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Diffstat (limited to 'drivers/acpi/hardware/hwgpe.c')
-rw-r--r--drivers/acpi/hardware/hwgpe.c444
1 files changed, 444 insertions, 0 deletions
diff --git a/drivers/acpi/hardware/hwgpe.c b/drivers/acpi/hardware/hwgpe.c
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index 00000000000..9ac1d639bf5
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+++ b/drivers/acpi/hardware/hwgpe.c
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+
+/******************************************************************************
+ *
+ * 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);
+}
+
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