1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
445 lines
12 KiB
C
445 lines
12 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 - 2005, R. Byron Moore
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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 <acpi/acevents.h>
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwgpe")
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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 (
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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_hw_low_level_write (8, 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
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acpi_hw_clear_gpe (
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struct acpi_gpe_event_info *gpe_event_info)
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{
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acpi_status status;
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ACPI_FUNCTION_ENTRY ();
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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_hw_low_level_write (8, gpe_event_info->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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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_hw_get_gpe_status (
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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 = gpe_event_info->register_bit;
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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_hw_low_level_read (8, &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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#endif /* ACPI_FUTURE_USAGE */
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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 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 (
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struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block)
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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 = acpi_hw_low_level_write (8, 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 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 (
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struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block)
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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 = acpi_hw_low_level_write (8, 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 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 (
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struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block)
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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_hw_low_level_write (8, gpe_block->register_info[i].enable_for_run,
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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_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 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_wakeup_gpe_block (
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struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block)
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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_hw_low_level_write (8, gpe_block->register_info[i].enable_for_wake,
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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_disable_all_gpes
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*
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* PARAMETERS: Flags - ACPI_NOT_ISR or ACPI_ISR
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disable and clear all GPEs
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*
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******************************************************************************/
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acpi_status
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acpi_hw_disable_all_gpes (
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u32 flags)
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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, flags);
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status = acpi_ev_walk_gpe_list (acpi_hw_clear_gpe_block, flags);
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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: Flags - ACPI_NOT_ISR or ACPI_ISR
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all GPEs of the given type
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*
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******************************************************************************/
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acpi_status
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acpi_hw_enable_all_runtime_gpes (
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u32 flags)
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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, flags);
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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: Flags - ACPI_NOT_ISR or ACPI_ISR
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable all GPEs of the given type
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*
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******************************************************************************/
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acpi_status
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acpi_hw_enable_all_wakeup_gpes (
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u32 flags)
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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, flags);
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return_ACPI_STATUS (status);
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}
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