From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/acpi/events/evevent.c | 297 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 297 insertions(+) create mode 100644 drivers/acpi/events/evevent.c (limited to 'drivers/acpi/events/evevent.c') diff --git a/drivers/acpi/events/evevent.c b/drivers/acpi/events/evevent.c new file mode 100644 index 00000000000..2a213604ae5 --- /dev/null +++ b/drivers/acpi/events/evevent.c @@ -0,0 +1,297 @@ +/****************************************************************************** + * + * Module Name: evevent - Fixed Event handling and dispatch + * + *****************************************************************************/ + +/* + * 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 +#include + +#define _COMPONENT ACPI_EVENTS + ACPI_MODULE_NAME ("evevent") + + +/******************************************************************************* + * + * FUNCTION: acpi_ev_initialize_events + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initialize global data structures for events. + * + ******************************************************************************/ + +acpi_status +acpi_ev_initialize_events ( + void) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("ev_initialize_events"); + + + /* Make sure we have ACPI tables */ + + if (!acpi_gbl_DSDT) { + ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No ACPI tables present!\n")); + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + /* + * Initialize the Fixed and General Purpose Events. This is + * done prior to enabling SCIs to prevent interrupts from + * occurring before handers are installed. + */ + status = acpi_ev_fixed_event_initialize (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (( + "Unable to initialize fixed events, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + status = acpi_ev_gpe_initialize (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (( + "Unable to initialize general purpose events, %s\n", + acpi_format_exception (status))); + 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"); + + + /* Install the SCI handler */ + + status = acpi_ev_install_sci_handler (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (( + "Unable to install System Control Interrupt Handler, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + /* Install the handler for the Global Lock */ + + status = acpi_ev_init_global_lock_handler (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (( + "Unable to initialize Global Lock handler, %s\n", + acpi_format_exception (status))); + 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 enable the fixed events. + * + ******************************************************************************/ + +acpi_status +acpi_ev_fixed_event_initialize ( + void) +{ + acpi_native_uint 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; + + /* Enable the fixed event */ + + if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) { + status = acpi_set_register (acpi_gbl_fixed_event_info[i].enable_register_id, + 0, ACPI_MTX_LOCK); + 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 fixed events + * + ******************************************************************************/ + +u32 +acpi_ev_fixed_event_detect ( + void) +{ + u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; + u32 fixed_status; + u32 fixed_enable; + acpi_native_uint 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_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, &fixed_status); + (void) acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, 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 */ + + int_status |= acpi_ev_fixed_event_dispatch ((u32) 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. + * + ******************************************************************************/ + +u32 +acpi_ev_fixed_event_dispatch ( + u32 event) +{ + + + ACPI_FUNCTION_ENTRY (); + + + /* Clear the status bit */ + + (void) acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id, + 1, ACPI_MTX_DO_NOT_LOCK); + + /* + * Make sure we've got a handler. If not, report an error. + * The event is disabled to prevent further interrupts. + */ + if (NULL == acpi_gbl_fixed_event_handlers[event].handler) { + (void) acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id, + 0, ACPI_MTX_DO_NOT_LOCK); + + ACPI_REPORT_ERROR ( + ("No installed handler for fixed event [%08X]\n", + 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)); +} + + -- cgit v1.2.3