示例#1
0
acpi_status
acpi_get_object_info (
	acpi_handle             handle,
	acpi_device_info        *info)
{
	acpi_device_id          hid;
	acpi_device_id          uid;
	acpi_status             status;
	u32                     device_status = 0;
	acpi_integer            address = 0;
	acpi_namespace_node     *node;


	/* Parameter validation */

	if (!handle || !info) {
		return (AE_BAD_PARAMETER);
	}

	acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);

	node = acpi_ns_map_handle_to_node (handle);
	if (!node) {
		acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
		return (AE_BAD_PARAMETER);
	}

	info->type      = node->type;
	info->name      = node->name;

	acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);

	/*
	 * If not a device, we are all done.
	 */
	if (info->type != ACPI_TYPE_DEVICE) {
		return (AE_OK);
	}


	/*
	 * Get extra info for ACPI devices only.  Run the
	 * _HID, _UID, _STA, and _ADR methods.  Note: none
	 * of these methods are required, so they may or may
	 * not be present.  The Info->Valid bits are used
	 * to indicate which methods ran successfully.
	 */
	info->valid = 0;

	/* Execute the _HID method and save the result */

	status = acpi_ut_execute_HID (node, &hid);
	if (ACPI_SUCCESS (status)) {
		STRNCPY (info->hardware_id, hid.buffer, sizeof(info->hardware_id));

		info->valid |= ACPI_VALID_HID;
	}

	/* Execute the _UID method and save the result */

	status = acpi_ut_execute_UID (node, &uid);
	if (ACPI_SUCCESS (status)) {
		STRCPY (info->unique_id, uid.buffer);

		info->valid |= ACPI_VALID_UID;
	}

	/*
	 * Execute the _STA method and save the result
	 * _STA is not always present
	 */
	status = acpi_ut_execute_STA (node, &device_status);
	if (ACPI_SUCCESS (status)) {
		info->current_status = device_status;
		info->valid |= ACPI_VALID_STA;
	}

	/*
	 * Execute the _ADR method and save result if successful
	 * _ADR is not always present
	 */
	status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR,
			  node, &address);

	if (ACPI_SUCCESS (status)) {
		info->address = address;
		info->valid |= ACPI_VALID_ADR;
	}

	return (AE_OK);
}
示例#2
0
文件: nsxfname.c 项目: E-LLP/n900
/******************************************************************************
 *
 * FUNCTION:    acpi_get_object_info
 *
 * PARAMETERS:  Handle          - Object Handle
 *              Buffer          - Where the info is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Returns information about an object as gleaned from the
 *              namespace node and possibly by running several standard
 *              control methods (Such as in the case of a device.)
 *
 ******************************************************************************/
acpi_status
acpi_get_object_info(acpi_handle handle, struct acpi_buffer * buffer)
{
	acpi_status status;
	struct acpi_namespace_node *node;
	struct acpi_device_info *info;
	struct acpi_device_info *return_info;
	struct acpi_compatible_id_list *cid_list = NULL;
	acpi_size size;

	/* Parameter validation */

	if (!handle || !buffer) {
		return (AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(buffer);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_device_info));
	if (!info) {
		return (AE_NO_MEMORY);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	node = acpi_ns_map_handle_to_node(handle);
	if (!node) {
		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		status = AE_BAD_PARAMETER;
		goto cleanup;
	}

	/* Init return structure */

	size = sizeof(struct acpi_device_info);

	info->type = node->type;
	info->name = node->name.integer;
	info->valid = 0;

	if (node->type == ACPI_TYPE_METHOD) {
		info->param_count = node->object->method.param_count;
	}

	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* If not a device, we are all done */

	if (info->type == ACPI_TYPE_DEVICE) {
		/*
		 * Get extra info for ACPI Devices objects only:
		 * Run the Device _HID, _UID, _CID, _STA, _ADR and _sx_d methods.
		 *
		 * Note: none of these methods are required, so they may or may
		 * not be present for this device.  The Info->Valid bitfield is used
		 * to indicate which methods were found and ran successfully.
		 */

		/* Execute the Device._HID method */

		status = acpi_ut_execute_HID(node, &info->hardware_id);
		if (ACPI_SUCCESS(status)) {
			info->valid |= ACPI_VALID_HID;
		}

		/* Execute the Device._UID method */

		status = acpi_ut_execute_UID(node, &info->unique_id);
		if (ACPI_SUCCESS(status)) {
			info->valid |= ACPI_VALID_UID;
		}

		/* Execute the Device._CID method */

		status = acpi_ut_execute_CID(node, &cid_list);
		if (ACPI_SUCCESS(status)) {
			size += cid_list->size;
			info->valid |= ACPI_VALID_CID;
		}

		/* Execute the Device._STA method */

		status = acpi_ut_execute_STA(node, &info->current_status);
		if (ACPI_SUCCESS(status)) {
			info->valid |= ACPI_VALID_STA;
		}

		/* Execute the Device._ADR method */

		status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node,
							 &info->address);
		if (ACPI_SUCCESS(status)) {
			info->valid |= ACPI_VALID_ADR;
		}

		/* Execute the Device._sx_d methods */

		status = acpi_ut_execute_sxds(node, info->highest_dstates);
		if (ACPI_SUCCESS(status)) {
			info->valid |= ACPI_VALID_SXDS;
		}
	}

	/* Validate/Allocate/Clear caller buffer */

	status = acpi_ut_initialize_buffer(buffer, size);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* Populate the return buffer */

	return_info = buffer->pointer;
	ACPI_MEMCPY(return_info, info, sizeof(struct acpi_device_info));

	if (cid_list) {
		ACPI_MEMCPY(&return_info->compatibility_id, cid_list,
			    cid_list->size);
	}

      cleanup:
	ACPI_FREE(info);
	if (cid_list) {
		ACPI_FREE(cid_list);
	}
	return (status);
}
示例#3
0
文件: nsxfname.c 项目: Ersel16/linux
acpi_status
acpi_get_object_info(acpi_handle handle,
		     struct acpi_device_info **return_buffer)
{
	struct acpi_namespace_node *node;
	struct acpi_device_info *info;
	struct acpi_pnp_device_id_list *cid_list = NULL;
	struct acpi_pnp_device_id *hid = NULL;
	struct acpi_pnp_device_id *uid = NULL;
	struct acpi_pnp_device_id *sub = NULL;
	struct acpi_pnp_device_id *cls = NULL;
	char *next_id_string;
	acpi_object_type type;
	acpi_name name;
	u8 param_count = 0;
	u16 valid = 0;
	u32 info_size;
	u32 i;
	acpi_status status;

	/* Parameter validation */

	if (!handle || !return_buffer) {
		return (AE_BAD_PARAMETER);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	node = acpi_ns_validate_handle(handle);
	if (!node) {
		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		return (AE_BAD_PARAMETER);
	}

	/* Get the namespace node data while the namespace is locked */

	info_size = sizeof(struct acpi_device_info);
	type = node->type;
	name = node->name.integer;

	if (node->type == ACPI_TYPE_METHOD) {
		param_count = node->object->method.param_count;
	}

	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
		/*
		 * Get extra info for ACPI Device/Processor objects only:
		 * Run the Device _HID, _UID, _SUB, _CID, and _CLS methods.
		 *
		 * Note: none of these methods are required, so they may or may
		 * not be present for this device. The Info->Valid bitfield is used
		 * to indicate which methods were found and run successfully.
		 */

		/* Execute the Device._HID method */

		status = acpi_ut_execute_HID(node, &hid);
		if (ACPI_SUCCESS(status)) {
			info_size += hid->length;
			valid |= ACPI_VALID_HID;
		}

		/* Execute the Device._UID method */

		status = acpi_ut_execute_UID(node, &uid);
		if (ACPI_SUCCESS(status)) {
			info_size += uid->length;
			valid |= ACPI_VALID_UID;
		}

		/* Execute the Device._SUB method */

		status = acpi_ut_execute_SUB(node, &sub);
		if (ACPI_SUCCESS(status)) {
			info_size += sub->length;
			valid |= ACPI_VALID_SUB;
		}

		/* Execute the Device._CID method */

		status = acpi_ut_execute_CID(node, &cid_list);
		if (ACPI_SUCCESS(status)) {

			/* Add size of CID strings and CID pointer array */

			info_size +=
			    (cid_list->list_size -
			     sizeof(struct acpi_pnp_device_id_list));
			valid |= ACPI_VALID_CID;
		}

		/* Execute the Device._CLS method */

		status = acpi_ut_execute_CLS(node, &cls);
		if (ACPI_SUCCESS(status)) {
			info_size += cls->length;
			valid |= ACPI_VALID_CLS;
		}
	}

	/*
	 * Now that we have the variable-length data, we can allocate the
	 * return buffer
	 */
	info = ACPI_ALLOCATE_ZEROED(info_size);
	if (!info) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Get the fixed-length data */

	if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
		/*
		 * Get extra info for ACPI Device/Processor objects only:
		 * Run the _STA, _ADR and, sx_w, and _sx_d methods.
		 *
		 * Notes: none of these methods are required, so they may or may
		 * not be present for this device. The Info->Valid bitfield is used
		 * to indicate which methods were found and run successfully.
		 *
		 * For _STA, if the method does not exist, then (as per the ACPI
		 * specification), the returned current_status flags will indicate
		 * that the device is present/functional/enabled. Otherwise, the
		 * current_status flags reflect the value returned from _STA.
		 */

		/* Execute the Device._STA method */

		status = acpi_ut_execute_STA(node, &info->current_status);
		if (ACPI_SUCCESS(status)) {
			valid |= ACPI_VALID_STA;
		}

		/* Execute the Device._ADR method */

		status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node,
							 &info->address);
		if (ACPI_SUCCESS(status)) {
			valid |= ACPI_VALID_ADR;
		}

		/* Execute the Device._sx_w methods */

		status = acpi_ut_execute_power_methods(node,
						       acpi_gbl_lowest_dstate_names,
						       ACPI_NUM_sx_w_METHODS,
						       info->lowest_dstates);
		if (ACPI_SUCCESS(status)) {
			valid |= ACPI_VALID_SXWS;
		}

		/* Execute the Device._sx_d methods */

		status = acpi_ut_execute_power_methods(node,
						       acpi_gbl_highest_dstate_names,
						       ACPI_NUM_sx_d_METHODS,
						       info->highest_dstates);
		if (ACPI_SUCCESS(status)) {
			valid |= ACPI_VALID_SXDS;
		}
	}

	/*
	 * Create a pointer to the string area of the return buffer.
	 * Point to the end of the base struct acpi_device_info structure.
	 */
	next_id_string = ACPI_CAST_PTR(char, info->compatible_id_list.ids);
	if (cid_list) {

		/* Point past the CID PNP_DEVICE_ID array */

		next_id_string +=
		    ((acpi_size) cid_list->count *
		     sizeof(struct acpi_pnp_device_id));
	}

	/*
	 * Copy the HID, UID, SUB, and CIDs to the return buffer.
	 * The variable-length strings are copied to the reserved area
	 * at the end of the buffer.
	 *
	 * For HID and CID, check if the ID is a PCI Root Bridge.
	 */
	if (hid) {
		next_id_string = acpi_ns_copy_device_id(&info->hardware_id,
							hid, next_id_string);

		if (acpi_ut_is_pci_root_bridge(hid->string)) {
			info->flags |= ACPI_PCI_ROOT_BRIDGE;
		}
	}

	if (uid) {
		next_id_string = acpi_ns_copy_device_id(&info->unique_id,
							uid, next_id_string);
	}

	if (sub) {
		next_id_string = acpi_ns_copy_device_id(&info->subsystem_id,
							sub, next_id_string);
	}

	if (cid_list) {
		info->compatible_id_list.count = cid_list->count;
		info->compatible_id_list.list_size = cid_list->list_size;

		/* Copy each CID */

		for (i = 0; i < cid_list->count; i++) {
			next_id_string =
			    acpi_ns_copy_device_id(&info->compatible_id_list.
						   ids[i], &cid_list->ids[i],
						   next_id_string);

			if (acpi_ut_is_pci_root_bridge(cid_list->ids[i].string)) {
				info->flags |= ACPI_PCI_ROOT_BRIDGE;
			}
		}
	}

	if (cls) {
		next_id_string = acpi_ns_copy_device_id(&info->class_code,
							cls, next_id_string);
	}

	/* Copy the fixed-length data */

	info->info_size = info_size;
	info->type = type;
	info->name = name;
	info->param_count = param_count;
	info->valid = valid;

	*return_buffer = info;
	status = AE_OK;

cleanup:
	if (hid) {
		ACPI_FREE(hid);
	}
	if (uid) {
		ACPI_FREE(uid);
	}
	if (sub) {
		ACPI_FREE(sub);
	}
	if (cid_list) {
		ACPI_FREE(cid_list);
	}
	if (cls) {
		ACPI_FREE(cls);
	}
	return (status);
}