acpi_status acpi_enable(void)
{
acpi_status status;
+ int retry;
ACPI_FUNCTION_TRACE(acpi_enable);
/* Sanity check that transition succeeded */
- if (acpi_hw_get_mode() != ACPI_SYS_MODE_ACPI) {
- ACPI_ERROR((AE_INFO,
- "Hardware did not enter ACPI mode"));
- return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+ for (retry = 0; retry < 30000; ++retry) {
+ if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+ if (retry != 0)
+ ACPI_WARNING((AE_INFO,
+ "Platform took > %d00 usec to enter ACPI mode", retry));
+ return_ACPI_STATUS(AE_OK);
+ }
+ acpi_os_stall(100); /* 100 usec */
}
- ACPI_DEBUG_PRINT((ACPI_DB_INIT,
- "Transition to ACPI mode successful\n"));
-
- return_ACPI_STATUS(AE_OK);
+ ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
+ return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
}
ACPI_EXPORT_SYMBOL(acpi_enable)
ACPI_EXPORT_SYMBOL(acpi_enable_event)
-/*******************************************************************************
- *
- * FUNCTION: acpi_set_gpe
- *
- * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
- * gpe_number - GPE level within the GPE block
- * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
- *
- * RETURN: Status
- *
- * 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)
-{
- struct acpi_gpe_event_info *gpe_event_info;
- acpi_status status;
- acpi_cpu_flags flags;
-
- ACPI_FUNCTION_TRACE(acpi_set_gpe);
-
- 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);
- if (!gpe_event_info) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
-
- /* Perform the action */
-
- switch (action) {
- case ACPI_GPE_ENABLE:
- status = acpi_ev_enable_gpe(gpe_event_info);
- break;
-
- case ACPI_GPE_DISABLE:
- status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
- break;
-
- default:
- status = AE_BAD_PARAMETER;
- break;
- }
-
- unlock_and_exit:
- acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
- return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_set_gpe)
-
/*******************************************************************************
*
* FUNCTION: acpi_gpe_wakeup
/* 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) {
+ if (!gpe_event_info || !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
******************************************************************************/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
/* 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) {
+ status = acpi_raw_enable_gpe(gpe_event_info);
}
- 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_update_gpe_enable_mask(gpe_event_info);
- if (ACPI_SUCCESS(status)) {
- status = acpi_ev_enable_gpe(gpe_event_info);
- }
- if (ACPI_FAILURE(status)) {
- gpe_event_info->runtime_count--;
- }
- }
-
-unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
******************************************************************************/
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
/* 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 = acpi_raw_disable_gpe(gpe_event_info) ;
+ }
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ return_ACPI_STATUS(status);
+}
+ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_gpe_can_wake
+ *
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
+ * gpe_number - GPE level within the GPE block
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Set the ACPI_GPE_CAN_WAKE flag for the given GPE. If the GPE
+ * has a corresponding method and is currently enabled, disable it
+ * (GPEs with corresponding methods are enabled unconditionally
+ * during initialization, but GPEs that can wake up are expected
+ * to be initially disabled).
+ *
+ ******************************************************************************/
+acpi_status acpi_gpe_can_wake(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_gpe_can_wake);
+
+ 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);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
- /* Hardware-disable a runtime GPE on removal of the last reference */
-
- if (!gpe_event_info->runtime_count) {
- status = AE_LIMIT; /* There are no references to remove */
+ if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
goto unlock_and_exit;
}
- gpe_event_info->runtime_count--;
- if (!gpe_event_info->runtime_count) {
- status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
- if (ACPI_SUCCESS(status)) {
- status =
- acpi_hw_low_set_gpe(gpe_event_info,
- ACPI_GPE_DISABLE);
- }
- if (ACPI_FAILURE(status)) {
- gpe_event_info->runtime_count++;
- }
+ gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+ if (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD) {
+ (void)acpi_raw_disable_gpe(gpe_event_info);
}
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
-ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
+ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake)
/*******************************************************************************
*
obj_desc->device.gpe_block = gpe_block;
- /* Run the _PRW methods and enable the runtime GPEs in the new block */
+ /* Enable the runtime GPEs in the new block */
status = acpi_ev_initialize_gpe_block(node, gpe_block);
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff