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https://github.com/reactos/reactos.git
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481 lines
9.4 KiB
C
481 lines
9.4 KiB
C
/******************************************************************************
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*
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* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
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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 ("evxfevnt")
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/**************************************************************************
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*
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* FUNCTION: Acpi_enable
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Transfers the system into ACPI mode.
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*
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*************************************************************************/
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ACPI_STATUS
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acpi_enable (void)
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{
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ACPI_STATUS status;
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/* Make sure we've got ACPI tables */
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if (!acpi_gbl_DSDT) {
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return (AE_NO_ACPI_TABLES);
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}
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/* Make sure the BIOS supports ACPI mode */
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if (SYS_MODE_LEGACY == acpi_hw_get_mode_capabilities()) {
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return (AE_ERROR);
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}
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/* Transition to ACPI mode */
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status = acpi_hw_set_mode (SYS_MODE_ACPI);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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return (status);
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}
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/**************************************************************************
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*
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* FUNCTION: Acpi_disable
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns the system to original ACPI/legacy mode, and
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* uninstalls the SCI interrupt handler.
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*
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*************************************************************************/
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ACPI_STATUS
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acpi_disable (void)
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{
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ACPI_STATUS status;
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/* Restore original mode */
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status = acpi_hw_set_mode (acpi_gbl_original_mode);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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/* Unload the SCI interrupt handler */
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acpi_ev_remove_sci_handler ();
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acpi_ev_restore_acpi_state ();
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_enable_event
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*
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* PARAMETERS: Event - The fixed event or GPE to be enabled
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* Type - The type of event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable an ACPI event (fixed and general purpose)
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_enable_event (
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u32 event,
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u32 type)
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{
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ACPI_STATUS status = AE_OK;
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u32 register_id;
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/* The Type must be either Fixed Acpi_event or GPE */
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switch (type) {
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case ACPI_EVENT_FIXED:
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/* Decode the Fixed Acpi_event */
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switch (event) {
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case ACPI_EVENT_PMTIMER:
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register_id = TMR_EN;
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break;
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case ACPI_EVENT_GLOBAL:
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register_id = GBL_EN;
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break;
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case ACPI_EVENT_POWER_BUTTON:
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register_id = PWRBTN_EN;
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break;
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case ACPI_EVENT_SLEEP_BUTTON:
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register_id = SLPBTN_EN;
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break;
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case ACPI_EVENT_RTC:
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register_id = RTC_EN;
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break;
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default:
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return (AE_BAD_PARAMETER);
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break;
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}
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/*
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* Enable the requested fixed event (by writing a one to the
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* enable register bit)
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*/
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acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 1);
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if (1 != acpi_hw_register_bit_access(ACPI_READ, ACPI_MTX_LOCK, register_id)) {
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return (AE_NO_HARDWARE_RESPONSE);
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}
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break;
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case ACPI_EVENT_GPE:
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/* Ensure that we have a valid GPE number */
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if ((event >= NUM_GPE) ||
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(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
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return (AE_BAD_PARAMETER);
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}
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/* Enable the requested GPE number */
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acpi_hw_enable_gpe (event);
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break;
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default:
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status = AE_BAD_PARAMETER;
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_disable_event
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*
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* PARAMETERS: Event - The fixed event or GPE to be enabled
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* Type - The type of event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable an ACPI event (fixed and general purpose)
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_disable_event (
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u32 event,
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u32 type)
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{
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ACPI_STATUS status = AE_OK;
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u32 register_id;
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/* The Type must be either Fixed Acpi_event or GPE */
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switch (type) {
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case ACPI_EVENT_FIXED:
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/* Decode the Fixed Acpi_event */
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switch (event) {
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case ACPI_EVENT_PMTIMER:
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register_id = TMR_EN;
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break;
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case ACPI_EVENT_GLOBAL:
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register_id = GBL_EN;
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break;
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case ACPI_EVENT_POWER_BUTTON:
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register_id = PWRBTN_EN;
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break;
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case ACPI_EVENT_SLEEP_BUTTON:
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register_id = SLPBTN_EN;
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break;
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case ACPI_EVENT_RTC:
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register_id = RTC_EN;
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break;
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default:
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return (AE_BAD_PARAMETER);
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break;
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}
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/*
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* Disable the requested fixed event (by writing a zero to the
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* enable register bit)
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*/
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acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 0);
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if (0 != acpi_hw_register_bit_access(ACPI_READ, ACPI_MTX_LOCK, register_id)) {
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return (AE_NO_HARDWARE_RESPONSE);
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}
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break;
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case ACPI_EVENT_GPE:
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/* Ensure that we have a valid GPE number */
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if ((event >= NUM_GPE) ||
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(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
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return (AE_BAD_PARAMETER);
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}
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/* Disable the requested GPE number */
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acpi_hw_disable_gpe (event);
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break;
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default:
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status = AE_BAD_PARAMETER;
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_clear_event
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*
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* PARAMETERS: Event - The fixed event or GPE to be cleared
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* Type - The type of event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear an ACPI event (fixed and general purpose)
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_clear_event (
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u32 event,
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u32 type)
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{
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ACPI_STATUS status = AE_OK;
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u32 register_id;
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/* The Type must be either Fixed Acpi_event or GPE */
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switch (type) {
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case ACPI_EVENT_FIXED:
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/* Decode the Fixed Acpi_event */
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switch (event) {
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case ACPI_EVENT_PMTIMER:
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register_id = TMR_STS;
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break;
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case ACPI_EVENT_GLOBAL:
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register_id = GBL_STS;
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break;
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case ACPI_EVENT_POWER_BUTTON:
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register_id = PWRBTN_STS;
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break;
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case ACPI_EVENT_SLEEP_BUTTON:
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register_id = SLPBTN_STS;
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break;
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case ACPI_EVENT_RTC:
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register_id = RTC_STS;
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break;
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default:
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return (AE_BAD_PARAMETER);
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break;
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}
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/*
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* Clear the requested fixed event (By writing a one to the
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* status register bit)
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*/
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acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, register_id, 1);
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break;
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case ACPI_EVENT_GPE:
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/* Ensure that we have a valid GPE number */
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if ((event >= NUM_GPE) ||
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(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
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return (AE_BAD_PARAMETER);
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}
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acpi_hw_clear_gpe (event);
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break;
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default:
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status = AE_BAD_PARAMETER;
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_get_event_status
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*
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* PARAMETERS: Event - The fixed event or GPE
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* Type - The type of event
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* Status - Where the current status of the event will
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* be returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Obtains and returns the current status of the event
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_get_event_status (
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u32 event,
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u32 type,
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ACPI_EVENT_STATUS *event_status)
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{
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ACPI_STATUS status = AE_OK;
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u32 register_id;
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if (!event_status) {
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return (AE_BAD_PARAMETER);
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}
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/* The Type must be either Fixed Acpi_event or GPE */
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switch (type) {
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case ACPI_EVENT_FIXED:
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/* Decode the Fixed Acpi_event */
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switch (event) {
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case ACPI_EVENT_PMTIMER:
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register_id = TMR_STS;
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break;
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case ACPI_EVENT_GLOBAL:
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register_id = GBL_STS;
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break;
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case ACPI_EVENT_POWER_BUTTON:
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register_id = PWRBTN_STS;
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break;
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case ACPI_EVENT_SLEEP_BUTTON:
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register_id = SLPBTN_STS;
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break;
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case ACPI_EVENT_RTC:
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register_id = RTC_STS;
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break;
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default:
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return (AE_BAD_PARAMETER);
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break;
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}
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/* Get the status of the requested fixed event */
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*event_status = acpi_hw_register_bit_access (ACPI_READ, ACPI_MTX_LOCK, register_id);
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break;
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case ACPI_EVENT_GPE:
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/* Ensure that we have a valid GPE number */
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if ((event >= NUM_GPE) ||
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(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID)) {
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return (AE_BAD_PARAMETER);
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}
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/* Obtain status on the requested GPE number */
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acpi_hw_get_gpe_status (event, event_status);
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break;
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default:
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status = AE_BAD_PARAMETER;
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}
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return (status);
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}
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