470 lines
13 KiB
C
470 lines
13 KiB
C
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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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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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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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/* 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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/******************************************************************************
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*
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* FUNCTION: acpi_hw_low_disable_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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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable a single GPE in the enable register.
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*
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******************************************************************************/
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acpi_status acpi_hw_low_disable_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 enable_mask;
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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_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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/* Clear just the bit that corresponds to this GPE */
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ACPI_CLEAR_BIT(enable_mask,
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((u32) 1 <<
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(gpe_event_info->gpe_number -
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gpe_register_info->base_gpe_number)));
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/* Write the updated enable mask */
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status = acpi_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_write_gpe_enable_reg
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*
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* PARAMETERS: gpe_event_info - Info block for the GPE to be enabled
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must
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* already be cleared or set in the parent register
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* enable_for_run mask.
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*
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******************************************************************************/
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acpi_status
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acpi_hw_write_gpe_enable_reg(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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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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/* Write the entire GPE (runtime) enable register */
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status = acpi_write(gpe_register_info->enable_for_run,
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&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_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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acpi_status status;
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u8 register_bit;
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ACPI_FUNCTION_ENTRY();
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register_bit = (u8)
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(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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* 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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status = acpi_write(register_bit,
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&gpe_event_info->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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u32 in_byte;
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u8 register_bit;
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struct acpi_gpe_register_info *gpe_register_info;
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acpi_status status;
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acpi_event_status local_event_status = 0;
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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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/* 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 = (u8)
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(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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/* 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 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 active (status bit == 1)? */
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status = acpi_read(&in_byte, &gpe_register_info->status_address);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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if (register_bit & in_byte) {
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local_event_status |= ACPI_EVENT_FLAG_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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unlock_and_exit:
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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_write(0x00,
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&gpe_block->register_info[i].enable_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_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_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, void *context)
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{
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u32 i;
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acpi_status status;
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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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if (!gpe_block->register_info[i].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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status = acpi_write(gpe_block->register_info[i].enable_for_run,
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&gpe_block->register_info[i].
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enable_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_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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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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if (!gpe_block->register_info[i].enable_for_wake) {
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continue;
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}
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/* Enable all "wake" GPEs in this register */
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status = acpi_write(gpe_block->register_info[i].enable_for_wake,
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&gpe_block->register_info[i].
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enable_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_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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status = acpi_ev_walk_gpe_list(acpi_hw_clear_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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