514 lines
13 KiB
C
514 lines
13 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: hwgpe - Low level GPE enable/disable/clear functions
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*
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* Copyright (C) 2000 - 2018, 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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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME("hwgpe")
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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_hw_enable_wakeup_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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static acpi_status
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acpi_hw_gpe_enable_write(u8 enable_mask,
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struct acpi_gpe_register_info *gpe_register_info);
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_get_gpe_register_bit
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*
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* PARAMETERS: gpe_event_info - Info block for the GPE
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*
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* RETURN: Register mask with a one in the GPE bit position
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*
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* DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
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* correct position for the input GPE.
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*
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******************************************************************************/
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u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
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{
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return ((u32)1 <<
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(gpe_event_info->gpe_number -
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gpe_event_info->register_info->base_gpe_number));
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_low_set_gpe
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*
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* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
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* action - Enable or disable
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable or disable a single GPE in the parent enable register.
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* The enable_mask field of the involved GPE register must be
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* updated by the caller if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
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{
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struct acpi_gpe_register_info *gpe_register_info;
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acpi_status status = AE_OK;
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u64 enable_mask;
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u32 register_bit;
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ACPI_FUNCTION_ENTRY();
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/* Get the info block for the entire GPE register */
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gpe_register_info = gpe_event_info->register_info;
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if (!gpe_register_info) {
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return (AE_NOT_EXIST);
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}
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/* Get current value of the enable register that contains this GPE */
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status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Set or clear just the bit that corresponds to this GPE */
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register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
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switch (action) {
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case ACPI_GPE_CONDITIONAL_ENABLE:
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/* Only enable if the corresponding enable_mask bit is set */
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if (!(register_bit & gpe_register_info->enable_mask)) {
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return (AE_BAD_PARAMETER);
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}
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/*lint -fallthrough */
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case ACPI_GPE_ENABLE:
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ACPI_SET_BIT(enable_mask, register_bit);
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break;
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case ACPI_GPE_DISABLE:
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ACPI_CLEAR_BIT(enable_mask, register_bit);
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break;
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default:
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ACPI_ERROR((AE_INFO, "Invalid GPE Action, %u", action));
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return (AE_BAD_PARAMETER);
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}
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if (!(register_bit & gpe_register_info->mask_for_run)) {
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/* Write the updated enable mask */
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status =
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acpi_hw_write(enable_mask,
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&gpe_register_info->enable_address);
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_clear_gpe
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*
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* PARAMETERS: gpe_event_info - Info block for the GPE to be cleared
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear the status bit for a single GPE.
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*
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******************************************************************************/
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acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
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{
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struct acpi_gpe_register_info *gpe_register_info;
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acpi_status status;
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u32 register_bit;
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ACPI_FUNCTION_ENTRY();
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/* Get the info block for the entire GPE register */
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gpe_register_info = gpe_event_info->register_info;
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if (!gpe_register_info) {
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return (AE_NOT_EXIST);
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}
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/*
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* Write a one to the appropriate bit in the status register to
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* clear this GPE.
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*/
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register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
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status =
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acpi_hw_write(register_bit, &gpe_register_info->status_address);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_get_gpe_status
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*
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* PARAMETERS: gpe_event_info - Info block for the GPE to queried
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* event_status - Where the GPE status is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the status of a single GPE.
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*
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******************************************************************************/
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acpi_status
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acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
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acpi_event_status *event_status)
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{
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u64 in_byte;
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u32 register_bit;
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struct acpi_gpe_register_info *gpe_register_info;
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acpi_event_status local_event_status = 0;
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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if (!event_status) {
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return (AE_BAD_PARAMETER);
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}
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/* GPE currently handled? */
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if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
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ACPI_GPE_DISPATCH_NONE) {
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local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
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}
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/* Get the info block for the entire GPE register */
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gpe_register_info = gpe_event_info->register_info;
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/* Get the register bitmask for this GPE */
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register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
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/* GPE currently enabled? (enabled for runtime?) */
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if (register_bit & gpe_register_info->enable_for_run) {
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local_event_status |= ACPI_EVENT_FLAG_ENABLED;
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}
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/* GPE currently masked? (masked for runtime?) */
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if (register_bit & gpe_register_info->mask_for_run) {
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local_event_status |= ACPI_EVENT_FLAG_MASKED;
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}
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/* GPE enabled for wake? */
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if (register_bit & gpe_register_info->enable_for_wake) {
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local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
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}
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/* GPE currently enabled (enable bit == 1)? */
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status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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if (register_bit & in_byte) {
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local_event_status |= ACPI_EVENT_FLAG_ENABLE_SET;
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}
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/* GPE currently active (status bit == 1)? */
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status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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if (register_bit & in_byte) {
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local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
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}
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/* Set return value */
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(*event_status) = local_event_status;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_gpe_enable_write
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*
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* PARAMETERS: enable_mask - Bit mask to write to the GPE register
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* gpe_register_info - Gpe Register info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write the enable mask byte to the given GPE register.
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*
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******************************************************************************/
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static acpi_status
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acpi_hw_gpe_enable_write(u8 enable_mask,
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struct acpi_gpe_register_info *gpe_register_info)
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{
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acpi_status status;
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gpe_register_info->enable_mask = enable_mask;
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status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_disable_gpe_block
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*
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* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
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* gpe_block - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable all GPEs within a single GPE block
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*
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******************************************************************************/
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acpi_status
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acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block, void *context)
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{
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u32 i;
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acpi_status status;
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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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/* Disable all GPEs in this register */
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status =
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acpi_hw_gpe_enable_write(0x00,
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&gpe_block->register_info[i]);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_clear_gpe_block
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*
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* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
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* gpe_block - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear status bits for all GPEs within a single GPE block
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*
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******************************************************************************/
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acpi_status
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acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block, void *context)
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{
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u32 i;
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acpi_status status;
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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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/* Clear status on all GPEs in this register */
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status =
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acpi_hw_write(0xFF,
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&gpe_block->register_info[i].status_address);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_enable_runtime_gpe_block
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*
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* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
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* gpe_block - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
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* combination wake/run GPEs.
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*
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******************************************************************************/
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acpi_status
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acpi_hw_enable_runtime_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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u32 i;
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acpi_status status;
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struct acpi_gpe_register_info *gpe_register_info;
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u8 enable_mask;
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/* NOTE: assumes that all GPEs are currently disabled */
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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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gpe_register_info = &gpe_block->register_info[i];
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if (!gpe_register_info->enable_for_run) {
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continue;
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}
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/* Enable all "runtime" GPEs in this register */
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enable_mask = gpe_register_info->enable_for_run &
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~gpe_register_info->mask_for_run;
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status =
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acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_enable_wakeup_gpe_block
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*
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* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
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* gpe_block - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
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* combination wake/run GPEs.
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*
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******************************************************************************/
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static acpi_status
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acpi_hw_enable_wakeup_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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u32 i;
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acpi_status status;
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struct acpi_gpe_register_info *gpe_register_info;
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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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gpe_register_info = &gpe_block->register_info[i];
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/*
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* Enable all "wake" GPEs in this register and disable the
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* remaining ones.
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*/
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status =
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acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
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gpe_register_info);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_disable_all_gpes
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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: Disable and clear all GPEs in all GPE blocks
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*
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******************************************************************************/
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acpi_status acpi_hw_disable_all_gpes(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
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status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
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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_hw_enable_all_runtime_gpes
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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: Enable all "runtime" GPEs, in all GPE blocks
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*
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******************************************************************************/
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acpi_status acpi_hw_enable_all_runtime_gpes(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
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status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL);
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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_hw_enable_all_wakeup_gpes
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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: Enable all "wakeup" GPEs, in all GPE blocks
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*
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******************************************************************************/
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acpi_status acpi_hw_enable_all_wakeup_gpes(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
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status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
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return_ACPI_STATUS(status);
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}
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#endif /* !ACPI_REDUCED_HARDWARE */
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