/* $OpenBSD: uhub.c,v 1.26 2004/07/11 05:32:38 deraadt 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 #if defined(__NetBSD__) || defined(__OpenBSD__) #include #include #elif defined(__FreeBSD__) #include #include #include "bus_if.h" #endif #include #include #include #include #include #define UHUB_INTR_INTERVAL 255 /* ms */ #ifdef UHUB_DEBUG #define DPRINTF(x) do { if (uhubdebug) logprintf x; } while (0) #define DPRINTFN(n,x) do { if (uhubdebug>(n)) logprintf x; } while (0) int uhubdebug = 0; #else #define DPRINTF(x) #define DPRINTFN(n,x) #endif struct uhub_softc { USBBASEDEVICE sc_dev; /* base device */ usbd_device_handle sc_hub; /* USB device */ usbd_pipe_handle sc_ipipe; /* interrupt pipe */ u_int8_t sc_status[1]; /* XXX more ports */ u_char sc_running; }; Static usbd_status uhub_explore(usbd_device_handle hub); Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status); #if defined(__FreeBSD__) Static bus_child_detached_t uhub_child_detached; #endif /* * We need two attachment points: * hub to usb and hub to hub * Every other driver only connects to hubs */ #if defined(__NetBSD__) || defined(__OpenBSD__) USB_DECLARE_DRIVER(uhub); #if defined(__NetBSD__) /* Create the driver instance for the hub connected to hub case */ CFATTACH_DECL(uhub_uhub, sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, uhub_activate); #else struct cfattach uhub_uhub_ca = { sizeof(struct uhub_softc), uhub_match, uhub_attach, uhub_detach, uhub_activate }; #endif #elif defined(__FreeBSD__) USB_DECLARE_DRIVER_INIT(uhub, DEVMETHOD(bus_child_detached, uhub_child_detached)); /* Create the driver instance for the hub connected to usb case. */ devclass_t uhubroot_devclass; Static device_method_t uhubroot_methods[] = { DEVMETHOD(device_probe, uhub_match), DEVMETHOD(device_attach, uhub_attach), /* detach is not allowed for a root hub */ {0,0} }; Static driver_t uhubroot_driver = { "uhub", uhubroot_methods, sizeof(struct uhub_softc) }; #endif USB_MATCH(uhub) { USB_MATCH_START(uhub, uaa); usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device); DPRINTFN(5,("uhub_match, dd=%p\n", dd)); /* * 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); } 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; USETW2(req.wValue, UDESC_HUB, 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; up->restartcnt = 0; } /* 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; } 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; 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); 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(("uhub_explore: get port status failed, " "error=%s\n", usbd_errstr(err))); continue; } status = UGETW(up->status.wPortStatus); change = UGETW(up->status.wPortChange); DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n", USBDEVNAME(sc->sc_dev), port, status, change)); 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) { printf("%s: illegal enable change, port %d\n", USBDEVNAME(sc->sc_dev), port); } else { /* Port error condition. */ if (up->restartcnt) /* no message first time */ printf("%s: port error, restarting " "port %d\n", USBDEVNAME(sc->sc_dev), port); if (up->restartcnt++ < USBD_RESTART_MAX) goto disco; else printf("%s: port error, giving up " "port %d\n", USBDEVNAME(sc->sc_dev), port); } } if (!(change & UPS_C_CONNECT_STATUS)) { DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_" "STATUS\n", port)); /* No status change, just do recursive explore. */ if (up->device != NULL && up->device->hub != NULL) up->device->hub->explore(up->device); #if 0 && defined(DIAGNOSTIC) if (up->device == NULL && (status & UPS_CURRENT_CONNECT_STATUS)) printf("%s: connected, no device\n", USBDEVNAME(sc->sc_dev)); #endif 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); /*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 */ DPRINTF(("uhub_explore: device addr=%d disappeared " "on port %d\n", up->device->address, port)); 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)) printf("%s: strange, connected port %d has no power\n", USBDEVNAME(sc->sc_dev), 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", USBDEVNAME(sc->sc_dev), 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 UHUB_DEBUG printf("%s: port %d, device disappeared after reset\n", USBDEVNAME(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(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. */ printf("%s: device problem, disabling port %d\n", USBDEVNAME(sc->sc_dev), 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 (USBD_NORMAL_COMPLETION); } #if defined(__NetBSD__) || defined(__OpenBSD__) int uhub_activate(device_ptr_t self, enum devact act) { struct uhub_softc *sc = (struct uhub_softc *)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 != NULL && dev->subdevs != NULL) { for (i = 0; dev->subdevs[i] != NULL; i++) config_deactivate(dev->subdevs[i]); } } break; } return (0); } #endif /* * 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; #if defined(__NetBSD__) || defined(__OpenBSD__) DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); #elif defined(__FreeBSD__) DPRINTF(("uhub_detach: sc=%port\n", sc)); #endif 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); } usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub, USBDEV(sc->sc_dev)); free(hub, M_USBDEV); sc->sc_hub->hub = NULL; return (0); } #if defined(__FreeBSD__) /* Called when a device has been detached from it */ Static void uhub_child_detached(device_t self, device_t child) { struct uhub_softc *sc = device_get_softc(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->subdevs) { for (i = 0; dev->subdevs[i]; i++) { if (dev->subdevs[i] == child) { dev->subdevs[i] = NULL; return; } } } } } #endif /* * 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) usb_needs_explore(sc->sc_hub); } #if defined(__FreeBSD__) DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0); DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0); #endif