From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/acpi/acpica/hwgpe.c | 513 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 513 insertions(+) create mode 100644 drivers/acpi/acpica/hwgpe.c (limited to 'drivers/acpi/acpica/hwgpe.c') diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c new file mode 100644 index 000000000..2d2e2e41a --- /dev/null +++ b/drivers/acpi/acpica/hwgpe.c @@ -0,0 +1,513 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/****************************************************************************** + * + * Module Name: hwgpe - Low level GPE enable/disable/clear functions + * + * Copyright (C) 2000 - 2018, Intel Corp. + * + *****************************************************************************/ + +#include +#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_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); +} + +#endif /* !ACPI_REDUCED_HARDWARE */ -- cgit v1.2.3