Release 4.11 drivers/acpi/acpica/hwgpe.c

/******************************************************************************
 *
 * Module Name: hwgpe - Low level GPE enable/disable/clear functions
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

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


#define _COMPONENT          ACPI_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));
}

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24
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3
10.00%
1
25.00%
Lv Zheng
2
6.67%
1
25.00%
Lin Ming
1
3.33%
1
25.00%
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30
100.00%
4
100.00%

/******************************************************************************
 *
 * 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;
	u32 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);
}

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Robert Moore
92
49.46%
3
27.27%
Rafael J. Wysocki
70
37.63%
4
36.36%
Lv Zheng
15
8.06%
1
9.09%
Lin Ming
9
4.84%
3
27.27%
Total
186
100.00%
11
100.00%

/******************************************************************************
 *
 * 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);
}

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Rafael J. Wysocki
25
36.76%
1
7.14%
Andy Grover
19
27.94%
5
35.71%
Alexey Y. Starikovskiy
9
13.24%
1
7.14%
Linus Torvalds (pre-git)
8
11.76%
1
7.14%
Len Brown
2
2.94%
2
14.29%
Lin Ming
2
2.94%
2
14.29%
Linus Torvalds
2
2.94%
1
7.14%
Robert Moore
1
1.47%
1
7.14%
Total
68
100.00%
14
100.00%

/******************************************************************************
 *
 * 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)
{
	u32 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);
}

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21.74%
Andy Grover
60
27.40%
8
34.78%
Linus Torvalds (pre-git)
44
20.09%
1
4.35%
Linus Torvalds
14
6.39%
2
8.70%
Len Brown
12
5.48%
1
4.35%
Robert Moore
7
3.20%
2
8.70%
Lin Ming
4
1.83%
2
8.70%
Alexey Y. Starikovskiy
3
1.37%
1
4.35%
Rafael J. Wysocki
1
0.46%
1
4.35%
Total
219
100.00%
23
100.00%

/******************************************************************************
 *
 * 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);
}

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40
100.00%
2
100.00%

/******************************************************************************
 *
 * 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);
}

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Andy Grover
64
82.05%
3
42.86%
Linus Torvalds
8
10.26%
1
14.29%
Robert Moore
4
5.13%
1
14.29%
Rafael J. Wysocki
1
1.28%
1
14.29%
Len Brown
1
1.28%
1
14.29%
Total
78
100.00%
7
100.00%

/******************************************************************************
 *
 * 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);
}

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74
92.50%
2
40.00%
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5
6.25%
2
40.00%
Len Brown
1
1.25%
1
20.00%
Total
80
100.00%
5
100.00%

/******************************************************************************
 *
 * 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);
}

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61
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44.44%
Rafael J. Wysocki
16
14.29%
1
11.11%
Lv Zheng
15
13.39%
1
11.11%
Len Brown
12
10.71%
1
11.11%
Robert Moore
4
3.57%
1
11.11%
Linus Torvalds
4
3.57%
1
11.11%
Total
112
100.00%
9
100.00%

/******************************************************************************
 *
 * 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);
}

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Len Brown
34
37.78%
2
22.22%
Andy Grover
32
35.56%
3
33.33%
Rafael J. Wysocki
16
17.78%
1
11.11%
Robert Moore
5
5.56%
2
22.22%
Linus Torvalds
3
3.33%
1
11.11%
Total
90
100.00%
9
100.00%

/******************************************************************************
 *
 * 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);
	status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL);
	return_ACPI_STATUS(status);
}

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Len Brown
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60.53%
3
33.33%
Robert Moore
6
15.79%
3
33.33%
Andy Grover
6
15.79%
2
22.22%
Linus Torvalds
3
7.89%
1
11.11%
Total
38
100.00%
9
100.00%

/******************************************************************************
 *
 * 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);
}

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Len Brown
23
79.31%
3
37.50%
Robert Moore
4
13.79%
3
37.50%
Andy Grover
2
6.90%
2
25.00%
Total
29
100.00%
8
100.00%

/******************************************************************************
 *
 * 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);
}

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Len Brown
14
48.28%
3
33.33%
Andy Grover
11
37.93%
3
33.33%
Robert Moore
4
13.79%
3
33.33%
Total
29
100.00%
9
100.00%

#endif				/* !ACPI_REDUCED_HARDWARE */
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331
30.85%
8
16.33%
Rafael J. Wysocki
195
18.17%
5
10.20%
Robert Moore
172
16.03%
11
22.45%
Len Brown
126
11.74%
8
16.33%
Lv Zheng
119
11.09%
7
14.29%
Linus Torvalds (pre-git)
62
5.78%
1
2.04%
Linus Torvalds
35
3.26%
3
6.12%
Lin Ming
16
1.49%
3
6.12%
Alexey Y. Starikovskiy
12
1.12%
1
2.04%
Feng Tang
4
0.37%
1
2.04%
Patrick Mochel
1
0.09%
1
2.04%
Total
1073
100.00%
49
100.00%
Directory: drivers/acpi/acpica

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