1 files changed, 297 insertions, 0 deletions

diff --git a/drivers/acpi/events/evevent.c b/drivers/acpi/events/evevent.c
new file mode 100644
index 000000000000..2a213604ae51
--- /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 <acpi/acpi.h>
+#include <acpi/acevents.h>
+
+#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));
+}
+
+