/* $NetBSD: uhub.c,v 1.124 2013/09/15 15:33:47 martin Exp $ */ /* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */ /* * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Lennart Augustsson (lennart@augustsson.net) at * Carlstedt Research & Technology. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * USB spec: http://www.usb.org/developers/docs/usbspec.zip */ #include __KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.124 2013/09/15 15:33:47 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #ifdef UHUB_DEBUG #define DPRINTF(x) if (uhubdebug) printf x #define DPRINTFN(n,x) if (uhubdebug>(n)) printf x int uhubdebug = 0; #else #define DPRINTF(x) #define DPRINTFN(n,x) #endif struct uhub_softc { device_t sc_dev; /* base device */ usbd_device_handle sc_hub; /* USB device */ int sc_proto; /* device protocol */ usbd_pipe_handle sc_ipipe; /* interrupt pipe */ /* XXX second buffer needed because we can't suspend pipes yet */ u_int8_t *sc_statusbuf; u_int8_t *sc_status; size_t sc_statuslen; int sc_explorepending; int sc_isehciroothub; /* see comment in uhub_intr() */ u_char sc_running; }; #define UHUB_IS_HIGH_SPEED(sc) ((sc)->sc_proto != UDPROTO_FSHUB) #define UHUB_IS_SINGLE_TT(sc) ((sc)->sc_proto == UDPROTO_HSHUBSTT) #define PORTSTAT_ISSET(sc, port) \ ((sc)->sc_status[(port) / 8] & (1 << ((port) % 8))) Static usbd_status uhub_explore(usbd_device_handle hub); Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status); /* * We need two attachment points: * hub to usb and hub to hub * Every other driver only connects to hubs */ int uhub_match(device_t, cfdata_t, void *); void uhub_attach(device_t, device_t, void *); int uhub_rescan(device_t, const char *, const int *); void uhub_childdet(device_t, device_t); int uhub_detach(device_t, int); extern struct cfdriver uhub_cd; CFATTACH_DECL3_NEW(uhub, sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, NULL, uhub_rescan, uhub_childdet, DVF_DETACH_SHUTDOWN); CFATTACH_DECL2_NEW(uroothub, sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, NULL, uhub_rescan, uhub_childdet); /* * Setting this to 1 makes sure than an uhub attaches even at higher * priority than ugen when ugen_override is set to 1. This allows to * probe the whole USB bus and attach functions with ugen. */ int uhub_ubermatch = 0; int uhub_match(device_t parent, cfdata_t match, void *aux) { struct usb_attach_arg *uaa = aux; int matchvalue; if (uhub_ubermatch) matchvalue = UMATCH_HIGHEST+1; else matchvalue = UMATCH_DEVCLASS_DEVSUBCLASS; DPRINTFN(5,("uhub_match, uaa=%p\n", uaa)); /* * The subclass for hubs seems to be 0 for some and 1 for others, * so we just ignore the subclass. */ if (uaa->class == UDCLASS_HUB) return (matchvalue); return (UMATCH_NONE); } void uhub_attach(device_t parent, device_t self, void *aux) { struct uhub_softc *sc = device_private(self); struct usb_attach_arg *uaa = aux; usbd_device_handle dev = uaa->device; char *devinfop; usbd_status err; struct usbd_hub *hub = NULL; 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; #if 0 /* notyet */ struct usbd_tt *tts = NULL; #endif DPRINTFN(1,("uhub_attach\n")); sc->sc_dev = self; sc->sc_hub = dev; sc->sc_proto = uaa->proto; devinfop = usbd_devinfo_alloc(dev, 1); aprint_naive("\n"); aprint_normal(": %s\n", devinfop); usbd_devinfo_free(devinfop); if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) { aprint_normal_dev(self, "%s transaction translator%s\n", UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple", UHUB_IS_SINGLE_TT(sc) ? "" : "s"); } err = usbd_set_config_index(dev, 0, 1); if (err) { DPRINTF(("%s: configuration failed, error=%s\n", device_xname(sc->sc_dev), usbd_errstr(err))); return; } if (dev->depth > USB_HUB_MAX_DEPTH) { aprint_error_dev(self, "hub depth (%d) exceeded, hub ignored\n", USB_HUB_MAX_DEPTH); return; } /* Get hub descriptor. */ req.bmRequestType = UT_READ_CLASS_DEVICE; req.bRequest = UR_GET_DESCRIPTOR; USETW2(req.wValue, UDESC_HUB, 0); USETW(req.wIndex, 0); USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE); DPRINTFN(1,("%s: getting hub descriptor\n", __func__)); 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", device_xname(sc->sc_dev), usbd_errstr(err))); return; } for (nremov = 0, port = 1; port <= nports; port++) if (!UHD_NOT_REMOV(&hubdesc, port)) nremov++; aprint_verbose_dev(self, "%d port%s with %d removable, %s powered\n", nports, nports != 1 ? "s" : "", nremov, dev->self_powered ? "self" : "bus"); if (nports == 0) { aprint_debug_dev(self, "no ports, hub ignored\n"); goto bad; } hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port), M_USBDEV, M_NOWAIT); if (hub == NULL) return; dev->hub = hub; dev->hub->hubsoftc = sc; hub->explore = uhub_explore; hub->hubdesc = hubdesc; /* Set up interrupt pipe. */ err = usbd_device2interface_handle(dev, 0, &iface); if (err) { aprint_error_dev(self, "no interface handle\n"); goto bad; } if (UHUB_IS_HIGH_SPEED(sc) && !UHUB_IS_SINGLE_TT(sc)) { err = usbd_set_interface(iface, 1); if (err) aprint_error_dev(self, "can't enable multiple TTs\n"); } ed = usbd_interface2endpoint_descriptor(iface, 0); if (ed == NULL) { aprint_error_dev(self, "no endpoint descriptor\n"); goto bad; } if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { aprint_error_dev(self, "bad interrupt endpoint\n"); goto bad; } sc->sc_statuslen = (nports + 1 + 7) / 8; sc->sc_statusbuf = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT); if (!sc->sc_statusbuf) goto bad; sc->sc_status = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT); if (!sc->sc_status) goto bad; if (device_is_a(device_parent(device_parent(sc->sc_dev)), "ehci")) sc->sc_isehciroothub = 1; /* force initial scan */ memset(sc->sc_status, 0xff, sc->sc_statuslen); sc->sc_explorepending = 1; err = usbd_open_pipe_intr(iface, ed->bEndpointAddress, USBD_SHORT_XFER_OK|USBD_MPSAFE, &sc->sc_ipipe, sc, sc->sc_statusbuf, sc->sc_statuslen, uhub_intr, USBD_DEFAULT_INTERVAL); if (err) { aprint_error_dev(self, "cannot open interrupt pipe\n"); 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, sc->sc_dev); /* * To have the best chance of success we do things in the exact same * order as Windows 98. 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 */ #if 0 if (UHUB_IS_HIGH_SPEED(sc) && nports > 0) { tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) * sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT); if (!tts) goto bad; } #endif /* Set up data structures */ for (p = 0; p < nports; p++) { struct usbd_port *up = &hub->ports[p]; up->device = NULL; 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; up->restartcnt = 0; up->reattach = 0; #if 0 if (UHUB_IS_HIGH_SPEED(sc)) { up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p]; up->tt->hub = hub; } else { up->tt = NULL; } #endif } /* 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) aprint_error_dev(self, "port %d power on failed, %s\n", port, usbd_errstr(err)); DPRINTF(("usb_init_port: turn on port %d power\n", port)); } /* Wait for stable power if we are not a root hub */ if (dev->powersrc->parent != NULL) usbd_delay_ms(dev, pwrdly); /* The usual exploration will finish the setup. */ sc->sc_running = 1; if (!pmf_device_register(self, NULL, NULL)) aprint_error_dev(self, "couldn't establish power handler\n"); return; bad: if (sc->sc_status) free(sc->sc_status, M_USBDEV); if (sc->sc_statusbuf) free(sc->sc_statusbuf, M_USBDEV); if (hub) free(hub, M_USBDEV); dev->hub = NULL; return; } usbd_status uhub_explore(usbd_device_handle dev) { usb_hub_descriptor_t *hd = &dev->hub->hubdesc; struct uhub_softc *sc = dev->hub->hubsoftc; struct usbd_port *up; usbd_status err; int speed; int port; int change, status, reconnect; DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address)); if (!sc->sc_running) return (USBD_NOT_STARTED); /* Ignore hubs that are too deep. */ if (dev->depth > USB_HUB_MAX_DEPTH) return (USBD_TOO_DEEP); if (PORTSTAT_ISSET(sc, 0)) { /* hub status change */ usb_hub_status_t hs; err = usbd_get_hub_status(dev, &hs); if (err) { DPRINTF(("%s: get hub status failed, err=%d\n", device_xname(sc->sc_dev), err)); } else { /* just acknowledge */ status = UGETW(hs.wHubStatus); change = UGETW(hs.wHubChange); if (change & UHS_LOCAL_POWER) usbd_clear_hub_feature(dev, UHF_C_HUB_LOCAL_POWER); if (change & UHS_OVER_CURRENT) usbd_clear_hub_feature(dev, UHF_C_HUB_OVER_CURRENT); } } for (port = 1; port <= hd->bNbrPorts; port++) { up = &dev->hub->ports[port-1]; /* reattach is needed after firmware upload */ reconnect = up->reattach; up->reattach = 0; status = change = 0; /* don't check if no change summary notification */ if (PORTSTAT_ISSET(sc, port) || reconnect) { err = usbd_get_port_status(dev, port, &up->status); if (err) { DPRINTF(("uhub_explore: get port stat failed, " "error=%s\n", usbd_errstr(err))); continue; } status = UGETW(up->status.wPortStatus); change = UGETW(up->status.wPortChange); #if 0 printf("%s port %d: s/c=%x/%x\n", device_xname(sc->sc_dev), port, status, change); #endif } if (!change && !reconnect) { /* No status change, just do recursive explore. */ if (up->device != NULL && up->device->hub != NULL) up->device->hub->explore(up->device); continue; } if (change & UPS_C_PORT_ENABLED) { DPRINTF(("uhub_explore: C_PORT_ENABLED\n")); usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); if (change & UPS_C_CONNECT_STATUS) { /* Ignore the port error if the device vanished. */ } else if (status & UPS_PORT_ENABLED) { aprint_error_dev(sc->sc_dev, "illegal enable change, port %d\n", port); } else { /* Port error condition. */ if (up->restartcnt) /* no message first time */ aprint_error_dev(sc->sc_dev, "port error, restarting port %d\n", port); if (up->restartcnt++ < USBD_RESTART_MAX) goto disco; else aprint_error_dev(sc->sc_dev, "port error, giving up port %d\n", port); } } /* XXX handle overcurrent and resume events! */ if (!reconnect && !(change & UPS_C_CONNECT_STATUS)) { /* No status change, just do recursive explore. */ if (up->device != NULL && up->device->hub != NULL) up->device->hub->explore(up->device); continue; } /* We have a connect status change, handle it. */ DPRINTF(("uhub_explore: status change hub=%d port=%d\n", dev->address, port)); usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); /* * If there is already a device on the port the change status * must mean that is has disconnected. Looking at the * current connect status is not enough to figure this out * since a new unit may have been connected before we handle * the disconnect. */ disco: if (up->device != NULL) { /* Disconnected */ DPRINTF(("uhub_explore: device addr=%d disappeared " "on port %d\n", up->device->address, port)); usb_disconnect_port(up, sc->sc_dev, DETACH_FORCE); 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; } if (!(status & UPS_PORT_ENABLED)) { /* Not allowed send/receive packet. */ #ifdef DIAGNOSTIC printf("%s: port %d, device not enabled\n", device_xname(sc->sc_dev), 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(sc->sc_dev, dev->bus, dev->depth + 1, speed, port, up); /* XXX retry a few times? */ if (err) { DPRINTFN(-1,("uhub_explore: usbd_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); } /* * Called from process context when the hub is gone. * Detach all devices on active ports. */ int uhub_detach(device_t self, int flags) { struct uhub_softc *sc = device_private(self); struct usbd_hub *hub = sc->sc_hub->hub; struct usbd_port *rup; int nports, port, rc; DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); if (hub == NULL) /* Must be partially working */ return (0); /* XXXSMP usb */ KERNEL_LOCK(1, curlwp); nports = hub->hubdesc.bNbrPorts; for(port = 0; port < nports; port++) { rup = &hub->ports[port]; if (rup->device == NULL) continue; if ((rc = usb_disconnect_port(rup, self, flags)) != 0) { /* XXXSMP usb */ KERNEL_UNLOCK_ONE(curlwp); return rc; } } pmf_device_deregister(self); usbd_abort_pipe(sc->sc_ipipe); usbd_close_pipe(sc->sc_ipipe); usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub, 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); /* XXXSMP usb */ KERNEL_UNLOCK_ONE(curlwp); return (0); } int uhub_rescan(device_t self, const char *ifattr, const int *locators) { struct uhub_softc *sc = device_private(self); struct usbd_hub *hub = sc->sc_hub->hub; usbd_device_handle dev; int port; for (port = 0; port < hub->hubdesc.bNbrPorts; port++) { dev = hub->ports[port].device; if (dev == NULL) continue; usbd_reattach_device(sc->sc_dev, dev, port, locators); } 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 || dev->subdevlen == 0) continue; for (i = 0; i < dev->subdevlen; i++) { if (dev->subdevs[i] == child) { dev->subdevs[i] = NULL; dev->nifaces_claimed--; } } if (dev->nifaces_claimed == 0) { free(dev->subdevs, M_USB); dev->subdevs = NULL; dev->subdevlen = 0; } } } /* * 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); }