Release 4.7 drivers/acpi/acpica/hwgpe.c
/******************************************************************************
*
* Module Name: hwgpe - Low level GPE enable/disable/clear functions
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2016, 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));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 24 | 80.00% | 1 | 25.00% |
| feng tang | feng tang | 3 | 10.00% | 1 | 25.00% |
| lv zheng | lv zheng | 2 | 6.67% | 1 | 25.00% |
| lin ming | lin ming | 1 | 3.33% | 1 | 25.00% |
| Total | 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;
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);
}
/* Write the updated enable mask */
status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
return (status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| robert moore | robert moore | 92 | 53.80% | 3 | 30.00% |
| rafael j. wysocki | rafael j. wysocki | 70 | 40.94% | 4 | 40.00% |
| lin ming | lin ming | 9 | 5.26% | 3 | 30.00% |
| Total | 171 | 100.00% | 10 | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 25 | 36.76% | 1 | 7.14% |
| andy grover | andy grover | 19 | 27.94% | 5 | 35.71% |
| alexey starikovskiy | alexey starikovskiy | 9 | 13.24% | 1 | 7.14% |
| pre-git | pre-git | 8 | 11.76% | 1 | 7.14% |
| lin ming | lin ming | 2 | 2.94% | 2 | 14.29% |
| linus torvalds | linus torvalds | 2 | 2.94% | 1 | 7.14% |
| len brown | len brown | 2 | 2.94% | 2 | 14.29% |
| robert moore | 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 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy grover | andy grover | 60 | 29.41% | 8 | 36.36% |
| lv zheng | lv zheng | 59 | 28.92% | 4 | 18.18% |
| pre-git | pre-git | 44 | 21.57% | 1 | 4.55% |
| linus torvalds | linus torvalds | 14 | 6.86% | 2 | 9.09% |
| len brown | len brown | 12 | 5.88% | 1 | 4.55% |
| robert moore | robert moore | 7 | 3.43% | 2 | 9.09% |
| lin ming | lin ming | 4 | 1.96% | 2 | 9.09% |
| alexey starikovskiy | alexey starikovskiy | 3 | 1.47% | 1 | 4.55% |
| rafael j. wysocki | rafael j. wysocki | 1 | 0.49% | 1 | 4.55% |
| Total | 204 | 100.00% | 22 | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 40 | 100.00% | 2 | 100.00% |
| Total | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy grover | andy grover | 64 | 82.05% | 3 | 42.86% |
| linus torvalds | linus torvalds | 8 | 10.26% | 1 | 14.29% |
| robert moore | robert moore | 4 | 5.13% | 1 | 14.29% |
| len brown | len brown | 1 | 1.28% | 1 | 14.29% |
| rafael j. wysocki | rafael j. wysocki | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy grover | andy grover | 74 | 92.50% | 2 | 40.00% |
| robert moore | robert moore | 5 | 6.25% | 2 | 40.00% |
| len brown | 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;
/* 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 */
status =
acpi_hw_gpe_enable_write(gpe_register_info->enable_for_run,
gpe_register_info);
if (ACPI_FAILURE(status)) {
return (status);
}
}
return (AE_OK);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy grover | andy grover | 62 | 62.00% | 4 | 50.00% |
| rafael j. wysocki | rafael j. wysocki | 17 | 17.00% | 1 | 12.50% |
| len brown | len brown | 12 | 12.00% | 1 | 12.50% |
| linus torvalds | linus torvalds | 5 | 5.00% | 1 | 12.50% |
| robert moore | robert moore | 4 | 4.00% | 1 | 12.50% |
| Total | 100 | 100.00% | 8 | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 34 | 37.78% | 2 | 22.22% |
| andy grover | andy grover | 32 | 35.56% | 3 | 33.33% |
| rafael j. wysocki | rafael j. wysocki | 16 | 17.78% | 1 | 11.11% |
| robert moore | robert moore | 5 | 5.56% | 2 | 22.22% |
| linus torvalds | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 23 | 60.53% | 3 | 33.33% |
| robert moore | robert moore | 6 | 15.79% | 3 | 33.33% |
| andy grover | andy grover | 6 | 15.79% | 2 | 22.22% |
| linus torvalds | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 23 | 79.31% | 3 | 37.50% |
| robert moore | robert moore | 4 | 13.79% | 3 | 37.50% |
| andy grover | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| len brown | len brown | 14 | 48.28% | 3 | 33.33% |
| andy grover | andy grover | 11 | 37.93% | 3 | 33.33% |
| robert moore | robert moore | 4 | 13.79% | 3 | 33.33% |
| Total | 29 | 100.00% | 9 | 100.00% |
#endif /* !ACPI_REDUCED_HARDWARE */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andy grover | andy grover | 332 | 32.20% | 8 | 16.67% |
| rafael j. wysocki | rafael j. wysocki | 196 | 19.01% | 5 | 10.42% |
| robert moore | robert moore | 172 | 16.68% | 11 | 22.92% |
| len brown | len brown | 126 | 12.22% | 8 | 16.67% |
| lv zheng | lv zheng | 74 | 7.18% | 6 | 12.50% |
| pre-git | pre-git | 62 | 6.01% | 1 | 2.08% |
| linus torvalds | linus torvalds | 36 | 3.49% | 3 | 6.25% |
| lin ming | lin ming | 16 | 1.55% | 3 | 6.25% |
| alexey starikovskiy | alexey starikovskiy | 12 | 1.16% | 1 | 2.08% |
| feng tang | feng tang | 4 | 0.39% | 1 | 2.08% |
| patrick mochel | patrick mochel | 1 | 0.10% | 1 | 2.08% |
| Total | 1031 | 100.00% | 48 | 100.00% |
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