| // 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); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_hw_get_gpe_block_status |
| * |
| * PARAMETERS: gpe_xrupt_info - GPE Interrupt info |
| * gpe_block - Gpe Block info |
| * |
| * 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 *ret_ptr) |
| { |
| struct acpi_gpe_register_info *gpe_register_info; |
| u64 in_enable, in_status; |
| acpi_status status; |
| u8 *ret = ret_ptr; |
| 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 |= in_enable & in_status; |
| } |
| |
| 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: None |
| * |
| * RETURN: Combined status of all GPEs |
| * |
| * DESCRIPTION: Check all enabled GPEs in all GPE blocks and return TRUE if the |
| * status bit is set for at least one of them of FALSE otherwise. |
| * |
| ******************************************************************************/ |
| |
| u8 acpi_hw_check_all_gpes(void) |
| { |
| u8 ret = 0; |
| |
| ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes); |
| |
| (void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &ret); |
| |
| return (ret != 0); |
| } |
| |
| #endif /* !ACPI_REDUCED_HARDWARE */ |