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c501d8112c
svn path=/branches/aicom-network-fixes/; revision=34994
605 lines
15 KiB
C
605 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_EVENTS
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MODULE_NAME ("evxface")
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/******************************************************************************
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*
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* FUNCTION: Acpi_install_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to enable.
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* Handler - Pointer to the handler function for the
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* event
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function and then enables the
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* event.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_install_fixed_event_handler (
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u32 event,
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FIXED_EVENT_HANDLER handler,
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void *context)
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{
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ACPI_STATUS status;
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/* Parameter validation */
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if (event >= NUM_FIXED_EVENTS) {
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_acquire_mutex (ACPI_MTX_EVENTS);
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/* Don't allow two handlers. */
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if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
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status = AE_EXIST;
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goto cleanup;
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}
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/* Install the handler before enabling the event - just in case... */
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acpi_gbl_fixed_event_handlers[event].handler = handler;
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acpi_gbl_fixed_event_handlers[event].context = context;
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status = acpi_enable_event (event, ACPI_EVENT_FIXED);
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if (!ACPI_SUCCESS (status)) {
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/* Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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}
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cleanup:
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acpi_cm_release_mutex (ACPI_MTX_EVENTS);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_remove_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to disable.
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disables the event and unregisters the event handler.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_remove_fixed_event_handler (
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u32 event,
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FIXED_EVENT_HANDLER handler)
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{
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ACPI_STATUS status = AE_OK;
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/* Parameter validation */
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if (event >= NUM_FIXED_EVENTS) {
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_acquire_mutex (ACPI_MTX_EVENTS);
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/* Disable the event before removing the handler - just in case... */
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status = acpi_disable_event(event, ACPI_EVENT_FIXED);
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/* Always Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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acpi_cm_release_mutex (ACPI_MTX_EVENTS);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_install_notify_handler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* Handler_type - The type of handler:
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* ACPI_SYSTEM_NOTIFY: System_handler (00-7f)
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* ACPI_DEVICE_NOTIFY: Driver_handler (80-ff)
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* Handler - Address of the handler
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for notifies on an ACPI device
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_install_notify_handler (
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ACPI_HANDLE device,
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u32 handler_type,
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NOTIFY_HANDLER handler,
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void *context)
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{
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_OPERAND_OBJECT *notify_obj;
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ACPI_NAMESPACE_NODE *device_node;
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ACPI_STATUS status = AE_OK;
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/* Parameter validation */
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if ((!handler) ||
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(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
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/* Convert and validate the device handle */
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device_node = acpi_ns_convert_handle_to_entry (device);
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if (!device_node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/*
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* Root Object:
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* ------------
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* Registering a notify handler on the root object indicates that the
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* caller wishes to receive notifications for all objects. Note that
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* only one <external> global handler can be regsitered (per notify type).
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*/
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if (device == ACPI_ROOT_OBJECT) {
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/* Make sure the handler is not already installed */
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if (((handler_type == ACPI_SYSTEM_NOTIFY) &&
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acpi_gbl_sys_notify.handler) ||
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((handler_type == ACPI_DEVICE_NOTIFY) &&
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acpi_gbl_drv_notify.handler)) {
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status = AE_EXIST;
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goto unlock_and_exit;
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}
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if (handler_type == ACPI_SYSTEM_NOTIFY) {
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acpi_gbl_sys_notify.node = device_node;
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acpi_gbl_sys_notify.handler = handler;
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acpi_gbl_sys_notify.context = context;
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}
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else /* ACPI_DEVICE_NOTIFY */ {
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acpi_gbl_drv_notify.node = device_node;
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acpi_gbl_drv_notify.handler = handler;
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acpi_gbl_drv_notify.context = context;
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}
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/* Global notify handler installed */
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}
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/*
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* Other Objects:
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* --------------
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* Caller will only receive notifications specific to the target object.
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* Note that only certain object types can receive notifications.
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*/
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else {
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/*
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* These are the ONLY objects that can receive ACPI notifications
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*/
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if ((device_node->type != ACPI_TYPE_DEVICE) &&
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(device_node->type != ACPI_TYPE_PROCESSOR) &&
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(device_node->type != ACPI_TYPE_POWER) &&
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(device_node->type != ACPI_TYPE_THERMAL)) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object ((ACPI_HANDLE) device_node);
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if (obj_desc) {
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/* Object exists - make sure there's no handler */
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if (((handler_type == ACPI_SYSTEM_NOTIFY) &&
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obj_desc->device.sys_handler) ||
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((handler_type == ACPI_DEVICE_NOTIFY) &&
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obj_desc->device.drv_handler)) {
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status = AE_EXIST;
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goto unlock_and_exit;
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}
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}
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else {
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/* Create a new object */
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obj_desc = acpi_cm_create_internal_object (device_node->type);
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if (!obj_desc) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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/* Attach new object to the Node */
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status = acpi_ns_attach_object (device, obj_desc, (u8) device_node->type);
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if (ACPI_FAILURE (status)) {
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goto unlock_and_exit;
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}
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}
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/* Install the handler */
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notify_obj = acpi_cm_create_internal_object (INTERNAL_TYPE_NOTIFY);
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if (!notify_obj) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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notify_obj->notify_handler.node = device_node;
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notify_obj->notify_handler.handler = handler;
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notify_obj->notify_handler.context = context;
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if (handler_type == ACPI_SYSTEM_NOTIFY) {
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obj_desc->device.sys_handler = notify_obj;
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}
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else /* ACPI_DEVICE_NOTIFY */ {
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obj_desc->device.drv_handler = notify_obj;
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}
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}
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unlock_and_exit:
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acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
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return (status);
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}
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/*****************************************************************************
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*
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* FUNCTION: Acpi_remove_notify_handler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* Handler_type - The type of handler:
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* ACPI_SYSTEM_NOTIFY: System_handler (00-7f)
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* ACPI_DEVICE_NOTIFY: Driver_handler (80-ff)
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* Handler - Address of the handler
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* RETURN: Status
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*
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* DESCRIPTION: Remove a handler for notifies on an ACPI device
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_remove_notify_handler (
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ACPI_HANDLE device,
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u32 handler_type,
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NOTIFY_HANDLER handler)
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{
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ACPI_OPERAND_OBJECT *notify_obj;
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ACPI_OPERAND_OBJECT *obj_desc;
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ACPI_NAMESPACE_NODE *device_node;
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ACPI_STATUS status = AE_OK;
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/* Parameter validation */
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if ((!handler) ||
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(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
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/* Convert and validate the device handle */
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device_node = acpi_ns_convert_handle_to_entry (device);
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if (!device_node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/*
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* Root Object:
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* ------------
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*/
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if (device == ACPI_ROOT_OBJECT) {
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if (((handler_type == ACPI_SYSTEM_NOTIFY) &&
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!acpi_gbl_sys_notify.handler) ||
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((handler_type == ACPI_DEVICE_NOTIFY) &&
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!acpi_gbl_drv_notify.handler)) {
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status = AE_NOT_EXIST;
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goto unlock_and_exit;
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}
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if (handler_type == ACPI_SYSTEM_NOTIFY) {
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acpi_gbl_sys_notify.node = NULL;
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acpi_gbl_sys_notify.handler = NULL;
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acpi_gbl_sys_notify.context = NULL;
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}
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else {
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acpi_gbl_drv_notify.node = NULL;
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acpi_gbl_drv_notify.handler = NULL;
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acpi_gbl_drv_notify.context = NULL;
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}
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}
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/*
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* Other Objects:
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* --------------
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*/
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else {
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/*
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* These are the ONLY objects that can receive ACPI notifications
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*/
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if ((device_node->type != ACPI_TYPE_DEVICE) &&
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(device_node->type != ACPI_TYPE_PROCESSOR) &&
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(device_node->type != ACPI_TYPE_POWER) &&
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(device_node->type != ACPI_TYPE_THERMAL)) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object ((ACPI_HANDLE) device_node);
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if (!obj_desc) {
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status = AE_NOT_EXIST;
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goto unlock_and_exit;
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}
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/* Object exists - make sure there's an existing handler */
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if (handler_type == ACPI_SYSTEM_NOTIFY) {
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notify_obj = obj_desc->device.sys_handler;
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}
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else {
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notify_obj = obj_desc->device.drv_handler;
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}
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if ((!notify_obj) ||
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(notify_obj->notify_handler.handler != handler)) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Remove the handler */
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if (handler_type == ACPI_SYSTEM_NOTIFY) {
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obj_desc->device.sys_handler = NULL;
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}
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else {
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obj_desc->device.drv_handler = NULL;
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}
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acpi_cm_remove_reference (notify_obj);
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}
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unlock_and_exit:
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acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_install_gpe_handler
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*
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* PARAMETERS: Gpe_number - The GPE number. The numbering scheme is
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* bank 0 first, then bank 1.
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* Type - Whether this GPE should be treated as an
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* edge- or level-triggered interrupt.
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* Handler - Address of the handler
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for a General Purpose Event.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_install_gpe_handler (
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u32 gpe_number,
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u32 type,
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GPE_HANDLER handler,
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void *context)
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{
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ACPI_STATUS status = AE_OK;
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/* Parameter validation */
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if (!handler || (gpe_number > NUM_GPE)) {
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return (AE_BAD_PARAMETER);
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}
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/* Ensure that we have a valid GPE number */
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if (acpi_gbl_gpe_valid[gpe_number] == ACPI_GPE_INVALID) {
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return (AE_BAD_PARAMETER);
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}
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acpi_cm_acquire_mutex (ACPI_MTX_EVENTS);
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/* Make sure that there isn't a handler there already */
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if (acpi_gbl_gpe_info[gpe_number].handler) {
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status = AE_EXIST;
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goto cleanup;
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}
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/* Install the handler */
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acpi_gbl_gpe_info[gpe_number].handler = handler;
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acpi_gbl_gpe_info[gpe_number].context = context;
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acpi_gbl_gpe_info[gpe_number].type = (u8) type;
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/* Clear the GPE (of stale events), the enable it */
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acpi_hw_clear_gpe (gpe_number);
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acpi_hw_enable_gpe (gpe_number);
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cleanup:
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acpi_cm_release_mutex (ACPI_MTX_EVENTS);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_remove_gpe_handler
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*
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* PARAMETERS: Gpe_number - The event to remove a handler
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a handler for a General Purpose Acpi_event.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_remove_gpe_handler (
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u32 gpe_number,
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GPE_HANDLER handler)
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{
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ACPI_STATUS status = AE_OK;
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/* Parameter validation */
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if (!handler || (gpe_number > NUM_GPE)) {
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return (AE_BAD_PARAMETER);
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}
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/* Ensure that we have a valid GPE number */
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if (acpi_gbl_gpe_valid[gpe_number] == ACPI_GPE_INVALID) {
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return (AE_BAD_PARAMETER);
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}
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/* Disable the GPE before removing the handler */
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acpi_hw_disable_gpe (gpe_number);
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acpi_cm_acquire_mutex (ACPI_MTX_EVENTS);
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/* Make sure that the installed handler is the same */
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if (acpi_gbl_gpe_info[gpe_number].handler != handler) {
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acpi_hw_enable_gpe (gpe_number);
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status = AE_BAD_PARAMETER;
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goto cleanup;
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}
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/* Remove the handler */
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acpi_gbl_gpe_info[gpe_number].handler = NULL;
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acpi_gbl_gpe_info[gpe_number].context = NULL;
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cleanup:
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acpi_cm_release_mutex (ACPI_MTX_EVENTS);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_acquire_global_lock
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*
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* PARAMETERS: Timeout - How long the caller is willing to wait
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* Out_handle - A handle to the lock if acquired
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*
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* RETURN: Status
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*
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* DESCRIPTION: Acquire the ACPI Global Lock
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_acquire_global_lock (
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void)
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{
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ACPI_STATUS status;
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status = acpi_aml_enter_interpreter ();
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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/*
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* TBD: [Restructure] add timeout param to internal interface, and
|
|
* perhaps INTERPRETER_LOCKED
|
|
*/
|
|
|
|
status = acpi_ev_acquire_global_lock ();
|
|
acpi_aml_exit_interpreter ();
|
|
|
|
return (status);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_release_global_lock
|
|
*
|
|
* PARAMETERS: Handle - Returned from Acpi_acquire_global_lock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Release the ACPI Global Lock
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
acpi_release_global_lock (
|
|
void)
|
|
{
|
|
acpi_ev_release_global_lock ();
|
|
return (AE_OK);
|
|
}
|
|
|
|
|