| /* |
| * 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/pm_legacy.h> |
| #include <linux/device.h> |
| #include <linux/proc_fs.h> |
| #ifdef CONFIG_X86 |
| #include <asm/mpspec.h> |
| #endif |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| |
| #define _COMPONENT ACPI_BUS_COMPONENT |
| ACPI_MODULE_NAME("bus"); |
| #ifdef CONFIG_X86 |
| extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); |
| #endif |
| |
| struct acpi_device *acpi_root; |
| struct proc_dir_entry *acpi_root_dir; |
| EXPORT_SYMBOL(acpi_root_dir); |
| |
| #define STRUCT_TO_INT(s) (*((int*)&s)) |
| |
| /* -------------------------------------------------------------------------- |
| 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); |
| |
| int acpi_bus_get_status(struct acpi_device *device) |
| { |
| acpi_status status = AE_OK; |
| unsigned long sta = 0; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| /* |
| * Evaluate _STA if present. |
| */ |
| if (device->flags.dynamic_status) { |
| status = |
| acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| STRUCT_TO_INT(device->status) = (int)sta; |
| } |
| |
| /* |
| * Otherwise we assume the status of our parent (unless we don't |
| * have one, in which case status is implied). |
| */ |
| else if (device->parent) |
| device->status = device->parent->status; |
| else |
| STRUCT_TO_INT(device->status) = 0x0F; |
| |
| if (device->status.functional && !device->status.present) { |
| printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " |
| "functional but not present; setting present\n", |
| device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); |
| device->status.present = 1; |
| } |
| |
| 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); |
| |
| /* -------------------------------------------------------------------------- |
| Power Management |
| -------------------------------------------------------------------------- */ |
| |
| int acpi_bus_get_power(acpi_handle handle, int *state) |
| { |
| int result = 0; |
| acpi_status status = 0; |
| struct acpi_device *device = NULL; |
| unsigned long psc = 0; |
| |
| |
| result = acpi_bus_get_device(handle, &device); |
| if (result) |
| return result; |
| |
| *state = ACPI_STATE_UNKNOWN; |
| |
| if (!device->flags.power_manageable) { |
| /* TBD: Non-recursive algorithm for walking up hierarchy */ |
| if (device->parent) |
| *state = device->parent->power.state; |
| else |
| *state = ACPI_STATE_D0; |
| } else { |
| /* |
| * Get the device's power state either directly (via _PSC) or |
| * indirectly (via power resources). |
| */ |
| if (device->power.flags.explicit_get) { |
| status = acpi_evaluate_integer(device->handle, "_PSC", |
| NULL, &psc); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| device->power.state = (int)psc; |
| } else if (device->power.flags.power_resources) { |
| result = acpi_power_get_inferred_state(device); |
| if (result) |
| return result; |
| } |
| |
| *state = device->power.state; |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", |
| device->pnp.bus_id, device->power.state)); |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(acpi_bus_get_power); |
| |
| int acpi_bus_set_power(acpi_handle handle, int state) |
| { |
| int result = 0; |
| acpi_status status = AE_OK; |
| struct acpi_device *device = NULL; |
| char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
| |
| |
| result = acpi_bus_get_device(handle, &device); |
| if (result) |
| return result; |
| |
| if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
| return -EINVAL; |
| |
| /* Make sure this is a valid target state */ |
| |
| if (!device->flags.power_manageable) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
| device->dev.kobj.name)); |
| return -ENODEV; |
| } |
| /* |
| * Get device's current power state if it's unknown |
| * This means device power state isn't initialized or previous setting failed |
| */ |
| if (!device->flags.force_power_state) { |
| if (device->power.state == ACPI_STATE_UNKNOWN) |
| acpi_bus_get_power(device->handle, &device->power.state); |
| if (state == device->power.state) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
| state)); |
| return 0; |
| } |
| } |
| if (!device->power.states[state].flags.valid) { |
| printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
| return -ENODEV; |
| } |
| if (device->parent && (state < device->parent->power.state)) { |
| printk(KERN_WARNING PREFIX |
| "Cannot set device to a higher-powered" |
| " state than parent\n"); |
| return -ENODEV; |
| } |
| |
| /* |
| * Transition Power |
| * ---------------- |
| * On transitions to a high-powered state we first apply power (via |
| * power resources) then evalute _PSx. Conversly for transitions to |
| * a lower-powered state. |
| */ |
| if (state < device->power.state) { |
| if (device->power.flags.power_resources) { |
| result = acpi_power_transition(device, state); |
| if (result) |
| goto end; |
| } |
| if (device->power.states[state].flags.explicit_set) { |
| status = acpi_evaluate_object(device->handle, |
| object_name, NULL, NULL); |
| if (ACPI_FAILURE(status)) { |
| result = -ENODEV; |
| goto end; |
| } |
| } |
| } else { |
| if (device->power.states[state].flags.explicit_set) { |
| status = acpi_evaluate_object(device->handle, |
| object_name, NULL, NULL); |
| if (ACPI_FAILURE(status)) { |
| result = -ENODEV; |
| goto end; |
| } |
| } |
| if (device->power.flags.power_resources) { |
| result = acpi_power_transition(device, state); |
| if (result) |
| goto end; |
| } |
| } |
| |
| end: |
| if (result) |
| printk(KERN_WARNING PREFIX |
| "Transitioning device [%s] to D%d\n", |
| device->pnp.bus_id, state); |
| else |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Device [%s] transitioned to D%d\n", |
| device->pnp.bus_id, state)); |
| |
| return result; |
| } |
| |
| EXPORT_SYMBOL(acpi_bus_set_power); |
| |
| /* -------------------------------------------------------------------------- |
| Event Management |
| -------------------------------------------------------------------------- */ |
| |
| 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_event(struct acpi_device *device, u8 type, int data) |
| { |
| struct acpi_bus_event *event = NULL; |
| unsigned long flags = 0; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| /* drop event on the floor if no one's listening */ |
| if (!event_is_open) |
| return 0; |
| |
| event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
| if (!event) |
| return -ENOMEM; |
| |
| strcpy(event->device_class, device->pnp.device_class); |
| strcpy(event->bus_id, device->pnp.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(acpi_bus_generate_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); |
| entry = |
| list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); |
| if (entry) |
| 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; |
| } |
| |
| EXPORT_SYMBOL(acpi_bus_receive_event); |
| |
| /* -------------------------------------------------------------------------- |
| Notification Handling |
| -------------------------------------------------------------------------- */ |
| |
| static int |
| acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
| { |
| acpi_status status = 0; |
| struct acpi_device_status old_status; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| if (status_changed) |
| *status_changed = 0; |
| |
| 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; |
| if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { |
| if (status_changed) |
| *status_changed = 1; |
| } |
| return 0; |
| } |
| |
| status = acpi_bus_get_status(device); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| |
| if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) |
| return 0; |
| |
| if (status_changed) |
| *status_changed = 1; |
| |
| /* |
| * 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 */ |
| } |
| |
| return 0; |
| } |
| |
| static int acpi_bus_check_scope(struct acpi_device *device) |
| { |
| int result = 0; |
| int status_changed = 0; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| /* Status Change? */ |
| result = acpi_bus_check_device(device, &status_changed); |
| if (result) |
| return result; |
| |
| if (!status_changed) |
| return 0; |
| |
| /* |
| * TBD: Enumerate child devices within this device's scope and |
| * run acpi_bus_check_device()'s on them. |
| */ |
| |
| return 0; |
| } |
| |
| /** |
| * 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) |
| { |
| int result = 0; |
| struct acpi_device *device = NULL; |
| |
| |
| if (acpi_bus_get_device(handle, &device)) |
| return; |
| |
| switch (type) { |
| |
| case ACPI_NOTIFY_BUS_CHECK: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received BUS CHECK notification for device [%s]\n", |
| device->pnp.bus_id)); |
| result = acpi_bus_check_scope(device); |
| /* |
| * 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_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received DEVICE CHECK notification for device [%s]\n", |
| device->pnp.bus_id)); |
| result = acpi_bus_check_device(device, NULL); |
| /* |
| * TBD: We'll need to outsource certain events to non-ACPI |
| * drivers via the device manager (device.c). |
| */ |
| break; |
| |
| case ACPI_NOTIFY_DEVICE_WAKE: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received DEVICE WAKE notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_EJECT_REQUEST: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received EJECT REQUEST notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received DEVICE CHECK LIGHT notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD: Exactly what does 'light' mean? */ |
| break; |
| |
| case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received FREQUENCY MISMATCH notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received BUS MODE MISMATCH notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD */ |
| break; |
| |
| case ACPI_NOTIFY_POWER_FAULT: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received POWER FAULT notification for device [%s]\n", |
| device->pnp.bus_id)); |
| /* TBD */ |
| break; |
| |
| default: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Received unknown/unsupported notification [%08x]\n", |
| type)); |
| break; |
| } |
| |
| return; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| 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; |
| } |
| |
| acpi_native_uint 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; |
| |
| 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) { |
| extern u8 acpi_sci_flags; |
| |
| /* 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 { |
| extern int acpi_sci_override_gsi; |
| /* |
| * 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_HARDWARE_INIT | |
| ACPI_NO_ACPI_ENABLE)); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); |
| goto error0; |
| } |
| |
| 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); |
| |
| |
| status = acpi_os_initialize1(); |
| |
| status = |
| acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to start the ACPI Interpreter\n"); |
| goto error1; |
| } |
| |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX |
| "Unable to initialize ACPI OS objects\n"); |
| goto error1; |
| } |
| #ifdef CONFIG_ACPI_EC |
| /* |
| * 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. */ |
| #endif |
| |
| status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
| if (ACPI_FAILURE(status)) { |
| printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |
| goto error1; |
| } |
| |
| printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
| |
| /* |
| * 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; |
| } |
| |
| decl_subsys(acpi, NULL, NULL); |
| |
| static int __init acpi_init(void) |
| { |
| int result = 0; |
| |
| |
| if (acpi_disabled) { |
| printk(KERN_INFO PREFIX "Interpreter disabled.\n"); |
| return -ENODEV; |
| } |
| |
| result = firmware_register(&acpi_subsys); |
| if (result < 0) |
| printk(KERN_WARNING "%s: firmware_register error: %d\n", |
| __FUNCTION__, result); |
| |
| result = acpi_bus_init(); |
| |
| if (!result) { |
| #ifdef CONFIG_PM_LEGACY |
| if (!PM_IS_ACTIVE()) |
| pm_active = 1; |
| else { |
| printk(KERN_INFO PREFIX |
| "APM is already active, exiting\n"); |
| disable_acpi(); |
| result = -ENODEV; |
| } |
| #endif |
| } else |
| disable_acpi(); |
| |
| return result; |
| } |
| |
| subsys_initcall(acpi_init); |