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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>
28#include <linux/kernel.h>
29#include <linux/list.h>
30#include <linux/sched.h>
31#include <linux/pm.h>
32#include <linux/device.h>
33#include <linux/proc_fs.h>
34#include <linux/acpi.h>
35#include <linux/slab.h>
36#ifdef CONFIG_X86
37#include <asm/mpspec.h>
38#endif
39#include <linux/pci.h>
40#include <acpi/acpi_bus.h>
41#include <acpi/acpi_drivers.h>
42#include <acpi/apei.h>
43#include <linux/dmi.h>
44#include <linux/suspend.h>
45
46#include "internal.h"
47
48#define _COMPONENT ACPI_BUS_COMPONENT
49ACPI_MODULE_NAME("bus");
50
51struct acpi_device *acpi_root;
52struct proc_dir_entry *acpi_root_dir;
53EXPORT_SYMBOL(acpi_root_dir);
54
55#define STRUCT_TO_INT(s) (*((int*)&s))
56
57
58#ifdef CONFIG_X86
59static 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 /*
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
71 */
72 {
73 .callback = set_copy_dsdt,
74 .ident = "TOSHIBA Satellite",
75 .matches = {
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
78 },
79 },
80 {}
81};
82#else
83static struct dmi_system_id dsdt_dmi_table[] __initdata = {
84 {}
85};
86#endif
87
88/* --------------------------------------------------------------------------
89 Device Management
90 -------------------------------------------------------------------------- */
91
92int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
93{
94 acpi_status status = AE_OK;
95
96
97 if (!device)
98 return -EINVAL;
99
100 /* TBD: Support fixed-feature devices */
101
102 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
103 if (ACPI_FAILURE(status) || !*device) {
104 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
105 handle));
106 return -ENODEV;
107 }
108
109 return 0;
110}
111
112EXPORT_SYMBOL(acpi_bus_get_device);
113
114acpi_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
131int acpi_bus_get_status(struct acpi_device *device)
132{
133 acpi_status status;
134 unsigned long long sta;
135
136 status = acpi_bus_get_status_handle(device->handle, &sta);
137 if (ACPI_FAILURE(status))
138 return -ENODEV;
139
140 STRUCT_TO_INT(device->status) = (int) sta;
141
142 if (device->status.functional && !device->status.present) {
143 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)));
147 }
148
149 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
150 device->pnp.bus_id,
151 (u32) STRUCT_TO_INT(device->status)));
152 return 0;
153}
154EXPORT_SYMBOL(acpi_bus_get_status);
155
156void acpi_bus_private_data_handler(acpi_handle handle,
157 void *context)
158{
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
181/* --------------------------------------------------------------------------
182 Power Management
183 -------------------------------------------------------------------------- */
184
185static int __acpi_bus_get_power(struct acpi_device *device, int *state)
186{
187 int result = 0;
188 acpi_status status = 0;
189 unsigned long long psc = 0;
190
191 if (!device || !state)
192 return -EINVAL;
193
194 *state = ACPI_STATE_UNKNOWN;
195
196 if (device->flags.power_manageable) {
197 /*
198 * Get the device's power state either directly (via _PSC) or
199 * indirectly (via power resources).
200 */
201 if (device->power.flags.power_resources) {
202 result = acpi_power_get_inferred_state(device, state);
203 if (result)
204 return result;
205 } else if (device->power.flags.explicit_get) {
206 status = acpi_evaluate_integer(device->handle, "_PSC",
207 NULL, &psc);
208 if (ACPI_FAILURE(status))
209 return -ENODEV;
210 *state = (int)psc;
211 }
212 } else {
213 /* TBD: Non-recursive algorithm for walking up hierarchy. */
214 *state = device->parent ?
215 device->parent->power.state : ACPI_STATE_D0;
216 }
217
218 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
219 device->pnp.bus_id, *state));
220
221 return 0;
222}
223
224
225static int __acpi_bus_set_power(struct acpi_device *device, int state)
226{
227 int result = 0;
228 acpi_status status = AE_OK;
229 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
230
231 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
232 return -EINVAL;
233
234 /* Make sure this is a valid target state */
235
236 if (state == device->power.state) {
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
238 state));
239 return 0;
240 }
241
242 if (!device->power.states[state].flags.valid) {
243 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
244 return -ENODEV;
245 }
246 if (device->parent && (state < device->parent->power.state)) {
247 printk(KERN_WARNING PREFIX
248 "Cannot set device to a higher-powered"
249 " state than parent\n");
250 return -ENODEV;
251 }
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.
259 */
260 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) {
267 status = acpi_evaluate_object(device->handle,
268 object_name, NULL, NULL);
269 if (ACPI_FAILURE(status)) {
270 result = -ENODEV;
271 goto end;
272 }
273 }
274 } else {
275 if (device->power.states[state].flags.explicit_set) {
276 status = acpi_evaluate_object(device->handle,
277 object_name, NULL, NULL);
278 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
290 end:
291 if (result)
292 printk(KERN_WARNING PREFIX
293 "Device [%s] failed to transition to D%d\n",
294 device->pnp.bus_id, state);
295 else {
296 device->power.state = state;
297 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
298 "Device [%s] transitioned to D%d\n",
299 device->pnp.bus_id, state));
300 }
301
302 return result;
303}
304
305
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
322 return __acpi_bus_set_power(device, state);
323}
324EXPORT_SYMBOL(acpi_bus_set_power);
325
326
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
351int 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
374bool 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
385bool 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
396static 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
414static 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++) {
430 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]);
432 }
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;
444 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
445
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
467 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
468 if (ACPI_FAILURE(status))
469 return status;
470
471 if (!output.length)
472 return AE_NULL_OBJECT;
473
474 out_obj = output.pointer;
475 if (out_obj->type != ACPI_TYPE_BUFFER
476 || out_obj->buffer.length != context->cap.length) {
477 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:
505 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;
514
515out_kfree:
516 kfree(output.pointer);
517 if (status != AE_OK)
518 context->ret.pointer = NULL;
519 return status;
520}
521EXPORT_SYMBOL(acpi_run_osc);
522
523bool osc_sb_apei_support_acked;
524static 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 */
538#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
539 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
540 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
541#endif
542
543#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
544 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
545#endif
546
547 if (!ghes_disable)
548 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
549 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
550 return;
551 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;
556 kfree(context.ret.pointer);
557 }
558 /* do we need to check other returned cap? Sounds no */
559}
560
561/* --------------------------------------------------------------------------
562 Event Management
563 -------------------------------------------------------------------------- */
564
565#ifdef CONFIG_ACPI_PROC_EVENT
566static DEFINE_SPINLOCK(acpi_bus_event_lock);
567
568LIST_HEAD(acpi_bus_event_list);
569DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
570
571extern int event_is_open;
572
573int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
574{
575 struct acpi_bus_event *event;
576 unsigned long flags = 0;
577
578 /* drop event on the floor if no one's listening */
579 if (!event_is_open)
580 return 0;
581
582 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
583 if (!event)
584 return -ENOMEM;
585
586 strcpy(event->device_class, device_class);
587 strcpy(event->bus_id, bus_id);
588 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
597 return 0;
598
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);
609}
610
611EXPORT_SYMBOL(acpi_bus_generate_proc_event);
612
613int acpi_bus_receive_event(struct acpi_bus_event *event)
614{
615 unsigned long flags = 0;
616 struct acpi_bus_event *entry = NULL;
617
618 DECLARE_WAITQUEUE(wait, current);
619
620
621 if (!event)
622 return -EINVAL;
623
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))
636 return -ERESTARTSYS;
637 }
638
639 spin_lock_irqsave(&acpi_bus_event_lock, flags);
640 if (!list_empty(&acpi_bus_event_list)) {
641 entry = list_entry(acpi_bus_event_list.next,
642 struct acpi_bus_event, node);
643 list_del(&entry->node);
644 }
645 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
646
647 if (!entry)
648 return -ENODEV;
649
650 memcpy(event, entry, sizeof(struct acpi_bus_event));
651
652 kfree(entry);
653
654 return 0;
655}
656
657#endif /* CONFIG_ACPI_PROC_EVENT */
658
659/* --------------------------------------------------------------------------
660 Notification Handling
661 -------------------------------------------------------------------------- */
662
663static void acpi_bus_check_device(acpi_handle handle)
664{
665 struct acpi_device *device;
666 acpi_status status;
667 struct acpi_device_status old_status;
668
669 if (acpi_bus_get_device(handle, &device))
670 return;
671 if (!device)
672 return;
673
674 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;
682 return;
683 }
684
685 status = acpi_bus_get_status(device);
686 if (ACPI_FAILURE(status))
687 return;
688
689 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
690 return;
691
692 /*
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 */
698 } else if (!(device->status.present) && (old_status.present)) {
699 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
700 /* TBD: Handle device removal */
701 }
702}
703
704static void acpi_bus_check_scope(acpi_handle handle)
705{
706 /* Status Change? */
707 acpi_bus_check_device(handle);
708
709 /*
710 * TBD: Enumerate child devices within this device's scope and
711 * run acpi_bus_check_device()'s on them.
712 */
713}
714
715static 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
728/**
729 * acpi_bus_notify
730 * ---------------
731 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
732 */
733static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
734{
735 struct acpi_device *device = NULL;
736 struct acpi_driver *driver;
737
738 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
739 type, handle));
740
741 blocking_notifier_call_chain(&acpi_bus_notify_list,
742 type, (void *)handle);
743
744 switch (type) {
745
746 case ACPI_NOTIFY_BUS_CHECK:
747 acpi_bus_check_scope(handle);
748 /*
749 * TBD: We'll need to outsource certain events to non-ACPI
750 * drivers via the device manager (device.c).
751 */
752 break;
753
754 case ACPI_NOTIFY_DEVICE_CHECK:
755 acpi_bus_check_device(handle);
756 /*
757 * TBD: We'll need to outsource certain events to non-ACPI
758 * drivers via the device manager (device.c).
759 */
760 break;
761
762 case ACPI_NOTIFY_DEVICE_WAKE:
763 /* TBD */
764 break;
765
766 case ACPI_NOTIFY_EJECT_REQUEST:
767 /* TBD */
768 break;
769
770 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
771 /* TBD: Exactly what does 'light' mean? */
772 break;
773
774 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
775 /* TBD */
776 break;
777
778 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
779 /* TBD */
780 break;
781
782 case ACPI_NOTIFY_POWER_FAULT:
783 /* TBD */
784 break;
785
786 default:
787 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
788 "Received unknown/unsupported notification [%08x]\n",
789 type));
790 break;
791 }
792
793 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 }
800}
801
802/* --------------------------------------------------------------------------
803 Initialization/Cleanup
804 -------------------------------------------------------------------------- */
805
806static int __init acpi_bus_init_irq(void)
807{
808 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;
812
813
814 /*
815 * 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;
829 case ACPI_IRQ_MODEL_PLATFORM:
830 message = "platform specific model";
831 break;
832 default:
833 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
834 return -ENODEV;
835 }
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)) {
843 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
844 return -ENODEV;
845 }
846
847 return 0;
848}
849
850u8 acpi_gbl_permanent_mmap;
851
852
853void __init acpi_early_init(void)
854{
855 acpi_status status = AE_OK;
856
857 if (acpi_disabled)
858 return;
859
860 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
861
862 /* enable workarounds, unless strict ACPI spec. compliance */
863 if (!acpi_strict)
864 acpi_gbl_enable_interpreter_slack = TRUE;
865
866 acpi_gbl_permanent_mmap = 1;
867
868 /*
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
874 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
881 status = acpi_initialize_subsystem();
882 if (ACPI_FAILURE(status)) {
883 printk(KERN_ERR PREFIX
884 "Unable to initialize the ACPI Interpreter\n");
885 goto error0;
886 }
887
888 status = acpi_load_tables();
889 if (ACPI_FAILURE(status)) {
890 printk(KERN_ERR PREFIX
891 "Unable to load the System Description Tables\n");
892 goto error0;
893 }
894
895#ifdef CONFIG_X86
896 if (!acpi_ioapic) {
897 /* compatible (0) means level (3) */
898 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 }
902 /* Set PIC-mode SCI trigger type */
903 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
904 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
905 } else {
906 /*
907 * now that acpi_gbl_FADT is initialized,
908 * update it with result from INT_SRC_OVR parsing
909 */
910 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
911 }
912#endif
913
914 status =
915 acpi_enable_subsystem(~
916 (ACPI_NO_HARDWARE_INIT |
917 ACPI_NO_ACPI_ENABLE));
918 if (ACPI_FAILURE(status)) {
919 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
920 goto error0;
921 }
922
923 return;
924
925 error0:
926 disable_acpi();
927 return;
928}
929
930static int __init acpi_bus_init(void)
931{
932 int result = 0;
933 acpi_status status = AE_OK;
934 extern acpi_status acpi_os_initialize1(void);
935
936 acpi_os_initialize1();
937
938 status =
939 acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
940 if (ACPI_FAILURE(status)) {
941 printk(KERN_ERR PREFIX
942 "Unable to start the ACPI Interpreter\n");
943 goto error1;
944 }
945
946 /*
947 * ACPI 2.0 requires the EC driver to be loaded and work before
948 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
949 * is called).
950 *
951 * This is accomplished by looking for the ECDT table, and getting
952 * the EC parameters out of that.
953 */
954 status = acpi_ec_ecdt_probe();
955 /* Ignore result. Not having an ECDT is not fatal. */
956
957 acpi_bus_osc_support();
958
959 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
960 if (ACPI_FAILURE(status)) {
961 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
962 goto error1;
963 }
964
965 /*
966 * _PDC control method may load dynamic SSDT tables,
967 * and we need to install the table handler before that.
968 */
969 acpi_sysfs_init();
970
971 acpi_early_processor_set_pdc();
972
973 /*
974 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
975 * is necessary to enable it as early as possible.
976 */
977 acpi_boot_ec_enable();
978
979 printk(KERN_INFO PREFIX "Interpreter enabled\n");
980
981 /* Initialize sleep structures */
982 acpi_sleep_init();
983
984 /*
985 * Get the system interrupt model and evaluate \_PIC.
986 */
987 result = acpi_bus_init_irq();
988 if (result)
989 goto error1;
990
991 /*
992 * Register the for all standard device notifications.
993 */
994 status =
995 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
996 &acpi_bus_notify, NULL);
997 if (ACPI_FAILURE(status)) {
998 printk(KERN_ERR PREFIX
999 "Unable to register for device notifications\n");
1000 goto error1;
1001 }
1002
1003 /*
1004 * Create the top ACPI proc directory
1005 */
1006 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1007
1008 return 0;
1009
1010 /* Mimic structured exception handling */
1011 error1:
1012 acpi_terminate();
1013 return -ENODEV;
1014}
1015
1016struct kobject *acpi_kobj;
1017
1018static int __init acpi_init(void)
1019{
1020 int result;
1021
1022 if (acpi_disabled) {
1023 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1024 return -ENODEV;
1025 }
1026
1027 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1028 if (!acpi_kobj) {
1029 printk(KERN_WARNING "%s: kset create error\n", __func__);
1030 acpi_kobj = NULL;
1031 }
1032
1033 init_acpi_device_notify();
1034 result = acpi_bus_init();
1035 if (result) {
1036 disable_acpi();
1037 return result;
1038 }
1039
1040 pci_mmcfg_late_init();
1041 acpi_scan_init();
1042 acpi_ec_init();
1043 acpi_debugfs_init();
1044 acpi_sleep_proc_init();
1045 acpi_wakeup_device_init();
1046 return 0;
1047}
1048
1049subsys_initcall(acpi_init);
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/ioport.h>
24#include <linux/kernel.h>
25#include <linux/list.h>
26#include <linux/sched.h>
27#include <linux/pm.h>
28#include <linux/device.h>
29#include <linux/proc_fs.h>
30#include <linux/acpi.h>
31#include <linux/slab.h>
32#include <linux/regulator/machine.h>
33#ifdef CONFIG_X86
34#include <asm/mpspec.h>
35#endif
36#include <linux/pci.h>
37#include <acpi/apei.h>
38#include <linux/dmi.h>
39#include <linux/suspend.h>
40
41#include "internal.h"
42
43#define _COMPONENT ACPI_BUS_COMPONENT
44ACPI_MODULE_NAME("bus");
45
46struct acpi_device *acpi_root;
47struct proc_dir_entry *acpi_root_dir;
48EXPORT_SYMBOL(acpi_root_dir);
49
50#ifdef CONFIG_X86
51#ifdef CONFIG_ACPI_CUSTOM_DSDT
52static inline int set_copy_dsdt(const struct dmi_system_id *id)
53{
54 return 0;
55}
56#else
57static 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#endif
65
66static struct dmi_system_id dsdt_dmi_table[] __initdata = {
67 /*
68 * Invoke DSDT corruption work-around on all Toshiba Satellite.
69 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
70 */
71 {
72 .callback = set_copy_dsdt,
73 .ident = "TOSHIBA Satellite",
74 .matches = {
75 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
76 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
77 },
78 },
79 {}
80};
81#else
82static struct dmi_system_id dsdt_dmi_table[] __initdata = {
83 {}
84};
85#endif
86
87/* --------------------------------------------------------------------------
88 Device Management
89 -------------------------------------------------------------------------- */
90
91acpi_status acpi_bus_get_status_handle(acpi_handle handle,
92 unsigned long long *sta)
93{
94 acpi_status status;
95
96 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
97 if (ACPI_SUCCESS(status))
98 return AE_OK;
99
100 if (status == AE_NOT_FOUND) {
101 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
102 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
103 return AE_OK;
104 }
105 return status;
106}
107
108int acpi_bus_get_status(struct acpi_device *device)
109{
110 acpi_status status;
111 unsigned long long sta;
112
113 status = acpi_bus_get_status_handle(device->handle, &sta);
114 if (ACPI_FAILURE(status))
115 return -ENODEV;
116
117 acpi_set_device_status(device, sta);
118
119 if (device->status.functional && !device->status.present) {
120 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
121 "functional but not present;\n",
122 device->pnp.bus_id, (u32)sta));
123 }
124
125 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
126 device->pnp.bus_id, (u32)sta));
127 return 0;
128}
129EXPORT_SYMBOL(acpi_bus_get_status);
130
131void acpi_bus_private_data_handler(acpi_handle handle,
132 void *context)
133{
134 return;
135}
136EXPORT_SYMBOL(acpi_bus_private_data_handler);
137
138int acpi_bus_attach_private_data(acpi_handle handle, void *data)
139{
140 acpi_status status;
141
142 status = acpi_attach_data(handle,
143 acpi_bus_private_data_handler, data);
144 if (ACPI_FAILURE(status)) {
145 acpi_handle_debug(handle, "Error attaching device data\n");
146 return -ENODEV;
147 }
148
149 return 0;
150}
151EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
152
153int acpi_bus_get_private_data(acpi_handle handle, void **data)
154{
155 acpi_status status;
156
157 if (!*data)
158 return -EINVAL;
159
160 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
161 if (ACPI_FAILURE(status)) {
162 acpi_handle_debug(handle, "No context for object\n");
163 return -ENODEV;
164 }
165
166 return 0;
167}
168EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
169
170void acpi_bus_detach_private_data(acpi_handle handle)
171{
172 acpi_detach_data(handle, acpi_bus_private_data_handler);
173}
174EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
175
176static void acpi_print_osc_error(acpi_handle handle,
177 struct acpi_osc_context *context, char *error)
178{
179 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
180 int i;
181
182 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
183 printk(KERN_DEBUG "%s: %s\n", context->uuid_str, error);
184 else {
185 printk(KERN_DEBUG "%s (%s): %s\n",
186 (char *)buffer.pointer, context->uuid_str, error);
187 kfree(buffer.pointer);
188 }
189 printk(KERN_DEBUG "_OSC request data:");
190 for (i = 0; i < context->cap.length; i += sizeof(u32))
191 printk(" %x", *((u32 *)(context->cap.pointer + i)));
192 printk("\n");
193}
194
195acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
196{
197 int i;
198 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
199 24, 26, 28, 30, 32, 34};
200
201 if (strlen(str) != 36)
202 return AE_BAD_PARAMETER;
203 for (i = 0; i < 36; i++) {
204 if (i == 8 || i == 13 || i == 18 || i == 23) {
205 if (str[i] != '-')
206 return AE_BAD_PARAMETER;
207 } else if (!isxdigit(str[i]))
208 return AE_BAD_PARAMETER;
209 }
210 for (i = 0; i < 16; i++) {
211 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
212 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
213 }
214 return AE_OK;
215}
216EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
217
218acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
219{
220 acpi_status status;
221 struct acpi_object_list input;
222 union acpi_object in_params[4];
223 union acpi_object *out_obj;
224 u8 uuid[16];
225 u32 errors;
226 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
227
228 if (!context)
229 return AE_ERROR;
230 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
231 return AE_ERROR;
232 context->ret.length = ACPI_ALLOCATE_BUFFER;
233 context->ret.pointer = NULL;
234
235 /* Setting up input parameters */
236 input.count = 4;
237 input.pointer = in_params;
238 in_params[0].type = ACPI_TYPE_BUFFER;
239 in_params[0].buffer.length = 16;
240 in_params[0].buffer.pointer = uuid;
241 in_params[1].type = ACPI_TYPE_INTEGER;
242 in_params[1].integer.value = context->rev;
243 in_params[2].type = ACPI_TYPE_INTEGER;
244 in_params[2].integer.value = context->cap.length/sizeof(u32);
245 in_params[3].type = ACPI_TYPE_BUFFER;
246 in_params[3].buffer.length = context->cap.length;
247 in_params[3].buffer.pointer = context->cap.pointer;
248
249 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
250 if (ACPI_FAILURE(status))
251 return status;
252
253 if (!output.length)
254 return AE_NULL_OBJECT;
255
256 out_obj = output.pointer;
257 if (out_obj->type != ACPI_TYPE_BUFFER
258 || out_obj->buffer.length != context->cap.length) {
259 acpi_print_osc_error(handle, context,
260 "_OSC evaluation returned wrong type");
261 status = AE_TYPE;
262 goto out_kfree;
263 }
264 /* Need to ignore the bit0 in result code */
265 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
266 if (errors) {
267 if (errors & OSC_REQUEST_ERROR)
268 acpi_print_osc_error(handle, context,
269 "_OSC request failed");
270 if (errors & OSC_INVALID_UUID_ERROR)
271 acpi_print_osc_error(handle, context,
272 "_OSC invalid UUID");
273 if (errors & OSC_INVALID_REVISION_ERROR)
274 acpi_print_osc_error(handle, context,
275 "_OSC invalid revision");
276 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
277 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
278 & OSC_QUERY_ENABLE)
279 goto out_success;
280 status = AE_SUPPORT;
281 goto out_kfree;
282 }
283 status = AE_ERROR;
284 goto out_kfree;
285 }
286out_success:
287 context->ret.length = out_obj->buffer.length;
288 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
289 context->ret.length, GFP_KERNEL);
290 if (!context->ret.pointer) {
291 status = AE_NO_MEMORY;
292 goto out_kfree;
293 }
294 status = AE_OK;
295
296out_kfree:
297 kfree(output.pointer);
298 if (status != AE_OK)
299 context->ret.pointer = NULL;
300 return status;
301}
302EXPORT_SYMBOL(acpi_run_osc);
303
304bool osc_sb_apei_support_acked;
305static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
306static void acpi_bus_osc_support(void)
307{
308 u32 capbuf[2];
309 struct acpi_osc_context context = {
310 .uuid_str = sb_uuid_str,
311 .rev = 1,
312 .cap.length = 8,
313 .cap.pointer = capbuf,
314 };
315 acpi_handle handle;
316
317 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
318 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
319 if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR))
320 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
321 if (IS_ENABLED(CONFIG_ACPI_PROCESSOR))
322 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
323
324 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
325
326 if (!ghes_disable)
327 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
328 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
329 return;
330 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
331 u32 *capbuf_ret = context.ret.pointer;
332 if (context.ret.length > OSC_SUPPORT_DWORD)
333 osc_sb_apei_support_acked =
334 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
335 kfree(context.ret.pointer);
336 }
337 /* do we need to check other returned cap? Sounds no */
338}
339
340/* --------------------------------------------------------------------------
341 Notification Handling
342 -------------------------------------------------------------------------- */
343
344/**
345 * acpi_bus_notify
346 * ---------------
347 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
348 */
349static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
350{
351 struct acpi_device *adev;
352 struct acpi_driver *driver;
353 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
354 bool hotplug_event = false;
355
356 switch (type) {
357 case ACPI_NOTIFY_BUS_CHECK:
358 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
359 hotplug_event = true;
360 break;
361
362 case ACPI_NOTIFY_DEVICE_CHECK:
363 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
364 hotplug_event = true;
365 break;
366
367 case ACPI_NOTIFY_DEVICE_WAKE:
368 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
369 break;
370
371 case ACPI_NOTIFY_EJECT_REQUEST:
372 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
373 hotplug_event = true;
374 break;
375
376 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
377 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
378 /* TBD: Exactly what does 'light' mean? */
379 break;
380
381 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
382 acpi_handle_err(handle, "Device cannot be configured due "
383 "to a frequency mismatch\n");
384 break;
385
386 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
387 acpi_handle_err(handle, "Device cannot be configured due "
388 "to a bus mode mismatch\n");
389 break;
390
391 case ACPI_NOTIFY_POWER_FAULT:
392 acpi_handle_err(handle, "Device has suffered a power fault\n");
393 break;
394
395 default:
396 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
397 break;
398 }
399
400 adev = acpi_bus_get_acpi_device(handle);
401 if (!adev)
402 goto err;
403
404 driver = adev->driver;
405 if (driver && driver->ops.notify &&
406 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
407 driver->ops.notify(adev, type);
408
409 if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
410 return;
411
412 acpi_bus_put_acpi_device(adev);
413 return;
414
415 err:
416 acpi_evaluate_ost(handle, type, ost_code, NULL);
417}
418
419static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
420{
421 struct acpi_device *device = data;
422
423 device->driver->ops.notify(device, event);
424}
425
426static void acpi_device_notify_fixed(void *data)
427{
428 struct acpi_device *device = data;
429
430 /* Fixed hardware devices have no handles */
431 acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
432}
433
434static u32 acpi_device_fixed_event(void *data)
435{
436 acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
437 return ACPI_INTERRUPT_HANDLED;
438}
439
440static int acpi_device_install_notify_handler(struct acpi_device *device)
441{
442 acpi_status status;
443
444 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
445 status =
446 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
447 acpi_device_fixed_event,
448 device);
449 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
450 status =
451 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
452 acpi_device_fixed_event,
453 device);
454 else
455 status = acpi_install_notify_handler(device->handle,
456 ACPI_DEVICE_NOTIFY,
457 acpi_device_notify,
458 device);
459
460 if (ACPI_FAILURE(status))
461 return -EINVAL;
462 return 0;
463}
464
465static void acpi_device_remove_notify_handler(struct acpi_device *device)
466{
467 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
468 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
469 acpi_device_fixed_event);
470 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
471 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
472 acpi_device_fixed_event);
473 else
474 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
475 acpi_device_notify);
476}
477
478/* --------------------------------------------------------------------------
479 Device Matching
480 -------------------------------------------------------------------------- */
481
482/**
483 * acpi_get_first_physical_node - Get first physical node of an ACPI device
484 * @adev: ACPI device in question
485 *
486 * Return: First physical node of ACPI device @adev
487 */
488struct device *acpi_get_first_physical_node(struct acpi_device *adev)
489{
490 struct mutex *physical_node_lock = &adev->physical_node_lock;
491 struct device *phys_dev;
492
493 mutex_lock(physical_node_lock);
494 if (list_empty(&adev->physical_node_list)) {
495 phys_dev = NULL;
496 } else {
497 const struct acpi_device_physical_node *node;
498
499 node = list_first_entry(&adev->physical_node_list,
500 struct acpi_device_physical_node, node);
501
502 phys_dev = node->dev;
503 }
504 mutex_unlock(physical_node_lock);
505 return phys_dev;
506}
507
508static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev,
509 const struct device *dev)
510{
511 const struct device *phys_dev = acpi_get_first_physical_node(adev);
512
513 return phys_dev && phys_dev == dev ? adev : NULL;
514}
515
516/**
517 * acpi_device_is_first_physical_node - Is given dev first physical node
518 * @adev: ACPI companion device
519 * @dev: Physical device to check
520 *
521 * Function checks if given @dev is the first physical devices attached to
522 * the ACPI companion device. This distinction is needed in some cases
523 * where the same companion device is shared between many physical devices.
524 *
525 * Note that the caller have to provide valid @adev pointer.
526 */
527bool acpi_device_is_first_physical_node(struct acpi_device *adev,
528 const struct device *dev)
529{
530 return !!acpi_primary_dev_companion(adev, dev);
531}
532
533/*
534 * acpi_companion_match() - Can we match via ACPI companion device
535 * @dev: Device in question
536 *
537 * Check if the given device has an ACPI companion and if that companion has
538 * a valid list of PNP IDs, and if the device is the first (primary) physical
539 * device associated with it. Return the companion pointer if that's the case
540 * or NULL otherwise.
541 *
542 * If multiple physical devices are attached to a single ACPI companion, we need
543 * to be careful. The usage scenario for this kind of relationship is that all
544 * of the physical devices in question use resources provided by the ACPI
545 * companion. A typical case is an MFD device where all the sub-devices share
546 * the parent's ACPI companion. In such cases we can only allow the primary
547 * (first) physical device to be matched with the help of the companion's PNP
548 * IDs.
549 *
550 * Additional physical devices sharing the ACPI companion can still use
551 * resources available from it but they will be matched normally using functions
552 * provided by their bus types (and analogously for their modalias).
553 */
554struct acpi_device *acpi_companion_match(const struct device *dev)
555{
556 struct acpi_device *adev;
557
558 adev = ACPI_COMPANION(dev);
559 if (!adev)
560 return NULL;
561
562 if (list_empty(&adev->pnp.ids))
563 return NULL;
564
565 return acpi_primary_dev_companion(adev, dev);
566}
567
568/**
569 * acpi_of_match_device - Match device object using the "compatible" property.
570 * @adev: ACPI device object to match.
571 * @of_match_table: List of device IDs to match against.
572 *
573 * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
574 * identifiers and a _DSD object with the "compatible" property, use that
575 * property to match against the given list of identifiers.
576 */
577static bool acpi_of_match_device(struct acpi_device *adev,
578 const struct of_device_id *of_match_table)
579{
580 const union acpi_object *of_compatible, *obj;
581 int i, nval;
582
583 if (!adev)
584 return false;
585
586 of_compatible = adev->data.of_compatible;
587 if (!of_match_table || !of_compatible)
588 return false;
589
590 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
591 nval = of_compatible->package.count;
592 obj = of_compatible->package.elements;
593 } else { /* Must be ACPI_TYPE_STRING. */
594 nval = 1;
595 obj = of_compatible;
596 }
597 /* Now we can look for the driver DT compatible strings */
598 for (i = 0; i < nval; i++, obj++) {
599 const struct of_device_id *id;
600
601 for (id = of_match_table; id->compatible[0]; id++)
602 if (!strcasecmp(obj->string.pointer, id->compatible))
603 return true;
604 }
605
606 return false;
607}
608
609static bool __acpi_match_device_cls(const struct acpi_device_id *id,
610 struct acpi_hardware_id *hwid)
611{
612 int i, msk, byte_shift;
613 char buf[3];
614
615 if (!id->cls)
616 return false;
617
618 /* Apply class-code bitmask, before checking each class-code byte */
619 for (i = 1; i <= 3; i++) {
620 byte_shift = 8 * (3 - i);
621 msk = (id->cls_msk >> byte_shift) & 0xFF;
622 if (!msk)
623 continue;
624
625 sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
626 if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
627 return false;
628 }
629 return true;
630}
631
632static const struct acpi_device_id *__acpi_match_device(
633 struct acpi_device *device,
634 const struct acpi_device_id *ids,
635 const struct of_device_id *of_ids)
636{
637 const struct acpi_device_id *id;
638 struct acpi_hardware_id *hwid;
639
640 /*
641 * If the device is not present, it is unnecessary to load device
642 * driver for it.
643 */
644 if (!device || !device->status.present)
645 return NULL;
646
647 list_for_each_entry(hwid, &device->pnp.ids, list) {
648 /* First, check the ACPI/PNP IDs provided by the caller. */
649 for (id = ids; id->id[0] || id->cls; id++) {
650 if (id->id[0] && !strcmp((char *) id->id, hwid->id))
651 return id;
652 else if (id->cls && __acpi_match_device_cls(id, hwid))
653 return id;
654 }
655
656 /*
657 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
658 * "compatible" property if found.
659 *
660 * The id returned by the below is not valid, but the only
661 * caller passing non-NULL of_ids here is only interested in
662 * whether or not the return value is NULL.
663 */
664 if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
665 && acpi_of_match_device(device, of_ids))
666 return id;
667 }
668 return NULL;
669}
670
671/**
672 * acpi_match_device - Match a struct device against a given list of ACPI IDs
673 * @ids: Array of struct acpi_device_id object to match against.
674 * @dev: The device structure to match.
675 *
676 * Check if @dev has a valid ACPI handle and if there is a struct acpi_device
677 * object for that handle and use that object to match against a given list of
678 * device IDs.
679 *
680 * Return a pointer to the first matching ID on success or %NULL on failure.
681 */
682const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
683 const struct device *dev)
684{
685 return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
686}
687EXPORT_SYMBOL_GPL(acpi_match_device);
688
689int acpi_match_device_ids(struct acpi_device *device,
690 const struct acpi_device_id *ids)
691{
692 return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
693}
694EXPORT_SYMBOL(acpi_match_device_ids);
695
696bool acpi_driver_match_device(struct device *dev,
697 const struct device_driver *drv)
698{
699 if (!drv->acpi_match_table)
700 return acpi_of_match_device(ACPI_COMPANION(dev),
701 drv->of_match_table);
702
703 return !!__acpi_match_device(acpi_companion_match(dev),
704 drv->acpi_match_table, drv->of_match_table);
705}
706EXPORT_SYMBOL_GPL(acpi_driver_match_device);
707
708/* --------------------------------------------------------------------------
709 ACPI Driver Management
710 -------------------------------------------------------------------------- */
711
712/**
713 * acpi_bus_register_driver - register a driver with the ACPI bus
714 * @driver: driver being registered
715 *
716 * Registers a driver with the ACPI bus. Searches the namespace for all
717 * devices that match the driver's criteria and binds. Returns zero for
718 * success or a negative error status for failure.
719 */
720int acpi_bus_register_driver(struct acpi_driver *driver)
721{
722 int ret;
723
724 if (acpi_disabled)
725 return -ENODEV;
726 driver->drv.name = driver->name;
727 driver->drv.bus = &acpi_bus_type;
728 driver->drv.owner = driver->owner;
729
730 ret = driver_register(&driver->drv);
731 return ret;
732}
733
734EXPORT_SYMBOL(acpi_bus_register_driver);
735
736/**
737 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
738 * @driver: driver to unregister
739 *
740 * Unregisters a driver with the ACPI bus. Searches the namespace for all
741 * devices that match the driver's criteria and unbinds.
742 */
743void acpi_bus_unregister_driver(struct acpi_driver *driver)
744{
745 driver_unregister(&driver->drv);
746}
747
748EXPORT_SYMBOL(acpi_bus_unregister_driver);
749
750/* --------------------------------------------------------------------------
751 ACPI Bus operations
752 -------------------------------------------------------------------------- */
753
754static int acpi_bus_match(struct device *dev, struct device_driver *drv)
755{
756 struct acpi_device *acpi_dev = to_acpi_device(dev);
757 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
758
759 return acpi_dev->flags.match_driver
760 && !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
761}
762
763static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
764{
765 return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
766}
767
768static int acpi_device_probe(struct device *dev)
769{
770 struct acpi_device *acpi_dev = to_acpi_device(dev);
771 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
772 int ret;
773
774 if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
775 return -EINVAL;
776
777 if (!acpi_drv->ops.add)
778 return -ENOSYS;
779
780 ret = acpi_drv->ops.add(acpi_dev);
781 if (ret)
782 return ret;
783
784 acpi_dev->driver = acpi_drv;
785 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
786 "Driver [%s] successfully bound to device [%s]\n",
787 acpi_drv->name, acpi_dev->pnp.bus_id));
788
789 if (acpi_drv->ops.notify) {
790 ret = acpi_device_install_notify_handler(acpi_dev);
791 if (ret) {
792 if (acpi_drv->ops.remove)
793 acpi_drv->ops.remove(acpi_dev);
794
795 acpi_dev->driver = NULL;
796 acpi_dev->driver_data = NULL;
797 return ret;
798 }
799 }
800
801 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
802 acpi_drv->name, acpi_dev->pnp.bus_id));
803 get_device(dev);
804 return 0;
805}
806
807static int acpi_device_remove(struct device * dev)
808{
809 struct acpi_device *acpi_dev = to_acpi_device(dev);
810 struct acpi_driver *acpi_drv = acpi_dev->driver;
811
812 if (acpi_drv) {
813 if (acpi_drv->ops.notify)
814 acpi_device_remove_notify_handler(acpi_dev);
815 if (acpi_drv->ops.remove)
816 acpi_drv->ops.remove(acpi_dev);
817 }
818 acpi_dev->driver = NULL;
819 acpi_dev->driver_data = NULL;
820
821 put_device(dev);
822 return 0;
823}
824
825struct bus_type acpi_bus_type = {
826 .name = "acpi",
827 .match = acpi_bus_match,
828 .probe = acpi_device_probe,
829 .remove = acpi_device_remove,
830 .uevent = acpi_device_uevent,
831};
832
833/* --------------------------------------------------------------------------
834 Initialization/Cleanup
835 -------------------------------------------------------------------------- */
836
837static int __init acpi_bus_init_irq(void)
838{
839 acpi_status status;
840 char *message = NULL;
841
842
843 /*
844 * Let the system know what interrupt model we are using by
845 * evaluating the \_PIC object, if exists.
846 */
847
848 switch (acpi_irq_model) {
849 case ACPI_IRQ_MODEL_PIC:
850 message = "PIC";
851 break;
852 case ACPI_IRQ_MODEL_IOAPIC:
853 message = "IOAPIC";
854 break;
855 case ACPI_IRQ_MODEL_IOSAPIC:
856 message = "IOSAPIC";
857 break;
858 case ACPI_IRQ_MODEL_GIC:
859 message = "GIC";
860 break;
861 case ACPI_IRQ_MODEL_PLATFORM:
862 message = "platform specific model";
863 break;
864 default:
865 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
866 return -ENODEV;
867 }
868
869 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
870
871 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
872 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
873 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
874 return -ENODEV;
875 }
876
877 return 0;
878}
879
880/**
881 * acpi_early_init - Initialize ACPICA and populate the ACPI namespace.
882 *
883 * The ACPI tables are accessible after this, but the handling of events has not
884 * been initialized and the global lock is not available yet, so AML should not
885 * be executed at this point.
886 *
887 * Doing this before switching the EFI runtime services to virtual mode allows
888 * the EfiBootServices memory to be freed slightly earlier on boot.
889 */
890void __init acpi_early_init(void)
891{
892 acpi_status status;
893
894 if (acpi_disabled)
895 return;
896
897 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
898
899 /* It's safe to verify table checksums during late stage */
900 acpi_gbl_verify_table_checksum = TRUE;
901
902 /* enable workarounds, unless strict ACPI spec. compliance */
903 if (!acpi_strict)
904 acpi_gbl_enable_interpreter_slack = TRUE;
905
906 acpi_gbl_permanent_mmap = 1;
907
908 /*
909 * If the machine falls into the DMI check table,
910 * DSDT will be copied to memory
911 */
912 dmi_check_system(dsdt_dmi_table);
913
914 status = acpi_reallocate_root_table();
915 if (ACPI_FAILURE(status)) {
916 printk(KERN_ERR PREFIX
917 "Unable to reallocate ACPI tables\n");
918 goto error0;
919 }
920
921 status = acpi_initialize_subsystem();
922 if (ACPI_FAILURE(status)) {
923 printk(KERN_ERR PREFIX
924 "Unable to initialize the ACPI Interpreter\n");
925 goto error0;
926 }
927
928 status = acpi_load_tables();
929 if (ACPI_FAILURE(status)) {
930 printk(KERN_ERR PREFIX
931 "Unable to load the System Description Tables\n");
932 goto error0;
933 }
934
935#ifdef CONFIG_X86
936 if (!acpi_ioapic) {
937 /* compatible (0) means level (3) */
938 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
939 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
940 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
941 }
942 /* Set PIC-mode SCI trigger type */
943 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
944 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
945 } else {
946 /*
947 * now that acpi_gbl_FADT is initialized,
948 * update it with result from INT_SRC_OVR parsing
949 */
950 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
951 }
952#endif
953 return;
954
955 error0:
956 disable_acpi();
957}
958
959/**
960 * acpi_subsystem_init - Finalize the early initialization of ACPI.
961 *
962 * Switch over the platform to the ACPI mode (if possible), initialize the
963 * handling of ACPI events, install the interrupt and global lock handlers.
964 *
965 * Doing this too early is generally unsafe, but at the same time it needs to be
966 * done before all things that really depend on ACPI. The right spot appears to
967 * be before finalizing the EFI initialization.
968 */
969void __init acpi_subsystem_init(void)
970{
971 acpi_status status;
972
973 if (acpi_disabled)
974 return;
975
976 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
977 if (ACPI_FAILURE(status)) {
978 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
979 disable_acpi();
980 } else {
981 /*
982 * If the system is using ACPI then we can be reasonably
983 * confident that any regulators are managed by the firmware
984 * so tell the regulator core it has everything it needs to
985 * know.
986 */
987 regulator_has_full_constraints();
988 }
989}
990
991static int __init acpi_bus_init(void)
992{
993 int result;
994 acpi_status status;
995
996 acpi_os_initialize1();
997
998 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
999 if (ACPI_FAILURE(status)) {
1000 printk(KERN_ERR PREFIX
1001 "Unable to start the ACPI Interpreter\n");
1002 goto error1;
1003 }
1004
1005 /*
1006 * ACPI 2.0 requires the EC driver to be loaded and work before
1007 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
1008 * is called).
1009 *
1010 * This is accomplished by looking for the ECDT table, and getting
1011 * the EC parameters out of that.
1012 */
1013 status = acpi_ec_ecdt_probe();
1014 /* Ignore result. Not having an ECDT is not fatal. */
1015
1016 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
1017 if (ACPI_FAILURE(status)) {
1018 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
1019 goto error1;
1020 }
1021
1022 /* Set capability bits for _OSC under processor scope */
1023 acpi_early_processor_osc();
1024
1025 /*
1026 * _OSC method may exist in module level code,
1027 * so it must be run after ACPI_FULL_INITIALIZATION
1028 */
1029 acpi_bus_osc_support();
1030
1031 /*
1032 * _PDC control method may load dynamic SSDT tables,
1033 * and we need to install the table handler before that.
1034 */
1035 acpi_sysfs_init();
1036
1037 acpi_early_processor_set_pdc();
1038
1039 /*
1040 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
1041 * is necessary to enable it as early as possible.
1042 */
1043 acpi_boot_ec_enable();
1044
1045 printk(KERN_INFO PREFIX "Interpreter enabled\n");
1046
1047 /* Initialize sleep structures */
1048 acpi_sleep_init();
1049
1050 /*
1051 * Get the system interrupt model and evaluate \_PIC.
1052 */
1053 result = acpi_bus_init_irq();
1054 if (result)
1055 goto error1;
1056
1057 /*
1058 * Register the for all standard device notifications.
1059 */
1060 status =
1061 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
1062 &acpi_bus_notify, NULL);
1063 if (ACPI_FAILURE(status)) {
1064 printk(KERN_ERR PREFIX
1065 "Unable to register for device notifications\n");
1066 goto error1;
1067 }
1068
1069 /*
1070 * Create the top ACPI proc directory
1071 */
1072 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1073
1074 result = bus_register(&acpi_bus_type);
1075 if (!result)
1076 return 0;
1077
1078 /* Mimic structured exception handling */
1079 error1:
1080 acpi_terminate();
1081 return -ENODEV;
1082}
1083
1084struct kobject *acpi_kobj;
1085EXPORT_SYMBOL_GPL(acpi_kobj);
1086
1087static int __init acpi_init(void)
1088{
1089 int result;
1090
1091 if (acpi_disabled) {
1092 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1093 return -ENODEV;
1094 }
1095
1096 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1097 if (!acpi_kobj) {
1098 printk(KERN_WARNING "%s: kset create error\n", __func__);
1099 acpi_kobj = NULL;
1100 }
1101
1102 init_acpi_device_notify();
1103 result = acpi_bus_init();
1104 if (result) {
1105 disable_acpi();
1106 return result;
1107 }
1108
1109 pci_mmcfg_late_init();
1110 acpi_scan_init();
1111 acpi_ec_init();
1112 acpi_debugfs_init();
1113 acpi_sleep_proc_init();
1114 acpi_wakeup_device_init();
1115 acpi_debugger_init();
1116 return 0;
1117}
1118
1119subsys_initcall(acpi_init);