sys/dev/usb/usb_msctest.c

   1 /* $FreeBSD$ */
   2 /*-
   3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 /*
  28  * The following file contains code that will detect USB autoinstall
  29  * disks.
  30  *
  31  * TODO: Potentially we could add code to automatically detect USB
  32  * mass storage quirks for not supported SCSI commands!
  33  */
  34
  35 #include <sys/stdint.h>
  36 #include <sys/stddef.h>
  37 #include <sys/param.h>
  38 #include <sys/queue.h>
  39 #include <sys/types.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/bus.h>
  43 #include <sys/linker_set.h>
  44 #include <sys/module.h>
  45 #include <sys/lock.h>
  46 #include <sys/mutex.h>
  47 #include <sys/condvar.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/sx.h>
  50 #include <sys/unistd.h>
  51 #include <sys/callout.h>
  52 #include <sys/malloc.h>
  53 #include <sys/priv.h>
  54
  55 #include <dev/usb/usb.h>
  56 #include <dev/usb/usbdi.h>
  57 #include <dev/usb/usbdi_util.h>
  58
  59 #define USB_DEBUG_VAR usb_debug
  60
  61 #include <dev/usb/usb_busdma.h>
  62 #include <dev/usb/usb_process.h>
  63 #include <dev/usb/usb_transfer.h>
  64 #include <dev/usb/usb_msctest.h>
  65 #include <dev/usb/usb_debug.h>
  66 #include <dev/usb/usb_busdma.h>
  67 #include <dev/usb/usb_device.h>
  68 #include <dev/usb/usb_request.h>
  69 #include <dev/usb/usb_util.h>
  70 #include <dev/usb/quirk/usb_quirk.h>
  71
  72 enum {
  73         ST_COMMAND,
  74         ST_DATA_RD,
  75         ST_DATA_RD_CS,
  76         ST_DATA_WR,
  77         ST_DATA_WR_CS,
  78         ST_STATUS,
  79         ST_MAX,
  80 };
  81
  82 enum {
  83         DIR_IN,
  84         DIR_OUT,
  85         DIR_NONE,
  86 };
  87
  88 #define SCSI_INQ_LEN    0x24
  89 static uint8_t scsi_test_unit_ready[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
  90 static uint8_t scsi_inquiry[] = { 0x12, 0x00, 0x00, 0x00, SCSI_INQ_LEN, 0x00 };
  91 static uint8_t scsi_rezero_init[] =     { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
  92 static uint8_t scsi_start_stop_unit[] = { 0x1b, 0x00, 0x00, 0x00, 0x02, 0x00 };
  93 static uint8_t scsi_ztestor_eject[] =   { 0x85, 0x01, 0x01, 0x01, 0x18, 0x01,
  94                                           0x01, 0x01, 0x01, 0x01, 0x00, 0x00 };
  95 static uint8_t scsi_cmotech_eject[] =   { 0xff, 0x52, 0x44, 0x45, 0x56, 0x43,
  96                                           0x48, 0x47 };
  97 static uint8_t scsi_huawei_eject[] =    { 0x11, 0x06, 0x00, 0x00, 0x00, 0x00,
  98                                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  99                                           0x00, 0x00, 0x00, 0x00 };
 100 static uint8_t scsi_tct_eject[] =       { 0x06, 0xf5, 0x04, 0x02, 0x52, 0x70 };
 101
 102 #define BULK_SIZE               64      /* dummy */
 103 #define ERR_CSW_FAILED          -1
 104
 105 /* Command Block Wrapper */
 106 struct bbb_cbw {
 107         uDWord  dCBWSignature;
 108 #define CBWSIGNATURE    0x43425355
 109         uDWord  dCBWTag;
 110         uDWord  dCBWDataTransferLength;
 111         uByte   bCBWFlags;
 112 #define CBWFLAGS_OUT    0x00
 113 #define CBWFLAGS_IN     0x80
 114         uByte   bCBWLUN;
 115         uByte   bCDBLength;
 116 #define CBWCDBLENGTH    16
 117         uByte   CBWCDB[CBWCDBLENGTH];
 118 } __packed;
 119
 120 /* Command Status Wrapper */
 121 struct bbb_csw {
 122         uDWord  dCSWSignature;
 123 #define CSWSIGNATURE    0x53425355
 124         uDWord  dCSWTag;
 125         uDWord  dCSWDataResidue;
 126         uByte   bCSWStatus;
 127 #define CSWSTATUS_GOOD  0x0
 128 #define CSWSTATUS_FAILED        0x1
 129 #define CSWSTATUS_PHASE 0x2
 130 } __packed;
 131
 132 struct bbb_transfer {
 133         struct mtx mtx;
 134         struct cv cv;
 135         struct bbb_cbw cbw;
 136         struct bbb_csw csw;
 137
 138         struct usb_xfer *xfer[ST_MAX];
 139
 140         uint8_t *data_ptr;
 141
 142         usb_size_t data_len;            /* bytes */
 143         usb_size_t data_rem;            /* bytes */
 144         usb_timeout_t data_timeout;     /* ms */
 145         usb_frlength_t actlen;          /* bytes */
 146
 147         uint8_t cmd_len;                /* bytes */
 148         uint8_t dir;
 149         uint8_t lun;
 150         uint8_t state;
 151         uint8_t status_try;
 152         int     error;
 153
 154         uint8_t buffer[256];
 155 };
 156
 157 static usb_callback_t bbb_command_callback;
 158 static usb_callback_t bbb_data_read_callback;
 159 static usb_callback_t bbb_data_rd_cs_callback;
 160 static usb_callback_t bbb_data_write_callback;
 161 static usb_callback_t bbb_data_wr_cs_callback;
 162 static usb_callback_t bbb_status_callback;
 163
 164 static void     bbb_done(struct bbb_transfer *, int);
 165 static void     bbb_transfer_start(struct bbb_transfer *, uint8_t);
 166 static void     bbb_data_clear_stall_callback(struct usb_xfer *, uint8_t,
 167                     uint8_t);
 168 static uint8_t bbb_command_start(struct bbb_transfer *, uint8_t, uint8_t,
 169                     void *, size_t, void *, size_t, usb_timeout_t);
 170 static struct bbb_transfer *bbb_attach(struct usb_device *, uint8_t);
 171 static void     bbb_detach(struct bbb_transfer *);
 172
 173 static const struct usb_config bbb_config[ST_MAX] = {
 174
 175         [ST_COMMAND] = {
 176                 .type = UE_BULK,
 177                 .endpoint = UE_ADDR_ANY,
 178                 .direction = UE_DIR_OUT,
 179                 .bufsize = sizeof(struct bbb_cbw),
 180                 .callback = &bbb_command_callback,
 181                 .timeout = 4 * USB_MS_HZ,       /* 4 seconds */
 182         },
 183
 184         [ST_DATA_RD] = {
 185                 .type = UE_BULK,
 186                 .endpoint = UE_ADDR_ANY,
 187                 .direction = UE_DIR_IN,
 188                 .bufsize = BULK_SIZE,
 189                 .flags = {.proxy_buffer = 1,.short_xfer_ok = 1,},
 190                 .callback = &bbb_data_read_callback,
 191                 .timeout = 4 * USB_MS_HZ,       /* 4 seconds */
 192         },
 193
 194         [ST_DATA_RD_CS] = {
 195                 .type = UE_CONTROL,
 196                 .endpoint = 0x00,       /* Control pipe */
 197                 .direction = UE_DIR_ANY,
 198                 .bufsize = sizeof(struct usb_device_request),
 199                 .callback = &bbb_data_rd_cs_callback,
 200                 .timeout = 1 * USB_MS_HZ,       /* 1 second  */
 201         },
 202
 203         [ST_DATA_WR] = {
 204                 .type = UE_BULK,
 205                 .endpoint = UE_ADDR_ANY,
 206                 .direction = UE_DIR_OUT,
 207                 .bufsize = BULK_SIZE,
 208                 .flags = {.proxy_buffer = 1,},
 209                 .callback = &bbb_data_write_callback,
 210                 .timeout = 4 * USB_MS_HZ,       /* 4 seconds */
 211         },
 212
 213         [ST_DATA_WR_CS] = {
 214                 .type = UE_CONTROL,
 215                 .endpoint = 0x00,       /* Control pipe */
 216                 .direction = UE_DIR_ANY,
 217                 .bufsize = sizeof(struct usb_device_request),
 218                 .callback = &bbb_data_wr_cs_callback,
 219                 .timeout = 1 * USB_MS_HZ,       /* 1 second  */
 220         },
 221
 222         [ST_STATUS] = {
 223                 .type = UE_BULK,
 224                 .endpoint = UE_ADDR_ANY,
 225                 .direction = UE_DIR_IN,
 226                 .bufsize = sizeof(struct bbb_csw),
 227                 .flags = {.short_xfer_ok = 1,},
 228                 .callback = &bbb_status_callback,
 229                 .timeout = 1 * USB_MS_HZ,       /* 1 second  */
 230         },
 231 };
 232
 233 static void
 234 bbb_done(struct bbb_transfer *sc, int error)
 235 {
 236
 237         sc->error = error;
 238         sc->state = ST_COMMAND;
 239         sc->status_try = 1;
 240         cv_signal(&sc->cv);
 241 }
 242
 243 static void
 244 bbb_transfer_start(struct bbb_transfer *sc, uint8_t xfer_index)
 245 {
 246         sc->state = xfer_index;
 247         usbd_transfer_start(sc->xfer[xfer_index]);
 248 }
 249
 250 static void
 251 bbb_data_clear_stall_callback(struct usb_xfer *xfer,
 252     uint8_t next_xfer, uint8_t stall_xfer)
 253 {
 254         struct bbb_transfer *sc = usbd_xfer_softc(xfer);
 255
 256         if (usbd_clear_stall_callback(xfer, sc->xfer[stall_xfer])) {
 257                 switch (USB_GET_STATE(xfer)) {
 258                 case USB_ST_SETUP:
 259                 case USB_ST_TRANSFERRED:
 260                         bbb_transfer_start(sc, next_xfer);
 261                         break;
 262                 default:
 263                         bbb_done(sc, USB_ERR_STALLED);
 264                         break;
 265                 }
 266         }
 267 }
 268
 269 static void
 270 bbb_command_callback(struct usb_xfer *xfer, usb_error_t error)
 271 {
 272         struct bbb_transfer *sc = usbd_xfer_softc(xfer);
 273         uint32_t tag;
 274
 275         switch (USB_GET_STATE(xfer)) {
 276         case USB_ST_TRANSFERRED:
 277                 bbb_transfer_start
 278                     (sc, ((sc->dir == DIR_IN) ? ST_DATA_RD :
 279                     (sc->dir == DIR_OUT) ? ST_DATA_WR :
 280                     ST_STATUS));
 281                 break;
 282
 283         case USB_ST_SETUP:
 284                 sc->status_try = 0;
 285                 tag = UGETDW(sc->cbw.dCBWTag) + 1;
 286                 USETDW(sc->cbw.dCBWSignature, CBWSIGNATURE);
 287                 USETDW(sc->cbw.dCBWTag, tag);
 288                 USETDW(sc->cbw.dCBWDataTransferLength, (uint32_t)sc->data_len);
 289                 sc->cbw.bCBWFlags = ((sc->dir == DIR_IN) ? CBWFLAGS_IN : CBWFLAGS_OUT);
 290                 sc->cbw.bCBWLUN = sc->lun;
 291                 sc->cbw.bCDBLength = sc->cmd_len;
 292                 if (sc->cbw.bCDBLength > sizeof(sc->cbw.CBWCDB)) {
 293                         sc->cbw.bCDBLength = sizeof(sc->cbw.CBWCDB);
 294                         DPRINTFN(0, "Truncating long command\n");
 295                 }
 296                 usbd_xfer_set_frame_data(xfer, 0, &sc->cbw, sizeof(sc->cbw));
 297                 usbd_transfer_submit(xfer);
 298                 break;
 299
 300         default:                        /* Error */
 301                 bbb_done(sc, error);
 302                 break;
 303         }
 304 }
 305
 306 static void
 307 bbb_data_read_callback(struct usb_xfer *xfer, usb_error_t error)
 308 {
 309         struct bbb_transfer *sc = usbd_xfer_softc(xfer);
 310         usb_frlength_t max_bulk = usbd_xfer_max_len(xfer);
 311         int actlen, sumlen;
 312
 313         usbd_xfer_status(xfer, &actlen, &sumlen, NULL, NULL);
 314
 315         switch (USB_GET_STATE(xfer)) {
 316         case USB_ST_TRANSFERRED:
 317                 sc->data_rem -= actlen;
 318                 sc->data_ptr += actlen;
 319                 sc->actlen += actlen;
 320
 321                 if (actlen < sumlen) {
 322                         /* short transfer */
 323                         sc->data_rem = 0;
 324                 }
 325         case USB_ST_SETUP:
 326                 DPRINTF("max_bulk=%d, data_rem=%d\n",
 327                     max_bulk, sc->data_rem);
 328
 329                 if (sc->data_rem == 0) {
 330                         bbb_transfer_start(sc, ST_STATUS);
 331                         break;
 332                 }
 333                 if (max_bulk > sc->data_rem) {
 334                         max_bulk = sc->data_rem;
 335                 }
 336                 usbd_xfer_set_timeout(xfer, sc->data_timeout);
 337                 usbd_xfer_set_frame_data(xfer, 0, sc->data_ptr, max_bulk);
 338                 usbd_transfer_submit(xfer);
 339                 break;
 340
 341         default:                        /* Error */
 342                 if (error == USB_ERR_CANCELLED) {
 343                         bbb_done(sc, error);
 344                 } else {
 345                         bbb_transfer_start(sc, ST_DATA_RD_CS);
 346                 }
 347                 break;
 348         }
 349 }
 350
 351 static void
 352 bbb_data_rd_cs_callback(struct usb_xfer *xfer, usb_error_t error)
 353 {
 354         bbb_data_clear_stall_callback(xfer, ST_STATUS,
 355             ST_DATA_RD);
 356 }
 357
 358 static void
 359 bbb_data_write_callback(struct usb_xfer *xfer, usb_error_t error)
 360 {
 361         struct bbb_transfer *sc = usbd_xfer_softc(xfer);
 362         usb_frlength_t max_bulk = usbd_xfer_max_len(xfer);
 363         int actlen, sumlen;
 364
 365         usbd_xfer_status(xfer, &actlen, &sumlen, NULL, NULL);
 366
 367         switch (USB_GET_STATE(xfer)) {
 368         case USB_ST_TRANSFERRED:
 369                 sc->data_rem -= actlen;
 370                 sc->data_ptr += actlen;
 371                 sc->actlen += actlen;
 372
 373                 if (actlen < sumlen) {
 374                         /* short transfer */
 375                         sc->data_rem = 0;
 376                 }
 377         case USB_ST_SETUP:
 378                 DPRINTF("max_bulk=%d, data_rem=%d\n",
 379                     max_bulk, sc->data_rem);
 380
 381                 if (sc->data_rem == 0) {
 382                         bbb_transfer_start(sc, ST_STATUS);
 383                         return;
 384                 }
 385                 if (max_bulk > sc->data_rem) {
 386                         max_bulk = sc->data_rem;
 387                 }
 388                 usbd_xfer_set_timeout(xfer, sc->data_timeout);
 389                 usbd_xfer_set_frame_data(xfer, 0, sc->data_ptr, max_bulk);
 390                 usbd_transfer_submit(xfer);
 391                 return;
 392
 393         default:                        /* Error */
 394                 if (error == USB_ERR_CANCELLED) {
 395                         bbb_done(sc, error);
 396                 } else {
 397                         bbb_transfer_start(sc, ST_DATA_WR_CS);
 398                 }
 399                 return;
 400
 401         }
 402 }
 403
 404 static void
 405 bbb_data_wr_cs_callback(struct usb_xfer *xfer, usb_error_t error)
 406 {
 407         bbb_data_clear_stall_callback(xfer, ST_STATUS,
 408             ST_DATA_WR);
 409 }
 410
 411 static void
 412 bbb_status_callback(struct usb_xfer *xfer, usb_error_t error)
 413 {
 414         struct bbb_transfer *sc = usbd_xfer_softc(xfer);
 415         int actlen, sumlen;
 416
 417         usbd_xfer_status(xfer, &actlen, &sumlen, NULL, NULL);
 418
 419         switch (USB_GET_STATE(xfer)) {
 420         case USB_ST_TRANSFERRED:
 421
 422                 /* very simple status check */
 423
 424                 if (actlen < sizeof(sc->csw)) {
 425                         bbb_done(sc, USB_ERR_SHORT_XFER);
 426                 } else if (sc->csw.bCSWStatus == CSWSTATUS_GOOD) {
 427                         bbb_done(sc, 0);        /* success */
 428                 } else {
 429                         bbb_done(sc, ERR_CSW_FAILED);   /* error */
 430                 }
 431                 break;
 432
 433         case USB_ST_SETUP:
 434                 usbd_xfer_set_frame_data(xfer, 0, &sc->csw, sizeof(sc->csw));
 435                 usbd_transfer_submit(xfer);
 436                 break;
 437
 438         default:
 439                 DPRINTF("Failed to read CSW: %s, try %d\n",
 440                     usbd_errstr(error), sc->status_try);
 441
 442                 if (error == USB_ERR_CANCELLED || sc->status_try) {
 443                         bbb_done(sc, error);
 444                 } else {
 445                         sc->status_try = 1;
 446                         bbb_transfer_start(sc, ST_DATA_RD_CS);
 447                 }
 448                 break;
 449         }
 450 }
 451
 452 /*------------------------------------------------------------------------*
 453  *      bbb_command_start - execute a SCSI command synchronously
 454  *
 455  * Return values
 456  * 0: Success
 457  * Else: Failure
 458  *------------------------------------------------------------------------*/
 459 static uint8_t
 460 bbb_command_start(struct bbb_transfer *sc, uint8_t dir, uint8_t lun,
 461     void *data_ptr, size_t data_len, void *cmd_ptr, size_t cmd_len,
 462     usb_timeout_t data_timeout)
 463 {
 464         sc->lun = lun;
 465         sc->dir = data_len ? dir : DIR_NONE;
 466         sc->data_ptr = data_ptr;
 467         sc->data_len = data_len;
 468         sc->data_rem = data_len;
 469         sc->data_timeout = (data_timeout + USB_MS_HZ);
 470         sc->actlen = 0;
 471         sc->cmd_len = cmd_len;
 472         bzero(&sc->cbw.CBWCDB, sizeof(sc->cbw.CBWCDB));
 473         bcopy(cmd_ptr, &sc->cbw.CBWCDB, cmd_len);
 474         DPRINTFN(1, "SCSI cmd = %*D\n", (int)cmd_len, &sc->cbw.CBWCDB, ":");
 475
 476         mtx_lock(&sc->mtx);
 477         usbd_transfer_start(sc->xfer[sc->state]);
 478
 479         while (usbd_transfer_pending(sc->xfer[sc->state])) {
 480                 cv_wait(&sc->cv, &sc->mtx);
 481         }
 482         mtx_unlock(&sc->mtx);
 483         return (sc->error);
 484 }
 485
 486 static struct bbb_transfer *
 487 bbb_attach(struct usb_device *udev, uint8_t iface_index)
 488 {
 489         struct usb_interface *iface;
 490         struct usb_interface_descriptor *id;
 491         struct bbb_transfer *sc;
 492         usb_error_t err;
 493
 494         iface = usbd_get_iface(udev, iface_index);
 495         if (iface == NULL)
 496                 return (NULL);
 497
 498         id = iface->idesc;
 499         if (id == NULL || id->bInterfaceClass != UICLASS_MASS)
 500                 return (NULL);
 501
 502         switch (id->bInterfaceSubClass) {
 503         case UISUBCLASS_SCSI:
 504         case UISUBCLASS_UFI:
 505         case UISUBCLASS_SFF8020I:
 506         case UISUBCLASS_SFF8070I:
 507                 break;
 508         default:
 509                 return (NULL);
 510         }
 511
 512         switch (id->bInterfaceProtocol) {
 513         case UIPROTO_MASS_BBB_OLD:
 514         case UIPROTO_MASS_BBB:
 515                 break;
 516         default:
 517                 return (NULL);
 518         }
 519
 520         sc = malloc(sizeof(*sc), M_USB, M_WAITOK | M_ZERO);
 521         mtx_init(&sc->mtx, "USB autoinstall", NULL, MTX_DEF);
 522         cv_init(&sc->cv, "WBBB");
 523
 524         err = usbd_transfer_setup(udev, &iface_index, sc->xfer, bbb_config,
 525             ST_MAX, sc, &sc->mtx);
 526         if (err) {
 527                 bbb_detach(sc);
 528                 return (NULL);
 529         }
 530         return (sc);
 531 }
 532
 533 static void
 534 bbb_detach(struct bbb_transfer *sc)
 535 {
 536         usbd_transfer_unsetup(sc->xfer, ST_MAX);
 537         mtx_destroy(&sc->mtx);
 538         cv_destroy(&sc->cv);
 539         free(sc, M_USB);
 540 }
 541
 542 /*------------------------------------------------------------------------*
 543  *      usb_iface_is_cdrom
 544  *
 545  * Return values:
 546  * 1: This interface is an auto install disk (CD-ROM)
 547  * 0: Not an auto install disk.
 548  *------------------------------------------------------------------------*/
 549 int
 550 usb_iface_is_cdrom(struct usb_device *udev, uint8_t iface_index)
 551 {
 552         struct bbb_transfer *sc;
 553         usb_error_t err;
 554         uint8_t timeout, is_cdrom;
 555         uint8_t sid_type;
 556
 557         sc = bbb_attach(udev, iface_index);
 558         if (sc == NULL)
 559                 return (0);
 560
 561         is_cdrom = 0;
 562         timeout = 4;    /* tries */
 563         while (--timeout) {
 564                 err = bbb_command_start(sc, DIR_IN, 0, sc->buffer,
 565                     SCSI_INQ_LEN, &scsi_inquiry, sizeof(scsi_inquiry),
 566                     USB_MS_HZ);
 567
 568                 if (err == 0 && sc->actlen > 0) {
 569                         sid_type = sc->buffer[0] & 0x1F;
 570                         if (sid_type == 0x05)
 571                                 is_cdrom = 1;
 572                         break;
 573                 } else if (err != ERR_CSW_FAILED)
 574                         break;  /* non retryable error */
 575                 usb_pause_mtx(NULL, hz);
 576         }
 577         bbb_detach(sc);
 578         return (is_cdrom);
 579 }
 580
 581 usb_error_t
 582 usb_msc_eject(struct usb_device *udev, uint8_t iface_index, int method)
 583 {
 584         struct bbb_transfer *sc;
 585         usb_error_t err;
 586
 587         sc = bbb_attach(udev, iface_index);
 588         if (sc == NULL)
 589                 return (USB_ERR_INVAL);
 590
 591         err = 0;
 592         switch (method) {
 593         case MSC_EJECT_STOPUNIT:
 594                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 595                     &scsi_test_unit_ready, sizeof(scsi_test_unit_ready),
 596                     USB_MS_HZ);
 597                 DPRINTF("Test unit ready status: %s\n", usbd_errstr(err));
 598                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 599                     &scsi_start_stop_unit, sizeof(scsi_start_stop_unit),
 600                     USB_MS_HZ);
 601                 break;
 602         case MSC_EJECT_REZERO:
 603                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 604                     &scsi_rezero_init, sizeof(scsi_rezero_init),
 605                     USB_MS_HZ);
 606                 break;
 607         case MSC_EJECT_ZTESTOR:
 608                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 609                     &scsi_ztestor_eject, sizeof(scsi_ztestor_eject),
 610                     USB_MS_HZ);
 611                 break;
 612         case MSC_EJECT_CMOTECH:
 613                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 614                     &scsi_cmotech_eject, sizeof(scsi_cmotech_eject),
 615                     USB_MS_HZ);
 616                 break;
 617         case MSC_EJECT_HUAWEI:
 618                 err = bbb_command_start(sc, DIR_IN, 0, NULL, 0,
 619                     &scsi_huawei_eject, sizeof(scsi_huawei_eject),
 620                     USB_MS_HZ);
 621                 break;
 622         case MSC_EJECT_TCT:
 623                 /*
 624                  * TCTMobile needs DIR_IN flag. To get it, we
 625                  * supply a dummy data with the command.
 626                  */
 627                 err = bbb_command_start(sc, DIR_IN, 0, &sc->buffer,
 628                     sizeof(sc->buffer), &scsi_tct_eject,
 629                     sizeof(scsi_tct_eject), USB_MS_HZ);
 630                 break;
 631         default:
 632                 printf("usb_msc_eject: unknown eject method (%d)\n", method);
 633                 break;
 634         }
 635         DPRINTF("Eject CD command status: %s\n", usbd_errstr(err));
 636
 637         bbb_detach(sc);
 638         return (0);
 639 }