1 // SPDX-License-Identifier: GPL-2.0
26 	fwnode = fwnode_find_reference(acpi_fwnode_handle(adev), "usb4-host-interface", 0);  in tb_acpi_add_link()
31 	if (dev_fwnode(&nhi->pdev->dev) != fwnode)  in tb_acpi_add_link()
49 	 * SuperSpeed ports have this property and they are not power  in tb_acpi_add_link()
54 		dev = dev->parent;  in tb_acpi_add_link()
65 	if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI ||  in tb_acpi_add_link()
78 		pm_runtime_get_sync(&pdev->dev);  in tb_acpi_add_link()
80 		link = device_link_add(&pdev->dev, &nhi->pdev->dev,  in tb_acpi_add_link()
85 			dev_dbg(&nhi->pdev->dev, "created link from %s\n",  in tb_acpi_add_link()
86 				dev_name(&pdev->dev));  in tb_acpi_add_link()
89 			dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n",  in tb_acpi_add_link()
90 				 dev_name(&pdev->dev));  in tb_acpi_add_link()
93 		pm_runtime_put(&pdev->dev);  in tb_acpi_add_link()
102  * tb_acpi_add_links() - Add device links based on ACPI description
116 	if (!has_acpi_companion(&nhi->pdev->dev))  in tb_acpi_add_links()
120 	 * Find all devices that have usb4-host-controller interface  in tb_acpi_add_links()
126 		dev_warn(&nhi->pdev->dev, "failed to enumerate tunneled ports\n");  in tb_acpi_add_links()
134  * tb_acpi_is_native() - Did the platform grant native TBT/USB4 control
137  * TBT/USB4. In this case software based connection manager can be used,
138  * otherwise there is firmware based connection manager running.
147  * tb_acpi_may_tunnel_usb3() - Is USB3 tunneling allowed by the platform
149  * When software based connection manager is used, this function
160  * tb_acpi_may_tunnel_dp() - Is DisplayPort tunneling allowed by the platform
162  * When software based connection manager is used, this function
173  * tb_acpi_may_tunnel_pcie() - Is PCIe tunneling allowed by the platform
175  * When software based connection manager is used, this function
186  * tb_acpi_is_xdomain_allowed() - Are XDomain connections allowed
188  * When software based connection manager is used, this function
198 /* UUID for retimer _DSM: e0053122-795b-4122-8a5e-57be1d26acb3 */
206 static int tb_acpi_retimer_set_power(struct tb_port *port, bool power)  in tb_acpi_retimer_set_power()  argument
208 	struct usb4_port *usb4 = port->usb4;  in tb_acpi_retimer_set_power()
214 	if (!usb4->can_offline)  in tb_acpi_retimer_set_power()
217 	adev = ACPI_COMPANION(&usb4->dev);  in tb_acpi_retimer_set_power()
222 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
227 		return -EIO;  in tb_acpi_retimer_set_power()
230 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
233 	if (power == ret)  in tb_acpi_retimer_set_power()
236 	tb_port_dbg(port, "ACPI: calling _DSM to power %s retimers\n",  in tb_acpi_retimer_set_power()
237 		    power ? "on" : "off");  in tb_acpi_retimer_set_power()
243 	argv4[1].integer.value = power;  in tb_acpi_retimer_set_power()
245 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
251 		return -EIO;  in tb_acpi_retimer_set_power()
254 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
258 		if (power)  in tb_acpi_retimer_set_power()
259 			return ret == 1 ? 0 : -EBUSY;  in tb_acpi_retimer_set_power()
264 	return -EIO;  in tb_acpi_retimer_set_power()
268  * tb_acpi_power_on_retimers() - Call platform to power on retimers
271  * Calls platform to turn on power to all retimers behind this USB4
274  * spec). Note if this returns %-EBUSY it means the type-C port is in
275  * non-USB4/TBT mode (there is non-USB4/TBT device connected).
287  * 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()