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https://github.com/torvalds/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
583 lines
17 KiB
C
583 lines
17 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 - 2005, R. Byron Moore
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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 <linux/module.h>
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#include <acpi/acpi.h>
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwsleep")
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#define METHOD_NAME__BFS "\\_BFS"
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#define METHOD_NAME__GTS "\\_GTS"
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#define METHOD_NAME__PTS "\\_PTS"
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#define METHOD_NAME__SST "\\_SI._SST"
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#define METHOD_NAME__WAK "\\_WAK"
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#define ACPI_SST_INDICATOR_OFF 0
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#define ACPI_SST_WORKING 1
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#define ACPI_SST_WAKING 2
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#define ACPI_SST_SLEEPING 3
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#define ACPI_SST_SLEEP_CONTEXT 4
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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: 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_set_firmware_waking_vector (
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acpi_physical_address physical_address)
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{
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ACPI_FUNCTION_TRACE ("acpi_set_firmware_waking_vector");
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/* Set the vector */
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if (acpi_gbl_common_fACS.vector_width == 32) {
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*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector))
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= (u32) physical_address;
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}
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else {
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*acpi_gbl_common_fACS.firmware_waking_vector
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= physical_address;
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}
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return_ACPI_STATUS (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 firmware_waking_vector field in FACS
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*
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******************************************************************************/
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#ifdef ACPI_FUTURE_USAGE
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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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ACPI_FUNCTION_TRACE ("acpi_get_firmware_waking_vector");
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if (!physical_address) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Get the vector */
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if (acpi_gbl_common_fACS.vector_width == 32) {
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*physical_address = (acpi_physical_address)
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*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector));
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}
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else {
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*physical_address =
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*acpi_gbl_common_fACS.firmware_waking_vector;
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}
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return_ACPI_STATUS (AE_OK);
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}
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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
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acpi_enter_sleep_state_prep (
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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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/*
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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_get_sleep_type_data (sleep_state,
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&acpi_gbl_sleep_type_a, &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 and _GTS methods */
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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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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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/* 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 indicator off */
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break;
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}
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/* Set the system indicators to show the desired sleep state. */
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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_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
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}
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return_ACPI_STATUS (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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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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acpi_status asmlinkage
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acpi_enter_sleep_state (
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u8 sleep_state)
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{
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u32 PM1Acontrol;
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u32 PM1Bcontrol;
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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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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_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n",
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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 = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
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sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE);
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/* Clear wake status */
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status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
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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 (ACPI_MTX_DO_NOT_LOCK);
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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 (ACPI_ISR);
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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 (ACPI_ISR);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Get current value of PM1A control */
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status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
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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, "Entering sleep state [S%d]\n", sleep_state));
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/* Clear SLP_EN and SLP_TYP fields */
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PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info->access_bit_mask);
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PM1Bcontrol = PM1Acontrol;
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/* Insert SLP_TYP bits */
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PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
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PM1Bcontrol |= (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: fill in SLP_TYP data */
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status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
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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_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
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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 SLP_ENABLE bit */
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PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
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PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
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/* Write #2: SLP_TYP + SLP_EN */
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ACPI_FLUSH_CPU_CACHE ();
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status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
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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_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
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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 fact that
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* 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 all machines.
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*
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* We wait so long to allow chipsets that poll this reg very slowly to
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* 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_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL,
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sleep_enable_reg_info->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_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK);
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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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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
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acpi_enter_sleep_state_s4bios (
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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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status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
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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 (ACPI_MTX_DO_NOT_LOCK);
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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 (ACPI_ISR);
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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 (ACPI_ISR);
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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_os_write_port (acpi_gbl_FADT->smi_cmd, (u32) acpi_gbl_FADT->S4bios_req, 8);
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do {
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acpi_os_stall(1000);
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status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK);
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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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EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios);
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|
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/******************************************************************************
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*
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* FUNCTION: acpi_leave_sleep_state
|
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*
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* PARAMETERS: sleep_state - Which sleep state we just exited
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
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* Called with interrupts ENABLED.
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*
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******************************************************************************/
|
|
|
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acpi_status
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acpi_leave_sleep_state (
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u8 sleep_state)
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|
{
|
|
struct acpi_object_list arg_list;
|
|
union acpi_object arg;
|
|
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 PM1Acontrol;
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u32 PM1Bcontrol;
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|
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ACPI_FUNCTION_TRACE ("acpi_leave_sleep_state");
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|
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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, &acpi_gbl_sleep_type_b);
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if (ACPI_SUCCESS (status)) {
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sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
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sleep_enable_reg_info = 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_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
|
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if (ACPI_SUCCESS (status)) {
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/* Clear SLP_EN and SLP_TYP fields */
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|
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PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
|
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sleep_enable_reg_info->access_bit_mask);
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PM1Bcontrol = PM1Acontrol;
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|
|
|
/* Insert SLP_TYP bits */
|
|
|
|
PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
|
|
PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
|
|
|
|
/* Just ignore any errors */
|
|
|
|
(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
|
|
ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
|
|
(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
|
|
ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
|
|
}
|
|
}
|
|
|
|
/* 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_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
|
|
}
|
|
|
|
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_REPORT_ERROR (("Method _BFS failed, %s\n", acpi_format_exception (status)));
|
|
}
|
|
|
|
status = acpi_evaluate_object (NULL, METHOD_NAME__WAK, &arg_list, NULL);
|
|
if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
|
|
ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", acpi_format_exception (status)));
|
|
}
|
|
/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
|
|
|
|
/*
|
|
* Restore the GPEs:
|
|
* 1) Disable/Clear all GPEs
|
|
* 2) Enable all runtime GPEs
|
|
*/
|
|
status = acpi_hw_disable_all_gpes (ACPI_NOT_ISR);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
acpi_gbl_system_awake_and_running = TRUE;
|
|
|
|
status = acpi_hw_enable_all_runtime_gpes (ACPI_NOT_ISR);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Enable power button */
|
|
|
|
(void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].enable_register_id,
|
|
1, ACPI_MTX_DO_NOT_LOCK);
|
|
(void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].status_register_id,
|
|
1, ACPI_MTX_DO_NOT_LOCK);
|
|
|
|
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_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
|
|
}
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|