--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "actables.h"
+
+#define _COMPONENT ACPI_EVENTS
+ACPI_MODULE_NAME("evxfevnt")
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_enable
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Transfers the system into ACPI mode.
+ *
+ ******************************************************************************/
+acpi_status acpi_enable(void)
+{
+ acpi_status status;
+ int retry;
+
+ ACPI_FUNCTION_TRACE(acpi_enable);
+
+ /* ACPI tables must be present */
+
+ if (!acpi_tb_tables_loaded()) {
+ return_ACPI_STATUS(AE_NO_ACPI_TABLES);
+ }
+
+ /* If the Hardware Reduced flag is set, machine is always in acpi mode */
+
+ if (acpi_gbl_reduced_hardware) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Check current mode */
+
+ if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+ "System is already in ACPI mode\n"));
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Transition to ACPI mode */
+
+ status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO,
+ "Could not transition to ACPI mode"));
+ return_ACPI_STATUS(status);
+ }
+
+ /* Sanity check that transition succeeded */
+
+ for (retry = 0; retry < 30000; ++retry) {
+ if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+ if (retry != 0)
+ ACPI_WARNING((AE_INFO,
+ "Platform took > %d00 usec to enter ACPI mode", retry));
+ return_ACPI_STATUS(AE_OK);
+ }
+ acpi_os_stall(100); /* 100 usec */
+ }
+
+ ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
+ return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_enable)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_disable
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
+ *
+ ******************************************************************************/
+acpi_status acpi_disable(void)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE(acpi_disable);
+
+ /* If the Hardware Reduced flag is set, machine is always in acpi mode */
+
+ if (acpi_gbl_reduced_hardware) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+ "System is already in legacy (non-ACPI) mode\n"));
+ } else {
+ /* Transition to LEGACY mode */
+
+ status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY);
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO,
+ "Could not exit ACPI mode to legacy mode"));
+ return_ACPI_STATUS(status);
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n"));
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_disable)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_enable_event
+ *
+ * PARAMETERS: event - The fixed eventto be enabled
+ * flags - Reserved
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Enable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+acpi_status acpi_enable_event(u32 event, u32 flags)
+{
+ acpi_status status = AE_OK;
+ u32 value;
+
+ ACPI_FUNCTION_TRACE(acpi_enable_event);
+
+ /* Decode the Fixed Event */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Enable the requested fixed event (by writing a one to the enable
+ * register bit)
+ */
+ status =
+ acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, ACPI_ENABLE_EVENT);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Make sure that the hardware responded */
+
+ status =
+ acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, &value);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (value != 1) {
+ ACPI_ERROR((AE_INFO,
+ "Could not enable %s event",
+ acpi_ut_get_event_name(event)));
+ return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_enable_event)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_disable_event
+ *
+ * PARAMETERS: event - The fixed event to be disabled
+ * flags - Reserved
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+acpi_status acpi_disable_event(u32 event, u32 flags)
+{
+ acpi_status status = AE_OK;
+ u32 value;
+
+ ACPI_FUNCTION_TRACE(acpi_disable_event);
+
+ /* Decode the Fixed Event */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Disable the requested fixed event (by writing a zero to the enable
+ * register bit)
+ */
+ status =
+ acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, ACPI_DISABLE_EVENT);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ status =
+ acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, &value);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (value != 0) {
+ ACPI_ERROR((AE_INFO,
+ "Could not disable %s events",
+ acpi_ut_get_event_name(event)));
+ return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_disable_event)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_clear_event
+ *
+ * PARAMETERS: event - The fixed event to be cleared
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Clear an ACPI event (fixed)
+ *
+ ******************************************************************************/
+acpi_status acpi_clear_event(u32 event)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE(acpi_clear_event);
+
+ /* Decode the Fixed Event */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Clear the requested fixed event (By writing a one to the status
+ * register bit)
+ */
+ status =
+ acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
+ status_register_id, ACPI_CLEAR_STATUS);
+
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_clear_event)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_event_status
+ *
+ * PARAMETERS: event - The fixed event
+ * event_status - Where the current status of the event will
+ * be returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Obtains and returns the current status of the event
+ *
+ ******************************************************************************/
+acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
+{
+ acpi_status status;
+ acpi_event_status local_event_status = 0;
+ u32 in_byte;
+
+ ACPI_FUNCTION_TRACE(acpi_get_event_status);
+
+ if (!event_status) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /* Decode the Fixed Event */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /* Fixed event currently can be dispatched? */
+
+ if (acpi_gbl_fixed_event_handlers[event].handler) {
+ local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
+ }
+
+ /* Fixed event currently enabled? */
+
+ status =
+ acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
+ enable_register_id, &in_byte);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (in_byte) {
+ local_event_status |=
+ (ACPI_EVENT_FLAG_ENABLED | ACPI_EVENT_FLAG_ENABLE_SET);
+ }
+
+ /* Fixed event currently active? */
+
+ status =
+ acpi_read_bit_register(acpi_gbl_fixed_event_info[event].
+ status_register_id, &in_byte);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (in_byte) {
+ local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
+ }
+
+ (*event_status) = local_event_status;
+ return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_event_status)
+#endif /* !ACPI_REDUCED_HARDWARE */
Code Review / kvmfornfv.git / blobdiff