sys/dev/usbmisc/uvisor/uvisor.c

   1 /*
   2  * $NetBSD: uvisor.c,v 1.9 2001/01/23 14:04:14 augustss Exp $
   3  * $FreeBSD: src/sys/dev/usb/uvisor.c,v 1.16 2003/11/08 11:23:07 joe Exp $
   4  */
   5
   6 /*
   7  * Also already merged from NetBSD:
   8  *    $NetBSD: uvisor.c,v 1.12 2001/11/13 06:24:57 lukem Exp $
   9  *    $NetBSD: uvisor.c,v 1.13 2002/02/11 15:11:49 augustss Exp $
  10  *    $NetBSD: uvisor.c,v 1.14 2002/02/27 23:00:03 augustss Exp $
  11  *    $NetBSD: uvisor.c,v 1.15 2002/06/16 15:01:31 augustss Exp $
  12  *    $NetBSD: uvisor.c,v 1.16 2002/07/11 21:14:36 augustss Exp $
  13  *    $NetBSD: uvisor.c,v 1.17 2002/08/13 11:38:15 augustss Exp $
  14  *    $NetBSD: uvisor.c,v 1.18 2003/02/05 00:50:14 augustss Exp $
  15  *    $NetBSD: uvisor.c,v 1.19 2003/02/07 18:12:37 augustss Exp $
  16  *    $NetBSD: uvisor.c,v 1.20 2003/04/11 01:30:10 simonb Exp $
  17  */
  18
  19 /*
  20  * Copyright (c) 2000 The NetBSD Foundation, Inc.
  21  * All rights reserved.
  22  *
  23  * This code is derived from software contributed to The NetBSD Foundation
  24  * by Lennart Augustsson (lennart@augustsson.net) at
  25  * Carlstedt Research & Technology.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *        This product includes software developed by the NetBSD
  38  *        Foundation, Inc. and its contributors.
  39  * 4. Neither the name of The NetBSD Foundation nor the names of its
  40  *    contributors may be used to endorse or promote products derived
  41  *    from this software without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  44  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  45  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  46  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  47  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  48  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  49  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  50  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  51  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  52  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  53  * POSSIBILITY OF SUCH DAMAGE.
  54  */
  55
  56 /*
  57  * Handspring Visor (Palmpilot compatible PDA) driver
  58  */
  59
  60 #include <sys/param.h>
  61 #include <sys/systm.h>
  62 #include <sys/kernel.h>
  63 #include <sys/bus.h>
  64 #include <sys/conf.h>
  65 #include <sys/tty.h>
  66 #include <sys/sysctl.h>
  67
  68 #include <bus/usb/usb.h>
  69 #include <bus/usb/usbhid.h>
  70
  71 #include <bus/usb/usbdi.h>
  72 #include <bus/usb/usbdi_util.h>
  73
  74 #include "../ucom/ucomvar.h"
  75
  76 #ifdef USB_DEBUG
  77 #define DPRINTF(x)      if (uvisordebug) kprintf x
  78 #define DPRINTFN(n,x)   if (uvisordebug>(n)) kprintf x
  79 int uvisordebug = 0;
  80 SYSCTL_NODE(_hw_usb, OID_AUTO, uvisor, CTLFLAG_RW, 0, "USB uvisor");
  81 SYSCTL_INT(_hw_usb_uvisor, OID_AUTO, debug, CTLFLAG_RW,
  82            &uvisordebug, 0, "uvisor debug level");
  83 #else
  84 #define DPRINTF(x)
  85 #define DPRINTFN(n,x)
  86 #endif
  87
  88 #define UVISOR_CONFIG_INDEX     0
  89 #define UVISOR_IFACE_INDEX      0
  90 #define UVISOR_MODVER           1
  91
  92 /* From the Linux driver */
  93 /*
  94  * UVISOR_REQUEST_BYTES_AVAILABLE asks the visor for the number of bytes that
  95  * are available to be transfered to the host for the specified endpoint.
  96  * Currently this is not used, and always returns 0x0001
  97  */
  98 #define UVISOR_REQUEST_BYTES_AVAILABLE          0x01
  99
 100 /*
 101  * UVISOR_CLOSE_NOTIFICATION is set to the device to notify it that the host
 102  * is now closing the pipe. An empty packet is sent in response.
 103  */
 104 #define UVISOR_CLOSE_NOTIFICATION               0x02
 105
 106 /*
 107  * UVISOR_GET_CONNECTION_INFORMATION is sent by the host during enumeration to
 108  * get the endpoints used by the connection.
 109  */
 110 #define UVISOR_GET_CONNECTION_INFORMATION       0x03
 111
 112
 113 /*
 114  * UVISOR_GET_CONNECTION_INFORMATION returns data in the following format
 115  */
 116 #define UVISOR_MAX_CONN 8
 117 struct uvisor_connection_info {
 118         uWord   num_ports;
 119         struct {
 120                 uByte   port_function_id;
 121                 uByte   port;
 122         } connections[UVISOR_MAX_CONN];
 123 };
 124 #define UVISOR_CONNECTION_INFO_SIZE 18
 125
 126 /* struct uvisor_connection_info.connection[x].port defines: */
 127 #define UVISOR_ENDPOINT_1               0x01
 128 #define UVISOR_ENDPOINT_2               0x02
 129
 130 /* struct uvisor_connection_info.connection[x].port_function_id defines: */
 131 #define UVISOR_FUNCTION_GENERIC         0x00
 132 #define UVISOR_FUNCTION_DEBUGGER        0x01
 133 #define UVISOR_FUNCTION_HOTSYNC         0x02
 134 #define UVISOR_FUNCTION_CONSOLE         0x03
 135 #define UVISOR_FUNCTION_REMOTE_FILE_SYS 0x04
 136
 137 /*
 138  * Unknown PalmOS stuff.
 139  */
 140 #define UVISOR_GET_PALM_INFORMATION             0x04
 141 #define UVISOR_GET_PALM_INFORMATION_LEN         0x14
 142
 143
 144 /*
 145  * Crank down UVISORBUFSIZE from 1024 to 64 to avoid a problem where
 146  * the Palm device and the USB host controller deadlock. The USB host
 147  * controller is expecting an early-end-of-transmission packet with 0
 148  * data, and the Palm doesn't send one because it's already
 149  * communicated the amount of data it's going to send in a header
 150  * (which ucom/uvisor are oblivious to). This is the problem that has
 151  * been known on the pilot-link lists as the "[Free]BSD USB problem",
 152  * but not understood.
 153  */
 154 #define UVISORIBUFSIZE 64
 155 #define UVISOROBUFSIZE 1024
 156
 157 struct uvisor_softc {
 158         struct ucom_softc       sc_ucom;
 159         u_int16_t               sc_flags;
 160 };
 161
 162 static usbd_status uvisor_init(struct uvisor_softc *);
 163
 164 static void uvisor_close(void *, int);
 165
 166 struct ucom_callback uvisor_callback = {
 167         NULL,
 168         NULL,
 169         NULL,
 170         NULL,
 171         NULL,
 172         uvisor_close,
 173         NULL,
 174         NULL,
 175 };
 176
 177 static device_probe_t uvisor_match;
 178 static device_attach_t uvisor_attach;
 179 static device_detach_t uvisor_detach;
 180 static device_method_t uvisor_methods[] = {
 181        /* Device interface */
 182        DEVMETHOD(device_probe, uvisor_match),
 183        DEVMETHOD(device_attach, uvisor_attach),
 184        DEVMETHOD(device_detach, uvisor_detach),
 185        DEVMETHOD_END
 186  };
 187
 188
 189 static driver_t uvisor_driver = {
 190        "ucom",
 191        uvisor_methods,
 192        sizeof (struct uvisor_softc)
 193 };
 194
 195 DRIVER_MODULE(uvisor, uhub, uvisor_driver, ucom_devclass, usbd_driver_load, NULL);
 196 MODULE_DEPEND(uvisor, usb, 1, 1, 1);
 197 MODULE_DEPEND(uvisor, ucom, UCOM_MINVER, UCOM_PREFVER, UCOM_MAXVER);
 198 MODULE_VERSION(uvisor, UVISOR_MODVER);
 199
 200 struct uvisor_type {
 201         struct usb_devno        uv_dev;
 202         u_int16_t               uv_flags;
 203 #define PALM4   0x0001
 204 #define VISOR   0x0002
 205 #define PALM35  0x0004
 206 };
 207 static const struct uvisor_type uvisor_devs[] = {
 208         {{ USB_DEVICE(0x054c, 0x0066) }, 0 },     /* Sony Clie v4.0 */
 209         {{ USB_DEVICE(0x054c, 0x0095) }, PALM4 }, /* Sony Clie s360 */
 210         {{ USB_DEVICE(0x054c, 0x009a) }, 0 },     /* Sony Clie v4.1 */
 211         {{ USB_DEVICE(0x054c, 0x00da) }, PALM4 }, /* Sony Clie nx60 */
 212         {{ USB_DEVICE(0x082d, 0x0100) }, 0 },     /* Handspring Visor */
 213         {{ USB_DEVICE(0x082d, 0x0200) }, PALM4 }, /* Handspring Treo */
 214         {{ USB_DEVICE(0x0830, 0x0001) }, PALM4 }, /* Palm m500 */
 215         {{ USB_DEVICE(0x0830, 0x0002) }, PALM4 }, /* Palm m505 */
 216         {{ USB_DEVICE(0x0830, 0x0003) }, PALM4 }, /* Palm m515 */
 217         {{ USB_DEVICE(0x0830, 0x0020) }, PALM4 }, /* Palm i705 */
 218         {{ USB_DEVICE(0x0830, 0x0031) }, PALM4 }, /* Palm Tungsten Z */
 219         {{ USB_DEVICE(0x0830, 0x0040) }, PALM4 }, /* Palm m125 */
 220         {{ USB_DEVICE(0x0830, 0x0050) }, PALM4 }, /* Palm m130 */
 221         {{ USB_DEVICE(0x0830, 0x0060) }, PALM4 }, /* Palm Tungsten T */
 222         {{ USB_DEVICE(0x0830, 0x0070) }, PALM4 }, /* Palm Palm Zire */
 223         {{ USB_DEVICE(0x4766, 0x0001) }, PALM4 }, /* Aceeca MEZ1000 RDA */
 224         {{ USB_DEVICE(0x091e, 0x0004) }, PALM4 }, /* Garmin iQue 3600 */
 225         {{ USB_DEVICE(0x0e67, 0x0002) }, PALM4 }, /* Fossil, Wrist PDA */
 226         {{ USB_DEVICE(0x082d, 0x0300) }, PALM4 }, /* Handspring Treo 600 */
 227         {{ USB_DEVICE(0x0830, 0x0060) }, PALM4 }, /* Palm Tungsten T */
 228         {{ USB_DEVICE(0x0830, 0x0061) }, PALM4 }, /* Palm Zire 31 */
 229         {{ USB_DEVICE(0x04e8, 0x6601) }, PALM4 }, /* Samsung I500 Palm USB */
 230         {{ USB_DEVICE(0x054c, 0x0038) }, PALM35 }, /* Sony Clie v3.5 */
 231         {{ USB_DEVICE(0x054c, 0x0169) }, PALM4 }, /* Sony Clie tj37 */
 232         {{ USB_DEVICE(0x12ef, 0x0100) }, PALM4 }, /* Tapwave Zodiac */
 233 };
 234 #define uvisor_lookup(v, p) ((const struct uvisor_type *)usb_lookup(uvisor_devs, v, p))
 235
 236 static int
 237 uvisor_match(device_t self)
 238 {
 239         struct usb_attach_arg *uaa = device_get_ivars(self);
 240
 241         if (uaa->iface != NULL)
 242                 return (UMATCH_NONE);
 243
 244         DPRINTFN(20,("uvisor: vendor=0x%x, product=0x%x\n",
 245                      uaa->vendor, uaa->product));
 246
 247         return (uvisor_lookup(uaa->vendor, uaa->product) != NULL ?
 248                 UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
 249 }
 250
 251 static int
 252 uvisor_attach(device_t self)
 253 {
 254         struct uvisor_softc *sc = device_get_softc(self);
 255         struct usb_attach_arg *uaa = device_get_ivars(self);
 256         usbd_device_handle dev = uaa->device;
 257         usbd_interface_handle iface;
 258         usb_interface_descriptor_t *id;
 259         usb_endpoint_descriptor_t *ed;
 260         const char *devname;
 261         int i;
 262         usbd_status err;
 263         struct ucom_softc *ucom;
 264
 265         ucom = &sc->sc_ucom;
 266
 267         bzero(sc, sizeof (struct uvisor_softc));
 268
 269         ucom->sc_dev = self;
 270         ucom->sc_udev = dev;
 271         ucom->sc_iface = uaa->iface;
 272
 273         devname = device_get_nameunit(ucom->sc_dev);
 274
 275         DPRINTFN(10,("\nuvisor_attach: sc=%p\n", sc));
 276
 277         /* Move the device into the configured state. */
 278         err = usbd_set_config_index(dev, UVISOR_CONFIG_INDEX, 1);
 279         if (err) {
 280                 kprintf("\n%s: failed to set configuration, err=%s\n",
 281                        devname, usbd_errstr(err));
 282                 goto bad;
 283         }
 284
 285         err = usbd_device2interface_handle(dev, UVISOR_IFACE_INDEX, &iface);
 286         if (err) {
 287                 kprintf("\n%s: failed to get interface, err=%s\n",
 288                        devname, usbd_errstr(err));
 289                 goto bad;
 290         }
 291
 292         sc->sc_flags = uvisor_lookup(uaa->vendor, uaa->product)->uv_flags;
 293
 294         id = usbd_get_interface_descriptor(iface);
 295
 296         ucom->sc_udev = dev;
 297         ucom->sc_iface = iface;
 298
 299         ucom->sc_bulkin_no = ucom->sc_bulkout_no = -1;
 300         for (i = 0; i < id->bNumEndpoints; i++) {
 301                 int addr, dir, attr;
 302                 ed = usbd_interface2endpoint_descriptor(iface, i);
 303                 if (ed == NULL) {
 304                         kprintf("%s: could not read endpoint descriptor"
 305                                ": %s\n", devname, usbd_errstr(err));
 306                         goto bad;
 307                 }
 308
 309                 addr = ed->bEndpointAddress;
 310                 dir = UE_GET_DIR(ed->bEndpointAddress);
 311                 attr = ed->bmAttributes & UE_XFERTYPE;
 312                 if (dir == UE_DIR_IN && attr == UE_BULK)
 313                         ucom->sc_bulkin_no = addr;
 314                 else if (dir == UE_DIR_OUT && attr == UE_BULK)
 315                         ucom->sc_bulkout_no = addr;
 316                 else {
 317                         kprintf("%s: unexpected endpoint\n", devname);
 318                         goto bad;
 319                 }
 320         }
 321         if (ucom->sc_bulkin_no == -1) {
 322                 kprintf("%s: Could not find data bulk in\n",
 323                        device_get_nameunit(ucom->sc_dev));
 324                 goto bad;
 325         }
 326         if (ucom->sc_bulkout_no == -1) {
 327                 kprintf("%s: Could not find data bulk out\n",
 328                        device_get_nameunit(ucom->sc_dev));
 329                 goto bad;
 330         }
 331
 332         ucom->sc_parent = sc;
 333         ucom->sc_portno = UCOM_UNK_PORTNO;
 334         /* bulkin, bulkout set above */
 335         ucom->sc_ibufsize = UVISORIBUFSIZE;
 336         ucom->sc_obufsize = UVISOROBUFSIZE;
 337         ucom->sc_ibufsizepad = UVISORIBUFSIZE;
 338         ucom->sc_opkthdrlen = 0;
 339         ucom->sc_callback = &uvisor_callback;
 340
 341         err = uvisor_init(sc);
 342         if (err) {
 343                 kprintf("%s: init failed, %s\n", device_get_nameunit(ucom->sc_dev),
 344                        usbd_errstr(err));
 345                 goto bad;
 346         }
 347
 348         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, ucom->sc_udev,
 349                            ucom->sc_dev);
 350
 351         DPRINTF(("uvisor: in=0x%x out=0x%x\n", ucom->sc_bulkin_no, ucom->sc_bulkout_no));
 352         ucom_attach(&sc->sc_ucom);
 353
 354         return 0;
 355
 356 bad:
 357         DPRINTF(("uvisor_attach: ATTACH ERROR\n"));
 358         ucom->sc_dying = 1;
 359         return ENXIO;
 360 }
 361
 362 #if 0
 363
 364 int
 365 uvisor_activate(device_t self, enum devact act)
 366 {
 367         struct uvisor_softc *sc = (struct uvisor_softc *)self;
 368         int rv = 0;
 369
 370         switch (act) {
 371         case DVACT_ACTIVATE:
 372                 return (EOPNOTSUPP);
 373                 break;
 374
 375         case DVACT_DEACTIVATE:
 376                 if (sc->sc_subdev != NULL)
 377                         rv = config_deactivate(sc->sc_subdev);
 378                 sc->sc_dying = 1;
 379                 break;
 380         }
 381         return (rv);
 382 }
 383
 384 #endif
 385
 386 static int
 387 uvisor_detach(device_t self)
 388 {
 389         struct uvisor_softc *sc = device_get_softc(self);
 390         int rv = 0;
 391
 392         DPRINTF(("uvisor_detach: sc=%p\n", sc));
 393         sc->sc_ucom.sc_dying = 1;
 394         rv = ucom_detach(&sc->sc_ucom);
 395
 396         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_ucom.sc_udev,
 397                            sc->sc_ucom.sc_dev);
 398
 399         return (rv);
 400 }
 401
 402 usbd_status
 403 uvisor_init(struct uvisor_softc *sc)
 404 {
 405         usbd_status err;
 406         usb_device_request_t req;
 407         struct uvisor_connection_info coninfo;
 408         int actlen;
 409         uWord avail;
 410         char buffer[256];
 411
 412         DPRINTF(("uvisor_init: getting connection info\n"));
 413         req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
 414         req.bRequest = UVISOR_GET_CONNECTION_INFORMATION;
 415         USETW(req.wValue, 0);
 416         USETW(req.wIndex, 0);
 417         USETW(req.wLength, UVISOR_CONNECTION_INFO_SIZE);
 418         err = usbd_do_request_flags(sc->sc_ucom.sc_udev, &req, &coninfo,
 419                                     USBD_SHORT_XFER_OK, &actlen,
 420                                     USBD_DEFAULT_TIMEOUT);
 421         if (err)
 422                 return (err);
 423
 424 #ifdef USB_DEBUG
 425         {
 426                 int i, np;
 427                 char *string;
 428
 429                 np = UGETW(coninfo.num_ports);
 430                 kprintf("%s: Number of ports: %d\n", device_get_nameunit(sc->sc_ucom.sc_dev), np);
 431                 for (i = 0; i < np; ++i) {
 432                         switch (coninfo.connections[i].port_function_id) {
 433                         case UVISOR_FUNCTION_GENERIC:
 434                                 string = "Generic";
 435                                 break;
 436                         case UVISOR_FUNCTION_DEBUGGER:
 437                                 string = "Debugger";
 438                                 break;
 439                         case UVISOR_FUNCTION_HOTSYNC:
 440                                 string = "HotSync";
 441                                 break;
 442                         case UVISOR_FUNCTION_REMOTE_FILE_SYS:
 443                                 string = "Remote File System";
 444                                 break;
 445                         default:
 446                                 string = "unknown";
 447                                 break;
 448                         }
 449                         kprintf("%s: port %d, is for %s\n",
 450                             device_get_nameunit(sc->sc_ucom.sc_dev), coninfo.connections[i].port,
 451                             string);
 452                 }
 453         }
 454 #endif
 455
 456         if (sc->sc_flags & PALM4) {
 457                 /* Palm OS 4.0 Hack */
 458                 req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
 459                 req.bRequest = UVISOR_GET_PALM_INFORMATION;
 460                 USETW(req.wValue, 0);
 461                 USETW(req.wIndex, 0);
 462                 USETW(req.wLength, UVISOR_GET_PALM_INFORMATION_LEN);
 463                 err = usbd_do_request(sc->sc_ucom.sc_udev, &req, buffer);
 464                 if (err)
 465                         return (err);
 466                 req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
 467                 req.bRequest = UVISOR_GET_PALM_INFORMATION;
 468                 USETW(req.wValue, 0);
 469                 USETW(req.wIndex, 0);
 470                 USETW(req.wLength, UVISOR_GET_PALM_INFORMATION_LEN);
 471                 err = usbd_do_request(sc->sc_ucom.sc_udev, &req, buffer);
 472                 if (err)
 473                         return (err);
 474         }
 475
 476         if (sc->sc_flags & PALM35) {
 477                 /* get the config number */
 478                 req.bmRequestType = UT_READ;
 479                 req.bRequest = UR_GET_CONFIG;
 480                 USETW(req.wValue, 0);
 481                 USETW(req.wIndex, 0);
 482                 USETW(req.wLength, 1);
 483                 err = usbd_do_request(sc->sc_ucom.sc_udev, &req, buffer);
 484                 if (err)
 485                         return (err);
 486
 487                 /* get the interface number */
 488                 req.bmRequestType = UT_READ_DEVICE;
 489                 req.bRequest = UR_GET_INTERFACE;
 490                 USETW(req.wValue, 0);
 491                 USETW(req.wIndex, 0);
 492                 USETW(req.wLength, 1);
 493                 err = usbd_do_request(sc->sc_ucom.sc_udev, &req, buffer);
 494                 if (err)
 495                         return (err);
 496         }
 497
 498         DPRINTF(("uvisor_init: getting available bytes\n"));
 499         req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
 500         req.bRequest = UVISOR_REQUEST_BYTES_AVAILABLE;
 501         USETW(req.wValue, 0);
 502         USETW(req.wIndex, 5);
 503         USETW(req.wLength, sizeof avail);
 504         err = usbd_do_request(sc->sc_ucom.sc_udev, &req, &avail);
 505         if (err)
 506                 return (err);
 507         DPRINTF(("uvisor_init: avail=%d\n", UGETW(avail)));
 508
 509         DPRINTF(("uvisor_init: done\n"));
 510         return (err);
 511 }
 512
 513 void
 514 uvisor_close(void *addr, int portno)
 515 {
 516         struct uvisor_softc *sc = addr;
 517         usb_device_request_t req;
 518         struct uvisor_connection_info coninfo; /* XXX ? */
 519         int actlen;
 520
 521         if (sc->sc_ucom.sc_dying)
 522                 return;
 523
 524         req.bmRequestType = UT_READ_VENDOR_ENDPOINT; /* XXX read? */
 525         req.bRequest = UVISOR_CLOSE_NOTIFICATION;
 526         USETW(req.wValue, 0);
 527         USETW(req.wIndex, 0);
 528         USETW(req.wLength, UVISOR_CONNECTION_INFO_SIZE);
 529         (void)usbd_do_request_flags(sc->sc_ucom.sc_udev, &req, &coninfo,
 530                                     USBD_SHORT_XFER_OK, &actlen,
 531                                     USBD_DEFAULT_TIMEOUT);
 532 }