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c501d8112c
svn path=/branches/aicom-network-fixes/; revision=34994
187 lines
4.8 KiB
C
187 lines
4.8 KiB
C
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/******************************************************************************
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*
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* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
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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_HARDWARE
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MODULE_NAME ("hwsleep")
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/******************************************************************************
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*
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* FUNCTION: Acpi_set_firmware_waking_vector
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*
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* PARAMETERS: Physical_address - Physical address of ACPI real mode
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* entry point.
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*
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* RETURN: AE_OK or AE_ERROR
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*
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* DESCRIPTION: Access function for d_firmware_waking_vector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_set_firmware_waking_vector (
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ACPI_PHYSICAL_ADDRESS physical_address)
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{
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/* Make sure that we have an FACS */
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if (!acpi_gbl_FACS) {
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return (AE_NO_ACPI_TABLES);
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}
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/* Set the vector */
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if (acpi_gbl_FACS->vector_width == 32) {
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* (u32 *) acpi_gbl_FACS->firmware_waking_vector = (u32) physical_address;
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}
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else {
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*acpi_gbl_FACS->firmware_waking_vector = physical_address;
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_get_firmware_waking_vector
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*
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* PARAMETERS: *Physical_address - Output buffer where contents of
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* the Firmware_waking_vector field of
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* the FACS will be stored.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Access function for d_firmware_waking_vector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_get_firmware_waking_vector (
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ACPI_PHYSICAL_ADDRESS *physical_address)
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{
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if (!physical_address) {
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return (AE_BAD_PARAMETER);
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}
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/* Make sure that we have an FACS */
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if (!acpi_gbl_FACS) {
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return (AE_NO_ACPI_TABLES);
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}
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/* Get the vector */
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if (acpi_gbl_FACS->vector_width == 32) {
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*physical_address = * (u32 *) acpi_gbl_FACS->firmware_waking_vector;
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}
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else {
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*physical_address = *acpi_gbl_FACS->firmware_waking_vector;
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: Acpi_enter_sleep_state
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*
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* PARAMETERS: Sleep_state - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_enter_sleep_state (
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u8 sleep_state)
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{
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ACPI_STATUS status;
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ACPI_OBJECT_LIST arg_list;
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ACPI_OBJECT arg;
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u8 type_a;
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u8 type_b;
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u16 PM1_acontrol;
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u16 PM1_bcontrol;
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/*
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* _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
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*/
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status = acpi_hw_obtain_sleep_type_register_data(sleep_state, &type_a, &type_b);
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if (!ACPI_SUCCESS(status)) {
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return status;
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}
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/* run the _PTS and _GTS methods */
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MEMSET(&arg_list, 0, sizeof(arg_list));
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arg_list.count = 1;
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arg_list.pointer = &arg;
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MEMSET(&arg, 0, sizeof(arg));
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = sleep_state;
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acpi_evaluate_object(NULL, "\\_PTS", &arg_list, NULL);
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acpi_evaluate_object(NULL, "\\_GTS", &arg_list, NULL);
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/* clear wake status */
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acpi_hw_register_bit_access(ACPI_WRITE, ACPI_MTX_LOCK, WAK_STS, 1);
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PM1_acontrol = (u16) acpi_hw_register_read(ACPI_MTX_LOCK, PM1_CONTROL);
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/* mask off SLP_EN and SLP_TYP fields */
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PM1_acontrol &= 0xC3FF;
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/* mask in SLP_EN */
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PM1_acontrol |= (1 << acpi_hw_get_bit_shift (SLP_EN_MASK));
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PM1_bcontrol = PM1_acontrol;
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/* mask in SLP_TYP */
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PM1_acontrol |= (type_a << acpi_hw_get_bit_shift (SLP_TYPE_X_MASK));
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PM1_bcontrol |= (type_b << acpi_hw_get_bit_shift (SLP_TYPE_X_MASK));
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disable();
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acpi_hw_register_write(ACPI_MTX_LOCK, PM1_a_CONTROL, PM1_acontrol);
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acpi_hw_register_write(ACPI_MTX_LOCK, PM1_b_CONTROL, PM1_bcontrol);
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acpi_hw_register_write(ACPI_MTX_LOCK, PM1_CONTROL,
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(1 << acpi_hw_get_bit_shift (SLP_EN_MASK)));
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enable();
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return (AE_OK);
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}
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