[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / hardware / hwsleep.c


/******************************************************************************
 *
 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2006, 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/actables.h>

#define _COMPONENT          ACPI_HARDWARE
ACPI_MODULE_NAME("hwsleep")

/*******************************************************************************
 *
 * FUNCTION:    acpi_set_firmware_waking_vector
 *
 * PARAMETERS:  physical_address    - Physical address of ACPI real mode
 *                                    entry point.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
 *
 ******************************************************************************/
acpi_status
acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
{
	struct acpi_table_facs *facs;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);

	/* Get the FACS */

	status =
	    acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
				    (struct acpi_table_header **)&facs);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Set the vector */

	if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
		/*
		 * ACPI 1.0 FACS or short table or optional X_ field is zero
		 */
		facs->firmware_waking_vector = (u32) physical_address;
	} else {
		/*
		 * ACPI 2.0 FACS with valid X_ field
		 */
		facs->xfirmware_waking_vector = physical_address;
	}

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_firmware_waking_vector
 *
 * PARAMETERS:  *physical_address   - Where the contents of
 *                                    the firmware_waking_vector field of
 *                                    the FACS will be returned.
 *
 * RETURN:      Status, vector
 *
 * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
 *
 ******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
{
	struct acpi_table_facs *facs;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector);

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

	/* Get the FACS */

	status =
	    acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
				    (struct acpi_table_header **)&facs);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Get the vector */

	if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
		/*
		 * ACPI 1.0 FACS or short table or optional X_ field is zero
		 */
		*physical_address =
		    (acpi_physical_address) facs->firmware_waking_vector;
	} else {
		/*
		 * ACPI 2.0 FACS with valid X_ field
		 */
		*physical_address =
		    (acpi_physical_address) facs->xfirmware_waking_vector;
	}

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector)
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_enter_sleep_state_prep
 *
 * PARAMETERS:  sleep_state         - Which sleep state to enter
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
 *              This function must execute with interrupts enabled.
 *              We break sleeping into 2 stages so that OSPM can handle
 *              various OS-specific tasks between the two steps.
 *
 ******************************************************************************/
acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
{
	acpi_status status;
	struct acpi_object_list arg_list;
	union acpi_object arg;

	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);

	/*
	 * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
	 */
	status = acpi_get_sleep_type_data(sleep_state,
					  &acpi_gbl_sleep_type_a,
					  &acpi_gbl_sleep_type_b);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Setup parameter object */

	arg_list.count = 1;
	arg_list.pointer = &arg;

	arg.type = ACPI_TYPE_INTEGER;
	arg.integer.value = sleep_state;

	/* Run the _PTS and _GTS methods */

	status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		return_ACPI_STATUS(status);
	}

	status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		return_ACPI_STATUS(status);
	}

	/* Setup the argument to _SST */

	switch (sleep_state) {
	case ACPI_STATE_S0:
		arg.integer.value = ACPI_SST_WORKING;
		break;

	case ACPI_STATE_S1:
	case ACPI_STATE_S2:
	case ACPI_STATE_S3:
		arg.integer.value = ACPI_SST_SLEEPING;
		break;

	case ACPI_STATE_S4:
		arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
		break;

	default:
		arg.integer.value = ACPI_SST_INDICATOR_OFF;	/* Default is off */
		break;
	}

	/* Set the system indicators to show the desired sleep state. */

	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		ACPI_EXCEPTION((AE_INFO, status,
				"While executing method _SST"));
	}

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)

/*******************************************************************************
 *
 * FUNCTION:    acpi_enter_sleep_state
 *
 * PARAMETERS:  sleep_state         - Which sleep state to enter
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
 *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 *
 ******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
{
	u32 PM1Acontrol;
	u32 PM1Bcontrol;
	struct acpi_bit_register_info *sleep_type_reg_info;
	struct acpi_bit_register_info *sleep_enable_reg_info;
	u32 in_value;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);

	if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
	    (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
		ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
			    acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
	}

	sleep_type_reg_info =
	    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
	sleep_enable_reg_info =
	    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);

	/* Clear wake status */

	status =
	    acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Clear all fixed and general purpose status bits */

	status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * 1) Disable/Clear all GPEs
	 * 2) Enable all wakeup GPEs
	 */
	status = acpi_hw_disable_all_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}
	acpi_gbl_system_awake_and_running = FALSE;

	status = acpi_hw_enable_all_wakeup_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Get current value of PM1A control */

	status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
				       ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}
	ACPI_DEBUG_PRINT((ACPI_DB_INIT,
			  "Entering sleep state [S%d]\n", sleep_state));

	/* Clear SLP_EN and SLP_TYP fields */

	PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
			 sleep_enable_reg_info->access_bit_mask);
	PM1Bcontrol = PM1Acontrol;

	/* Insert SLP_TYP bits */

	PM1Acontrol |=
	    (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
	PM1Bcontrol |=
	    (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);

	/*
	 * We split the writes of SLP_TYP and SLP_EN to workaround
	 * poorly implemented hardware.
	 */

	/* Write #1: fill in SLP_TYP data */

	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
					ACPI_REGISTER_PM1A_CONTROL,
					PM1Acontrol);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
					ACPI_REGISTER_PM1B_CONTROL,
					PM1Bcontrol);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Insert SLP_ENABLE bit */

	PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
	PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;

	/* Write #2: SLP_TYP + SLP_EN */

	ACPI_FLUSH_CPU_CACHE();

	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
					ACPI_REGISTER_PM1A_CONTROL,
					PM1Acontrol);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
					ACPI_REGISTER_PM1B_CONTROL,
					PM1Bcontrol);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (sleep_state > ACPI_STATE_S3) {
		/*
		 * We wanted to sleep > S3, but it didn't happen (by virtue of the
		 * fact that we are still executing!)
		 *
		 * Wait ten seconds, then try again. This is to get S4/S5 to work on
		 * all machines.
		 *
		 * We wait so long to allow chipsets that poll this reg very slowly to
		 * still read the right value. Ideally, this block would go
		 * away entirely.
		 */
		acpi_os_stall(10000000);

		status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
						ACPI_REGISTER_PM1_CONTROL,
						sleep_enable_reg_info->
						access_bit_mask);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}
	}

	/* Wait until we enter sleep state */

	do {
		status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
					   ACPI_MTX_DO_NOT_LOCK);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Spin until we wake */

	} while (!in_value);

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)

/*******************************************************************************
 *
 * FUNCTION:    acpi_enter_sleep_state_s4bios
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform a S4 bios request.
 *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 *
 ******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
{
	u32 in_value;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);

	status =
	    acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * 1) Disable/Clear all GPEs
	 * 2) Enable all wakeup GPEs
	 */
	status = acpi_hw_disable_all_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}
	acpi_gbl_system_awake_and_running = FALSE;

	status = acpi_hw_enable_all_wakeup_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	ACPI_FLUSH_CPU_CACHE();

	status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
				    (u32) acpi_gbl_FADT.S4bios_request, 8);

	do {
		acpi_os_stall(1000);
		status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
					   ACPI_MTX_DO_NOT_LOCK);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}
	} while (!in_value);

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)

/*******************************************************************************
 *
 * FUNCTION:    acpi_leave_sleep_state
 *
 * PARAMETERS:  sleep_state         - Which sleep state we just exited
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
 *              Called with interrupts ENABLED.
 *
 ******************************************************************************/
acpi_status acpi_leave_sleep_state(u8 sleep_state)
{
	struct acpi_object_list arg_list;
	union acpi_object arg;
	acpi_status status;
	struct acpi_bit_register_info *sleep_type_reg_info;
	struct acpi_bit_register_info *sleep_enable_reg_info;
	u32 PM1Acontrol;
	u32 PM1Bcontrol;

	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);

	/*
	 * Set SLP_TYPE and SLP_EN to state S0.
	 * This is unclear from the ACPI Spec, but it is required
	 * by some machines.
	 */
	status = acpi_get_sleep_type_data(ACPI_STATE_S0,
					  &acpi_gbl_sleep_type_a,
					  &acpi_gbl_sleep_type_b);
	if (ACPI_SUCCESS(status)) {
		sleep_type_reg_info =
		    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
		sleep_enable_reg_info =
		    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);

		/* Get current value of PM1A control */

		status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
					       ACPI_REGISTER_PM1_CONTROL,
					       &PM1Acontrol);
		if (ACPI_SUCCESS(status)) {

			/* Clear SLP_EN and SLP_TYP fields */

			PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
					 sleep_enable_reg_info->
					 access_bit_mask);
			PM1Bcontrol = PM1Acontrol;

			/* Insert SLP_TYP bits */

			PM1Acontrol |=
			    (acpi_gbl_sleep_type_a << sleep_type_reg_info->
			     bit_position);
			PM1Bcontrol |=
			    (acpi_gbl_sleep_type_b << sleep_type_reg_info->
			     bit_position);

			/* Just ignore any errors */

			(void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
						     ACPI_REGISTER_PM1A_CONTROL,
						     PM1Acontrol);
			(void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
						     ACPI_REGISTER_PM1B_CONTROL,
						     PM1Bcontrol);
		}
	}

	/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */

	acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;

	/* Setup parameter object */

	arg_list.count = 1;
	arg_list.pointer = &arg;
	arg.type = ACPI_TYPE_INTEGER;

	/* Ignore any errors from these methods */

	arg.integer.value = ACPI_SST_WAKING;
	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
	}

	arg.integer.value = sleep_state;
	status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
	}

	status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
	}
	/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */

	/*
	 * Restore the GPEs:
	 * 1) Disable/Clear all GPEs
	 * 2) Enable all runtime GPEs
	 */
	status = acpi_hw_disable_all_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}
	acpi_gbl_system_awake_and_running = TRUE;

	status = acpi_hw_enable_all_runtime_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Enable power button */

	(void)
	    acpi_set_register(acpi_gbl_fixed_event_info
			      [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1,
			      ACPI_MTX_DO_NOT_LOCK);

	(void)
	    acpi_set_register(acpi_gbl_fixed_event_info
			      [ACPI_EVENT_POWER_BUTTON].status_register_id, 1,
			      ACPI_MTX_DO_NOT_LOCK);

	arg.integer.value = ACPI_SST_WORKING;
	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
		ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
	}

	return_ACPI_STATUS(status);
}

ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
Commit	Line	Data
1da177e4 LT	1
	2	/******************************************************************************
	3	*
	4	* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
	5	*
	6	*****************************************************************************/
	7
	8	/*
4a90c7e8	9	* Copyright (C) 2000 - 2006, R. Byron Moore
1da177e4 LT	10	* All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions, and the following disclaimer,
	17	* without modification.
	18	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	19	* substantially similar to the "NO WARRANTY" disclaimer below
	20	* ("Disclaimer") and any redistribution must be conditioned upon
	21	* including a substantially similar Disclaimer requirement for further
	22	* binary redistribution.
	23	* 3. Neither the names of the above-listed copyright holders nor the names
	24	* of any contributors may be used to endorse or promote products derived
	25	* from this software without specific prior written permission.
	26	*
	27	* Alternatively, this software may be distributed under the terms of the
	28	* GNU General Public License ("GPL") version 2 as published by the Free
	29	* Software Foundation.
	30	*
	31	* NO WARRANTY
	32	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	33	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	34	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	35	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	36	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	37	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	38	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	39	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	40	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	41	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	42	* POSSIBILITY OF SUCH DAMAGES.
	43	*/
	44
1da177e4	45	#include <acpi/acpi.h>
f3d2e786	46	#include <acpi/actables.h>
1da177e4 LT	47
1da177e4 LT	48	#define _COMPONENT ACPI_HARDWARE
4be44fcd	49	ACPI_MODULE_NAME("hwsleep")
1da177e4	50
44f6c012	51	/*******************************************************************************
1da177e4 LT	52	*
	53	* FUNCTION: acpi_set_firmware_waking_vector
	54	*
	55	* PARAMETERS: physical_address - Physical address of ACPI real mode
	56	* entry point.
	57	*
	58	* RETURN: Status
	59	*
44f6c012	60	* DESCRIPTION: Access function for the firmware_waking_vector field in FACS
1da177e4 LT	61	*
1da177e4 LT	62	******************************************************************************/
1da177e4	63	acpi_status
4be44fcd	64	acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
1da177e4	65	{
f3d2e786 BM	66	struct acpi_table_facs *facs;
f3d2e786 BM	67	acpi_status status;
1da177e4	68
b229cf92	69	ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
1da177e4	70
f3d2e786 BM	71	/* Get the FACS */
	72
	73	status =
	74	acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
	75	(struct acpi_table_header **)&facs);
	76	if (ACPI_FAILURE(status)) {
	77	return_ACPI_STATUS(status);
	78	}
	79
1da177e4 LT	80	/* Set the vector */
1da177e4 LT	81
f3d2e786 BM	82	if ((facs->length < 32) \|\| (!(facs->xfirmware_waking_vector))) {
	83	/*
	84	* ACPI 1.0 FACS or short table or optional X_ field is zero
	85	*/
	86	facs->firmware_waking_vector = (u32) physical_address;
4be44fcd	87	} else {
f3d2e786 BM	88	/*
	89	* ACPI 2.0 FACS with valid X_ field
	90	*/
	91	facs->xfirmware_waking_vector = physical_address;
1da177e4 LT	92	}
1da177e4 LT	93
4be44fcd	94	return_ACPI_STATUS(AE_OK);
1da177e4 LT	95	}
1da177e4 LT	96
8313524a BM	97	ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
8313524a BM	98
44f6c012	99	/*******************************************************************************
1da177e4 LT	100	*
	101	* FUNCTION: acpi_get_firmware_waking_vector
	102	*
44f6c012	103	* PARAMETERS: *physical_address - Where the contents of
1da177e4	104	* the firmware_waking_vector field of
44f6c012	105	* the FACS will be returned.
1da177e4	106	*
44f6c012	107	* RETURN: Status, vector
1da177e4	108	*
44f6c012	109	* DESCRIPTION: Access function for the firmware_waking_vector field in FACS
1da177e4 LT	110	*
	111	******************************************************************************/
	112	#ifdef ACPI_FUTURE_USAGE
	113	acpi_status
4be44fcd	114	acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
1da177e4	115	{
f3d2e786 BM	116	struct acpi_table_facs *facs;
f3d2e786 BM	117	acpi_status status;
1da177e4	118
b229cf92	119	ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector);
1da177e4 LT	120
1da177e4 LT	121	if (!physical_address) {
4be44fcd	122	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	123	}
1da177e4 LT	124
f3d2e786 BM	125	/* Get the FACS */
	126
	127	status =
	128	acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
	129	(struct acpi_table_header **)&facs);
	130	if (ACPI_FAILURE(status)) {
	131	return_ACPI_STATUS(status);
	132	}
	133
1da177e4 LT	134	/* Get the vector */
1da177e4 LT	135
f3d2e786 BM	136	if ((facs->length < 32) \|\| (!(facs->xfirmware_waking_vector))) {
	137	/*
	138	* ACPI 1.0 FACS or short table or optional X_ field is zero
	139	*/
	140	*physical_address =
	141	(acpi_physical_address) facs->firmware_waking_vector;
4be44fcd	142	} else {
f3d2e786 BM	143	/*
	144	* ACPI 2.0 FACS with valid X_ field
	145	*/
1da177e4	146	*physical_address =
f3d2e786	147	(acpi_physical_address) facs->xfirmware_waking_vector;
1da177e4 LT	148	}
1da177e4 LT	149
4be44fcd	150	return_ACPI_STATUS(AE_OK);
1da177e4	151	}
8313524a BM	152
8313524a BM	153	ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector)
1da177e4 LT	154	#endif
1da177e4 LT	155
44f6c012	156	/*******************************************************************************
1da177e4 LT	157	*
	158	* FUNCTION: acpi_enter_sleep_state_prep
	159	*
	160	* PARAMETERS: sleep_state - Which sleep state to enter
	161	*
	162	* RETURN: Status
	163	*
	164	* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
	165	* This function must execute with interrupts enabled.
	166	* We break sleeping into 2 stages so that OSPM can handle
	167	* various OS-specific tasks between the two steps.
	168	*
	169	******************************************************************************/
4be44fcd	170	acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
1da177e4	171	{
4be44fcd LB	172	acpi_status status;
	173	struct acpi_object_list arg_list;
	174	union acpi_object arg;
1da177e4	175
b229cf92	176	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
1da177e4 LT	177
	178	/*
	179	* _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
	180	*/
4be44fcd LB	181	status = acpi_get_sleep_type_data(sleep_state,
	182	&acpi_gbl_sleep_type_a,
	183	&acpi_gbl_sleep_type_b);
	184	if (ACPI_FAILURE(status)) {
	185	return_ACPI_STATUS(status);
1da177e4 LT	186	}
	187
	188	/* Setup parameter object */
	189
	190	arg_list.count = 1;
	191	arg_list.pointer = &arg;
	192
	193	arg.type = ACPI_TYPE_INTEGER;
	194	arg.integer.value = sleep_state;
	195
	196	/* Run the _PTS and _GTS methods */
	197
4be44fcd LB	198	status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
	199	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
	200	return_ACPI_STATUS(status);
1da177e4 LT	201	}
1da177e4 LT	202
4be44fcd LB	203	status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
	204	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
	205	return_ACPI_STATUS(status);
1da177e4 LT	206	}
	207
	208	/* Setup the argument to _SST */
	209
	210	switch (sleep_state) {
	211	case ACPI_STATE_S0:
	212	arg.integer.value = ACPI_SST_WORKING;
	213	break;
	214
	215	case ACPI_STATE_S1:
	216	case ACPI_STATE_S2:
	217	case ACPI_STATE_S3:
	218	arg.integer.value = ACPI_SST_SLEEPING;
	219	break;
	220
	221	case ACPI_STATE_S4:
	222	arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
	223	break;
	224
	225	default:
4be44fcd	226	arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
1da177e4 LT	227	break;
	228	}
	229
	230	/* Set the system indicators to show the desired sleep state. */
	231
4be44fcd LB	232	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
4be44fcd LB	233	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
b8e4d893 BM	234	ACPI_EXCEPTION((AE_INFO, status,
b8e4d893 BM	235	"While executing method _SST"));
1da177e4 LT	236	}
1da177e4 LT	237
4be44fcd	238	return_ACPI_STATUS(AE_OK);
1da177e4 LT	239	}
1da177e4 LT	240
8313524a BM	241	ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
8313524a BM	242
44f6c012	243	/*******************************************************************************
1da177e4 LT	244	*
	245	* FUNCTION: acpi_enter_sleep_state
	246	*
	247	* PARAMETERS: sleep_state - Which sleep state to enter
	248	*
	249	* RETURN: Status
	250	*
	251	* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
	252	* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
	253	*
	254	******************************************************************************/
4be44fcd	255	acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
1da177e4	256	{
4be44fcd LB	257	u32 PM1Acontrol;
	258	u32 PM1Bcontrol;
	259	struct acpi_bit_register_info *sleep_type_reg_info;
	260	struct acpi_bit_register_info *sleep_enable_reg_info;
	261	u32 in_value;
	262	acpi_status status;
1da177e4	263
b229cf92	264	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
1da177e4 LT	265
1da177e4 LT	266	if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) \|\|
4be44fcd	267	(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
b8e4d893 BM	268	ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
b8e4d893 BM	269	acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
4be44fcd	270	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	271	}
1da177e4 LT	272
4be44fcd LB	273	sleep_type_reg_info =
	274	acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
	275	sleep_enable_reg_info =
	276	acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
1da177e4 LT	277
	278	/* Clear wake status */
	279
4be44fcd LB	280	status =
	281	acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
	282	if (ACPI_FAILURE(status)) {
	283	return_ACPI_STATUS(status);
1da177e4 LT	284	}
	285
	286	/* Clear all fixed and general purpose status bits */
	287
4be44fcd LB	288	status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
	289	if (ACPI_FAILURE(status)) {
	290	return_ACPI_STATUS(status);
1da177e4 LT	291	}
	292
	293	/*
	294	* 1) Disable/Clear all GPEs
	295	* 2) Enable all wakeup GPEs
	296	*/
4be44fcd LB	297	status = acpi_hw_disable_all_gpes();
	298	if (ACPI_FAILURE(status)) {
	299	return_ACPI_STATUS(status);
1da177e4 LT	300	}
	301	acpi_gbl_system_awake_and_running = FALSE;
	302
4be44fcd LB	303	status = acpi_hw_enable_all_wakeup_gpes();
	304	if (ACPI_FAILURE(status)) {
	305	return_ACPI_STATUS(status);
1da177e4 LT	306	}
	307
	308	/* Get current value of PM1A control */
	309
4be44fcd LB	310	status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
	311	ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
	312	if (ACPI_FAILURE(status)) {
	313	return_ACPI_STATUS(status);
1da177e4	314	}
4be44fcd LB	315	ACPI_DEBUG_PRINT((ACPI_DB_INIT,
4be44fcd LB	316	"Entering sleep state [S%d]\n", sleep_state));
1da177e4 LT	317
	318	/* Clear SLP_EN and SLP_TYP fields */
	319
44f6c012	320	PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask \|
4be44fcd	321	sleep_enable_reg_info->access_bit_mask);
1da177e4 LT	322	PM1Bcontrol = PM1Acontrol;
	323
	324	/* Insert SLP_TYP bits */
	325
4be44fcd LB	326	PM1Acontrol \|=
	327	(acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
	328	PM1Bcontrol \|=
	329	(acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
1da177e4 LT	330
	331	/*
	332	* We split the writes of SLP_TYP and SLP_EN to workaround
	333	* poorly implemented hardware.
	334	*/
	335
	336	/* Write #1: fill in SLP_TYP data */
	337
4be44fcd LB	338	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	339	ACPI_REGISTER_PM1A_CONTROL,
	340	PM1Acontrol);
	341	if (ACPI_FAILURE(status)) {
	342	return_ACPI_STATUS(status);
1da177e4 LT	343	}
1da177e4 LT	344
4be44fcd LB	345	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	346	ACPI_REGISTER_PM1B_CONTROL,
	347	PM1Bcontrol);
	348	if (ACPI_FAILURE(status)) {
	349	return_ACPI_STATUS(status);
1da177e4 LT	350	}
	351
	352	/* Insert SLP_ENABLE bit */
	353
	354	PM1Acontrol \|= sleep_enable_reg_info->access_bit_mask;
	355	PM1Bcontrol \|= sleep_enable_reg_info->access_bit_mask;
	356
	357	/* Write #2: SLP_TYP + SLP_EN */
	358
4be44fcd	359	ACPI_FLUSH_CPU_CACHE();
1da177e4	360
4be44fcd LB	361	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	362	ACPI_REGISTER_PM1A_CONTROL,
	363	PM1Acontrol);
	364	if (ACPI_FAILURE(status)) {
	365	return_ACPI_STATUS(status);
1da177e4 LT	366	}
1da177e4 LT	367
4be44fcd LB	368	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	369	ACPI_REGISTER_PM1B_CONTROL,
	370	PM1Bcontrol);
	371	if (ACPI_FAILURE(status)) {
	372	return_ACPI_STATUS(status);
1da177e4 LT	373	}
	374
	375	if (sleep_state > ACPI_STATE_S3) {
	376	/*
44f6c012 RM	377	* We wanted to sleep > S3, but it didn't happen (by virtue of the
44f6c012 RM	378	* fact that we are still executing!)
1da177e4	379	*
44f6c012 RM	380	* Wait ten seconds, then try again. This is to get S4/S5 to work on
44f6c012 RM	381	* all machines.
1da177e4 LT	382	*
	383	* We wait so long to allow chipsets that poll this reg very slowly to
	384	* still read the right value. Ideally, this block would go
	385	* away entirely.
	386	*/
4be44fcd LB	387	acpi_os_stall(10000000);
	388
	389	status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	390	ACPI_REGISTER_PM1_CONTROL,
	391	sleep_enable_reg_info->
	392	access_bit_mask);
	393	if (ACPI_FAILURE(status)) {
	394	return_ACPI_STATUS(status);
1da177e4 LT	395	}
	396	}
	397
	398	/* Wait until we enter sleep state */
	399
	400	do {
4be44fcd LB	401	status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
	402	ACPI_MTX_DO_NOT_LOCK);
	403	if (ACPI_FAILURE(status)) {
	404	return_ACPI_STATUS(status);
1da177e4 LT	405	}
	406
	407	/* Spin until we wake */
	408
	409	} while (!in_value);
	410
4be44fcd	411	return_ACPI_STATUS(AE_OK);
1da177e4	412	}
1da177e4	413
8313524a	414	ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
1da177e4	415
44f6c012	416	/*******************************************************************************
1da177e4 LT	417	*
	418	* FUNCTION: acpi_enter_sleep_state_s4bios
	419	*
	420	* PARAMETERS: None
	421	*
	422	* RETURN: Status
	423	*
	424	* DESCRIPTION: Perform a S4 bios request.
	425	* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
	426	*
	427	******************************************************************************/
4be44fcd	428	acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
1da177e4	429	{
4be44fcd LB	430	u32 in_value;
4be44fcd LB	431	acpi_status status;
1da177e4	432
b229cf92	433	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
1da177e4	434
4be44fcd LB	435	status =
	436	acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
	437	if (ACPI_FAILURE(status)) {
	438	return_ACPI_STATUS(status);
1da177e4 LT	439	}
1da177e4 LT	440
4be44fcd LB	441	status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
	442	if (ACPI_FAILURE(status)) {
	443	return_ACPI_STATUS(status);
1da177e4 LT	444	}
	445
	446	/*
	447	* 1) Disable/Clear all GPEs
	448	* 2) Enable all wakeup GPEs
	449	*/
4be44fcd LB	450	status = acpi_hw_disable_all_gpes();
	451	if (ACPI_FAILURE(status)) {
	452	return_ACPI_STATUS(status);
1da177e4 LT	453	}
	454	acpi_gbl_system_awake_and_running = FALSE;
	455
4be44fcd LB	456	status = acpi_hw_enable_all_wakeup_gpes();
	457	if (ACPI_FAILURE(status)) {
	458	return_ACPI_STATUS(status);
1da177e4 LT	459	}
1da177e4 LT	460
4be44fcd	461	ACPI_FLUSH_CPU_CACHE();
1da177e4	462
f3d2e786 BM	463	status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
f3d2e786 BM	464	(u32) acpi_gbl_FADT.S4bios_request, 8);
1da177e4 LT	465
	466	do {
	467	acpi_os_stall(1000);
4be44fcd LB	468	status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
	469	ACPI_MTX_DO_NOT_LOCK);
	470	if (ACPI_FAILURE(status)) {
	471	return_ACPI_STATUS(status);
1da177e4 LT	472	}
	473	} while (!in_value);
	474
4be44fcd	475	return_ACPI_STATUS(AE_OK);
1da177e4	476	}
1da177e4	477
8313524a	478	ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
1da177e4	479
44f6c012	480	/*******************************************************************************
1da177e4 LT	481	*
	482	* FUNCTION: acpi_leave_sleep_state
	483	*
	484	* PARAMETERS: sleep_state - Which sleep state we just exited
	485	*
	486	* RETURN: Status
	487	*
	488	* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
	489	* Called with interrupts ENABLED.
	490	*
	491	******************************************************************************/
4be44fcd	492	acpi_status acpi_leave_sleep_state(u8 sleep_state)
1da177e4	493	{
4be44fcd LB	494	struct acpi_object_list arg_list;
	495	union acpi_object arg;
	496	acpi_status status;
	497	struct acpi_bit_register_info *sleep_type_reg_info;
	498	struct acpi_bit_register_info *sleep_enable_reg_info;
	499	u32 PM1Acontrol;
	500	u32 PM1Bcontrol;
1da177e4	501
b229cf92	502	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
1da177e4 LT	503
	504	/*
	505	* Set SLP_TYPE and SLP_EN to state S0.
	506	* This is unclear from the ACPI Spec, but it is required
	507	* by some machines.
	508	*/
4be44fcd LB	509	status = acpi_get_sleep_type_data(ACPI_STATE_S0,
	510	&acpi_gbl_sleep_type_a,
	511	&acpi_gbl_sleep_type_b);
	512	if (ACPI_SUCCESS(status)) {
	513	sleep_type_reg_info =
	514	acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
	515	sleep_enable_reg_info =
	516	acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
1da177e4 LT	517
	518	/* Get current value of PM1A control */
	519
4be44fcd LB	520	status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
	521	ACPI_REGISTER_PM1_CONTROL,
	522	&PM1Acontrol);
	523	if (ACPI_SUCCESS(status)) {
52fc0b02	524
1da177e4 LT	525	/* Clear SLP_EN and SLP_TYP fields */
	526
	527	PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask \|
4be44fcd LB	528	sleep_enable_reg_info->
4be44fcd LB	529	access_bit_mask);
1da177e4 LT	530	PM1Bcontrol = PM1Acontrol;
	531
	532	/* Insert SLP_TYP bits */
	533
4be44fcd LB	534	PM1Acontrol \|=
	535	(acpi_gbl_sleep_type_a << sleep_type_reg_info->
	536	bit_position);
	537	PM1Bcontrol \|=
	538	(acpi_gbl_sleep_type_b << sleep_type_reg_info->
	539	bit_position);
1da177e4 LT	540
	541	/* Just ignore any errors */
	542
4be44fcd LB	543	(void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	544	ACPI_REGISTER_PM1A_CONTROL,
	545	PM1Acontrol);
	546	(void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
	547	ACPI_REGISTER_PM1B_CONTROL,
	548	PM1Bcontrol);
1da177e4 LT	549	}
	550	}
	551
	552	/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
	553
	554	acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
	555
	556	/* Setup parameter object */
	557
	558	arg_list.count = 1;
	559	arg_list.pointer = &arg;
	560	arg.type = ACPI_TYPE_INTEGER;
	561
	562	/* Ignore any errors from these methods */
	563
	564	arg.integer.value = ACPI_SST_WAKING;
4be44fcd LB	565	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
4be44fcd LB	566	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
b8e4d893	567	ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
1da177e4 LT	568	}
	569
	570	arg.integer.value = sleep_state;
4be44fcd LB	571	status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
4be44fcd LB	572	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
b8e4d893	573	ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
1da177e4 LT	574	}
1da177e4 LT	575
4be44fcd LB	576	status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
4be44fcd LB	577	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
b8e4d893	578	ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
1da177e4 LT	579	}
	580	/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
	581
	582	/*
	583	* Restore the GPEs:
	584	* 1) Disable/Clear all GPEs
	585	* 2) Enable all runtime GPEs
	586	*/
4be44fcd LB	587	status = acpi_hw_disable_all_gpes();
	588	if (ACPI_FAILURE(status)) {
	589	return_ACPI_STATUS(status);
1da177e4 LT	590	}
	591	acpi_gbl_system_awake_and_running = TRUE;
	592
4be44fcd LB	593	status = acpi_hw_enable_all_runtime_gpes();
	594	if (ACPI_FAILURE(status)) {
	595	return_ACPI_STATUS(status);
1da177e4 LT	596	}
	597
	598	/* Enable power button */
	599
4be44fcd LB	600	(void)
	601	acpi_set_register(acpi_gbl_fixed_event_info
	602	[ACPI_EVENT_POWER_BUTTON].enable_register_id, 1,
	603	ACPI_MTX_DO_NOT_LOCK);
44f6c012	604
4be44fcd LB	605	(void)
	606	acpi_set_register(acpi_gbl_fixed_event_info
	607	[ACPI_EVENT_POWER_BUTTON].status_register_id, 1,
	608	ACPI_MTX_DO_NOT_LOCK);
1da177e4 LT	609
1da177e4 LT	610	arg.integer.value = ACPI_SST_WORKING;
4be44fcd LB	611	status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
4be44fcd LB	612	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
b8e4d893	613	ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
1da177e4 LT	614	}
1da177e4 LT	615
4be44fcd	616	return_ACPI_STATUS(status);
1da177e4	617	}
8313524a BM	618
8313524a BM	619	ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)