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/****************************************************************************** |
* |
* Module Name: evevent - Fixed Event handling and dispatch |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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" |
|
#define _COMPONENT ACPI_EVENTS |
ACPI_MODULE_NAME("evevent") |
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
/* Local prototypes */ |
static acpi_status acpi_ev_fixed_event_initialize(void); |
|
static u32 acpi_ev_fixed_event_dispatch(u32 event); |
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/******************************************************************************* |
* |
* FUNCTION: acpi_ev_initialize_events |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE) |
* |
******************************************************************************/ |
|
acpi_status acpi_ev_initialize_events(void) |
{ |
acpi_status status; |
|
ACPI_FUNCTION_TRACE(ev_initialize_events); |
|
/* If Hardware Reduced flag is set, there are no fixed events */ |
|
if (acpi_gbl_reduced_hardware) { |
return_ACPI_STATUS(AE_OK); |
} |
|
/* |
* Initialize the Fixed and General Purpose Events. This is done prior to |
* enabling SCIs to prevent interrupts from occurring before the handlers |
* are installed. |
*/ |
status = acpi_ev_fixed_event_initialize(); |
if (ACPI_FAILURE(status)) { |
ACPI_EXCEPTION((AE_INFO, status, |
"Unable to initialize fixed events")); |
return_ACPI_STATUS(status); |
} |
|
status = acpi_ev_gpe_initialize(); |
if (ACPI_FAILURE(status)) { |
ACPI_EXCEPTION((AE_INFO, status, |
"Unable to initialize general purpose events")); |
return_ACPI_STATUS(status); |
} |
|
return_ACPI_STATUS(status); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_install_xrupt_handlers |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Install interrupt handlers for the SCI and Global Lock |
* |
******************************************************************************/ |
|
acpi_status acpi_ev_install_xrupt_handlers(void) |
{ |
acpi_status status; |
|
ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers); |
|
/* If Hardware Reduced flag is set, there is no ACPI h/w */ |
|
if (acpi_gbl_reduced_hardware) { |
return_ACPI_STATUS(AE_OK); |
} |
|
/* Install the SCI handler */ |
|
status = acpi_ev_install_sci_handler(); |
if (ACPI_FAILURE(status)) { |
ACPI_EXCEPTION((AE_INFO, status, |
"Unable to install System Control Interrupt handler")); |
return_ACPI_STATUS(status); |
} |
|
/* Install the handler for the Global Lock */ |
|
status = acpi_ev_init_global_lock_handler(); |
if (ACPI_FAILURE(status)) { |
ACPI_EXCEPTION((AE_INFO, status, |
"Unable to initialize Global Lock handler")); |
return_ACPI_STATUS(status); |
} |
|
acpi_gbl_events_initialized = TRUE; |
return_ACPI_STATUS(status); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_fixed_event_initialize |
* |
* PARAMETERS: None |
* |
* RETURN: Status |
* |
* DESCRIPTION: Install the fixed event handlers and disable all fixed events. |
* |
******************************************************************************/ |
|
static acpi_status acpi_ev_fixed_event_initialize(void) |
{ |
u32 i; |
acpi_status status; |
|
/* |
* Initialize the structure that keeps track of fixed event handlers and |
* enable the fixed events. |
*/ |
for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
acpi_gbl_fixed_event_handlers[i].handler = NULL; |
acpi_gbl_fixed_event_handlers[i].context = NULL; |
|
/* Disable the fixed event */ |
|
if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { |
status = |
acpi_write_bit_register(acpi_gbl_fixed_event_info |
[i].enable_register_id, |
ACPI_DISABLE_EVENT); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
} |
} |
|
return (AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_fixed_event_detect |
* |
* PARAMETERS: None |
* |
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
* |
* DESCRIPTION: Checks the PM status register for active fixed events |
* |
******************************************************************************/ |
|
u32 acpi_ev_fixed_event_detect(void) |
{ |
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
u32 fixed_status; |
u32 fixed_enable; |
u32 i; |
|
ACPI_FUNCTION_NAME(ev_fixed_event_detect); |
|
/* |
* Read the fixed feature status and enable registers, as all the cases |
* depend on their values. Ignore errors here. |
*/ |
(void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status); |
(void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable); |
|
ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
"Fixed Event Block: Enable %08X Status %08X\n", |
fixed_enable, fixed_status)); |
|
/* |
* Check for all possible Fixed Events and dispatch those that are active |
*/ |
for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
|
/* Both the status and enable bits must be on for this event */ |
|
if ((fixed_status & acpi_gbl_fixed_event_info[i]. |
status_bit_mask) |
&& (fixed_enable & acpi_gbl_fixed_event_info[i]. |
enable_bit_mask)) { |
/* |
* Found an active (signalled) event. Invoke global event |
* handler if present. |
*/ |
acpi_fixed_event_count[i]++; |
if (acpi_gbl_global_event_handler) { |
acpi_gbl_global_event_handler |
(ACPI_EVENT_TYPE_FIXED, NULL, i, |
acpi_gbl_global_event_handler_context); |
} |
|
int_status |= acpi_ev_fixed_event_dispatch(i); |
} |
} |
|
return (int_status); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_ev_fixed_event_dispatch |
* |
* PARAMETERS: event - Event type |
* |
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
* |
* DESCRIPTION: Clears the status bit for the requested event, calls the |
* handler that previously registered for the event. |
* NOTE: If there is no handler for the event, the event is |
* disabled to prevent further interrupts. |
* |
******************************************************************************/ |
|
static u32 acpi_ev_fixed_event_dispatch(u32 event) |
{ |
|
ACPI_FUNCTION_ENTRY(); |
|
/* Clear the status bit */ |
|
(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
status_register_id, ACPI_CLEAR_STATUS); |
|
/* |
* Make sure that a handler exists. If not, report an error |
* and disable the event to prevent further interrupts. |
*/ |
if (!acpi_gbl_fixed_event_handlers[event].handler) { |
(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event]. |
enable_register_id, |
ACPI_DISABLE_EVENT); |
|
ACPI_ERROR((AE_INFO, |
"No installed handler for fixed event - %s (%u), disabling", |
acpi_ut_get_event_name(event), event)); |
|
return (ACPI_INTERRUPT_NOT_HANDLED); |
} |
|
/* Invoke the Fixed Event handler */ |
|
return ((acpi_gbl_fixed_event_handlers[event]. |
handler) (acpi_gbl_fixed_event_handlers[event].context)); |
} |
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#endif /* !ACPI_REDUCED_HARDWARE */ |