1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/acpi/events/evmisc.c b/drivers/acpi/events/evmisc.c
new file mode 100644
index 000000000000..2548efa7a45f
--- /dev/null
+++ b/drivers/acpi/events/evmisc.c
@@ -0,0 +1,588 @@
+/******************************************************************************
+ *
+ * Module Name: evmisc - Miscellaneous event manager support functions
+ *
+ *****************************************************************************/
+
+/*
+ * 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>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+         ACPI_MODULE_NAME    ("evmisc")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_is_notify_object
+ *
+ * PARAMETERS:  Node            - Node to check
+ *
+ * RETURN:      TRUE if notifies allowed on this object
+ *
+ * DESCRIPTION: Check type of node for a object that supports notifies.
+ *
+ *              TBD: This could be replaced by a flag bit in the node.
+ *
+ ******************************************************************************/
+
+u8
+acpi_ev_is_notify_object (
+        struct acpi_namespace_node      *node)
+{
+        switch (node->type) {
+        case ACPI_TYPE_DEVICE:
+        case ACPI_TYPE_PROCESSOR:
+        case ACPI_TYPE_POWER:
+        case ACPI_TYPE_THERMAL:
+                /*
+                 * These are the ONLY objects that can receive ACPI notifications
+                 */
+                return (TRUE);
+
+        default:
+                return (FALSE);
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_queue_notify_request
+ *
+ * PARAMETERS:  Node            - NS node for the notified object
+ *              notify_value    - Value from the Notify() request
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Dispatch a device notification event to a previously
+ *              installed handler.
+ *
+ ******************************************************************************/
+
+#ifdef ACPI_DEBUG_OUTPUT
+static const char                *acpi_notify_value_names[] =
+{
+        "Bus Check",
+        "Device Check",
+        "Device Wake",
+        "Eject request",
+        "Device Check Light",
+        "Frequency Mismatch",
+        "Bus Mode Mismatch",
+        "Power Fault"
+};
+#endif
+
+acpi_status
+acpi_ev_queue_notify_request (
+        struct acpi_namespace_node      *node,
+        u32                             notify_value)
+{
+        union acpi_operand_object       *obj_desc;
+        union acpi_operand_object       *handler_obj = NULL;
+        union acpi_generic_state        *notify_info;
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_NAME ("ev_queue_notify_request");
+
+
+        /*
+         * For value 3 (Ejection Request), some device method may need to be run.
+         * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run.
+         * For value 0x80 (Status Change) on the power button or sleep button,
+         * initiate soft-off or sleep operation?
+         */
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                "Dispatching Notify(%X) on node %p\n", notify_value, node));
+
+        if (notify_value <= 7) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: %s\n",
+                                acpi_notify_value_names[notify_value]));
+        }
+        else {
+                ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: 0x%2.2X **Device Specific**\n",
+                                notify_value));
+        }
+
+        /* Get the notify object attached to the NS Node */
+
+        obj_desc = acpi_ns_get_attached_object (node);
+        if (obj_desc) {
+                /* We have the notify object, Get the right handler */
+
+                switch (node->type) {
+                case ACPI_TYPE_DEVICE:
+                case ACPI_TYPE_THERMAL:
+                case ACPI_TYPE_PROCESSOR:
+                case ACPI_TYPE_POWER:
+
+                        if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
+                                handler_obj = obj_desc->common_notify.system_notify;
+                        }
+                        else {
+                                handler_obj = obj_desc->common_notify.device_notify;
+                        }
+                        break;
+
+                default:
+                        /* All other types are not supported */
+                        return (AE_TYPE);
+                }
+        }
+
+        /* If there is any handler to run, schedule the dispatcher */
+
+        if ((acpi_gbl_system_notify.handler && (notify_value <= ACPI_MAX_SYS_NOTIFY)) ||
+                (acpi_gbl_device_notify.handler && (notify_value > ACPI_MAX_SYS_NOTIFY)) ||
+                handler_obj) {
+                notify_info = acpi_ut_create_generic_state ();
+                if (!notify_info) {
+                        return (AE_NO_MEMORY);
+                }
+
+                notify_info->common.data_type = ACPI_DESC_TYPE_STATE_NOTIFY;
+                notify_info->notify.node      = node;
+                notify_info->notify.value     = (u16) notify_value;
+                notify_info->notify.handler_obj = handler_obj;
+
+                status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
+                                  acpi_ev_notify_dispatch, notify_info);
+                if (ACPI_FAILURE (status)) {
+                        acpi_ut_delete_generic_state (notify_info);
+                }
+        }
+
+        if (!handler_obj) {
+                /*
+                 * There is no per-device notify handler for this device.
+                 * This may or may not be a problem.
+                 */
+                ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                        "No notify handler for Notify(%4.4s, %X) node %p\n",
+                        acpi_ut_get_node_name (node), notify_value, node));
+        }
+
+        return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_notify_dispatch
+ *
+ * PARAMETERS:  Context         - To be passsed to the notify handler
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Dispatch a device notification event to a previously
+ *              installed handler.
+ *
+ ******************************************************************************/
+
+void ACPI_SYSTEM_XFACE
+acpi_ev_notify_dispatch (
+        void                            *context)
+{
+        union acpi_generic_state        *notify_info = (union acpi_generic_state *) context;
+        acpi_notify_handler             global_handler = NULL;
+        void                            *global_context = NULL;
+        union acpi_operand_object       *handler_obj;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        /*
+         * We will invoke a global notify handler if installed.
+         * This is done _before_ we invoke the per-device handler attached to the device.
+         */
+        if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) {
+                /* Global system notification handler */
+
+                if (acpi_gbl_system_notify.handler) {
+                        global_handler = acpi_gbl_system_notify.handler;
+                        global_context = acpi_gbl_system_notify.context;
+                }
+        }
+        else {
+                /* Global driver notification handler */
+
+                if (acpi_gbl_device_notify.handler) {
+                        global_handler = acpi_gbl_device_notify.handler;
+                        global_context = acpi_gbl_device_notify.context;
+                }
+        }
+
+        /* Invoke the system handler first, if present */
+
+        if (global_handler) {
+                global_handler (notify_info->notify.node, notify_info->notify.value, global_context);
+        }
+
+        /* Now invoke the per-device handler, if present */
+
+        handler_obj = notify_info->notify.handler_obj;
+        if (handler_obj) {
+                handler_obj->notify.handler (notify_info->notify.node, notify_info->notify.value,
+                                  handler_obj->notify.context);
+        }
+
+        /* All done with the info object */
+
+        acpi_ut_delete_generic_state (notify_info);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_global_lock_thread
+ *
+ * PARAMETERS:  Context         - From thread interface, not used
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the
+ *              Global Lock.  Simply signal all threads that are waiting
+ *              for the lock.
+ *
+ ******************************************************************************/
+
+static void ACPI_SYSTEM_XFACE
+acpi_ev_global_lock_thread (
+        void                            *context)
+{
+        acpi_status                     status;
+
+
+        /* Signal threads that are waiting for the lock */
+
+        if (acpi_gbl_global_lock_thread_count) {
+                /* Send sufficient units to the semaphore */
+
+                status = acpi_os_signal_semaphore (acpi_gbl_global_lock_semaphore,
+                                 acpi_gbl_global_lock_thread_count);
+                if (ACPI_FAILURE (status)) {
+                        ACPI_REPORT_ERROR (("Could not signal Global Lock semaphore\n"));
+                }
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_global_lock_handler
+ *
+ * PARAMETERS:  Context         - From thread interface, not used
+ *
+ * RETURN:      ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Invoked directly from the SCI handler when a global lock
+ *              release interrupt occurs.  Grab the global lock and queue
+ *              the global lock thread for execution
+ *
+ ******************************************************************************/
+
+static u32
+acpi_ev_global_lock_handler (
+        void                            *context)
+{
+        u8                              acquired = FALSE;
+        acpi_status                     status;
+
+
+        /*
+         * Attempt to get the lock
+         * If we don't get it now, it will be marked pending and we will
+         * take another interrupt when it becomes free.
+         */
+        ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
+        if (acquired) {
+                /* Got the lock, now wake all threads waiting for it */
+
+                acpi_gbl_global_lock_acquired = TRUE;
+
+                /* Run the Global Lock thread which will signal all waiting threads */
+
+                status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
+                                  acpi_ev_global_lock_thread, context);
+                if (ACPI_FAILURE (status)) {
+                        ACPI_REPORT_ERROR (("Could not queue Global Lock thread, %s\n",
+                                acpi_format_exception (status)));
+
+                        return (ACPI_INTERRUPT_NOT_HANDLED);
+                }
+        }
+
+        return (ACPI_INTERRUPT_HANDLED);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_init_global_lock_handler
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for the global lock release event
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_init_global_lock_handler (void)
+{
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("ev_init_global_lock_handler");
+
+
+        acpi_gbl_global_lock_present = TRUE;
+        status = acpi_install_fixed_event_handler (ACPI_EVENT_GLOBAL,
+                          acpi_ev_global_lock_handler, NULL);
+
+        /*
+         * If the global lock does not exist on this platform, the attempt
+         * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick)
+         * Map to AE_OK, but mark global lock as not present.
+         * Any attempt to actually use the global lock will be flagged
+         * with an error.
+         */
+        if (status == AE_NO_HARDWARE_RESPONSE) {
+                acpi_gbl_global_lock_present = FALSE;
+                status = AE_OK;
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_acquire_global_lock
+ *
+ * PARAMETERS:  Timeout         - Max time to wait for the lock, in millisec.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Attempt to gain ownership of the Global Lock.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_ev_acquire_global_lock (
+        u16                             timeout)
+{
+        acpi_status                     status = AE_OK;
+        u8                              acquired = FALSE;
+
+
+        ACPI_FUNCTION_TRACE ("ev_acquire_global_lock");
+
+
+#ifndef ACPI_APPLICATION
+        /* Make sure that we actually have a global lock */
+
+        if (!acpi_gbl_global_lock_present) {
+                return_ACPI_STATUS (AE_NO_GLOBAL_LOCK);
+        }
+#endif
+
+        /* One more thread wants the global lock */
+
+        acpi_gbl_global_lock_thread_count++;
+
+        /* If we (OS side vs. BIOS side) have the hardware lock already, we are done */
+
+        if (acpi_gbl_global_lock_acquired) {
+                return_ACPI_STATUS (AE_OK);
+        }
+
+        /* We must acquire the actual hardware lock */
+
+        ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
+        if (acquired) {
+           /* We got the lock */
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired the HW Global Lock\n"));
+
+                acpi_gbl_global_lock_acquired = TRUE;
+                return_ACPI_STATUS (AE_OK);
+        }
+
+        /*
+         * Did not get the lock.  The pending bit was set above, and we must now
+         * wait until we get the global lock released interrupt.
+         */
+        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n"));
+
+        /*
+         * Acquire the global lock semaphore first.
+         * Since this wait will block, we must release the interpreter
+         */
+        status = acpi_ex_system_wait_semaphore (acpi_gbl_global_lock_semaphore,
+                          timeout);
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_release_global_lock
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Releases ownership of the Global Lock.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_release_global_lock (void)
+{
+        u8                              pending = FALSE;
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("ev_release_global_lock");
+
+
+        if (!acpi_gbl_global_lock_thread_count) {
+                ACPI_REPORT_WARNING(("Cannot release HW Global Lock, it has not been acquired\n"));
+                return_ACPI_STATUS (AE_NOT_ACQUIRED);
+        }
+
+        /* One fewer thread has the global lock */
+
+        acpi_gbl_global_lock_thread_count--;
+        if (acpi_gbl_global_lock_thread_count) {
+                /* There are still some threads holding the lock, cannot release */
+
+                return_ACPI_STATUS (AE_OK);
+        }
+
+        /*
+         * No more threads holding lock, we can do the actual hardware
+         * release
+         */
+        ACPI_RELEASE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, pending);
+        acpi_gbl_global_lock_acquired = FALSE;
+
+        /*
+         * If the pending bit was set, we must write GBL_RLS to the control
+         * register
+         */
+        if (pending) {
+                status = acpi_set_register (ACPI_BITREG_GLOBAL_LOCK_RELEASE, 1, ACPI_MTX_LOCK);
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Disable events and free memory allocated for table storage.
+ *
+ ******************************************************************************/
+
+void
+acpi_ev_terminate (void)
+{
+        acpi_native_uint                i;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("ev_terminate");
+
+
+        if (acpi_gbl_events_initialized) {
+                /*
+                 * Disable all event-related functionality.
+                 * In all cases, on error, print a message but obviously we don't abort.
+                 */
+
+                /* Disable all fixed events */
+
+                for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+                        status = acpi_disable_event ((u32) i, 0);
+                        if (ACPI_FAILURE (status)) {
+                                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not disable fixed event %d\n", (u32) i));
+                        }
+                }
+
+                /* Disable all GPEs in all GPE blocks */
+
+                status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block, ACPI_NOT_ISR);
+
+                /* Remove SCI handler */
+
+                status = acpi_ev_remove_sci_handler ();
+                if (ACPI_FAILURE(status)) {
+                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not remove SCI handler\n"));
+                }
+        }
+
+        /* Deallocate all handler objects installed within GPE info structs */
+
+        status = acpi_ev_walk_gpe_list (acpi_ev_delete_gpe_handlers, ACPI_NOT_ISR);
+
+        /* Return to original mode if necessary */
+
+        if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
+                status = acpi_disable ();
+                if (ACPI_FAILURE (status)) {
+                        ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_disable failed\n"));
+                }
+        }
+        return_VOID;
+}
+