2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
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>
34 #include <asm/mpspec.h>
36 #include <linux/pci.h>
37 #include <acpi/apei.h>
38 #include <linux/dmi.h>
39 #include <linux/suspend.h>
43 #define _COMPONENT ACPI_BUS_COMPONENT
44 ACPI_MODULE_NAME("bus");
46 struct acpi_device *acpi_root;
47 struct proc_dir_entry *acpi_root_dir;
48 EXPORT_SYMBOL(acpi_root_dir);
51 #ifdef CONFIG_ACPI_CUSTOM_DSDT
52 static inline int set_copy_dsdt(const struct dmi_system_id *id)
57 static int set_copy_dsdt(const struct dmi_system_id *id)
59 printk(KERN_NOTICE "%s detected - "
60 "force copy of DSDT to local memory\n", id->ident);
61 acpi_gbl_copy_dsdt_locally = 1;
66 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
68 * Invoke DSDT corruption work-around on all Toshiba Satellite.
69 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
72 .callback = set_copy_dsdt,
73 .ident = "TOSHIBA Satellite",
75 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
76 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
82 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
87 /* --------------------------------------------------------------------------
89 -------------------------------------------------------------------------- */
91 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
92 unsigned long long *sta)
96 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
97 if (ACPI_SUCCESS(status))
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;
108 int acpi_bus_get_status(struct acpi_device *device)
111 unsigned long long sta;
113 status = acpi_bus_get_status_handle(device->handle, &sta);
114 if (ACPI_FAILURE(status))
117 acpi_set_device_status(device, sta);
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));
125 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
126 device->pnp.bus_id, (u32)sta));
129 EXPORT_SYMBOL(acpi_bus_get_status);
131 void acpi_bus_private_data_handler(acpi_handle handle,
136 EXPORT_SYMBOL(acpi_bus_private_data_handler);
138 int acpi_bus_attach_private_data(acpi_handle handle, void *data)
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");
151 EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
153 int acpi_bus_get_private_data(acpi_handle handle, void **data)
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");
168 EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
170 void acpi_bus_detach_private_data(acpi_handle handle)
172 acpi_detach_data(handle, acpi_bus_private_data_handler);
174 EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
176 static void acpi_print_osc_error(acpi_handle handle,
177 struct acpi_osc_context *context, char *error)
179 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
182 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
183 printk(KERN_DEBUG "%s\n", error);
185 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
186 kfree(buffer.pointer);
188 printk(KERN_DEBUG"_OSC request data:");
189 for (i = 0; i < context->cap.length; i += sizeof(u32))
190 printk("%x ", *((u32 *)(context->cap.pointer + i)));
194 acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
197 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
198 24, 26, 28, 30, 32, 34};
200 if (strlen(str) != 36)
201 return AE_BAD_PARAMETER;
202 for (i = 0; i < 36; i++) {
203 if (i == 8 || i == 13 || i == 18 || i == 23) {
205 return AE_BAD_PARAMETER;
206 } else if (!isxdigit(str[i]))
207 return AE_BAD_PARAMETER;
209 for (i = 0; i < 16; i++) {
210 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
211 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
215 EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
217 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
220 struct acpi_object_list input;
221 union acpi_object in_params[4];
222 union acpi_object *out_obj;
225 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
229 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
231 context->ret.length = ACPI_ALLOCATE_BUFFER;
232 context->ret.pointer = NULL;
234 /* Setting up input parameters */
236 input.pointer = in_params;
237 in_params[0].type = ACPI_TYPE_BUFFER;
238 in_params[0].buffer.length = 16;
239 in_params[0].buffer.pointer = uuid;
240 in_params[1].type = ACPI_TYPE_INTEGER;
241 in_params[1].integer.value = context->rev;
242 in_params[2].type = ACPI_TYPE_INTEGER;
243 in_params[2].integer.value = context->cap.length/sizeof(u32);
244 in_params[3].type = ACPI_TYPE_BUFFER;
245 in_params[3].buffer.length = context->cap.length;
246 in_params[3].buffer.pointer = context->cap.pointer;
248 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
249 if (ACPI_FAILURE(status))
253 return AE_NULL_OBJECT;
255 out_obj = output.pointer;
256 if (out_obj->type != ACPI_TYPE_BUFFER
257 || out_obj->buffer.length != context->cap.length) {
258 acpi_print_osc_error(handle, context,
259 "_OSC evaluation returned wrong type");
263 /* Need to ignore the bit0 in result code */
264 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
266 if (errors & OSC_REQUEST_ERROR)
267 acpi_print_osc_error(handle, context,
268 "_OSC request failed");
269 if (errors & OSC_INVALID_UUID_ERROR)
270 acpi_print_osc_error(handle, context,
271 "_OSC invalid UUID");
272 if (errors & OSC_INVALID_REVISION_ERROR)
273 acpi_print_osc_error(handle, context,
274 "_OSC invalid revision");
275 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
276 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
286 context->ret.length = out_obj->buffer.length;
287 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
288 context->ret.length, GFP_KERNEL);
289 if (!context->ret.pointer) {
290 status = AE_NO_MEMORY;
296 kfree(output.pointer);
298 context->ret.pointer = NULL;
301 EXPORT_SYMBOL(acpi_run_osc);
303 bool osc_sb_apei_support_acked;
304 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
305 static void acpi_bus_osc_support(void)
308 struct acpi_osc_context context = {
309 .uuid_str = sb_uuid_str,
312 .cap.pointer = capbuf,
316 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
317 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
318 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
319 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
320 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
323 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
324 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
327 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
330 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
331 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
333 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
334 u32 *capbuf_ret = context.ret.pointer;
335 if (context.ret.length > OSC_SUPPORT_DWORD)
336 osc_sb_apei_support_acked =
337 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
338 kfree(context.ret.pointer);
340 /* do we need to check other returned cap? Sounds no */
343 /* --------------------------------------------------------------------------
344 Notification Handling
345 -------------------------------------------------------------------------- */
350 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
352 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
354 struct acpi_device *adev;
355 struct acpi_driver *driver;
356 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
357 bool hotplug_event = false;
360 case ACPI_NOTIFY_BUS_CHECK:
361 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
362 hotplug_event = true;
365 case ACPI_NOTIFY_DEVICE_CHECK:
366 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
367 hotplug_event = true;
370 case ACPI_NOTIFY_DEVICE_WAKE:
371 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
374 case ACPI_NOTIFY_EJECT_REQUEST:
375 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
376 hotplug_event = true;
379 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
380 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
381 /* TBD: Exactly what does 'light' mean? */
384 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
385 acpi_handle_err(handle, "Device cannot be configured due "
386 "to a frequency mismatch\n");
389 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
390 acpi_handle_err(handle, "Device cannot be configured due "
391 "to a bus mode mismatch\n");
394 case ACPI_NOTIFY_POWER_FAULT:
395 acpi_handle_err(handle, "Device has suffered a power fault\n");
399 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
403 adev = acpi_bus_get_acpi_device(handle);
407 driver = adev->driver;
408 if (driver && driver->ops.notify &&
409 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
410 driver->ops.notify(adev, type);
412 if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
415 acpi_bus_put_acpi_device(adev);
419 acpi_evaluate_ost(handle, type, ost_code, NULL);
422 static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
424 struct acpi_device *device = data;
426 device->driver->ops.notify(device, event);
429 static void acpi_device_notify_fixed(void *data)
431 struct acpi_device *device = data;
433 /* Fixed hardware devices have no handles */
434 acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
437 static u32 acpi_device_fixed_event(void *data)
439 acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
440 return ACPI_INTERRUPT_HANDLED;
443 static int acpi_device_install_notify_handler(struct acpi_device *device)
447 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
449 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
450 acpi_device_fixed_event,
452 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
454 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
455 acpi_device_fixed_event,
458 status = acpi_install_notify_handler(device->handle,
463 if (ACPI_FAILURE(status))
468 static void acpi_device_remove_notify_handler(struct acpi_device *device)
470 if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
471 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
472 acpi_device_fixed_event);
473 else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
474 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
475 acpi_device_fixed_event);
477 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
481 /* --------------------------------------------------------------------------
483 -------------------------------------------------------------------------- */
486 * acpi_companion_match() - Can we match via ACPI companion device
487 * @dev: Device in question
489 * Check if the given device has an ACPI companion and if that companion has
490 * a valid list of PNP IDs, and if the device is the first (primary) physical
491 * device associated with it. Return the companion pointer if that's the case
494 * If multiple physical devices are attached to a single ACPI companion, we need
495 * to be careful. The usage scenario for this kind of relationship is that all
496 * of the physical devices in question use resources provided by the ACPI
497 * companion. A typical case is an MFD device where all the sub-devices share
498 * the parent's ACPI companion. In such cases we can only allow the primary
499 * (first) physical device to be matched with the help of the companion's PNP
502 * Additional physical devices sharing the ACPI companion can still use
503 * resources available from it but they will be matched normally using functions
504 * provided by their bus types (and analogously for their modalias).
506 struct acpi_device *acpi_companion_match(const struct device *dev)
508 struct acpi_device *adev;
509 struct mutex *physical_node_lock;
511 adev = ACPI_COMPANION(dev);
515 if (list_empty(&adev->pnp.ids))
518 physical_node_lock = &adev->physical_node_lock;
519 mutex_lock(physical_node_lock);
520 if (list_empty(&adev->physical_node_list)) {
523 const struct acpi_device_physical_node *node;
525 node = list_first_entry(&adev->physical_node_list,
526 struct acpi_device_physical_node, node);
527 if (node->dev != dev)
530 mutex_unlock(physical_node_lock);
536 * acpi_of_match_device - Match device object using the "compatible" property.
537 * @adev: ACPI device object to match.
538 * @of_match_table: List of device IDs to match against.
540 * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
541 * identifiers and a _DSD object with the "compatible" property, use that
542 * property to match against the given list of identifiers.
544 static bool acpi_of_match_device(struct acpi_device *adev,
545 const struct of_device_id *of_match_table)
547 const union acpi_object *of_compatible, *obj;
553 of_compatible = adev->data.of_compatible;
554 if (!of_match_table || !of_compatible)
557 if (of_compatible->type == ACPI_TYPE_PACKAGE) {
558 nval = of_compatible->package.count;
559 obj = of_compatible->package.elements;
560 } else { /* Must be ACPI_TYPE_STRING. */
564 /* Now we can look for the driver DT compatible strings */
565 for (i = 0; i < nval; i++, obj++) {
566 const struct of_device_id *id;
568 for (id = of_match_table; id->compatible[0]; id++)
569 if (!strcasecmp(obj->string.pointer, id->compatible))
576 static bool __acpi_match_device_cls(const struct acpi_device_id *id,
577 struct acpi_hardware_id *hwid)
579 int i, msk, byte_shift;
585 /* Apply class-code bitmask, before checking each class-code byte */
586 for (i = 1; i <= 3; i++) {
587 byte_shift = 8 * (3 - i);
588 msk = (id->cls_msk >> byte_shift) & 0xFF;
592 sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
593 if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
599 static const struct acpi_device_id *__acpi_match_device(
600 struct acpi_device *device,
601 const struct acpi_device_id *ids,
602 const struct of_device_id *of_ids)
604 const struct acpi_device_id *id;
605 struct acpi_hardware_id *hwid;
608 * If the device is not present, it is unnecessary to load device
611 if (!device || !device->status.present)
614 list_for_each_entry(hwid, &device->pnp.ids, list) {
615 /* First, check the ACPI/PNP IDs provided by the caller. */
616 for (id = ids; id->id[0] || id->cls; id++) {
617 if (id->id[0] && !strcmp((char *) id->id, hwid->id))
619 else if (id->cls && __acpi_match_device_cls(id, hwid))
624 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
625 * "compatible" property if found.
627 * The id returned by the below is not valid, but the only
628 * caller passing non-NULL of_ids here is only interested in
629 * whether or not the return value is NULL.
631 if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
632 && acpi_of_match_device(device, of_ids))
639 * acpi_match_device - Match a struct device against a given list of ACPI IDs
640 * @ids: Array of struct acpi_device_id object to match against.
641 * @dev: The device structure to match.
643 * Check if @dev has a valid ACPI handle and if there is a struct acpi_device
644 * object for that handle and use that object to match against a given list of
647 * Return a pointer to the first matching ID on success or %NULL on failure.
649 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
650 const struct device *dev)
652 return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
654 EXPORT_SYMBOL_GPL(acpi_match_device);
656 int acpi_match_device_ids(struct acpi_device *device,
657 const struct acpi_device_id *ids)
659 return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
661 EXPORT_SYMBOL(acpi_match_device_ids);
663 bool acpi_driver_match_device(struct device *dev,
664 const struct device_driver *drv)
666 if (!drv->acpi_match_table)
667 return acpi_of_match_device(ACPI_COMPANION(dev),
668 drv->of_match_table);
670 return !!__acpi_match_device(acpi_companion_match(dev),
671 drv->acpi_match_table, drv->of_match_table);
673 EXPORT_SYMBOL_GPL(acpi_driver_match_device);
675 /* --------------------------------------------------------------------------
676 ACPI Driver Management
677 -------------------------------------------------------------------------- */
680 * acpi_bus_register_driver - register a driver with the ACPI bus
681 * @driver: driver being registered
683 * Registers a driver with the ACPI bus. Searches the namespace for all
684 * devices that match the driver's criteria and binds. Returns zero for
685 * success or a negative error status for failure.
687 int acpi_bus_register_driver(struct acpi_driver *driver)
693 driver->drv.name = driver->name;
694 driver->drv.bus = &acpi_bus_type;
695 driver->drv.owner = driver->owner;
697 ret = driver_register(&driver->drv);
701 EXPORT_SYMBOL(acpi_bus_register_driver);
704 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
705 * @driver: driver to unregister
707 * Unregisters a driver with the ACPI bus. Searches the namespace for all
708 * devices that match the driver's criteria and unbinds.
710 void acpi_bus_unregister_driver(struct acpi_driver *driver)
712 driver_unregister(&driver->drv);
715 EXPORT_SYMBOL(acpi_bus_unregister_driver);
717 /* --------------------------------------------------------------------------
719 -------------------------------------------------------------------------- */
721 static int acpi_bus_match(struct device *dev, struct device_driver *drv)
723 struct acpi_device *acpi_dev = to_acpi_device(dev);
724 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
726 return acpi_dev->flags.match_driver
727 && !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
730 static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
732 return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
735 static int acpi_device_probe(struct device *dev)
737 struct acpi_device *acpi_dev = to_acpi_device(dev);
738 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
741 if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
744 if (!acpi_drv->ops.add)
747 ret = acpi_drv->ops.add(acpi_dev);
751 acpi_dev->driver = acpi_drv;
752 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
753 "Driver [%s] successfully bound to device [%s]\n",
754 acpi_drv->name, acpi_dev->pnp.bus_id));
756 if (acpi_drv->ops.notify) {
757 ret = acpi_device_install_notify_handler(acpi_dev);
759 if (acpi_drv->ops.remove)
760 acpi_drv->ops.remove(acpi_dev);
762 acpi_dev->driver = NULL;
763 acpi_dev->driver_data = NULL;
768 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
769 acpi_drv->name, acpi_dev->pnp.bus_id));
774 static int acpi_device_remove(struct device * dev)
776 struct acpi_device *acpi_dev = to_acpi_device(dev);
777 struct acpi_driver *acpi_drv = acpi_dev->driver;
780 if (acpi_drv->ops.notify)
781 acpi_device_remove_notify_handler(acpi_dev);
782 if (acpi_drv->ops.remove)
783 acpi_drv->ops.remove(acpi_dev);
785 acpi_dev->driver = NULL;
786 acpi_dev->driver_data = NULL;
792 struct bus_type acpi_bus_type = {
794 .match = acpi_bus_match,
795 .probe = acpi_device_probe,
796 .remove = acpi_device_remove,
797 .uevent = acpi_device_uevent,
800 /* --------------------------------------------------------------------------
801 Initialization/Cleanup
802 -------------------------------------------------------------------------- */
804 static int __init acpi_bus_init_irq(void)
807 char *message = NULL;
811 * Let the system know what interrupt model we are using by
812 * evaluating the \_PIC object, if exists.
815 switch (acpi_irq_model) {
816 case ACPI_IRQ_MODEL_PIC:
819 case ACPI_IRQ_MODEL_IOAPIC:
822 case ACPI_IRQ_MODEL_IOSAPIC:
825 case ACPI_IRQ_MODEL_GIC:
828 case ACPI_IRQ_MODEL_PLATFORM:
829 message = "platform specific model";
832 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
836 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
838 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
839 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
840 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
848 * acpi_early_init - Initialize ACPICA and populate the ACPI namespace.
850 * The ACPI tables are accessible after this, but the handling of events has not
851 * been initialized and the global lock is not available yet, so AML should not
852 * be executed at this point.
854 * Doing this before switching the EFI runtime services to virtual mode allows
855 * the EfiBootServices memory to be freed slightly earlier on boot.
857 void __init acpi_early_init(void)
864 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
866 /* It's safe to verify table checksums during late stage */
867 acpi_gbl_verify_table_checksum = TRUE;
869 /* enable workarounds, unless strict ACPI spec. compliance */
871 acpi_gbl_enable_interpreter_slack = TRUE;
873 acpi_gbl_permanent_mmap = 1;
876 * If the machine falls into the DMI check table,
877 * DSDT will be copied to memory
879 dmi_check_system(dsdt_dmi_table);
881 status = acpi_reallocate_root_table();
882 if (ACPI_FAILURE(status)) {
883 printk(KERN_ERR PREFIX
884 "Unable to reallocate ACPI tables\n");
888 status = acpi_initialize_subsystem();
889 if (ACPI_FAILURE(status)) {
890 printk(KERN_ERR PREFIX
891 "Unable to initialize the ACPI Interpreter\n");
895 status = acpi_load_tables();
896 if (ACPI_FAILURE(status)) {
897 printk(KERN_ERR PREFIX
898 "Unable to load the System Description Tables\n");
904 /* compatible (0) means level (3) */
905 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
906 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
907 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
909 /* Set PIC-mode SCI trigger type */
910 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
911 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
914 * now that acpi_gbl_FADT is initialized,
915 * update it with result from INT_SRC_OVR parsing
917 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
927 * acpi_subsystem_init - Finalize the early initialization of ACPI.
929 * Switch over the platform to the ACPI mode (if possible), initialize the
930 * handling of ACPI events, install the interrupt and global lock handlers.
932 * Doing this too early is generally unsafe, but at the same time it needs to be
933 * done before all things that really depend on ACPI. The right spot appears to
934 * be before finalizing the EFI initialization.
936 void __init acpi_subsystem_init(void)
943 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
944 if (ACPI_FAILURE(status)) {
945 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
949 * If the system is using ACPI then we can be reasonably
950 * confident that any regulators are managed by the firmware
951 * so tell the regulator core it has everything it needs to
954 regulator_has_full_constraints();
958 static int __init acpi_bus_init(void)
963 acpi_os_initialize1();
965 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
966 if (ACPI_FAILURE(status)) {
967 printk(KERN_ERR PREFIX
968 "Unable to start the ACPI Interpreter\n");
973 * ACPI 2.0 requires the EC driver to be loaded and work before
974 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
977 * This is accomplished by looking for the ECDT table, and getting
978 * the EC parameters out of that.
980 status = acpi_ec_ecdt_probe();
981 /* Ignore result. Not having an ECDT is not fatal. */
983 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
984 if (ACPI_FAILURE(status)) {
985 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
990 * _OSC method may exist in module level code,
991 * so it must be run after ACPI_FULL_INITIALIZATION
993 acpi_bus_osc_support();
996 * _PDC control method may load dynamic SSDT tables,
997 * and we need to install the table handler before that.
1001 acpi_early_processor_set_pdc();
1004 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
1005 * is necessary to enable it as early as possible.
1007 acpi_boot_ec_enable();
1009 printk(KERN_INFO PREFIX "Interpreter enabled\n");
1011 /* Initialize sleep structures */
1015 * Get the system interrupt model and evaluate \_PIC.
1017 result = acpi_bus_init_irq();
1022 * Register the for all standard device notifications.
1025 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
1026 &acpi_bus_notify, NULL);
1027 if (ACPI_FAILURE(status)) {
1028 printk(KERN_ERR PREFIX
1029 "Unable to register for device notifications\n");
1034 * Create the top ACPI proc directory
1036 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1038 result = bus_register(&acpi_bus_type);
1042 /* Mimic structured exception handling */
1048 struct kobject *acpi_kobj;
1049 EXPORT_SYMBOL_GPL(acpi_kobj);
1051 static int __init acpi_init(void)
1055 if (acpi_disabled) {
1056 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1060 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1062 printk(KERN_WARNING "%s: kset create error\n", __func__);
1066 init_acpi_device_notify();
1067 result = acpi_bus_init();
1073 pci_mmcfg_late_init();
1076 acpi_debugfs_init();
1077 acpi_sleep_proc_init();
1078 acpi_wakeup_device_init();
1082 subsys_initcall(acpi_init);