/* $OpenBSD: uhub.c,v 1.63 2013/10/19 08:29:30 mpi Exp $ */ /* $NetBSD: uhub.c,v 1.64 2003/02/08 03:32:51 ichiro Exp $ */ /* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */ /* * Copyright (c) 1998 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 #include #include #include #include #include #include #include #include #include #define UHUB_INTR_INTERVAL 255 /* ms */ #ifdef UHUB_DEBUG #define DPRINTF(x...) do { printf(x); } while (0) #else #define DPRINTF(x...) #endif struct uhub_softc { struct device sc_dev; /* base device */ struct usbd_device *sc_hub; /* USB device */ struct usbd_pipe *sc_ipipe; /* interrupt pipe */ u_int8_t *sc_statusbuf; /* per port status buffer */ size_t sc_statuslen; /* status bufferlen */ u_char sc_running; }; #define UHUB_PROTO(sc) ((sc)->sc_hub->ddesc.bDeviceProtocol) #define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB) #define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT) int uhub_explore(struct usbd_device *hub); void uhub_intr(struct usbd_xfer *, void *, usbd_status); /* * We need two attachment points: * hub to usb and hub to hub * Every other driver only connects to hubs */ int uhub_match(struct device *, void *, void *); void uhub_attach(struct device *, struct device *, void *); int uhub_detach(struct device *, int); int uhub_activate(struct device *, int); struct cfdriver uhub_cd = { NULL, "uhub", DV_DULL }; const struct cfattach uhub_ca = { sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, uhub_activate, }; struct cfattach uhub_uhub_ca = { sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, uhub_activate }; int uhub_match(struct device *parent, void *match, void *aux) { struct usb_attach_arg *uaa = aux; usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device); /* * The subclass for hubs seems to be 0 for some and 1 for others, * so we just ignore the subclass. */ if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB) return (UMATCH_DEVCLASS_DEVSUBCLASS); return (UMATCH_NONE); } void uhub_attach(struct device *parent, struct device *self, void *aux) { struct uhub_softc *sc = (struct uhub_softc *)self; struct usb_attach_arg *uaa = aux; struct usbd_device *dev = uaa->device; usbd_status err; struct usbd_hub *hub = NULL; usb_device_request_t req; usb_hub_descriptor_t hubdesc; int p, port, nports, nremov, pwrdly; struct usbd_interface *iface; usb_endpoint_descriptor_t *ed; struct usbd_tt *tts = NULL; sc->sc_hub = dev; err = usbd_set_config_index(dev, 0, 1); if (err) { DPRINTF("%s: configuration failed, error=%s\n", sc->sc_dev.dv_xname, usbd_errstr(err)); return; } if (dev->depth > USB_HUB_MAX_DEPTH) { printf("%s: hub depth (%d) exceeded, hub ignored\n", sc->sc_dev.dv_xname, 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); 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", sc->sc_dev.dv_xname, usbd_errstr(err)); return; } for (nremov = 0, port = 1; port <= nports; port++) if (!UHD_NOT_REMOV(&hubdesc, port)) nremov++; #ifdef UHUB_DEBUG printf("%s: %d port%s with %d removable, %s powered", sc->sc_dev.dv_xname, nports, nports != 1 ? "s" : "", nremov, dev->self_powered ? "self" : "bus"); if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) { printf(", %s transaction translator%s", UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple", UHUB_IS_SINGLE_TT(sc) ? "" : "s"); } printf("\n"); #endif if (nports == 0) { printf("%s: no ports, hub ignored\n", sc->sc_dev.dv_xname); goto bad; } hub = malloc(sizeof(*hub), M_USBDEV, M_NOWAIT); if (hub == NULL) return; hub->ports = malloc(sizeof(struct usbd_port) * nports, M_USBDEV, M_NOWAIT); if (hub->ports == NULL) { free(hub, M_USBDEV); return; } dev->hub = hub; dev->hub->hubsoftc = sc; hub->explore = uhub_explore; hub->hubdesc = hubdesc; 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", sc->sc_dev.dv_xname); goto bad; } /* Set up interrupt pipe. */ err = usbd_device2interface_handle(dev, 0, &iface); if (err) { printf("%s: no interface handle\n", sc->sc_dev.dv_xname); goto bad; } ed = usbd_interface2endpoint_descriptor(iface, 0); if (ed == NULL) { printf("%s: no endpoint descriptor\n", sc->sc_dev.dv_xname); goto bad; } if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { printf("%s: bad interrupt endpoint\n", sc->sc_dev.dv_xname); 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; err = usbd_open_pipe_intr(iface, ed->bEndpointAddress, USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_statusbuf, sc->sc_statuslen, uhub_intr, UHUB_INTR_INTERVAL); if (err) { printf("%s: cannot open interrupt pipe\n", sc->sc_dev.dv_xname); goto bad; } /* Wait with power off for a while. */ usbd_delay_ms(dev, USB_POWER_DOWN_TIME); /* * 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 */ if (UHUB_IS_HIGH_SPEED(sc)) { tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) * sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT); if (!tts) goto bad; } /* 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 (UHUB_IS_HIGH_SPEED(sc)) { up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p]; up->tt->hub = hub; } else { up->tt = NULL; } } /* 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", sc->sc_dev.dv_xname, port, usbd_errstr(err)); } /* Wait for stable power. Root hubs delay in their event thread. */ if (dev->powersrc->parent != NULL) usbd_delay_ms(dev, pwrdly); /* The usual exploration will finish the setup. */ sc->sc_running = 1; return; bad: if (sc->sc_statusbuf) free(sc->sc_statusbuf, M_USBDEV); if (hub) { if (hub->ports) free(hub->ports, M_USBDEV); free(hub, M_USBDEV); } dev->hub = NULL; } int uhub_explore(struct usbd_device *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; if (usbd_is_dying(dev)) return (EIO); if (!sc->sc_running) return (ENXIO); /* Ignore hubs that are too deep. */ if (dev->depth > USB_HUB_MAX_DEPTH) return (EOPNOTSUPP); for (port = 1; port <= hd->bNbrPorts; port++) { up = &dev->hub->ports[port-1]; err = usbd_get_port_status(dev, port, &up->status); if (err) { DPRINTF("%s: get port %d status failed, error=%s\n", sc->sc_dev.dv_xname, port, usbd_errstr(err)); continue; } status = UGETW(up->status.wPortStatus); change = UGETW(up->status.wPortChange); reconnect = up->reattach; up->reattach = 0; DPRINTF("%s: port %d status=0x%04x change=0x%04x\n", sc->sc_dev.dv_xname, port, status, change); if (change & UPS_C_PORT_ENABLED) { 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) { printf("%s: illegal enable change, port %d\n", sc->sc_dev.dv_xname, port); } else { /* Port error condition. */ if (up->restartcnt) /* no message first time */ printf("%s: port error, restarting " "port %d\n", sc->sc_dev.dv_xname, port); if (up->restartcnt++ < USBD_RESTART_MAX) goto disco; else printf("%s: port error, giving up " "port %d\n", sc->sc_dev.dv_xname, port); } } 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. */ usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/ /* * 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 */ usb_disconnect_port(up, &sc->sc_dev); usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); } if (!(status & UPS_CURRENT_CONNECT_STATUS)) { /* Nothing connected, just ignore it. */ continue; } /* Connected */ if (!(status & UPS_PORT_POWER)) printf("%s: strange, connected port %d has no power\n", sc->sc_dev.dv_xname, 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)) { printf("%s: port %d reset failed\n", sc->sc_dev.dv_xname, port); continue; } /* Get port status again, it might have changed during reset */ err = usbd_get_port_status(dev, port, &up->status); if (err) { DPRINTF("%s: get port %d status failed, error=%s\n", sc->sc_dev.dv_xname, port, 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. */ DPRINTF("%s: port %d, device disappeared after reset\n", sc->sc_dev.dv_xname, port); 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) { DPRINTF("%s: usbd_new_device failed, error=%s\n", sc->sc_dev.dv_xname, 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. */ printf("%s: device problem, disabling port %d\n", sc->sc_dev.dv_xname, 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); } } return (0); } int uhub_activate(struct device *self, int act) { struct uhub_softc *sc = (struct uhub_softc *)self; struct usbd_hub *hub = sc->sc_hub->hub; struct usbd_device *dev; int nports, port, i; switch (act) { 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 != NULL && dev->subdevs != NULL) { for (i = 0; dev->subdevs[i] != NULL; i++) config_deactivate(dev->subdevs[i]); } } break; } return (0); } /* * Called from process context when the hub is gone. * Detach all devices on active ports. */ int uhub_detach(struct device *self, int flags) { struct uhub_softc *sc = (struct uhub_softc *)self; struct usbd_hub *hub = sc->sc_hub->hub; struct usbd_port *rup; int port, nports; if (hub == NULL) /* Must be partially working */ return (0); 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); } if (hub->ports[0].tt) free(hub->ports[0].tt, M_USBDEV); if (sc->sc_statusbuf) free(sc->sc_statusbuf, M_USBDEV); if (hub->ports) free(hub->ports, M_USBDEV); free(hub, M_USBDEV); sc->sc_hub->hub = NULL; return (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(struct usbd_xfer *xfer, void *addr, usbd_status status) { struct uhub_softc *sc = addr; DPRINTF("%s: intr status=%d\n", sc->sc_dev.dv_xname, status); if (status == USBD_STALLED) usbd_clear_endpoint_stall_async(sc->sc_ipipe); else if (status == USBD_NORMAL_COMPLETION) usb_needs_explore(sc->sc_hub, 0); }