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Diffstat (limited to 'drivers/acpi/acpica/hwgpe.c')
-rw-r--r--drivers/acpi/acpica/hwgpe.c469
1 files changed, 469 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
new file mode 100644
index 00000000000..2b4a85a839d
--- /dev/null
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -0,0 +1,469 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwgpe - Low level GPE enable/disable/clear functions
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h>
+#include <acpi/acevents.h>
+
+#define _COMPONENT ACPI_HARDWARE
+ACPI_MODULE_NAME("hwgpe")
+
+/* 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);
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_hw_low_disable_gpe
+ *
+ * PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disable a single GPE in the enable register.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+{
+ struct acpi_gpe_register_info *gpe_register_info;
+ acpi_status status;
+ u32 enable_mask;
+
+ /* 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_read(&enable_mask, &gpe_register_info->enable_address);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Clear just the bit that corresponds to this GPE */
+
+ ACPI_CLEAR_BIT(enable_mask,
+ ((u32) 1 <<
+ (gpe_event_info->gpe_number -
+ gpe_register_info->base_gpe_number)));
+
+ /* Write the updated enable mask */
+
+ status = acpi_write(enable_mask, &gpe_register_info->enable_address);
+ return (status);
+}
+
+/******************************************************************************
+ *
+ * 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_write(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;
+ u8 register_bit;
+
+ ACPI_FUNCTION_ENTRY();
+
+ register_bit = (u8)
+ (1 <<
+ (gpe_event_info->gpe_number -
+ gpe_event_info->register_info->base_gpe_number));
+
+ /*
+ * Write a one to the appropriate bit in the status register to
+ * clear this GPE.
+ */
+ status = acpi_write(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.
+ *
+ ******************************************************************************/
+
+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 = (u8)
+ (1 <<
+ (gpe_event_info->gpe_number -
+ gpe_event_info->register_info->base_gpe_number));
+
+ /* 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_read(&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);
+}
+
+/******************************************************************************
+ *
+ * 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_write(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 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_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;
+
+ /* 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_write(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 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;
+
+ /* 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_write(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: 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);
+}
+
+/******************************************************************************
+ *
+ * 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);
+}
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