_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050047ACPI_MODULE_NAME("bus");
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Len Brown4be44fc2005-08-05 00:44:28 -040049struct acpi_device *acpi_root;
50struct proc_dir_entry *acpi_root_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051EXPORT_SYMBOL(acpi_root_dir);
52
53#define STRUCT_TO_INT(s) (*((int*)&s))
54
Zhao Yakui6415e122008-08-11 14:59:59 +080055
Lin Mingcce4f632010-05-12 09:26:48 +080056#ifdef CONFIG_X86
Lin Mingaa2110c2010-04-08 14:34:27 +080057static int set_copy_dsdt(const struct dmi_system_id *id)
58{
59 printk(KERN_NOTICE "%s detected - "
60 "force copy of DSDT to local memory\n", id->ident);
61 acpi_gbl_copy_dsdt_locally = 1;
62 return 0;
63}
64
65static struct dmi_system_id dsdt_dmi_table[] __initdata = {
66 /*
Len Brown100cf872010-09-28 22:57:02 -040067 * Invoke DSDT corruption work-around on all Toshiba Satellite.
Lin Mingaa2110c2010-04-08 14:34:27 +080068 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
69 */
70 {
71 .callback = set_copy_dsdt,
Len Brown100cf872010-09-28 22:57:02 -040072 .ident = "TOSHIBA Satellite",
Lin Mingaa2110c2010-04-08 14:34:27 +080073 .matches = {
74 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
Len Brown100cf872010-09-28 22:57:02 -040075 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
Lin Mingaa2110c2010-04-08 14:34:27 +080076 },
Lin Mingcce4f632010-05-12 09:26:48 +080077 },
78 {}
Lin Mingaa2110c2010-04-08 14:34:27 +080079};
Lin Mingcce4f632010-05-12 09:26:48 +080080#else
81static struct dmi_system_id dsdt_dmi_table[] __initdata = {
82 {}
83};
84#endif
Lin Mingaa2110c2010-04-08 14:34:27 +080085
Linus Torvalds1da177e2005-04-16 15:20:36 -070086/* --------------------------------------------------------------------------
87 Device Management
88 -------------------------------------------------------------------------- */
89
Len Brown4be44fc2005-08-05 00:44:28 -040090int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091{
Len Brown4be44fc2005-08-05 00:44:28 -040092 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -040096 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98 /* TBD: Support fixed-feature devices */
99
Len Brown4be44fc2005-08-05 00:44:28 -0400100 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (ACPI_FAILURE(status) || !*device) {
Len Brown9805cb72006-07-25 13:30:57 -0400102 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
103 handle));
Patrick Mocheld550d982006-06-27 00:41:40 -0400104 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 }
106
Patrick Mocheld550d982006-06-27 00:41:40 -0400107 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
Len Brown4be44fc2005-08-05 00:44:28 -0400109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110EXPORT_SYMBOL(acpi_bus_get_device);
111
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000112acpi_status acpi_bus_get_status_handle(acpi_handle handle,
113 unsigned long long *sta)
114{
115 acpi_status status;
116
117 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
118 if (ACPI_SUCCESS(status))
119 return AE_OK;
120
121 if (status == AE_NOT_FOUND) {
122 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
123 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
124 return AE_OK;
125 }
126 return status;
127}
128
Len Brown4be44fc2005-08-05 00:44:28 -0400129int acpi_bus_get_status(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000131 acpi_status status;
132 unsigned long long sta;
Len Brown4be44fc2005-08-05 00:44:28 -0400133
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000134 status = acpi_bus_get_status_handle(device->handle, &sta);
135 if (ACPI_FAILURE(status))
136 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000138 STRUCT_TO_INT(device->status) = (int) sta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 if (device->status.functional && !device->status.present) {
Zhao Yakui39a0ad82008-08-11 13:40:22 +0800141 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
142 "functional but not present;\n",
143 device->pnp.bus_id,
144 (u32) STRUCT_TO_INT(device->status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 }
146
Len Brown4be44fc2005-08-05 00:44:28 -0400147 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
148 device->pnp.bus_id,
149 (u32) STRUCT_TO_INT(device->status)));
Patrick Mocheld550d982006-06-27 00:41:40 -0400150 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151}
Len Brown4be44fc2005-08-05 00:44:28 -0400152EXPORT_SYMBOL(acpi_bus_get_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Zhang Rui20733932008-01-17 15:51:21 +0800154void acpi_bus_private_data_handler(acpi_handle handle,
Bob Moore8e4319c2009-06-29 13:43:27 +0800155 void *context)
Zhang Rui20733932008-01-17 15:51:21 +0800156{
157 return;
158}
159EXPORT_SYMBOL(acpi_bus_private_data_handler);
160
161int acpi_bus_get_private_data(acpi_handle handle, void **data)
162{
163 acpi_status status = AE_OK;
164
165 if (!*data)
166 return -EINVAL;
167
168 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
169 if (ACPI_FAILURE(status) || !*data) {
170 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
171 handle));
172 return -ENODEV;
173 }
174
175 return 0;
176}
177EXPORT_SYMBOL(acpi_bus_get_private_data);
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179/* --------------------------------------------------------------------------
180 Power Management
181 -------------------------------------------------------------------------- */
182
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100183static int __acpi_bus_get_power(struct acpi_device *device, int *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Len Brown4be44fc2005-08-05 00:44:28 -0400185 int result = 0;
186 acpi_status status = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400187 unsigned long long psc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100189 if (!device || !state)
190 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 *state = ACPI_STATE_UNKNOWN;
193
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100194 if (device->flags.power_manageable) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 /*
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500196 * Get the device's power state either directly (via _PSC) or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 * indirectly (via power resources).
198 */
Zhang Rui0c99c522009-12-17 16:02:08 +0800199 if (device->power.flags.power_resources) {
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100200 result = acpi_power_get_inferred_state(device, state);
Zhang Rui0c99c522009-12-17 16:02:08 +0800201 if (result)
202 return result;
203 } else if (device->power.flags.explicit_get) {
Len Brown4be44fc2005-08-05 00:44:28 -0400204 status = acpi_evaluate_integer(device->handle, "_PSC",
205 NULL, &psc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400207 return -ENODEV;
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100208 *state = (int)psc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 }
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100210 } else {
211 /* TBD: Non-recursive algorithm for walking up hierarchy. */
212 *state = device->parent ?
213 device->parent->power.state : ACPI_STATE_D0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215
216 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100217 device->pnp.bus_id, *state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Patrick Mocheld550d982006-06-27 00:41:40 -0400219 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
Len Brown4be44fc2005-08-05 00:44:28 -0400221
Rafael J. Wysocki5e6d4fe2010-11-25 00:07:56 +0100222
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100223static int __acpi_bus_set_power(struct acpi_device *device, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
Len Brown4be44fc2005-08-05 00:44:28 -0400225 int result = 0;
226 acpi_status status = AE_OK;
Len Brown4be44fc2005-08-05 00:44:28 -0400227 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100229 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
Patrick Mocheld550d982006-06-27 00:41:40 -0400230 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 /* Make sure this is a valid target state */
233
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +0100234 if (state == device->power.state) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -0500235 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
236 state));
237 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -0500239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 if (!device->power.states[state].flags.valid) {
Len Browncece9292006-06-26 23:04:31 -0400241 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
Patrick Mocheld550d982006-06-27 00:41:40 -0400242 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
244 if (device->parent && (state < device->parent->power.state)) {
Len Browncece9292006-06-26 23:04:31 -0400245 printk(KERN_WARNING PREFIX
Thomas Renningera6fc6722006-06-26 23:58:43 -0400246 "Cannot set device to a higher-powered"
Len Browncece9292006-06-26 23:04:31 -0400247 " state than parent\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400248 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
250
251 /*
252 * Transition Power
253 * ----------------
254 * On transitions to a high-powered state we first apply power (via
255 * power resources) then evalute _PSx. Conversly for transitions to
256 * a lower-powered state.
David Shaohua Lib9131002005-03-19 00:16:18 -0500257 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (state < device->power.state) {
259 if (device->power.flags.power_resources) {
260 result = acpi_power_transition(device, state);
261 if (result)
262 goto end;
263 }
264 if (device->power.states[state].flags.explicit_set) {
Len Brown4be44fc2005-08-05 00:44:28 -0400265 status = acpi_evaluate_object(device->handle,
266 object_name, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (ACPI_FAILURE(status)) {
268 result = -ENODEV;
269 goto end;
270 }
271 }
Len Brown4be44fc2005-08-05 00:44:28 -0400272 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 if (device->power.states[state].flags.explicit_set) {
Len Brown4be44fc2005-08-05 00:44:28 -0400274 status = acpi_evaluate_object(device->handle,
275 object_name, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 if (ACPI_FAILURE(status)) {
277 result = -ENODEV;
278 goto end;
279 }
280 }
281 if (device->power.flags.power_resources) {
282 result = acpi_power_transition(device, state);
283 if (result)
284 goto end;
285 }
286 }
287
Len Brown4be44fc2005-08-05 00:44:28 -0400288 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 if (result)
Len Browncece9292006-06-26 23:04:31 -0400290 printk(KERN_WARNING PREFIX
Len Brownddc50b62009-05-08 00:07:30 -0400291 "Device [%s] failed to transition to D%d\n",
Len Browncece9292006-06-26 23:04:31 -0400292 device->pnp.bus_id, state);
Shaohua Li5e321322007-10-11 23:53:58 +0200293 else {
294 device->power.state = state;
Len Brown4be44fc2005-08-05 00:44:28 -0400295 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
296 "Device [%s] transitioned to D%d\n",
297 device->pnp.bus_id, state));
Shaohua Li5e321322007-10-11 23:53:58 +0200298 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Patrick Mocheld550d982006-06-27 00:41:40 -0400300 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
Len Brown4be44fc2005-08-05 00:44:28 -0400302
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100303
304int acpi_bus_set_power(acpi_handle handle, int state)
305{
306 struct acpi_device *device;
307 int result;
308
309 result = acpi_bus_get_device(handle, &device);
310 if (result)
311 return result;
312
313 if (!device->flags.power_manageable) {
314 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
315 "Device [%s] is not power manageable\n",
316 dev_name(&device->dev)));
317 return -ENODEV;
318 }
319
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100320 return __acpi_bus_set_power(device, state);
321}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322EXPORT_SYMBOL(acpi_bus_set_power);
323
Rafael J. Wysockiade3e7f2010-11-25 00:08:36 +0100324
325int acpi_bus_init_power(struct acpi_device *device)
326{
327 int state;
328 int result;
329
330 if (!device)
331 return -EINVAL;
332
333 device->power.state = ACPI_STATE_UNKNOWN;
334
335 result = __acpi_bus_get_power(device, &state);
336 if (result)
337 return result;
338
339 if (device->power.flags.power_resources)
340 result = acpi_power_on_resources(device, state);
341
342 if (!result)
343 device->power.state = state;
344
345 return result;
346}
347
348
Rafael J. Wysocki25eed402010-11-25 00:09:15 +0100349int acpi_bus_update_power(acpi_handle handle, int *state_p)
350{
351 struct acpi_device *device;
352 int state;
353 int result;
354
355 result = acpi_bus_get_device(handle, &device);
356 if (result)
357 return result;
358
359 result = __acpi_bus_get_power(device, &state);
360 if (result)
361 return result;
362
363 result = __acpi_bus_set_power(device, state);
364 if (!result && state_p)
365 *state_p = state;
366
367 return result;
368}
369EXPORT_SYMBOL_GPL(acpi_bus_update_power);
370
371
Rafael J. Wysocki3737b2b2008-07-07 03:30:55 +0200372bool acpi_bus_power_manageable(acpi_handle handle)
373{
374 struct acpi_device *device;
375 int result;
376
377 result = acpi_bus_get_device(handle, &device);
378 return result ? false : device->flags.power_manageable;
379}
380
381EXPORT_SYMBOL(acpi_bus_power_manageable);
382
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200383bool acpi_bus_can_wakeup(acpi_handle handle)
384{
385 struct acpi_device *device;
386 int result;
387
388 result = acpi_bus_get_device(handle, &device);
389 return result ? false : device->wakeup.flags.valid;
390}
391
392EXPORT_SYMBOL(acpi_bus_can_wakeup);
393
Shaohua Li70023de2009-10-29 11:04:28 +0800394static void acpi_print_osc_error(acpi_handle handle,
395 struct acpi_osc_context *context, char *error)
396{
397 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
398 int i;
399
400 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
401 printk(KERN_DEBUG "%s\n", error);
402 else {
403 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
404 kfree(buffer.pointer);
405 }
406 printk(KERN_DEBUG"_OSC request data:");
407 for (i = 0; i < context->cap.length; i += sizeof(u32))
408 printk("%x ", *((u32 *)(context->cap.pointer + i)));
409 printk("\n");
410}
411
Shaohua Li70023de2009-10-29 11:04:28 +0800412static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
413{
414 int i;
415 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
416 24, 26, 28, 30, 32, 34};
417
418 if (strlen(str) != 36)
419 return AE_BAD_PARAMETER;
420 for (i = 0; i < 36; i++) {
421 if (i == 8 || i == 13 || i == 18 || i == 23) {
422 if (str[i] != '-')
423 return AE_BAD_PARAMETER;
424 } else if (!isxdigit(str[i]))
425 return AE_BAD_PARAMETER;
426 }
427 for (i = 0; i < 16; i++) {
Andy Shevchenko965fd9e2010-05-24 14:33:28 -0700428 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
429 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
Shaohua Li70023de2009-10-29 11:04:28 +0800430 }
431 return AE_OK;
432}
433
434acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
435{
436 acpi_status status;
437 struct acpi_object_list input;
438 union acpi_object in_params[4];
439 union acpi_object *out_obj;
440 u8 uuid[16];
441 u32 errors;
Shaohua Li9dc130f2009-12-23 17:04:11 +0800442 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
Shaohua Li70023de2009-10-29 11:04:28 +0800443
444 if (!context)
445 return AE_ERROR;
446 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
447 return AE_ERROR;
448 context->ret.length = ACPI_ALLOCATE_BUFFER;
449 context->ret.pointer = NULL;
450
451 /* Setting up input parameters */
452 input.count = 4;
453 input.pointer = in_params;
454 in_params[0].type = ACPI_TYPE_BUFFER;
455 in_params[0].buffer.length = 16;
456 in_params[0].buffer.pointer = uuid;
457 in_params[1].type = ACPI_TYPE_INTEGER;
458 in_params[1].integer.value = context->rev;
459 in_params[2].type = ACPI_TYPE_INTEGER;
460 in_params[2].integer.value = context->cap.length/sizeof(u32);
461 in_params[3].type = ACPI_TYPE_BUFFER;
462 in_params[3].buffer.length = context->cap.length;
463 in_params[3].buffer.pointer = context->cap.pointer;
464
Shaohua Li9dc130f2009-12-23 17:04:11 +0800465 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
Shaohua Li70023de2009-10-29 11:04:28 +0800466 if (ACPI_FAILURE(status))
467 return status;
468
Shaohua Li9dc130f2009-12-23 17:04:11 +0800469 if (!output.length)
Shaohua Li70023de2009-10-29 11:04:28 +0800470 return AE_NULL_OBJECT;
471
Shaohua Li9dc130f2009-12-23 17:04:11 +0800472 out_obj = output.pointer;
473 if (out_obj->type != ACPI_TYPE_BUFFER
474 || out_obj->buffer.length != context->cap.length) {
Shaohua Li70023de2009-10-29 11:04:28 +0800475 acpi_print_osc_error(handle, context,
476 "_OSC evaluation returned wrong type");
477 status = AE_TYPE;
478 goto out_kfree;
479 }
480 /* Need to ignore the bit0 in result code */
481 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
482 if (errors) {
483 if (errors & OSC_REQUEST_ERROR)
484 acpi_print_osc_error(handle, context,
485 "_OSC request failed");
486 if (errors & OSC_INVALID_UUID_ERROR)
487 acpi_print_osc_error(handle, context,
488 "_OSC invalid UUID");
489 if (errors & OSC_INVALID_REVISION_ERROR)
490 acpi_print_osc_error(handle, context,
491 "_OSC invalid revision");
492 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
493 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
494 & OSC_QUERY_ENABLE)
495 goto out_success;
496 status = AE_SUPPORT;
497 goto out_kfree;
498 }
499 status = AE_ERROR;
500 goto out_kfree;
501 }
502out_success:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800503 context->ret.length = out_obj->buffer.length;
504 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
505 if (!context->ret.pointer) {
506 status = AE_NO_MEMORY;
507 goto out_kfree;
508 }
509 memcpy(context->ret.pointer, out_obj->buffer.pointer,
510 context->ret.length);
511 status = AE_OK;
Shaohua Li70023de2009-10-29 11:04:28 +0800512
513out_kfree:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800514 kfree(output.pointer);
515 if (status != AE_OK)
516 context->ret.pointer = NULL;
Shaohua Li70023de2009-10-29 11:04:28 +0800517 return status;
518}
519EXPORT_SYMBOL(acpi_run_osc);
520
Shaohua Li3563ff92009-10-29 11:05:05 +0800521static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
522static void acpi_bus_osc_support(void)
523{
524 u32 capbuf[2];
525 struct acpi_osc_context context = {
526 .uuid_str = sb_uuid_str,
527 .rev = 1,
528 .cap.length = 8,
529 .cap.pointer = capbuf,
530 };
531 acpi_handle handle;
532
533 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
534 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800535#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
536 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
Shaohua Li3563ff92009-10-29 11:05:05 +0800537 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
538#endif
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800539
540#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
541 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
542#endif
Shaohua Li3563ff92009-10-29 11:05:05 +0800543 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
544 return;
545 if (ACPI_SUCCESS(acpi_run_osc(handle, &context)))
546 kfree(context.ret.pointer);
547 /* do we need to check the returned cap? Sounds no */
548}
549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550/* --------------------------------------------------------------------------
551 Event Management
552 -------------------------------------------------------------------------- */
553
Len Brown14e04fb2007-08-23 15:20:26 -0400554#ifdef CONFIG_ACPI_PROC_EVENT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555static DEFINE_SPINLOCK(acpi_bus_event_lock);
556
557LIST_HEAD(acpi_bus_event_list);
558DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
559
Len Brown4be44fc2005-08-05 00:44:28 -0400560extern int event_is_open;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400562int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400564 struct acpi_bus_event *event;
Len Brown4be44fc2005-08-05 00:44:28 -0400565 unsigned long flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 /* drop event on the floor if no one's listening */
568 if (!event_is_open)
Patrick Mocheld550d982006-06-27 00:41:40 -0400569 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Dan Carpenter5cc4a0f2010-04-27 00:23:37 +0200571 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 if (!event)
Patrick Mocheld550d982006-06-27 00:41:40 -0400573 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400575 strcpy(event->device_class, device_class);
576 strcpy(event->bus_id, bus_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 event->type = type;
578 event->data = data;
579
580 spin_lock_irqsave(&acpi_bus_event_lock, flags);
581 list_add_tail(&event->node, &acpi_bus_event_list);
582 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
583
584 wake_up_interruptible(&acpi_bus_event_queue);
585
Patrick Mocheld550d982006-06-27 00:41:40 -0400586 return 0;
Alexey Starikovskiy8db85d42007-09-26 19:43:16 +0400587
588}
589
590EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
591
592int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
593{
594 if (!device)
595 return -EINVAL;
596 return acpi_bus_generate_proc_event4(device->pnp.device_class,
597 device->pnp.bus_id, type, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
Len Brown4be44fc2005-08-05 00:44:28 -0400599
Len Brown14e04fb2007-08-23 15:20:26 -0400600EXPORT_SYMBOL(acpi_bus_generate_proc_event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Len Brown4be44fc2005-08-05 00:44:28 -0400602int acpi_bus_receive_event(struct acpi_bus_event *event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603{
Len Brown4be44fc2005-08-05 00:44:28 -0400604 unsigned long flags = 0;
605 struct acpi_bus_event *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
607 DECLARE_WAITQUEUE(wait, current);
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
610 if (!event)
Patrick Mocheld550d982006-06-27 00:41:40 -0400611 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 if (list_empty(&acpi_bus_event_list)) {
614
615 set_current_state(TASK_INTERRUPTIBLE);
616 add_wait_queue(&acpi_bus_event_queue, &wait);
617
618 if (list_empty(&acpi_bus_event_list))
619 schedule();
620
621 remove_wait_queue(&acpi_bus_event_queue, &wait);
622 set_current_state(TASK_RUNNING);
623
624 if (signal_pending(current))
Patrick Mocheld550d982006-06-27 00:41:40 -0400625 return -ERESTARTSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 }
627
628 spin_lock_irqsave(&acpi_bus_event_lock, flags);
Chuck Ebbertf0a37e02008-04-15 14:34:47 -0700629 if (!list_empty(&acpi_bus_event_list)) {
630 entry = list_entry(acpi_bus_event_list.next,
631 struct acpi_bus_event, node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 list_del(&entry->node);
Chuck Ebbertf0a37e02008-04-15 14:34:47 -0700633 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
635
636 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400637 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 memcpy(event, entry, sizeof(struct acpi_bus_event));
640
641 kfree(entry);
642
Patrick Mocheld550d982006-06-27 00:41:40 -0400643 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Len Brown14e04fb2007-08-23 15:20:26 -0400646#endif /* CONFIG_ACPI_PROC_EVENT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
648/* --------------------------------------------------------------------------
649 Notification Handling
650 -------------------------------------------------------------------------- */
651
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600652static void acpi_bus_check_device(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653{
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600654 struct acpi_device *device;
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600655 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 struct acpi_device_status old_status;
657
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600658 if (acpi_bus_get_device(handle, &device))
659 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 if (!device)
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600661 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 old_status = device->status;
664
665 /*
666 * Make sure this device's parent is present before we go about
667 * messing with the device.
668 */
669 if (device->parent && !device->parent->status.present) {
670 device->status = device->parent->status;
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600671 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 }
673
674 status = acpi_bus_get_status(device);
675 if (ACPI_FAILURE(status))
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600676 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
Bjorn Helgaascdd5b8c2009-05-22 11:43:51 -0600679 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 /*
682 * Device Insertion/Removal
683 */
684 if ((device->status.present) && !(old_status.present)) {
685 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
686 /* TBD: Handle device insertion */
Len Brown4be44fc2005-08-05 00:44:28 -0400687 } else if (!(device->status.present) && (old_status.present)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
689 /* TBD: Handle device removal */
690 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691}
692
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600693static void acpi_bus_check_scope(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 /* Status Change? */
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600696 acpi_bus_check_device(handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 /*
699 * TBD: Enumerate child devices within this device's scope and
700 * run acpi_bus_check_device()'s on them.
701 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702}
703
Shaohua Li6bd00a62008-08-28 10:04:29 +0800704static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
705int register_acpi_bus_notifier(struct notifier_block *nb)
706{
707 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
708}
709EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
710
711void unregister_acpi_bus_notifier(struct notifier_block *nb)
712{
713 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
714}
715EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717/**
718 * acpi_bus_notify
719 * ---------------
720 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
721 */
Len Brown4be44fc2005-08-05 00:44:28 -0400722static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723{
Len Brown4be44fc2005-08-05 00:44:28 -0400724 struct acpi_device *device = NULL;
Bjorn Helgaas6d278132009-04-30 09:35:37 -0600725 struct acpi_driver *driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Bjorn Helgaas02c37bd2009-05-22 11:43:41 -0600727 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
728 type, handle));
729
Shaohua Li6bd00a62008-08-28 10:04:29 +0800730 blocking_notifier_call_chain(&acpi_bus_notify_list,
731 type, (void *)handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 switch (type) {
734
735 case ACPI_NOTIFY_BUS_CHECK:
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600736 acpi_bus_check_scope(handle);
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500737 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 * TBD: We'll need to outsource certain events to non-ACPI
Len Brown4be44fc2005-08-05 00:44:28 -0400739 * drivers via the device manager (device.c).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 */
741 break;
742
743 case ACPI_NOTIFY_DEVICE_CHECK:
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600744 acpi_bus_check_device(handle);
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500745 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 * TBD: We'll need to outsource certain events to non-ACPI
Len Brown4be44fc2005-08-05 00:44:28 -0400747 * drivers via the device manager (device.c).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 */
749 break;
750
751 case ACPI_NOTIFY_DEVICE_WAKE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 /* TBD */
753 break;
754
755 case ACPI_NOTIFY_EJECT_REQUEST:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 /* TBD */
757 break;
758
759 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 /* TBD: Exactly what does 'light' mean? */
761 break;
762
763 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 /* TBD */
765 break;
766
767 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 /* TBD */
769 break;
770
771 case ACPI_NOTIFY_POWER_FAULT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 /* TBD */
773 break;
774
775 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400776 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
777 "Received unknown/unsupported notification [%08x]\n",
778 type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 break;
780 }
781
Bjorn Helgaasff754e22009-05-22 11:43:56 -0600782 acpi_bus_get_device(handle, &device);
783 if (device) {
784 driver = device->driver;
785 if (driver && driver->ops.notify &&
786 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
787 driver->ops.notify(device, type);
788 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789}
790
791/* --------------------------------------------------------------------------
792 Initialization/Cleanup
793 -------------------------------------------------------------------------- */
794
Len Brown4be44fc2005-08-05 00:44:28 -0400795static int __init acpi_bus_init_irq(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796{
Len Brown4be44fc2005-08-05 00:44:28 -0400797 acpi_status status = AE_OK;
798 union acpi_object arg = { ACPI_TYPE_INTEGER };
799 struct acpi_object_list arg_list = { 1, &arg };
800 char *message = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500803 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 * Let the system know what interrupt model we are using by
805 * evaluating the \_PIC object, if exists.
806 */
807
808 switch (acpi_irq_model) {
809 case ACPI_IRQ_MODEL_PIC:
810 message = "PIC";
811 break;
812 case ACPI_IRQ_MODEL_IOAPIC:
813 message = "IOAPIC";
814 break;
815 case ACPI_IRQ_MODEL_IOSAPIC:
816 message = "IOSAPIC";
817 break;
John Keller3948ec92006-12-22 11:50:04 -0600818 case ACPI_IRQ_MODEL_PLATFORM:
819 message = "platform specific model";
820 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 default:
822 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400823 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 }
825
826 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
827
828 arg.integer.value = acpi_irq_model;
829
830 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
831 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400832 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400833 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
835
Patrick Mocheld550d982006-06-27 00:41:40 -0400836 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837}
838
Bob Moore67a119f2008-06-10 13:42:13 +0800839u8 acpi_gbl_permanent_mmap;
Alexey Starikovskiyad718602007-02-02 19:48:19 +0300840
841
Len Brown4be44fc2005-08-05 00:44:28 -0400842void __init acpi_early_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843{
Len Brown4be44fc2005-08-05 00:44:28 -0400844 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400847 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Bob Moore616861242006-03-17 16:44:00 -0500849 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 /* enable workarounds, unless strict ACPI spec. compliance */
852 if (!acpi_strict)
853 acpi_gbl_enable_interpreter_slack = TRUE;
854
Alexey Starikovskiyad718602007-02-02 19:48:19 +0300855 acpi_gbl_permanent_mmap = 1;
856
Lin Mingaa2110c2010-04-08 14:34:27 +0800857 /*
858 * If the machine falls into the DMI check table,
859 * DSDT will be copied to memory
860 */
861 dmi_check_system(dsdt_dmi_table);
862
Alexey Starikovskiyad718602007-02-02 19:48:19 +0300863 status = acpi_reallocate_root_table();
864 if (ACPI_FAILURE(status)) {
865 printk(KERN_ERR PREFIX
866 "Unable to reallocate ACPI tables\n");
867 goto error0;
868 }
869
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 status = acpi_initialize_subsystem();
871 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400872 printk(KERN_ERR PREFIX
873 "Unable to initialize the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 goto error0;
875 }
876
877 status = acpi_load_tables();
878 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400879 printk(KERN_ERR PREFIX
880 "Unable to load the System Description Tables\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 goto error0;
882 }
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884#ifdef CONFIG_X86
885 if (!acpi_ioapic) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 /* compatible (0) means level (3) */
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300887 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
888 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
889 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
890 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 /* Set PIC-mode SCI trigger type */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300892 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300893 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 /*
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300896 * now that acpi_gbl_FADT is initialized,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 * update it with result from INT_SRC_OVR parsing
898 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300899 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 }
901#endif
902
Len Brown4be44fc2005-08-05 00:44:28 -0400903 status =
904 acpi_enable_subsystem(~
905 (ACPI_NO_HARDWARE_INIT |
906 ACPI_NO_ACPI_ENABLE));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (ACPI_FAILURE(status)) {
908 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
909 goto error0;
910 }
911
Patrick Mocheld550d982006-06-27 00:41:40 -0400912 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Len Brown4be44fc2005-08-05 00:44:28 -0400914 error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 disable_acpi();
Patrick Mocheld550d982006-06-27 00:41:40 -0400916 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917}
918
Len Brown4be44fc2005-08-05 00:44:28 -0400919static int __init acpi_bus_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920{
Len Brown4be44fc2005-08-05 00:44:28 -0400921 int result = 0;
922 acpi_status status = AE_OK;
923 extern acpi_status acpi_os_initialize1(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
Jiri Slaby176f9c12009-03-04 11:55:27 -0800925 acpi_os_initialize1();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
Len Brown4be44fc2005-08-05 00:44:28 -0400927 status =
928 acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400930 printk(KERN_ERR PREFIX
931 "Unable to start the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 goto error1;
933 }
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 /*
936 * ACPI 2.0 requires the EC driver to be loaded and work before
937 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
938 * is called).
939 *
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500940 * This is accomplished by looking for the ECDT table, and getting
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 * the EC parameters out of that.
942 */
943 status = acpi_ec_ecdt_probe();
944 /* Ignore result. Not having an ECDT is not fatal. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Shaohua Li3563ff92009-10-29 11:05:05 +0800946 acpi_bus_osc_support();
947
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
949 if (ACPI_FAILURE(status)) {
950 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
951 goto error1;
952 }
953
Zhang Ruib1d248d2010-10-26 10:06:54 +0800954 /*
955 * _PDC control method may load dynamic SSDT tables,
956 * and we need to install the table handler before that.
957 */
958 acpi_sysfs_init();
959
Alex Chiang78f16992009-12-20 12:19:09 -0700960 acpi_early_processor_set_pdc();
961
Zhao Yakui455c8792008-10-06 10:31:36 +0800962 /*
963 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
964 * is necessary to enable it as early as possible.
965 */
966 acpi_boot_ec_enable();
967
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 printk(KERN_INFO PREFIX "Interpreter enabled\n");
969
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500970 /* Initialize sleep structures */
971 acpi_sleep_init();
972
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 /*
974 * Get the system interrupt model and evaluate \_PIC.
975 */
976 result = acpi_bus_init_irq();
977 if (result)
978 goto error1;
979
980 /*
981 * Register the for all standard device notifications.
982 */
Len Brown4be44fc2005-08-05 00:44:28 -0400983 status =
984 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
985 &acpi_bus_notify, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400987 printk(KERN_ERR PREFIX
988 "Unable to register for device notifications\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 goto error1;
990 }
991
992 /*
993 * Create the top ACPI proc directory
994 */
995 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
996
Patrick Mocheld550d982006-06-27 00:41:40 -0400997 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 /* Mimic structured exception handling */
Len Brown4be44fc2005-08-05 00:44:28 -04001000 error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 acpi_terminate();
Patrick Mocheld550d982006-06-27 00:41:40 -04001002 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003}
1004
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001005struct kobject *acpi_kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
Len Brown4be44fc2005-08-05 00:44:28 -04001007static int __init acpi_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008{
Len Brown4be44fc2005-08-05 00:44:28 -04001009 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 if (acpi_disabled) {
1013 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001014 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 }
1016
Greg Kroah-Hartmanf62ed9e2007-11-05 13:16:15 -08001017 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001018 if (!acpi_kobj) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001019 printk(KERN_WARNING "%s: kset create error\n", __func__);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -07001020 acpi_kobj = NULL;
1021 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
Bjorn Helgaas0e465172009-03-24 16:50:09 -06001023 init_acpi_device_notify();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 result = acpi_bus_init();
1025
1026 if (!result) {
Robert Hancock7752d5c2008-02-15 01:27:20 -08001027 pci_mmcfg_late_init();
Len Brown9f9adec2007-12-13 17:38:03 -05001028 if (!(pm_flags & PM_APM))
1029 pm_flags |= PM_ACPI;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 else {
Len Brown4be44fc2005-08-05 00:44:28 -04001031 printk(KERN_INFO PREFIX
1032 "APM is already active, exiting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 disable_acpi();
1034 result = -ENODEV;
1035 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 } else
1037 disable_acpi();
Bjorn Helgaas81d02732009-03-24 16:49:38 -06001038
1039 if (acpi_disabled)
1040 return result;
1041
Bjorn Helgaase747f272009-03-24 16:49:43 -06001042 acpi_scan_init();
Bjorn Helgaasa5f820f2009-03-24 16:49:48 -06001043 acpi_ec_init();
Zhang Ruia25ee922010-07-15 10:46:15 +08001044 acpi_debugfs_init();
Bjorn Helgaas9cee43e2009-03-24 16:50:14 -06001045 acpi_sleep_proc_init();
Bjorn Helgaas201b8c62009-03-24 16:50:19 -06001046 acpi_wakeup_device_init();
Patrick Mocheld550d982006-06-27 00:41:40 -04001047 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
1050subsys_initcall(acpi_init);