Orange Pi5 kernel

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
 *
 * Module Name: evsci - System Control Interrupt configuration and
 *                      legacy to ACPI mode state transition functions
 *
 ******************************************************************************/
 
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
 
#define _COMPONENT          ACPI_EVENTS
ACPI_MODULE_NAME("evsci")
#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
/* Local prototypes */
static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_sci_dispatch
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status code indicates whether interrupt was handled.
 *
 * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers.
 *
 ******************************************************************************/
 
u32 acpi_ev_sci_dispatch(void)
{
<------>struct acpi_sci_handler_info *sci_handler;
<------>acpi_cpu_flags flags;
<------>u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
 
<------>ACPI_FUNCTION_NAME(ev_sci_dispatch);
 
<------>/* Are there any host-installed SCI handlers? */
 
<------>if (!acpi_gbl_sci_handler_list) {
<------><------>return (int_status);
<------>}
 
<------>flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
<------>/* Invoke all host-installed SCI handlers */
 
<------>sci_handler = acpi_gbl_sci_handler_list;
<------>while (sci_handler) {
 
<------><------>/* Invoke the installed handler (at interrupt level) */
 
<------><------>int_status |= sci_handler->address(sci_handler->context);
 
<------><------>sci_handler = sci_handler->next;
<------>}
 
<------>acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
<------>return (int_status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_sci_xrupt_handler
 *
 * PARAMETERS:  context   - Calling Context
 *
 * RETURN:      Status code indicates whether interrupt was handled.
 *
 * DESCRIPTION: Interrupt handler that will figure out what function or
 *              control method to call to deal with a SCI.
 *
 ******************************************************************************/
 
static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
{
<------>struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
<------>u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
 
<------>ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
 
<------>/*
<------> * We are guaranteed by the ACPICA initialization/shutdown code that
<------> * if this interrupt handler is installed, ACPI is enabled.
<------> */
 
<------>/*
<------> * Fixed Events:
<------> * Check for and dispatch any Fixed Events that have occurred
<------> */
<------>interrupt_handled |= acpi_ev_fixed_event_detect();
 
<------>/*
<------> * General Purpose Events:
<------> * Check for and dispatch any GPEs that have occurred
<------> */
<------>interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
 
<------>/* Invoke all host-installed SCI handlers */
 
<------>interrupt_handled |= acpi_ev_sci_dispatch();
 
<------>acpi_sci_count++;
<------>return_UINT32(interrupt_handled);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_gpe_xrupt_handler
 *
 * PARAMETERS:  context   - Calling Context
 *
 * RETURN:      Status code indicates whether interrupt was handled.
 *
 * DESCRIPTION: Handler for GPE Block Device interrupts
 *
 ******************************************************************************/
 
u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
{
<------>struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
<------>u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
 
<------>ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
 
<------>/*
<------> * We are guaranteed by the ACPICA initialization/shutdown code that
<------> * if this interrupt handler is installed, ACPI is enabled.
<------> */
 
<------>/* GPEs: Check for and dispatch any GPEs that have occurred */
 
<------>interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
<------>return_UINT32(interrupt_handled);
}
 
/******************************************************************************
 *
 * FUNCTION:    acpi_ev_install_sci_handler
 *
 * PARAMETERS:  none
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Installs SCI handler.
 *
 ******************************************************************************/
 
u32 acpi_ev_install_sci_handler(void)
{
<------>u32 status = AE_OK;
 
<------>ACPI_FUNCTION_TRACE(ev_install_sci_handler);
 
<------>status =
<------>    acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
<------><------><------><------><------>      acpi_ev_sci_xrupt_handler,
<------><------><------><------><------>      acpi_gbl_gpe_xrupt_list_head);
<------>return_ACPI_STATUS(status);
}
 
/******************************************************************************
 *
 * FUNCTION:    acpi_ev_remove_all_sci_handlers
 *
 * PARAMETERS:  none
 *
 * RETURN:      AE_OK if handler uninstalled, AE_ERROR if handler was not
 *              installed to begin with
 *
 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
 *              taken. Remove all host-installed SCI handlers.
 *
 * Note:  It doesn't seem important to disable all events or set the event
 *        enable registers to their original values. The OS should disable
 *        the SCI interrupt level when the handler is removed, so no more
 *        events will come in.
 *
 ******************************************************************************/
 
acpi_status acpi_ev_remove_all_sci_handlers(void)
{
<------>struct acpi_sci_handler_info *sci_handler;
<------>acpi_cpu_flags flags;
<------>acpi_status status;
 
<------>ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers);
 
<------>/* Just let the OS remove the handler and disable the level */
 
<------>status =
<------>    acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
<------><------><------><------><------>     acpi_ev_sci_xrupt_handler);
 
<------>if (!acpi_gbl_sci_handler_list) {
<------><------>return (status);
<------>}
 
<------>flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
<------>/* Free all host-installed SCI handlers */
 
<------>while (acpi_gbl_sci_handler_list) {
<------><------>sci_handler = acpi_gbl_sci_handler_list;
<------><------>acpi_gbl_sci_handler_list = sci_handler->next;
<------><------>ACPI_FREE(sci_handler);
<------>}
 
<------>acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
<------>return_ACPI_STATUS(status);
}
 
#endif				/* !ACPI_REDUCED_HARDWARE */