ucom.c revision 1.88.2.1
1 /* $NetBSD: ucom.c,v 1.88.2.1 2012/02/18 07:35:08 mrg 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 (at) 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 1.88.2.1 2012/02/18 07:35:08 mrg 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 <sys/rnd.h> 55 #endif 56 57 #include <dev/usb/usb.h> 58 59 #include <dev/usb/usbdi.h> 60 #include <dev/usb/usbdi_util.h> 61 #include <dev/usb/usbdevs.h> 62 #include <dev/usb/usb_quirks.h> 63 64 #include <dev/usb/ucomvar.h> 65 66 #include "ucom.h" 67 68 #include "locators.h" 69 70 #if NUCOM > 0 71 72 #ifdef UCOM_DEBUG 73 #define DPRINTFN(n, x) if (ucomdebug > (n)) printf x 74 int ucomdebug = 0; 75 #else 76 #define DPRINTFN(n, x) 77 #endif 78 #define DPRINTF(x) DPRINTFN(0, x) 79 80 #define UCOMUNIT_MASK 0x3ffff 81 #define UCOMDIALOUT_MASK 0x80000 82 #define UCOMCALLUNIT_MASK 0x40000 83 84 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 85 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 86 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 87 88 /* 89 * XXX: We can submit multiple input/output buffers to the usb stack 90 * to improve throughput, but the usb stack is too lame to deal with this 91 * in a number of places. 92 */ 93 #define UCOM_IN_BUFFS 1 94 #define UCOM_OUT_BUFFS 1 95 96 struct ucom_buffer { 97 SIMPLEQ_ENTRY(ucom_buffer) ub_link; 98 usbd_xfer_handle ub_xfer; 99 u_char *ub_data; 100 u_int ub_len; 101 u_int ub_index; 102 }; 103 104 struct ucom_softc { 105 device_t sc_dev; /* base device */ 106 107 usbd_device_handle sc_udev; /* USB device */ 108 109 usbd_interface_handle sc_iface; /* data interface */ 110 111 int sc_bulkin_no; /* bulk in endpoint address */ 112 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 113 u_int sc_ibufsize; /* read buffer size */ 114 u_int sc_ibufsizepad; /* read buffer size padded */ 115 struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; 116 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; 117 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; 118 119 int sc_bulkout_no; /* bulk out endpoint address */ 120 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 121 u_int sc_obufsize; /* write buffer size */ 122 u_int sc_opkthdrlen; /* header length of */ 123 struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; 124 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; 125 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; 126 127 void *sc_si; 128 129 const struct ucom_methods *sc_methods; 130 void *sc_parent; 131 int sc_portno; 132 133 struct tty *sc_tty; /* our tty */ 134 u_char sc_lsr; 135 u_char sc_msr; 136 u_char sc_mcr; 137 volatile u_char sc_rx_stopped; 138 u_char sc_rx_unblock; 139 u_char sc_tx_stopped; 140 int sc_swflags; 141 142 u_char sc_opening; /* lock during open */ 143 int sc_refcnt; 144 u_char sc_dying; /* disconnecting */ 145 146 krndsource_t sc_rndsource; /* random source */ 147 }; 148 149 dev_type_open(ucomopen); 150 dev_type_close(ucomclose); 151 dev_type_read(ucomread); 152 dev_type_write(ucomwrite); 153 dev_type_ioctl(ucomioctl); 154 dev_type_stop(ucomstop); 155 dev_type_tty(ucomtty); 156 dev_type_poll(ucompoll); 157 158 const struct cdevsw ucom_cdevsw = { 159 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 160 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 161 }; 162 163 static void ucom_cleanup(struct ucom_softc *); 164 static int ucomparam(struct tty *, struct termios *); 165 static int ucomhwiflow(struct tty *, int); 166 static void ucomstart(struct tty *); 167 static void ucom_shutdown(struct ucom_softc *); 168 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 169 int, struct lwp *); 170 static void ucom_dtr(struct ucom_softc *, int); 171 static void ucom_rts(struct ucom_softc *, int); 172 static void ucom_break(struct ucom_softc *, int); 173 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 174 static int ucom_to_tiocm(struct ucom_softc *); 175 176 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 177 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 178 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 179 usbd_status); 180 181 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 182 static void ucom_read_complete(struct ucom_softc *); 183 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 184 static void ucom_softintr(void *); 185 186 int ucom_match(device_t, cfdata_t, void *); 187 void ucom_attach(device_t, device_t, void *); 188 int ucom_detach(device_t, int); 189 int ucom_activate(device_t, enum devact); 190 extern struct cfdriver ucom_cd; 191 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 192 ucom_detach, ucom_activate); 193 194 int 195 ucom_match(device_t parent, cfdata_t match, void *aux) 196 { 197 return (1); 198 } 199 200 void 201 ucom_attach(device_t parent, device_t self, void *aux) 202 { 203 struct ucom_softc *sc = device_private(self); 204 struct ucom_attach_args *uca = aux; 205 struct tty *tp; 206 207 if (uca->info != NULL) 208 aprint_normal(": %s", uca->info); 209 aprint_normal("\n"); 210 211 sc->sc_dev = self; 212 sc->sc_udev = uca->device; 213 sc->sc_iface = uca->iface; 214 sc->sc_bulkout_no = uca->bulkout; 215 sc->sc_bulkin_no = uca->bulkin; 216 sc->sc_ibufsize = uca->ibufsize; 217 sc->sc_ibufsizepad = uca->ibufsizepad; 218 sc->sc_obufsize = uca->obufsize; 219 sc->sc_opkthdrlen = uca->opkthdrlen; 220 sc->sc_methods = uca->methods; 221 sc->sc_parent = uca->arg; 222 sc->sc_portno = uca->portno; 223 224 sc->sc_lsr = 0; 225 sc->sc_msr = 0; 226 sc->sc_mcr = 0; 227 sc->sc_tx_stopped = 0; 228 sc->sc_swflags = 0; 229 sc->sc_opening = 0; 230 sc->sc_refcnt = 0; 231 sc->sc_dying = 0; 232 233 sc->sc_si = softint_establish(SOFTINT_NET, ucom_softintr, sc); 234 235 tp = tty_alloc(); 236 tp->t_oproc = ucomstart; 237 tp->t_param = ucomparam; 238 tp->t_hwiflow = ucomhwiflow; 239 sc->sc_tty = tp; 240 241 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 242 tty_attach(tp); 243 244 #if defined(__NetBSD__) 245 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 246 RND_TYPE_TTY, 0); 247 #endif 248 249 if (!pmf_device_register(self, NULL, NULL)) 250 aprint_error_dev(self, "couldn't establish power handler\n"); 251 return; 252 } 253 254 int 255 ucom_detach(device_t self, int flags) 256 { 257 struct ucom_softc *sc = device_private(self); 258 struct tty *tp = sc->sc_tty; 259 int maj, mn; 260 int s, i; 261 262 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 263 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 264 265 sc->sc_dying = 1; 266 pmf_device_deregister(self); 267 268 if (sc->sc_bulkin_pipe != NULL) 269 usbd_abort_pipe(sc->sc_bulkin_pipe); 270 if (sc->sc_bulkout_pipe != NULL) 271 usbd_abort_pipe(sc->sc_bulkout_pipe); 272 273 s = splusb(); 274 if (--sc->sc_refcnt >= 0) { 275 /* Wake up anyone waiting */ 276 if (tp != NULL) { 277 mutex_spin_enter(&tty_lock); 278 CLR(tp->t_state, TS_CARR_ON); 279 CLR(tp->t_cflag, CLOCAL | MDMBUF); 280 ttyflush(tp, FREAD|FWRITE); 281 mutex_spin_exit(&tty_lock); 282 } 283 /* Wait for processes to go away. */ 284 usb_detach_wait(sc->sc_dev); 285 } 286 287 softint_disestablish(sc->sc_si); 288 splx(s); 289 290 /* locate the major number */ 291 maj = cdevsw_lookup_major(&ucom_cdevsw); 292 293 /* Nuke the vnodes for any open instances. */ 294 mn = device_unit(self); 295 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 296 vdevgone(maj, mn, mn, VCHR); 297 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 298 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 299 300 /* Detach and free the tty. */ 301 if (tp != NULL) { 302 tty_detach(tp); 303 tty_free(tp); 304 sc->sc_tty = NULL; 305 } 306 307 for (i = 0; i < UCOM_IN_BUFFS; i++) { 308 if (sc->sc_ibuff[i].ub_xfer != NULL) 309 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 310 } 311 312 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 313 if (sc->sc_obuff[i].ub_xfer != NULL) 314 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 315 } 316 317 /* Detach the random source */ 318 #if defined(__NetBSD__) 319 rnd_detach_source(&sc->sc_rndsource); 320 #endif 321 322 return (0); 323 } 324 325 int 326 ucom_activate(device_t self, enum devact act) 327 { 328 struct ucom_softc *sc = device_private(self); 329 330 DPRINTFN(5,("ucom_activate: %d\n", act)); 331 332 switch (act) { 333 case DVACT_DEACTIVATE: 334 sc->sc_dying = 1; 335 return 0; 336 default: 337 return EOPNOTSUPP; 338 } 339 } 340 341 void 342 ucom_shutdown(struct ucom_softc *sc) 343 { 344 struct tty *tp = sc->sc_tty; 345 346 DPRINTF(("ucom_shutdown\n")); 347 /* 348 * Hang up if necessary. Wait a bit, so the other side has time to 349 * notice even if we immediately open the port again. 350 */ 351 if (ISSET(tp->t_cflag, HUPCL)) { 352 ucom_dtr(sc, 0); 353 (void)tsleep(sc, TTIPRI, ttclos, hz); 354 } 355 } 356 357 int 358 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 359 { 360 int unit = UCOMUNIT(dev); 361 usbd_status err; 362 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 363 struct ucom_buffer *ub; 364 struct tty *tp; 365 int s, i; 366 int error; 367 368 /* XXX This is a hopefully temporary stopgap for kern/42848. */ 369 if ((flag & (FREAD|FWRITE)) != (FREAD|FWRITE)) 370 return (EINVAL); 371 372 if (sc == NULL) 373 return (ENXIO); 374 375 if (sc->sc_dying) 376 return (EIO); 377 378 if (!device_is_active(sc->sc_dev)) 379 return (ENXIO); 380 381 tp = sc->sc_tty; 382 383 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 384 385 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 386 return (EBUSY); 387 388 s = spltty(); 389 390 /* 391 * Do the following iff this is a first open. 392 */ 393 while (sc->sc_opening) 394 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 395 396 if (sc->sc_dying) { 397 splx(s); 398 return (EIO); 399 } 400 sc->sc_opening = 1; 401 402 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 403 struct termios t; 404 405 tp->t_dev = dev; 406 407 if (sc->sc_methods->ucom_open != NULL) { 408 error = sc->sc_methods->ucom_open(sc->sc_parent, 409 sc->sc_portno); 410 if (error) { 411 ucom_cleanup(sc); 412 sc->sc_opening = 0; 413 wakeup(&sc->sc_opening); 414 splx(s); 415 return (error); 416 } 417 } 418 419 ucom_status_change(sc); 420 421 /* 422 * Initialize the termios status to the defaults. Add in the 423 * sticky bits from TIOCSFLAGS. 424 */ 425 t.c_ispeed = 0; 426 t.c_ospeed = TTYDEF_SPEED; 427 t.c_cflag = TTYDEF_CFLAG; 428 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 429 SET(t.c_cflag, CLOCAL); 430 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 431 SET(t.c_cflag, CRTSCTS); 432 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 433 SET(t.c_cflag, MDMBUF); 434 /* Make sure ucomparam() will do something. */ 435 tp->t_ospeed = 0; 436 (void) ucomparam(tp, &t); 437 tp->t_iflag = TTYDEF_IFLAG; 438 tp->t_oflag = TTYDEF_OFLAG; 439 tp->t_lflag = TTYDEF_LFLAG; 440 ttychars(tp); 441 ttsetwater(tp); 442 443 /* 444 * Turn on DTR. We must always do this, even if carrier is not 445 * present, because otherwise we'd have to use TIOCSDTR 446 * immediately after setting CLOCAL, which applications do not 447 * expect. We always assert DTR while the device is open 448 * unless explicitly requested to deassert it. Ditto RTS. 449 */ 450 ucom_dtr(sc, 1); 451 ucom_rts(sc, 1); 452 453 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 454 sc->sc_bulkin_no, sc->sc_bulkout_no)); 455 456 /* Open the bulk pipes */ 457 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 458 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 459 if (err) { 460 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 461 device_xname(sc->sc_dev), sc->sc_bulkin_no, 462 usbd_errstr(err))); 463 error = EIO; 464 goto fail_0; 465 } 466 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 467 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 468 if (err) { 469 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 470 device_xname(sc->sc_dev), sc->sc_bulkout_no, 471 usbd_errstr(err))); 472 error = EIO; 473 goto fail_1; 474 } 475 476 sc->sc_rx_unblock = 0; 477 sc->sc_rx_stopped = 0; 478 sc->sc_tx_stopped = 0; 479 480 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 481 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 482 483 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 484 SIMPLEQ_INIT(&sc->sc_ibuff_full); 485 SIMPLEQ_INIT(&sc->sc_obuff_free); 486 SIMPLEQ_INIT(&sc->sc_obuff_full); 487 488 /* Allocate input buffers */ 489 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 490 ub++) { 491 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 492 if (ub->ub_xfer == NULL) { 493 error = ENOMEM; 494 goto fail_2; 495 } 496 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 497 sc->sc_ibufsizepad); 498 if (ub->ub_data == NULL) { 499 error = ENOMEM; 500 goto fail_2; 501 } 502 503 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 504 error = EIO; 505 goto fail_2; 506 } 507 } 508 509 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 510 ub++) { 511 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 512 if (ub->ub_xfer == NULL) { 513 error = ENOMEM; 514 goto fail_2; 515 } 516 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 517 sc->sc_obufsize); 518 if (ub->ub_data == NULL) { 519 error = ENOMEM; 520 goto fail_2; 521 } 522 523 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 524 } 525 526 } 527 sc->sc_opening = 0; 528 wakeup(&sc->sc_opening); 529 splx(s); 530 531 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 532 if (error) 533 goto bad; 534 535 error = (*tp->t_linesw->l_open)(dev, tp); 536 if (error) 537 goto bad; 538 539 return (0); 540 541 fail_2: 542 usbd_abort_pipe(sc->sc_bulkin_pipe); 543 for (i = 0; i < UCOM_IN_BUFFS; i++) { 544 if (sc->sc_ibuff[i].ub_xfer != NULL) { 545 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 546 sc->sc_ibuff[i].ub_xfer = NULL; 547 sc->sc_ibuff[i].ub_data = NULL; 548 } 549 } 550 usbd_abort_pipe(sc->sc_bulkout_pipe); 551 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 552 if (sc->sc_obuff[i].ub_xfer != NULL) { 553 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 554 sc->sc_obuff[i].ub_xfer = NULL; 555 sc->sc_obuff[i].ub_data = NULL; 556 } 557 } 558 559 usbd_close_pipe(sc->sc_bulkout_pipe); 560 sc->sc_bulkout_pipe = NULL; 561 fail_1: 562 usbd_close_pipe(sc->sc_bulkin_pipe); 563 sc->sc_bulkin_pipe = NULL; 564 fail_0: 565 sc->sc_opening = 0; 566 wakeup(&sc->sc_opening); 567 splx(s); 568 return (error); 569 570 bad: 571 s = spltty(); 572 CLR(tp->t_state, TS_BUSY); 573 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 574 /* 575 * We failed to open the device, and nobody else had it opened. 576 * Clean up the state as appropriate. 577 */ 578 ucom_cleanup(sc); 579 } 580 splx(s); 581 582 return (error); 583 } 584 585 int 586 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 587 { 588 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 589 struct tty *tp = sc->sc_tty; 590 int s; 591 592 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 593 if (!ISSET(tp->t_state, TS_ISOPEN)) 594 return (0); 595 596 s = spltty(); 597 sc->sc_refcnt++; 598 599 (*tp->t_linesw->l_close)(tp, flag); 600 ttyclose(tp); 601 602 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 603 /* 604 * Although we got a last close, the device may still be in 605 * use; e.g. if this was the dialout node, and there are still 606 * processes waiting for carrier on the non-dialout node. 607 */ 608 ucom_cleanup(sc); 609 } 610 611 if (sc->sc_methods->ucom_close != NULL) 612 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 613 614 if (--sc->sc_refcnt < 0) 615 usb_detach_wakeup(sc->sc_dev); 616 splx(s); 617 618 return (0); 619 } 620 621 int 622 ucomread(dev_t dev, struct uio *uio, int flag) 623 { 624 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 625 struct tty *tp = sc->sc_tty; 626 int error; 627 628 if (sc->sc_dying) 629 return (EIO); 630 631 sc->sc_refcnt++; 632 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 633 if (--sc->sc_refcnt < 0) 634 usb_detach_wakeup(sc->sc_dev); 635 return (error); 636 } 637 638 int 639 ucomwrite(dev_t dev, struct uio *uio, int flag) 640 { 641 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 642 struct tty *tp = sc->sc_tty; 643 int error; 644 645 if (sc->sc_dying) 646 return (EIO); 647 648 sc->sc_refcnt++; 649 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 650 if (--sc->sc_refcnt < 0) 651 usb_detach_wakeup(sc->sc_dev); 652 return (error); 653 } 654 655 int 656 ucompoll(dev_t dev, int events, struct lwp *l) 657 { 658 struct ucom_softc *sc; 659 struct tty *tp; 660 int revents; 661 662 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 663 if (sc == NULL || sc->sc_dying) 664 return (POLLHUP); 665 666 tp = sc->sc_tty; 667 668 sc->sc_refcnt++; 669 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 670 if (--sc->sc_refcnt < 0) 671 usb_detach_wakeup(sc->sc_dev); 672 return (revents); 673 } 674 675 struct tty * 676 ucomtty(dev_t dev) 677 { 678 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 679 struct tty *tp = sc->sc_tty; 680 681 return (tp); 682 } 683 684 int 685 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 686 { 687 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 688 int error; 689 690 sc->sc_refcnt++; 691 error = ucom_do_ioctl(sc, cmd, data, flag, l); 692 if (--sc->sc_refcnt < 0) 693 usb_detach_wakeup(sc->sc_dev); 694 return (error); 695 } 696 697 static int 698 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 699 int flag, struct lwp *l) 700 { 701 struct tty *tp = sc->sc_tty; 702 int error; 703 int s; 704 705 if (sc->sc_dying) 706 return (EIO); 707 708 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 709 710 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 711 if (error != EPASSTHROUGH) 712 return (error); 713 714 error = ttioctl(tp, cmd, data, flag, l); 715 if (error != EPASSTHROUGH) 716 return (error); 717 718 if (sc->sc_methods->ucom_ioctl != NULL) { 719 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 720 sc->sc_portno, cmd, data, flag, l->l_proc); 721 if (error != EPASSTHROUGH) 722 return (error); 723 } 724 725 error = 0; 726 727 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 728 s = spltty(); 729 730 switch (cmd) { 731 case TIOCSBRK: 732 ucom_break(sc, 1); 733 break; 734 735 case TIOCCBRK: 736 ucom_break(sc, 0); 737 break; 738 739 case TIOCSDTR: 740 ucom_dtr(sc, 1); 741 break; 742 743 case TIOCCDTR: 744 ucom_dtr(sc, 0); 745 break; 746 747 case TIOCGFLAGS: 748 *(int *)data = sc->sc_swflags; 749 break; 750 751 case TIOCSFLAGS: 752 error = kauth_authorize_device_tty(l->l_cred, 753 KAUTH_DEVICE_TTY_PRIVSET, tp); 754 if (error) 755 break; 756 sc->sc_swflags = *(int *)data; 757 break; 758 759 case TIOCMSET: 760 case TIOCMBIS: 761 case TIOCMBIC: 762 tiocm_to_ucom(sc, cmd, *(int *)data); 763 break; 764 765 case TIOCMGET: 766 *(int *)data = ucom_to_tiocm(sc); 767 break; 768 769 default: 770 error = EPASSTHROUGH; 771 break; 772 } 773 774 splx(s); 775 776 return (error); 777 } 778 779 static void 780 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 781 { 782 u_char combits; 783 784 combits = 0; 785 if (ISSET(ttybits, TIOCM_DTR)) 786 SET(combits, UMCR_DTR); 787 if (ISSET(ttybits, TIOCM_RTS)) 788 SET(combits, UMCR_RTS); 789 790 switch (how) { 791 case TIOCMBIC: 792 CLR(sc->sc_mcr, combits); 793 break; 794 795 case TIOCMBIS: 796 SET(sc->sc_mcr, combits); 797 break; 798 799 case TIOCMSET: 800 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 801 SET(sc->sc_mcr, combits); 802 break; 803 } 804 805 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 806 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 807 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 808 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 809 } 810 811 static int 812 ucom_to_tiocm(struct ucom_softc *sc) 813 { 814 u_char combits; 815 int ttybits = 0; 816 817 combits = sc->sc_mcr; 818 if (ISSET(combits, UMCR_DTR)) 819 SET(ttybits, TIOCM_DTR); 820 if (ISSET(combits, UMCR_RTS)) 821 SET(ttybits, TIOCM_RTS); 822 823 combits = sc->sc_msr; 824 if (ISSET(combits, UMSR_DCD)) 825 SET(ttybits, TIOCM_CD); 826 if (ISSET(combits, UMSR_CTS)) 827 SET(ttybits, TIOCM_CTS); 828 if (ISSET(combits, UMSR_DSR)) 829 SET(ttybits, TIOCM_DSR); 830 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 831 SET(ttybits, TIOCM_RI); 832 833 #if 0 834 XXX; 835 if (sc->sc_ier != 0) 836 SET(ttybits, TIOCM_LE); 837 #endif 838 839 return (ttybits); 840 } 841 842 static void 843 ucom_break(struct ucom_softc *sc, int onoff) 844 { 845 DPRINTF(("ucom_break: 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_BREAK, onoff); 850 } 851 852 static void 853 ucom_dtr(struct ucom_softc *sc, int onoff) 854 { 855 DPRINTF(("ucom_dtr: 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_DTR, onoff); 860 } 861 862 static void 863 ucom_rts(struct ucom_softc *sc, int onoff) 864 { 865 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 866 867 if (sc->sc_methods->ucom_set != NULL) 868 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 869 UCOM_SET_RTS, onoff); 870 } 871 872 void 873 ucom_status_change(struct ucom_softc *sc) 874 { 875 struct tty *tp = sc->sc_tty; 876 u_char old_msr; 877 878 if (sc->sc_methods->ucom_get_status != NULL) { 879 old_msr = sc->sc_msr; 880 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 881 &sc->sc_lsr, &sc->sc_msr); 882 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 883 (*tp->t_linesw->l_modem)(tp, 884 ISSET(sc->sc_msr, UMSR_DCD)); 885 } else { 886 sc->sc_lsr = 0; 887 /* Assume DCD is present, if we have no chance to check it. */ 888 sc->sc_msr = UMSR_DCD; 889 } 890 } 891 892 static int 893 ucomparam(struct tty *tp, struct termios *t) 894 { 895 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 896 UCOMUNIT(tp->t_dev)); 897 int error; 898 899 if (sc->sc_dying) 900 return (EIO); 901 902 /* Check requested parameters. */ 903 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 904 return (EINVAL); 905 906 /* 907 * For the console, always force CLOCAL and !HUPCL, so that the port 908 * is always active. 909 */ 910 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 911 SET(t->c_cflag, CLOCAL); 912 CLR(t->c_cflag, HUPCL); 913 } 914 915 /* 916 * If there were no changes, don't do anything. This avoids dropping 917 * input and improves performance when all we did was frob things like 918 * VMIN and VTIME. 919 */ 920 if (tp->t_ospeed == t->c_ospeed && 921 tp->t_cflag == t->c_cflag) 922 return (0); 923 924 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 925 926 /* And copy to tty. */ 927 tp->t_ispeed = 0; 928 tp->t_ospeed = t->c_ospeed; 929 tp->t_cflag = t->c_cflag; 930 931 if (sc->sc_methods->ucom_param != NULL) { 932 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 933 t); 934 if (error) 935 return (error); 936 } 937 938 /* XXX worry about CHWFLOW */ 939 940 /* 941 * Update the tty layer's idea of the carrier bit, in case we changed 942 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 943 * explicit request. 944 */ 945 DPRINTF(("ucomparam: l_modem\n")); 946 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 947 948 #if 0 949 XXX what if the hardware is not open 950 if (!ISSET(t->c_cflag, CHWFLOW)) { 951 if (sc->sc_tx_stopped) { 952 sc->sc_tx_stopped = 0; 953 ucomstart(tp); 954 } 955 } 956 #endif 957 958 return (0); 959 } 960 961 static int 962 ucomhwiflow(struct tty *tp, int block) 963 { 964 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 965 UCOMUNIT(tp->t_dev)); 966 int old; 967 968 old = sc->sc_rx_stopped; 969 sc->sc_rx_stopped = (u_char)block; 970 971 if (old && !block) { 972 int s = splusb(); 973 sc->sc_rx_unblock = 1; 974 softint_schedule(sc->sc_si); 975 splx(s); 976 } 977 978 return (1); 979 } 980 981 static void 982 ucomstart(struct tty *tp) 983 { 984 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 985 UCOMUNIT(tp->t_dev)); 986 struct ucom_buffer *ub; 987 int s; 988 u_char *data; 989 int cnt; 990 991 if (sc->sc_dying) 992 return; 993 994 s = spltty(); 995 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 996 goto out; 997 if (sc->sc_tx_stopped) 998 goto out; 999 1000 if (!ttypull(tp)) 1001 goto out; 1002 1003 /* Grab the first contiguous region of buffer space. */ 1004 data = tp->t_outq.c_cf; 1005 cnt = ndqb(&tp->t_outq, 0); 1006 1007 if (cnt == 0) 1008 goto out; 1009 1010 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1011 KASSERT(ub != NULL); 1012 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1013 1014 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1015 SET(tp->t_state, TS_BUSY); 1016 1017 if (cnt > sc->sc_obufsize) 1018 cnt = sc->sc_obufsize; 1019 1020 if (sc->sc_methods->ucom_write != NULL) 1021 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1022 ub->ub_data, data, &cnt); 1023 else 1024 memcpy(ub->ub_data, data, cnt); 1025 1026 ub->ub_len = cnt; 1027 ub->ub_index = 0; 1028 1029 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1030 1031 softint_schedule(sc->sc_si); 1032 1033 out: 1034 splx(s); 1035 } 1036 1037 void 1038 ucomstop(struct tty *tp, int flag) 1039 { 1040 #if 0 1041 /*struct ucom_softc *sc = 1042 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev));*/ 1043 int s; 1044 1045 s = spltty(); 1046 if (ISSET(tp->t_state, TS_BUSY)) { 1047 /* sc->sc_tx_stopped = 1; */ 1048 if (!ISSET(tp->t_state, TS_TTSTOP)) 1049 SET(tp->t_state, TS_FLUSH); 1050 } 1051 splx(s); 1052 #endif 1053 } 1054 1055 static void 1056 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1057 usbd_status err) 1058 { 1059 struct tty *tp = sc->sc_tty; 1060 uint32_t cc = ub->ub_len; 1061 1062 switch (err) { 1063 case USBD_IN_PROGRESS: 1064 ub->ub_index = ub->ub_len; 1065 break; 1066 case USBD_STALLED: 1067 ub->ub_index = 0; 1068 softint_schedule(sc->sc_si); 1069 break; 1070 case USBD_NORMAL_COMPLETION: 1071 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1072 #if defined(__NetBSD__) 1073 rnd_add_uint32(&sc->sc_rndsource, cc); 1074 #endif 1075 /*FALLTHROUGH*/ 1076 default: 1077 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1078 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1079 cc -= sc->sc_opkthdrlen; 1080 1081 CLR(tp->t_state, TS_BUSY); 1082 if (ISSET(tp->t_state, TS_FLUSH)) 1083 CLR(tp->t_state, TS_FLUSH); 1084 else 1085 ndflush(&tp->t_outq, cc); 1086 1087 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1088 !sc->sc_dying) { 1089 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1090 ucom_submit_write(sc, ub); 1091 1092 (*tp->t_linesw->l_start)(tp); 1093 } 1094 break; 1095 } 1096 } 1097 1098 /* Call at spltty() */ 1099 static void 1100 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1101 { 1102 1103 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkout_pipe, 1104 (usbd_private_handle)sc, ub->ub_data, ub->ub_len, 1105 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 1106 1107 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1108 } 1109 1110 static void 1111 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1112 { 1113 struct ucom_softc *sc = (struct ucom_softc *)p; 1114 int s; 1115 1116 s = spltty(); 1117 1118 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1119 1120 splx(s); 1121 } 1122 1123 static void 1124 ucom_softintr(void *arg) 1125 { 1126 struct ucom_softc *sc = arg; 1127 struct tty *tp = sc->sc_tty; 1128 struct ucom_buffer *ub; 1129 int s; 1130 1131 if (!ISSET(tp->t_state, TS_ISOPEN)) 1132 return; 1133 1134 s = spltty(); 1135 1136 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1137 1138 if (ub != NULL && ub->ub_index == 0) 1139 ucom_submit_write(sc, ub); 1140 1141 if (sc->sc_rx_unblock) 1142 ucom_read_complete(sc); 1143 1144 splx(s); 1145 } 1146 1147 static void 1148 ucom_read_complete(struct ucom_softc *sc) 1149 { 1150 int (*rint)(int, struct tty *); 1151 struct ucom_buffer *ub; 1152 struct tty *tp; 1153 int s; 1154 1155 tp = sc->sc_tty; 1156 rint = tp->t_linesw->l_rint; 1157 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1158 1159 while (ub != NULL && !sc->sc_rx_stopped) { 1160 1161 s = spltty(); 1162 1163 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1164 /* Give characters to tty layer. */ 1165 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1166 /* Overflow: drop remainder */ 1167 ub->ub_index = ub->ub_len; 1168 } else 1169 ub->ub_index++; 1170 } 1171 1172 splx(s); 1173 1174 if (ub->ub_index == ub->ub_len) { 1175 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1176 1177 ucomsubmitread(sc, ub); 1178 1179 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1180 } 1181 } 1182 1183 sc->sc_rx_unblock = (ub != NULL); 1184 } 1185 1186 static usbd_status 1187 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1188 { 1189 usbd_status err; 1190 1191 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkin_pipe, 1192 (usbd_private_handle)sc, ub->ub_data, sc->sc_ibufsize, 1193 USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, ucomreadcb); 1194 1195 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1196 /* XXX: Recover from this, please! */ 1197 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1198 return (err); 1199 } 1200 1201 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1202 1203 return (USBD_NORMAL_COMPLETION); 1204 } 1205 1206 static void 1207 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1208 { 1209 struct ucom_softc *sc = (struct ucom_softc *)p; 1210 struct tty *tp = sc->sc_tty; 1211 struct ucom_buffer *ub; 1212 u_int32_t cc; 1213 u_char *cp; 1214 int s; 1215 1216 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1217 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1218 1219 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1220 sc->sc_dying) { 1221 DPRINTF(("ucomreadcb: dying\n")); 1222 ub->ub_index = ub->ub_len = 0; 1223 /* Send something to wake upper layer */ 1224 s = spltty(); 1225 if (status != USBD_CANCELLED) { 1226 (tp->t_linesw->l_rint)('\n', tp); 1227 mutex_spin_enter(&tty_lock); /* XXX */ 1228 ttwakeup(tp); 1229 mutex_spin_exit(&tty_lock); /* XXX */ 1230 } 1231 splx(s); 1232 return; 1233 } 1234 1235 if (status == USBD_STALLED) { 1236 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1237 ucomsubmitread(sc, ub); 1238 return; 1239 } 1240 1241 if (status != USBD_NORMAL_COMPLETION) { 1242 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1243 return; 1244 } 1245 1246 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1247 1248 #ifdef UCOM_DEBUG 1249 /* This is triggered by uslsa(4) occasionally. */ 1250 if ((ucomdebug > 0) && (cc == 0)) { 1251 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1252 } 1253 #endif 1254 1255 KDASSERT(cp == ub->ub_data); 1256 1257 #if defined(__NetBSD__) 1258 rnd_add_uint32(&sc->sc_rndsource, cc); 1259 #endif 1260 1261 if (sc->sc_opening) { 1262 ucomsubmitread(sc, ub); 1263 return; 1264 } 1265 1266 if (sc->sc_methods->ucom_read != NULL) { 1267 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1268 &cp, &cc); 1269 ub->ub_index = (u_int)(cp - ub->ub_data); 1270 } else 1271 ub->ub_index = 0; 1272 1273 ub->ub_len = cc; 1274 1275 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1276 1277 ucom_read_complete(sc); 1278 } 1279 1280 static void 1281 ucom_cleanup(struct ucom_softc *sc) 1282 { 1283 struct ucom_buffer *ub; 1284 1285 DPRINTF(("ucom_cleanup: closing pipes\n")); 1286 1287 ucom_shutdown(sc); 1288 if (sc->sc_bulkin_pipe != NULL) { 1289 usbd_abort_pipe(sc->sc_bulkin_pipe); 1290 usbd_close_pipe(sc->sc_bulkin_pipe); 1291 sc->sc_bulkin_pipe = NULL; 1292 } 1293 if (sc->sc_bulkout_pipe != NULL) { 1294 usbd_abort_pipe(sc->sc_bulkout_pipe); 1295 usbd_close_pipe(sc->sc_bulkout_pipe); 1296 sc->sc_bulkout_pipe = NULL; 1297 } 1298 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; ub++) { 1299 if (ub->ub_xfer != NULL) { 1300 usbd_free_xfer(ub->ub_xfer); 1301 ub->ub_xfer = NULL; 1302 ub->ub_data = NULL; 1303 } 1304 } 1305 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; ub++){ 1306 if (ub->ub_xfer != NULL) { 1307 usbd_free_xfer(ub->ub_xfer); 1308 ub->ub_xfer = NULL; 1309 ub->ub_data = NULL; 1310 } 1311 } 1312 } 1313 1314 #endif /* NUCOM > 0 */ 1315 1316 int 1317 ucomprint(void *aux, const char *pnp) 1318 { 1319 struct ucom_attach_args *uca = aux; 1320 1321 if (pnp) 1322 aprint_normal("ucom at %s", pnp); 1323 if (uca->portno != UCOM_UNK_PORTNO) 1324 aprint_normal(" portno %d", uca->portno); 1325 return (UNCONF); 1326 } 1327 1328 int 1329 ucomsubmatch(device_t parent, cfdata_t cf, 1330 const int *ldesc, void *aux) 1331 { 1332 struct ucom_attach_args *uca = aux; 1333 1334 if (uca->portno != UCOM_UNK_PORTNO && 1335 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1336 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1337 return (0); 1338 return (config_match(parent, cf, aux)); 1339 } 1340
Indexes created Wed Oct 22 13:09:56 GMT 2025