/*******************************************************************************
*
* FUNCTION: acpi_set_gpe_type
*
* PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block
* Type - New GPE type
*
* RETURN: Status
*
* DESCRIPTION: Set the type of an individual GPE
*
******************************************************************************/
acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE(acpi_set_gpe_type);
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
return_ACPI_STATUS(AE_OK);
}
/* Set the new type (will disable GPE if currently enabled) */
status = acpi_ev_set_gpe_type(gpe_event_info, type);
unlock_and_exit:
return_ACPI_STATUS(status);
}
static acpi_status
acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
u32 level, void *info, void **return_value)
{
struct acpi_gpe_walk_info *gpe_info = (void *)info;
struct acpi_namespace_node *gpe_device;
struct acpi_gpe_block_info *gpe_block;
struct acpi_namespace_node *target_gpe_device;
struct acpi_gpe_event_info *gpe_event_info;
union acpi_operand_object *pkg_desc;
union acpi_operand_object *obj_desc;
u32 gpe_number;
acpi_status status;
ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
/* Check for a _PRW method under this device */
status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW,
ACPI_BTYPE_PACKAGE, &pkg_desc);
if (ACPI_FAILURE(status)) {
/* Ignore all errors from _PRW, we don't want to abort the subsystem */
return_ACPI_STATUS(AE_OK);
}
/* The returned _PRW package must have at least two elements */
if (pkg_desc->package.count < 2) {
goto cleanup;
}
/* Extract pointers from the input context */
gpe_device = gpe_info->gpe_device;
gpe_block = gpe_info->gpe_block;
/*
* The _PRW object must return a package, we are only interested
* in the first element
*/
obj_desc = pkg_desc->package.elements[0];
if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) {
/* Use FADT-defined GPE device (from definition of _PRW) */
target_gpe_device = acpi_gbl_fadt_gpe_device;
/* Integer is the GPE number in the FADT described GPE blocks */
gpe_number = (u32) obj_desc->integer.value;
} else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) {
/* Package contains a GPE reference and GPE number within a GPE block */
if ((obj_desc->package.count < 2) ||
(ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) !=
ACPI_TYPE_LOCAL_REFERENCE)
|| (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) !=
ACPI_TYPE_INTEGER)) {
goto cleanup;
}
/* Get GPE block reference and decode */
target_gpe_device =
obj_desc->package.elements[0]->reference.node;
gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
} else {
/* Unknown type, just ignore it */
goto cleanup;
}
/*
* Is this GPE within this block?
*
* TRUE iff these conditions are true:
* 1) The GPE devices match.
* 2) The GPE index(number) is within the range of the Gpe Block
* associated with the GPE device.
*/
if ((gpe_device == target_gpe_device) &&
(gpe_number >= gpe_block->block_base_number) &&
(gpe_number <
gpe_block->block_base_number + (gpe_block->register_count * 8))) {
gpe_event_info =
&gpe_block->event_info[gpe_number -
gpe_block->block_base_number];
/* Mark GPE for WAKE-ONLY but WAKE_DISABLED */
gpe_event_info->flags &=
~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED);
status =
acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
status =
acpi_ev_update_gpe_enable_masks(gpe_event_info,
ACPI_GPE_DISABLE);
}
cleanup:
acpi_ut_remove_reference(pkg_desc);
return_ACPI_STATUS(AE_OK);
}
