hwsleep.c
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上传日期:2013-04-10
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- /******************************************************************************
- *
- * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
- * $Revision: 22 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * 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 "acpi.h"
- #include "acnamesp.h"
- #include "achware.h"
- #define _COMPONENT ACPI_HARDWARE
- MODULE_NAME ("hwsleep")
- /******************************************************************************
- *
- * FUNCTION: Acpi_set_firmware_waking_vector
- *
- * PARAMETERS: Physical_address - Physical address of ACPI real mode
- * entry point.
- *
- * RETURN: AE_OK or AE_ERROR
- *
- * DESCRIPTION: Access function for d_firmware_waking_vector field in FACS
- *
- ******************************************************************************/
- acpi_status
- acpi_set_firmware_waking_vector (
- ACPI_PHYSICAL_ADDRESS physical_address)
- {
- FUNCTION_TRACE ("Acpi_set_firmware_waking_vector");
- /* Make sure that we have an FACS */
- if (!acpi_gbl_FACS) {
- return_ACPI_STATUS (AE_NO_ACPI_TABLES);
- }
- /* Set the vector */
- if (acpi_gbl_FACS->vector_width == 32) {
- * (u32 *) acpi_gbl_FACS->firmware_waking_vector = (u32) physical_address;
- }
- else {
- *acpi_gbl_FACS->firmware_waking_vector = physical_address;
- }
- return_ACPI_STATUS (AE_OK);
- }
- /******************************************************************************
- *
- * FUNCTION: Acpi_get_firmware_waking_vector
- *
- * PARAMETERS: *Physical_address - Output buffer where contents of
- * the Firmware_waking_vector field of
- * the FACS will be stored.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Access function for d_firmware_waking_vector field in FACS
- *
- ******************************************************************************/
- acpi_status
- acpi_get_firmware_waking_vector (
- ACPI_PHYSICAL_ADDRESS *physical_address)
- {
- FUNCTION_TRACE ("Acpi_get_firmware_waking_vector");
- if (!physical_address) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
- /* Make sure that we have an FACS */
- if (!acpi_gbl_FACS) {
- return_ACPI_STATUS (AE_NO_ACPI_TABLES);
- }
- /* Get the vector */
- if (acpi_gbl_FACS->vector_width == 32) {
- *physical_address = * (u32 *) acpi_gbl_FACS->firmware_waking_vector;
- }
- else {
- *physical_address = *acpi_gbl_FACS->firmware_waking_vector;
- }
- return_ACPI_STATUS (AE_OK);
- }
- /******************************************************************************
- *
- * FUNCTION: Acpi_enter_sleep_state
- *
- * PARAMETERS: Sleep_state - Which sleep state to enter
- *
- * RETURN: Status
- *
- * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
- *
- ******************************************************************************/
- acpi_status
- acpi_enter_sleep_state (
- u8 sleep_state)
- {
- acpi_status status;
- acpi_object_list arg_list;
- acpi_object arg;
- u8 type_a;
- u8 type_b;
- u16 PM1Acontrol;
- u16 PM1Bcontrol;
- FUNCTION_TRACE ("Acpi_enter_sleep_state");
- /*
- * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
- */
- status = acpi_hw_obtain_sleep_type_register_data (sleep_state, &type_a, &type_b);
- if (!ACPI_SUCCESS (status)) {
- return status;
- }
- /* run the _PTS and _GTS methods */
- MEMSET(&arg_list, 0, sizeof(arg_list));
- arg_list.count = 1;
- arg_list.pointer = &arg;
- MEMSET(&arg, 0, sizeof(arg));
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = sleep_state;
- acpi_evaluate_object (NULL, "\_PTS", &arg_list, NULL);
- acpi_evaluate_object (NULL, "\_GTS", &arg_list, NULL);
- /* clear wake status */
- acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK, WAK_STS, 1);
- disable ();
- acpi_hw_disable_non_wakeup_gpes();
- PM1Acontrol = (u16) acpi_hw_register_read (ACPI_MTX_LOCK, PM1_CONTROL);
- ACPI_DEBUG_PRINT ((ACPI_DB_OK, "Entering S%dn", sleep_state));
- /* mask off SLP_EN and SLP_TYP fields */
- PM1Acontrol &= ~(SLP_TYPE_X_MASK | SLP_EN_MASK);
- PM1Bcontrol = PM1Acontrol;
- /* mask in SLP_TYP */
- PM1Acontrol |= (type_a << acpi_hw_get_bit_shift (SLP_TYPE_X_MASK));
- PM1Bcontrol |= (type_b << acpi_hw_get_bit_shift (SLP_TYPE_X_MASK));
- /* write #1: fill in SLP_TYP data */
- acpi_hw_register_write (ACPI_MTX_LOCK, PM1A_CONTROL, PM1Acontrol);
- acpi_hw_register_write (ACPI_MTX_LOCK, PM1B_CONTROL, PM1Bcontrol);
- /* mask in SLP_EN */
- PM1Acontrol |= (1 << acpi_hw_get_bit_shift (SLP_EN_MASK));
- PM1Bcontrol |= (1 << acpi_hw_get_bit_shift (SLP_EN_MASK));
- /* flush caches */
- wbinvd();
- /* write #2: SLP_TYP + SLP_EN */
- acpi_hw_register_write (ACPI_MTX_LOCK, PM1A_CONTROL, PM1Acontrol);
- acpi_hw_register_write (ACPI_MTX_LOCK, PM1B_CONTROL, PM1Bcontrol);
- /*
- * Wait a second, then try again. This is to get S4/5 to work on all machines.
- */
- if (sleep_state > ACPI_STATE_S3) {
- acpi_os_stall(1000000);
- acpi_hw_register_write (ACPI_MTX_LOCK, PM1_CONTROL,
- (1 << acpi_hw_get_bit_shift (SLP_EN_MASK)));
- }
- /* wait until we enter sleep state */
- do {
- acpi_os_stall(10000);
- }
- while (!acpi_hw_register_bit_access (ACPI_READ, ACPI_MTX_LOCK, WAK_STS));
- acpi_hw_enable_non_wakeup_gpes();
- enable ();
- return_ACPI_STATUS (AE_OK);
- }
- /******************************************************************************
- *
- * FUNCTION: Acpi_leave_sleep_state
- *
- * PARAMETERS: Sleep_state - Which sleep state we just exited
- *
- * RETURN: Status
- *
- * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
- *
- ******************************************************************************/
- acpi_status
- acpi_leave_sleep_state (
- u8 sleep_state)
- {
- acpi_object_list arg_list;
- acpi_object arg;
- FUNCTION_TRACE ("Acpi_leave_sleep_state");
- MEMSET (&arg_list, 0, sizeof(arg_list));
- arg_list.count = 1;
- arg_list.pointer = &arg;
- MEMSET (&arg, 0, sizeof(arg));
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = sleep_state;
- acpi_evaluate_object (NULL, "\_BFS", &arg_list, NULL);
- acpi_evaluate_object (NULL, "\_WAK", &arg_list, NULL);
- /* _WAK returns stuff - do we want to look at it? */
- acpi_hw_enable_non_wakeup_gpes();
- return_ACPI_STATUS (AE_OK);
- }