1 // SPDX-License-Identifier: GPL-2.0
29 	ret = fwnode_property_get_reference_args(fwnode, "usb4-host-interface",  in tb_acpi_add_link()
35 	if (dev_fwnode(&nhi->pdev->dev) != args.fwnode)  in tb_acpi_add_link()
61 		dev = dev->parent;  in tb_acpi_add_link()
72 	if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI ||  in tb_acpi_add_link()
85 		pm_runtime_get_sync(&pdev->dev);  in tb_acpi_add_link()
87 		link = device_link_add(&pdev->dev, &nhi->pdev->dev,  in tb_acpi_add_link()
92 			dev_dbg(&nhi->pdev->dev, "created link from %s\n",  in tb_acpi_add_link()
93 				dev_name(&pdev->dev));  in tb_acpi_add_link()
95 			dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n",  in tb_acpi_add_link()
96 				 dev_name(&pdev->dev));  in tb_acpi_add_link()
99 		pm_runtime_put(&pdev->dev);  in tb_acpi_add_link()
108  * tb_acpi_add_links() - Add device links based on ACPI description
119 	if (!has_acpi_companion(&nhi->pdev->dev))  in tb_acpi_add_links()
123 	 * Find all devices that have usb4-host-controller interface  in tb_acpi_add_links()
129 		dev_warn(&nhi->pdev->dev, "failed to enumerate tunneled ports\n");  in tb_acpi_add_links()
133  * tb_acpi_is_native() - Did the platform grant native TBT/USB4 control
136  * TBT/USB4. In this case software based connection manager can be used,
137  * otherwise there is firmware based connection manager running.
146  * tb_acpi_may_tunnel_usb3() - Is USB3 tunneling allowed by the platform
148  * When software based connection manager is used, this function
159  * tb_acpi_may_tunnel_dp() - Is DisplayPort tunneling allowed by the platform
161  * When software based connection manager is used, this function
172  * tb_acpi_may_tunnel_pcie() - Is PCIe tunneling allowed by the platform
174  * When software based connection manager is used, this function
185  * tb_acpi_is_xdomain_allowed() - Are XDomain connections allowed
187  * When software based connection manager is used, this function
197 /* UUID for retimer _DSM: e0053122-795b-4122-8a5e-57be1d26acb3 */
207 	struct usb4_port *usb4 = port->usb4;  in tb_acpi_retimer_set_power()
213 	if (!usb4->can_offline)  in tb_acpi_retimer_set_power()
216 	adev = ACPI_COMPANION(&usb4->dev);  in tb_acpi_retimer_set_power()
221 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
226 		return -EIO;  in tb_acpi_retimer_set_power()
229 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
244 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
250 		return -EIO;  in tb_acpi_retimer_set_power()
253 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
258 			return ret == 1 ? 0 : -EBUSY;  in tb_acpi_retimer_set_power()
263 	return -EIO;  in tb_acpi_retimer_set_power()
267  * tb_acpi_power_on_retimers() - Call platform to power on retimers
273  * spec). Note if this returns %-EBUSY it means the type-C port is in
274  * non-USB4/TBT mode (there is non-USB4/TBT device connected).
286  * tb_acpi_power_off_retimers() - Call platform to power off retimers
318 		port_adev = acpi_find_child_by_adr(ACPI_COMPANION(&parent_sw->dev),  in tb_acpi_switch_find_companion()
319 						   port->port);  in tb_acpi_switch_find_companion()
323 		struct tb_nhi *nhi = sw->tb->nhi;  in tb_acpi_switch_find_companion()
326 		parent_adev = ACPI_COMPANION(&nhi->pdev->dev);  in tb_acpi_switch_find_companion()
352 		return acpi_find_child_by_adr(ACPI_COMPANION(dev->parent),  in tb_acpi_find_companion()
353 					      tb_to_usb4_port_device(dev)->port->port);  in tb_acpi_find_companion()
365 	if (acpi_check_dsm(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_setup()
368 		usb4->can_offline = true;  in tb_acpi_setup()