[linux-block.git] / drivers / acpi / acpica / hwgpe.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: hwgpe - Low level GPE enable/disable/clear functions
 *
 * Copyright (C) 2000 - 2020, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"

#define _COMPONENT          ACPI_HARDWARE
ACPI_MODULE_NAME("hwgpe")
#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
/* Local prototypes */
static acpi_status
acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
				struct acpi_gpe_block_info *gpe_block,
				void *context);

static acpi_status
acpi_hw_gpe_enable_write(u8 enable_mask,
			 struct acpi_gpe_register_info *gpe_register_info);

/******************************************************************************
 *
 * FUNCTION:	acpi_hw_get_gpe_register_bit
 *
 * PARAMETERS:	gpe_event_info	    - Info block for the GPE
 *
 * RETURN:	Register mask with a one in the GPE bit position
 *
 * DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
 *              correct position for the input GPE.
 *
 ******************************************************************************/

u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
{

	return ((u32)1 <<
		(gpe_event_info->gpe_number -
		 gpe_event_info->register_info->base_gpe_number));
}

/******************************************************************************
 *
 * FUNCTION:	acpi_hw_low_set_gpe
 *
 * PARAMETERS:	gpe_event_info	    - Info block for the GPE to be disabled
 *		action		    - Enable or disable
 *
 * RETURN:	Status
 *
 * DESCRIPTION: Enable or disable a single GPE in the parent enable register.
 *              The enable_mask field of the involved GPE register must be
 *              updated by the caller if necessary.
 *
 ******************************************************************************/

acpi_status
acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
{
	struct acpi_gpe_register_info *gpe_register_info;
	acpi_status status = AE_OK;
	u64 enable_mask;
	u32 register_bit;

	ACPI_FUNCTION_ENTRY();

	/* Get the info block for the entire GPE register */

	gpe_register_info = gpe_event_info->register_info;
	if (!gpe_register_info) {
		return (AE_NOT_EXIST);
	}

	/* Get current value of the enable register that contains this GPE */

	status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/* Set or clear just the bit that corresponds to this GPE */

	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
	switch (action) {
	case ACPI_GPE_CONDITIONAL_ENABLE:

		/* Only enable if the corresponding enable_mask bit is set */

		if (!(register_bit & gpe_register_info->enable_mask)) {
			return (AE_BAD_PARAMETER);
		}

		/*lint -fallthrough */

	case ACPI_GPE_ENABLE:

		ACPI_SET_BIT(enable_mask, register_bit);
		break;

	case ACPI_GPE_DISABLE:

		ACPI_CLEAR_BIT(enable_mask, register_bit);
		break;

	default:

		ACPI_ERROR((AE_INFO, "Invalid GPE Action, %u", action));
		return (AE_BAD_PARAMETER);
	}

	if (!(register_bit & gpe_register_info->mask_for_run)) {

		/* Write the updated enable mask */

		status =
		    acpi_hw_write(enable_mask,
				  &gpe_register_info->enable_address);
	}
	return (status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_clear_gpe
 *
 * PARAMETERS:  gpe_event_info      - Info block for the GPE to be cleared
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Clear the status bit for a single GPE.
 *
 ******************************************************************************/

acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
{
	struct acpi_gpe_register_info *gpe_register_info;
	acpi_status status;
	u32 register_bit;

	ACPI_FUNCTION_ENTRY();

	/* Get the info block for the entire GPE register */

	gpe_register_info = gpe_event_info->register_info;
	if (!gpe_register_info) {
		return (AE_NOT_EXIST);
	}

	/*
	 * Write a one to the appropriate bit in the status register to
	 * clear this GPE.
	 */
	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);

	status =
	    acpi_hw_write(register_bit, &gpe_register_info->status_address);
	return (status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_get_gpe_status
 *
 * PARAMETERS:  gpe_event_info      - Info block for the GPE to queried
 *              event_status        - Where the GPE status is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Return the status of a single GPE.
 *
 ******************************************************************************/

acpi_status
acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
		       acpi_event_status *event_status)
{
	u64 in_byte;
	u32 register_bit;
	struct acpi_gpe_register_info *gpe_register_info;
	acpi_event_status local_event_status = 0;
	acpi_status status;

	ACPI_FUNCTION_ENTRY();

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

	/* GPE currently handled? */

	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
	    ACPI_GPE_DISPATCH_NONE) {
		local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
	}

	/* Get the info block for the entire GPE register */

	gpe_register_info = gpe_event_info->register_info;

	/* Get the register bitmask for this GPE */

	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);

	/* GPE currently enabled? (enabled for runtime?) */

	if (register_bit & gpe_register_info->enable_for_run) {
		local_event_status |= ACPI_EVENT_FLAG_ENABLED;
	}

	/* GPE currently masked? (masked for runtime?) */

	if (register_bit & gpe_register_info->mask_for_run) {
		local_event_status |= ACPI_EVENT_FLAG_MASKED;
	}

	/* GPE enabled for wake? */

	if (register_bit & gpe_register_info->enable_for_wake) {
		local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
	}

	/* GPE currently enabled (enable bit == 1)? */

	status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	if (register_bit & in_byte) {
		local_event_status |= ACPI_EVENT_FLAG_ENABLE_SET;
	}

	/* GPE currently active (status bit == 1)? */

	status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	if (register_bit & in_byte) {
		local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
	}

	/* Set return value */

	(*event_status) = local_event_status;
	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_gpe_enable_write
 *
 * PARAMETERS:  enable_mask         - Bit mask to write to the GPE register
 *              gpe_register_info   - Gpe Register info
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Write the enable mask byte to the given GPE register.
 *
 ******************************************************************************/

static acpi_status
acpi_hw_gpe_enable_write(u8 enable_mask,
			 struct acpi_gpe_register_info *gpe_register_info)
{
	acpi_status status;

	gpe_register_info->enable_mask = enable_mask;

	status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
	return (status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_disable_gpe_block
 *
 * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
 *              gpe_block           - Gpe Block info
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Disable all GPEs within a single GPE block
 *
 ******************************************************************************/

acpi_status
acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
			  struct acpi_gpe_block_info *gpe_block, void *context)
{
	u32 i;
	acpi_status status;

	/* Examine each GPE Register within the block */

	for (i = 0; i < gpe_block->register_count; i++) {

		/* Disable all GPEs in this register */

		status =
		    acpi_hw_gpe_enable_write(0x00,
					     &gpe_block->register_info[i]);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
	}

	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_clear_gpe_block
 *
 * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
 *              gpe_block           - Gpe Block info
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
 *
 ******************************************************************************/

acpi_status
acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
			struct acpi_gpe_block_info *gpe_block, void *context)
{
	u32 i;
	acpi_status status;

	/* Examine each GPE Register within the block */

	for (i = 0; i < gpe_block->register_count; i++) {

		/* Clear status on all GPEs in this register */

		status =
		    acpi_hw_write(0xFF,
				  &gpe_block->register_info[i].status_address);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
	}

	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_enable_runtime_gpe_block
 *
 * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
 *              gpe_block           - Gpe Block info
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
 *              combination wake/run GPEs.
 *
 ******************************************************************************/

acpi_status
acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
				 struct acpi_gpe_block_info *gpe_block,
				 void *context)
{
	u32 i;
	acpi_status status;
	struct acpi_gpe_register_info *gpe_register_info;
	u8 enable_mask;

	/* NOTE: assumes that all GPEs are currently disabled */

	/* Examine each GPE Register within the block */

	for (i = 0; i < gpe_block->register_count; i++) {
		gpe_register_info = &gpe_block->register_info[i];
		if (!gpe_register_info->enable_for_run) {
			continue;
		}

		/* Enable all "runtime" GPEs in this register */

		enable_mask = gpe_register_info->enable_for_run &
		    ~gpe_register_info->mask_for_run;
		status =
		    acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
	}

	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_enable_wakeup_gpe_block
 *
 * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
 *              gpe_block           - Gpe Block info
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
 *              combination wake/run GPEs.
 *
 ******************************************************************************/

static acpi_status
acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
				struct acpi_gpe_block_info *gpe_block,
				void *context)
{
	u32 i;
	acpi_status status;
	struct acpi_gpe_register_info *gpe_register_info;

	/* Examine each GPE Register within the block */

	for (i = 0; i < gpe_block->register_count; i++) {
		gpe_register_info = &gpe_block->register_info[i];

		/*
		 * Enable all "wake" GPEs in this register and disable the
		 * remaining ones.
		 */

		status =
		    acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
					     gpe_register_info);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
	}

	return (AE_OK);
}

struct acpi_gpe_block_status_context {
	struct acpi_gpe_register_info *gpe_skip_register_info;
	u8 gpe_skip_mask;
	u8 retval;
};

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_get_gpe_block_status
 *
 * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
 *              gpe_block           - Gpe Block info
 *              context             - GPE list walk context data
 *
 * RETURN:      Success
 *
 * DESCRIPTION: Produce a combined GPE status bits mask for the given block.
 *
 ******************************************************************************/

static acpi_status
acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
			     struct acpi_gpe_block_info *gpe_block,
			     void *context)
{
	struct acpi_gpe_block_status_context *c = context;
	struct acpi_gpe_register_info *gpe_register_info;
	u64 in_enable, in_status;
	acpi_status status;
	u8 ret_mask;
	u32 i;

	/* Examine each GPE Register within the block */

	for (i = 0; i < gpe_block->register_count; i++) {
		gpe_register_info = &gpe_block->register_info[i];

		status = acpi_hw_read(&in_enable,
				      &gpe_register_info->enable_address);
		if (ACPI_FAILURE(status)) {
			continue;
		}

		status = acpi_hw_read(&in_status,
				      &gpe_register_info->status_address);
		if (ACPI_FAILURE(status)) {
			continue;
		}

		ret_mask = in_enable & in_status;
		if (ret_mask && c->gpe_skip_register_info == gpe_register_info) {
			ret_mask &= ~c->gpe_skip_mask;
		}
		c->retval |= ret_mask;
	}

	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_disable_all_gpes
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
 *
 ******************************************************************************/

acpi_status acpi_hw_disable_all_gpes(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(hw_disable_all_gpes);

	status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
	return_ACPI_STATUS(status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_enable_all_runtime_gpes
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
 *
 ******************************************************************************/

acpi_status acpi_hw_enable_all_runtime_gpes(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);

	status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL);
	return_ACPI_STATUS(status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_enable_all_wakeup_gpes
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
 *
 ******************************************************************************/

acpi_status acpi_hw_enable_all_wakeup_gpes(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);

	status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
	return_ACPI_STATUS(status);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_hw_check_all_gpes
 *
 * PARAMETERS:  gpe_skip_device      - GPE devoce of the GPE to skip
 *              gpe_skip_number      - Number of the GPE to skip
 *
 * RETURN:      Combined status of all GPEs
 *
 * DESCRIPTION: Check all enabled GPEs in all GPE blocks, except for the one
 *              represented by the "skip" arguments, and return TRUE if the
 *              status bit is set for at least one of them of FALSE otherwise.
 *
 ******************************************************************************/

u8 acpi_hw_check_all_gpes(acpi_handle gpe_skip_device, u32 gpe_skip_number)
{
	struct acpi_gpe_block_status_context context = {
		.gpe_skip_register_info = NULL,
		.retval = 0,
	};
	struct acpi_gpe_event_info *gpe_event_info;
	acpi_cpu_flags flags;

	ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes);

	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);

	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_skip_device,
						    gpe_skip_number);
	if (gpe_event_info) {
		context.gpe_skip_register_info = gpe_event_info->register_info;
		context.gpe_skip_mask = acpi_hw_get_gpe_register_bit(gpe_event_info);
	}

	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);

	(void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &context);
	return (context.retval != 0);
}

#endif				/* !ACPI_REDUCED_HARDWARE */
Commit	Line	Data
95857638	1	// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
1da177e4 LT	2	/******************************************************************************
	3	*
	4	* Module Name: hwgpe - Low level GPE enable/disable/clear functions
	5	*
800ba7c5	6	* Copyright (C) 2000 - 2020, Intel Corp.
1da177e4	7	*
95857638	8	*****************************************************************************/
1da177e4 LT	9
1da177e4 LT	10	#include <acpi/acpi.h>
e2f7a777 LB	11	#include "accommon.h"
e2f7a777 LB	12	#include "acevents.h"
1da177e4 LT	13
1da177e4 LT	14	#define _COMPONENT ACPI_HARDWARE
4be44fcd	15	ACPI_MODULE_NAME("hwgpe")
33620c54	16	#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
44f6c012	17	/* Local prototypes */
44f6c012	18	static acpi_status
4be44fcd	19	acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
e97d6bf1 BM	20	struct acpi_gpe_block_info *gpe_block,
e97d6bf1 BM	21	void *context);
1da177e4	22
1c4c81a2 LZ	23	static acpi_status
	24	acpi_hw_gpe_enable_write(u8 enable_mask,
	25	struct acpi_gpe_register_info *gpe_register_info);
	26
e4e9a735 RW	27	/******************************************************************************
e4e9a735 RW	28	*
b76df673	29	* FUNCTION: acpi_hw_get_gpe_register_bit
e4e9a735 RW	30	*
e4e9a735 RW	31	* PARAMETERS: gpe_event_info - Info block for the GPE
e4e9a735	32	*
da503373	33	* RETURN: Register mask with a one in the GPE bit position
e4e9a735	34	*
da503373 LM	35	* DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
da503373 LM	36	* correct position for the input GPE.
e4e9a735 RW	37	*
	38	******************************************************************************/
	39
1d94e1e8	40	u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
e4e9a735	41	{
9c0d7939 LZ	42
	43	return ((u32)1 <<
	44	(gpe_event_info->gpe_number -
	45	gpe_event_info->register_info->base_gpe_number));
e4e9a735 RW	46	}
e4e9a735 RW	47
e38e8a07 BM	48	/******************************************************************************
e38e8a07 BM	49	*
fd247447	50	* FUNCTION: acpi_hw_low_set_gpe
e38e8a07 BM	51	*
e38e8a07 BM	52	* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
fd247447	53	* action - Enable or disable
e38e8a07 BM	54	*
	55	* RETURN: Status
	56	*
da503373	57	* DESCRIPTION: Enable or disable a single GPE in the parent enable register.
0ee0d349 RW	58	* The enable_mask field of the involved GPE register must be
0ee0d349 RW	59	* updated by the caller if necessary.
e38e8a07 BM	60	*
	61	******************************************************************************/
	62
fd247447	63	acpi_status
da503373	64	acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
e38e8a07 BM	65	{
e38e8a07 BM	66	struct acpi_gpe_register_info *gpe_register_info;
2af52c2b	67	acpi_status status = AE_OK;
8381c54f	68	u64 enable_mask;
e4e9a735	69	u32 register_bit;
e38e8a07	70
fd247447 RW	71	ACPI_FUNCTION_ENTRY();
fd247447 RW	72
e38e8a07 BM	73	/* Get the info block for the entire GPE register */
	74
	75	gpe_register_info = gpe_event_info->register_info;
	76	if (!gpe_register_info) {
	77	return (AE_NOT_EXIST);
	78	}
	79
	80	/* Get current value of the enable register that contains this GPE */
	81
c6b5774c	82	status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
e38e8a07 BM	83	if (ACPI_FAILURE(status)) {
	84	return (status);
	85	}
	86
da503373	87	/* Set or clear just the bit that corresponds to this GPE */
e38e8a07	88
1d94e1e8	89	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
0ee0d349	90	switch (action) {
3a37898d	91	case ACPI_GPE_CONDITIONAL_ENABLE:
da503373	92
c50f13c6	93	/* Only enable if the corresponding enable_mask bit is set */
da503373	94
c50f13c6	95	if (!(register_bit & gpe_register_info->enable_mask)) {
c9a8bbb7	96	return (AE_BAD_PARAMETER);
da503373 LM	97	}
	98
	99	/lint -fallthrough /
c9a8bbb7	100
fd247447	101	case ACPI_GPE_ENABLE:
1d1ea1b7	102
fd247447 RW	103	ACPI_SET_BIT(enable_mask, register_bit);
	104	break;
	105
	106	case ACPI_GPE_DISABLE:
1d1ea1b7	107
fd247447 RW	108	ACPI_CLEAR_BIT(enable_mask, register_bit);
	109	break;
	110
	111	default:
1d1ea1b7	112
5e30a96e	113	ACPI_ERROR((AE_INFO, "Invalid GPE Action, %u", action));
fd247447 RW	114	return (AE_BAD_PARAMETER);
fd247447 RW	115	}
e38e8a07	116
2af52c2b	117	if (!(register_bit & gpe_register_info->mask_for_run)) {
e38e8a07	118
2af52c2b LZ	119	/* Write the updated enable mask */
	120
	121	status =
	122	acpi_hw_write(enable_mask,
	123	&gpe_register_info->enable_address);
	124	}
e38e8a07 BM	125	return (status);
	126	}
	127
1da177e4 LT	128	/******************************************************************************
	129	*
	130	* FUNCTION: acpi_hw_clear_gpe
	131	*
	132	* PARAMETERS: gpe_event_info - Info block for the GPE to be cleared
	133	*
	134	* RETURN: Status
	135	*
	136	* DESCRIPTION: Clear the status bit for a single GPE.
	137	*
	138	******************************************************************************/
	139
f5c1e1c5	140	acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
1da177e4	141	{
e4e9a735	142	struct acpi_gpe_register_info *gpe_register_info;
4be44fcd	143	acpi_status status;
e4e9a735	144	u32 register_bit;
1da177e4	145
4be44fcd	146	ACPI_FUNCTION_ENTRY();
1da177e4	147
e4e9a735 RW	148	/* Get the info block for the entire GPE register */
	149
	150	gpe_register_info = gpe_event_info->register_info;
	151	if (!gpe_register_info) {
	152	return (AE_NOT_EXIST);
	153	}
	154
1da177e4 LT	155	/*
	156	* Write a one to the appropriate bit in the status register to
	157	* clear this GPE.
	158	*/
1d94e1e8	159	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
da503373	160
1fad8738 BM	161	status =
1fad8738 BM	162	acpi_hw_write(register_bit, &gpe_register_info->status_address);
1da177e4 LT	163	return (status);
	164	}
	165
1da177e4 LT	166	/******************************************************************************
	167	*
	168	* FUNCTION: acpi_hw_get_gpe_status
	169	*
	170	* PARAMETERS: gpe_event_info - Info block for the GPE to queried
	171	* event_status - Where the GPE status is returned
	172	*
	173	* RETURN: Status
	174	*
	175	* DESCRIPTION: Return the status of a single GPE.
	176	*
	177	******************************************************************************/
44f6c012	178
1da177e4	179	acpi_status
f5c1e1c5	180	acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
f19f1a7e	181	acpi_event_status *event_status)
1da177e4	182	{
8381c54f	183	u64 in_byte;
e4e9a735	184	u32 register_bit;
4be44fcd	185	struct acpi_gpe_register_info *gpe_register_info;
4be44fcd	186	acpi_event_status local_event_status = 0;
da503373	187	acpi_status status;
1da177e4	188
4be44fcd	189	ACPI_FUNCTION_ENTRY();
1da177e4 LT	190
	191	if (!event_status) {
	192	return (AE_BAD_PARAMETER);
	193	}
	194
a08f813e LZ	195	/* GPE currently handled? */
a08f813e LZ	196
7c43312a	197	if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
a08f813e	198	ACPI_GPE_DISPATCH_NONE) {
2f857234	199	local_event_status \|= ACPI_EVENT_FLAG_HAS_HANDLER;
a08f813e LZ	200	}
a08f813e LZ	201
1da177e4 LT	202	/* Get the info block for the entire GPE register */
	203
	204	gpe_register_info = gpe_event_info->register_info;
	205
	206	/* Get the register bitmask for this GPE */
	207
1d94e1e8	208	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
1da177e4 LT	209
	210	/* GPE currently enabled? (enabled for runtime?) */
	211
	212	if (register_bit & gpe_register_info->enable_for_run) {
	213	local_event_status \|= ACPI_EVENT_FLAG_ENABLED;
	214	}
	215
2af52c2b LZ	216	/* GPE currently masked? (masked for runtime?) */
	217
	218	if (register_bit & gpe_register_info->mask_for_run) {
	219	local_event_status \|= ACPI_EVENT_FLAG_MASKED;
	220	}
	221
1da177e4 LT	222	/* GPE enabled for wake? */
	223
	224	if (register_bit & gpe_register_info->enable_for_wake) {
	225	local_event_status \|= ACPI_EVENT_FLAG_WAKE_ENABLED;
	226	}
	227
09af8e82 LZ	228	/* GPE currently enabled (enable bit == 1)? */
	229
	230	status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
	231	if (ACPI_FAILURE(status)) {
	232	return (status);
	233	}
	234
	235	if (register_bit & in_byte) {
	236	local_event_status \|= ACPI_EVENT_FLAG_ENABLE_SET;
	237	}
	238
1da177e4 LT	239	/* GPE currently active (status bit == 1)? */
1da177e4 LT	240
c6b5774c	241	status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
4be44fcd	242	if (ACPI_FAILURE(status)) {
2147d3f0	243	return (status);
1da177e4 LT	244	}
	245
	246	if (register_bit & in_byte) {
09af8e82	247	local_event_status \|= ACPI_EVENT_FLAG_STATUS_SET;
1da177e4 LT	248	}
	249
	250	/* Set return value */
	251
	252	(*event_status) = local_event_status;
2147d3f0	253	return (AE_OK);
1da177e4	254	}
1da177e4	255
c50f13c6 RW	256	/******************************************************************************
	257	*
	258	* FUNCTION: acpi_hw_gpe_enable_write
	259	*
	260	* PARAMETERS: enable_mask - Bit mask to write to the GPE register
	261	* gpe_register_info - Gpe Register info
	262	*
	263	* RETURN: Status
	264	*
	265	* DESCRIPTION: Write the enable mask byte to the given GPE register.
	266	*
	267	******************************************************************************/
	268
	269	static acpi_status
	270	acpi_hw_gpe_enable_write(u8 enable_mask,
	271	struct acpi_gpe_register_info *gpe_register_info)
	272	{
	273	acpi_status status;
	274
0ee0d349	275	gpe_register_info->enable_mask = enable_mask;
5431b654	276
1fad8738	277	status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
c50f13c6 RW	278	return (status);
	279	}
	280
1da177e4 LT	281	/******************************************************************************
	282	*
	283	* FUNCTION: acpi_hw_disable_gpe_block
	284	*
	285	* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
	286	* gpe_block - Gpe Block info
	287	*
	288	* RETURN: Status
	289	*
44f6c012	290	* DESCRIPTION: Disable all GPEs within a single GPE block
1da177e4 LT	291	*
	292	******************************************************************************/
	293
	294	acpi_status
e97d6bf1 BM	295	acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
e97d6bf1 BM	296	struct acpi_gpe_block_info gpe_block, void context)
1da177e4	297	{
4be44fcd LB	298	u32 i;
4be44fcd LB	299	acpi_status status;
1da177e4 LT	300
	301	/* Examine each GPE Register within the block */
	302
	303	for (i = 0; i < gpe_block->register_count; i++) {
52fc0b02	304
1da177e4 LT	305	/* Disable all GPEs in this register */
1da177e4 LT	306
ecfbbc7b	307	status =
c50f13c6 RW	308	acpi_hw_gpe_enable_write(0x00,
c50f13c6 RW	309	&gpe_block->register_info[i]);
4be44fcd	310	if (ACPI_FAILURE(status)) {
1da177e4 LT	311	return (status);
	312	}
	313	}
	314
	315	return (AE_OK);
	316	}
	317
1da177e4 LT	318	/******************************************************************************
	319	*
	320	* FUNCTION: acpi_hw_clear_gpe_block
	321	*
	322	* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
	323	* gpe_block - Gpe Block info
	324	*
	325	* RETURN: Status
	326	*
44f6c012	327	* DESCRIPTION: Clear status bits for all GPEs within a single GPE block
1da177e4 LT	328	*
	329	******************************************************************************/
	330
	331	acpi_status
e97d6bf1 BM	332	acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
e97d6bf1 BM	333	struct acpi_gpe_block_info gpe_block, void context)
1da177e4	334	{
4be44fcd LB	335	u32 i;
4be44fcd LB	336	acpi_status status;
1da177e4 LT	337
	338	/* Examine each GPE Register within the block */
	339
	340	for (i = 0; i < gpe_block->register_count; i++) {
52fc0b02	341
1da177e4 LT	342	/* Clear status on all GPEs in this register */
1da177e4 LT	343
ecfbbc7b	344	status =
c6b5774c BM	345	acpi_hw_write(0xFF,
c6b5774c BM	346	&gpe_block->register_info[i].status_address);
4be44fcd	347	if (ACPI_FAILURE(status)) {
1da177e4 LT	348	return (status);
	349	}
	350	}
	351
	352	return (AE_OK);
	353	}
	354
1da177e4 LT	355	/******************************************************************************
	356	*
	357	* FUNCTION: acpi_hw_enable_runtime_gpe_block
	358	*
	359	* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
	360	* gpe_block - Gpe Block info
	361	*
	362	* RETURN: Status
	363	*
44f6c012 RM	364	* DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
44f6c012 RM	365	* combination wake/run GPEs.
1da177e4 LT	366	*
	367	******************************************************************************/
	368
	369	acpi_status
e97d6bf1	370	acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
f5c1e1c5	371	struct acpi_gpe_block_info *gpe_block,
1f86e8c1	372	void *context)
1da177e4	373	{
4be44fcd LB	374	u32 i;
4be44fcd LB	375	acpi_status status;
c50f13c6	376	struct acpi_gpe_register_info *gpe_register_info;
2af52c2b	377	u8 enable_mask;
1da177e4 LT	378
	379	/* NOTE: assumes that all GPEs are currently disabled */
	380
	381	/* Examine each GPE Register within the block */
	382
	383	for (i = 0; i < gpe_block->register_count; i++) {
c50f13c6 RW	384	gpe_register_info = &gpe_block->register_info[i];
c50f13c6 RW	385	if (!gpe_register_info->enable_for_run) {
1da177e4 LT	386	continue;
	387	}
	388
	389	/* Enable all "runtime" GPEs in this register */
	390
2af52c2b LZ	391	enable_mask = gpe_register_info->enable_for_run &
2af52c2b LZ	392	~gpe_register_info->mask_for_run;
c6b5774c	393	status =
2af52c2b	394	acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
4be44fcd	395	if (ACPI_FAILURE(status)) {
1da177e4 LT	396	return (status);
	397	}
	398	}
	399
	400	return (AE_OK);
	401	}
	402
1da177e4 LT	403	/******************************************************************************
	404	*
	405	* FUNCTION: acpi_hw_enable_wakeup_gpe_block
	406	*
	407	* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
	408	* gpe_block - Gpe Block info
	409	*
	410	* RETURN: Status
	411	*
44f6c012 RM	412	* DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
44f6c012 RM	413	* combination wake/run GPEs.
1da177e4 LT	414	*
	415	******************************************************************************/
	416
44f6c012	417	static acpi_status
4be44fcd	418	acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
e97d6bf1 BM	419	struct acpi_gpe_block_info *gpe_block,
e97d6bf1 BM	420	void *context)
1da177e4	421	{
4be44fcd LB	422	u32 i;
4be44fcd LB	423	acpi_status status;
c50f13c6	424	struct acpi_gpe_register_info *gpe_register_info;
1da177e4 LT	425
	426	/* Examine each GPE Register within the block */
	427
	428	for (i = 0; i < gpe_block->register_count; i++) {
c50f13c6	429	gpe_register_info = &gpe_block->register_info[i];
1da177e4	430
5a0b8dee RW	431	/*
	432	* Enable all "wake" GPEs in this register and disable the
	433	* remaining ones.
	434	*/
1da177e4	435
c6b5774c	436	status =
c50f13c6 RW	437	acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
c50f13c6 RW	438	gpe_register_info);
4be44fcd	439	if (ACPI_FAILURE(status)) {
1da177e4 LT	440	return (status);
	441	}
	442	}
	443
	444	return (AE_OK);
	445	}
	446
0ce792d6 RW	447	struct acpi_gpe_block_status_context {
	448	struct acpi_gpe_register_info *gpe_skip_register_info;
	449	u8 gpe_skip_mask;
	450	u8 retval;
	451	};
	452
ea128834 RW	453	/******************************************************************************
	454	*
	455	* FUNCTION: acpi_hw_get_gpe_block_status
	456	*
	457	* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
	458	* gpe_block - Gpe Block info
0ce792d6	459	* context - GPE list walk context data
ea128834 RW	460	*
	461	* RETURN: Success
	462	*
	463	* DESCRIPTION: Produce a combined GPE status bits mask for the given block.
	464	*
	465	******************************************************************************/
	466
	467	static acpi_status
	468	acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
	469	struct acpi_gpe_block_info *gpe_block,
0ce792d6	470	void *context)
ea128834	471	{
0ce792d6	472	struct acpi_gpe_block_status_context *c = context;
ea128834 RW	473	struct acpi_gpe_register_info *gpe_register_info;
	474	u64 in_enable, in_status;
	475	acpi_status status;
0ce792d6	476	u8 ret_mask;
ea128834 RW	477	u32 i;
	478
	479	/* Examine each GPE Register within the block */
	480
	481	for (i = 0; i < gpe_block->register_count; i++) {
	482	gpe_register_info = &gpe_block->register_info[i];
	483
	484	status = acpi_hw_read(&in_enable,
	485	&gpe_register_info->enable_address);
	486	if (ACPI_FAILURE(status)) {
	487	continue;
	488	}
	489
	490	status = acpi_hw_read(&in_status,
	491	&gpe_register_info->status_address);
	492	if (ACPI_FAILURE(status)) {
	493	continue;
	494	}
	495
0ce792d6 RW	496	ret_mask = in_enable & in_status;
	497	if (ret_mask && c->gpe_skip_register_info == gpe_register_info) {
	498	ret_mask &= ~c->gpe_skip_mask;
	499	}
	500	c->retval \|= ret_mask;
ea128834 RW	501	}
	502
	503	return (AE_OK);
	504	}
	505
1da177e4 LT	506	/******************************************************************************
	507	*
	508	* FUNCTION: acpi_hw_disable_all_gpes
	509	*
73459f73	510	* PARAMETERS: None
1da177e4 LT	511	*
	512	* RETURN: Status
	513	*
44f6c012	514	* DESCRIPTION: Disable and clear all GPEs in all GPE blocks
1da177e4 LT	515	*
	516	******************************************************************************/
	517
4be44fcd	518	acpi_status acpi_hw_disable_all_gpes(void)
1da177e4	519	{
4be44fcd	520	acpi_status status;
1da177e4	521
b229cf92	522	ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
1da177e4	523
e97d6bf1	524	status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
4be44fcd	525	return_ACPI_STATUS(status);
1da177e4 LT	526	}
1da177e4 LT	527
1da177e4 LT	528	/******************************************************************************
	529	*
	530	* FUNCTION: acpi_hw_enable_all_runtime_gpes
	531	*
73459f73	532	* PARAMETERS: None
1da177e4 LT	533	*
	534	* RETURN: Status
	535	*
44f6c012	536	* DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
1da177e4 LT	537	*
	538	******************************************************************************/
	539
4be44fcd	540	acpi_status acpi_hw_enable_all_runtime_gpes(void)
1da177e4	541	{
4be44fcd	542	acpi_status status;
1da177e4	543
b229cf92	544	ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
1da177e4	545
e97d6bf1	546	status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL);
4be44fcd	547	return_ACPI_STATUS(status);
1da177e4 LT	548	}
1da177e4 LT	549
1da177e4 LT	550	/******************************************************************************
	551	*
	552	* FUNCTION: acpi_hw_enable_all_wakeup_gpes
	553	*
73459f73	554	* PARAMETERS: None
1da177e4 LT	555	*
	556	* RETURN: Status
	557	*
44f6c012	558	* DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
1da177e4 LT	559	*
	560	******************************************************************************/
	561
4be44fcd	562	acpi_status acpi_hw_enable_all_wakeup_gpes(void)
1da177e4	563	{
4be44fcd	564	acpi_status status;
1da177e4	565
b229cf92	566	ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
1da177e4	567
e97d6bf1	568	status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
4be44fcd	569	return_ACPI_STATUS(status);
1da177e4	570	}
33620c54	571
ea128834 RW	572	/******************************************************************************
	573	*
	574	* FUNCTION: acpi_hw_check_all_gpes
	575	*
0ce792d6 RW	576	* PARAMETERS: gpe_skip_device - GPE devoce of the GPE to skip
0ce792d6 RW	577	* gpe_skip_number - Number of the GPE to skip
ea128834 RW	578	*
	579	* RETURN: Combined status of all GPEs
	580	*
0ce792d6 RW	581	* DESCRIPTION: Check all enabled GPEs in all GPE blocks, except for the one
0ce792d6 RW	582	* represented by the "skip" arguments, and return TRUE if the
ea128834 RW	583	* status bit is set for at least one of them of FALSE otherwise.
	584	*
	585	******************************************************************************/
	586
0ce792d6	587	u8 acpi_hw_check_all_gpes(acpi_handle gpe_skip_device, u32 gpe_skip_number)
ea128834	588	{
0ce792d6 RW	589	struct acpi_gpe_block_status_context context = {
	590	.gpe_skip_register_info = NULL,
	591	.retval = 0,
	592	};
	593	struct acpi_gpe_event_info *gpe_event_info;
	594	acpi_cpu_flags flags;
ea128834 RW	595
	596	ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes);
	597
0ce792d6 RW	598	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
	599
	600	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_skip_device,
	601	gpe_skip_number);
	602	if (gpe_event_info) {
	603	context.gpe_skip_register_info = gpe_event_info->register_info;
	604	context.gpe_skip_mask = acpi_hw_get_gpe_register_bit(gpe_event_info);
	605	}
	606
	607	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
ea128834	608
0ce792d6 RW	609	(void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &context);
0ce792d6 RW	610	return (context.retval != 0);
ea128834 RW	611	}
ea128834 RW	612
33620c54	613	#endif /* !ACPI_REDUCED_HARDWARE */