diff options
Diffstat (limited to 'drivers/acpi/events/evxfevnt.c')
| -rw-r--r-- | drivers/acpi/events/evxfevnt.c | 778 |
1 files changed, 778 insertions, 0 deletions
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c new file mode 100644 index 00000000000..fa8d5f25be6 --- /dev/null +++ b/drivers/acpi/events/evxfevnt.c @@ -0,0 +1,778 @@ +/****************************************************************************** + * + * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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 <linux/module.h> + +#include <acpi/acpi.h> +#include <acpi/acevents.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_EVENTS + ACPI_MODULE_NAME ("evxfevnt") + + +/******************************************************************************* + * + * FUNCTION: acpi_enable + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Transfers the system into ACPI mode. + * + ******************************************************************************/ + +acpi_status +acpi_enable (void) +{ + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE ("acpi_enable"); + + + /* Make sure we have the FADT*/ + + if (!acpi_gbl_FADT) { + ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n")); + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { + ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n")); + } + else { + /* Transition to ACPI mode */ + + status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n")); + return_ACPI_STATUS (status); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Transition to ACPI mode successful\n")); + } + + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_disable + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Transfers the system into LEGACY mode. + * + ******************************************************************************/ + +acpi_status +acpi_disable (void) +{ + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE ("acpi_disable"); + + + if (!acpi_gbl_FADT) { + ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n")); + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + 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_DEBUG_PRINT ((ACPI_DB_ERROR, "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); +} + + +/******************************************************************************* + * + * 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_set_register (acpi_gbl_fixed_event_info[event].enable_register_id, + 1, ACPI_MTX_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Make sure that the hardware responded */ + + status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id, + &value, ACPI_MTX_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + if (value != 1) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Could not enable %s event\n", acpi_ut_get_event_name (event))); + return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); + } + + return_ACPI_STATUS (status); +} +EXPORT_SYMBOL(acpi_enable_event); + + +/******************************************************************************* + * + * FUNCTION: acpi_set_gpe_type + * + * PARAMETERS: gpe_device - Parent GPE Device + * gpe_number - GPE level within the GPE block + * Type - New GPE type + * + * RETURN: Status + * + * DESCRIPTION: Enable an ACPI event (general purpose) + * + ******************************************************************************/ + +acpi_status +acpi_set_gpe_type ( + acpi_handle gpe_device, + u32 gpe_number, + u8 type) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + + + ACPI_FUNCTION_TRACE ("acpi_set_gpe_type"); + + + /* 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->flags & ACPI_GPE_TYPE_MASK) == type) { + return_ACPI_STATUS (AE_OK); + } + + /* Set the new type (will disable GPE if currently enabled) */ + + status = acpi_ev_set_gpe_type (gpe_event_info, type); + +unlock_and_exit: + return_ACPI_STATUS (status); +} +EXPORT_SYMBOL(acpi_set_gpe_type); + + +/******************************************************************************* + * + * FUNCTION: acpi_enable_gpe + * + * PARAMETERS: gpe_device - Parent GPE Device + * gpe_number - GPE level within the GPE block + * Flags - Just enable, or also wake enable? + * Called from ISR or not + * + * RETURN: Status + * + * DESCRIPTION: Enable an ACPI event (general purpose) + * + ******************************************************************************/ + +acpi_status +acpi_enable_gpe ( + acpi_handle gpe_device, + u32 gpe_number, + u32 flags) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + + + ACPI_FUNCTION_TRACE ("acpi_enable_gpe"); + + + /* Use semaphore lock if not executing at interrupt level */ + + if (flags & ACPI_NOT_ISR) { + status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* 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 enable */ + + status = acpi_ev_enable_gpe (gpe_event_info, TRUE); + +unlock_and_exit: + if (flags & ACPI_NOT_ISR) { + (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); + } + return_ACPI_STATUS (status); +} +EXPORT_SYMBOL(acpi_enable_gpe); + + +/******************************************************************************* + * + * FUNCTION: acpi_disable_gpe + * + * PARAMETERS: gpe_device - Parent GPE Device + * gpe_number - GPE level within the GPE block + * Flags - Just disable, or also wake disable? + * Called from ISR or not + * + * RETURN: Status + * + * DESCRIPTION: Disable an ACPI event (general purpose) + * + ******************************************************************************/ + +acpi_status +acpi_disable_gpe ( + acpi_handle gpe_device, + u32 gpe_number, + u32 flags) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + + + ACPI_FUNCTION_TRACE ("acpi_disable_gpe"); + + + /* Use semaphore lock if not executing at interrupt level */ + + if (flags & ACPI_NOT_ISR) { + status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* 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_ev_disable_gpe (gpe_event_info); + +unlock_and_exit: + if (flags & ACPI_NOT_ISR) { + (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); + } + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * 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_set_register (acpi_gbl_fixed_event_info[event].enable_register_id, + 0, ACPI_MTX_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id, + &value, ACPI_MTX_LOCK); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + if (value != 0) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Could not disable %s events\n", acpi_ut_get_event_name (event))); + return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); + } + + return_ACPI_STATUS (status); +} +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_set_register (acpi_gbl_fixed_event_info[event].status_register_id, + 1, ACPI_MTX_LOCK); + + return_ACPI_STATUS (status); +} +EXPORT_SYMBOL(acpi_clear_event); + + +/******************************************************************************* + * + * FUNCTION: acpi_clear_gpe + * + * PARAMETERS: gpe_device - Parent GPE Device + * gpe_number - GPE level within the GPE block + * Flags - Called from an ISR or not + * + * RETURN: Status + * + * DESCRIPTION: Clear an ACPI event (general purpose) + * + ******************************************************************************/ + +acpi_status +acpi_clear_gpe ( + acpi_handle gpe_device, + u32 gpe_number, + u32 flags) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + + + ACPI_FUNCTION_TRACE ("acpi_clear_gpe"); + + + /* Use semaphore lock if not executing at interrupt level */ + + if (flags & ACPI_NOT_ISR) { + status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* 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: + if (flags & ACPI_NOT_ISR) { + (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); + } + return_ACPI_STATUS (status); +} + + +#ifdef ACPI_FUTURE_USAGE + +/******************************************************************************* + * + * 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; + + + 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_get_register (acpi_gbl_fixed_event_info[event].status_register_id, + event_status, ACPI_MTX_LOCK); + + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_get_gpe_status + * + * PARAMETERS: gpe_device - Parent GPE Device + * gpe_number - GPE level within the GPE block + * Flags - Called from an ISR or not + * 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, + u32 flags, + acpi_event_status *event_status) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + + + ACPI_FUNCTION_TRACE ("acpi_get_gpe_status"); + + + /* Use semaphore lock if not executing at interrupt level */ + + if (flags & ACPI_NOT_ISR) { + status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* 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); + +unlock_and_exit: + if (flags & ACPI_NOT_ISR) { + (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); + } + return_ACPI_STATUS (status); +} +#endif /* ACPI_FUTURE_USAGE */ + + +/******************************************************************************* + * + * 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_level - 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_level) +{ + 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_map_handle_to_node (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_level, &gpe_block); + if (ACPI_FAILURE (status)) { + goto unlock_and_exit; + } + + /* Get the device_object attached to the node */ + + obj_desc = acpi_ns_get_attached_object (node); + if (!obj_desc) { + /* No object, create a new one */ + + 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; + } + } + + /* 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); +} +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_map_handle_to_node (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); +} +EXPORT_SYMBOL(acpi_remove_gpe_block); |