1#include <sys/cdefs.h> 2/*- 3 * SPDX-License-Identifier: BSD-2-Clause 4 * 5 * Copyright (c) 2003 Scott Long 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31/* 32 * Driver for the MCT (Magic Control Technology) USB-RS232 Converter. 33 * Based on the superb documentation from the linux mct_u232 driver by 34 * Wolfgang Grandeggar <wolfgang@cec.ch>. 35 * This device smells a lot like the Belkin F5U103, except that it has 36 * suffered some mild brain-damage. This driver is based off of the ubsa.c 37 * driver from Alexander Kabaev <kan@FreeBSD.org>. Merging the two together 38 * might be useful, though the subtle differences might lead to lots of 39 * #ifdef's. 40 */ 41 42/* 43 * NOTE: all function names beginning like "umct_cfg_" can only 44 * be called from within the config thread function ! 45 */ 46 47#include <sys/stdint.h> 48#include <sys/stddef.h> 49#include <sys/param.h> 50#include <sys/queue.h> 51#include <sys/types.h> 52#include <sys/systm.h> 53#include <sys/kernel.h> 54#include <sys/bus.h> 55#include <sys/module.h> 56#include <sys/lock.h> 57#include <sys/mutex.h> 58#include <sys/condvar.h> 59#include <sys/sysctl.h> 60#include <sys/sx.h> 61#include <sys/unistd.h> 62#include <sys/callout.h> 63#include <sys/malloc.h> 64#include <sys/priv.h> 65 66#include <dev/usb/usb.h> 67#include <dev/usb/usbdi.h> 68#include <dev/usb/usbdi_util.h> 69#include "usbdevs.h" 70 71#define USB_DEBUG_VAR usb_debug 72#include <dev/usb/usb_debug.h> 73#include <dev/usb/usb_process.h> 74 75#include <dev/usb/serial/usb_serial.h> 76 77/* The UMCT advertises the standard 8250 UART registers */ 78#define UMCT_GET_MSR 2 /* Get Modem Status Register */ 79#define UMCT_GET_MSR_SIZE 1 80#define UMCT_GET_LCR 6 /* Get Line Control Register */ 81#define UMCT_GET_LCR_SIZE 1 82#define UMCT_SET_BAUD 5 /* Set the Baud Rate Divisor */ 83#define UMCT_SET_BAUD_SIZE 4 84#define UMCT_SET_LCR 7 /* Set Line Control Register */ 85#define UMCT_SET_LCR_SIZE 1 86#define UMCT_SET_MCR 10 /* Set Modem Control Register */ 87#define UMCT_SET_MCR_SIZE 1 88 89#define UMCT_MSR_CTS_CHG 0x01 90#define UMCT_MSR_DSR_CHG 0x02 91#define UMCT_MSR_RI_CHG 0x04 92#define UMCT_MSR_CD_CHG 0x08 93#define UMCT_MSR_CTS 0x10 94#define UMCT_MSR_RTS 0x20 95#define UMCT_MSR_RI 0x40 96#define UMCT_MSR_CD 0x80 97 98#define UMCT_INTR_INTERVAL 100 99#define UMCT_IFACE_INDEX 0 100#define UMCT_CONFIG_INDEX 0 101 102enum { 103 UMCT_BULK_DT_WR, 104 UMCT_BULK_DT_RD, 105 UMCT_INTR_DT_RD, 106 UMCT_N_TRANSFER, 107}; 108 109struct umct_softc { 110 struct ucom_super_softc sc_super_ucom; 111 struct ucom_softc sc_ucom; 112 113 struct usb_device *sc_udev; 114 struct usb_xfer *sc_xfer[UMCT_N_TRANSFER]; 115 struct mtx sc_mtx; 116 117 uint32_t sc_unit; 118 119 uint16_t sc_obufsize; 120 121 uint8_t sc_lsr; 122 uint8_t sc_msr; 123 uint8_t sc_lcr; 124 uint8_t sc_mcr; 125 uint8_t sc_iface_no; 126 uint8_t sc_swap_cb; 127}; 128 129/* prototypes */ 130 131static device_probe_t umct_probe; 132static device_attach_t umct_attach; 133static device_detach_t umct_detach; 134static void umct_free_softc(struct umct_softc *); 135 136static usb_callback_t umct_intr_callback; 137static usb_callback_t umct_intr_callback_sub; 138static usb_callback_t umct_read_callback; 139static usb_callback_t umct_read_callback_sub; 140static usb_callback_t umct_write_callback; 141 142static void umct_cfg_do_request(struct umct_softc *sc, uint8_t request, 143 uint16_t len, uint32_t value); 144static void umct_free(struct ucom_softc *); 145static void umct_cfg_get_status(struct ucom_softc *, uint8_t *, 146 uint8_t *); 147static void umct_cfg_set_break(struct ucom_softc *, uint8_t); 148static void umct_cfg_set_dtr(struct ucom_softc *, uint8_t); 149static void umct_cfg_set_rts(struct ucom_softc *, uint8_t); 150static uint8_t umct_calc_baud(uint32_t); 151static int umct_pre_param(struct ucom_softc *, struct termios *); 152static void umct_cfg_param(struct ucom_softc *, struct termios *); 153static void umct_start_read(struct ucom_softc *); 154static void umct_stop_read(struct ucom_softc *); 155static void umct_start_write(struct ucom_softc *); 156static void umct_stop_write(struct ucom_softc *); 157static void umct_poll(struct ucom_softc *ucom); 158 159static const struct usb_config umct_config[UMCT_N_TRANSFER] = { 160 [UMCT_BULK_DT_WR] = { 161 .type = UE_BULK, 162 .endpoint = UE_ADDR_ANY, 163 .direction = UE_DIR_OUT, 164 .bufsize = 0, /* use wMaxPacketSize */ 165 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 166 .callback = &umct_write_callback, 167 }, 168 169 [UMCT_BULK_DT_RD] = { 170 .type = UE_INTERRUPT, 171 .endpoint = UE_ADDR_ANY, 172 .direction = UE_DIR_IN, 173 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 174 .bufsize = 0, /* use wMaxPacketSize */ 175 .callback = &umct_read_callback, 176 .ep_index = 0, /* first interrupt endpoint */ 177 }, 178 179 [UMCT_INTR_DT_RD] = { 180 .type = UE_INTERRUPT, 181 .endpoint = UE_ADDR_ANY, 182 .direction = UE_DIR_IN, 183 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 184 .bufsize = 0, /* use wMaxPacketSize */ 185 .callback = &umct_intr_callback, 186 .ep_index = 1, /* second interrupt endpoint */ 187 }, 188}; 189 190static const struct ucom_callback umct_callback = { 191 .ucom_cfg_get_status = &umct_cfg_get_status, 192 .ucom_cfg_set_dtr = &umct_cfg_set_dtr, 193 .ucom_cfg_set_rts = &umct_cfg_set_rts, 194 .ucom_cfg_set_break = &umct_cfg_set_break, 195 .ucom_cfg_param = &umct_cfg_param, 196 .ucom_pre_param = &umct_pre_param, 197 .ucom_start_read = &umct_start_read, 198 .ucom_stop_read = &umct_stop_read, 199 .ucom_start_write = &umct_start_write, 200 .ucom_stop_write = &umct_stop_write, 201 .ucom_poll = &umct_poll, 202 .ucom_free = &umct_free, 203}; 204 205static const STRUCT_USB_HOST_ID umct_devs[] = { 206 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232, 0)}, 207 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232, 0)}, 208 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232, 0)}, 209 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109, 0)}, 210 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409, 0)}, 211}; 212 213static device_method_t umct_methods[] = { 214 DEVMETHOD(device_probe, umct_probe), 215 DEVMETHOD(device_attach, umct_attach), 216 DEVMETHOD(device_detach, umct_detach), 217 DEVMETHOD_END 218}; 219 220static driver_t umct_driver = { 221 .name = "umct", 222 .methods = umct_methods, 223 .size = sizeof(struct umct_softc), 224}; 225 226DRIVER_MODULE(umct, uhub, umct_driver, NULL, NULL); 227MODULE_DEPEND(umct, ucom, 1, 1, 1); 228MODULE_DEPEND(umct, usb, 1, 1, 1); 229MODULE_VERSION(umct, 1); 230USB_PNP_HOST_INFO(umct_devs); 231 232static int 233umct_probe(device_t dev) 234{ 235 struct usb_attach_arg *uaa = device_get_ivars(dev); 236 237 if (uaa->usb_mode != USB_MODE_HOST) { 238 return (ENXIO); 239 } 240 if (uaa->info.bConfigIndex != UMCT_CONFIG_INDEX) { 241 return (ENXIO); 242 } 243 if (uaa->info.bIfaceIndex != UMCT_IFACE_INDEX) { 244 return (ENXIO); 245 } 246 return (usbd_lookup_id_by_uaa(umct_devs, sizeof(umct_devs), uaa)); 247} 248 249static int 250umct_attach(device_t dev) 251{ 252 struct usb_attach_arg *uaa = device_get_ivars(dev); 253 struct umct_softc *sc = device_get_softc(dev); 254 int32_t error; 255 uint16_t maxp; 256 uint8_t iface_index; 257 258 sc->sc_udev = uaa->device; 259 sc->sc_unit = device_get_unit(dev); 260 261 device_set_usb_desc(dev); 262 mtx_init(&sc->sc_mtx, "umct", NULL, MTX_DEF); 263 ucom_ref(&sc->sc_super_ucom); 264 265 sc->sc_iface_no = uaa->info.bIfaceNum; 266 267 iface_index = UMCT_IFACE_INDEX; 268 error = usbd_transfer_setup(uaa->device, &iface_index, 269 sc->sc_xfer, umct_config, UMCT_N_TRANSFER, sc, &sc->sc_mtx); 270 271 if (error) { 272 device_printf(dev, "allocating USB " 273 "transfers failed\n"); 274 goto detach; 275 } 276 277 /* 278 * The real bulk-in endpoint is also marked as an interrupt. 279 * The only way to differentiate it from the real interrupt 280 * endpoint is to look at the wMaxPacketSize field. 281 */ 282 maxp = usbd_xfer_max_framelen(sc->sc_xfer[UMCT_BULK_DT_RD]); 283 if (maxp == 0x2) { 284 /* guessed wrong - switch around endpoints */ 285 286 struct usb_xfer *temp = sc->sc_xfer[UMCT_INTR_DT_RD]; 287 288 sc->sc_xfer[UMCT_INTR_DT_RD] = sc->sc_xfer[UMCT_BULK_DT_RD]; 289 sc->sc_xfer[UMCT_BULK_DT_RD] = temp; 290 sc->sc_swap_cb = 1; 291 } 292 293 sc->sc_obufsize = usbd_xfer_max_len(sc->sc_xfer[UMCT_BULK_DT_WR]); 294 295 if (uaa->info.idProduct == USB_PRODUCT_MCT_SITECOM_USB232) { 296 if (sc->sc_obufsize > 16) { 297 sc->sc_obufsize = 16; 298 } 299 } 300 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 301 &umct_callback, &sc->sc_mtx); 302 if (error) { 303 goto detach; 304 } 305 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 306 307 return (0); /* success */ 308 309detach: 310 umct_detach(dev); 311 return (ENXIO); /* failure */ 312} 313 314static int 315umct_detach(device_t dev) 316{ 317 struct umct_softc *sc = device_get_softc(dev); 318 319 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 320 usbd_transfer_unsetup(sc->sc_xfer, UMCT_N_TRANSFER); 321 322 device_claim_softc(dev); 323 324 umct_free_softc(sc); 325 326 return (0); 327} 328 329UCOM_UNLOAD_DRAIN(umct); 330 331static void 332umct_free_softc(struct umct_softc *sc) 333{ 334 if (ucom_unref(&sc->sc_super_ucom)) { 335 mtx_destroy(&sc->sc_mtx); 336 device_free_softc(sc); 337 } 338} 339 340static void 341umct_free(struct ucom_softc *ucom) 342{ 343 umct_free_softc(ucom->sc_parent); 344} 345 346static void 347umct_cfg_do_request(struct umct_softc *sc, uint8_t request, 348 uint16_t len, uint32_t value) 349{ 350 struct usb_device_request req; 351 usb_error_t err; 352 uint8_t temp[4]; 353 354 if (len > 4) 355 len = 4; 356 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 357 req.bRequest = request; 358 USETW(req.wValue, 0); 359 req.wIndex[0] = sc->sc_iface_no; 360 req.wIndex[1] = 0; 361 USETW(req.wLength, len); 362 USETDW(temp, value); 363 364 err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, 365 &req, temp, 0, 1000); 366 if (err) { 367 DPRINTFN(0, "device request failed, err=%s " 368 "(ignored)\n", usbd_errstr(err)); 369 } 370 return; 371} 372 373static void 374umct_intr_callback_sub(struct usb_xfer *xfer, usb_error_t error) 375{ 376 struct umct_softc *sc = usbd_xfer_softc(xfer); 377 struct usb_page_cache *pc; 378 uint8_t buf[2]; 379 int actlen; 380 381 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 382 383 switch (USB_GET_STATE(xfer)) { 384 case USB_ST_TRANSFERRED: 385 if (actlen < 2) { 386 DPRINTF("too short message\n"); 387 goto tr_setup; 388 } 389 pc = usbd_xfer_get_frame(xfer, 0); 390 usbd_copy_out(pc, 0, buf, sizeof(buf)); 391 392 /* 393 * MSR bits need translation from ns16550 to SER_* values. 394 * LSR bits are ns16550 in hardware and ucom. 395 */ 396 sc->sc_msr = 0; 397 if (buf[0] & UMCT_MSR_CTS) 398 sc->sc_msr |= SER_CTS; 399 if (buf[0] & UMCT_MSR_CD) 400 sc->sc_msr |= SER_DCD; 401 if (buf[0] & UMCT_MSR_RI) 402 sc->sc_msr |= SER_RI; 403 if (buf[0] & UMCT_MSR_RTS) 404 sc->sc_msr |= SER_DSR; 405 sc->sc_lsr = buf[1]; 406 407 ucom_status_change(&sc->sc_ucom); 408 /* FALLTHROUGH */ 409 case USB_ST_SETUP: 410tr_setup: 411 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 412 usbd_transfer_submit(xfer); 413 return; 414 415 default: /* Error */ 416 if (error != USB_ERR_CANCELLED) { 417 /* try to clear stall first */ 418 usbd_xfer_set_stall(xfer); 419 goto tr_setup; 420 } 421 return; 422 } 423} 424 425static void 426umct_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 427{ 428 struct umct_softc *sc = ucom->sc_parent; 429 430 *lsr = sc->sc_lsr; 431 *msr = sc->sc_msr; 432} 433 434static void 435umct_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 436{ 437 struct umct_softc *sc = ucom->sc_parent; 438 439 if (onoff) 440 sc->sc_lcr |= 0x40; 441 else 442 sc->sc_lcr &= ~0x40; 443 444 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr); 445} 446 447static void 448umct_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 449{ 450 struct umct_softc *sc = ucom->sc_parent; 451 452 if (onoff) 453 sc->sc_mcr |= 0x01; 454 else 455 sc->sc_mcr &= ~0x01; 456 457 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 458} 459 460static void 461umct_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 462{ 463 struct umct_softc *sc = ucom->sc_parent; 464 465 if (onoff) 466 sc->sc_mcr |= 0x02; 467 else 468 sc->sc_mcr &= ~0x02; 469 470 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 471} 472 473static uint8_t 474umct_calc_baud(uint32_t baud) 475{ 476 switch (baud) { 477 case B300: 478 return (0x1); 479 case B600: 480 return (0x2); 481 case B1200: 482 return (0x3); 483 case B2400: 484 return (0x4); 485 case B4800: 486 return (0x6); 487 case B9600: 488 return (0x8); 489 case B19200: 490 return (0x9); 491 case B38400: 492 return (0xa); 493 case B57600: 494 return (0xb); 495 case 115200: 496 return (0xc); 497 case B0: 498 default: 499 break; 500 } 501 return (0x0); 502} 503 504static int 505umct_pre_param(struct ucom_softc *ucom, struct termios *t) 506{ 507 return (0); /* we accept anything */ 508} 509 510static void 511umct_cfg_param(struct ucom_softc *ucom, struct termios *t) 512{ 513 struct umct_softc *sc = ucom->sc_parent; 514 uint32_t value; 515 516 value = umct_calc_baud(t->c_ospeed); 517 umct_cfg_do_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value); 518 519 value = (sc->sc_lcr & 0x40); 520 521 switch (t->c_cflag & CSIZE) { 522 case CS5: 523 value |= 0x0; 524 break; 525 case CS6: 526 value |= 0x1; 527 break; 528 case CS7: 529 value |= 0x2; 530 break; 531 default: 532 case CS8: 533 value |= 0x3; 534 break; 535 } 536 537 value |= (t->c_cflag & CSTOPB) ? 0x4 : 0; 538 if (t->c_cflag & PARENB) { 539 value |= 0x8; 540 value |= (t->c_cflag & PARODD) ? 0x0 : 0x10; 541 } 542 /* 543 * XXX There doesn't seem to be a way to tell the device 544 * to use flow control. 545 */ 546 547 sc->sc_lcr = value; 548 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value); 549} 550 551static void 552umct_start_read(struct ucom_softc *ucom) 553{ 554 struct umct_softc *sc = ucom->sc_parent; 555 556 /* start interrupt endpoint */ 557 usbd_transfer_start(sc->sc_xfer[UMCT_INTR_DT_RD]); 558 559 /* start read endpoint */ 560 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_RD]); 561} 562 563static void 564umct_stop_read(struct ucom_softc *ucom) 565{ 566 struct umct_softc *sc = ucom->sc_parent; 567 568 /* stop interrupt endpoint */ 569 usbd_transfer_stop(sc->sc_xfer[UMCT_INTR_DT_RD]); 570 571 /* stop read endpoint */ 572 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_RD]); 573} 574 575static void 576umct_start_write(struct ucom_softc *ucom) 577{ 578 struct umct_softc *sc = ucom->sc_parent; 579 580 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_WR]); 581} 582 583static void 584umct_stop_write(struct ucom_softc *ucom) 585{ 586 struct umct_softc *sc = ucom->sc_parent; 587 588 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_WR]); 589} 590 591static void 592umct_read_callback(struct usb_xfer *xfer, usb_error_t error) 593{ 594 struct umct_softc *sc = usbd_xfer_softc(xfer); 595 596 if (sc->sc_swap_cb) 597 umct_intr_callback_sub(xfer, error); 598 else 599 umct_read_callback_sub(xfer, error); 600} 601 602static void 603umct_intr_callback(struct usb_xfer *xfer, usb_error_t error) 604{ 605 struct umct_softc *sc = usbd_xfer_softc(xfer); 606 607 if (sc->sc_swap_cb) 608 umct_read_callback_sub(xfer, error); 609 else 610 umct_intr_callback_sub(xfer, error); 611} 612 613static void 614umct_write_callback(struct usb_xfer *xfer, usb_error_t error) 615{ 616 struct umct_softc *sc = usbd_xfer_softc(xfer); 617 struct usb_page_cache *pc; 618 uint32_t actlen; 619 620 switch (USB_GET_STATE(xfer)) { 621 case USB_ST_SETUP: 622 case USB_ST_TRANSFERRED: 623tr_setup: 624 pc = usbd_xfer_get_frame(xfer, 0); 625 if (ucom_get_data(&sc->sc_ucom, pc, 0, 626 sc->sc_obufsize, &actlen)) { 627 usbd_xfer_set_frame_len(xfer, 0, actlen); 628 usbd_transfer_submit(xfer); 629 } 630 return; 631 632 default: /* Error */ 633 if (error != USB_ERR_CANCELLED) { 634 /* try to clear stall first */ 635 usbd_xfer_set_stall(xfer); 636 goto tr_setup; 637 } 638 return; 639 } 640} 641 642static void 643umct_read_callback_sub(struct usb_xfer *xfer, usb_error_t error) 644{ 645 struct umct_softc *sc = usbd_xfer_softc(xfer); 646 struct usb_page_cache *pc; 647 int actlen; 648 649 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 650 651 switch (USB_GET_STATE(xfer)) { 652 case USB_ST_TRANSFERRED: 653 pc = usbd_xfer_get_frame(xfer, 0); 654 ucom_put_data(&sc->sc_ucom, pc, 0, actlen); 655 656 case USB_ST_SETUP: 657tr_setup: 658 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 659 usbd_transfer_submit(xfer); 660 return; 661 662 default: /* Error */ 663 if (error != USB_ERR_CANCELLED) { 664 /* try to clear stall first */ 665 usbd_xfer_set_stall(xfer); 666 goto tr_setup; 667 } 668 return; 669 } 670} 671 672static void 673umct_poll(struct ucom_softc *ucom) 674{ 675 struct umct_softc *sc = ucom->sc_parent; 676 usbd_transfer_poll(sc->sc_xfer, UMCT_N_TRANSFER); 677} 678