static int usb_acpi_check_port_connect_type(struct usb_device *hdev, acpi_handle handle, int port1) { enum usb_port_connect_type connect_type = USB_PORT_CONNECT_TYPE_UNKNOWN; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; struct usb_hub *hub = usb_hub_to_struct_hub(hdev); struct acpi_pld_info *pld; union acpi_object *upc; acpi_status status; int ret = 0; if (!hub) return 0; /* * According to ACPI Spec 9.13. PLD indicates whether usb port is * user visible and _UPC indicates whether it is connectable. If * the port was visible and connectable, it could be freely connected * and disconnected with USB devices. If no visible and connectable, * a usb device is directly hard-wired to the port. If no visible and * no connectable, the port would be not used. */ status = acpi_get_physical_device_location(handle, &pld); if (ACPI_FAILURE(status)) return -ENODEV; status = acpi_evaluate_object(handle, "_UPC", NULL, &buffer); upc = buffer.pointer; if (!upc || (upc->type != ACPI_TYPE_PACKAGE) || upc->package.count != 4) { ret = -EINVAL; goto out; } if (upc->package.elements[0].integer.value) if (pld->user_visible) connect_type = USB_PORT_CONNECT_TYPE_HOT_PLUG; else connect_type = USB_PORT_CONNECT_TYPE_HARD_WIRED; else if (!pld->user_visible) connect_type = USB_PORT_NOT_USED; hub->ports[port1 - 1]->connect_type = connect_type; out: ACPI_FREE(pld); kfree(upc); return ret; }
static int usb_acpi_check_pld(struct usb_device *udev, acpi_handle handle) { acpi_status status; struct acpi_pld pld; status = acpi_get_physical_device_location(handle, &pld); if (ACPI_FAILURE(status)) return -ENODEV; if (pld.user_visible) udev->removable = USB_DEVICE_REMOVABLE; else udev->removable = USB_DEVICE_FIXED; return 0; }