diff options
Diffstat (limited to 'drivers/acpi/events/evgpe.c')
| -rw-r--r-- | drivers/acpi/events/evgpe.c | 725 |
1 files changed, 0 insertions, 725 deletions
diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c deleted file mode 100644 index f45c74fe745e..000000000000 --- a/drivers/acpi/events/evgpe.c +++ /dev/null @@ -1,725 +0,0 @@ -/****************************************************************************** - * - * Module Name: evgpe - General Purpose Event handling and dispatch - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/acevents.h> -#include <acpi/acnamesp.h> - -#define _COMPONENT ACPI_EVENTS -ACPI_MODULE_NAME("evgpe") - -/* Local prototypes */ -static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); - -/******************************************************************************* - * - * FUNCTION: acpi_ev_set_gpe_type - * - * PARAMETERS: gpe_event_info - GPE to set - * Type - New type - * - * RETURN: Status - * - * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) - * - ******************************************************************************/ - -acpi_status -acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_set_gpe_type); - - /* Validate type and update register enable masks */ - - switch (type) { - case ACPI_GPE_TYPE_WAKE: - case ACPI_GPE_TYPE_RUNTIME: - case ACPI_GPE_TYPE_WAKE_RUN: - break; - - default: - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Disable the GPE if currently enabled */ - - status = acpi_ev_disable_gpe(gpe_event_info); - - /* Type was validated above */ - - gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ - gpe_event_info->flags |= type; /* Insert type */ - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_update_gpe_enable_masks - * - * PARAMETERS: gpe_event_info - GPE to update - * Type - What to do: ACPI_GPE_DISABLE or - * ACPI_GPE_ENABLE - * - * RETURN: Status - * - * DESCRIPTION: Updates GPE register enable masks based on the GPE type - * - ******************************************************************************/ - -acpi_status -acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info, - u8 type) -{ - struct acpi_gpe_register_info *gpe_register_info; - u8 register_bit; - - ACPI_FUNCTION_TRACE(ev_update_gpe_enable_masks); - - gpe_register_info = gpe_event_info->register_info; - if (!gpe_register_info) { - return_ACPI_STATUS(AE_NOT_EXIST); - } - register_bit = (u8) - (1 << - (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number)); - - /* 1) Disable case. Simply clear all enable bits */ - - if (type == ACPI_GPE_DISABLE) { - ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, - register_bit); - ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); - return_ACPI_STATUS(AE_OK); - } - - /* 2) Enable case. Set/Clear the appropriate enable bits */ - - switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { - case ACPI_GPE_TYPE_WAKE: - ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); - ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); - break; - - case ACPI_GPE_TYPE_RUNTIME: - ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, - register_bit); - ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); - break; - - case ACPI_GPE_TYPE_WAKE_RUN: - ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); - ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); - break; - - default: - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_enable_gpe - * - * PARAMETERS: gpe_event_info - GPE to enable - * write_to_hardware - Enable now, or just mark data structs - * (WAKE GPEs should be deferred) - * - * RETURN: Status - * - * DESCRIPTION: Enable a GPE based on the GPE type - * - ******************************************************************************/ - -acpi_status -acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info, - u8 write_to_hardware) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_enable_gpe); - - /* Make sure HW enable masks are updated */ - - status = - acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Mark wake-enabled or HW enable, or both */ - - switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { - case ACPI_GPE_TYPE_WAKE: - - ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); - break; - - case ACPI_GPE_TYPE_WAKE_RUN: - - ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); - - /*lint -fallthrough */ - - case ACPI_GPE_TYPE_RUNTIME: - - ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); - - if (write_to_hardware) { - - /* Clear the GPE (of stale events), then enable it */ - - status = acpi_hw_clear_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Enable the requested runtime GPE */ - - status = acpi_hw_write_gpe_enable_reg(gpe_event_info); - } - break; - - default: - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_disable_gpe - * - * PARAMETERS: gpe_event_info - GPE to disable - * - * RETURN: Status - * - * DESCRIPTION: Disable a GPE based on the GPE type - * - ******************************************************************************/ - -acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_disable_gpe); - - /* Make sure HW enable masks are updated */ - - status = - acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Clear the appropriate enabled flags for this GPE */ - - switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { - case ACPI_GPE_TYPE_WAKE: - ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); - break; - - case ACPI_GPE_TYPE_WAKE_RUN: - ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); - - /* fallthrough */ - - case ACPI_GPE_TYPE_RUNTIME: - - /* Disable the requested runtime GPE */ - - ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); - break; - - default: - break; - } - - /* - * Even if we don't know the GPE type, make sure that we always - * disable it. low_disable_gpe will just clear the enable bit for this - * GPE and write it. It will not write out the current GPE enable mask, - * since this may inadvertently enable GPEs too early, if a rogue GPE has - * come in during ACPICA initialization - possibly as a result of AML or - * other code that has enabled the GPE. - */ - status = acpi_hw_low_disable_gpe(gpe_event_info); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_get_gpe_event_info - * - * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 - * gpe_number - Raw GPE number - * - * RETURN: A GPE event_info struct. NULL if not a valid GPE - * - * DESCRIPTION: Returns the event_info struct associated with this GPE. - * Validates the gpe_block and the gpe_number - * - * Should be called only when the GPE lists are semaphore locked - * and not subject to change. - * - ******************************************************************************/ - -struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, - u32 gpe_number) -{ - union acpi_operand_object *obj_desc; - struct acpi_gpe_block_info *gpe_block; - u32 i; - - ACPI_FUNCTION_ENTRY(); - - /* A NULL gpe_block means use the FADT-defined GPE block(s) */ - - if (!gpe_device) { - - /* Examine GPE Block 0 and 1 (These blocks are permanent) */ - - for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { - gpe_block = acpi_gbl_gpe_fadt_blocks[i]; - if (gpe_block) { - if ((gpe_number >= gpe_block->block_base_number) - && (gpe_number < - gpe_block->block_base_number + - (gpe_block->register_count * 8))) { - return (&gpe_block-> - event_info[gpe_number - - gpe_block-> - block_base_number]); - } - } - } - - /* The gpe_number was not in the range of either FADT GPE block */ - - return (NULL); - } - - /* A Non-NULL gpe_device means this is a GPE Block Device */ - - obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *) - gpe_device); - if (!obj_desc || !obj_desc->device.gpe_block) { - return (NULL); - } - - gpe_block = obj_desc->device.gpe_block; - - if ((gpe_number >= gpe_block->block_base_number) && - (gpe_number < - gpe_block->block_base_number + (gpe_block->register_count * 8))) { - return (&gpe_block-> - event_info[gpe_number - gpe_block->block_base_number]); - } - - return (NULL); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_gpe_detect - * - * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. - * Can have multiple GPE blocks attached. - * - * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED - * - * DESCRIPTION: Detect if any GP events have occurred. This function is - * executed at interrupt level. - * - ******************************************************************************/ - -u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list) -{ - acpi_status status; - struct acpi_gpe_block_info *gpe_block; - struct acpi_gpe_register_info *gpe_register_info; - u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; - u8 enabled_status_byte; - u32 status_reg; - u32 enable_reg; - acpi_cpu_flags flags; - u32 i; - u32 j; - - ACPI_FUNCTION_NAME(ev_gpe_detect); - - /* Check for the case where there are no GPEs */ - - if (!gpe_xrupt_list) { - return (int_status); - } - - /* - * We need to obtain the GPE lock for both the data structs and registers - * Note: Not necessary to obtain the hardware lock, since the GPE registers - * are owned by the gpe_lock. - */ - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - - /* Examine all GPE blocks attached to this interrupt level */ - - gpe_block = gpe_xrupt_list->gpe_block_list_head; - while (gpe_block) { - /* - * Read all of the 8-bit GPE status and enable registers - * in this GPE block, saving all of them. - * Find all currently active GP events. - */ - for (i = 0; i < gpe_block->register_count; i++) { - - /* Get the next status/enable pair */ - - gpe_register_info = &gpe_block->register_info[i]; - - /* Read the Status Register */ - - status = - acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, - &status_reg, - &gpe_register_info-> - status_address); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* Read the Enable Register */ - - status = - acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, - &enable_reg, - &gpe_register_info-> - enable_address); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, - "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", - gpe_register_info->base_gpe_number, - status_reg, enable_reg)); - - /* Check if there is anything active at all in this register */ - - enabled_status_byte = (u8) (status_reg & enable_reg); - if (!enabled_status_byte) { - - /* No active GPEs in this register, move on */ - - continue; - } - - /* Now look at the individual GPEs in this byte register */ - - for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { - - /* Examine one GPE bit */ - - if (enabled_status_byte & (1 << j)) { - /* - * Found an active GPE. Dispatch the event to a handler - * or method. - */ - int_status |= - acpi_ev_gpe_dispatch(&gpe_block-> - event_info[((acpi_size) i * ACPI_GPE_REGISTER_WIDTH) + j], j + gpe_register_info->base_gpe_number); - } - } - } - - gpe_block = gpe_block->next; - } - - unlock_and_exit: - - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - return (int_status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_asynch_execute_gpe_method - * - * PARAMETERS: Context (gpe_event_info) - Info for this GPE - * - * RETURN: None - * - * DESCRIPTION: Perform the actual execution of a GPE control method. This - * function is called from an invocation of acpi_os_execute and - * therefore does NOT execute at interrupt level - so that - * the control method itself is not executed in the context of - * an interrupt handler. - * - ******************************************************************************/ -static void acpi_ev_asynch_enable_gpe(void *context); - -static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) -{ - struct acpi_gpe_event_info *gpe_event_info = (void *)context; - acpi_status status; - struct acpi_gpe_event_info local_gpe_event_info; - struct acpi_evaluate_info *info; - - ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_VOID; - } - - /* Must revalidate the gpe_number/gpe_block */ - - if (!acpi_ev_valid_gpe_event(gpe_event_info)) { - status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_VOID; - } - - /* Set the GPE flags for return to enabled state */ - - (void)acpi_ev_enable_gpe(gpe_event_info, FALSE); - - /* - * Take a snapshot of the GPE info for this level - we copy the - * info to prevent a race condition with remove_handler/remove_block. - */ - ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info, - sizeof(struct acpi_gpe_event_info)); - - status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_VOID; - } - - /* - * Must check for control method type dispatch one more - * time to avoid race with ev_gpe_install_handler - */ - if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_METHOD) { - - /* Allocate the evaluation information block */ - - info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); - if (!info) { - status = AE_NO_MEMORY; - } else { - /* - * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx - * control method that corresponds to this GPE - */ - info->prefix_node = - local_gpe_event_info.dispatch.method_node; - info->flags = ACPI_IGNORE_RETURN_VALUE; - - status = acpi_ns_evaluate(info); - ACPI_FREE(info); - } - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "while evaluating GPE method [%4.4s]", - acpi_ut_get_node_name - (local_gpe_event_info.dispatch. - method_node))); - } - } - /* Defer enabling of GPE until all notify handlers are done */ - acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe, - gpe_event_info); - return_VOID; -} - -static void acpi_ev_asynch_enable_gpe(void *context) -{ - struct acpi_gpe_event_info *gpe_event_info = context; - acpi_status status; - if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == - ACPI_GPE_LEVEL_TRIGGERED) { - /* - * GPE is level-triggered, we clear the GPE status bit after - * handling the event. - */ - status = acpi_hw_clear_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - return_VOID; - } - } - - /* Enable this GPE */ - (void)acpi_hw_write_gpe_enable_reg(gpe_event_info); - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_gpe_dispatch - * - * PARAMETERS: gpe_event_info - Info for this GPE - * gpe_number - Number relative to the parent GPE block - * - * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED - * - * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) - * or method (e.g. _Lxx/_Exx) handler. - * - * This function executes at interrupt level. - * - ******************************************************************************/ - -u32 -acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_gpe_dispatch); - - acpi_os_gpe_count(gpe_number); - - /* - * If edge-triggered, clear the GPE status bit now. Note that - * level-triggered events are cleared after the GPE is serviced. - */ - if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == - ACPI_GPE_EDGE_TRIGGERED) { - status = acpi_hw_clear_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Unable to clear GPE[%2X]", - gpe_number)); - return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); - } - } - - /* - * Dispatch the GPE to either an installed handler, or the control method - * associated with this GPE (_Lxx or _Exx). If a handler exists, we invoke - * it and do not attempt to run the method. If there is neither a handler - * nor a method, we disable this GPE to prevent further such pointless - * events from firing. - */ - switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { - case ACPI_GPE_DISPATCH_HANDLER: - - /* - * Invoke the installed handler (at interrupt level) - * Ignore return status for now. TBD: leave GPE disabled on error? - */ - (void)gpe_event_info->dispatch.handler->address(gpe_event_info-> - dispatch. - handler-> - context); - - /* It is now safe to clear level-triggered events. */ - - if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == - ACPI_GPE_LEVEL_TRIGGERED) { - status = acpi_hw_clear_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Unable to clear GPE[%2X]", - gpe_number)); - return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); - } - } - break; - - case ACPI_GPE_DISPATCH_METHOD: - - /* - * Disable the GPE, so it doesn't keep firing before the method has a - * chance to run (it runs asynchronously with interrupts enabled). - */ - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Unable to disable GPE[%2X]", - gpe_number)); - return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); - } - - /* - * Execute the method associated with the GPE - * NOTE: Level-triggered GPEs are cleared after the method completes. - */ - status = acpi_os_execute(OSL_GPE_HANDLER, - acpi_ev_asynch_execute_gpe_method, - gpe_event_info); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Unable to queue handler for GPE[%2X] - event disabled", - gpe_number)); - } - break; - - default: - - /* No handler or method to run! */ - - ACPI_ERROR((AE_INFO, - "No handler or method for GPE[%2X], disabling event", - gpe_number)); - - /* - * Disable the GPE. The GPE will remain disabled until the ACPI - * Core Subsystem is restarted, or a handler is installed. - */ - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Unable to disable GPE[%2X]", - gpe_number)); - return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); - } - break; - } - - return_UINT32(ACPI_INTERRUPT_HANDLED); -} |