| /****************************************************************************** |
| * |
| * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2010, 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. |
| */ |
| |
| #include <acpi/acpi.h> |
| #include "accommon.h" |
| #include "acevents.h" |
| #include "acnamesp.h" |
| #include "actables.h" |
| |
| #define _COMPONENT ACPI_EVENTS |
| ACPI_MODULE_NAME("evxfevnt") |
| |
| /* Local prototypes */ |
| static acpi_status |
| acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| struct acpi_gpe_block_info *gpe_block, void *context); |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_enable |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Transfers the system into ACPI mode. |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_enable(void) |
| { |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(acpi_enable); |
| |
| /* ACPI tables must be present */ |
| |
| if (!acpi_tb_tables_loaded()) { |
| return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
| } |
| |
| /* 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 */ |
| |
| if (acpi_hw_get_mode() != ACPI_SYS_MODE_ACPI) { |
| ACPI_ERROR((AE_INFO, |
| "Hardware did not enter ACPI mode")); |
| return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| "Transition to ACPI mode successful\n")); |
| |
| return_ACPI_STATUS(AE_OK); |
| } |
| |
| 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 (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_clear_and_enable_gpe |
| * |
| * PARAMETERS: gpe_event_info - GPE to enable |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Clear the given GPE from stale events and enable it. |
| * |
| ******************************************************************************/ |
| static acpi_status |
| acpi_clear_and_enable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
| { |
| acpi_status status; |
| |
| /* |
| * We will only allow a GPE to be enabled if it has either an |
| * associated method (_Lxx/_Exx) or a handler. Otherwise, the |
| * GPE will be immediately disabled by acpi_ev_gpe_dispatch the |
| * first time it fires. |
| */ |
| if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)) { |
| return_ACPI_STATUS(AE_NO_HANDLER); |
| } |
| |
| /* Clear the GPE (of stale events) */ |
| status = acpi_hw_clear_gpe(gpe_event_info); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| |
| /* Enable the requested GPE */ |
| status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_set_gpe |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Enable or disable an individual GPE. This function bypasses |
| * the reference count mechanism used in the acpi_enable_gpe and |
| * acpi_disable_gpe interfaces -- and should be used with care. |
| * |
| * Note: Typically used to disable a runtime GPE for short period of time, |
| * then re-enable it, without disturbing the existing reference counts. This |
| * is useful, for example, in the Embedded Controller (EC) driver. |
| * |
| ******************************************************************************/ |
| acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action) |
| { |
| struct acpi_gpe_event_info *gpe_event_info; |
| acpi_status status; |
| acpi_cpu_flags flags; |
| |
| ACPI_FUNCTION_TRACE(acpi_set_gpe); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| /* Perform the action */ |
| |
| switch (action) { |
| case ACPI_GPE_ENABLE: |
| status = acpi_clear_and_enable_gpe(gpe_event_info); |
| break; |
| |
| case ACPI_GPE_DISABLE: |
| status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); |
| break; |
| |
| default: |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_set_gpe) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_gpe_wakeup |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * Action - Enable or Disable |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. |
| * |
| ******************************************************************************/ |
| acpi_status acpi_gpe_wakeup(acpi_handle gpe_device, u32 gpe_number, u8 action) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_gpe_event_info *gpe_event_info; |
| struct acpi_gpe_register_info *gpe_register_info; |
| acpi_cpu_flags flags; |
| u32 register_bit; |
| |
| ACPI_FUNCTION_TRACE(acpi_gpe_wakeup); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| gpe_register_info = gpe_event_info->register_info; |
| if (!gpe_register_info) { |
| status = AE_NOT_EXIST; |
| goto unlock_and_exit; |
| } |
| |
| register_bit = |
| acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info); |
| |
| /* Perform the action */ |
| |
| switch (action) { |
| case ACPI_GPE_ENABLE: |
| ACPI_SET_BIT(gpe_register_info->enable_for_wake, |
| (u8)register_bit); |
| break; |
| |
| case ACPI_GPE_DISABLE: |
| ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
| (u8)register_bit); |
| break; |
| |
| default: |
| ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_gpe_wakeup) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_enable_gpe |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is |
| * hardware-enabled. |
| * |
| ******************************************************************************/ |
| acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_gpe_event_info *gpe_event_info; |
| acpi_cpu_flags flags; |
| |
| ACPI_FUNCTION_TRACE(acpi_enable_gpe); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) { |
| status = AE_LIMIT; /* Too many references */ |
| goto unlock_and_exit; |
| } |
| |
| gpe_event_info->runtime_count++; |
| if (gpe_event_info->runtime_count == 1) { |
| status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
| if (ACPI_SUCCESS(status)) { |
| status = acpi_clear_and_enable_gpe(gpe_event_info); |
| } |
| if (ACPI_FAILURE(status)) { |
| gpe_event_info->runtime_count--; |
| } |
| } |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| ACPI_EXPORT_SYMBOL(acpi_enable_gpe) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_disable_gpe |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a reference to a GPE. When the last reference is |
| * removed, only then is the GPE disabled (for runtime GPEs), or |
| * the GPE mask bit disabled (for wake GPEs) |
| * |
| ******************************************************************************/ |
| acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_gpe_event_info *gpe_event_info; |
| acpi_cpu_flags flags; |
| |
| ACPI_FUNCTION_TRACE(acpi_disable_gpe); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| /* Hardware-disable a runtime GPE on removal of the last reference */ |
| |
| if (!gpe_event_info->runtime_count) { |
| status = AE_LIMIT; /* There are no references to remove */ |
| goto unlock_and_exit; |
| } |
| |
| gpe_event_info->runtime_count--; |
| if (!gpe_event_info->runtime_count) { |
| status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
| if (ACPI_SUCCESS(status)) { |
| status = |
| acpi_hw_low_set_gpe(gpe_event_info, |
| ACPI_GPE_DISABLE); |
| } |
| if (ACPI_FAILURE(status)) { |
| gpe_event_info->runtime_count++; |
| } |
| } |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_disable_event |
| * |
| * PARAMETERS: Event - The fixed eventto be enabled |
| * 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_clear_gpe |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Clear an ACPI event (general purpose) |
| * |
| ******************************************************************************/ |
| acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_gpe_event_info *gpe_event_info; |
| acpi_cpu_flags flags; |
| |
| ACPI_FUNCTION_TRACE(acpi_clear_gpe); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| status = acpi_hw_clear_gpe(gpe_event_info); |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_clear_gpe) |
| /******************************************************************************* |
| * |
| * 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 = AE_OK; |
| u32 value; |
| |
| 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); |
| } |
| |
| /* Get the status of the requested fixed event */ |
| |
| status = |
| acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
| enable_register_id, &value); |
| if (ACPI_FAILURE(status)) |
| return_ACPI_STATUS(status); |
| |
| *event_status = value; |
| |
| status = |
| acpi_read_bit_register(acpi_gbl_fixed_event_info[event]. |
| status_register_id, &value); |
| if (ACPI_FAILURE(status)) |
| return_ACPI_STATUS(status); |
| |
| if (value) |
| *event_status |= ACPI_EVENT_FLAG_SET; |
| |
| if (acpi_gbl_fixed_event_handlers[event].handler) |
| *event_status |= ACPI_EVENT_FLAG_HANDLE; |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_get_gpe_status |
| * |
| * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 |
| * gpe_number - GPE level within the GPE block |
| * event_status - Where the current status of the event will |
| * be returned |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Get status of an event (general purpose) |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_get_gpe_status(acpi_handle gpe_device, |
| u32 gpe_number, acpi_event_status *event_status) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_gpe_event_info *gpe_event_info; |
| acpi_cpu_flags flags; |
| |
| ACPI_FUNCTION_TRACE(acpi_get_gpe_status); |
| |
| flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| |
| /* Ensure that we have a valid GPE number */ |
| |
| gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| if (!gpe_event_info) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| /* Obtain status on the requested GPE number */ |
| |
| status = acpi_hw_get_gpe_status(gpe_event_info, event_status); |
| |
| if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) |
| *event_status |= ACPI_EVENT_FLAG_HANDLE; |
| |
| unlock_and_exit: |
| acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_install_gpe_block |
| * |
| * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| * gpe_block_address - Address and space_iD |
| * register_count - Number of GPE register pairs in the block |
| * interrupt_number - H/W interrupt for the block |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Create and Install a block of GPE registers |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_install_gpe_block(acpi_handle gpe_device, |
| struct acpi_generic_address *gpe_block_address, |
| u32 register_count, u32 interrupt_number) |
| { |
| acpi_status status; |
| union acpi_operand_object *obj_desc; |
| struct acpi_namespace_node *node; |
| struct acpi_gpe_block_info *gpe_block; |
| |
| ACPI_FUNCTION_TRACE(acpi_install_gpe_block); |
| |
| if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { |
| return_ACPI_STATUS(AE_BAD_PARAMETER); |
| } |
| |
| status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| node = acpi_ns_validate_handle(gpe_device); |
| if (!node) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| /* |
| * For user-installed GPE Block Devices, the gpe_block_base_number |
| * is always zero |
| */ |
| status = |
| acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, |
| interrupt_number, &gpe_block); |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| |
| /* Install block in the device_object attached to the node */ |
| |
| obj_desc = acpi_ns_get_attached_object(node); |
| if (!obj_desc) { |
| |
| /* |
| * No object, create a new one (Device nodes do not always have |
| * an attached object) |
| */ |
| obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); |
| if (!obj_desc) { |
| status = AE_NO_MEMORY; |
| goto unlock_and_exit; |
| } |
| |
| status = |
| acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); |
| |
| /* Remove local reference to the object */ |
| |
| acpi_ut_remove_reference(obj_desc); |
| |
| if (ACPI_FAILURE(status)) { |
| goto unlock_and_exit; |
| } |
| } |
| |
| /* Now install the GPE block in the device_object */ |
| |
| obj_desc->device.gpe_block = gpe_block; |
| |
| /* Run the _PRW methods and enable the runtime GPEs in the new block */ |
| |
| status = acpi_ev_initialize_gpe_block(node, gpe_block); |
| |
| unlock_and_exit: |
| (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_remove_gpe_block |
| * |
| * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Remove a previously installed block of GPE registers |
| * |
| ******************************************************************************/ |
| acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) |
| { |
| union acpi_operand_object *obj_desc; |
| acpi_status status; |
| struct acpi_namespace_node *node; |
| |
| ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); |
| |
| if (!gpe_device) { |
| return_ACPI_STATUS(AE_BAD_PARAMETER); |
| } |
| |
| status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| node = acpi_ns_validate_handle(gpe_device); |
| if (!node) { |
| status = AE_BAD_PARAMETER; |
| goto unlock_and_exit; |
| } |
| |
| /* Get the device_object attached to the node */ |
| |
| obj_desc = acpi_ns_get_attached_object(node); |
| if (!obj_desc || !obj_desc->device.gpe_block) { |
| return_ACPI_STATUS(AE_NULL_OBJECT); |
| } |
| |
| /* Delete the GPE block (but not the device_object) */ |
| |
| status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); |
| if (ACPI_SUCCESS(status)) { |
| obj_desc->device.gpe_block = NULL; |
| } |
| |
| unlock_and_exit: |
| (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| return_ACPI_STATUS(status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_get_gpe_device |
| * |
| * PARAMETERS: Index - System GPE index (0-current_gpe_count) |
| * gpe_device - Where the parent GPE Device is returned |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL |
| * gpe device indicates that the gpe number is contained in one of |
| * the FADT-defined gpe blocks. Otherwise, the GPE block device. |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) |
| { |
| struct acpi_gpe_device_info info; |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(acpi_get_gpe_device); |
| |
| if (!gpe_device) { |
| return_ACPI_STATUS(AE_BAD_PARAMETER); |
| } |
| |
| if (index >= acpi_current_gpe_count) { |
| return_ACPI_STATUS(AE_NOT_EXIST); |
| } |
| |
| /* Setup and walk the GPE list */ |
| |
| info.index = index; |
| info.status = AE_NOT_EXIST; |
| info.gpe_device = NULL; |
| info.next_block_base_index = 0; |
| |
| status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| |
| *gpe_device = info.gpe_device; |
| return_ACPI_STATUS(info.status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ev_get_gpe_device |
| * |
| * PARAMETERS: GPE_WALK_CALLBACK |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE |
| * block device. NULL if the GPE is one of the FADT-defined GPEs. |
| * |
| ******************************************************************************/ |
| static acpi_status |
| acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| struct acpi_gpe_block_info *gpe_block, void *context) |
| { |
| struct acpi_gpe_device_info *info = context; |
| |
| /* Increment Index by the number of GPEs in this block */ |
| |
| info->next_block_base_index += gpe_block->gpe_count; |
| |
| if (info->index < info->next_block_base_index) { |
| /* |
| * The GPE index is within this block, get the node. Leave the node |
| * NULL for the FADT-defined GPEs |
| */ |
| if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) { |
| info->gpe_device = gpe_block->node; |
| } |
| |
| info->status = AE_OK; |
| return (AE_CTRL_END); |
| } |
| |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_disable_all_gpes |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_disable_all_gpes(void) |
| { |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); |
| |
| status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| |
| status = acpi_hw_disable_all_gpes(); |
| (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_enable_all_runtime_gpes |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_enable_all_runtime_gpes(void) |
| { |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes); |
| |
| status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| |
| status = acpi_hw_enable_all_runtime_gpes(); |
| (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| |
| return_ACPI_STATUS(status); |
| } |