diff options
Diffstat (limited to 'drivers/acpi/acpica/evxfgpe.c')
| -rw-r--r-- | drivers/acpi/acpica/evxfgpe.c | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c new file mode 100644 index 00000000000..8068065d90e --- /dev/null +++ b/drivers/acpi/acpica/evxfgpe.c @@ -0,0 +1,610 @@ +/****************************************************************************** + * + * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) + * + *****************************************************************************/ + +/* + * 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" + +#define _COMPONENT ACPI_EVENTS +ACPI_MODULE_NAME("evxfgpe") + +/****************************************************************************** + * + * FUNCTION: acpi_update_gpes + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Enable all GPEs that have associated _Lxx or _Exx methods and + * are not pointed to by any device _PRW methods indicating that + * these GPEs are generally intended for system or device wakeup + * (such GPEs have to be enabled directly when the devices whose + * _PRW methods point to them are set up for wakeup signaling). + * + ******************************************************************************/ + +acpi_status acpi_update_gpes(void) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_update_gpes); + + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } else if (acpi_all_gpes_initialized) { + goto unlock; + } + + status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL); + if (ACPI_SUCCESS(status)) { + acpi_all_gpes_initialized = TRUE; + } + +unlock: + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * 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_BAD_PARAMETER; + 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 = acpi_raw_enable_gpe(gpe_event_info); + } + + 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_BAD_PARAMETER; + 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 = acpi_raw_disable_gpe(gpe_event_info) ; + } + + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + return_ACPI_STATUS(status); +} +ACPI_EXPORT_SYMBOL(acpi_disable_gpe) + +/******************************************************************************* + * + * FUNCTION: acpi_gpe_can_wake + * + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 + * gpe_number - GPE level within the GPE block + * + * RETURN: Status + * + * DESCRIPTION: Set the ACPI_GPE_CAN_WAKE flag for the given GPE. If the GPE + * has a corresponding method and is currently enabled, disable it + * (GPEs with corresponding methods are enabled unconditionally + * during initialization, but GPEs that can wake up are expected + * to be initially disabled). + * + ******************************************************************************/ +acpi_status acpi_gpe_can_wake(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_gpe_can_wake); + + 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) { + gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; + } else { + status = AE_BAD_PARAMETER; + } + + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + return_ACPI_STATUS(status); +} +ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake) + +/******************************************************************************* + * + * 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 || !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { + 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_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_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_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); +} + +/******************************************************************************* + * + * 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 = AE_OK; + 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; + + 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) |