Orange Pi5 kernel

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: evevent - Fixed Event handling and dispatch
 *
 * Copyright (C) 2000 - 2020, Intel Corp.
 *
 *****************************************************************************/
 
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
 
#define _COMPONENT          ACPI_EVENTS
ACPI_MODULE_NAME("evevent")
#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
/* Local prototypes */
static acpi_status acpi_ev_fixed_event_initialize(void);
 
static u32 acpi_ev_fixed_event_dispatch(u32 event);
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_initialize_events
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
 *
 ******************************************************************************/
 
acpi_status acpi_ev_initialize_events(void)
{
<------>acpi_status status;
 
<------>ACPI_FUNCTION_TRACE(ev_initialize_events);
 
<------>/* If Hardware Reduced flag is set, there are no fixed events */
 
<------>if (acpi_gbl_reduced_hardware) {
<------><------>return_ACPI_STATUS(AE_OK);
<------>}
 
<------>/*
<------> * Initialize the Fixed and General Purpose Events. This is done prior to
<------> * enabling SCIs to prevent interrupts from occurring before the handlers
<------> * are installed.
<------> */
<------>status = acpi_ev_fixed_event_initialize();
<------>if (ACPI_FAILURE(status)) {
<------><------>ACPI_EXCEPTION((AE_INFO, status,
<------><------><------><------>"Unable to initialize fixed events"));
<------><------>return_ACPI_STATUS(status);
<------>}
 
<------>status = acpi_ev_gpe_initialize();
<------>if (ACPI_FAILURE(status)) {
<------><------>ACPI_EXCEPTION((AE_INFO, status,
<------><------><------><------>"Unable to initialize general purpose events"));
<------><------>return_ACPI_STATUS(status);
<------>}
 
<------>return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_install_xrupt_handlers
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
 *
 ******************************************************************************/
 
acpi_status acpi_ev_install_xrupt_handlers(void)
{
<------>acpi_status status;
 
<------>ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
 
<------>/* If Hardware Reduced flag is set, there is no ACPI h/w */
 
<------>if (acpi_gbl_reduced_hardware) {
<------><------>return_ACPI_STATUS(AE_OK);
<------>}
 
<------>/* Install the SCI handler */
 
<------>status = acpi_ev_install_sci_handler();
<------>if (ACPI_FAILURE(status)) {
<------><------>ACPI_EXCEPTION((AE_INFO, status,
<------><------><------><------>"Unable to install System Control Interrupt handler"));
<------><------>return_ACPI_STATUS(status);
<------>}
 
<------>/* Install the handler for the Global Lock */
 
<------>status = acpi_ev_init_global_lock_handler();
<------>if (ACPI_FAILURE(status)) {
<------><------>ACPI_EXCEPTION((AE_INFO, status,
<------><------><------><------>"Unable to initialize Global Lock handler"));
<------><------>return_ACPI_STATUS(status);
<------>}
 
<------>acpi_gbl_events_initialized = TRUE;
<------>return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_fixed_event_initialize
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
 *
 ******************************************************************************/
 
static acpi_status acpi_ev_fixed_event_initialize(void)
{
<------>u32 i;
<------>acpi_status status;
 
<------>/*
<------> * Initialize the structure that keeps track of fixed event handlers and
<------> * disable all of the fixed events.
<------> */
<------>for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
<------><------>acpi_gbl_fixed_event_handlers[i].handler = NULL;
<------><------>acpi_gbl_fixed_event_handlers[i].context = NULL;
 
<------><------>/* Disable the fixed event */
 
<------><------>if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
<------><------><------>status =
<------><------><------>    acpi_write_bit_register(acpi_gbl_fixed_event_info
<------><------><------><------><------><------>    [i].enable_register_id,
<------><------><------><------><------><------>    ACPI_DISABLE_EVENT);
<------><------><------>if (ACPI_FAILURE(status)) {
<------><------><------><------>return (status);
<------><------><------>}
<------><------>}
<------>}
 
<------>return (AE_OK);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_fixed_event_detect
 *
 * PARAMETERS:  None
 *
 * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
 *
 * DESCRIPTION: Checks the PM status register for active fixed events
 *
 ******************************************************************************/
 
u32 acpi_ev_fixed_event_detect(void)
{
<------>u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
<------>u32 fixed_status;
<------>u32 fixed_enable;
<------>u32 i;
<------>acpi_status status;
 
<------>ACPI_FUNCTION_NAME(ev_fixed_event_detect);
 
<------>/*
<------> * Read the fixed feature status and enable registers, as all the cases
<------> * depend on their values. Ignore errors here.
<------> */
<------>status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
<------>status |=
<------>    acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
<------>if (ACPI_FAILURE(status)) {
<------><------>return (int_status);
<------>}
 
<------>ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
<------><------><------>  "Fixed Event Block: Enable %08X Status %08X\n",
<------><------><------>  fixed_enable, fixed_status));
 
<------>/*
<------> * Check for all possible Fixed Events and dispatch those that are active
<------> */
<------>for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
 
<------><------>/* Both the status and enable bits must be on for this event */
 
<------><------>if ((fixed_status & acpi_gbl_fixed_event_info[i].
<------><------>     status_bit_mask)
<------><------>    && (fixed_enable & acpi_gbl_fixed_event_info[i].
<------><------><------>enable_bit_mask)) {
<------><------><------>/*
<------><------><------> * Found an active (signalled) event. Invoke global event
<------><------><------> * handler if present.
<------><------><------> */
<------><------><------>acpi_fixed_event_count[i]++;
<------><------><------>if (acpi_gbl_global_event_handler) {
<------><------><------><------>acpi_gbl_global_event_handler
<------><------><------><------>    (ACPI_EVENT_TYPE_FIXED, NULL, i,
<------><------><------><------>     acpi_gbl_global_event_handler_context);
<------><------><------>}
 
<------><------><------>int_status |= acpi_ev_fixed_event_dispatch(i);
<------><------>}
<------>}
 
<------>return (int_status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_fixed_event_dispatch
 *
 * PARAMETERS:  event               - Event type
 *
 * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
 *
 * DESCRIPTION: Clears the status bit for the requested event, calls the
 *              handler that previously registered for the event.
 *              NOTE: If there is no handler for the event, the event is
 *              disabled to prevent further interrupts.
 *
 ******************************************************************************/
 
static u32 acpi_ev_fixed_event_dispatch(u32 event)
{
 
<------>ACPI_FUNCTION_ENTRY();
 
<------>/* Clear the status bit */
 
<------>(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
<------><------><------><------>      status_register_id, ACPI_CLEAR_STATUS);
 
<------>/*
<------> * Make sure that a handler exists. If not, report an error
<------> * and disable the event to prevent further interrupts.
<------> */
<------>if (!acpi_gbl_fixed_event_handlers[event].handler) {
<------><------>(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
<------><------><------><------><------>      enable_register_id,
<------><------><------><------><------>      ACPI_DISABLE_EVENT);
 
<------><------>ACPI_ERROR((AE_INFO,
<------><------><------>    "No installed handler for fixed event - %s (%u), disabling",
<------><------><------>    acpi_ut_get_event_name(event), event));
 
<------><------>return (ACPI_INTERRUPT_NOT_HANDLED);
<------>}
 
<------>/* Invoke the Fixed Event handler */
 
<------>return ((acpi_gbl_fixed_event_handlers[event].
<------><------> handler) (acpi_gbl_fixed_event_handlers[event].context));
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_any_fixed_event_status_set
 *
 * PARAMETERS:  None
 *
 * RETURN:      TRUE or FALSE
 *
 * DESCRIPTION: Checks the PM status register for active fixed events
 *
 ******************************************************************************/
 
u32 acpi_any_fixed_event_status_set(void)
{
<------>acpi_status status;
<------>u32 in_status;
<------>u32 in_enable;
<------>u32 i;
 
<------>status = acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &in_enable);
<------>if (ACPI_FAILURE(status)) {
<------><------>return (FALSE);
<------>}
 
<------>status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &in_status);
<------>if (ACPI_FAILURE(status)) {
<------><------>return (FALSE);
<------>}
 
<------>/*
<------> * Check for all possible Fixed Events and dispatch those that are active
<------> */
<------>for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
 
<------><------>/* Both the status and enable bits must be on for this event */
 
<------><------>if ((in_status & acpi_gbl_fixed_event_info[i].status_bit_mask) &&
<------><------>    (in_enable & acpi_gbl_fixed_event_info[i].enable_bit_mask)) {
<------><------><------>return (TRUE);
<------><------>}
<------>}
 
<------>return (FALSE);
}
 
#endif				/* !ACPI_REDUCED_HARDWARE */