dd989679ec
-avoid unnecessary tree walks and port status requests: -acknowledge hub status change notifications (but do nothing) -clear cached port status change bits earlier (but not on ehci, due to an ehci driver bug) -do the ehci check on attach rather than a string comparision at runtime
692 lines
19 KiB
C
692 lines
19 KiB
C
/* $NetBSD: uhub.c,v 1.101 2008/06/16 10:37:54 drochner Exp $ */
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/* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */
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/*
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* Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (lennart@augustsson.net) at
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* Carlstedt Research & Technology.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* USB spec: http://www.usb.org/developers/docs/usbspec.zip
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.101 2008/06/16 10:37:54 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/bus.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include <dev/usb/usbdivar.h>
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#ifdef UHUB_DEBUG
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#define DPRINTF(x) if (uhubdebug) logprintf x
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#define DPRINTFN(n,x) if (uhubdebug>(n)) logprintf x
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int uhubdebug = 0;
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#else
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#define DPRINTF(x)
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#define DPRINTFN(n,x)
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#endif
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struct uhub_softc {
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USBBASEDEVICE sc_dev; /* base device */
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usbd_device_handle sc_hub; /* USB device */
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int sc_proto; /* device protocol */
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usbd_pipe_handle sc_ipipe; /* interrupt pipe */
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/* XXX second buffer needed because we can't suspend pipes yet */
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u_int8_t *sc_statusbuf;
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u_int8_t *sc_status;
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size_t sc_statuslen;
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int sc_explorepending;
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int sc_isehciroothub; /* see comment in uhub_intr() */
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u_char sc_running;
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};
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#define UHUB_IS_HIGH_SPEED(sc) ((sc)->sc_proto != UDPROTO_FSHUB)
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#define UHUB_IS_SINGLE_TT(sc) ((sc)->sc_proto == UDPROTO_HSHUBSTT)
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#define PORTSTAT_ISSET(sc, port) \
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((sc)->sc_status[(port) / 8] & (1 << ((port) % 8)))
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Static usbd_status uhub_explore(usbd_device_handle hub);
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Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status);
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/*
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* We need two attachment points:
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* hub to usb and hub to hub
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* Every other driver only connects to hubs
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*/
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int uhub_match(device_t, cfdata_t, void *);
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void uhub_attach(device_t, device_t, void *);
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void uhub_childdet(device_t, device_t);
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int uhub_detach(device_t, int);
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int uhub_activate(device_t, enum devact);
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extern struct cfdriver uhub_cd;
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CFATTACH_DECL2_NEW(uhub, sizeof(struct uhub_softc), uhub_match,
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uhub_attach, uhub_detach, uhub_activate, NULL, uhub_childdet);
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CFATTACH_DECL2_NEW(uroothub, sizeof(struct uhub_softc), uhub_match,
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uhub_attach, uhub_detach, uhub_activate, NULL, uhub_childdet);
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USB_MATCH(uhub)
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{
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USB_MATCH_START(uhub, uaa);
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DPRINTFN(5,("uhub_match, uaa=%p\n", uaa));
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/*
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* The subclass for hubs seems to be 0 for some and 1 for others,
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* so we just ignore the subclass.
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*/
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if (uaa->class == UDCLASS_HUB)
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return (UMATCH_DEVCLASS_DEVSUBCLASS);
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return (UMATCH_NONE);
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}
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USB_ATTACH(uhub)
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{
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USB_ATTACH_START(uhub, sc, uaa);
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usbd_device_handle dev = uaa->device;
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char *devinfop;
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usbd_status err;
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struct usbd_hub *hub = NULL;
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usb_device_request_t req;
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usb_hub_descriptor_t hubdesc;
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int p, port, nports, nremov, pwrdly;
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usbd_interface_handle iface;
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usb_endpoint_descriptor_t *ed;
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#if 0 /* notyet */
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struct usbd_tt *tts = NULL;
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#endif
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DPRINTFN(1,("uhub_attach\n"));
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sc->sc_dev = self;
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sc->sc_hub = dev;
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sc->sc_proto = uaa->proto;
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devinfop = usbd_devinfo_alloc(dev, 1);
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aprint_naive("\n");
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aprint_normal(": %s\n", devinfop);
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usbd_devinfo_free(devinfop);
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if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) {
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aprint_normal_dev(self, "%s transaction translator%s\n",
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UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple",
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UHUB_IS_SINGLE_TT(sc) ? "" : "s");
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}
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err = usbd_set_config_index(dev, 0, 1);
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if (err) {
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DPRINTF(("%s: configuration failed, error=%s\n",
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USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
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USB_ATTACH_ERROR_RETURN;
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}
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if (dev->depth > USB_HUB_MAX_DEPTH) {
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aprint_error_dev(self,
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"hub depth (%d) exceeded, hub ignored\n",
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USB_HUB_MAX_DEPTH);
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USB_ATTACH_ERROR_RETURN;
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}
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/* Get hub descriptor. */
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req.bmRequestType = UT_READ_CLASS_DEVICE;
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req.bRequest = UR_GET_DESCRIPTOR;
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USETW2(req.wValue, UDESC_HUB, 0);
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USETW(req.wIndex, 0);
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USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);
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DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));
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err = usbd_do_request(dev, &req, &hubdesc);
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nports = hubdesc.bNbrPorts;
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if (!err && nports > 7) {
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USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
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err = usbd_do_request(dev, &req, &hubdesc);
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}
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if (err) {
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DPRINTF(("%s: getting hub descriptor failed, error=%s\n",
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USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
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USB_ATTACH_ERROR_RETURN;
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}
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for (nremov = 0, port = 1; port <= nports; port++)
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if (!UHD_NOT_REMOV(&hubdesc, port))
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nremov++;
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aprint_verbose_dev(self, "%d port%s with %d removable, %s powered\n",
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nports, nports != 1 ? "s" : "", nremov,
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dev->self_powered ? "self" : "bus");
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if (nports == 0) {
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aprint_debug_dev(self, "no ports, hub ignored\n");
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goto bad;
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}
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hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),
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M_USBDEV, M_NOWAIT);
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if (hub == NULL)
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USB_ATTACH_ERROR_RETURN;
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dev->hub = hub;
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dev->hub->hubsoftc = sc;
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hub->explore = uhub_explore;
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hub->hubdesc = hubdesc;
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/* Set up interrupt pipe. */
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err = usbd_device2interface_handle(dev, 0, &iface);
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if (err) {
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aprint_error_dev(self, "no interface handle\n");
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goto bad;
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}
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if (UHUB_IS_HIGH_SPEED(sc) && !UHUB_IS_SINGLE_TT(sc)) {
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err = usbd_set_interface(iface, 1);
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if (err)
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aprint_error_dev(self, "can't enable multiple TTs\n");
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}
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ed = usbd_interface2endpoint_descriptor(iface, 0);
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if (ed == NULL) {
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aprint_error_dev(self, "no endpoint descriptor\n");
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goto bad;
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}
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if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
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aprint_error_dev(self, "bad interrupt endpoint\n");
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goto bad;
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}
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sc->sc_statuslen = (nports + 1 + 7) / 8;
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sc->sc_statusbuf = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT);
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if (!sc->sc_statusbuf)
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goto bad;
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sc->sc_status = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT);
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if (!sc->sc_status)
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goto bad;
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if (device_is_a(device_parent(device_parent(sc->sc_dev)), "ehci"))
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sc->sc_isehciroothub = 1;
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/* force initial scan */
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memset(sc->sc_status, 0xff, sc->sc_statuslen);
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sc->sc_explorepending = 1;
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err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,
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USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_statusbuf,
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sc->sc_statuslen, uhub_intr, USBD_DEFAULT_INTERVAL);
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if (err) {
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aprint_error_dev(self, "cannot open interrupt pipe\n");
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goto bad;
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}
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/* Wait with power off for a while. */
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usbd_delay_ms(dev, USB_POWER_DOWN_TIME);
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usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev));
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/*
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* To have the best chance of success we do things in the exact same
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* order as Windoze98. This should not be necessary, but some
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* devices do not follow the USB specs to the letter.
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*
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* These are the events on the bus when a hub is attached:
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* Get device and config descriptors (see attach code)
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* Get hub descriptor (see above)
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* For all ports
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* turn on power
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* wait for power to become stable
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* (all below happens in explore code)
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* For all ports
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* clear C_PORT_CONNECTION
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* For all ports
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* get port status
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* if device connected
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* wait 100 ms
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* turn on reset
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* wait
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* clear C_PORT_RESET
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* get port status
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* proceed with device attachment
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*/
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#if 0
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if (UHUB_IS_HIGH_SPEED(sc) && nports > 0) {
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tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) *
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sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT);
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if (!tts)
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goto bad;
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}
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#endif
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/* Set up data structures */
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for (p = 0; p < nports; p++) {
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struct usbd_port *up = &hub->ports[p];
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up->device = NULL;
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up->parent = dev;
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up->portno = p+1;
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if (dev->self_powered)
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/* Self powered hub, give ports maximum current. */
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up->power = USB_MAX_POWER;
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else
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up->power = USB_MIN_POWER;
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up->restartcnt = 0;
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up->reattach = 0;
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#if 0
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if (UHUB_IS_HIGH_SPEED(sc)) {
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up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p];
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up->tt->hub = hub;
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} else {
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up->tt = NULL;
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}
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#endif
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}
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/* XXX should check for none, individual, or ganged power? */
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pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR
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+ USB_EXTRA_POWER_UP_TIME;
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for (port = 1; port <= nports; port++) {
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/* Turn the power on. */
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err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
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if (err)
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aprint_error_dev(self, "port %d power on failed, %s\n",
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port, usbd_errstr(err));
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DPRINTF(("usb_init_port: turn on port %d power\n", port));
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}
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/* Wait for stable power if we are not a root hub */
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if (dev->powersrc->parent != NULL)
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usbd_delay_ms(dev, pwrdly);
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/* The usual exploration will finish the setup. */
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sc->sc_running = 1;
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if (!pmf_device_register(self, NULL, NULL))
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aprint_error_dev(self, "couldn't establish power handler\n");
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USB_ATTACH_SUCCESS_RETURN;
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bad:
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if (sc->sc_status)
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free(sc->sc_status, M_USBDEV);
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if (sc->sc_statusbuf)
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free(sc->sc_statusbuf, M_USBDEV);
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if (hub)
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free(hub, M_USBDEV);
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dev->hub = NULL;
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USB_ATTACH_ERROR_RETURN;
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}
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usbd_status
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uhub_explore(usbd_device_handle dev)
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{
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usb_hub_descriptor_t *hd = &dev->hub->hubdesc;
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struct uhub_softc *sc = dev->hub->hubsoftc;
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struct usbd_port *up;
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usbd_status err;
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int speed;
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int port;
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int change, status, reconnect;
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DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address));
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if (!sc->sc_running)
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return (USBD_NOT_STARTED);
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/* Ignore hubs that are too deep. */
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if (dev->depth > USB_HUB_MAX_DEPTH)
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return (USBD_TOO_DEEP);
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if (PORTSTAT_ISSET(sc, 0)) { /* hub status change */
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usb_hub_status_t hs;
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err = usbd_get_hub_status(dev, &hs);
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if (err) {
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DPRINTF(("%s: get hub status failed, err=%d\n",
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device_xname(sc->sc_dev), err));
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} else {
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/* just acknowledge */
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status = UGETW(hs.wHubStatus);
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change = UGETW(hs.wHubChange);
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if (change & UHS_LOCAL_POWER)
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usbd_clear_hub_feature(dev,
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UHF_C_HUB_LOCAL_POWER);
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if (change & UHS_OVER_CURRENT)
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usbd_clear_hub_feature(dev,
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UHF_C_HUB_OVER_CURRENT);
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}
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}
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for (port = 1; port <= hd->bNbrPorts; port++) {
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up = &dev->hub->ports[port-1];
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/* reattach is needed after firmware upload */
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reconnect = up->reattach;
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up->reattach = 0;
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status = change = 0;
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/* don't check if no change summary notification */
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if (PORTSTAT_ISSET(sc, port) || reconnect) {
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err = usbd_get_port_status(dev, port, &up->status);
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if (err) {
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DPRINTF(("uhub_explore: get port stat failed, "
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"error=%s\n", usbd_errstr(err)));
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continue;
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}
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status = UGETW(up->status.wPortStatus);
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change = UGETW(up->status.wPortChange);
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#if 0
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printf("%s port %d: s/c=%x/%x\n",
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device_xname(sc->sc_dev), port, status, change);
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#endif
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}
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if (!change && !reconnect) {
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/* No status change, just do recursive explore. */
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if (up->device != NULL && up->device->hub != NULL)
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up->device->hub->explore(up->device);
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continue;
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}
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if (change & UPS_C_PORT_ENABLED) {
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DPRINTF(("uhub_explore: C_PORT_ENABLED\n"));
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usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
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if (change & UPS_C_CONNECT_STATUS) {
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/* Ignore the port error if the device
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vanished. */
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} else if (status & UPS_PORT_ENABLED) {
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aprint_error_dev(sc->sc_dev,
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"illegal enable change, port %d\n", port);
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} else {
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/* Port error condition. */
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if (up->restartcnt) /* no message first time */
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aprint_error_dev(sc->sc_dev,
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"port error, restarting port %d\n",
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port);
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if (up->restartcnt++ < USBD_RESTART_MAX)
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goto disco;
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else
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aprint_error_dev(sc->sc_dev,
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"port error, giving up port %d\n",
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port);
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}
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}
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/* XXX handle overcurrent and resume events! */
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if (!(change & UPS_C_CONNECT_STATUS))
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continue;
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/* We have a connect status change, handle it. */
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DPRINTF(("uhub_explore: status change hub=%d port=%d\n",
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dev->address, port));
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usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION);
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/*
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* If there is already a device on the port the change status
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* must mean that is has disconnected. Looking at the
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* current connect status is not enough to figure this out
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* since a new unit may have been connected before we handle
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* the disconnect.
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*/
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disco:
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if (up->device != NULL) {
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/* Disconnected */
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DPRINTF(("uhub_explore: device addr=%d disappeared "
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"on port %d\n", up->device->address, port));
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usb_disconnect_port(up, USBDEV(sc->sc_dev));
|
|
usbd_clear_port_feature(dev, port,
|
|
UHF_C_PORT_CONNECTION);
|
|
}
|
|
if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
|
|
/* Nothing connected, just ignore it. */
|
|
DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT"
|
|
"_STATUS\n", port));
|
|
continue;
|
|
}
|
|
|
|
/* Connected */
|
|
|
|
if (!(status & UPS_PORT_POWER))
|
|
aprint_normal_dev(sc->sc_dev,
|
|
"strange, connected port %d has no power\n", port);
|
|
|
|
/* Wait for maximum device power up time. */
|
|
usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY);
|
|
|
|
/* Reset port, which implies enabling it. */
|
|
if (usbd_reset_port(dev, port, &up->status)) {
|
|
aprint_error_dev(sc->sc_dev,
|
|
"port %d reset failed\n", port);
|
|
continue;
|
|
}
|
|
/* Get port status again, it might have changed during reset */
|
|
err = usbd_get_port_status(dev, port, &up->status);
|
|
if (err) {
|
|
DPRINTF(("uhub_explore: get port status failed, "
|
|
"error=%s\n", usbd_errstr(err)));
|
|
continue;
|
|
}
|
|
status = UGETW(up->status.wPortStatus);
|
|
change = UGETW(up->status.wPortChange);
|
|
if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
|
|
/* Nothing connected, just ignore it. */
|
|
#ifdef DIAGNOSTIC
|
|
aprint_debug_dev(sc->sc_dev,
|
|
"port %d, device disappeared after reset\n", port);
|
|
#endif
|
|
continue;
|
|
}
|
|
|
|
/* Figure out device speed */
|
|
if (status & UPS_HIGH_SPEED)
|
|
speed = USB_SPEED_HIGH;
|
|
else if (status & UPS_LOW_SPEED)
|
|
speed = USB_SPEED_LOW;
|
|
else
|
|
speed = USB_SPEED_FULL;
|
|
/* Get device info and set its address. */
|
|
err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus,
|
|
dev->depth + 1, speed, port, up);
|
|
/* XXX retry a few times? */
|
|
if (err) {
|
|
DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
|
|
"error=%s\n", usbd_errstr(err)));
|
|
/* Avoid addressing problems by disabling. */
|
|
/* usbd_reset_port(dev, port, &up->status); */
|
|
|
|
/*
|
|
* The unit refused to accept a new address, or had
|
|
* some other serious problem. Since we cannot leave
|
|
* at 0 we have to disable the port instead.
|
|
*/
|
|
aprint_error_dev(sc->sc_dev,
|
|
"device problem, disabling port %d\n", port);
|
|
usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE);
|
|
} else {
|
|
/* The port set up succeeded, reset error count. */
|
|
up->restartcnt = 0;
|
|
|
|
if (up->device->hub)
|
|
up->device->hub->explore(up->device);
|
|
}
|
|
}
|
|
/* enable status change notifications again */
|
|
if (!sc->sc_isehciroothub)
|
|
memset(sc->sc_status, 0, sc->sc_statuslen);
|
|
sc->sc_explorepending = 0;
|
|
return (USBD_NORMAL_COMPLETION);
|
|
}
|
|
|
|
int
|
|
uhub_activate(device_t self, enum devact act)
|
|
{
|
|
struct uhub_softc *sc = device_private(self);
|
|
struct usbd_hub *hub = sc->sc_hub->hub;
|
|
usbd_device_handle dev;
|
|
int nports, port, i;
|
|
|
|
switch (act) {
|
|
case DVACT_ACTIVATE:
|
|
return (EOPNOTSUPP);
|
|
|
|
case DVACT_DEACTIVATE:
|
|
if (hub == NULL) /* malfunctioning hub */
|
|
break;
|
|
nports = hub->hubdesc.bNbrPorts;
|
|
for(port = 0; port < nports; port++) {
|
|
dev = hub->ports[port].device;
|
|
if (!dev)
|
|
continue;
|
|
for (i = 0; i < dev->subdevlen; i++)
|
|
if (dev->subdevs[i])
|
|
config_deactivate(dev->subdevs[i]);
|
|
}
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called from process context when the hub is gone.
|
|
* Detach all devices on active ports.
|
|
*/
|
|
USB_DETACH(uhub)
|
|
{
|
|
USB_DETACH_START(uhub, sc);
|
|
struct usbd_hub *hub = sc->sc_hub->hub;
|
|
struct usbd_port *rup;
|
|
int port, nports;
|
|
|
|
DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags));
|
|
|
|
if (hub == NULL) /* Must be partially working */
|
|
return (0);
|
|
|
|
pmf_device_deregister(self);
|
|
usbd_abort_pipe(sc->sc_ipipe);
|
|
usbd_close_pipe(sc->sc_ipipe);
|
|
|
|
nports = hub->hubdesc.bNbrPorts;
|
|
for(port = 0; port < nports; port++) {
|
|
rup = &hub->ports[port];
|
|
if (rup->device)
|
|
usb_disconnect_port(rup, self);
|
|
}
|
|
|
|
usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub,
|
|
USBDEV(sc->sc_dev));
|
|
|
|
#if 0
|
|
if (hub->ports[0].tt)
|
|
free(hub->ports[0].tt, M_USBDEV);
|
|
#endif
|
|
free(hub, M_USBDEV);
|
|
sc->sc_hub->hub = NULL;
|
|
if (sc->sc_status)
|
|
free(sc->sc_status, M_USBDEV);
|
|
if (sc->sc_statusbuf)
|
|
free(sc->sc_statusbuf, M_USBDEV);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* Called when a device has been detached from it */
|
|
void
|
|
uhub_childdet(device_t self, device_t child)
|
|
{
|
|
struct uhub_softc *sc = device_private(self);
|
|
usbd_device_handle devhub = sc->sc_hub;
|
|
usbd_device_handle dev;
|
|
int nports;
|
|
int port;
|
|
int i;
|
|
|
|
if (!devhub->hub)
|
|
/* should never happen; children are only created after init */
|
|
panic("hub not fully initialised, but child deleted?");
|
|
|
|
nports = devhub->hub->hubdesc.bNbrPorts;
|
|
for (port = 0; port < nports; port++) {
|
|
dev = devhub->hub->ports[port].device;
|
|
if (!dev)
|
|
continue;
|
|
for (i = 0; i < dev->subdevlen; i++) {
|
|
if (dev->subdevs[i] == child) {
|
|
dev->subdevs[i] = NULL;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
KASSERT(false);
|
|
}
|
|
|
|
|
|
/*
|
|
* Hub interrupt.
|
|
* This an indication that some port has changed status.
|
|
* Notify the bus event handler thread that we need
|
|
* to be explored again.
|
|
*/
|
|
void
|
|
uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr,
|
|
usbd_status status)
|
|
{
|
|
struct uhub_softc *sc = addr;
|
|
|
|
DPRINTFN(5,("uhub_intr: sc=%p\n", sc));
|
|
|
|
if (status == USBD_STALLED)
|
|
usbd_clear_endpoint_stall_async(sc->sc_ipipe);
|
|
else if (status == USBD_NORMAL_COMPLETION &&
|
|
!sc->sc_explorepending) {
|
|
/*
|
|
* Make sure the status is not overwritten in between.
|
|
* XXX we should suspend the pipe instead
|
|
*/
|
|
memcpy(sc->sc_status, sc->sc_statusbuf, sc->sc_statuslen);
|
|
sc->sc_explorepending = 1;
|
|
usb_needs_explore(sc->sc_hub);
|
|
}
|
|
/*
|
|
* XXX workaround for broken implementation of the interrupt
|
|
* pipe in EHCI root hub emulation which doesn't resend
|
|
* status change notifications until handled: force a rescan
|
|
* of the ports we touched in the last run
|
|
*/
|
|
if (status == USBD_NORMAL_COMPLETION && sc->sc_explorepending &&
|
|
sc->sc_isehciroothub)
|
|
usb_needs_explore(sc->sc_hub);
|
|
}
|