patch-2.4.0-test3 linux/drivers/acpi/events/evxfevnt.c

• Lines: 514
• Date: Wed Jul 5 11:23:12 2000
• Orig file: v2.4.0-test2/linux/drivers/acpi/events/evxfevnt.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/acpi/events/evxfevnt.c linux/drivers/acpi/events/evxfevnt.c
@@ -0,0 +1,513 @@
+/******************************************************************************
+ *
+ * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000 R. Byron Moore
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "acpi.h"
+#include "hardware.h"
+#include "namesp.h"
+#include "events.h"
+#include "amlcode.h"
+#include "interp.h"
+
+#define _COMPONENT          EVENT_HANDLING
+	 MODULE_NAME         ("evxfevnt");
+
+
+/**************************************************************************
+ *
+ * FUNCTION:    Acpi_enable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Ensures that the system control interrupt (SCI) is properly
+ *              configured, disables SCI event sources, installs the SCI
+ *              handler, and transfers the system into ACPI mode.
+ *
+ *************************************************************************/
+
+ACPI_STATUS
+acpi_enable (void)
+{
+	ACPI_STATUS             status;
+
+
+	/* Make sure we've got ACPI tables */
+
+	if (!acpi_gbl_DSDT) {
+		return (AE_NO_ACPI_TABLES);
+	}
+
+	/* Make sure the BIOS supports ACPI mode */
+
+	if (SYS_MODE_LEGACY == acpi_hw_get_mode_capabilities()) {
+		return (AE_ERROR);
+	}
+
+	acpi_gbl_original_mode = acpi_hw_get_mode();
+
+	/*
+	 * Initialize the Fixed and General Purpose Acpi_events prior. This is
+	 * done prior to enabling SCIs to prevent interrupts from occuring
+	 * before handers are installed.
+	 */
+
+	if (ACPI_FAILURE (acpi_ev_fixed_event_initialize ())) {
+		return (AE_ERROR);
+	}
+
+	if (ACPI_FAILURE (acpi_ev_gpe_initialize())) {
+		return (AE_ERROR);
+	}
+
+	/* Install the SCI handler */
+
+	if (ACPI_FAILURE (acpi_ev_install_sci_handler ())) {
+		return (AE_ERROR);
+	}
+
+	/* Transition to ACPI mode */
+
+	if (AE_OK != acpi_hw_set_mode (SYS_MODE_ACPI)) {
+		return (AE_ERROR);
+	}
+
+	/* Install handlers for control method GPE handlers (_Lxx, _Exx) */
+
+	acpi_ev_init_gpe_control_methods ();
+
+	status = acpi_ev_init_global_lock_handler ();
+
+	return (status);
+}
+
+
+/**************************************************************************
+ *
+ * FUNCTION:    Acpi_disable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Returns the system to original ACPI/legacy mode, and
+ *              uninstalls the SCI interrupt handler.
+ *
+ *************************************************************************/
+
+ACPI_STATUS
+acpi_disable (void)
+{
+
+
+	/* Restore original mode  */
+
+	if (AE_OK != acpi_hw_set_mode (acpi_gbl_original_mode)) {
+		return (AE_ERROR);
+	}
+
+	/* Unload the SCI interrupt handler  */
+
+	acpi_ev_remove_sci_handler ();
+	acpi_ev_restore_acpi_state ();
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_enable_event
+ *
+ * PARAMETERS:  Event           - The fixed event or GPE to be enabled
+ *              Type            - The type of event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (fixed and general purpose)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_enable_event (
+	u32                     event,
+	u32                     type)
+{
+	ACPI_STATUS             status = AE_OK;
+	u32                     register_id;
+
+
+	/* The Type must be either Fixed Acpi_event or GPE */
+
+	switch (type)
+	{
+
+	case ACPI_EVENT_FIXED:
+
+		/* Decode the Fixed Acpi_event */
+
+		switch (event)
+		{
+		case ACPI_EVENT_PMTIMER:
+			register_id = TMR_EN;
+			break;
+
+		case ACPI_EVENT_GLOBAL:
+			register_id = GBL_EN;
+			break;
+
+		case ACPI_EVENT_POWER_BUTTON:
+			register_id = PWRBTN_EN;
+			break;
+
+		case ACPI_EVENT_SLEEP_BUTTON:
+			register_id = SLPBTN_EN;
+			break;
+
+		case ACPI_EVENT_RTC:
+			register_id = RTC_EN;
+			break;
+
+		default:
+			return (AE_BAD_PARAMETER);
+			break;
+		}
+
+		/*
+		 * Enable the requested fixed event (by writing a one to the
+		 * enable register bit)
+		 */
+
+		acpi_hw_register_access (ACPI_WRITE, TRUE, register_id, 1);
+		break;
+
+
+	case ACPI_EVENT_GPE:
+
+		/* Ensure that we have a valid GPE number */
+
+		if ((event >= NUM_GPE) ||
+			(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID))
+		{
+			return (AE_BAD_PARAMETER);
+		}
+
+
+		/* Enable the requested GPE number */
+
+		acpi_hw_enable_gpe (event);
+		break;
+
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+	}
+
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_disable_event
+ *
+ * PARAMETERS:  Event           - The fixed event or GPE to be enabled
+ *              Type            - The type of event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable an ACPI event (fixed and general purpose)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_disable_event (
+	u32                     event,
+	u32                     type)
+{
+	ACPI_STATUS             status = AE_OK;
+	u32                     register_id;
+
+
+	/* The Type must be either Fixed Acpi_event or GPE */
+
+	switch (type)
+	{
+
+	case ACPI_EVENT_FIXED:
+
+		/* Decode the Fixed Acpi_event */
+
+		switch (event)
+		{
+		case ACPI_EVENT_PMTIMER:
+			register_id = TMR_EN;
+			break;
+
+		case ACPI_EVENT_GLOBAL:
+			register_id = GBL_EN;
+			break;
+
+		case ACPI_EVENT_POWER_BUTTON:
+			register_id = PWRBTN_EN;
+			break;
+
+		case ACPI_EVENT_SLEEP_BUTTON:
+			register_id = SLPBTN_EN;
+			break;
+
+		case ACPI_EVENT_RTC:
+			register_id = RTC_EN;
+			break;
+
+		default:
+			return (AE_BAD_PARAMETER);
+			break;
+		}
+
+		/*
+		 * Disable the requested fixed event (by writing a zero to the
+		 * enable register bit)
+		 */
+
+		acpi_hw_register_access (ACPI_WRITE, TRUE, register_id, 0);
+		break;
+
+
+	case ACPI_EVENT_GPE:
+
+		/* Ensure that we have a valid GPE number */
+
+		if ((event >= NUM_GPE) ||
+			(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID))
+		{
+			return (AE_BAD_PARAMETER);
+		}
+
+		/* Disable the requested GPE number */
+
+		acpi_hw_disable_gpe (event);
+		break;
+
+
+	default:
+		status = AE_BAD_PARAMETER;
+	}
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_clear_event
+ *
+ * PARAMETERS:  Event           - The fixed event or GPE to be cleared
+ *              Type            - The type of event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear an ACPI event (fixed and general purpose)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_clear_event (
+	u32                     event,
+	u32                     type)
+{
+	ACPI_STATUS             status = AE_OK;
+	u32                     register_id;
+
+
+	/* The Type must be either Fixed Acpi_event or GPE */
+
+	switch (type)
+	{
+
+	case ACPI_EVENT_FIXED:
+
+		/* Decode the Fixed Acpi_event */
+
+		switch (event)
+		{
+		case ACPI_EVENT_PMTIMER:
+			register_id = TMR_STS;
+			break;
+
+		case ACPI_EVENT_GLOBAL:
+			register_id = GBL_STS;
+			break;
+
+		case ACPI_EVENT_POWER_BUTTON:
+			register_id = PWRBTN_STS;
+			break;
+
+		case ACPI_EVENT_SLEEP_BUTTON:
+			register_id = SLPBTN_STS;
+			break;
+
+		case ACPI_EVENT_RTC:
+			register_id = RTC_STS;
+			break;
+
+		default:
+			return (AE_BAD_PARAMETER);
+			break;
+		}
+
+		/*
+		 * Clear the requested fixed event (By writing a one to the
+		 * status register bit)
+		 */
+
+		acpi_hw_register_access (ACPI_WRITE, TRUE, register_id, 1);
+		break;
+
+
+	case ACPI_EVENT_GPE:
+
+		/* Ensure that we have a valid GPE number */
+
+		if ((event >= NUM_GPE) ||
+			(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID))
+		{
+			return (AE_BAD_PARAMETER);
+		}
+
+
+		acpi_hw_clear_gpe (event);
+		break;
+
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+	}
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_get_event_status
+ *
+ * PARAMETERS:  Event           - The fixed event or GPE
+ *              Type            - The type of event
+ *              Status          - Where the current status of the event will
+ *                                be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Obtains and returns the current status of the event
+ *
+ ******************************************************************************/
+
+
+ACPI_STATUS
+acpi_get_event_status (
+	u32                     event,
+	u32                     type,
+	ACPI_EVENT_STATUS       *event_status)
+{
+	ACPI_STATUS             status = AE_OK;
+	u32                     register_id;
+
+
+	if (!event_status) {
+		return (AE_BAD_PARAMETER);
+	}
+
+
+	/* The Type must be either Fixed Acpi_event or GPE */
+
+	switch (type)
+	{
+
+	case ACPI_EVENT_FIXED:
+
+		/* Decode the Fixed Acpi_event */
+
+		switch (event)
+		{
+		case ACPI_EVENT_PMTIMER:
+			register_id = TMR_STS;
+			break;
+
+		case ACPI_EVENT_GLOBAL:
+			register_id = GBL_STS;
+			break;
+
+		case ACPI_EVENT_POWER_BUTTON:
+			register_id = PWRBTN_STS;
+			break;
+
+		case ACPI_EVENT_SLEEP_BUTTON:
+			register_id = SLPBTN_STS;
+			break;
+
+		case ACPI_EVENT_RTC:
+			register_id = RTC_STS;
+			break;
+
+		default:
+			return (AE_BAD_PARAMETER);
+			break;
+		}
+
+		/* Get the status of the requested fixed event */
+
+		*event_status = acpi_hw_register_access (ACPI_READ, TRUE, register_id);
+		break;
+
+
+	case ACPI_EVENT_GPE:
+
+		/* Ensure that we have a valid GPE number */
+
+		if ((event >= NUM_GPE) ||
+			(acpi_gbl_gpe_valid[event] == ACPI_GPE_INVALID))
+		{
+			return (AE_BAD_PARAMETER);
+		}
+
+
+		/* Obtain status on the requested GPE number */
+
+		acpi_hw_get_gpe_status (event, event_status);
+		break;
+
+
+	default:
+		status = AE_BAD_PARAMETER;
+	}
+
+
+	return (status);
+}
+