sys/bus/u4b/serial/umct.c

   1 /*-
   2  * Copyright (c) 2003 Scott Long
   3  * 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 /*
  29  * Driver for the MCT (Magic Control Technology) USB-RS232 Converter.
  30  * Based on the superb documentation from the linux mct_u232 driver by
  31  * Wolfgang Grandeggar <wolfgang@cec.ch>.
  32  * This device smells a lot like the Belkin F5U103, except that it has
  33  * suffered some mild brain-damage.  This driver is based off of the ubsa.c
  34  * driver from Alexander Kabaev <kan@FreeBSD.org>.  Merging the two together
  35  * might be useful, though the subtle differences might lead to lots of
  36  * #ifdef's.
  37  */
  38
  39 /*
  40  * NOTE: all function names beginning like "umct_cfg_" can only
  41  * be called from within the config thread function !
  42  */
  43
  44 #include <sys/stdint.h>
  45 #include <sys/param.h>
  46 #include <sys/queue.h>
  47 #include <sys/types.h>
  48 #include <sys/systm.h>
  49 #include <sys/kernel.h>
  50 #include <sys/bus.h>
  51 #include <sys/module.h>
  52 #include <sys/lock.h>
  53 #include <sys/condvar.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/unistd.h>
  56 #include <sys/callout.h>
  57 #include <sys/malloc.h>
  58 #include <sys/priv.h>
  59
  60 #include <bus/u4b/usb.h>
  61 #include <bus/u4b/usbdi.h>
  62 #include <bus/u4b/usbdi_util.h>
  63 #include <bus/u4b/usbdevs.h>
  64
  65 #define USB_DEBUG_VAR usb_debug
  66 #include <bus/u4b/usb_debug.h>
  67 #include <bus/u4b/usb_process.h>
  68
  69 #include <bus/u4b/serial/usb_serial.h>
  70
  71 /* The UMCT advertises the standard 8250 UART registers */
  72 #define UMCT_GET_MSR            2       /* Get Modem Status Register */
  73 #define UMCT_GET_MSR_SIZE       1
  74 #define UMCT_GET_LCR            6       /* Get Line Control Register */
  75 #define UMCT_GET_LCR_SIZE       1
  76 #define UMCT_SET_BAUD           5       /* Set the Baud Rate Divisor */
  77 #define UMCT_SET_BAUD_SIZE      4
  78 #define UMCT_SET_LCR            7       /* Set Line Control Register */
  79 #define UMCT_SET_LCR_SIZE       1
  80 #define UMCT_SET_MCR            10      /* Set Modem Control Register */
  81 #define UMCT_SET_MCR_SIZE       1
  82
  83 #define UMCT_INTR_INTERVAL      100
  84 #define UMCT_IFACE_INDEX        0
  85 #define UMCT_CONFIG_INDEX       0
  86
  87 enum {
  88         UMCT_BULK_DT_WR,
  89         UMCT_BULK_DT_RD,
  90         UMCT_INTR_DT_RD,
  91         UMCT_N_TRANSFER,
  92 };
  93
  94 struct umct_softc {
  95         struct ucom_super_softc sc_super_ucom;
  96         struct ucom_softc sc_ucom;
  97
  98         struct usb_device *sc_udev;
  99         struct usb_xfer *sc_xfer[UMCT_N_TRANSFER];
 100         struct lock sc_lock;
 101
 102         uint32_t sc_unit;
 103
 104         uint16_t sc_obufsize;
 105
 106         uint8_t sc_lsr;
 107         uint8_t sc_msr;
 108         uint8_t sc_lcr;
 109         uint8_t sc_mcr;
 110         uint8_t sc_iface_no;
 111         uint8_t sc_swap_cb;
 112         uint8_t sc_name[16];
 113 };
 114
 115 /* prototypes */
 116
 117 static device_probe_t umct_probe;
 118 static device_attach_t umct_attach;
 119 static device_detach_t umct_detach;
 120
 121 static usb_callback_t umct_intr_callback;
 122 static usb_callback_t umct_intr_callback_sub;
 123 static usb_callback_t umct_read_callback;
 124 static usb_callback_t umct_read_callback_sub;
 125 static usb_callback_t umct_write_callback;
 126
 127 static void     umct_cfg_do_request(struct umct_softc *sc, uint8_t request,
 128                     uint16_t len, uint32_t value);
 129 static void     umct_cfg_get_status(struct ucom_softc *, uint8_t *,
 130                     uint8_t *);
 131 static void     umct_cfg_set_break(struct ucom_softc *, uint8_t);
 132 static void     umct_cfg_set_dtr(struct ucom_softc *, uint8_t);
 133 static void     umct_cfg_set_rts(struct ucom_softc *, uint8_t);
 134 static uint8_t  umct_calc_baud(uint32_t);
 135 static int      umct_pre_param(struct ucom_softc *, struct termios *);
 136 static void     umct_cfg_param(struct ucom_softc *, struct termios *);
 137 static void     umct_start_read(struct ucom_softc *);
 138 static void     umct_stop_read(struct ucom_softc *);
 139 static void     umct_start_write(struct ucom_softc *);
 140 static void     umct_stop_write(struct ucom_softc *);
 141 static void     umct_poll(struct ucom_softc *ucom);
 142
 143 static const struct usb_config umct_config[UMCT_N_TRANSFER] = {
 144
 145         [UMCT_BULK_DT_WR] = {
 146                 .type = UE_BULK,
 147                 .endpoint = UE_ADDR_ANY,
 148                 .direction = UE_DIR_OUT,
 149                 .bufsize = 0,   /* use wMaxPacketSize */
 150                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
 151                 .callback = &umct_write_callback,
 152         },
 153
 154         [UMCT_BULK_DT_RD] = {
 155                 .type = UE_INTERRUPT,
 156                 .endpoint = UE_ADDR_ANY,
 157                 .direction = UE_DIR_IN,
 158                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 159                 .bufsize = 0,   /* use wMaxPacketSize */
 160                 .callback = &umct_read_callback,
 161                 .ep_index = 0,          /* first interrupt endpoint */
 162         },
 163
 164         [UMCT_INTR_DT_RD] = {
 165                 .type = UE_INTERRUPT,
 166                 .endpoint = UE_ADDR_ANY,
 167                 .direction = UE_DIR_IN,
 168                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 169                 .bufsize = 0,   /* use wMaxPacketSize */
 170                 .callback = &umct_intr_callback,
 171                 .ep_index = 1,          /* second interrupt endpoint */
 172         },
 173 };
 174
 175 static const struct ucom_callback umct_callback = {
 176         .ucom_cfg_get_status = &umct_cfg_get_status,
 177         .ucom_cfg_set_dtr = &umct_cfg_set_dtr,
 178         .ucom_cfg_set_rts = &umct_cfg_set_rts,
 179         .ucom_cfg_set_break = &umct_cfg_set_break,
 180         .ucom_cfg_param = &umct_cfg_param,
 181         .ucom_pre_param = &umct_pre_param,
 182         .ucom_start_read = &umct_start_read,
 183         .ucom_stop_read = &umct_stop_read,
 184         .ucom_start_write = &umct_start_write,
 185         .ucom_stop_write = &umct_stop_write,
 186         .ucom_poll = &umct_poll,
 187 };
 188
 189 static const STRUCT_USB_HOST_ID umct_devs[] = {
 190         {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232, 0)},
 191         {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232, 0)},
 192         {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232, 0)},
 193         {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109, 0)},
 194         {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409, 0)},
 195 };
 196
 197 static device_method_t umct_methods[] = {
 198         DEVMETHOD(device_probe, umct_probe),
 199         DEVMETHOD(device_attach, umct_attach),
 200         DEVMETHOD(device_detach, umct_detach),
 201         DEVMETHOD_END
 202 };
 203
 204 static devclass_t umct_devclass;
 205
 206 static driver_t umct_driver = {
 207         .name = "umct",
 208         .methods = umct_methods,
 209         .size = sizeof(struct umct_softc),
 210 };
 211
 212 DRIVER_MODULE(umct, uhub, umct_driver, umct_devclass, NULL, 0);
 213 MODULE_DEPEND(umct, ucom, 1, 1, 1);
 214 MODULE_DEPEND(umct, usb, 1, 1, 1);
 215 MODULE_VERSION(umct, 1);
 216
 217 static int
 218 umct_probe(device_t dev)
 219 {
 220         struct usb_attach_arg *uaa = device_get_ivars(dev);
 221
 222         if (uaa->usb_mode != USB_MODE_HOST) {
 223                 return (ENXIO);
 224         }
 225         if (uaa->info.bConfigIndex != UMCT_CONFIG_INDEX) {
 226                 return (ENXIO);
 227         }
 228         if (uaa->info.bIfaceIndex != UMCT_IFACE_INDEX) {
 229                 return (ENXIO);
 230         }
 231         return (usbd_lookup_id_by_uaa(umct_devs, sizeof(umct_devs), uaa));
 232 }
 233
 234 static int
 235 umct_attach(device_t dev)
 236 {
 237         struct usb_attach_arg *uaa = device_get_ivars(dev);
 238         struct umct_softc *sc = device_get_softc(dev);
 239         int32_t error;
 240         uint16_t maxp;
 241         uint8_t iface_index;
 242
 243         sc->sc_udev = uaa->device;
 244         sc->sc_unit = device_get_unit(dev);
 245
 246         device_set_usb_desc(dev);
 247         lockinit(&sc->sc_lock, "umct", 0, LK_CANRECURSE);
 248
 249         ksnprintf(sc->sc_name, sizeof(sc->sc_name),
 250             "%s", device_get_nameunit(dev));
 251
 252         sc->sc_iface_no = uaa->info.bIfaceNum;
 253
 254         iface_index = UMCT_IFACE_INDEX;
 255         error = usbd_transfer_setup(uaa->device, &iface_index,
 256             sc->sc_xfer, umct_config, UMCT_N_TRANSFER, sc, &sc->sc_lock);
 257
 258         if (error) {
 259                 device_printf(dev, "allocating USB "
 260                     "transfers failed\n");
 261                 goto detach;
 262         }
 263
 264         /*
 265          * The real bulk-in endpoint is also marked as an interrupt.
 266          * The only way to differentiate it from the real interrupt
 267          * endpoint is to look at the wMaxPacketSize field.
 268          */
 269         maxp = usbd_xfer_max_framelen(sc->sc_xfer[UMCT_BULK_DT_RD]);
 270         if (maxp == 0x2) {
 271
 272                 /* guessed wrong - switch around endpoints */
 273
 274                 struct usb_xfer *temp = sc->sc_xfer[UMCT_INTR_DT_RD];
 275
 276                 sc->sc_xfer[UMCT_INTR_DT_RD] = sc->sc_xfer[UMCT_BULK_DT_RD];
 277                 sc->sc_xfer[UMCT_BULK_DT_RD] = temp;
 278                 sc->sc_swap_cb = 1;
 279         }
 280
 281         sc->sc_obufsize = usbd_xfer_max_len(sc->sc_xfer[UMCT_BULK_DT_WR]);
 282
 283         if (uaa->info.idProduct == USB_PRODUCT_MCT_SITECOM_USB232) {
 284                 if (sc->sc_obufsize > 16) {
 285                         sc->sc_obufsize = 16;
 286                 }
 287         }
 288         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
 289             &umct_callback, &sc->sc_lock);
 290         if (error) {
 291                 goto detach;
 292         }
 293         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
 294
 295         return (0);                     /* success */
 296
 297 detach:
 298         umct_detach(dev);
 299         return (ENXIO);                 /* failure */
 300 }
 301
 302 static int
 303 umct_detach(device_t dev)
 304 {
 305         struct umct_softc *sc = device_get_softc(dev);
 306
 307         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
 308         usbd_transfer_unsetup(sc->sc_xfer, UMCT_N_TRANSFER);
 309         lockuninit(&sc->sc_lock);
 310
 311         return (0);
 312 }
 313
 314 static void
 315 umct_cfg_do_request(struct umct_softc *sc, uint8_t request,
 316     uint16_t len, uint32_t value)
 317 {
 318         struct usb_device_request req;
 319         usb_error_t err;
 320         uint8_t temp[4];
 321
 322         if (len > 4)
 323                 len = 4;
 324         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 325         req.bRequest = request;
 326         USETW(req.wValue, 0);
 327         req.wIndex[0] = sc->sc_iface_no;
 328         req.wIndex[1] = 0;
 329         USETW(req.wLength, len);
 330         USETDW(temp, value);
 331
 332         err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 333             &req, temp, 0, 1000);
 334         if (err) {
 335                 DPRINTFN(0, "device request failed, err=%s "
 336                     "(ignored)\n", usbd_errstr(err));
 337         }
 338         return;
 339 }
 340
 341 static void
 342 umct_intr_callback_sub(struct usb_xfer *xfer, usb_error_t error)
 343 {
 344         struct umct_softc *sc = usbd_xfer_softc(xfer);
 345         struct usb_page_cache *pc;
 346         uint8_t buf[2];
 347         int actlen;
 348
 349         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 350
 351         switch (USB_GET_STATE(xfer)) {
 352         case USB_ST_TRANSFERRED:
 353                 if (actlen < 2) {
 354                         DPRINTF("too short message\n");
 355                         goto tr_setup;
 356                 }
 357                 pc = usbd_xfer_get_frame(xfer, 0);
 358                 usbd_copy_out(pc, 0, buf, sizeof(buf));
 359
 360                 sc->sc_msr = buf[0];
 361                 sc->sc_lsr = buf[1];
 362
 363                 ucom_status_change(&sc->sc_ucom);
 364
 365         case USB_ST_SETUP:
 366 tr_setup:
 367                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 368                 usbd_transfer_submit(xfer);
 369                 return;
 370
 371         default:                        /* Error */
 372                 if (error != USB_ERR_CANCELLED) {
 373                         /* try to clear stall first */
 374                         usbd_xfer_set_stall(xfer);
 375                         goto tr_setup;
 376                 }
 377                 return;
 378         }
 379 }
 380
 381 static void
 382 umct_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
 383 {
 384         struct umct_softc *sc = ucom->sc_parent;
 385
 386         *lsr = sc->sc_lsr;
 387         *msr = sc->sc_msr;
 388 }
 389
 390 static void
 391 umct_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
 392 {
 393         struct umct_softc *sc = ucom->sc_parent;
 394
 395         if (onoff)
 396                 sc->sc_lcr |= 0x40;
 397         else
 398                 sc->sc_lcr &= ~0x40;
 399
 400         umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr);
 401 }
 402
 403 static void
 404 umct_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
 405 {
 406         struct umct_softc *sc = ucom->sc_parent;
 407
 408         if (onoff)
 409                 sc->sc_mcr |= 0x01;
 410         else
 411                 sc->sc_mcr &= ~0x01;
 412
 413         umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
 414 }
 415
 416 static void
 417 umct_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
 418 {
 419         struct umct_softc *sc = ucom->sc_parent;
 420
 421         if (onoff)
 422                 sc->sc_mcr |= 0x02;
 423         else
 424                 sc->sc_mcr &= ~0x02;
 425
 426         umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
 427 }
 428
 429 static uint8_t
 430 umct_calc_baud(uint32_t baud)
 431 {
 432         switch (baud) {
 433                 case B300:return (0x1);
 434         case B600:
 435                 return (0x2);
 436         case B1200:
 437                 return (0x3);
 438         case B2400:
 439                 return (0x4);
 440         case B4800:
 441                 return (0x6);
 442         case B9600:
 443                 return (0x8);
 444         case B19200:
 445                 return (0x9);
 446         case B38400:
 447                 return (0xa);
 448         case B57600:
 449                 return (0xb);
 450         case 115200:
 451                 return (0xc);
 452         case B0:
 453         default:
 454                 break;
 455         }
 456         return (0x0);
 457 }
 458
 459 static int
 460 umct_pre_param(struct ucom_softc *ucom, struct termios *t)
 461 {
 462         return (0);                     /* we accept anything */
 463 }
 464
 465 static void
 466 umct_cfg_param(struct ucom_softc *ucom, struct termios *t)
 467 {
 468         struct umct_softc *sc = ucom->sc_parent;
 469         uint32_t value;
 470
 471         value = umct_calc_baud(t->c_ospeed);
 472         umct_cfg_do_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value);
 473
 474         value = (sc->sc_lcr & 0x40);
 475
 476         switch (t->c_cflag & CSIZE) {
 477         case CS5:
 478                 value |= 0x0;
 479                 break;
 480         case CS6:
 481                 value |= 0x1;
 482                 break;
 483         case CS7:
 484                 value |= 0x2;
 485                 break;
 486         default:
 487         case CS8:
 488                 value |= 0x3;
 489                 break;
 490         }
 491
 492         value |= (t->c_cflag & CSTOPB) ? 0x4 : 0;
 493         if (t->c_cflag & PARENB) {
 494                 value |= 0x8;
 495                 value |= (t->c_cflag & PARODD) ? 0x0 : 0x10;
 496         }
 497         /*
 498          * XXX There doesn't seem to be a way to tell the device
 499          * to use flow control.
 500          */
 501
 502         sc->sc_lcr = value;
 503         umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value);
 504 }
 505
 506 static void
 507 umct_start_read(struct ucom_softc *ucom)
 508 {
 509         struct umct_softc *sc = ucom->sc_parent;
 510
 511         /* start interrupt endpoint */
 512         usbd_transfer_start(sc->sc_xfer[UMCT_INTR_DT_RD]);
 513
 514         /* start read endpoint */
 515         usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_RD]);
 516 }
 517
 518 static void
 519 umct_stop_read(struct ucom_softc *ucom)
 520 {
 521         struct umct_softc *sc = ucom->sc_parent;
 522
 523         /* stop interrupt endpoint */
 524         usbd_transfer_stop(sc->sc_xfer[UMCT_INTR_DT_RD]);
 525
 526         /* stop read endpoint */
 527         usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_RD]);
 528 }
 529
 530 static void
 531 umct_start_write(struct ucom_softc *ucom)
 532 {
 533         struct umct_softc *sc = ucom->sc_parent;
 534
 535         usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_WR]);
 536 }
 537
 538 static void
 539 umct_stop_write(struct ucom_softc *ucom)
 540 {
 541         struct umct_softc *sc = ucom->sc_parent;
 542
 543         usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_WR]);
 544 }
 545
 546 static void
 547 umct_read_callback(struct usb_xfer *xfer, usb_error_t error)
 548 {
 549         struct umct_softc *sc = usbd_xfer_softc(xfer);
 550
 551         if (sc->sc_swap_cb)
 552                 umct_intr_callback_sub(xfer, error);
 553         else
 554                 umct_read_callback_sub(xfer, error);
 555 }
 556
 557 static void
 558 umct_intr_callback(struct usb_xfer *xfer, usb_error_t error)
 559 {
 560         struct umct_softc *sc = usbd_xfer_softc(xfer);
 561
 562         if (sc->sc_swap_cb)
 563                 umct_read_callback_sub(xfer, error);
 564         else
 565                 umct_intr_callback_sub(xfer, error);
 566 }
 567
 568 static void
 569 umct_write_callback(struct usb_xfer *xfer, usb_error_t error)
 570 {
 571         struct umct_softc *sc = usbd_xfer_softc(xfer);
 572         struct usb_page_cache *pc;
 573         uint32_t actlen;
 574
 575         switch (USB_GET_STATE(xfer)) {
 576         case USB_ST_SETUP:
 577         case USB_ST_TRANSFERRED:
 578 tr_setup:
 579                 pc = usbd_xfer_get_frame(xfer, 0);
 580                 if (ucom_get_data(&sc->sc_ucom, pc, 0,
 581                     sc->sc_obufsize, &actlen)) {
 582
 583                         usbd_xfer_set_frame_len(xfer, 0, actlen);
 584                         usbd_transfer_submit(xfer);
 585                 }
 586                 return;
 587
 588         default:                        /* Error */
 589                 if (error != USB_ERR_CANCELLED) {
 590                         /* try to clear stall first */
 591                         usbd_xfer_set_stall(xfer);
 592                         goto tr_setup;
 593                 }
 594                 return;
 595         }
 596 }
 597
 598 static void
 599 umct_read_callback_sub(struct usb_xfer *xfer, usb_error_t error)
 600 {
 601         struct umct_softc *sc = usbd_xfer_softc(xfer);
 602         struct usb_page_cache *pc;
 603         int actlen;
 604
 605         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 606
 607         switch (USB_GET_STATE(xfer)) {
 608         case USB_ST_TRANSFERRED:
 609                 pc = usbd_xfer_get_frame(xfer, 0);
 610                 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
 611
 612         case USB_ST_SETUP:
 613 tr_setup:
 614                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 615                 usbd_transfer_submit(xfer);
 616                 return;
 617
 618         default:                        /* Error */
 619                 if (error != USB_ERR_CANCELLED) {
 620                         /* try to clear stall first */
 621                         usbd_xfer_set_stall(xfer);
 622                         goto tr_setup;
 623                 }
 624                 return;
 625         }
 626 }
 627
 628 static void
 629 umct_poll(struct ucom_softc *ucom)
 630 {
 631         struct umct_softc *sc = ucom->sc_parent;
 632         usbd_transfer_poll(sc->sc_xfer, UMCT_N_TRANSFER);
 633 }