[deliverable/linux.git] / drivers / acpi / events / evxfevnt.c

/******************************************************************************
 *
 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
 *
 *****************************************************************************/

/*
 * 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 <linux/module.h>

#include <acpi/acpi.h>
#include <acpi/acevents.h>
#include <acpi/acnamesp.h>

#define _COMPONENT          ACPI_EVENTS
	 ACPI_MODULE_NAME    ("evxfevnt")


/*******************************************************************************
 *
 * FUNCTION:    acpi_enable
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Transfers the system into ACPI mode.
 *
 ******************************************************************************/

acpi_status
acpi_enable (
	void)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("acpi_enable");


	/* Make sure we have the FADT*/

	if (!acpi_gbl_FADT) {
		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
	}

	if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
	}
	else {
		/* Transition to ACPI mode */

		status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
		if (ACPI_FAILURE (status)) {
			ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
			return_ACPI_STATUS (status);
		}

		ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
			"Transition to ACPI mode successful\n"));
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_disable
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
 *
 ******************************************************************************/

acpi_status
acpi_disable (
	void)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("acpi_disable");


	if (!acpi_gbl_FADT) {
		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
	}

	if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
		ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
			"System is already in legacy (non-ACPI) mode\n"));
	}
	else {
		/* Transition to LEGACY mode */

		status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY);

		if (ACPI_FAILURE (status)) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
				"Could not exit ACPI mode to legacy mode"));
			return_ACPI_STATUS (status);
		}

		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_enable_event
 *
 * PARAMETERS:  Event           - The fixed eventto be enabled
 *              Flags           - Reserved
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable an ACPI event (fixed)
 *
 ******************************************************************************/

acpi_status
acpi_enable_event (
	u32                             event,
	u32                             flags)
{
	acpi_status                     status = AE_OK;
	u32                             value;


	ACPI_FUNCTION_TRACE ("acpi_enable_event");


	/* Decode the Fixed Event */

	if (event > ACPI_EVENT_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	/*
	 * Enable the requested fixed event (by writing a one to the
	 * enable register bit)
	 */
	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
			 1, ACPI_MTX_LOCK);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/* Make sure that the hardware responded */

	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
			  &value, ACPI_MTX_LOCK);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	if (value != 1) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
			"Could not enable %s event\n", acpi_ut_get_event_name (event)));
		return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
	}

	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_enable_event);


/*******************************************************************************
 *
 * FUNCTION:    acpi_set_gpe_type
 *
 * PARAMETERS:  gpe_device      - Parent GPE Device
 *              gpe_number      - GPE level within the GPE block
 *              Type            - New GPE type
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Set the type of an individual GPE
 *
 ******************************************************************************/

acpi_status
acpi_set_gpe_type (
	acpi_handle                     gpe_device,
	u32                             gpe_number,
	u8                              type)
{
	acpi_status                     status = AE_OK;
	struct acpi_gpe_event_info      *gpe_event_info;


	ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");


	/* Ensure that we have a valid GPE number */

	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	if (!gpe_event_info) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
		return_ACPI_STATUS (AE_OK);
	}

	/* Set the new type (will disable GPE if currently enabled) */

	status = acpi_ev_set_gpe_type (gpe_event_info, type);

unlock_and_exit:
	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_set_gpe_type);


/*******************************************************************************
 *
 * FUNCTION:    acpi_enable_gpe
 *
 * PARAMETERS:  gpe_device      - Parent GPE Device
 *              gpe_number      - GPE level within the GPE block
 *              Flags           - Just enable, or also wake enable?
 *                                Called from ISR or not
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable an ACPI event (general purpose)
 *
 ******************************************************************************/

acpi_status
acpi_enable_gpe (
	acpi_handle                     gpe_device,
	u32                             gpe_number,
	u32                             flags)
{
	acpi_status                     status = AE_OK;
	struct acpi_gpe_event_info      *gpe_event_info;


	ACPI_FUNCTION_TRACE ("acpi_enable_gpe");


	/* Use semaphore lock if not executing at interrupt level */

	if (flags & ACPI_NOT_ISR) {
		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
		if (ACPI_FAILURE (status)) {
			return_ACPI_STATUS (status);
		}
	}

	/* Ensure that we have a valid GPE number */

	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	if (!gpe_event_info) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/* Perform the enable */

	status = acpi_ev_enable_gpe (gpe_event_info, TRUE);

unlock_and_exit:
	if (flags & ACPI_NOT_ISR) {
		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
	}
	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_enable_gpe);


/*******************************************************************************
 *
 * FUNCTION:    acpi_disable_gpe
 *
 * PARAMETERS:  gpe_device      - Parent GPE Device
 *              gpe_number      - GPE level within the GPE block
 *              Flags           - Just disable, or also wake disable?
 *                                Called from ISR or not
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Disable an ACPI event (general purpose)
 *
 ******************************************************************************/

acpi_status
acpi_disable_gpe (
	acpi_handle                     gpe_device,
	u32                             gpe_number,
	u32                             flags)
{
	acpi_status                     status = AE_OK;
	struct acpi_gpe_event_info      *gpe_event_info;


	ACPI_FUNCTION_TRACE ("acpi_disable_gpe");


	/* Use semaphore lock if not executing at interrupt level */

	if (flags & ACPI_NOT_ISR) {
		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
		if (ACPI_FAILURE (status)) {
			return_ACPI_STATUS (status);
		}
	}

	/* Ensure that we have a valid GPE number */

	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	if (!gpe_event_info) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	status = acpi_ev_disable_gpe (gpe_event_info);

unlock_and_exit:
	if (flags & ACPI_NOT_ISR) {
		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
	}
	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_disable_event
 *
 * PARAMETERS:  Event           - The fixed eventto be enabled
 *              Flags           - Reserved
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Disable an ACPI event (fixed)
 *
 ******************************************************************************/

acpi_status
acpi_disable_event (
	u32                             event,
	u32                             flags)
{
	acpi_status                     status = AE_OK;
	u32                             value;


	ACPI_FUNCTION_TRACE ("acpi_disable_event");


	/* Decode the Fixed Event */

	if (event > ACPI_EVENT_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	/*
	 * Disable the requested fixed event (by writing a zero to the
	 * enable register bit)
	 */
	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
			 0, ACPI_MTX_LOCK);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
			 &value, ACPI_MTX_LOCK);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	if (value != 0) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
			"Could not disable %s events\n", acpi_ut_get_event_name (event)));
		return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
	}

	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_disable_event);


/*******************************************************************************
 *
 * FUNCTION:    acpi_clear_event
 *
 * PARAMETERS:  Event           - The fixed event to be cleared
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Clear an ACPI event (fixed)
 *
 ******************************************************************************/

acpi_status
acpi_clear_event (
	u32                             event)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("acpi_clear_event");


	/* Decode the Fixed Event */

	if (event > ACPI_EVENT_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	/*
	 * Clear the requested fixed event (By writing a one to the
	 * status register bit)
	 */
	status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
			1, ACPI_MTX_LOCK);

	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_clear_event);


/*******************************************************************************
 *
 * FUNCTION:    acpi_clear_gpe
 *
 * PARAMETERS:  gpe_device      - Parent GPE Device
 *              gpe_number      - GPE level within the GPE block
 *              Flags           - Called from an ISR or not
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Clear an ACPI event (general purpose)
 *
 ******************************************************************************/

acpi_status
acpi_clear_gpe (
	acpi_handle                     gpe_device,
	u32                             gpe_number,
	u32                             flags)
{
	acpi_status                     status = AE_OK;
	struct acpi_gpe_event_info      *gpe_event_info;


	ACPI_FUNCTION_TRACE ("acpi_clear_gpe");


	/* Use semaphore lock if not executing at interrupt level */

	if (flags & ACPI_NOT_ISR) {
		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
		if (ACPI_FAILURE (status)) {
			return_ACPI_STATUS (status);
		}
	}

	/* Ensure that we have a valid GPE number */

	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	if (!gpe_event_info) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	status = acpi_hw_clear_gpe (gpe_event_info);

unlock_and_exit:
	if (flags & ACPI_NOT_ISR) {
		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
	}
	return_ACPI_STATUS (status);
}


#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
 *
 * FUNCTION:    acpi_get_event_status
 *
 * PARAMETERS:  Event           - The fixed event
 *              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,
	acpi_event_status               *event_status)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("acpi_get_event_status");


	if (!event_status) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	/* Decode the Fixed Event */

	if (event > ACPI_EVENT_MAX) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	/* Get the status of the requested fixed event */

	status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
			  event_status, ACPI_MTX_LOCK);

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_get_gpe_status
 *
 * PARAMETERS:  gpe_device      - Parent GPE Device
 *              gpe_number      - GPE level within the GPE block
 *              Flags           - Called from an ISR or not
 *              event_status    - Where the current status of the event will
 *                                be returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Get status of an event (general purpose)
 *
 ******************************************************************************/

acpi_status
acpi_get_gpe_status (
	acpi_handle                     gpe_device,
	u32                             gpe_number,
	u32                             flags,
	acpi_event_status               *event_status)
{
	acpi_status                     status = AE_OK;
	struct acpi_gpe_event_info      *gpe_event_info;


	ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");


	/* Use semaphore lock if not executing at interrupt level */

	if (flags & ACPI_NOT_ISR) {
		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
		if (ACPI_FAILURE (status)) {
			return_ACPI_STATUS (status);
		}
	}

	/* Ensure that we have a valid GPE number */

	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	if (!gpe_event_info) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/* Obtain status on the requested GPE number */

	status = acpi_hw_get_gpe_status (gpe_event_info, event_status);

unlock_and_exit:
	if (flags & ACPI_NOT_ISR) {
		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
	}
	return_ACPI_STATUS (status);
}
#endif  /*  ACPI_FUTURE_USAGE  */


/*******************************************************************************
 *
 * FUNCTION:    acpi_install_gpe_block
 *
 * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
 *              gpe_block_address   - Address and space_iD
 *              register_count      - Number of GPE register pairs in the block
 *              interrupt_level     - H/W interrupt for the block
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create and Install a block of GPE registers
 *
 ******************************************************************************/

acpi_status
acpi_install_gpe_block (
	acpi_handle                     gpe_device,
	struct acpi_generic_address     *gpe_block_address,
	u32                             register_count,
	u32                             interrupt_level)
{
	acpi_status                     status;
	union acpi_operand_object       *obj_desc;
	struct acpi_namespace_node      *node;
	struct acpi_gpe_block_info      *gpe_block;


	ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");


	if ((!gpe_device)      ||
		(!gpe_block_address) ||
		(!register_count)) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	node = acpi_ns_map_handle_to_node (gpe_device);
	if (!node) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/*
	 * For user-installed GPE Block Devices, the gpe_block_base_number
	 * is always zero
	 */
	status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
			  0, interrupt_level, &gpe_block);
	if (ACPI_FAILURE (status)) {
		goto unlock_and_exit;
	}

	/* Get the device_object attached to the node */

	obj_desc = acpi_ns_get_attached_object (node);
	if (!obj_desc) {
		/* No object, create a new one */

		obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
		if (!obj_desc) {
			status = AE_NO_MEMORY;
			goto unlock_and_exit;
		}

		status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);

		/* Remove local reference to the object */

		acpi_ut_remove_reference (obj_desc);

		if (ACPI_FAILURE (status)) {
			goto unlock_and_exit;
		}
	}

	/* Install the GPE block in the device_object */

	obj_desc->device.gpe_block = gpe_block;


unlock_and_exit:
	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
	return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_install_gpe_block);


/*******************************************************************************
 *
 * FUNCTION:    acpi_remove_gpe_block
 *
 * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Remove a previously installed block of GPE registers
 *
 ******************************************************************************/

acpi_status
acpi_remove_gpe_block (
	acpi_handle                     gpe_device)
{
	union acpi_operand_object       *obj_desc;
	acpi_status                     status;
	struct acpi_namespace_node      *node;


	ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");


	if (!gpe_device) {
		return_ACPI_STATUS (AE_BAD_PARAMETER);
	}

	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	node = acpi_ns_map_handle_to_node (gpe_device);
	if (!node) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/* Get the device_object attached to the node */

	obj_desc = acpi_ns_get_attached_object (node);
	if (!obj_desc ||
		!obj_desc->device.gpe_block) {
		return_ACPI_STATUS (AE_NULL_OBJECT);
	}

	/* Delete the GPE block (but not the device_object) */

	status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
	if (ACPI_SUCCESS (status)) {
		obj_desc->device.gpe_block = NULL;
	}

unlock_and_exit:
	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
	return_ACPI_STATUS (status);
}

EXPORT_SYMBOL(acpi_remove_gpe_block);
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	*
	3	* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
	4	*
	5	*****************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
	44	#include <linux/module.h>
	45
	46	#include <acpi/acpi.h>
	47	#include <acpi/acevents.h>
	48	#include <acpi/acnamesp.h>
	49
	50	#define _COMPONENT ACPI_EVENTS
	51	ACPI_MODULE_NAME ("evxfevnt")
	52
	53
	54	/*******************************************************************************
	55	*
	56	* FUNCTION: acpi_enable
	57	*
	58	* PARAMETERS: None
	59	*
	60	* RETURN: Status
	61	*
	62	* DESCRIPTION: Transfers the system into ACPI mode.
	63	*
	64	******************************************************************************/
65
66	acpi_status
44f6c012 RM	67	acpi_enable (
44f6c012 RM	68	void)
1da177e4 LT	69	{
	70	acpi_status status = AE_OK;
	71
	72
	73	ACPI_FUNCTION_TRACE ("acpi_enable");
	74
	75
	76	/* Make sure we have the FADT*/
	77
	78	if (!acpi_gbl_FADT) {
	79	ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
	80	return_ACPI_STATUS (AE_NO_ACPI_TABLES);
	81	}
	82
	83	if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
	84	ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
	85	}
	86	else {
	87	/* Transition to ACPI mode */
	88
	89	status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
	90	if (ACPI_FAILURE (status)) {
	91	ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
	92	return_ACPI_STATUS (status);
	93	}
	94
44f6c012 RM	95	ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
44f6c012 RM	96	"Transition to ACPI mode successful\n"));
1da177e4 LT	97	}
	98
	99	return_ACPI_STATUS (status);
	100	}
	101
	102
	103	/*******************************************************************************
	104	*
	105	* FUNCTION: acpi_disable
	106	*
	107	* PARAMETERS: None
	108	*
	109	* RETURN: Status
	110	*
44f6c012	111	* DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
1da177e4 LT	112	*
	113	******************************************************************************/
	114
	115	acpi_status
44f6c012 RM	116	acpi_disable (
44f6c012 RM	117	void)
1da177e4 LT	118	{
	119	acpi_status status = AE_OK;
	120
	121
	122	ACPI_FUNCTION_TRACE ("acpi_disable");
	123
	124
	125	if (!acpi_gbl_FADT) {
	126	ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
	127	return_ACPI_STATUS (AE_NO_ACPI_TABLES);
	128	}
	129
	130	if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
44f6c012 RM	131	ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
44f6c012 RM	132	"System is already in legacy (non-ACPI) mode\n"));
1da177e4 LT	133	}
	134	else {
	135	/* Transition to LEGACY mode */
	136
	137	status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY);
	138
	139	if (ACPI_FAILURE (status)) {
44f6c012 RM	140	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
44f6c012 RM	141	"Could not exit ACPI mode to legacy mode"));
1da177e4 LT	142	return_ACPI_STATUS (status);
	143	}
	144
	145	ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
	146	}
	147
	148	return_ACPI_STATUS (status);
	149	}
	150
	151
	152	/*******************************************************************************
	153	*
	154	* FUNCTION: acpi_enable_event
	155	*
	156	* PARAMETERS: Event - The fixed eventto be enabled
	157	* Flags - Reserved
	158	*
	159	* RETURN: Status
	160	*
	161	* DESCRIPTION: Enable an ACPI event (fixed)
	162	*
	163	******************************************************************************/
	164
	165	acpi_status
	166	acpi_enable_event (
	167	u32 event,
	168	u32 flags)
	169	{
	170	acpi_status status = AE_OK;
	171	u32 value;
	172
	173
	174	ACPI_FUNCTION_TRACE ("acpi_enable_event");
	175
	176
	177	/* Decode the Fixed Event */
	178
	179	if (event > ACPI_EVENT_MAX) {
	180	return_ACPI_STATUS (AE_BAD_PARAMETER);
	181	}
	182
	183	/*
	184	* Enable the requested fixed event (by writing a one to the
	185	* enable register bit)
	186	*/
	187	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
	188	1, ACPI_MTX_LOCK);
	189	if (ACPI_FAILURE (status)) {
	190	return_ACPI_STATUS (status);
	191	}
	192
	193	/* Make sure that the hardware responded */
	194
	195	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
	196	&value, ACPI_MTX_LOCK);
	197	if (ACPI_FAILURE (status)) {
	198	return_ACPI_STATUS (status);
	199	}
	200
	201	if (value != 1) {
	202	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
	203	"Could not enable %s event\n", acpi_ut_get_event_name (event)));
	204	return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
	205	}
206
207	return_ACPI_STATUS (status);
208	}
209	EXPORT_SYMBOL(acpi_enable_event);
210
211
212	/*******************************************************************************
213	*
214	* FUNCTION: acpi_set_gpe_type
215	*
216	* PARAMETERS: gpe_device - Parent GPE Device
217	* gpe_number - GPE level within the GPE block
218	* Type - New GPE type
219	*
220	* RETURN: Status
221	*
44f6c012	222	* DESCRIPTION: Set the type of an individual GPE
1da177e4 LT	223	*
	224	******************************************************************************/
	225
	226	acpi_status
	227	acpi_set_gpe_type (
	228	acpi_handle gpe_device,
	229	u32 gpe_number,
	230	u8 type)
	231	{
	232	acpi_status status = AE_OK;
	233	struct acpi_gpe_event_info *gpe_event_info;
	234
	235
	236	ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");
	237
	238
	239	/* Ensure that we have a valid GPE number */
	240
	241	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	242	if (!gpe_event_info) {
	243	status = AE_BAD_PARAMETER;
	244	goto unlock_and_exit;
	245	}
	246
	247	if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
	248	return_ACPI_STATUS (AE_OK);
	249	}
	250
	251	/* Set the new type (will disable GPE if currently enabled) */
	252
	253	status = acpi_ev_set_gpe_type (gpe_event_info, type);
	254
	255	unlock_and_exit:
	256	return_ACPI_STATUS (status);
	257	}
	258	EXPORT_SYMBOL(acpi_set_gpe_type);
	259
	260
	261	/*******************************************************************************
	262	*
	263	* FUNCTION: acpi_enable_gpe
	264	*
	265	* PARAMETERS: gpe_device - Parent GPE Device
	266	* gpe_number - GPE level within the GPE block
	267	* Flags - Just enable, or also wake enable?
	268	* Called from ISR or not
	269	*
	270	* RETURN: Status
	271	*
	272	* DESCRIPTION: Enable an ACPI event (general purpose)
	273	*
	274	******************************************************************************/
	275
	276	acpi_status
	277	acpi_enable_gpe (
	278	acpi_handle gpe_device,
	279	u32 gpe_number,
	280	u32 flags)
	281	{
	282	acpi_status status = AE_OK;
	283	struct acpi_gpe_event_info *gpe_event_info;
	284
	285
	286	ACPI_FUNCTION_TRACE ("acpi_enable_gpe");
287
288
289	/* Use semaphore lock if not executing at interrupt level */
290
291	if (flags & ACPI_NOT_ISR) {
292	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
293	if (ACPI_FAILURE (status)) {
294	return_ACPI_STATUS (status);
295	}
296	}
297
298	/* Ensure that we have a valid GPE number */
299
300	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
301	if (!gpe_event_info) {
302	status = AE_BAD_PARAMETER;
303	goto unlock_and_exit;
304	}
305
306	/* Perform the enable */
307
308	status = acpi_ev_enable_gpe (gpe_event_info, TRUE);
309
310	unlock_and_exit:
311	if (flags & ACPI_NOT_ISR) {
312	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
313	}
314	return_ACPI_STATUS (status);
315	}
316	EXPORT_SYMBOL(acpi_enable_gpe);
317
318
319	/*******************************************************************************
320	*
321	* FUNCTION: acpi_disable_gpe
322	*
323	* PARAMETERS: gpe_device - Parent GPE Device
324	* gpe_number - GPE level within the GPE block
325	* Flags - Just disable, or also wake disable?
326	* Called from ISR or not
327	*
328	* RETURN: Status
329	*
330	* DESCRIPTION: Disable an ACPI event (general purpose)
331	*
332	******************************************************************************/
333
334	acpi_status
335	acpi_disable_gpe (
336	acpi_handle gpe_device,
337	u32 gpe_number,
338	u32 flags)
339	{
340	acpi_status status = AE_OK;
341	struct acpi_gpe_event_info *gpe_event_info;
342
343
344	ACPI_FUNCTION_TRACE ("acpi_disable_gpe");
345
346
347	/* Use semaphore lock if not executing at interrupt level */
348
349	if (flags & ACPI_NOT_ISR) {
350	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
351	if (ACPI_FAILURE (status)) {
352	return_ACPI_STATUS (status);
353	}
354	}
355
356	/* Ensure that we have a valid GPE number */
357
358	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
359	if (!gpe_event_info) {
360	status = AE_BAD_PARAMETER;
361	goto unlock_and_exit;
362	}
363
364	status = acpi_ev_disable_gpe (gpe_event_info);
365
366	unlock_and_exit:
367	if (flags & ACPI_NOT_ISR) {
368	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
369	}
370	return_ACPI_STATUS (status);
371	}
372
373
374	/*******************************************************************************
375	*
376	* FUNCTION: acpi_disable_event
377	*
378	* PARAMETERS: Event - The fixed eventto be enabled
379	* Flags - Reserved
380	*
381	* RETURN: Status
382	*
383	* DESCRIPTION: Disable an ACPI event (fixed)
384	*
385	******************************************************************************/
386
387	acpi_status
388	acpi_disable_event (
389	u32 event,
390	u32 flags)
391	{
392	acpi_status status = AE_OK;
393	u32 value;
394
395
396	ACPI_FUNCTION_TRACE ("acpi_disable_event");
397
398
399	/* Decode the Fixed Event */
400
401	if (event > ACPI_EVENT_MAX) {
402	return_ACPI_STATUS (AE_BAD_PARAMETER);
403	}
404
405	/*
406	* Disable the requested fixed event (by writing a zero to the
407	* enable register bit)
408	*/
409	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
410	0, ACPI_MTX_LOCK);
411	if (ACPI_FAILURE (status)) {
412	return_ACPI_STATUS (status);
413	}
414
415	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
416	&value, ACPI_MTX_LOCK);
417	if (ACPI_FAILURE (status)) {
418	return_ACPI_STATUS (status);
419	}
420
421	if (value != 0) {
422	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
423	"Could not disable %s events\n", acpi_ut_get_event_name (event)));
424	return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
425	}
426
427	return_ACPI_STATUS (status);
428	}
429	EXPORT_SYMBOL(acpi_disable_event);
430
431
432	/*******************************************************************************
433	*
434	* FUNCTION: acpi_clear_event
435	*
436	* PARAMETERS: Event - The fixed event to be cleared
437	*
438	* RETURN: Status
439	*
440	* DESCRIPTION: Clear an ACPI event (fixed)
441	*
442	******************************************************************************/
443
444	acpi_status
445	acpi_clear_event (
446	u32 event)
447	{
448	acpi_status status = AE_OK;
449
450
451	ACPI_FUNCTION_TRACE ("acpi_clear_event");
452
453
454	/* Decode the Fixed Event */
455
456	if (event > ACPI_EVENT_MAX) {
457	return_ACPI_STATUS (AE_BAD_PARAMETER);
458	}
459
460	/*
461	* Clear the requested fixed event (By writing a one to the
462	* status register bit)
463	*/
464	status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
465	1, ACPI_MTX_LOCK);
466
467	return_ACPI_STATUS (status);
468	}
469	EXPORT_SYMBOL(acpi_clear_event);
470
471
472	/*******************************************************************************
473	*
474	* FUNCTION: acpi_clear_gpe
475	*
476	* PARAMETERS: gpe_device - Parent GPE Device
477	* gpe_number - GPE level within the GPE block
478	* Flags - Called from an ISR or not
479	*
480	* RETURN: Status
481	*
482	* DESCRIPTION: Clear an ACPI event (general purpose)
483	*
484	******************************************************************************/
485
486	acpi_status
487	acpi_clear_gpe (
488	acpi_handle gpe_device,
489	u32 gpe_number,
490	u32 flags)
491	{
492	acpi_status status = AE_OK;
493	struct acpi_gpe_event_info *gpe_event_info;
494
495
496	ACPI_FUNCTION_TRACE ("acpi_clear_gpe");
497
498
499	/* Use semaphore lock if not executing at interrupt level */
500
501	if (flags & ACPI_NOT_ISR) {
502	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
503	if (ACPI_FAILURE (status)) {
504	return_ACPI_STATUS (status);
505	}
506	}
507
508	/* Ensure that we have a valid GPE number */
509
510	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
511	if (!gpe_event_info) {
512	status = AE_BAD_PARAMETER;
513	goto unlock_and_exit;
514	}
515
516	status = acpi_hw_clear_gpe (gpe_event_info);
517
518	unlock_and_exit:
519	if (flags & ACPI_NOT_ISR) {
520	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
521	}
522	return_ACPI_STATUS (status);
523	}
524
525
526	#ifdef ACPI_FUTURE_USAGE
1da177e4 LT	527	/*******************************************************************************
	528	*
	529	* FUNCTION: acpi_get_event_status
	530	*
	531	* PARAMETERS: Event - The fixed event
44f6c012	532	* event_status - Where the current status of the event will
1da177e4 LT	533	* be returned
	534	*
	535	* RETURN: Status
	536	*
	537	* DESCRIPTION: Obtains and returns the current status of the event
	538	*
	539	******************************************************************************/
	540
	541	acpi_status
	542	acpi_get_event_status (
	543	u32 event,
	544	acpi_event_status *event_status)
	545	{
	546	acpi_status status = AE_OK;
	547
	548
	549	ACPI_FUNCTION_TRACE ("acpi_get_event_status");
	550
	551
	552	if (!event_status) {
	553	return_ACPI_STATUS (AE_BAD_PARAMETER);
	554	}
	555
	556	/* Decode the Fixed Event */
	557
	558	if (event > ACPI_EVENT_MAX) {
	559	return_ACPI_STATUS (AE_BAD_PARAMETER);
	560	}
	561
	562	/* Get the status of the requested fixed event */
	563
	564	status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
	565	event_status, ACPI_MTX_LOCK);
	566
	567	return_ACPI_STATUS (status);
	568	}
	569
	570
	571	/*******************************************************************************
	572	*
	573	* FUNCTION: acpi_get_gpe_status
	574	*
	575	* PARAMETERS: gpe_device - Parent GPE Device
	576	* gpe_number - GPE level within the GPE block
	577	* Flags - Called from an ISR or not
44f6c012	578	* event_status - Where the current status of the event will
1da177e4 LT	579	* be returned
	580	*
	581	* RETURN: Status
	582	*
	583	* DESCRIPTION: Get status of an event (general purpose)
	584	*
	585	******************************************************************************/
	586
	587	acpi_status
	588	acpi_get_gpe_status (
	589	acpi_handle gpe_device,
	590	u32 gpe_number,
	591	u32 flags,
	592	acpi_event_status *event_status)
	593	{
	594	acpi_status status = AE_OK;
	595	struct acpi_gpe_event_info *gpe_event_info;
	596
	597
	598	ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");
	599
	600
	601	/* Use semaphore lock if not executing at interrupt level */
	602
	603	if (flags & ACPI_NOT_ISR) {
	604	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
	605	if (ACPI_FAILURE (status)) {
	606	return_ACPI_STATUS (status);
	607	}
	608	}
	609
	610	/* Ensure that we have a valid GPE number */
	611
	612	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
	613	if (!gpe_event_info) {
	614	status = AE_BAD_PARAMETER;
	615	goto unlock_and_exit;
	616	}
	617
	618	/* Obtain status on the requested GPE number */
	619
	620	status = acpi_hw_get_gpe_status (gpe_event_info, event_status);
	621
	622	unlock_and_exit:
	623	if (flags & ACPI_NOT_ISR) {
	624	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
	625	}
	626	return_ACPI_STATUS (status);
	627	}
	628	#endif /* ACPI_FUTURE_USAGE */
	629
	630
	631	/*******************************************************************************
	632	*
	633	* FUNCTION: acpi_install_gpe_block
	634	*
	635	* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
	636	* gpe_block_address - Address and space_iD
	637	* register_count - Number of GPE register pairs in the block
	638	* interrupt_level - H/W interrupt for the block
	639	*
	640	* RETURN: Status
	641	*
	642	* DESCRIPTION: Create and Install a block of GPE registers
643	*
644	******************************************************************************/
645
646	acpi_status
647	acpi_install_gpe_block (
648	acpi_handle gpe_device,
649	struct acpi_generic_address *gpe_block_address,
650	u32 register_count,
651	u32 interrupt_level)
652	{
653	acpi_status status;
654	union acpi_operand_object *obj_desc;
655	struct acpi_namespace_node *node;
656	struct acpi_gpe_block_info *gpe_block;
657
658
659	ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");
660
661
662	if ((!gpe_device) \|\|
663	(!gpe_block_address) \|\|
664	(!register_count)) {
665	return_ACPI_STATUS (AE_BAD_PARAMETER);
666	}
667
668	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
669	if (ACPI_FAILURE (status)) {
670	return (status);
671	}
672
673	node = acpi_ns_map_handle_to_node (gpe_device);
674	if (!node) {
675	status = AE_BAD_PARAMETER;
676	goto unlock_and_exit;
677	}
678
679	/*
680	* For user-installed GPE Block Devices, the gpe_block_base_number
681	* is always zero
682	*/
683	status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
684	0, interrupt_level, &gpe_block);
685	if (ACPI_FAILURE (status)) {
686	goto unlock_and_exit;
687	}
688
689	/* Get the device_object attached to the node */
690
691	obj_desc = acpi_ns_get_attached_object (node);
692	if (!obj_desc) {
693	/* No object, create a new one */
694
695	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
696	if (!obj_desc) {
697	status = AE_NO_MEMORY;
698	goto unlock_and_exit;
699	}
700
701	status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);
702
703	/* Remove local reference to the object */
704
705	acpi_ut_remove_reference (obj_desc);
706
707	if (ACPI_FAILURE (status)) {
708	goto unlock_and_exit;
709	}
710	}
711
712	/* Install the GPE block in the device_object */
713
714	obj_desc->device.gpe_block = gpe_block;
715
716
717	unlock_and_exit:
718	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
719	return_ACPI_STATUS (status);
720	}
721	EXPORT_SYMBOL(acpi_install_gpe_block);
722
723
724	/*******************************************************************************
725	*
726	* FUNCTION: acpi_remove_gpe_block
727	*
728	* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
729	*
730	* RETURN: Status
731	*
732	* DESCRIPTION: Remove a previously installed block of GPE registers
733	*
734	******************************************************************************/
735
736	acpi_status
737	acpi_remove_gpe_block (
738	acpi_handle gpe_device)
739	{
740	union acpi_operand_object *obj_desc;
741	acpi_status status;
742	struct acpi_namespace_node *node;
743
744
745	ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");
746
747
748	if (!gpe_device) {
749	return_ACPI_STATUS (AE_BAD_PARAMETER);
750	}
751
752	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
753	if (ACPI_FAILURE (status)) {
754	return (status);
755	}
756
757	node = acpi_ns_map_handle_to_node (gpe_device);
758	if (!node) {
759	status = AE_BAD_PARAMETER;
760	goto unlock_and_exit;
761	}
762
763	/* Get the device_object attached to the node */
764
765	obj_desc = acpi_ns_get_attached_object (node);
766	if (!obj_desc \|\|
767	!obj_desc->device.gpe_block) {
768	return_ACPI_STATUS (AE_NULL_OBJECT);
769	}
770
771	/* Delete the GPE block (but not the device_object) */
772
773	status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
774	if (ACPI_SUCCESS (status)) {
775	obj_desc->device.gpe_block = NULL;
776	}
777
778	unlock_and_exit:
779	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
780	return_ACPI_STATUS (status);
781	}
44f6c012	782
1da177e4	783	EXPORT_SYMBOL(acpi_remove_gpe_block);