diff options
Diffstat (limited to 'drivers/acpi/hardware/hwgpe.c')
| -rw-r--r-- | drivers/acpi/hardware/hwgpe.c | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/drivers/acpi/hardware/hwgpe.c b/drivers/acpi/hardware/hwgpe.c new file mode 100644 index 0000000..9ac1d63 --- /dev/null +++ b/drivers/acpi/hardware/hwgpe.c @@ -0,0 +1,444 @@ + +/****************************************************************************** + * + * Module Name: hwgpe - Low level GPE enable/disable/clear functions + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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 <acpi/acevents.h> + +#define _COMPONENT ACPI_HARDWARE + ACPI_MODULE_NAME ("hwgpe") + + +/****************************************************************************** + * + * FUNCTION: acpi_hw_write_gpe_enable_reg + * + * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled + * + * RETURN: Status + * + * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must + * already be cleared or set in the parent register + * enable_for_run mask. + * + ******************************************************************************/ + +acpi_status +acpi_hw_write_gpe_enable_reg ( + struct acpi_gpe_event_info *gpe_event_info) +{ + struct acpi_gpe_register_info *gpe_register_info; + acpi_status status; + + + 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 the entire GPE (runtime) enable register */ + + status = acpi_hw_low_level_write (8, gpe_register_info->enable_for_run, + &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) +{ + acpi_status status; + + + ACPI_FUNCTION_ENTRY (); + + + /* + * Write a one to the appropriate bit in the status register to + * clear this GPE. + */ + status = acpi_hw_low_level_write (8, gpe_event_info->register_bit, + &gpe_event_info->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. + * + ******************************************************************************/ +#ifdef ACPI_FUTURE_USAGE +acpi_status +acpi_hw_get_gpe_status ( + struct acpi_gpe_event_info *gpe_event_info, + acpi_event_status *event_status) +{ + u32 in_byte; + u8 register_bit; + struct acpi_gpe_register_info *gpe_register_info; + acpi_status status; + acpi_event_status local_event_status = 0; + + + ACPI_FUNCTION_ENTRY (); + + + if (!event_status) { + return (AE_BAD_PARAMETER); + } + + /* 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 = gpe_event_info->register_bit; + + /* 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 active (status bit == 1)? */ + + status = acpi_hw_low_level_read (8, &in_byte, &gpe_register_info->status_address); + if (ACPI_FAILURE (status)) { + goto unlock_and_exit; + } + + if (register_bit & in_byte) { + local_event_status |= ACPI_EVENT_FLAG_SET; + } + + /* Set return value */ + + (*event_status) = local_event_status; + + +unlock_and_exit: + return (status); +} +#endif /* ACPI_FUTURE_USAGE */ + + +/****************************************************************************** + * + * 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 GPE block + * + ******************************************************************************/ + +acpi_status +acpi_hw_disable_gpe_block ( + struct acpi_gpe_xrupt_info *gpe_xrupt_info, + struct acpi_gpe_block_info *gpe_block) +{ + 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_low_level_write (8, 0x00, + &gpe_block->register_info[i].enable_address); + 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 GPE block + * + ******************************************************************************/ + +acpi_status +acpi_hw_clear_gpe_block ( + struct acpi_gpe_xrupt_info *gpe_xrupt_info, + struct acpi_gpe_block_info *gpe_block) +{ + 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_low_level_write (8, 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 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) +{ + u32 i; + acpi_status status; + + + /* NOTE: assumes that all GPEs are currently disabled */ + + /* Examine each GPE Register within the block */ + + for (i = 0; i < gpe_block->register_count; i++) { + if (!gpe_block->register_info[i].enable_for_run) { + continue; + } + + /* Enable all "runtime" GPEs in this register */ + + status = acpi_hw_low_level_write (8, gpe_block->register_info[i].enable_for_run, + &gpe_block->register_info[i].enable_address); + 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 GPE block. (Includes + * combination wake/run GPEs.) + * + ******************************************************************************/ + +acpi_status +acpi_hw_enable_wakeup_gpe_block ( + struct acpi_gpe_xrupt_info *gpe_xrupt_info, + struct acpi_gpe_block_info *gpe_block) +{ + u32 i; + acpi_status status; + + + /* Examine each GPE Register within the block */ + + for (i = 0; i < gpe_block->register_count; i++) { + if (!gpe_block->register_info[i].enable_for_wake) { + continue; + } + + /* Enable all "wake" GPEs in this register */ + + status = acpi_hw_low_level_write (8, gpe_block->register_info[i].enable_for_wake, + &gpe_block->register_info[i].enable_address); + if (ACPI_FAILURE (status)) { + return (status); + } + } + + return (AE_OK); +} + + +/****************************************************************************** + * + * FUNCTION: acpi_hw_disable_all_gpes + * + * PARAMETERS: Flags - ACPI_NOT_ISR or ACPI_ISR + * + * RETURN: Status + * + * DESCRIPTION: Disable and clear all GPEs + * + ******************************************************************************/ + +acpi_status +acpi_hw_disable_all_gpes ( + u32 flags) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("hw_disable_all_gpes"); + + + status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block, flags); + status = acpi_ev_walk_gpe_list (acpi_hw_clear_gpe_block, flags); + return_ACPI_STATUS (status); +} + + +/****************************************************************************** + * + * FUNCTION: acpi_hw_enable_all_runtime_gpes + * + * PARAMETERS: Flags - ACPI_NOT_ISR or ACPI_ISR + * + * RETURN: Status + * + * DESCRIPTION: Enable all GPEs of the given type + * + ******************************************************************************/ + +acpi_status +acpi_hw_enable_all_runtime_gpes ( + u32 flags) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("hw_enable_all_runtime_gpes"); + + + status = acpi_ev_walk_gpe_list (acpi_hw_enable_runtime_gpe_block, flags); + return_ACPI_STATUS (status); +} + + +/****************************************************************************** + * + * FUNCTION: acpi_hw_enable_all_wakeup_gpes + * + * PARAMETERS: Flags - ACPI_NOT_ISR or ACPI_ISR + * + * RETURN: Status + * + * DESCRIPTION: Enable all GPEs of the given type + * + ******************************************************************************/ + +acpi_status +acpi_hw_enable_all_wakeup_gpes ( + u32 flags) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("hw_enable_all_wakeup_gpes"); + + + status = acpi_ev_walk_gpe_list (acpi_hw_enable_wakeup_gpe_block, flags); + return_ACPI_STATUS (status); +} + |
