up->restartcnt = 0;
USB_ATTACH(uhub){	USB_ATTACH_START(uhub, sc, uaa);	usbd_device_handle dev = uaa->device;	char devinfo[1024];	usbd_status err;	struct usbd_hub *hub;	usb_device_request_t req;	usb_hub_descriptor_t hubdesc;	int p, port, nports, nremov, pwrdly;	usbd_interface_handle iface;	usb_endpoint_descriptor_t *ed;	DPRINTFN(1,("uhub_attach\n"));	sc->sc_hub = dev;	usbd_devinfo(dev, 1, devinfo, sizeof devinfo);	USB_ATTACH_SETUP;	printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo);	err = usbd_set_config_index(dev, 0, 1);	if (err) {		DPRINTF(("%s: configuration failed, error=%s\n",			 USBDEVNAME(sc->sc_dev), usbd_errstr(err)));		USB_ATTACH_ERROR_RETURN;	}	if (dev->depth > USB_HUB_MAX_DEPTH) {		printf("%s: hub depth (%d) exceeded, hub ignored\n",		       USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH);		USB_ATTACH_ERROR_RETURN;	}	/* Get hub descriptor. */	req.bmRequestType = UT_READ_CLASS_DEVICE;	req.bRequest = UR_GET_DESCRIPTOR;	USETW(req.wValue, 0);	USETW(req.wIndex, 0);	USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);	DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));	err = usbd_do_request(dev, &req, &hubdesc);	nports = hubdesc.bNbrPorts;	if (!err && nports > 7) {		USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);		err = usbd_do_request(dev, &req, &hubdesc);	}	if (err) {		DPRINTF(("%s: getting hub descriptor failed, error=%s\n",			 USBDEVNAME(sc->sc_dev), usbd_errstr(err)));		USB_ATTACH_ERROR_RETURN;	}	for (nremov = 0, port = 1; port <= nports; port++)		if (!UHD_NOT_REMOV(&hubdesc, port))			nremov++;	printf("%s: %d port%s with %d removable, %s powered\n",	       USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "",	       nremov, dev->self_powered ? "self" : "bus");	hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),		     M_USBDEV, M_NOWAIT);	if (hub == NULL)		USB_ATTACH_ERROR_RETURN;	dev->hub = hub;	dev->hub->hubsoftc = sc;	hub->explore = uhub_explore;	hub->hubdesc = hubdesc;	DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, "		    "parent->selfpowered=%d\n",		 dev->self_powered, dev->powersrc->parent,		 dev->powersrc->parent ?		 dev->powersrc->parent->self_powered : 0));	if (!dev->self_powered && dev->powersrc->parent != NULL &&	    !dev->powersrc->parent->self_powered) {		printf("%s: bus powered hub connected to bus powered hub, "		       "ignored\n", USBDEVNAME(sc->sc_dev));		goto bad;	}	/* Set up interrupt pipe. */	err = usbd_device2interface_handle(dev, 0, &iface);	if (err) {		printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));		goto bad;	}	ed = usbd_interface2endpoint_descriptor(iface, 0);	if (ed == NULL) {		printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));		goto bad;	}	if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {		printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));		goto bad;	}	err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,		  USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status,		  sizeof(sc->sc_status), uhub_intr, UHUB_INTR_INTERVAL);	if (err) {		printf("%s: cannot open interrupt pipe\n",		       USBDEVNAME(sc->sc_dev));		goto bad;	}	/* Wait with power off for a while. */	usbd_delay_ms(dev, USB_POWER_DOWN_TIME);	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev));	/*	 * To have the best chance of success we do things in the exact same	 * order as Windoze98.  This should not be necessary, but some	 * devices do not follow the USB specs to the letter.	 *	 * These are the events on the bus when a hub is attached:	 *  Get device and config descriptors (see attach code)	 *  Get hub descriptor (see above)	 *  For all ports	 *     turn on power	 *     wait for power to become stable	 * (all below happens in explore code)	 *  For all ports	 *     clear C_PORT_CONNECTION	 *  For all ports	 *     get port status	 *     if device connected	 *        wait 100 ms	 *        turn on reset	 *        wait	 *        clear C_PORT_RESET	 *        get port status	 *        proceed with device attachment	 */	/* Set up data structures */	for (p = 0; p < nports; p++) {		struct usbd_port *up = &hub->ports[p];		up->device = 0;		up->parent = dev;		up->portno = p+1;		if (dev->self_powered)			/* Self powered hub, give ports maximum current. */			up->power = USB_MAX_POWER;		else			up->power = USB_MIN_POWER;	}	/* XXX should check for none, individual, or ganged power? */	pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR	    + USB_EXTRA_POWER_UP_TIME;	for (port = 1; port <= nports; port++) {		/* Turn the power on. */		err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);		if (err)			printf("%s: port %d power on failed, %s\n",			       USBDEVNAME(sc->sc_dev), port,			       usbd_errstr(err));		DPRINTF(("usb_init_port: turn on port %d power\n", port));		/* Wait for stable power. */		usbd_delay_ms(dev, pwrdly);	}	/* The usual exploration will finish the setup. */	sc->sc_running = 1;	USB_ATTACH_SUCCESS_RETURN; bad:	free(hub, M_USBDEV);	dev->hub = 0;	USB_ATTACH_ERROR_RETURN;}