1 /* $NetBSD: ucom.c,v 1.83 2010/02/20 14:52:22 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * This code is very heavily based on the 16550 driver, com.c. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.83 2010/02/20 14:52:22 pooka Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/ioctl.h> 43 #include <sys/conf.h> 44 #include <sys/tty.h> 45 #include <sys/file.h> 46 #include <sys/select.h> 47 #include <sys/proc.h> 48 #include <sys/vnode.h> 49 #include <sys/device.h> 50 #include <sys/poll.h> 51 #include <sys/queue.h> 52 #include <sys/kauth.h> 53 #if defined(__NetBSD__) 54 #include "rnd.h" 55 #if NRND > 0 56 #include <sys/rnd.h> 57 #endif 58 #endif 59 60 #include <dev/usb/usb.h> 61 62 #include <dev/usb/usbdi.h> 63 #include <dev/usb/usbdi_util.h> 64 #include <dev/usb/usbdevs.h> 65 #include <dev/usb/usb_quirks.h> 66 67 #include <dev/usb/ucomvar.h> 68 69 #include "ucom.h" 70 71 #include "locators.h" 72 73 #if NUCOM > 0 74 75 #ifdef UCOM_DEBUG 76 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 77 int ucomdebug = 0; 78 #else 79 #define DPRINTFN(n, x) 80 #endif 81 #define DPRINTF(x) DPRINTFN(0, x) 82 83 #define UCOMUNIT_MASK 0x3ffff 84 #define UCOMDIALOUT_MASK 0x80000 85 #define UCOMCALLUNIT_MASK 0x40000 86 87 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 88 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 89 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 90 91 /* 92 * XXX: We can submit multiple input/output buffers to the usb stack 93 * to improve throughput, but the usb stack is too lame to deal with this 94 * in a number of places. 95 */ 96 #define UCOM_IN_BUFFS 1 97 #define UCOM_OUT_BUFFS 1 98 99 struct ucom_buffer { 100 SIMPLEQ_ENTRY(ucom_buffer) ub_link; 101 usbd_xfer_handle ub_xfer; 102 u_char *ub_data; 103 u_int ub_len; 104 u_int ub_index; 105 }; 106 107 struct ucom_softc { 108 USBBASEDEVICE sc_dev; /* base device */ 109 110 usbd_device_handle sc_udev; /* USB device */ 111 112 usbd_interface_handle sc_iface; /* data interface */ 113 114 int sc_bulkin_no; /* bulk in endpoint address */ 115 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 116 u_int sc_ibufsize; /* read buffer size */ 117 u_int sc_ibufsizepad; /* read buffer size padded */ 118 struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; 119 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; 120 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; 121 122 int sc_bulkout_no; /* bulk out endpoint address */ 123 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 124 u_int sc_obufsize; /* write buffer size */ 125 u_int sc_opkthdrlen; /* header length of */ 126 struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; 127 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; 128 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; 129 130 void *sc_si; 131 132 struct ucom_methods *sc_methods; 133 void *sc_parent; 134 int sc_portno; 135 136 struct tty *sc_tty; /* our tty */ 137 u_char sc_lsr; 138 u_char sc_msr; 139 u_char sc_mcr; 140 volatile u_char sc_rx_stopped; 141 u_char sc_rx_unblock; 142 u_char sc_tx_stopped; 143 int sc_swflags; 144 145 u_char sc_opening; /* lock during open */ 146 int sc_refcnt; 147 u_char sc_dying; /* disconnecting */ 148 149 #if defined(__NetBSD__) && NRND > 0 150 rndsource_element_t sc_rndsource; /* random source */ 151 #endif 152 }; 153 154 dev_type_open(ucomopen); 155 dev_type_close(ucomclose); 156 dev_type_read(ucomread); 157 dev_type_write(ucomwrite); 158 dev_type_ioctl(ucomioctl); 159 dev_type_stop(ucomstop); 160 dev_type_tty(ucomtty); 161 dev_type_poll(ucompoll); 162 163 const struct cdevsw ucom_cdevsw = { 164 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 165 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 166 }; 167 168 static void ucom_cleanup(struct ucom_softc *); 169 static int ucomparam(struct tty *, struct termios *); 170 static int ucomhwiflow(struct tty *, int); 171 static void ucomstart(struct tty *); 172 static void ucom_shutdown(struct ucom_softc *); 173 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 174 int, struct lwp *); 175 static void ucom_dtr(struct ucom_softc *, int); 176 static void ucom_rts(struct ucom_softc *, int); 177 static void ucom_break(struct ucom_softc *, int); 178 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 179 static int ucom_to_tiocm(struct ucom_softc *); 180 181 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 182 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 183 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 184 usbd_status); 185 186 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 187 static void ucom_read_complete(struct ucom_softc *); 188 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 189 static void ucom_softintr(void *); 190 191 USB_DECLARE_DRIVER(ucom); 192 193 USB_MATCH(ucom) 194 { 195 return (1); 196 } 197 198 USB_ATTACH(ucom) 199 { 200 struct ucom_softc *sc = device_private(self); 201 struct ucom_attach_args *uca = aux; 202 struct tty *tp; 203 204 if (uca->info != NULL) 205 aprint_normal(": %s", uca->info); 206 aprint_normal("\n"); 207 208 sc->sc_dev = self; 209 sc->sc_udev = uca->device; 210 sc->sc_iface = uca->iface; 211 sc->sc_bulkout_no = uca->bulkout; 212 sc->sc_bulkin_no = uca->bulkin; 213 sc->sc_ibufsize = uca->ibufsize; 214 sc->sc_ibufsizepad = uca->ibufsizepad; 215 sc->sc_obufsize = uca->obufsize; 216 sc->sc_opkthdrlen = uca->opkthdrlen; 217 sc->sc_methods = uca->methods; 218 sc->sc_parent = uca->arg; 219 sc->sc_portno = uca->portno; 220 221 sc->sc_lsr = 0; 222 sc->sc_msr = 0; 223 sc->sc_mcr = 0; 224 sc->sc_tx_stopped = 0; 225 sc->sc_swflags = 0; 226 sc->sc_opening = 0; 227 sc->sc_refcnt = 0; 228 sc->sc_dying = 0; 229 230 sc->sc_si = softint_establish(SOFTINT_NET, ucom_softintr, sc); 231 232 tp = ttymalloc(); 233 tp->t_oproc = ucomstart; 234 tp->t_param = ucomparam; 235 tp->t_hwiflow = ucomhwiflow; 236 sc->sc_tty = tp; 237 238 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 239 tty_attach(tp); 240 241 #if defined(__NetBSD__) && NRND > 0 242 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 243 RND_TYPE_TTY, 0); 244 #endif 245 246 if (!pmf_device_register(self, NULL, NULL)) 247 aprint_error_dev(self, "couldn't establish power handler\n"); 248 USB_ATTACH_SUCCESS_RETURN; 249 } 250 251 USB_DETACH(ucom) 252 { 253 struct ucom_softc *sc = device_private(self); 254 struct tty *tp = sc->sc_tty; 255 int maj, mn; 256 int s, i; 257 258 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 259 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 260 261 sc->sc_dying = 1; 262 pmf_device_deregister(self); 263 264 if (sc->sc_bulkin_pipe != NULL) 265 usbd_abort_pipe(sc->sc_bulkin_pipe); 266 if (sc->sc_bulkout_pipe != NULL) 267 usbd_abort_pipe(sc->sc_bulkout_pipe); 268 269 s = splusb(); 270 if (--sc->sc_refcnt >= 0) { 271 /* Wake up anyone waiting */ 272 if (tp != NULL) { 273 mutex_spin_enter(&tty_lock); 274 CLR(tp->t_state, TS_CARR_ON); 275 CLR(tp->t_cflag, CLOCAL | MDMBUF); 276 ttyflush(tp, FREAD|FWRITE); 277 mutex_spin_exit(&tty_lock); 278 } 279 /* Wait for processes to go away. */ 280 usb_detach_wait(USBDEV(sc->sc_dev)); 281 } 282 283 softint_disestablish(sc->sc_si); 284 splx(s); 285 286 /* locate the major number */ 287 maj = cdevsw_lookup_major(&ucom_cdevsw); 288 289 /* Nuke the vnodes for any open instances. */ 290 mn = device_unit(self); 291 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 292 vdevgone(maj, mn, mn, VCHR); 293 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 294 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 295 296 /* Detach and free the tty. */ 297 if (tp != NULL) { 298 tty_detach(tp); 299 ttyfree(tp); 300 sc->sc_tty = NULL; 301 } 302 303 for (i = 0; i < UCOM_IN_BUFFS; i++) { 304 if (sc->sc_ibuff[i].ub_xfer != NULL) 305 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 306 } 307 308 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 309 if (sc->sc_obuff[i].ub_xfer != NULL) 310 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 311 } 312 313 /* Detach the random source */ 314 #if defined(__NetBSD__) && NRND > 0 315 rnd_detach_source(&sc->sc_rndsource); 316 #endif 317 318 return (0); 319 } 320 321 int 322 ucom_activate(device_ptr_t self, enum devact act) 323 { 324 struct ucom_softc *sc = device_private(self); 325 326 DPRINTFN(5,("ucom_activate: %d\n", act)); 327 328 switch (act) { 329 case DVACT_DEACTIVATE: 330 sc->sc_dying = 1; 331 return 0; 332 default: 333 return EOPNOTSUPP; 334 } 335 } 336 337 void 338 ucom_shutdown(struct ucom_softc *sc) 339 { 340 struct tty *tp = sc->sc_tty; 341 342 DPRINTF(("ucom_shutdown\n")); 343 /* 344 * Hang up if necessary. Wait a bit, so the other side has time to 345 * notice even if we immediately open the port again. 346 */ 347 if (ISSET(tp->t_cflag, HUPCL)) { 348 ucom_dtr(sc, 0); 349 (void)tsleep(sc, TTIPRI, ttclos, hz); 350 } 351 } 352 353 int 354 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 355 { 356 int unit = UCOMUNIT(dev); 357 usbd_status err; 358 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 359 struct ucom_buffer *ub; 360 struct tty *tp; 361 int s, i; 362 int error; 363 364 if (sc == NULL) 365 return (ENXIO); 366 367 if (sc->sc_dying) 368 return (EIO); 369 370 if (!device_is_active(sc->sc_dev)) 371 return (ENXIO); 372 373 tp = sc->sc_tty; 374 375 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 376 377 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 378 return (EBUSY); 379 380 s = spltty(); 381 382 /* 383 * Do the following iff this is a first open. 384 */ 385 while (sc->sc_opening) 386 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 387 388 if (sc->sc_dying) { 389 splx(s); 390 return (EIO); 391 } 392 sc->sc_opening = 1; 393 394 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 395 struct termios t; 396 397 tp->t_dev = dev; 398 399 if (sc->sc_methods->ucom_open != NULL) { 400 error = sc->sc_methods->ucom_open(sc->sc_parent, 401 sc->sc_portno); 402 if (error) { 403 ucom_cleanup(sc); 404 sc->sc_opening = 0; 405 wakeup(&sc->sc_opening); 406 splx(s); 407 return (error); 408 } 409 } 410 411 ucom_status_change(sc); 412 413 /* 414 * Initialize the termios status to the defaults. Add in the 415 * sticky bits from TIOCSFLAGS. 416 */ 417 t.c_ispeed = 0; 418 t.c_ospeed = TTYDEF_SPEED; 419 t.c_cflag = TTYDEF_CFLAG; 420 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 421 SET(t.c_cflag, CLOCAL); 422 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 423 SET(t.c_cflag, CRTSCTS); 424 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 425 SET(t.c_cflag, MDMBUF); 426 /* Make sure ucomparam() will do something. */ 427 tp->t_ospeed = 0; 428 (void) ucomparam(tp, &t); 429 tp->t_iflag = TTYDEF_IFLAG; 430 tp->t_oflag = TTYDEF_OFLAG; 431 tp->t_lflag = TTYDEF_LFLAG; 432 ttychars(tp); 433 ttsetwater(tp); 434 435 /* 436 * Turn on DTR. We must always do this, even if carrier is not 437 * present, because otherwise we'd have to use TIOCSDTR 438 * immediately after setting CLOCAL, which applications do not 439 * expect. We always assert DTR while the device is open 440 * unless explicitly requested to deassert it. Ditto RTS. 441 */ 442 ucom_dtr(sc, 1); 443 ucom_rts(sc, 1); 444 445 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 446 sc->sc_bulkin_no, sc->sc_bulkout_no)); 447 448 /* Open the bulk pipes */ 449 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 450 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 451 if (err) { 452 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 453 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 454 usbd_errstr(err))); 455 error = EIO; 456 goto fail_0; 457 } 458 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 459 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 460 if (err) { 461 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 462 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 463 usbd_errstr(err))); 464 error = EIO; 465 goto fail_1; 466 } 467 468 sc->sc_rx_unblock = 0; 469 sc->sc_rx_stopped = 0; 470 sc->sc_tx_stopped = 0; 471 472 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 473 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 474 475 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 476 SIMPLEQ_INIT(&sc->sc_ibuff_full); 477 SIMPLEQ_INIT(&sc->sc_obuff_free); 478 SIMPLEQ_INIT(&sc->sc_obuff_full); 479 480 /* Allocate input buffers */ 481 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 482 ub++) { 483 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 484 if (ub->ub_xfer == NULL) { 485 error = ENOMEM; 486 goto fail_2; 487 } 488 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 489 sc->sc_ibufsizepad); 490 if (ub->ub_data == NULL) { 491 error = ENOMEM; 492 goto fail_2; 493 } 494 495 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 496 error = EIO; 497 goto fail_2; 498 } 499 } 500 501 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 502 ub++) { 503 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 504 if (ub->ub_xfer == NULL) { 505 error = ENOMEM; 506 goto fail_2; 507 } 508 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 509 sc->sc_obufsize); 510 if (ub->ub_data == NULL) { 511 error = ENOMEM; 512 goto fail_2; 513 } 514 515 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 516 } 517 518 } 519 sc->sc_opening = 0; 520 wakeup(&sc->sc_opening); 521 splx(s); 522 523 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 524 if (error) 525 goto bad; 526 527 error = (*tp->t_linesw->l_open)(dev, tp); 528 if (error) 529 goto bad; 530 531 return (0); 532 533 fail_2: 534 usbd_abort_pipe(sc->sc_bulkin_pipe); 535 for (i = 0; i < UCOM_IN_BUFFS; i++) { 536 if (sc->sc_ibuff[i].ub_xfer != NULL) { 537 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 538 sc->sc_ibuff[i].ub_xfer = NULL; 539 sc->sc_ibuff[i].ub_data = NULL; 540 } 541 } 542 usbd_abort_pipe(sc->sc_bulkout_pipe); 543 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 544 if (sc->sc_obuff[i].ub_xfer != NULL) { 545 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 546 sc->sc_obuff[i].ub_xfer = NULL; 547 sc->sc_obuff[i].ub_data = NULL; 548 } 549 } 550 551 usbd_close_pipe(sc->sc_bulkout_pipe); 552 sc->sc_bulkout_pipe = NULL; 553 fail_1: 554 usbd_close_pipe(sc->sc_bulkin_pipe); 555 sc->sc_bulkin_pipe = NULL; 556 fail_0: 557 sc->sc_opening = 0; 558 wakeup(&sc->sc_opening); 559 splx(s); 560 return (error); 561 562 bad: 563 s = spltty(); 564 CLR(tp->t_state, TS_BUSY); 565 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 566 /* 567 * We failed to open the device, and nobody else had it opened. 568 * Clean up the state as appropriate. 569 */ 570 ucom_cleanup(sc); 571 } 572 splx(s); 573 574 return (error); 575 } 576 577 int 578 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 579 { 580 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 581 struct tty *tp = sc->sc_tty; 582 int s; 583 584 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 585 if (!ISSET(tp->t_state, TS_ISOPEN)) 586 return (0); 587 588 s = spltty(); 589 sc->sc_refcnt++; 590 CLR(tp->t_state, TS_BUSY); 591 592 (*tp->t_linesw->l_close)(tp, flag); 593 ttyclose(tp); 594 595 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 596 /* 597 * Although we got a last close, the device may still be in 598 * use; e.g. if this was the dialout node, and there are still 599 * processes waiting for carrier on the non-dialout node. 600 */ 601 ucom_cleanup(sc); 602 } 603 604 if (sc->sc_methods->ucom_close != NULL) 605 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 606 607 if (--sc->sc_refcnt < 0) 608 usb_detach_wakeup(USBDEV(sc->sc_dev)); 609 splx(s); 610 611 return (0); 612 } 613 614 int 615 ucomread(dev_t dev, struct uio *uio, int flag) 616 { 617 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 618 struct tty *tp = sc->sc_tty; 619 int error; 620 621 if (sc->sc_dying) 622 return (EIO); 623 624 sc->sc_refcnt++; 625 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 626 if (--sc->sc_refcnt < 0) 627 usb_detach_wakeup(USBDEV(sc->sc_dev)); 628 return (error); 629 } 630 631 int 632 ucomwrite(dev_t dev, struct uio *uio, int flag) 633 { 634 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 635 struct tty *tp = sc->sc_tty; 636 int error; 637 638 if (sc->sc_dying) 639 return (EIO); 640 641 sc->sc_refcnt++; 642 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 643 if (--sc->sc_refcnt < 0) 644 usb_detach_wakeup(USBDEV(sc->sc_dev)); 645 return (error); 646 } 647 648 int 649 ucompoll(dev_t dev, int events, struct lwp *l) 650 { 651 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 652 struct tty *tp = sc->sc_tty; 653 int revents; 654 655 if (sc->sc_dying) 656 return (POLLHUP); 657 658 sc->sc_refcnt++; 659 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 660 if (--sc->sc_refcnt < 0) 661 usb_detach_wakeup(USBDEV(sc->sc_dev)); 662 return (revents); 663 } 664 665 struct tty * 666 ucomtty(dev_t dev) 667 { 668 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 669 struct tty *tp = sc->sc_tty; 670 671 return (tp); 672 } 673 674 int 675 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 676 { 677 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 678 int error; 679 680 sc->sc_refcnt++; 681 error = ucom_do_ioctl(sc, cmd, data, flag, l); 682 if (--sc->sc_refcnt < 0) 683 usb_detach_wakeup(USBDEV(sc->sc_dev)); 684 return (error); 685 } 686 687 static int 688 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 689 int flag, struct lwp *l) 690 { 691 struct tty *tp = sc->sc_tty; 692 int error; 693 int s; 694 695 if (sc->sc_dying) 696 return (EIO); 697 698 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 699 700 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 701 if (error != EPASSTHROUGH) 702 return (error); 703 704 error = ttioctl(tp, cmd, data, flag, l); 705 if (error != EPASSTHROUGH) 706 return (error); 707 708 if (sc->sc_methods->ucom_ioctl != NULL) { 709 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 710 sc->sc_portno, cmd, data, flag, l->l_proc); 711 if (error != EPASSTHROUGH) 712 return (error); 713 } 714 715 error = 0; 716 717 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 718 s = spltty(); 719 720 switch (cmd) { 721 case TIOCSBRK: 722 ucom_break(sc, 1); 723 break; 724 725 case TIOCCBRK: 726 ucom_break(sc, 0); 727 break; 728 729 case TIOCSDTR: 730 ucom_dtr(sc, 1); 731 break; 732 733 case TIOCCDTR: 734 ucom_dtr(sc, 0); 735 break; 736 737 case TIOCGFLAGS: 738 *(int *)data = sc->sc_swflags; 739 break; 740 741 case TIOCSFLAGS: 742 error = kauth_authorize_device_tty(l->l_cred, 743 KAUTH_DEVICE_TTY_PRIVSET, tp); 744 if (error) 745 break; 746 sc->sc_swflags = *(int *)data; 747 break; 748 749 case TIOCMSET: 750 case TIOCMBIS: 751 case TIOCMBIC: 752 tiocm_to_ucom(sc, cmd, *(int *)data); 753 break; 754 755 case TIOCMGET: 756 *(int *)data = ucom_to_tiocm(sc); 757 break; 758 759 default: 760 error = EPASSTHROUGH; 761 break; 762 } 763 764 splx(s); 765 766 return (error); 767 } 768 769 static void 770 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 771 { 772 u_char combits; 773 774 combits = 0; 775 if (ISSET(ttybits, TIOCM_DTR)) 776 SET(combits, UMCR_DTR); 777 if (ISSET(ttybits, TIOCM_RTS)) 778 SET(combits, UMCR_RTS); 779 780 switch (how) { 781 case TIOCMBIC: 782 CLR(sc->sc_mcr, combits); 783 break; 784 785 case TIOCMBIS: 786 SET(sc->sc_mcr, combits); 787 break; 788 789 case TIOCMSET: 790 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 791 SET(sc->sc_mcr, combits); 792 break; 793 } 794 795 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 796 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 797 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 798 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 799 } 800 801 static int 802 ucom_to_tiocm(struct ucom_softc *sc) 803 { 804 u_char combits; 805 int ttybits = 0; 806 807 combits = sc->sc_mcr; 808 if (ISSET(combits, UMCR_DTR)) 809 SET(ttybits, TIOCM_DTR); 810 if (ISSET(combits, UMCR_RTS)) 811 SET(ttybits, TIOCM_RTS); 812 813 combits = sc->sc_msr; 814 if (ISSET(combits, UMSR_DCD)) 815 SET(ttybits, TIOCM_CD); 816 if (ISSET(combits, UMSR_CTS)) 817 SET(ttybits, TIOCM_CTS); 818 if (ISSET(combits, UMSR_DSR)) 819 SET(ttybits, TIOCM_DSR); 820 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 821 SET(ttybits, TIOCM_RI); 822 823 #if 0 824 XXX; 825 if (sc->sc_ier != 0) 826 SET(ttybits, TIOCM_LE); 827 #endif 828 829 return (ttybits); 830 } 831 832 static void 833 ucom_break(struct ucom_softc *sc, int onoff) 834 { 835 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 836 837 if (sc->sc_methods->ucom_set != NULL) 838 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 839 UCOM_SET_BREAK, onoff); 840 } 841 842 static void 843 ucom_dtr(struct ucom_softc *sc, int onoff) 844 { 845 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 846 847 if (sc->sc_methods->ucom_set != NULL) 848 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 849 UCOM_SET_DTR, onoff); 850 } 851 852 static void 853 ucom_rts(struct ucom_softc *sc, int onoff) 854 { 855 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 856 857 if (sc->sc_methods->ucom_set != NULL) 858 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 859 UCOM_SET_RTS, onoff); 860 } 861 862 void 863 ucom_status_change(struct ucom_softc *sc) 864 { 865 struct tty *tp = sc->sc_tty; 866 u_char old_msr; 867 868 if (sc->sc_methods->ucom_get_status != NULL) { 869 old_msr = sc->sc_msr; 870 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 871 &sc->sc_lsr, &sc->sc_msr); 872 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 873 (*tp->t_linesw->l_modem)(tp, 874 ISSET(sc->sc_msr, UMSR_DCD)); 875 } else { 876 sc->sc_lsr = 0; 877 /* Assume DCD is present, if we have no chance to check it. */ 878 sc->sc_msr = UMSR_DCD; 879 } 880 } 881 882 static int 883 ucomparam(struct tty *tp, struct termios *t) 884 { 885 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 886 UCOMUNIT(tp->t_dev)); 887 int error; 888 889 if (sc->sc_dying) 890 return (EIO); 891 892 /* Check requested parameters. */ 893 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 894 return (EINVAL); 895 896 /* 897 * For the console, always force CLOCAL and !HUPCL, so that the port 898 * is always active. 899 */ 900 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 901 SET(t->c_cflag, CLOCAL); 902 CLR(t->c_cflag, HUPCL); 903 } 904 905 /* 906 * If there were no changes, don't do anything. This avoids dropping 907 * input and improves performance when all we did was frob things like 908 * VMIN and VTIME. 909 */ 910 if (tp->t_ospeed == t->c_ospeed && 911 tp->t_cflag == t->c_cflag) 912 return (0); 913 914 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 915 916 /* And copy to tty. */ 917 tp->t_ispeed = 0; 918 tp->t_ospeed = t->c_ospeed; 919 tp->t_cflag = t->c_cflag; 920 921 if (sc->sc_methods->ucom_param != NULL) { 922 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 923 t); 924 if (error) 925 return (error); 926 } 927 928 /* XXX worry about CHWFLOW */ 929 930 /* 931 * Update the tty layer's idea of the carrier bit, in case we changed 932 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 933 * explicit request. 934 */ 935 DPRINTF(("ucomparam: l_modem\n")); 936 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 937 938 #if 0 939 XXX what if the hardware is not open 940 if (!ISSET(t->c_cflag, CHWFLOW)) { 941 if (sc->sc_tx_stopped) { 942 sc->sc_tx_stopped = 0; 943 ucomstart(tp); 944 } 945 } 946 #endif 947 948 return (0); 949 } 950 951 static int 952 ucomhwiflow(struct tty *tp, int block) 953 { 954 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 955 UCOMUNIT(tp->t_dev)); 956 int old; 957 958 old = sc->sc_rx_stopped; 959 sc->sc_rx_stopped = (u_char)block; 960 961 if (old && !block) { 962 int s = splusb(); 963 sc->sc_rx_unblock = 1; 964 softint_schedule(sc->sc_si); 965 splx(s); 966 } 967 968 return (1); 969 } 970 971 static void 972 ucomstart(struct tty *tp) 973 { 974 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 975 UCOMUNIT(tp->t_dev)); 976 struct ucom_buffer *ub; 977 int s; 978 u_char *data; 979 int cnt; 980 981 if (sc->sc_dying) 982 return; 983 984 s = spltty(); 985 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 986 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 987 goto out; 988 } 989 if (sc->sc_tx_stopped) 990 goto out; 991 992 if (!ttypull(tp)) 993 goto out; 994 995 /* Grab the first contiguous region of buffer space. */ 996 data = tp->t_outq.c_cf; 997 cnt = ndqb(&tp->t_outq, 0); 998 999 if (cnt == 0) { 1000 DPRINTF(("ucomstart: cnt==0\n")); 1001 goto out; 1002 } 1003 1004 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1005 KASSERT(ub != NULL); 1006 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1007 1008 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1009 SET(tp->t_state, TS_BUSY); 1010 1011 if (cnt > sc->sc_obufsize) 1012 cnt = sc->sc_obufsize; 1013 1014 if (sc->sc_methods->ucom_write != NULL) 1015 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1016 ub->ub_data, data, &cnt); 1017 else 1018 memcpy(ub->ub_data, data, cnt); 1019 1020 ub->ub_len = cnt; 1021 ub->ub_index = 0; 1022 1023 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1024 1025 softint_schedule(sc->sc_si); 1026 1027 out: 1028 splx(s); 1029 } 1030 1031 void 1032 ucomstop(struct tty *tp, int flag) 1033 { 1034 DPRINTF(("ucomstop: flag=%d\n", flag)); 1035 #if 0 1036 /*struct ucom_softc *sc = 1037 device_lookup_private(&ucom_cd, UCOMUNIT(dev));*/ 1038 int s; 1039 1040 s = spltty(); 1041 if (ISSET(tp->t_state, TS_BUSY)) { 1042 DPRINTF(("ucomstop: XXX\n")); 1043 /* sc->sc_tx_stopped = 1; */ 1044 if (!ISSET(tp->t_state, TS_TTSTOP)) 1045 SET(tp->t_state, TS_FLUSH); 1046 } 1047 splx(s); 1048 #endif 1049 } 1050 1051 static void 1052 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1053 usbd_status err) 1054 { 1055 struct tty *tp = sc->sc_tty; 1056 uint32_t cc = ub->ub_len; 1057 1058 switch (err) { 1059 case USBD_IN_PROGRESS: 1060 ub->ub_index = ub->ub_len; 1061 break; 1062 case USBD_STALLED: 1063 ub->ub_index = 0; 1064 softint_schedule(sc->sc_si); 1065 break; 1066 case USBD_NORMAL_COMPLETION: 1067 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1068 #if defined(__NetBSD__) && NRND > 0 1069 rnd_add_uint32(&sc->sc_rndsource, cc); 1070 #endif 1071 /*FALLTHROUGH*/ 1072 default: 1073 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1074 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1075 cc -= sc->sc_opkthdrlen; 1076 1077 CLR(tp->t_state, TS_BUSY); 1078 if (ISSET(tp->t_state, TS_FLUSH)) 1079 CLR(tp->t_state, TS_FLUSH); 1080 else 1081 ndflush(&tp->t_outq, cc); 1082 1083 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1084 !sc->sc_dying) { 1085 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1086 ucom_submit_write(sc, ub); 1087 1088 (*tp->t_linesw->l_start)(tp); 1089 } 1090 break; 1091 } 1092 } 1093 1094 /* Call at spltty() */ 1095 static void 1096 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1097 { 1098 1099 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkout_pipe, 1100 (usbd_private_handle)sc, ub->ub_data, ub->ub_len, 1101 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 1102 1103 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1104 } 1105 1106 static void 1107 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1108 { 1109 struct ucom_softc *sc = (struct ucom_softc *)p; 1110 int s; 1111 1112 s = spltty(); 1113 1114 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1115 1116 splx(s); 1117 } 1118 1119 static void 1120 ucom_softintr(void *arg) 1121 { 1122 struct ucom_softc *sc = arg; 1123 struct tty *tp = sc->sc_tty; 1124 struct ucom_buffer *ub; 1125 int s; 1126 1127 if (!ISSET(tp->t_state, TS_ISOPEN)) 1128 return; 1129 1130 s = spltty(); 1131 1132 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1133 1134 if (ub != NULL && ub->ub_index == 0) 1135 ucom_submit_write(sc, ub); 1136 1137 if (sc->sc_rx_unblock) 1138 ucom_read_complete(sc); 1139 1140 splx(s); 1141 } 1142 1143 static void 1144 ucom_read_complete(struct ucom_softc *sc) 1145 { 1146 int (*rint)(int, struct tty *); 1147 struct ucom_buffer *ub; 1148 struct tty *tp; 1149 int s; 1150 1151 tp = sc->sc_tty; 1152 rint = tp->t_linesw->l_rint; 1153 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1154 1155 while (ub != NULL && !sc->sc_rx_stopped) { 1156 1157 s = spltty(); 1158 1159 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1160 /* Give characters to tty layer. */ 1161 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1162 /* Overflow: drop remainder */ 1163 ub->ub_index = ub->ub_len; 1164 } else 1165 ub->ub_index++; 1166 } 1167 1168 splx(s); 1169 1170 if (ub->ub_index == ub->ub_len) { 1171 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1172 1173 ucomsubmitread(sc, ub); 1174 1175 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1176 } 1177 } 1178 1179 sc->sc_rx_unblock = (ub != NULL); 1180 } 1181 1182 static usbd_status 1183 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1184 { 1185 usbd_status err; 1186 1187 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkin_pipe, 1188 (usbd_private_handle)sc, ub->ub_data, sc->sc_ibufsize, 1189 USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, ucomreadcb); 1190 1191 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1192 /* XXX: Recover from this, please! */ 1193 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1194 return (err); 1195 } 1196 1197 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1198 1199 return (USBD_NORMAL_COMPLETION); 1200 } 1201 1202 static void 1203 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1204 { 1205 struct ucom_softc *sc = (struct ucom_softc *)p; 1206 struct tty *tp = sc->sc_tty; 1207 struct ucom_buffer *ub; 1208 u_int32_t cc; 1209 u_char *cp; 1210 int s; 1211 1212 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1213 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1214 1215 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1216 sc->sc_dying) { 1217 DPRINTF(("ucomreadcb: dying\n")); 1218 ub->ub_index = ub->ub_len = 0; 1219 /* Send something to wake upper layer */ 1220 s = spltty(); 1221 if (status != USBD_CANCELLED) { 1222 (tp->t_linesw->l_rint)('\n', tp); 1223 mutex_spin_enter(&tty_lock); /* XXX */ 1224 ttwakeup(tp); 1225 mutex_spin_exit(&tty_lock); /* XXX */ 1226 } 1227 splx(s); 1228 return; 1229 } 1230 1231 if (status == USBD_STALLED) { 1232 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1233 ucomsubmitread(sc, ub); 1234 return; 1235 } 1236 1237 if (status != USBD_NORMAL_COMPLETION) { 1238 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1239 return; 1240 } 1241 1242 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1243 1244 if (cc == 0) { 1245 aprint_normal_dev(sc->sc_dev, 1246 "ucomreadcb: zero length xfer!\n"); 1247 } 1248 1249 KDASSERT(cp == ub->ub_data); 1250 1251 #if defined(__NetBSD__) && NRND > 0 1252 rnd_add_uint32(&sc->sc_rndsource, cc); 1253 #endif 1254 1255 if (sc->sc_opening) { 1256 ucomsubmitread(sc, ub); 1257 return; 1258 } 1259 1260 if (sc->sc_methods->ucom_read != NULL) { 1261 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1262 &cp, &cc); 1263 ub->ub_index = (u_int)(cp - ub->ub_data); 1264 } else 1265 ub->ub_index = 0; 1266 1267 ub->ub_len = cc; 1268 1269 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1270 1271 ucom_read_complete(sc); 1272 } 1273 1274 static void 1275 ucom_cleanup(struct ucom_softc *sc) 1276 { 1277 struct ucom_buffer *ub; 1278 1279 DPRINTF(("ucom_cleanup: closing pipes\n")); 1280 1281 ucom_shutdown(sc); 1282 if (sc->sc_bulkin_pipe != NULL) { 1283 usbd_abort_pipe(sc->sc_bulkin_pipe); 1284 usbd_close_pipe(sc->sc_bulkin_pipe); 1285 sc->sc_bulkin_pipe = NULL; 1286 } 1287 if (sc->sc_bulkout_pipe != NULL) { 1288 usbd_abort_pipe(sc->sc_bulkout_pipe); 1289 usbd_close_pipe(sc->sc_bulkout_pipe); 1290 sc->sc_bulkout_pipe = NULL; 1291 } 1292 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; ub++) { 1293 if (ub->ub_xfer != NULL) { 1294 usbd_free_xfer(ub->ub_xfer); 1295 ub->ub_xfer = NULL; 1296 ub->ub_data = NULL; 1297 } 1298 } 1299 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; ub++){ 1300 if (ub->ub_xfer != NULL) { 1301 usbd_free_xfer(ub->ub_xfer); 1302 ub->ub_xfer = NULL; 1303 ub->ub_data = NULL; 1304 } 1305 } 1306 } 1307 1308 #endif /* NUCOM > 0 */ 1309 1310 int 1311 ucomprint(void *aux, const char *pnp) 1312 { 1313 struct ucom_attach_args *uca = aux; 1314 1315 if (pnp) 1316 aprint_normal("ucom at %s", pnp); 1317 if (uca->portno != UCOM_UNK_PORTNO) 1318 aprint_normal(" portno %d", uca->portno); 1319 return (UNCONF); 1320 } 1321 1322 int 1323 ucomsubmatch(device_t parent, cfdata_t cf, 1324 const int *ldesc, void *aux) 1325 { 1326 struct ucom_attach_args *uca = aux; 1327 1328 if (uca->portno != UCOM_UNK_PORTNO && 1329 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1330 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1331 return (0); 1332 return (config_match(parent, cf, aux)); 1333 } 1334