*
* FUNCTION: acpi_set_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * action - Enable or disable
- * Called from ISR or not
+ * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
*
* RETURN: Status
*
- * DESCRIPTION: Enable or disable an ACPI event (general purpose)
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ * the reference count mechanism used in the acpi_enable_gpe and
+ * acpi_disable_gpe interfaces -- and should be used with care.
+ *
+ * Note: Typically used to disable a runtime GPE for short period of time,
+ * then re-enable it, without disturbing the existing reference counts. This
+ * is useful, for example, in the Embedded Controller (EC) driver.
*
******************************************************************************/
acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
{
- acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_status status;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_set_gpe);
break;
default:
- ACPI_ERROR((AE_INFO, "Invalid action\n"));
status = AE_BAD_PARAMETER;
break;
}
*
* FUNCTION: acpi_enable_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * type - Purpose the GPE will be used for
+ * gpe_type - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ * or both
*
* RETURN: Status
*
- * DESCRIPTION: Take a reference to a GPE and enable it if necessary
+ * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
+ * hardware-enabled (for runtime GPEs), or the GPE register mask
+ * is updated (for wake GPEs).
*
******************************************************************************/
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
{
acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_enable_gpe);
- if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ /* Parameter validation */
+
+ if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
goto unlock_and_exit;
}
- if (type & ACPI_GPE_TYPE_RUNTIME) {
- if (++gpe_event_info->runtime_count == 1) {
+ if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+ if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
+ status = AE_LIMIT; /* Too many references */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->runtime_count++;
+ if (gpe_event_info->runtime_count == 1) {
status = acpi_ev_enable_gpe(gpe_event_info);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
gpe_event_info->runtime_count--;
+ goto unlock_and_exit;
+ }
}
}
- if (type & ACPI_GPE_TYPE_WAKE) {
+ if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+ /* The GPE must have the ability to wake the system */
+
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
- status = AE_BAD_PARAMETER;
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ if (gpe_event_info->wakeup_count == ACPI_UINT8_MAX) {
+ status = AE_LIMIT; /* Too many references */
goto unlock_and_exit;
}
/*
- * Wake-up GPEs are only enabled right prior to putting the
- * system into a sleep state.
+ * Update the enable mask on the first wakeup reference. Wake GPEs
+ * are only hardware-enabled just before sleeping.
*/
- if (++gpe_event_info->wakeup_count == 1)
- acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ gpe_event_info->wakeup_count++;
+ if (gpe_event_info->wakeup_count == 1) {
+ (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ }
}
unlock_and_exit:
*
* FUNCTION: acpi_disable_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * type - Purpose the GPE won't be used for any more
+ * gpe_type - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ * or both
*
* RETURN: Status
*
- * DESCRIPTION: Release a reference to a GPE and disable it if necessary
+ * DESCRIPTION: Remove a reference to a GPE. When the last reference is
+ * removed, only then is the GPE disabled (for runtime GPEs), or
+ * the GPE mask bit disabled (for wake GPEs)
*
******************************************************************************/
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
{
acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_disable_gpe);
- if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ /* Parameter validation */
+
+ if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
goto unlock_and_exit;
}
- if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->runtime_count) {
- if (--gpe_event_info->runtime_count == 0)
+ /* Hardware-disable a runtime GPE on removal of the last reference */
+
+ if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+ if (!gpe_event_info->runtime_count) {
+ status = AE_LIMIT; /* There are no references to remove */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->runtime_count--;
+ if (!gpe_event_info->runtime_count) {
status = acpi_ev_disable_gpe(gpe_event_info);
+ if (ACPI_FAILURE(status)) {
+ gpe_event_info->runtime_count++;
+ goto unlock_and_exit;
+ }
+ }
}
- if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->wakeup_count) {
- /*
- * Wake-up GPEs are not enabled after leaving system sleep
- * states, so we don't need to disable them here.
- */
- if (--gpe_event_info->wakeup_count == 0)
- acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ /*
+ * Update masks for wake GPE on removal of the last reference.
+ * No need to hardware-disable wake GPEs here, they are not currently
+ * enabled.
+ */
+ if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+ if (!gpe_event_info->wakeup_count) {
+ status = AE_LIMIT; /* There are no references to remove */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->wakeup_count--;
+ if (!gpe_event_info->wakeup_count) {
+ (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ }
}
unlock_and_exit:
*
* FUNCTION: acpi_clear_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * Flags - Called from an ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
-acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
+acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_clear_gpe);
- /* Use semaphore lock if not executing at interrupt level */
-
- if (flags & ACPI_NOT_ISR) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
status = acpi_hw_clear_gpe(gpe_event_info);
unlock_and_exit:
- if (flags & ACPI_NOT_ISR) {
- (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- }
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
*
* FUNCTION: acpi_get_gpe_status
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * Flags - Called from an ISR or not
* event_status - Where the current status of the event will
* be returned
*
******************************************************************************/
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
- u32 gpe_number, u32 flags, acpi_event_status * event_status)
+ u32 gpe_number, acpi_event_status *event_status)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
- /* Use semaphore lock if not executing at interrupt level */
-
- if (flags & ACPI_NOT_ISR) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
*event_status |= ACPI_EVENT_FLAG_HANDLE;
unlock_and_exit:
- if (flags & ACPI_NOT_ISR) {
- (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- }
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
goto unlock_and_exit;
}
- /* Run the _PRW methods and enable the GPEs */
-
- status = acpi_ev_initialize_gpe_block(node, gpe_block);
- if (ACPI_FAILURE(status)) {
- goto unlock_and_exit;
- }
-
- /* Get the device_object attached to the node */
+ /* Install block in the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
- /* No object, create a new one */
-
+ /*
+ * No object, create a new one (Device nodes do not always have
+ * an attached object)
+ */
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
if (!obj_desc) {
status = AE_NO_MEMORY;
}
}
- /* Install the GPE block in the device_object */
+ /* Now install the GPE block in the device_object */
obj_desc->device.gpe_block = gpe_block;
+ /* Run the _PRW methods and enable the runtime GPEs in the new block */
+
+ status = acpi_ev_initialize_gpe_block(node, gpe_block);
+
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
/* Increment Index by the number of GPEs in this block */
- info->next_block_base_index +=
- (gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH);
+ info->next_block_base_index += gpe_block->gpe_count;
if (info->index < info->next_block_base_index) {
/*
git.openpandora.org / pandora-kernel.git / blobdiff