1 #include <sys/cdefs.h> 2 __FBSDID("$FreeBSD$"); 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 6 * 7 * Copyright (c) 2003 Scott Long 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 /* 34 * Driver for the MCT (Magic Control Technology) USB-RS232 Converter. 35 * Based on the superb documentation from the linux mct_u232 driver by 36 * Wolfgang Grandeggar <wolfgang@cec.ch>. 37 * This device smells a lot like the Belkin F5U103, except that it has 38 * suffered some mild brain-damage. This driver is based off of the ubsa.c 39 * driver from Alexander Kabaev <kan@FreeBSD.org>. Merging the two together 40 * might be useful, though the subtle differences might lead to lots of 41 * #ifdef's. 42 */ 43 44 /* 45 * NOTE: all function names beginning like "umct_cfg_" can only 46 * be called from within the config thread function ! 47 */ 48 49 #include <sys/stdint.h> 50 #include <sys/stddef.h> 51 #include <sys/param.h> 52 #include <sys/queue.h> 53 #include <sys/types.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/bus.h> 57 #include <sys/module.h> 58 #include <sys/lock.h> 59 #include <sys/mutex.h> 60 #include <sys/condvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/sx.h> 63 #include <sys/unistd.h> 64 #include <sys/callout.h> 65 #include <sys/malloc.h> 66 #include <sys/priv.h> 67 68 #include <dev/usb/usb.h> 69 #include <dev/usb/usbdi.h> 70 #include <dev/usb/usbdi_util.h> 71 #include "usbdevs.h" 72 73 #define USB_DEBUG_VAR usb_debug 74 #include <dev/usb/usb_debug.h> 75 #include <dev/usb/usb_process.h> 76 77 #include <dev/usb/serial/usb_serial.h> 78 79 /* The UMCT advertises the standard 8250 UART registers */ 80 #define UMCT_GET_MSR 2 /* Get Modem Status Register */ 81 #define UMCT_GET_MSR_SIZE 1 82 #define UMCT_GET_LCR 6 /* Get Line Control Register */ 83 #define UMCT_GET_LCR_SIZE 1 84 #define UMCT_SET_BAUD 5 /* Set the Baud Rate Divisor */ 85 #define UMCT_SET_BAUD_SIZE 4 86 #define UMCT_SET_LCR 7 /* Set Line Control Register */ 87 #define UMCT_SET_LCR_SIZE 1 88 #define UMCT_SET_MCR 10 /* Set Modem Control Register */ 89 #define UMCT_SET_MCR_SIZE 1 90 91 #define UMCT_MSR_CTS_CHG 0x01 92 #define UMCT_MSR_DSR_CHG 0x02 93 #define UMCT_MSR_RI_CHG 0x04 94 #define UMCT_MSR_CD_CHG 0x08 95 #define UMCT_MSR_CTS 0x10 96 #define UMCT_MSR_RTS 0x20 97 #define UMCT_MSR_RI 0x40 98 #define UMCT_MSR_CD 0x80 99 100 #define UMCT_INTR_INTERVAL 100 101 #define UMCT_IFACE_INDEX 0 102 #define UMCT_CONFIG_INDEX 0 103 104 enum { 105 UMCT_BULK_DT_WR, 106 UMCT_BULK_DT_RD, 107 UMCT_INTR_DT_RD, 108 UMCT_N_TRANSFER, 109 }; 110 111 struct umct_softc { 112 struct ucom_super_softc sc_super_ucom; 113 struct ucom_softc sc_ucom; 114 115 struct usb_device *sc_udev; 116 struct usb_xfer *sc_xfer[UMCT_N_TRANSFER]; 117 struct mtx sc_mtx; 118 119 uint32_t sc_unit; 120 121 uint16_t sc_obufsize; 122 123 uint8_t sc_lsr; 124 uint8_t sc_msr; 125 uint8_t sc_lcr; 126 uint8_t sc_mcr; 127 uint8_t sc_iface_no; 128 uint8_t sc_swap_cb; 129 }; 130 131 /* prototypes */ 132 133 static device_probe_t umct_probe; 134 static device_attach_t umct_attach; 135 static device_detach_t umct_detach; 136 static void umct_free_softc(struct umct_softc *); 137 138 static usb_callback_t umct_intr_callback; 139 static usb_callback_t umct_intr_callback_sub; 140 static usb_callback_t umct_read_callback; 141 static usb_callback_t umct_read_callback_sub; 142 static usb_callback_t umct_write_callback; 143 144 static void umct_cfg_do_request(struct umct_softc *sc, uint8_t request, 145 uint16_t len, uint32_t value); 146 static void umct_free(struct ucom_softc *); 147 static void umct_cfg_get_status(struct ucom_softc *, uint8_t *, 148 uint8_t *); 149 static void umct_cfg_set_break(struct ucom_softc *, uint8_t); 150 static void umct_cfg_set_dtr(struct ucom_softc *, uint8_t); 151 static void umct_cfg_set_rts(struct ucom_softc *, uint8_t); 152 static uint8_t umct_calc_baud(uint32_t); 153 static int umct_pre_param(struct ucom_softc *, struct termios *); 154 static void umct_cfg_param(struct ucom_softc *, struct termios *); 155 static void umct_start_read(struct ucom_softc *); 156 static void umct_stop_read(struct ucom_softc *); 157 static void umct_start_write(struct ucom_softc *); 158 static void umct_stop_write(struct ucom_softc *); 159 static void umct_poll(struct ucom_softc *ucom); 160 161 static const struct usb_config umct_config[UMCT_N_TRANSFER] = { 162 163 [UMCT_BULK_DT_WR] = { 164 .type = UE_BULK, 165 .endpoint = UE_ADDR_ANY, 166 .direction = UE_DIR_OUT, 167 .bufsize = 0, /* use wMaxPacketSize */ 168 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 169 .callback = &umct_write_callback, 170 }, 171 172 [UMCT_BULK_DT_RD] = { 173 .type = UE_INTERRUPT, 174 .endpoint = UE_ADDR_ANY, 175 .direction = UE_DIR_IN, 176 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 177 .bufsize = 0, /* use wMaxPacketSize */ 178 .callback = &umct_read_callback, 179 .ep_index = 0, /* first interrupt endpoint */ 180 }, 181 182 [UMCT_INTR_DT_RD] = { 183 .type = UE_INTERRUPT, 184 .endpoint = UE_ADDR_ANY, 185 .direction = UE_DIR_IN, 186 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 187 .bufsize = 0, /* use wMaxPacketSize */ 188 .callback = &umct_intr_callback, 189 .ep_index = 1, /* second interrupt endpoint */ 190 }, 191 }; 192 193 static const struct ucom_callback umct_callback = { 194 .ucom_cfg_get_status = &umct_cfg_get_status, 195 .ucom_cfg_set_dtr = &umct_cfg_set_dtr, 196 .ucom_cfg_set_rts = &umct_cfg_set_rts, 197 .ucom_cfg_set_break = &umct_cfg_set_break, 198 .ucom_cfg_param = &umct_cfg_param, 199 .ucom_pre_param = &umct_pre_param, 200 .ucom_start_read = &umct_start_read, 201 .ucom_stop_read = &umct_stop_read, 202 .ucom_start_write = &umct_start_write, 203 .ucom_stop_write = &umct_stop_write, 204 .ucom_poll = &umct_poll, 205 .ucom_free = &umct_free, 206 }; 207 208 static const STRUCT_USB_HOST_ID umct_devs[] = { 209 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232, 0)}, 210 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232, 0)}, 211 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232, 0)}, 212 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109, 0)}, 213 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409, 0)}, 214 }; 215 216 static device_method_t umct_methods[] = { 217 DEVMETHOD(device_probe, umct_probe), 218 DEVMETHOD(device_attach, umct_attach), 219 DEVMETHOD(device_detach, umct_detach), 220 DEVMETHOD_END 221 }; 222 223 static devclass_t umct_devclass; 224 225 static driver_t umct_driver = { 226 .name = "umct", 227 .methods = umct_methods, 228 .size = sizeof(struct umct_softc), 229 }; 230 231 DRIVER_MODULE(umct, uhub, umct_driver, umct_devclass, NULL, 0); 232 MODULE_DEPEND(umct, ucom, 1, 1, 1); 233 MODULE_DEPEND(umct, usb, 1, 1, 1); 234 MODULE_VERSION(umct, 1); 235 USB_PNP_HOST_INFO(umct_devs); 236 237 static int 238 umct_probe(device_t dev) 239 { 240 struct usb_attach_arg *uaa = device_get_ivars(dev); 241 242 if (uaa->usb_mode != USB_MODE_HOST) { 243 return (ENXIO); 244 } 245 if (uaa->info.bConfigIndex != UMCT_CONFIG_INDEX) { 246 return (ENXIO); 247 } 248 if (uaa->info.bIfaceIndex != UMCT_IFACE_INDEX) { 249 return (ENXIO); 250 } 251 return (usbd_lookup_id_by_uaa(umct_devs, sizeof(umct_devs), uaa)); 252 } 253 254 static int 255 umct_attach(device_t dev) 256 { 257 struct usb_attach_arg *uaa = device_get_ivars(dev); 258 struct umct_softc *sc = device_get_softc(dev); 259 int32_t error; 260 uint16_t maxp; 261 uint8_t iface_index; 262 263 sc->sc_udev = uaa->device; 264 sc->sc_unit = device_get_unit(dev); 265 266 device_set_usb_desc(dev); 267 mtx_init(&sc->sc_mtx, "umct", NULL, MTX_DEF); 268 ucom_ref(&sc->sc_super_ucom); 269 270 sc->sc_iface_no = uaa->info.bIfaceNum; 271 272 iface_index = UMCT_IFACE_INDEX; 273 error = usbd_transfer_setup(uaa->device, &iface_index, 274 sc->sc_xfer, umct_config, UMCT_N_TRANSFER, sc, &sc->sc_mtx); 275 276 if (error) { 277 device_printf(dev, "allocating USB " 278 "transfers failed\n"); 279 goto detach; 280 } 281 282 /* 283 * The real bulk-in endpoint is also marked as an interrupt. 284 * The only way to differentiate it from the real interrupt 285 * endpoint is to look at the wMaxPacketSize field. 286 */ 287 maxp = usbd_xfer_max_framelen(sc->sc_xfer[UMCT_BULK_DT_RD]); 288 if (maxp == 0x2) { 289 290 /* guessed wrong - switch around endpoints */ 291 292 struct usb_xfer *temp = sc->sc_xfer[UMCT_INTR_DT_RD]; 293 294 sc->sc_xfer[UMCT_INTR_DT_RD] = sc->sc_xfer[UMCT_BULK_DT_RD]; 295 sc->sc_xfer[UMCT_BULK_DT_RD] = temp; 296 sc->sc_swap_cb = 1; 297 } 298 299 sc->sc_obufsize = usbd_xfer_max_len(sc->sc_xfer[UMCT_BULK_DT_WR]); 300 301 if (uaa->info.idProduct == USB_PRODUCT_MCT_SITECOM_USB232) { 302 if (sc->sc_obufsize > 16) { 303 sc->sc_obufsize = 16; 304 } 305 } 306 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 307 &umct_callback, &sc->sc_mtx); 308 if (error) { 309 goto detach; 310 } 311 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 312 313 return (0); /* success */ 314 315 detach: 316 umct_detach(dev); 317 return (ENXIO); /* failure */ 318 } 319 320 static int 321 umct_detach(device_t dev) 322 { 323 struct umct_softc *sc = device_get_softc(dev); 324 325 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 326 usbd_transfer_unsetup(sc->sc_xfer, UMCT_N_TRANSFER); 327 328 device_claim_softc(dev); 329 330 umct_free_softc(sc); 331 332 return (0); 333 } 334 335 UCOM_UNLOAD_DRAIN(umct); 336 337 static void 338 umct_free_softc(struct umct_softc *sc) 339 { 340 if (ucom_unref(&sc->sc_super_ucom)) { 341 mtx_destroy(&sc->sc_mtx); 342 device_free_softc(sc); 343 } 344 } 345 346 static void 347 umct_free(struct ucom_softc *ucom) 348 { 349 umct_free_softc(ucom->sc_parent); 350 } 351 352 static void 353 umct_cfg_do_request(struct umct_softc *sc, uint8_t request, 354 uint16_t len, uint32_t value) 355 { 356 struct usb_device_request req; 357 usb_error_t err; 358 uint8_t temp[4]; 359 360 if (len > 4) 361 len = 4; 362 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 363 req.bRequest = request; 364 USETW(req.wValue, 0); 365 req.wIndex[0] = sc->sc_iface_no; 366 req.wIndex[1] = 0; 367 USETW(req.wLength, len); 368 USETDW(temp, value); 369 370 err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, 371 &req, temp, 0, 1000); 372 if (err) { 373 DPRINTFN(0, "device request failed, err=%s " 374 "(ignored)\n", usbd_errstr(err)); 375 } 376 return; 377 } 378 379 static void 380 umct_intr_callback_sub(struct usb_xfer *xfer, usb_error_t error) 381 { 382 struct umct_softc *sc = usbd_xfer_softc(xfer); 383 struct usb_page_cache *pc; 384 uint8_t buf[2]; 385 int actlen; 386 387 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 388 389 switch (USB_GET_STATE(xfer)) { 390 case USB_ST_TRANSFERRED: 391 if (actlen < 2) { 392 DPRINTF("too short message\n"); 393 goto tr_setup; 394 } 395 pc = usbd_xfer_get_frame(xfer, 0); 396 usbd_copy_out(pc, 0, buf, sizeof(buf)); 397 398 /* 399 * MSR bits need translation from ns16550 to SER_* values. 400 * LSR bits are ns16550 in hardware and ucom. 401 */ 402 sc->sc_msr = 0; 403 if (buf[0] & UMCT_MSR_CTS) 404 sc->sc_msr |= SER_CTS; 405 if (buf[0] & UMCT_MSR_CD) 406 sc->sc_msr |= SER_DCD; 407 if (buf[0] & UMCT_MSR_RI) 408 sc->sc_msr |= SER_RI; 409 if (buf[0] & UMCT_MSR_RTS) 410 sc->sc_msr |= SER_DSR; 411 sc->sc_lsr = buf[1]; 412 413 ucom_status_change(&sc->sc_ucom); 414 /* FALLTHROUGH */ 415 case USB_ST_SETUP: 416 tr_setup: 417 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 418 usbd_transfer_submit(xfer); 419 return; 420 421 default: /* Error */ 422 if (error != USB_ERR_CANCELLED) { 423 /* try to clear stall first */ 424 usbd_xfer_set_stall(xfer); 425 goto tr_setup; 426 } 427 return; 428 } 429 } 430 431 static void 432 umct_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 433 { 434 struct umct_softc *sc = ucom->sc_parent; 435 436 *lsr = sc->sc_lsr; 437 *msr = sc->sc_msr; 438 } 439 440 static void 441 umct_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 442 { 443 struct umct_softc *sc = ucom->sc_parent; 444 445 if (onoff) 446 sc->sc_lcr |= 0x40; 447 else 448 sc->sc_lcr &= ~0x40; 449 450 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr); 451 } 452 453 static void 454 umct_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 455 { 456 struct umct_softc *sc = ucom->sc_parent; 457 458 if (onoff) 459 sc->sc_mcr |= 0x01; 460 else 461 sc->sc_mcr &= ~0x01; 462 463 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 464 } 465 466 static void 467 umct_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 468 { 469 struct umct_softc *sc = ucom->sc_parent; 470 471 if (onoff) 472 sc->sc_mcr |= 0x02; 473 else 474 sc->sc_mcr &= ~0x02; 475 476 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr); 477 } 478 479 static uint8_t 480 umct_calc_baud(uint32_t baud) 481 { 482 switch (baud) { 483 case B300:return (0x1); 484 case B600: 485 return (0x2); 486 case B1200: 487 return (0x3); 488 case B2400: 489 return (0x4); 490 case B4800: 491 return (0x6); 492 case B9600: 493 return (0x8); 494 case B19200: 495 return (0x9); 496 case B38400: 497 return (0xa); 498 case B57600: 499 return (0xb); 500 case 115200: 501 return (0xc); 502 case B0: 503 default: 504 break; 505 } 506 return (0x0); 507 } 508 509 static int 510 umct_pre_param(struct ucom_softc *ucom, struct termios *t) 511 { 512 return (0); /* we accept anything */ 513 } 514 515 static void 516 umct_cfg_param(struct ucom_softc *ucom, struct termios *t) 517 { 518 struct umct_softc *sc = ucom->sc_parent; 519 uint32_t value; 520 521 value = umct_calc_baud(t->c_ospeed); 522 umct_cfg_do_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value); 523 524 value = (sc->sc_lcr & 0x40); 525 526 switch (t->c_cflag & CSIZE) { 527 case CS5: 528 value |= 0x0; 529 break; 530 case CS6: 531 value |= 0x1; 532 break; 533 case CS7: 534 value |= 0x2; 535 break; 536 default: 537 case CS8: 538 value |= 0x3; 539 break; 540 } 541 542 value |= (t->c_cflag & CSTOPB) ? 0x4 : 0; 543 if (t->c_cflag & PARENB) { 544 value |= 0x8; 545 value |= (t->c_cflag & PARODD) ? 0x0 : 0x10; 546 } 547 /* 548 * XXX There doesn't seem to be a way to tell the device 549 * to use flow control. 550 */ 551 552 sc->sc_lcr = value; 553 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value); 554 } 555 556 static void 557 umct_start_read(struct ucom_softc *ucom) 558 { 559 struct umct_softc *sc = ucom->sc_parent; 560 561 /* start interrupt endpoint */ 562 usbd_transfer_start(sc->sc_xfer[UMCT_INTR_DT_RD]); 563 564 /* start read endpoint */ 565 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_RD]); 566 } 567 568 static void 569 umct_stop_read(struct ucom_softc *ucom) 570 { 571 struct umct_softc *sc = ucom->sc_parent; 572 573 /* stop interrupt endpoint */ 574 usbd_transfer_stop(sc->sc_xfer[UMCT_INTR_DT_RD]); 575 576 /* stop read endpoint */ 577 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_RD]); 578 } 579 580 static void 581 umct_start_write(struct ucom_softc *ucom) 582 { 583 struct umct_softc *sc = ucom->sc_parent; 584 585 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_WR]); 586 } 587 588 static void 589 umct_stop_write(struct ucom_softc *ucom) 590 { 591 struct umct_softc *sc = ucom->sc_parent; 592 593 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_WR]); 594 } 595 596 static void 597 umct_read_callback(struct usb_xfer *xfer, usb_error_t error) 598 { 599 struct umct_softc *sc = usbd_xfer_softc(xfer); 600 601 if (sc->sc_swap_cb) 602 umct_intr_callback_sub(xfer, error); 603 else 604 umct_read_callback_sub(xfer, error); 605 } 606 607 static void 608 umct_intr_callback(struct usb_xfer *xfer, usb_error_t error) 609 { 610 struct umct_softc *sc = usbd_xfer_softc(xfer); 611 612 if (sc->sc_swap_cb) 613 umct_read_callback_sub(xfer, error); 614 else 615 umct_intr_callback_sub(xfer, error); 616 } 617 618 static void 619 umct_write_callback(struct usb_xfer *xfer, usb_error_t error) 620 { 621 struct umct_softc *sc = usbd_xfer_softc(xfer); 622 struct usb_page_cache *pc; 623 uint32_t actlen; 624 625 switch (USB_GET_STATE(xfer)) { 626 case USB_ST_SETUP: 627 case USB_ST_TRANSFERRED: 628 tr_setup: 629 pc = usbd_xfer_get_frame(xfer, 0); 630 if (ucom_get_data(&sc->sc_ucom, pc, 0, 631 sc->sc_obufsize, &actlen)) { 632 633 usbd_xfer_set_frame_len(xfer, 0, actlen); 634 usbd_transfer_submit(xfer); 635 } 636 return; 637 638 default: /* Error */ 639 if (error != USB_ERR_CANCELLED) { 640 /* try to clear stall first */ 641 usbd_xfer_set_stall(xfer); 642 goto tr_setup; 643 } 644 return; 645 } 646 } 647 648 static void 649 umct_read_callback_sub(struct usb_xfer *xfer, usb_error_t error) 650 { 651 struct umct_softc *sc = usbd_xfer_softc(xfer); 652 struct usb_page_cache *pc; 653 int actlen; 654 655 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 656 657 switch (USB_GET_STATE(xfer)) { 658 case USB_ST_TRANSFERRED: 659 pc = usbd_xfer_get_frame(xfer, 0); 660 ucom_put_data(&sc->sc_ucom, pc, 0, actlen); 661 662 case USB_ST_SETUP: 663 tr_setup: 664 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 665 usbd_transfer_submit(xfer); 666 return; 667 668 default: /* Error */ 669 if (error != USB_ERR_CANCELLED) { 670 /* try to clear stall first */ 671 usbd_xfer_set_stall(xfer); 672 goto tr_setup; 673 } 674 return; 675 } 676 } 677 678 static void 679 umct_poll(struct ucom_softc *ucom) 680 { 681 struct umct_softc *sc = ucom->sc_parent; 682 usbd_transfer_poll(sc->sc_xfer, UMCT_N_TRANSFER); 683 } 684