| /* |
| * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) |
| * |
| * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/ioport.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/sched.h> |
| #include <linux/pm.h> |
| #include <linux/device.h> |
| #include <linux/proc_fs.h> |
| #include <linux/acpi.h> |
| #include <linux/slab.h> |
| #include <linux/regulator/machine.h> |
| #ifdef CONFIG_X86 |
| #include <asm/mpspec.h> |
| #endif |
| #include <linux/pci.h> |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| #include <acpi/apei.h> |
| #include <linux/dmi.h> |
| #include <linux/suspend.h> |
| |
| #include "internal.h" |
| |
| #define _COMPONENT ACPI_BUS_COMPONENT |
| ACPI_MODULE_NAME("bus"); |
| |
| struct acpi_device *acpi_root; |
| struct proc_dir_entry *acpi_root_dir; |
| EXPORT_SYMBOL(acpi_root_dir); |
| |
| #define STRUCT_TO_INT(s) (*((int*)&s)) |
| |
| |
| #ifdef CONFIG_X86 |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| static inline int set_copy_dsdt(const struct dmi_system_id *id) |
| { |
| return 0; |
| } |
| #else |
| static int set_copy_dsdt(const struct dmi_system_id *id) |
| { |
| printk(KERN_NOTICE "%s detected - " |
| "force copy of DSDT to local memory\n", id->ident); |
| acpi_gbl_copy_dsdt_locally = 1; |
| return 0; |
| } |
| #endif |
| |
| static struct dmi_system_id dsdt_dmi_table[] __initdata = { |
| /* |
| * Invoke DSDT corruption work-around on all Toshiba Satellite. |
| * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
| */ |
| { |
| .callback = set_copy_dsdt, |
| .ident = "TOSHIBA Satellite", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
| }, |
| }, |
| {} |
| }; |
| #else |
| static struct dmi_system_id dsdt_dmi_table[] __initdata = { |
| {} |
| }; |
| #endif |
| |
| /* -------------------------------------------------------------------------- |
| Device Management |
| -------------------------------------------------------------------------- */ |
| |
| int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
| { |
| acpi_status status = AE_OK; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| /* TBD: Support fixed-feature devices */ |
| |
| status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
| if (ACPI_FAILURE(status) || !*device) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| handle)); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(acpi_bus_get_device); |
| |
| acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
| unsigned long long *sta) |
| { |
| acpi_status status; |
| |
| status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
| if (ACPI_SUCCESS(status)) |
| return AE_OK; |
| |
| if (status == AE_NOT_FOUND) { |
| *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | |
| ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; |
| return AE_OK; |
| } |
| return status; |
| } |
| |
| int acpi_bus_get_status(struct acpi_device *device) |
| { |
| acpi_status status; |
| unsigned long long sta; |
| |
| status = acpi_bus_get_status_handle(device->handle, &sta); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| |
| STRUCT_TO_INT(device->status) = (int) sta; |
| |
| if (device->status.functional && !device->status.present) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
| "functional but not present;\n", |
| device->pnp.bus_id, |
| (u32) STRUCT_TO_INT(device->status))); |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
| device->pnp.bus_id, |
| (u32) STRUCT_TO_INT(device->status))); |
| return 0; |
| } |
| EXPORT_SYMBOL(acpi_bus_get_status); |
| |
| void acpi_bus_private_data_handler(acpi_handle handle, |
| void *context) |
| { |
| return; |
| } |
| EXPORT_SYMBOL(acpi_bus_private_data_handler); |
| |
| int acpi_bus_get_private_data(acpi_handle handle, void **data) |
| { |
| acpi_status status = AE_OK; |
| |
| if (!*data) |
| return -EINVAL; |
| |
| status = acpi_get_data(handle, acpi_bus_private_data_handler, data); |
| if (ACPI_FAILURE(status) || !*data) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| handle)); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(acpi_bus_get_private_data); |
| |
| static void acpi_print_osc_error(acpi_handle handle, |
| struct acpi_osc_context *context, char *error) |
| { |
| struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; |
| int i; |
| |
| if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) |
| printk(KERN_DEBUG "%s\n", error); |
| else { |
| printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); |
| kfree(buffer.pointer); |
| } |
| printk(KERN_DEBUG"_OSC request data:"); |
| for (i = 0; i < context->cap.length; i += sizeof(u32)) |
| printk("%x ", *((u32 *)(context->cap.pointer + i))); |
| printk("\n"); |
| } |
| |
| static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
| { |
| int i; |
| static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, |
| 24, 26, 28, 30, 32, 34}; |
| |
| if (strlen(str) != 36) |
| return AE_BAD_PARAMETER; |
| for (i = 0; i < 36; i++) { |
| if (i == 8 || i == 13 || i == 18 || i == 23) { |
| if (str[i] != '-') |
| return AE_BAD_PARAMETER; |
| } else if (!isxdigit(str[i])) |
| return AE_BAD_PARAMETER; |
| } |
| for (i = 0; i < 16; i++) { |
| uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
| uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); |
| } |
| return AE_OK; |
| } |
| |
| acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) |
| { |
| acpi_status status; |
| struct acpi_object_list input; |
| union acpi_object in_params[4]; |
| union acpi_object *out_obj; |
| u8 uuid[16]; |
| u32 errors; |
| struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
| |
| if (!context) |
| return AE_ERROR; |
| if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) |
| return AE_ERROR; |
| context->ret.length = ACPI_ALLOCATE_BUFFER; |
| context->ret.pointer = NULL; |
| |
| /* Setting up input parameters */ |
| input.count = 4; |
| input.pointer = in_params; |
| in_params[0].type = ACPI_TYPE_BUFFER; |
| in_params[0].buffer.length = 16; |
| in_params[0].buffer.pointer = uuid; |
| in_params[1].type = ACPI_TYPE_INTEGER; |
| in_params[1].integer.value = context->rev; |
| in_params[2].type = ACPI_TYPE_INTEGER; |
| in_params[2].integer.value = context->cap.length/sizeof(u32); |
| in_params[3].type = ACPI_TYPE_BUFFER; |
| in_params[3].buffer.length = context->cap.length; |
| in_params[3].buffer.pointer = context->cap.pointer; |
| |
| status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
| if (ACPI_FAILURE(status)) |
| return status; |
| |
| if (!output.length) |
| return AE_NULL_OBJECT; |
| |
| out_obj = output.pointer; |
| if (out_obj->type != ACPI_TYPE_BUFFER |
| || out_obj->buffer.length != context->cap.length) { |
| acpi_print_osc_error(handle, context, |
| "_OSC evaluation returned wrong type"); |
| status = AE_TYPE; |
| goto out_kfree; |
| } |
| /* Need to ignore the bit0 in result code */ |
| errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); |
| if (errors) { |
| if (errors & OSC_REQUEST_ERROR) |
| acpi_print_osc_error(handle, context, |
| "_OSC request failed"); |
| if (errors & OSC_INVALID_UUID_ERROR) |
| acpi_print_osc_error(handle, context, |
| "_OSC invalid UUID"); |
| if (errors & OSC_INVALID_REVISION_ERROR) |
| acpi_print_osc_error(handle, context, |
| "_OSC invalid revision"); |
| if (errors & OSC_CAPABILITIES_MASK_ERROR) { |
| if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] |
| & OSC_QUERY_ENABLE) |
| goto out_success; |
| status = AE_SUPPORT; |
| goto out_kfree; |
| } |
| status = AE_ERROR; |
| goto out_kfree; |
| } |
| out_success: |
| context->ret.length = out_obj->buffer.length; |
| context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
| context->ret.length, GFP_KERNEL); |
| if (!context->ret.pointer) { |
| status = AE_NO_MEMORY; |
| goto out_kfree; |
| } |
| status = AE_OK; |
| |
| out_kfree: |
| kfree(output.pointer); |
| if (status != AE_OK) |
| context->ret.pointer = NULL; |
| return status; |
| } |
| EXPORT_SYMBOL(acpi_run_osc); |
| |
| bool osc_sb_apei_support_acked; |
| static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
| static void acpi_bus_osc_support(void) |
| { |
| u32 capbuf[2]; |
| struct acpi_osc_context context = { |
| .uuid_str = sb_uuid_str, |
| .rev = 1, |
| .cap.length = 8, |
| .cap.pointer = capbuf, |
| }; |
| acpi_handle handle; |
| |
| capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
| capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ |
| #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
| defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) |
| capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
| #endif |
| |
| #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) |
| capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; |
| #endif |
| |
| #ifdef ACPI_HOTPLUG_OST |
| capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
| #endif |
| |
| if (!ghes_disable) |
| capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT; |
| if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
| return; |
| if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
| u32 *capbuf_ret = context.ret.pointer; |
| if (context.ret.length > OSC_SUPPORT_TYPE) |
| osc_sb_apei_support_acked = |
| capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT; |
| kfree(context.ret.pointer); |
| } |
| /* do we need to check other returned cap? Sounds no */ |
| } |
| |
| /* -------------------------------------------------------------------------- |
| Event Management |
| -------------------------------------------------------------------------- */ |
| |
| #ifdef CONFIG_ACPI_PROC_EVENT |
| static DEFINE_SPINLOCK(acpi_bus_event_lock); |
| |
| LIST_HEAD(acpi_bus_event_list); |
| DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); |
| |
| extern int event_is_open; |
| |
| int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
| { |
| struct acpi_bus_event *event; |
| unsigned long flags = 0; |
| |
| /* drop event on the floor if no one's listening */ |
| if (!event_is_open) |
| return 0; |
| |
| event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| if (!event) |
| return -ENOMEM; |
| |
| strcpy(event->device_class, device_class); |
| strcpy(event->bus_id, bus_id); |
| event->type = type; |
| event->data = data; |
| |
| spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| list_add_tail(&event->node, &acpi_bus_event_list); |
| spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| |
| wake_up_interruptible(&acpi_bus_event_queue); |
| |
| return 0; |
| |
| } |
| |
| EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); |
| |
| int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) |
| { |
| if (!device) |
| return -EINVAL; |
| return acpi_bus_generate_proc_event4(device->pnp.device_class, |
| device->pnp.bus_id, type, data); |
| } |
| |
| EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
| |
| int acpi_bus_receive_event(struct acpi_bus_event *event) |
| { |
| unsigned long flags = 0; |
| struct acpi_bus_event *entry = NULL; |
| |
| DECLARE_WAITQUEUE(wait, current); |
| |
| |
| if (!event) |
| return -EINVAL; |
| |
| if (list_empty(&acpi_bus_event_list)) { |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&acpi_bus_event_queue, &wait); |
| |
| if (list_empty(&acpi_bus_event_list)) |
| schedule(); |
| |
| remove_wait_queue(&acpi_bus_event_queue, &wait); |
| set_current_state(TASK_RUNNING); |
| |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| } |
| |
| spin_lock_irqsave(&acpi_bus_event_lock, flags); |
| if (!list_empty(&acpi_bus_event_list)) { |
| entry = list_entry(acpi_bus_event_list.next, |
| struct acpi_bus_event, node); |
| list_del(&entry->node); |
| } |
| spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
| |
| if (!entry) |
| return -ENODEV; |
| |
| memcpy(event, entry, sizeof(struct acpi_bus_event)); |
| |
| kfree(entry); |
| |
| return 0; |
| } |
| |
| #endif /* CONFIG_ACPI_PROC_EVENT */ |
| |
| /* -------------------------------------------------------------------------- |
| Notification Handling |
| -------------------------------------------------------------------------- */ |
| |
| static void acpi_bus_check_device(acpi_handle handle) |
| { |
| struct acpi_device *device; |
| acpi_status status; |
| struct acpi_device_status old_status; |
| |
| if (acpi_bus_get_device(handle, &device)) |
| return; |
| if (!device) |
| return; |
| |
| old_status = device->status; |
| |
| /* |
| * Make sure this device's parent is present before we go about |
| * messing with the device. |
| */ |
| if (device->parent && !device->parent->status.present) { |
| device->status = device->parent->status; |
| return; |
| } |
| |
| status = acpi_bus_get_status(device); |
| if (ACPI_FAILURE(status)) |
| return; |
| |
| if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
| return; |
| |
| /* |
| * Device Insertion/Removal |
| */ |
| if ((device->status.present) && !(old_status.present)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); |
| /* TBD: Handle device insertion */ |
| } else if (!(device->status.present) && (old_status.present)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
| /* TBD: Handle device removal */ |
| } |
| } |
| |
| static void acpi_bus_check_scope(acpi_handle handle) |
| { |
| /* Status Change? */ |
| acpi_bus_check_device(handle); |
| |
| /* |
| * TBD: Enumerate child devices within this device's scope and |
| * run acpi_bus_check_device()'s on them. |
| */ |
| } |
| |
| static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
| int register_acpi_bus_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); |
| } |
| EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); |
| |
| void unregister_acpi_bus_notifier(struct notifier_block *nb) |
| { |
| blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); |
| } |
| EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); |
| |
| /** |
| * acpi_bus_notify |
| * --------------- |
| * Callback for all 'system-level' device notifications (values 0x00-0x7F). |
| */ |
| static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
| { |
| struct acpi_device *device = NULL; |
| struct acpi_driver *driver; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
| type, handle)); |
| |
| blocking_notifier_call_chain(&acpi_bus_notify_list, |
| type, (void *)handle); |
| |
| switch (type) { |
| |
| case ACPI_NOTIFY_BUS_CHECK: |
| acpi_bus_check_scope(handle); |
| /* |
| * TBD: We'll need to outsource certain events to non-ACPI |
| * drivers via the device manager (device.c). |
| */ |
| break; |
| |
| case ACPI_NOTIFY_DEVICE_CHECK: |
| acpi_bus_check_device(handle); |
| /* |
| * TBD: We'll need to outsource certain events to non-ACPI |
| * drivers via the device manager (device.c). |
| */ |
| break; |
| |
| case ACPI_NOTIFY_DEVICE_WAKE: |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_EJECT_REQUEST: |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
| /* TBD: Exactly what does 'light' mean? */ |
| break; |
| |
| case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_POWER_FAULT: |
| /* TBD */ |
| break; |
| |
| default: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received unknown/unsupported notification [%08x]\n", |
| type)); |
| break; |
| } |
| |
| acpi_bus_get_device(handle, &device); |
| if (device) { |
| driver = device->driver; |
| if (driver && driver->ops.notify && |
| (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) |
| driver->ops.notify(device, type); |
| } |
| } |
| |
| /* -------------------------------------------------------------------------- |
| Initialization/Cleanup |
| -------------------------------------------------------------------------- */ |
| |
| static int __init acpi_bus_init_irq(void) |
| { |
| acpi_status status = AE_OK; |
| union acpi_object arg = { ACPI_TYPE_INTEGER }; |
| struct acpi_object_list arg_list = { 1, &arg }; |
| char *message = NULL; |
| |
| |
| /* |
| * Let the system know what interrupt model we are using by |
| * evaluating the \_PIC object, if exists. |
| */ |
| |
| switch (acpi_irq_model) { |
| case ACPI_IRQ_MODEL_PIC: |
| message = "PIC"; |
| break; |
| case ACPI_IRQ_MODEL_IOAPIC: |
| message = "IOAPIC"; |
| break; |
| case ACPI_IRQ_MODEL_IOSAPIC: |
| message = "IOSAPIC"; |
| break; |
| case ACPI_IRQ_MODEL_PLATFORM: |
| message = "platform specific model"; |
| break; |
| default: |
| printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); |
| return -ENODEV; |
| } |
| |
| printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); |
| |
| arg.integer.value = acpi_irq_model; |
| |
| status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); |
| if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| u8 acpi_gbl_permanent_mmap; |
| |
| |
| void __init acpi_early_init(void) |
| { |
| acpi_status status = AE_OK; |
| |
| if (acpi_disabled) |
| return; |
| |
| printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
| |
| /* enable workarounds, unless strict ACPI spec. compliance */ |
| if (!acpi_strict) |
| acpi_gbl_enable_interpreter_slack = TRUE; |
| |
| acpi_gbl_permanent_mmap = 1; |
| |
| /* |
| * If the machine falls into the DMI check table, |
| * DSDT will be copied to memory |
| */ |
| dmi_check_system(dsdt_dmi_table); |
| |
| status = acpi_reallocate_root_table(); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to reallocate ACPI tables\n"); |
| goto error0; |
| } |
| |
| status = acpi_initialize_subsystem(); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to initialize the ACPI Interpreter\n"); |
| goto error0; |
| } |
| |
| status = acpi_load_tables(); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to load the System Description Tables\n"); |
| goto error0; |
| } |
| |
| #ifdef CONFIG_X86 |
| if (!acpi_ioapic) { |
| /* compatible (0) means level (3) */ |
| if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
| acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; |
| acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; |
| } |
| /* Set PIC-mode SCI trigger type */ |
| acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
| (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
| } else { |
| /* |
| * now that acpi_gbl_FADT is initialized, |
| * update it with result from INT_SRC_OVR parsing |
| */ |
| acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
| } |
| #endif |
| |
| status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| goto error0; |
| } |
| |
| /* |
| * If the system is using ACPI then we can be reasonably |
| * confident that any regulators are managed by the firmware |
| * so tell the regulator core it has everything it needs to |
| * know. |
| */ |
| regulator_has_full_constraints(); |
| |
| return; |
| |
| error0: |
| disable_acpi(); |
| return; |
| } |
| |
| static int __init acpi_bus_init(void) |
| { |
| int result = 0; |
| acpi_status status = AE_OK; |
| extern acpi_status acpi_os_initialize1(void); |
| |
| acpi_os_initialize1(); |
| |
| status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to start the ACPI Interpreter\n"); |
| goto error1; |
| } |
| |
| /* |
| * ACPI 2.0 requires the EC driver to be loaded and work before |
| * the EC device is found in the namespace (i.e. before acpi_initialize_objects() |
| * is called). |
| * |
| * This is accomplished by looking for the ECDT table, and getting |
| * the EC parameters out of that. |
| */ |
| status = acpi_ec_ecdt_probe(); |
| /* Ignore result. Not having an ECDT is not fatal. */ |
| |
| status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| goto error1; |
| } |
| |
| /* |
| * _OSC method may exist in module level code, |
| * so it must be run after ACPI_FULL_INITIALIZATION |
| */ |
| acpi_bus_osc_support(); |
| |
| /* |
| * _PDC control method may load dynamic SSDT tables, |
| * and we need to install the table handler before that. |
| */ |
| acpi_sysfs_init(); |
| |
| acpi_early_processor_set_pdc(); |
| |
| /* |
| * Maybe EC region is required at bus_scan/acpi_get_devices. So it |
| * is necessary to enable it as early as possible. |
| */ |
| acpi_boot_ec_enable(); |
| |
| printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| |
| /* Initialize sleep structures */ |
| acpi_sleep_init(); |
| |
| /* |
| * Get the system interrupt model and evaluate \_PIC. |
| */ |
| result = acpi_bus_init_irq(); |
| if (result) |
| goto error1; |
| |
| /* |
| * Register the for all standard device notifications. |
| */ |
| status = |
| acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, |
| &acpi_bus_notify, NULL); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to register for device notifications\n"); |
| goto error1; |
| } |
| |
| /* |
| * Create the top ACPI proc directory |
| */ |
| acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
| |
| return 0; |
| |
| /* Mimic structured exception handling */ |
| error1: |
| acpi_terminate(); |
| return -ENODEV; |
| } |
| |
| struct kobject *acpi_kobj; |
| EXPORT_SYMBOL_GPL(acpi_kobj); |
| |
| static int __init acpi_init(void) |
| { |
| int result; |
| |
| if (acpi_disabled) { |
| printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
| return -ENODEV; |
| } |
| |
| acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
| if (!acpi_kobj) { |
| printk(KERN_WARNING "%s: kset create error\n", __func__); |
| acpi_kobj = NULL; |
| } |
| |
| init_acpi_device_notify(); |
| result = acpi_bus_init(); |
| if (result) { |
| disable_acpi(); |
| return result; |
| } |
| |
| pci_mmcfg_late_init(); |
| acpi_scan_init(); |
| acpi_ec_init(); |
| acpi_debugfs_init(); |
| acpi_sleep_proc_init(); |
| acpi_wakeup_device_init(); |
| return 0; |
| } |
| |
| subsys_initcall(acpi_init); |