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501 lines
14 KiB
501 lines
14 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: evgpeblk - GPE block creation and initialization. |
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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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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acevents.h" |
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#include "acnamesp.h" |
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#define _COMPONENT ACPI_EVENTS |
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ACPI_MODULE_NAME("evgpeblk") |
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
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/* Local prototypes */ |
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static acpi_status |
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acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
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u32 interrupt_number); |
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static acpi_status |
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acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_install_gpe_block |
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* |
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* PARAMETERS: gpe_block - New GPE block |
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* interrupt_number - Xrupt to be associated with this |
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* GPE block |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Install new GPE block with mutex support |
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* |
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******************************************************************************/ |
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static acpi_status |
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acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
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u32 interrupt_number) |
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{ |
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struct acpi_gpe_block_info *next_gpe_block; |
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struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
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acpi_status status; |
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acpi_cpu_flags flags; |
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ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
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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 = |
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acpi_ev_get_gpe_xrupt_block(interrupt_number, &gpe_xrupt_block); |
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if (ACPI_FAILURE(status)) { |
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goto unlock_and_exit; |
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} |
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/* Install the new block at the end of the list with lock */ |
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
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if (gpe_xrupt_block->gpe_block_list_head) { |
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next_gpe_block = gpe_xrupt_block->gpe_block_list_head; |
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while (next_gpe_block->next) { |
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next_gpe_block = next_gpe_block->next; |
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} |
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next_gpe_block->next = gpe_block; |
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gpe_block->previous = next_gpe_block; |
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} else { |
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gpe_xrupt_block->gpe_block_list_head = gpe_block; |
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} |
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gpe_block->xrupt_block = gpe_xrupt_block; |
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
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unlock_and_exit: |
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_delete_gpe_block |
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* |
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* PARAMETERS: gpe_block - Existing GPE block |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Remove a GPE block |
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* |
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******************************************************************************/ |
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acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
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{ |
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acpi_status status; |
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acpi_cpu_flags flags; |
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ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Disable all GPEs in this block */ |
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status = |
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acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); |
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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 (!gpe_block->previous && !gpe_block->next) { |
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/* This is the last gpe_block on this interrupt */ |
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status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
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if (ACPI_FAILURE(status)) { |
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goto unlock_and_exit; |
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} |
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} else { |
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/* Remove the block on this interrupt with lock */ |
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
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if (gpe_block->previous) { |
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gpe_block->previous->next = gpe_block->next; |
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} else { |
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gpe_block->xrupt_block->gpe_block_list_head = |
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gpe_block->next; |
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} |
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if (gpe_block->next) { |
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gpe_block->next->previous = gpe_block->previous; |
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} |
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
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} |
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acpi_current_gpe_count -= gpe_block->gpe_count; |
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/* Free the gpe_block */ |
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ACPI_FREE(gpe_block->register_info); |
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ACPI_FREE(gpe_block->event_info); |
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ACPI_FREE(gpe_block); |
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unlock_and_exit: |
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status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_create_gpe_info_blocks |
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* |
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* PARAMETERS: gpe_block - New GPE block |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create the register_info and event_info blocks for this GPE block |
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* |
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******************************************************************************/ |
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static acpi_status |
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acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
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{ |
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struct acpi_gpe_register_info *gpe_register_info = NULL; |
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struct acpi_gpe_event_info *gpe_event_info = NULL; |
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struct acpi_gpe_event_info *this_event; |
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struct acpi_gpe_register_info *this_register; |
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u32 i; |
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u32 j; |
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acpi_status status; |
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ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
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/* Allocate the GPE register information block */ |
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gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size)gpe_block-> |
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register_count * |
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sizeof(struct |
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acpi_gpe_register_info)); |
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if (!gpe_register_info) { |
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ACPI_ERROR((AE_INFO, |
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"Could not allocate the GpeRegisterInfo table")); |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* |
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* Allocate the GPE event_info block. There are eight distinct GPEs |
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* per register. Initialization to zeros is sufficient. |
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*/ |
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gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size)gpe_block->gpe_count * |
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sizeof(struct |
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acpi_gpe_event_info)); |
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if (!gpe_event_info) { |
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ACPI_ERROR((AE_INFO, |
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"Could not allocate the GpeEventInfo table")); |
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status = AE_NO_MEMORY; |
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goto error_exit; |
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} |
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/* Save the new Info arrays in the GPE block */ |
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gpe_block->register_info = gpe_register_info; |
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gpe_block->event_info = gpe_event_info; |
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/* |
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* Initialize the GPE Register and Event structures. A goal of these |
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* tables is to hide the fact that there are two separate GPE register |
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* sets in a given GPE hardware block, the status registers occupy the |
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* first half, and the enable registers occupy the second half. |
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*/ |
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this_register = gpe_register_info; |
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this_event = gpe_event_info; |
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for (i = 0; i < gpe_block->register_count; i++) { |
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/* Init the register_info for this GPE register (8 GPEs) */ |
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this_register->base_gpe_number = (u16) |
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(gpe_block->block_base_number + |
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(i * ACPI_GPE_REGISTER_WIDTH)); |
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this_register->status_address.address = gpe_block->address + i; |
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this_register->enable_address.address = |
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gpe_block->address + i + gpe_block->register_count; |
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this_register->status_address.space_id = gpe_block->space_id; |
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this_register->enable_address.space_id = gpe_block->space_id; |
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/* Init the event_info for each GPE within this register */ |
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { |
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this_event->gpe_number = |
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(u8) (this_register->base_gpe_number + j); |
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this_event->register_info = this_register; |
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this_event++; |
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} |
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/* Disable all GPEs within this register */ |
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status = acpi_hw_gpe_write(0x00, &this_register->enable_address); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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/* Clear any pending GPE events within this register */ |
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status = acpi_hw_gpe_write(0xFF, &this_register->status_address); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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this_register++; |
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} |
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return_ACPI_STATUS(AE_OK); |
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error_exit: |
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if (gpe_register_info) { |
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ACPI_FREE(gpe_register_info); |
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} |
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if (gpe_event_info) { |
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ACPI_FREE(gpe_event_info); |
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} |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_create_gpe_block |
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* |
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* PARAMETERS: gpe_device - Handle to the parent GPE block |
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* gpe_block_address - Address and space_ID |
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* register_count - Number of GPE register pairs in the block |
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* gpe_block_base_number - Starting GPE number for the block |
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* interrupt_number - H/W interrupt for the block |
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* return_gpe_block - Where the new block descriptor is returned |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
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* the block are disabled at exit. |
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* Note: Assumes namespace is locked. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
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u64 address, |
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u8 space_id, |
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u32 register_count, |
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u16 gpe_block_base_number, |
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u32 interrupt_number, |
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struct acpi_gpe_block_info **return_gpe_block) |
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{ |
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acpi_status status; |
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struct acpi_gpe_block_info *gpe_block; |
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struct acpi_gpe_walk_info walk_info; |
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ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
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if (!register_count) { |
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return_ACPI_STATUS(AE_OK); |
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} |
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/* Validate the space_ID */ |
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if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) && |
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(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) { |
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ACPI_ERROR((AE_INFO, |
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"Unsupported address space: 0x%X", space_id)); |
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return_ACPI_STATUS(AE_SUPPORT); |
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} |
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if (space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
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status = acpi_hw_validate_io_block(address, |
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ACPI_GPE_REGISTER_WIDTH, |
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register_count); |
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if (ACPI_FAILURE(status)) |
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return_ACPI_STATUS(status); |
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} |
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/* Allocate a new GPE block */ |
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gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
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if (!gpe_block) { |
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return_ACPI_STATUS(AE_NO_MEMORY); |
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} |
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/* Initialize the new GPE block */ |
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gpe_block->address = address; |
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gpe_block->space_id = space_id; |
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gpe_block->node = gpe_device; |
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gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH); |
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gpe_block->initialized = FALSE; |
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gpe_block->register_count = register_count; |
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gpe_block->block_base_number = gpe_block_base_number; |
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/* |
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* Create the register_info and event_info sub-structures |
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* Note: disables and clears all GPEs in the block |
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*/ |
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status = acpi_ev_create_gpe_info_blocks(gpe_block); |
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if (ACPI_FAILURE(status)) { |
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ACPI_FREE(gpe_block); |
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return_ACPI_STATUS(status); |
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} |
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/* Install the new block in the global lists */ |
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status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
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if (ACPI_FAILURE(status)) { |
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ACPI_FREE(gpe_block->register_info); |
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ACPI_FREE(gpe_block->event_info); |
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ACPI_FREE(gpe_block); |
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return_ACPI_STATUS(status); |
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} |
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acpi_gbl_all_gpes_initialized = FALSE; |
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/* Find all GPE methods (_Lxx or_Exx) for this block */ |
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walk_info.gpe_block = gpe_block; |
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walk_info.gpe_device = gpe_device; |
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walk_info.execute_by_owner_id = FALSE; |
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(void)acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
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ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, |
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acpi_ev_match_gpe_method, NULL, &walk_info, |
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NULL); |
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/* Return the new block */ |
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if (return_gpe_block) { |
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(*return_gpe_block) = gpe_block; |
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} |
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
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" Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\n", |
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(u32)gpe_block->block_base_number, |
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(u32)(gpe_block->block_base_number + |
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(gpe_block->gpe_count - 1)), |
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gpe_device->name.ascii, gpe_block->register_count, |
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interrupt_number, |
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interrupt_number == |
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acpi_gbl_FADT.sci_interrupt ? " (SCI)" : "")); |
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/* Update global count of currently available GPEs */ |
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acpi_current_gpe_count += gpe_block->gpe_count; |
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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_ev_initialize_gpe_block |
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* |
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* PARAMETERS: acpi_gpe_callback |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have |
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* associated methods. |
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* Note: Assumes namespace is locked. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
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struct acpi_gpe_block_info *gpe_block, |
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void *context) |
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{ |
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acpi_status status; |
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struct acpi_gpe_event_info *gpe_event_info; |
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u32 gpe_enabled_count; |
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u32 gpe_index; |
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u32 i; |
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u32 j; |
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u8 *is_polling_needed = context; |
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ACPI_ERROR_ONLY(u32 gpe_number); |
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ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
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/* |
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* Ignore a null GPE block (e.g., if no GPE block 1 exists), and |
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* any GPE blocks that have been initialized already. |
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*/ |
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if (!gpe_block || gpe_block->initialized) { |
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return_ACPI_STATUS(AE_OK); |
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} |
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/* |
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* Enable all GPEs that have a corresponding method and have the |
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* ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block |
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* must be enabled via the acpi_enable_gpe() interface. |
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*/ |
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gpe_enabled_count = 0; |
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for (i = 0; i < gpe_block->register_count; i++) { |
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { |
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/* Get the info block for this particular GPE */ |
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gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j; |
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gpe_event_info = &gpe_block->event_info[gpe_index]; |
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ACPI_ERROR_ONLY(gpe_number = |
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gpe_block->block_base_number + |
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gpe_index); |
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gpe_event_info->flags |= ACPI_GPE_INITIALIZED; |
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/* |
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* Ignore GPEs that have no corresponding _Lxx/_Exx method |
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* and GPEs that are used for wakeup |
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*/ |
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if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != |
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ACPI_GPE_DISPATCH_METHOD) |
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|| (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { |
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continue; |
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} |
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status = acpi_ev_add_gpe_reference(gpe_event_info, FALSE); |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"Could not enable GPE 0x%02X", |
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gpe_number)); |
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continue; |
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} |
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gpe_event_info->flags |= ACPI_GPE_AUTO_ENABLED; |
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if (is_polling_needed && |
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ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { |
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*is_polling_needed = TRUE; |
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} |
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gpe_enabled_count++; |
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} |
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} |
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if (gpe_enabled_count) { |
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ACPI_INFO(("Enabled %u GPEs in block %02X to %02X", |
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gpe_enabled_count, (u32)gpe_block->block_base_number, |
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(u32)(gpe_block->block_base_number + |
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(gpe_block->gpe_count - 1)))); |
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} |
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gpe_block->initialized = TRUE; |
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return_ACPI_STATUS(AE_OK); |
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} |
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#endif /* !ACPI_REDUCED_HARDWARE */
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