1 files changed, 183 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evsci.c b/drivers/acpi/acpica/evsci.c
new file mode 100644
index 000000000000..567b356c85af
--- /dev/null
+++ b/drivers/acpi/acpica/evsci.c
@@ -0,0 +1,183 @@
+/*******************************************************************************
+ *
+ * Module Name: evsci - System Control Interrupt configuration and
+ *                      legacy to ACPI mode state transition functions
+ *
+ ******************************************************************************/
+
+/*
+ * 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 "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evsci")
+
+/* Local prototypes */
+static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_sci_xrupt_handler
+ *
+ * PARAMETERS:  Context   - Calling Context
+ *
+ * RETURN:      Status code indicates whether interrupt was handled.
+ *
+ * DESCRIPTION: Interrupt handler that will figure out what function or
+ *              control method to call to deal with a SCI.
+ *
+ ******************************************************************************/
+
+static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
+{
+        struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
+        u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
+
+        ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
+
+        /*
+         * We are guaranteed by the ACPI CA initialization/shutdown code that
+         * if this interrupt handler is installed, ACPI is enabled.
+         */
+
+        /*
+         * Fixed Events:
+         * Check for and dispatch any Fixed Events that have occurred
+         */
+        interrupt_handled |= acpi_ev_fixed_event_detect();
+
+        /*
+         * General Purpose Events:
+         * Check for and dispatch any GPEs that have occurred
+         */
+        interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
+
+        return_UINT32(interrupt_handled);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_xrupt_handler
+ *
+ * PARAMETERS:  Context   - Calling Context
+ *
+ * RETURN:      Status code indicates whether interrupt was handled.
+ *
+ * DESCRIPTION: Handler for GPE Block Device interrupts
+ *
+ ******************************************************************************/
+
+u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
+{
+        struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
+        u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
+
+        ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
+
+        /*
+         * We are guaranteed by the ACPI CA initialization/shutdown code that
+         * if this interrupt handler is installed, ACPI is enabled.
+         */
+
+        /* GPEs: Check for and dispatch any GPEs that have occurred */
+
+        interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
+
+        return_UINT32(interrupt_handled);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs SCI handler.
+ *
+ ******************************************************************************/
+
+u32 acpi_ev_install_sci_handler(void)
+{
+        u32 status = AE_OK;
+
+        ACPI_FUNCTION_TRACE(ev_install_sci_handler);
+
+        status =
+            acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
+                                              acpi_ev_sci_xrupt_handler,
+                                              acpi_gbl_gpe_xrupt_list_head);
+        return_ACPI_STATUS(status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_remove_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not
+ *              installed to begin with
+ *
+ * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
+ *              taken.
+ *
+ * Note:  It doesn't seem important to disable all events or set the event
+ *        enable registers to their original values. The OS should disable
+ *        the SCI interrupt level when the handler is removed, so no more
+ *        events will come in.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_remove_sci_handler(void)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(ev_remove_sci_handler);
+
+        /* Just let the OS remove the handler and disable the level */
+
+        status =
+            acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
+                                             acpi_ev_sci_xrupt_handler);
+
+        return_ACPI_STATUS(status);
+}