636 lines
18 KiB
C
636 lines
18 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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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "actables.h"
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#include <linux/tboot.h>
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#define _COMPONENT ACPI_HARDWARE
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ACPI_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 - 32-bit physical address of ACPI real mode
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* entry point.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
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*
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******************************************************************************/
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acpi_status
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acpi_set_firmware_waking_vector(u32 physical_address)
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{
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ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
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/*
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* According to the ACPI specification 2.0c and later, the 64-bit
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* waking vector should be cleared and the 32-bit waking vector should
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* be used, unless we want the wake-up code to be called by the BIOS in
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* Protected Mode. Some systems (for example HP dv5-1004nr) are known
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* to fail to resume if the 64-bit vector is used.
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*/
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/* Set the 32-bit vector */
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acpi_gbl_FACS->firmware_waking_vector = physical_address;
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/* Clear the 64-bit vector if it exists */
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if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
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acpi_gbl_FACS->xfirmware_waking_vector = 0;
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}
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
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#if ACPI_MACHINE_WIDTH == 64
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_firmware_waking_vector64
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*
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* PARAMETERS: physical_address - 64-bit physical address of ACPI protected
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* mode entry point.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
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* it exists in the table. This function is intended for use with
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* 64-bit host operating systems.
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*
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******************************************************************************/
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acpi_status
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acpi_set_firmware_waking_vector64(u64 physical_address)
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{
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ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
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/* Determine if the 64-bit vector actually exists */
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if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Clear 32-bit vector, set the 64-bit X_ vector */
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acpi_gbl_FACS->firmware_waking_vector = 0;
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acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_enter_sleep_state_prep
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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: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
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* This function must execute with interrupts enabled.
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* We break sleeping into 2 stages so that OSPM can handle
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* various OS-specific tasks between the two steps.
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*
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******************************************************************************/
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acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
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{
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acpi_status status;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
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/* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
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status = acpi_get_sleep_type_data(sleep_state,
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&acpi_gbl_sleep_type_a,
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&acpi_gbl_sleep_type_b);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Setup parameter object */
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = sleep_state;
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/* Run the _PTS method */
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status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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return_ACPI_STATUS(status);
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}
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/* Setup the argument to _SST */
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switch (sleep_state) {
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case ACPI_STATE_S0:
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arg.integer.value = ACPI_SST_WORKING;
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break;
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case ACPI_STATE_S1:
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case ACPI_STATE_S2:
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case ACPI_STATE_S3:
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arg.integer.value = ACPI_SST_SLEEPING;
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break;
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case ACPI_STATE_S4:
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arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
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break;
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default:
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arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
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break;
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}
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/*
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* Set the system indicators to show the desired sleep state.
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* _SST is an optional method (return no error if not found)
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*/
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status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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ACPI_EXCEPTION((AE_INFO, status,
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"While executing method _SST"));
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}
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
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static unsigned int gts, bfs;
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module_param(gts, uint, 0644);
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module_param(bfs, uint, 0644);
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MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
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MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
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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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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
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{
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u32 pm1a_control;
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u32 pm1b_control;
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struct acpi_bit_register_info *sleep_type_reg_info;
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struct acpi_bit_register_info *sleep_enable_reg_info;
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u32 in_value;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
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if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
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(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
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ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
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acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
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return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
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}
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sleep_type_reg_info =
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acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
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sleep_enable_reg_info =
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acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
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/* Clear wake status */
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status =
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acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Clear all fixed and general purpose status bits */
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status = acpi_hw_clear_acpi_status();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* 1) Disable/Clear all GPEs
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* 2) Enable all wakeup GPEs
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*/
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status = acpi_hw_disable_all_gpes();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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acpi_gbl_system_awake_and_running = FALSE;
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status = acpi_hw_enable_all_wakeup_gpes();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (gts) {
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/* Execute the _GTS method */
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = sleep_state;
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status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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return_ACPI_STATUS(status);
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}
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}
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/* Get current value of PM1A control */
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status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
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&pm1a_control);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INIT,
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"Entering sleep state [S%d]\n", sleep_state));
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/* Clear the SLP_EN and SLP_TYP fields */
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pm1a_control &= ~(sleep_type_reg_info->access_bit_mask |
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sleep_enable_reg_info->access_bit_mask);
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pm1b_control = pm1a_control;
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/* Insert the SLP_TYP bits */
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pm1a_control |=
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(acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
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pm1b_control |=
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(acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
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/*
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* We split the writes of SLP_TYP and SLP_EN to workaround
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* poorly implemented hardware.
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*/
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/* Write #1: write the SLP_TYP data to the PM1 Control registers */
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status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Insert the sleep enable (SLP_EN) bit */
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pm1a_control |= sleep_enable_reg_info->access_bit_mask;
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pm1b_control |= sleep_enable_reg_info->access_bit_mask;
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/* Flush caches, as per ACPI specification */
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ACPI_FLUSH_CPU_CACHE();
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tboot_sleep(sleep_state, pm1a_control, pm1b_control);
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/* Write #2: Write both SLP_TYP + SLP_EN */
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status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (sleep_state > ACPI_STATE_S3) {
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/*
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* We wanted to sleep > S3, but it didn't happen (by virtue of the
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* fact that we are still executing!)
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*
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* Wait ten seconds, then try again. This is to get S4/S5 to work on
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* all machines.
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*
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* We wait so long to allow chipsets that poll this reg very slowly
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* to still read the right value. Ideally, this block would go
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* away entirely.
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*/
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acpi_os_stall(10000000);
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status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
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sleep_enable_reg_info->
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access_bit_mask);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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/* Wait until we enter sleep state */
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do {
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status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
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&in_value);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Spin until we wake */
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} while (!in_value);
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
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/*******************************************************************************
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*
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* FUNCTION: acpi_enter_sleep_state_s4bios
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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: Perform a S4 bios request.
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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
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{
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u32 in_value;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
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/* Clear the wake status bit (PM1) */
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status =
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acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status = acpi_hw_clear_acpi_status();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* 1) Disable/Clear all GPEs
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* 2) Enable all wakeup GPEs
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*/
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status = acpi_hw_disable_all_gpes();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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acpi_gbl_system_awake_and_running = FALSE;
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status = acpi_hw_enable_all_wakeup_gpes();
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_FLUSH_CPU_CACHE();
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status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
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(u32) acpi_gbl_FADT.S4bios_request, 8);
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do {
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acpi_os_stall(1000);
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status =
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acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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} while (!in_value);
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return_ACPI_STATUS(AE_OK);
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}
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ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
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/*******************************************************************************
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*
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* FUNCTION: acpi_leave_sleep_state_prep
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*
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* PARAMETERS: sleep_state - Which sleep state we are exiting
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
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* sleep.
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* Called with interrupts DISABLED.
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*
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******************************************************************************/
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acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
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{
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status;
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struct acpi_bit_register_info *sleep_type_reg_info;
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struct acpi_bit_register_info *sleep_enable_reg_info;
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u32 pm1a_control;
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u32 pm1b_control;
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ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
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/*
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* Set SLP_TYPE and SLP_EN to state S0.
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* This is unclear from the ACPI Spec, but it is required
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* by some machines.
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*/
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status = acpi_get_sleep_type_data(ACPI_STATE_S0,
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&acpi_gbl_sleep_type_a,
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&acpi_gbl_sleep_type_b);
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if (ACPI_SUCCESS(status)) {
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sleep_type_reg_info =
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acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
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sleep_enable_reg_info =
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acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
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/* Get current value of PM1A control */
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status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
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&pm1a_control);
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if (ACPI_SUCCESS(status)) {
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/* Clear the SLP_EN and SLP_TYP fields */
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pm1a_control &= ~(sleep_type_reg_info->access_bit_mask |
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sleep_enable_reg_info->
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access_bit_mask);
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pm1b_control = pm1a_control;
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/* Insert the SLP_TYP bits */
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pm1a_control |= (acpi_gbl_sleep_type_a <<
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sleep_type_reg_info->bit_position);
|
|
pm1b_control |= (acpi_gbl_sleep_type_b <<
|
|
sleep_type_reg_info->bit_position);
|
|
|
|
/* Write the control registers and ignore any errors */
|
|
|
|
(void)acpi_hw_write_pm1_control(pm1a_control,
|
|
pm1b_control);
|
|
}
|
|
}
|
|
|
|
if (bfs) {
|
|
/* Execute the _BFS method */
|
|
|
|
arg_list.count = 1;
|
|
arg_list.pointer = &arg;
|
|
arg.type = ACPI_TYPE_INTEGER;
|
|
arg.integer.value = sleep_state;
|
|
|
|
status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
|
|
}
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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
|
|
* Called with interrupts ENABLED.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_leave_sleep_state(u8 sleep_state)
|
|
{
|
|
struct acpi_object_list arg_list;
|
|
union acpi_object arg;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
|
|
|
|
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
|
|
|
|
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
|
|
|
|
/* Setup parameter object */
|
|
|
|
arg_list.count = 1;
|
|
arg_list.pointer = &arg;
|
|
arg.type = ACPI_TYPE_INTEGER;
|
|
|
|
/* Ignore any errors from these methods */
|
|
|
|
arg.integer.value = ACPI_SST_WAKING;
|
|
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
|
|
}
|
|
|
|
/*
|
|
* GPEs must be enabled before _WAK is called as GPEs
|
|
* might get fired there
|
|
*
|
|
* Restore the GPEs:
|
|
* 1) Disable/Clear all GPEs
|
|
* 2) Enable all runtime GPEs
|
|
*/
|
|
status = acpi_hw_disable_all_gpes();
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
status = acpi_hw_enable_all_runtime_gpes();
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
arg.integer.value = sleep_state;
|
|
status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
|
|
}
|
|
/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
|
|
|
|
/*
|
|
* Some BIOSes assume that WAK_STS will be cleared on resume and use
|
|
* it to determine whether the system is rebooting or resuming. Clear
|
|
* it for compatibility.
|
|
*/
|
|
acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1);
|
|
|
|
acpi_gbl_system_awake_and_running = TRUE;
|
|
|
|
/* Enable power button */
|
|
|
|
(void)
|
|
acpi_write_bit_register(acpi_gbl_fixed_event_info
|
|
[ACPI_EVENT_POWER_BUTTON].
|
|
enable_register_id, ACPI_ENABLE_EVENT);
|
|
|
|
(void)
|
|
acpi_write_bit_register(acpi_gbl_fixed_event_info
|
|
[ACPI_EVENT_POWER_BUTTON].
|
|
status_register_id, ACPI_CLEAR_STATUS);
|
|
|
|
arg.integer.value = ACPI_SST_WORKING;
|
|
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
|