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363 lines
9.7 KiB
363 lines
9.7 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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#define EXPORT_ACPI_INTERFACES |
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#define _COMPONENT ACPI_HARDWARE |
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ACPI_MODULE_NAME("hwxfsleep") |
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/* Local prototypes */ |
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#if (!ACPI_REDUCED_HARDWARE) |
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static acpi_status |
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acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs, |
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acpi_physical_address physical_address, |
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acpi_physical_address physical_address64); |
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#endif |
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/* |
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* These functions are removed for the ACPI_REDUCED_HARDWARE case: |
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* acpi_set_firmware_waking_vector |
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* acpi_enter_sleep_state_s4bios |
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*/ |
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#if (!ACPI_REDUCED_HARDWARE) |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_hw_set_firmware_waking_vector |
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* |
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* PARAMETERS: facs - Pointer to FACS table |
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* physical_address - 32-bit physical address of ACPI real mode |
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* entry point |
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* physical_address64 - 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 firmware_waking_vector fields of the FACS |
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* |
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******************************************************************************/ |
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static acpi_status |
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acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs, |
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acpi_physical_address physical_address, |
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acpi_physical_address physical_address64) |
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{ |
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ACPI_FUNCTION_TRACE(acpi_hw_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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facs->firmware_waking_vector = (u32)physical_address; |
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if (facs->length > 32) { |
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if (facs->version >= 1) { |
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/* Set the 64-bit vector */ |
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facs->xfirmware_waking_vector = physical_address64; |
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} else { |
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/* Clear the 64-bit vector if it exists */ |
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facs->xfirmware_waking_vector = 0; |
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} |
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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_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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* physical_address64 - 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 firmware_waking_vector fields 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(acpi_physical_address physical_address, |
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acpi_physical_address physical_address64) |
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{ |
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ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
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if (acpi_gbl_FACS) { |
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(void)acpi_hw_set_firmware_waking_vector(acpi_gbl_FACS, |
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physical_address, |
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physical_address64); |
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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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/******************************************************************************* |
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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 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 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.s4_bios_request, 8); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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do { |
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acpi_os_stall(ACPI_USEC_PER_MSEC); |
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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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#endif /* !ACPI_REDUCED_HARDWARE */ |
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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. |
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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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u32 sst_value; |
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ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
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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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/* Execute the _PTS method (Prepare To Sleep) */ |
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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 = |
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acpi_evaluate_object(NULL, METHOD_PATHNAME__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 the _SST method (System STatus) */ |
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switch (sleep_state) { |
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case ACPI_STATE_S0: |
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sst_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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sst_value = ACPI_SST_SLEEPING; |
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break; |
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case ACPI_STATE_S4: |
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sst_value = ACPI_SST_SLEEP_CONTEXT; |
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break; |
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default: |
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sst_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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acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, sst_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_prep) |
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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 |
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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 acpi_enter_sleep_state(u8 sleep_state) |
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{ |
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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=0x%X B=0x%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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#if !ACPI_REDUCED_HARDWARE |
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if (!acpi_gbl_reduced_hardware) |
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status = acpi_hw_legacy_sleep(sleep_state); |
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else |
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#endif |
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status = acpi_hw_extended_sleep(sleep_state); |
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return_ACPI_STATUS(status); |
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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_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. Called with interrupts DISABLED. |
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* We break wake/resume 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_leave_sleep_state_prep(u8 sleep_state) |
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{ |
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acpi_status status; |
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ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
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#if !ACPI_REDUCED_HARDWARE |
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if (!acpi_gbl_reduced_hardware) |
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status = acpi_hw_legacy_wake_prep(sleep_state); |
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else |
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#endif |
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status = acpi_hw_extended_wake_prep(sleep_state); |
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return_ACPI_STATUS(status); |
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} |
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ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep) |
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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 are exiting |
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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 acpi_leave_sleep_state(u8 sleep_state) |
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{ |
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acpi_status status; |
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ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); |
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#if !ACPI_REDUCED_HARDWARE |
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if (!acpi_gbl_reduced_hardware) |
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status = acpi_hw_legacy_wake(sleep_state); |
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else |
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#endif |
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status = acpi_hw_extended_wake(sleep_state); |
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return_ACPI_STATUS(status); |
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} |
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ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
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