umct.c revision 331722
1#include <sys/cdefs.h> 2__FBSDID("$FreeBSD: stable/11/sys/dev/usb/serial/umct.c 331722 2018-03-29 02:50:57Z eadler $"); 3 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] = { 160 161 [UMCT_BULK_DT_WR] = { 162 .type = UE_BULK, 163 .endpoint = UE_ADDR_ANY, 164 .direction = UE_DIR_OUT, 165 .bufsize = 0, /* use wMaxPacketSize */ 166 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 167 .callback = &umct_write_callback, 168 }, 169 170 [UMCT_BULK_DT_RD] = { 171 .type = UE_INTERRUPT, 172 .endpoint = UE_ADDR_ANY, 173 .direction = UE_DIR_IN, 174 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 175 .bufsize = 0, /* use wMaxPacketSize */ 176 .callback = &umct_read_callback, 177 .ep_index = 0, /* first interrupt endpoint */ 178 }, 179 180 [UMCT_INTR_DT_RD] = { 181 .type = UE_INTERRUPT, 182 .endpoint = UE_ADDR_ANY, 183 .direction = UE_DIR_IN, 184 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 185 .bufsize = 0, /* use wMaxPacketSize */ 186 .callback = &umct_intr_callback, 187 .ep_index = 1, /* second interrupt endpoint */ 188 }, 189}; 190 191static const struct ucom_callback umct_callback = { 192 .ucom_cfg_get_status = &umct_cfg_get_status, 193 .ucom_cfg_set_dtr = &umct_cfg_set_dtr, 194 .ucom_cfg_set_rts = &umct_cfg_set_rts, 195 .ucom_cfg_set_break = &umct_cfg_set_break, 196 .ucom_cfg_param = &umct_cfg_param, 197 .ucom_pre_param = &umct_pre_param, 198 .ucom_start_read = &umct_start_read, 199 .ucom_stop_read = &umct_stop_read, 200 .ucom_start_write = &umct_start_write, 201 .ucom_stop_write = &umct_stop_write, 202 .ucom_poll = &umct_poll, 203 .ucom_free = &umct_free, 204}; 205 206static const STRUCT_USB_HOST_ID umct_devs[] = { 207 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232, 0)}, 208 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232, 0)}, 209 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232, 0)}, 210 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109, 0)}, 211 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409, 0)}, 212}; 213 214static device_method_t umct_methods[] = { 215 DEVMETHOD(device_probe, umct_probe), 216 DEVMETHOD(device_attach, umct_attach), 217 DEVMETHOD(device_detach, umct_detach), 218 DEVMETHOD_END 219}; 220 221static devclass_t umct_devclass; 222 223static driver_t umct_driver = { 224 .name = "umct", 225 .methods = umct_methods, 226 .size = sizeof(struct umct_softc), 227}; 228 229DRIVER_MODULE(umct, uhub, umct_driver, umct_devclass, NULL, 0); 230MODULE_DEPEND(umct, ucom, 1, 1, 1); 231MODULE_DEPEND(umct, usb, 1, 1, 1); 232MODULE_VERSION(umct, 1); 233USB_PNP_HOST_INFO(umct_devs); 234 235static int 236umct_probe(device_t dev) 237{ 238 struct usb_attach_arg *uaa = device_get_ivars(dev); 239 240 if (uaa->usb_mode != USB_MODE_HOST) { 241 return (ENXIO); 242 } 243 if (uaa->info.bConfigIndex != UMCT_CONFIG_INDEX) { 244 return (ENXIO); 245 } 246 if (uaa->info.bIfaceIndex != UMCT_IFACE_INDEX) { 247 return (ENXIO); 248 } 249 return (usbd_lookup_id_by_uaa(umct_devs, sizeof(umct_devs), uaa)); 250} 251 252static int 253umct_attach(device_t dev) 254{ 255 struct usb_attach_arg *uaa = device_get_ivars(dev); 256 struct umct_softc *sc = device_get_softc(dev); 257 int32_t error; 258 uint16_t maxp; 259 uint8_t iface_index; 260 261 sc->sc_udev = uaa->device; 262 sc->sc_unit = device_get_unit(dev); 263 264 device_set_usb_desc(dev); 265 mtx_init(&sc->sc_mtx, "umct", NULL, MTX_DEF); 266 ucom_ref(&sc->sc_super_ucom); 267 268 sc->sc_iface_no = uaa->info.bIfaceNum; 269 270 iface_index = UMCT_IFACE_INDEX; 271 error = usbd_transfer_setup(uaa->device, &iface_index, 272 sc->sc_xfer, umct_config, UMCT_N_TRANSFER, sc, &sc->sc_mtx); 273 274 if (error) { 275 device_printf(dev, "allocating USB " 276 "transfers failed\n"); 277 goto detach; 278 } 279 280 /* 281 * The real bulk-in endpoint is also marked as an interrupt. 282 * The only way to differentiate it from the real interrupt 283 * endpoint is to look at the wMaxPacketSize field. 284 */ 285 maxp = usbd_xfer_max_framelen(sc->sc_xfer[UMCT_BULK_DT_RD]); 286 if (maxp == 0x2) { 287 288 /* guessed wrong - switch around endpoints */ 289 290 struct usb_xfer *temp = sc->sc_xfer[UMCT_INTR_DT_RD]; 291 292 sc->sc_xfer[UMCT_INTR_DT_RD] = sc->sc_xfer[UMCT_BULK_DT_RD]; 293 sc->sc_xfer[UMCT_BULK_DT_RD] = temp; 294 sc->sc_swap_cb = 1; 295 } 296 297 sc->sc_obufsize = usbd_xfer_max_len(sc->sc_xfer[UMCT_BULK_DT_WR]); 298 299 if (uaa->info.idProduct == USB_PRODUCT_MCT_SITECOM_USB232) { 300 if (sc->sc_obufsize > 16) { 301 sc->sc_obufsize = 16; 302 } 303 } 304 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 305 &umct_callback, &sc->sc_mtx); 306 if (error) { 307 goto detach; 308 } 309 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 310 311 return (0); /* success */ 312 313detach: 314 umct_detach(dev); 315 return (ENXIO); /* failure */ 316} 317 318static int 319umct_detach(device_t dev) 320{ 321 struct umct_softc *sc = device_get_softc(dev); 322 323 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 324 usbd_transfer_unsetup(sc->sc_xfer, UMCT_N_TRANSFER); 325 326 device_claim_softc(dev); 327 328 umct_free_softc(sc); 329 330 return (0); 331} 332 333UCOM_UNLOAD_DRAIN(umct); 334 335static void 336umct_free_softc(struct umct_softc *sc) 337{ 338 if (ucom_unref(&sc->sc_super_ucom)) { 339 mtx_destroy(&sc->sc_mtx); 340 device_free_softc(sc); 341 } 342} 343 344static void 345umct_free(struct ucom_softc *ucom) 346{ 347 umct_free_softc(ucom->sc_parent); 348} 349 350static void 351umct_cfg_do_request(struct umct_softc *sc, uint8_t request, 352 uint16_t len, uint32_t value) 353{ 354 struct usb_device_request req; 355 usb_error_t err; 356 uint8_t temp[4]; 357 358 if (len > 4) 359 len = 4; 360 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 361 req.bRequest = request; 362 USETW(req.wValue, 0); 363 req.wIndex[0] = sc->sc_iface_no; 364 req.wIndex[1] = 0; 365 USETW(req.wLength, len); 366 USETDW(temp, value); 367 368 err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, 369 &req, temp, 0, 1000); 370 if (err) { 371 DPRINTFN(0, "device request failed, err=%s " 372 "(ignored)\n", usbd_errstr(err)); 373 } 374 return; 375} 376 377static void 378umct_intr_callback_sub(struct usb_xfer *xfer, usb_error_t error) 379{ 380 struct umct_softc *sc = usbd_xfer_softc(xfer); 381 struct usb_page_cache *pc; 382 uint8_t buf[2]; 383 int actlen; 384 385 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 386 387 switch (USB_GET_STATE(xfer)) { 388 case USB_ST_TRANSFERRED: 389 if (actlen < 2) { 390 DPRINTF("too short message\n"); 391 goto tr_setup; 392 } 393 pc = usbd_xfer_get_frame(xfer, 0); 394 usbd_copy_out(pc, 0, buf, sizeof(buf)); 395 396 /* 397 * MSR bits need translation from ns16550 to SER_* values. 398 * LSR bits are ns16550 in hardware and ucom. 399 */ 400 sc->sc_msr = 0; 401 if (buf[0] & UMCT_MSR_CTS) 402 sc->sc_msr |= SER_CTS; 403 if (buf[0] & UMCT_MSR_CD) 404 sc->sc_msr |= SER_DCD; 405 if (buf[0] & UMCT_MSR_RI) 406 sc->sc_msr |= SER_RI; 407 if (buf[0] & UMCT_MSR_RTS) 408 sc->sc_msr |= SER_DSR; 409 sc->sc_lsr = buf[1]; 410 411 ucom_status_change(&sc->sc_ucom); 412 /* FALLTHROUGH */ 413 case USB_ST_SETUP: 414tr_setup: 415 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 416 usbd_transfer_submit(xfer); 417 return; 418 419 default: /* Error */ 420 if (error != USB_ERR_CANCELLED) { 421 /* try to clear stall first */ 422 usbd_xfer_set_stall(xfer); 423 goto tr_setup; 424 } 425 return; 426 } 427} 428 429static void 430umct_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 431{ 432 struct umct_softc *sc = ucom->sc_parent; 433 434 *lsr = sc->sc_lsr; 435 *msr = sc->sc_msr; 436} 437 438static void 439umct_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 440{ 441 struct umct_softc *sc = ucom->sc_parent; 442 443 if (onoff) 444 sc->sc_lcr |= 0x40; 445 else 446 sc->sc_lcr &= ~0x40; 447 448 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr); 449} 450 451static void 452umct_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 453{ 454 struct umct_softc *sc = ucom->sc_parent; 455 456 if (onoff) 457 sc->sc_mcr |= 0x01; 458 else 459 sc->sc_mcr &= ~0x01; 460 461 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 462} 463 464static void 465umct_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 466{ 467 struct umct_softc *sc = ucom->sc_parent; 468 469 if (onoff) 470 sc->sc_mcr |= 0x02; 471 else 472 sc->sc_mcr &= ~0x02; 473 474 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 475} 476 477static uint8_t 478umct_calc_baud(uint32_t baud) 479{ 480 switch (baud) { 481 case B300:return (0x1); 482 case B600: 483 return (0x2); 484 case B1200: 485 return (0x3); 486 case B2400: 487 return (0x4); 488 case B4800: 489 return (0x6); 490 case B9600: 491 return (0x8); 492 case B19200: 493 return (0x9); 494 case B38400: 495 return (0xa); 496 case B57600: 497 return (0xb); 498 case 115200: 499 return (0xc); 500 case B0: 501 default: 502 break; 503 } 504 return (0x0); 505} 506 507static int 508umct_pre_param(struct ucom_softc *ucom, struct termios *t) 509{ 510 return (0); /* we accept anything */ 511} 512 513static void 514umct_cfg_param(struct ucom_softc *ucom, struct termios *t) 515{ 516 struct umct_softc *sc = ucom->sc_parent; 517 uint32_t value; 518 519 value = umct_calc_baud(t->c_ospeed); 520 umct_cfg_do_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value); 521 522 value = (sc->sc_lcr & 0x40); 523 524 switch (t->c_cflag & CSIZE) { 525 case CS5: 526 value |= 0x0; 527 break; 528 case CS6: 529 value |= 0x1; 530 break; 531 case CS7: 532 value |= 0x2; 533 break; 534 default: 535 case CS8: 536 value |= 0x3; 537 break; 538 } 539 540 value |= (t->c_cflag & CSTOPB) ? 0x4 : 0; 541 if (t->c_cflag & PARENB) { 542 value |= 0x8; 543 value |= (t->c_cflag & PARODD) ? 0x0 : 0x10; 544 } 545 /* 546 * XXX There doesn't seem to be a way to tell the device 547 * to use flow control. 548 */ 549 550 sc->sc_lcr = value; 551 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value); 552} 553 554static void 555umct_start_read(struct ucom_softc *ucom) 556{ 557 struct umct_softc *sc = ucom->sc_parent; 558 559 /* start interrupt endpoint */ 560 usbd_transfer_start(sc->sc_xfer[UMCT_INTR_DT_RD]); 561 562 /* start read endpoint */ 563 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_RD]); 564} 565 566static void 567umct_stop_read(struct ucom_softc *ucom) 568{ 569 struct umct_softc *sc = ucom->sc_parent; 570 571 /* stop interrupt endpoint */ 572 usbd_transfer_stop(sc->sc_xfer[UMCT_INTR_DT_RD]); 573 574 /* stop read endpoint */ 575 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_RD]); 576} 577 578static void 579umct_start_write(struct ucom_softc *ucom) 580{ 581 struct umct_softc *sc = ucom->sc_parent; 582 583 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_WR]); 584} 585 586static void 587umct_stop_write(struct ucom_softc *ucom) 588{ 589 struct umct_softc *sc = ucom->sc_parent; 590 591 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_WR]); 592} 593 594static void 595umct_read_callback(struct usb_xfer *xfer, usb_error_t error) 596{ 597 struct umct_softc *sc = usbd_xfer_softc(xfer); 598 599 if (sc->sc_swap_cb) 600 umct_intr_callback_sub(xfer, error); 601 else 602 umct_read_callback_sub(xfer, error); 603} 604 605static void 606umct_intr_callback(struct usb_xfer *xfer, usb_error_t error) 607{ 608 struct umct_softc *sc = usbd_xfer_softc(xfer); 609 610 if (sc->sc_swap_cb) 611 umct_read_callback_sub(xfer, error); 612 else 613 umct_intr_callback_sub(xfer, error); 614} 615 616static void 617umct_write_callback(struct usb_xfer *xfer, usb_error_t error) 618{ 619 struct umct_softc *sc = usbd_xfer_softc(xfer); 620 struct usb_page_cache *pc; 621 uint32_t actlen; 622 623 switch (USB_GET_STATE(xfer)) { 624 case USB_ST_SETUP: 625 case USB_ST_TRANSFERRED: 626tr_setup: 627 pc = usbd_xfer_get_frame(xfer, 0); 628 if (ucom_get_data(&sc->sc_ucom, pc, 0, 629 sc->sc_obufsize, &actlen)) { 630 631 usbd_xfer_set_frame_len(xfer, 0, actlen); 632 usbd_transfer_submit(xfer); 633 } 634 return; 635 636 default: /* Error */ 637 if (error != USB_ERR_CANCELLED) { 638 /* try to clear stall first */ 639 usbd_xfer_set_stall(xfer); 640 goto tr_setup; 641 } 642 return; 643 } 644} 645 646static void 647umct_read_callback_sub(struct usb_xfer *xfer, usb_error_t error) 648{ 649 struct umct_softc *sc = usbd_xfer_softc(xfer); 650 struct usb_page_cache *pc; 651 int actlen; 652 653 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 654 655 switch (USB_GET_STATE(xfer)) { 656 case USB_ST_TRANSFERRED: 657 pc = usbd_xfer_get_frame(xfer, 0); 658 ucom_put_data(&sc->sc_ucom, pc, 0, actlen); 659 660 case USB_ST_SETUP: 661tr_setup: 662 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 663 usbd_transfer_submit(xfer); 664 return; 665 666 default: /* Error */ 667 if (error != USB_ERR_CANCELLED) { 668 /* try to clear stall first */ 669 usbd_xfer_set_stall(xfer); 670 goto tr_setup; 671 } 672 return; 673 } 674} 675 676static void 677umct_poll(struct ucom_softc *ucom) 678{ 679 struct umct_softc *sc = ucom->sc_parent; 680 usbd_transfer_poll(sc->sc_xfer, UMCT_N_TRANSFER); 681} 682