ucom.c revision 1.103.2.1
1 /* $NetBSD: ucom.c,v 1.103.2.1 2014/04/07 03:37:33 tls 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 1.103.2.1 2014/04/07 03:37:33 tls 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 #include <sys/rnd.h> 54 55 #include <dev/usb/usb.h> 56 57 #include <dev/usb/usbdi.h> 58 #include <dev/usb/usbdi_util.h> 59 #include <dev/usb/usbdevs.h> 60 #include <dev/usb/usb_quirks.h> 61 62 #include <dev/usb/ucomvar.h> 63 64 #include "ucom.h" 65 66 #include "locators.h" 67 68 #if NUCOM > 0 69 70 #ifdef UCOM_DEBUG 71 #define DPRINTFN(n, x) if (ucomdebug > (n)) printf x 72 int ucomdebug = 0; 73 #else 74 #define DPRINTFN(n, x) 75 #endif 76 #define DPRINTF(x) DPRINTFN(0, x) 77 78 #define UCOMUNIT_MASK 0x3ffff 79 #define UCOMDIALOUT_MASK 0x80000 80 #define UCOMCALLUNIT_MASK 0x40000 81 82 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 83 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 84 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 85 86 /* 87 * XXX: We can submit multiple input/output buffers to the usb stack 88 * to improve throughput, but the usb stack is too lame to deal with this 89 * in a number of places. 90 */ 91 #define UCOM_IN_BUFFS 1 92 #define UCOM_OUT_BUFFS 1 93 94 struct ucom_buffer { 95 SIMPLEQ_ENTRY(ucom_buffer) ub_link; 96 usbd_xfer_handle ub_xfer; 97 u_char *ub_data; 98 u_int ub_len; 99 u_int ub_index; 100 }; 101 102 struct ucom_softc { 103 device_t sc_dev; /* base device */ 104 105 usbd_device_handle sc_udev; /* USB device */ 106 107 usbd_interface_handle sc_iface; /* data interface */ 108 109 int sc_bulkin_no; /* bulk in endpoint address */ 110 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 111 u_int sc_ibufsize; /* read buffer size */ 112 u_int sc_ibufsizepad; /* read buffer size padded */ 113 struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; 114 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; 115 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; 116 117 int sc_bulkout_no; /* bulk out endpoint address */ 118 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 119 u_int sc_obufsize; /* write buffer size */ 120 u_int sc_opkthdrlen; /* header length of */ 121 struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; 122 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; 123 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; 124 125 void *sc_si; 126 127 const struct ucom_methods *sc_methods; 128 void *sc_parent; 129 int sc_portno; 130 131 struct tty *sc_tty; /* our tty */ 132 u_char sc_lsr; 133 u_char sc_msr; 134 u_char sc_mcr; 135 volatile u_char sc_rx_stopped; 136 u_char sc_rx_unblock; 137 u_char sc_tx_stopped; 138 int sc_swflags; 139 140 u_char sc_opening; /* lock during open */ 141 int sc_refcnt; 142 u_char sc_dying; /* disconnecting */ 143 144 krndsource_t sc_rndsource; /* random source */ 145 }; 146 147 dev_type_open(ucomopen); 148 dev_type_close(ucomclose); 149 dev_type_read(ucomread); 150 dev_type_write(ucomwrite); 151 dev_type_ioctl(ucomioctl); 152 dev_type_stop(ucomstop); 153 dev_type_tty(ucomtty); 154 dev_type_poll(ucompoll); 155 156 const struct cdevsw ucom_cdevsw = { 157 .d_open = ucomopen, 158 .d_close = ucomclose, 159 .d_read = ucomread, 160 .d_write = ucomwrite, 161 .d_ioctl = ucomioctl, 162 .d_stop = ucomstop, 163 .d_tty = ucomtty, 164 .d_poll = ucompoll, 165 .d_mmap = nommap, 166 .d_kqfilter = ttykqfilter, 167 .d_flag = D_TTY 168 }; 169 170 static void ucom_cleanup(struct ucom_softc *); 171 static int ucomparam(struct tty *, struct termios *); 172 static int ucomhwiflow(struct tty *, int); 173 static void ucomstart(struct tty *); 174 static void ucom_shutdown(struct ucom_softc *); 175 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 176 int, struct lwp *); 177 static void ucom_dtr(struct ucom_softc *, int); 178 static void ucom_rts(struct ucom_softc *, int); 179 static void ucom_break(struct ucom_softc *, int); 180 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 181 static int ucom_to_tiocm(struct ucom_softc *); 182 183 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 184 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 185 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 186 usbd_status); 187 188 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 189 static void ucom_read_complete(struct ucom_softc *); 190 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 191 static void ucom_softintr(void *); 192 193 int ucom_match(device_t, cfdata_t, void *); 194 void ucom_attach(device_t, device_t, void *); 195 int ucom_detach(device_t, int); 196 int ucom_activate(device_t, enum devact); 197 extern struct cfdriver ucom_cd; 198 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 199 ucom_detach, ucom_activate); 200 201 int 202 ucom_match(device_t parent, cfdata_t match, void *aux) 203 { 204 return (1); 205 } 206 207 void 208 ucom_attach(device_t parent, device_t self, void *aux) 209 { 210 struct ucom_softc *sc = device_private(self); 211 struct ucom_attach_args *uca = aux; 212 struct tty *tp; 213 214 if (uca->info != NULL) 215 aprint_normal(": %s", uca->info); 216 aprint_normal("\n"); 217 218 sc->sc_dev = self; 219 sc->sc_udev = uca->device; 220 sc->sc_iface = uca->iface; 221 sc->sc_bulkout_no = uca->bulkout; 222 sc->sc_bulkin_no = uca->bulkin; 223 sc->sc_ibufsize = uca->ibufsize; 224 sc->sc_ibufsizepad = uca->ibufsizepad; 225 sc->sc_obufsize = uca->obufsize; 226 sc->sc_opkthdrlen = uca->opkthdrlen; 227 sc->sc_methods = uca->methods; 228 sc->sc_parent = uca->arg; 229 sc->sc_portno = uca->portno; 230 231 sc->sc_lsr = 0; 232 sc->sc_msr = 0; 233 sc->sc_mcr = 0; 234 sc->sc_tx_stopped = 0; 235 sc->sc_swflags = 0; 236 sc->sc_opening = 0; 237 sc->sc_refcnt = 0; 238 sc->sc_dying = 0; 239 240 sc->sc_si = softint_establish(SOFTINT_NET, ucom_softintr, sc); 241 242 tp = tty_alloc(); 243 tp->t_oproc = ucomstart; 244 tp->t_param = ucomparam; 245 tp->t_hwiflow = ucomhwiflow; 246 sc->sc_tty = tp; 247 248 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 249 tty_attach(tp); 250 251 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 252 RND_TYPE_TTY, RND_FLAG_DEFAULT); 253 254 if (!pmf_device_register(self, NULL, NULL)) 255 aprint_error_dev(self, "couldn't establish power handler\n"); 256 return; 257 } 258 259 int 260 ucom_detach(device_t self, int flags) 261 { 262 struct ucom_softc *sc = device_private(self); 263 struct tty *tp = sc->sc_tty; 264 int maj, mn; 265 int s, i; 266 267 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 268 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 269 270 sc->sc_dying = 1; 271 pmf_device_deregister(self); 272 273 if (sc->sc_bulkin_pipe != NULL) 274 usbd_abort_pipe(sc->sc_bulkin_pipe); 275 if (sc->sc_bulkout_pipe != NULL) 276 usbd_abort_pipe(sc->sc_bulkout_pipe); 277 278 s = splusb(); 279 if (--sc->sc_refcnt >= 0) { 280 /* Wake up anyone waiting */ 281 if (tp != NULL) { 282 mutex_spin_enter(&tty_lock); 283 CLR(tp->t_state, TS_CARR_ON); 284 CLR(tp->t_cflag, CLOCAL | MDMBUF); 285 ttyflush(tp, FREAD|FWRITE); 286 mutex_spin_exit(&tty_lock); 287 } 288 /* Wait for processes to go away. */ 289 usb_detach_waitold(sc->sc_dev); 290 } 291 292 softint_disestablish(sc->sc_si); 293 splx(s); 294 295 /* locate the major number */ 296 maj = cdevsw_lookup_major(&ucom_cdevsw); 297 298 /* Nuke the vnodes for any open instances. */ 299 mn = device_unit(self); 300 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 301 vdevgone(maj, mn, mn, VCHR); 302 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 303 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 304 305 /* Detach and free the tty. */ 306 if (tp != NULL) { 307 tty_detach(tp); 308 tty_free(tp); 309 sc->sc_tty = NULL; 310 } 311 312 for (i = 0; i < UCOM_IN_BUFFS; i++) { 313 if (sc->sc_ibuff[i].ub_xfer != NULL) 314 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 315 } 316 317 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 318 if (sc->sc_obuff[i].ub_xfer != NULL) 319 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 320 } 321 322 /* Detach the random source */ 323 rnd_detach_source(&sc->sc_rndsource); 324 325 return (0); 326 } 327 328 int 329 ucom_activate(device_t self, enum devact act) 330 { 331 struct ucom_softc *sc = device_private(self); 332 333 DPRINTFN(5,("ucom_activate: %d\n", act)); 334 335 switch (act) { 336 case DVACT_DEACTIVATE: 337 sc->sc_dying = 1; 338 return 0; 339 default: 340 return EOPNOTSUPP; 341 } 342 } 343 344 void 345 ucom_shutdown(struct ucom_softc *sc) 346 { 347 struct tty *tp = sc->sc_tty; 348 349 DPRINTF(("ucom_shutdown\n")); 350 /* 351 * Hang up if necessary. Wait a bit, so the other side has time to 352 * notice even if we immediately open the port again. 353 */ 354 if (ISSET(tp->t_cflag, HUPCL)) { 355 ucom_dtr(sc, 0); 356 (void)tsleep(sc, TTIPRI, ttclos, hz); 357 } 358 } 359 360 int 361 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 362 { 363 int unit = UCOMUNIT(dev); 364 usbd_status err; 365 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 366 struct ucom_buffer *ub; 367 struct tty *tp; 368 int s, i; 369 int error; 370 371 /* XXX This is a hopefully temporary stopgap for kern/42848. */ 372 if ((flag & (FREAD|FWRITE)) != (FREAD|FWRITE)) 373 return (EINVAL); 374 375 if (sc == NULL) 376 return (ENXIO); 377 378 if (sc->sc_dying) 379 return (EIO); 380 381 if (!device_is_active(sc->sc_dev)) 382 return (ENXIO); 383 384 tp = sc->sc_tty; 385 386 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 387 388 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 389 return (EBUSY); 390 391 s = spltty(); 392 393 /* 394 * Do the following iff this is a first open. 395 */ 396 while (sc->sc_opening) 397 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 398 399 if (sc->sc_dying) { 400 splx(s); 401 return (EIO); 402 } 403 sc->sc_opening = 1; 404 405 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 406 struct termios t; 407 408 tp->t_dev = dev; 409 410 if (sc->sc_methods->ucom_open != NULL) { 411 error = sc->sc_methods->ucom_open(sc->sc_parent, 412 sc->sc_portno); 413 if (error) { 414 ucom_cleanup(sc); 415 sc->sc_opening = 0; 416 wakeup(&sc->sc_opening); 417 splx(s); 418 return (error); 419 } 420 } 421 422 ucom_status_change(sc); 423 424 /* 425 * Initialize the termios status to the defaults. Add in the 426 * sticky bits from TIOCSFLAGS. 427 */ 428 t.c_ispeed = 0; 429 t.c_ospeed = TTYDEF_SPEED; 430 t.c_cflag = TTYDEF_CFLAG; 431 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 432 SET(t.c_cflag, CLOCAL); 433 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 434 SET(t.c_cflag, CRTSCTS); 435 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 436 SET(t.c_cflag, MDMBUF); 437 /* Make sure ucomparam() will do something. */ 438 tp->t_ospeed = 0; 439 (void) ucomparam(tp, &t); 440 tp->t_iflag = TTYDEF_IFLAG; 441 tp->t_oflag = TTYDEF_OFLAG; 442 tp->t_lflag = TTYDEF_LFLAG; 443 ttychars(tp); 444 ttsetwater(tp); 445 446 /* 447 * Turn on DTR. We must always do this, even if carrier is not 448 * present, because otherwise we'd have to use TIOCSDTR 449 * immediately after setting CLOCAL, which applications do not 450 * expect. We always assert DTR while the device is open 451 * unless explicitly requested to deassert it. Ditto RTS. 452 */ 453 ucom_dtr(sc, 1); 454 ucom_rts(sc, 1); 455 456 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 457 sc->sc_bulkin_no, sc->sc_bulkout_no)); 458 459 /* Open the bulk pipes */ 460 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 461 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 462 if (err) { 463 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 464 device_xname(sc->sc_dev), sc->sc_bulkin_no, 465 usbd_errstr(err))); 466 error = EIO; 467 goto fail_0; 468 } 469 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 470 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 471 if (err) { 472 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 473 device_xname(sc->sc_dev), sc->sc_bulkout_no, 474 usbd_errstr(err))); 475 error = EIO; 476 goto fail_1; 477 } 478 479 sc->sc_rx_unblock = 0; 480 sc->sc_rx_stopped = 0; 481 sc->sc_tx_stopped = 0; 482 483 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 484 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 485 486 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 487 SIMPLEQ_INIT(&sc->sc_ibuff_full); 488 SIMPLEQ_INIT(&sc->sc_obuff_free); 489 SIMPLEQ_INIT(&sc->sc_obuff_full); 490 491 /* Allocate input buffers */ 492 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 493 ub++) { 494 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 495 if (ub->ub_xfer == NULL) { 496 error = ENOMEM; 497 goto fail_2; 498 } 499 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 500 sc->sc_ibufsizepad); 501 if (ub->ub_data == NULL) { 502 error = ENOMEM; 503 goto fail_2; 504 } 505 506 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 507 error = EIO; 508 goto fail_2; 509 } 510 } 511 512 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 513 ub++) { 514 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 515 if (ub->ub_xfer == NULL) { 516 error = ENOMEM; 517 goto fail_2; 518 } 519 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 520 sc->sc_obufsize); 521 if (ub->ub_data == NULL) { 522 error = ENOMEM; 523 goto fail_2; 524 } 525 526 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 527 } 528 529 } 530 sc->sc_opening = 0; 531 wakeup(&sc->sc_opening); 532 splx(s); 533 534 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 535 if (error) 536 goto bad; 537 538 error = (*tp->t_linesw->l_open)(dev, tp); 539 if (error) 540 goto bad; 541 542 return (0); 543 544 fail_2: 545 usbd_abort_pipe(sc->sc_bulkin_pipe); 546 for (i = 0; i < UCOM_IN_BUFFS; i++) { 547 if (sc->sc_ibuff[i].ub_xfer != NULL) { 548 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 549 sc->sc_ibuff[i].ub_xfer = NULL; 550 sc->sc_ibuff[i].ub_data = NULL; 551 } 552 } 553 usbd_abort_pipe(sc->sc_bulkout_pipe); 554 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 555 if (sc->sc_obuff[i].ub_xfer != NULL) { 556 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 557 sc->sc_obuff[i].ub_xfer = NULL; 558 sc->sc_obuff[i].ub_data = NULL; 559 } 560 } 561 562 usbd_close_pipe(sc->sc_bulkout_pipe); 563 sc->sc_bulkout_pipe = NULL; 564 fail_1: 565 usbd_close_pipe(sc->sc_bulkin_pipe); 566 sc->sc_bulkin_pipe = NULL; 567 fail_0: 568 sc->sc_opening = 0; 569 wakeup(&sc->sc_opening); 570 splx(s); 571 return (error); 572 573 bad: 574 s = spltty(); 575 CLR(tp->t_state, TS_BUSY); 576 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 577 /* 578 * We failed to open the device, and nobody else had it opened. 579 * Clean up the state as appropriate. 580 */ 581 ucom_cleanup(sc); 582 } 583 splx(s); 584 585 return (error); 586 } 587 588 int 589 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 590 { 591 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 592 struct tty *tp; 593 int s; 594 595 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 596 597 if (sc == NULL) 598 return 0; 599 600 tp = sc->sc_tty; 601 602 if (!ISSET(tp->t_state, TS_ISOPEN)) 603 return (0); 604 605 s = spltty(); 606 sc->sc_refcnt++; 607 608 (*tp->t_linesw->l_close)(tp, flag); 609 ttyclose(tp); 610 611 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 612 /* 613 * Although we got a last close, the device may still be in 614 * use; e.g. if this was the dialout node, and there are still 615 * processes waiting for carrier on the non-dialout node. 616 */ 617 ucom_cleanup(sc); 618 } 619 620 if (sc->sc_methods->ucom_close != NULL) 621 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 622 623 if (--sc->sc_refcnt < 0) 624 usb_detach_wakeupold(sc->sc_dev); 625 splx(s); 626 627 return (0); 628 } 629 630 int 631 ucomread(dev_t dev, struct uio *uio, int flag) 632 { 633 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 634 struct tty *tp; 635 int error; 636 637 if (sc == NULL || sc->sc_dying) 638 return (EIO); 639 640 tp = sc->sc_tty; 641 642 sc->sc_refcnt++; 643 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 644 if (--sc->sc_refcnt < 0) 645 usb_detach_wakeupold(sc->sc_dev); 646 return (error); 647 } 648 649 int 650 ucomwrite(dev_t dev, struct uio *uio, int flag) 651 { 652 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 653 struct tty *tp; 654 int error; 655 656 if (sc == NULL || sc->sc_dying) 657 return (EIO); 658 659 tp = sc->sc_tty; 660 661 sc->sc_refcnt++; 662 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 663 if (--sc->sc_refcnt < 0) 664 usb_detach_wakeupold(sc->sc_dev); 665 return (error); 666 } 667 668 int 669 ucompoll(dev_t dev, int events, struct lwp *l) 670 { 671 struct ucom_softc *sc; 672 struct tty *tp; 673 int revents; 674 675 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 676 if (sc == NULL || sc->sc_dying) 677 return (POLLHUP); 678 679 tp = sc->sc_tty; 680 681 sc->sc_refcnt++; 682 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 683 if (--sc->sc_refcnt < 0) 684 usb_detach_wakeupold(sc->sc_dev); 685 return (revents); 686 } 687 688 struct tty * 689 ucomtty(dev_t dev) 690 { 691 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 692 693 return ((sc != NULL) ? sc->sc_tty : NULL); 694 } 695 696 int 697 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 698 { 699 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 700 int error; 701 702 if (sc == NULL || sc->sc_dying) 703 return (EIO); 704 705 sc->sc_refcnt++; 706 error = ucom_do_ioctl(sc, cmd, data, flag, l); 707 if (--sc->sc_refcnt < 0) 708 usb_detach_wakeupold(sc->sc_dev); 709 return (error); 710 } 711 712 static int 713 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 714 int flag, struct lwp *l) 715 { 716 struct tty *tp = sc->sc_tty; 717 int error; 718 int s; 719 720 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 721 722 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 723 if (error != EPASSTHROUGH) 724 return (error); 725 726 error = ttioctl(tp, cmd, data, flag, l); 727 if (error != EPASSTHROUGH) 728 return (error); 729 730 if (sc->sc_methods->ucom_ioctl != NULL) { 731 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 732 sc->sc_portno, cmd, data, flag, l->l_proc); 733 if (error != EPASSTHROUGH) 734 return (error); 735 } 736 737 error = 0; 738 739 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 740 s = spltty(); 741 742 switch (cmd) { 743 case TIOCSBRK: 744 ucom_break(sc, 1); 745 break; 746 747 case TIOCCBRK: 748 ucom_break(sc, 0); 749 break; 750 751 case TIOCSDTR: 752 ucom_dtr(sc, 1); 753 break; 754 755 case TIOCCDTR: 756 ucom_dtr(sc, 0); 757 break; 758 759 case TIOCGFLAGS: 760 *(int *)data = sc->sc_swflags; 761 break; 762 763 case TIOCSFLAGS: 764 error = kauth_authorize_device_tty(l->l_cred, 765 KAUTH_DEVICE_TTY_PRIVSET, tp); 766 if (error) 767 break; 768 sc->sc_swflags = *(int *)data; 769 break; 770 771 case TIOCMSET: 772 case TIOCMBIS: 773 case TIOCMBIC: 774 tiocm_to_ucom(sc, cmd, *(int *)data); 775 break; 776 777 case TIOCMGET: 778 *(int *)data = ucom_to_tiocm(sc); 779 break; 780 781 default: 782 error = EPASSTHROUGH; 783 break; 784 } 785 786 splx(s); 787 788 return (error); 789 } 790 791 static void 792 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 793 { 794 u_char combits; 795 796 combits = 0; 797 if (ISSET(ttybits, TIOCM_DTR)) 798 SET(combits, UMCR_DTR); 799 if (ISSET(ttybits, TIOCM_RTS)) 800 SET(combits, UMCR_RTS); 801 802 switch (how) { 803 case TIOCMBIC: 804 CLR(sc->sc_mcr, combits); 805 break; 806 807 case TIOCMBIS: 808 SET(sc->sc_mcr, combits); 809 break; 810 811 case TIOCMSET: 812 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 813 SET(sc->sc_mcr, combits); 814 break; 815 } 816 817 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 818 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 819 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 820 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 821 } 822 823 static int 824 ucom_to_tiocm(struct ucom_softc *sc) 825 { 826 u_char combits; 827 int ttybits = 0; 828 829 combits = sc->sc_mcr; 830 if (ISSET(combits, UMCR_DTR)) 831 SET(ttybits, TIOCM_DTR); 832 if (ISSET(combits, UMCR_RTS)) 833 SET(ttybits, TIOCM_RTS); 834 835 combits = sc->sc_msr; 836 if (ISSET(combits, UMSR_DCD)) 837 SET(ttybits, TIOCM_CD); 838 if (ISSET(combits, UMSR_CTS)) 839 SET(ttybits, TIOCM_CTS); 840 if (ISSET(combits, UMSR_DSR)) 841 SET(ttybits, TIOCM_DSR); 842 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 843 SET(ttybits, TIOCM_RI); 844 845 #if 0 846 XXX; 847 if (sc->sc_ier != 0) 848 SET(ttybits, TIOCM_LE); 849 #endif 850 851 return (ttybits); 852 } 853 854 static void 855 ucom_break(struct ucom_softc *sc, int onoff) 856 { 857 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 858 859 if (sc->sc_methods->ucom_set != NULL) 860 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 861 UCOM_SET_BREAK, onoff); 862 } 863 864 static void 865 ucom_dtr(struct ucom_softc *sc, int onoff) 866 { 867 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 868 869 if (sc->sc_methods->ucom_set != NULL) 870 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 871 UCOM_SET_DTR, onoff); 872 } 873 874 static void 875 ucom_rts(struct ucom_softc *sc, int onoff) 876 { 877 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 878 879 if (sc->sc_methods->ucom_set != NULL) 880 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 881 UCOM_SET_RTS, onoff); 882 } 883 884 void 885 ucom_status_change(struct ucom_softc *sc) 886 { 887 struct tty *tp = sc->sc_tty; 888 u_char old_msr; 889 890 if (sc->sc_methods->ucom_get_status != NULL) { 891 old_msr = sc->sc_msr; 892 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 893 &sc->sc_lsr, &sc->sc_msr); 894 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 895 (*tp->t_linesw->l_modem)(tp, 896 ISSET(sc->sc_msr, UMSR_DCD)); 897 } else { 898 sc->sc_lsr = 0; 899 /* Assume DCD is present, if we have no chance to check it. */ 900 sc->sc_msr = UMSR_DCD; 901 } 902 } 903 904 static int 905 ucomparam(struct tty *tp, struct termios *t) 906 { 907 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 908 UCOMUNIT(tp->t_dev)); 909 int error; 910 911 if (sc == NULL || sc->sc_dying) 912 return (EIO); 913 914 /* Check requested parameters. */ 915 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 916 return (EINVAL); 917 918 /* 919 * For the console, always force CLOCAL and !HUPCL, so that the port 920 * is always active. 921 */ 922 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 923 SET(t->c_cflag, CLOCAL); 924 CLR(t->c_cflag, HUPCL); 925 } 926 927 /* 928 * If there were no changes, don't do anything. This avoids dropping 929 * input and improves performance when all we did was frob things like 930 * VMIN and VTIME. 931 */ 932 if (tp->t_ospeed == t->c_ospeed && 933 tp->t_cflag == t->c_cflag) 934 return (0); 935 936 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 937 938 /* And copy to tty. */ 939 tp->t_ispeed = 0; 940 tp->t_ospeed = t->c_ospeed; 941 tp->t_cflag = t->c_cflag; 942 943 if (sc->sc_methods->ucom_param != NULL) { 944 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 945 t); 946 if (error) 947 return (error); 948 } 949 950 /* XXX worry about CHWFLOW */ 951 952 /* 953 * Update the tty layer's idea of the carrier bit, in case we changed 954 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 955 * explicit request. 956 */ 957 DPRINTF(("ucomparam: l_modem\n")); 958 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 959 960 #if 0 961 XXX what if the hardware is not open 962 if (!ISSET(t->c_cflag, CHWFLOW)) { 963 if (sc->sc_tx_stopped) { 964 sc->sc_tx_stopped = 0; 965 ucomstart(tp); 966 } 967 } 968 #endif 969 970 return (0); 971 } 972 973 static int 974 ucomhwiflow(struct tty *tp, int block) 975 { 976 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 977 UCOMUNIT(tp->t_dev)); 978 int old; 979 980 if (sc == NULL) 981 return (0); 982 983 old = sc->sc_rx_stopped; 984 sc->sc_rx_stopped = (u_char)block; 985 986 if (old && !block) { 987 int s = splusb(); 988 sc->sc_rx_unblock = 1; 989 softint_schedule(sc->sc_si); 990 splx(s); 991 } 992 993 return (1); 994 } 995 996 static void 997 ucomstart(struct tty *tp) 998 { 999 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1000 UCOMUNIT(tp->t_dev)); 1001 struct ucom_buffer *ub; 1002 int s; 1003 u_char *data; 1004 int cnt; 1005 1006 if (sc == NULL || sc->sc_dying) 1007 return; 1008 1009 s = spltty(); 1010 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1011 goto out; 1012 if (sc->sc_tx_stopped) 1013 goto out; 1014 1015 if (!ttypull(tp)) 1016 goto out; 1017 1018 /* Grab the first contiguous region of buffer space. */ 1019 data = tp->t_outq.c_cf; 1020 cnt = ndqb(&tp->t_outq, 0); 1021 1022 if (cnt == 0) 1023 goto out; 1024 1025 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1026 if (ub == NULL) { 1027 SET(tp->t_state, TS_BUSY); 1028 goto out; 1029 } 1030 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1031 1032 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1033 SET(tp->t_state, TS_BUSY); 1034 1035 if (cnt > sc->sc_obufsize) 1036 cnt = sc->sc_obufsize; 1037 1038 if (sc->sc_methods->ucom_write != NULL) 1039 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1040 ub->ub_data, data, &cnt); 1041 else 1042 memcpy(ub->ub_data, data, cnt); 1043 1044 ub->ub_len = cnt; 1045 ub->ub_index = 0; 1046 1047 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1048 1049 softint_schedule(sc->sc_si); 1050 1051 out: 1052 splx(s); 1053 } 1054 1055 void 1056 ucomstop(struct tty *tp, int flag) 1057 { 1058 #if 0 1059 /*struct ucom_softc *sc = 1060 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev));*/ 1061 int s; 1062 1063 s = spltty(); 1064 if (ISSET(tp->t_state, TS_BUSY)) { 1065 /* sc->sc_tx_stopped = 1; */ 1066 if (!ISSET(tp->t_state, TS_TTSTOP)) 1067 SET(tp->t_state, TS_FLUSH); 1068 } 1069 splx(s); 1070 #endif 1071 } 1072 1073 static void 1074 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1075 usbd_status err) 1076 { 1077 struct tty *tp = sc->sc_tty; 1078 uint32_t cc = ub->ub_len; 1079 1080 switch (err) { 1081 case USBD_IN_PROGRESS: 1082 ub->ub_index = ub->ub_len; 1083 break; 1084 case USBD_STALLED: 1085 ub->ub_index = 0; 1086 softint_schedule(sc->sc_si); 1087 break; 1088 case USBD_NORMAL_COMPLETION: 1089 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1090 rnd_add_uint32(&sc->sc_rndsource, cc); 1091 /*FALLTHROUGH*/ 1092 default: 1093 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1094 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1095 cc -= sc->sc_opkthdrlen; 1096 1097 mutex_spin_enter(&tty_lock); 1098 CLR(tp->t_state, TS_BUSY); 1099 if (ISSET(tp->t_state, TS_FLUSH)) 1100 CLR(tp->t_state, TS_FLUSH); 1101 else 1102 ndflush(&tp->t_outq, cc); 1103 mutex_spin_exit(&tty_lock); 1104 1105 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1106 !sc->sc_dying) { 1107 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1108 ucom_submit_write(sc, ub); 1109 1110 (*tp->t_linesw->l_start)(tp); 1111 } 1112 break; 1113 } 1114 } 1115 1116 /* Call at spltty() */ 1117 static void 1118 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1119 { 1120 1121 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkout_pipe, 1122 (usbd_private_handle)sc, ub->ub_data, ub->ub_len, 1123 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 1124 1125 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1126 } 1127 1128 static void 1129 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1130 { 1131 struct ucom_softc *sc = (struct ucom_softc *)p; 1132 int s; 1133 1134 s = spltty(); 1135 1136 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1137 1138 splx(s); 1139 } 1140 1141 static void 1142 ucom_softintr(void *arg) 1143 { 1144 struct ucom_softc *sc = arg; 1145 struct tty *tp = sc->sc_tty; 1146 struct ucom_buffer *ub; 1147 int s; 1148 1149 if (!ISSET(tp->t_state, TS_ISOPEN)) 1150 return; 1151 1152 s = spltty(); 1153 1154 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1155 1156 if (ub != NULL && ub->ub_index == 0) 1157 ucom_submit_write(sc, ub); 1158 1159 if (sc->sc_rx_unblock) 1160 ucom_read_complete(sc); 1161 1162 splx(s); 1163 } 1164 1165 static void 1166 ucom_read_complete(struct ucom_softc *sc) 1167 { 1168 int (*rint)(int, struct tty *); 1169 struct ucom_buffer *ub; 1170 struct tty *tp; 1171 int s; 1172 1173 tp = sc->sc_tty; 1174 rint = tp->t_linesw->l_rint; 1175 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1176 1177 while (ub != NULL && !sc->sc_rx_stopped) { 1178 1179 s = spltty(); 1180 1181 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1182 /* Give characters to tty layer. */ 1183 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1184 /* Overflow: drop remainder */ 1185 ub->ub_index = ub->ub_len; 1186 } else 1187 ub->ub_index++; 1188 } 1189 1190 splx(s); 1191 1192 if (ub->ub_index == ub->ub_len) { 1193 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1194 1195 ucomsubmitread(sc, ub); 1196 1197 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1198 } 1199 } 1200 1201 sc->sc_rx_unblock = (ub != NULL); 1202 } 1203 1204 static usbd_status 1205 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1206 { 1207 usbd_status err; 1208 1209 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkin_pipe, 1210 (usbd_private_handle)sc, ub->ub_data, sc->sc_ibufsize, 1211 USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, ucomreadcb); 1212 1213 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1214 /* XXX: Recover from this, please! */ 1215 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1216 return (err); 1217 } 1218 1219 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1220 1221 return (USBD_NORMAL_COMPLETION); 1222 } 1223 1224 static void 1225 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1226 { 1227 struct ucom_softc *sc = (struct ucom_softc *)p; 1228 struct tty *tp = sc->sc_tty; 1229 struct ucom_buffer *ub; 1230 u_int32_t cc; 1231 u_char *cp; 1232 int s; 1233 1234 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1235 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1236 1237 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1238 sc->sc_dying) { 1239 DPRINTF(("ucomreadcb: dying\n")); 1240 ub->ub_index = ub->ub_len = 0; 1241 /* Send something to wake upper layer */ 1242 s = spltty(); 1243 if (status != USBD_CANCELLED) { 1244 (tp->t_linesw->l_rint)('\n', tp); 1245 mutex_spin_enter(&tty_lock); /* XXX */ 1246 ttwakeup(tp); 1247 mutex_spin_exit(&tty_lock); /* XXX */ 1248 } 1249 splx(s); 1250 return; 1251 } 1252 1253 if (status == USBD_STALLED) { 1254 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1255 ucomsubmitread(sc, ub); 1256 return; 1257 } 1258 1259 if (status != USBD_NORMAL_COMPLETION) { 1260 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1261 return; 1262 } 1263 1264 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1265 1266 #ifdef UCOM_DEBUG 1267 /* This is triggered by uslsa(4) occasionally. */ 1268 if ((ucomdebug > 0) && (cc == 0)) { 1269 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1270 } 1271 #endif 1272 1273 KDASSERT(cp == ub->ub_data); 1274 1275 rnd_add_uint32(&sc->sc_rndsource, cc); 1276 1277 if (sc->sc_opening) { 1278 ucomsubmitread(sc, ub); 1279 return; 1280 } 1281 1282 if (sc->sc_methods->ucom_read != NULL) { 1283 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1284 &cp, &cc); 1285 ub->ub_index = (u_int)(cp - ub->ub_data); 1286 } else 1287 ub->ub_index = 0; 1288 1289 ub->ub_len = cc; 1290 1291 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1292 1293 ucom_read_complete(sc); 1294 } 1295 1296 static void 1297 ucom_cleanup(struct ucom_softc *sc) 1298 { 1299 struct ucom_buffer *ub; 1300 1301 DPRINTF(("ucom_cleanup: closing pipes\n")); 1302 1303 ucom_shutdown(sc); 1304 if (sc->sc_bulkin_pipe != NULL) { 1305 usbd_abort_pipe(sc->sc_bulkin_pipe); 1306 usbd_close_pipe(sc->sc_bulkin_pipe); 1307 sc->sc_bulkin_pipe = NULL; 1308 } 1309 if (sc->sc_bulkout_pipe != NULL) { 1310 usbd_abort_pipe(sc->sc_bulkout_pipe); 1311 usbd_close_pipe(sc->sc_bulkout_pipe); 1312 sc->sc_bulkout_pipe = NULL; 1313 } 1314 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; ub++) { 1315 if (ub->ub_xfer != NULL) { 1316 usbd_free_xfer(ub->ub_xfer); 1317 ub->ub_xfer = NULL; 1318 ub->ub_data = NULL; 1319 } 1320 } 1321 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; ub++){ 1322 if (ub->ub_xfer != NULL) { 1323 usbd_free_xfer(ub->ub_xfer); 1324 ub->ub_xfer = NULL; 1325 ub->ub_data = NULL; 1326 } 1327 } 1328 } 1329 1330 #endif /* NUCOM > 0 */ 1331 1332 int 1333 ucomprint(void *aux, const char *pnp) 1334 { 1335 struct ucom_attach_args *uca = aux; 1336 1337 if (pnp) 1338 aprint_normal("ucom at %s", pnp); 1339 if (uca->portno != UCOM_UNK_PORTNO) 1340 aprint_normal(" portno %d", uca->portno); 1341 return (UNCONF); 1342 } 1343 1344 int 1345 ucomsubmatch(device_t parent, cfdata_t cf, 1346 const int *ldesc, void *aux) 1347 { 1348 struct ucom_attach_args *uca = aux; 1349 1350 if (uca->portno != UCOM_UNK_PORTNO && 1351 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1352 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1353 return (0); 1354 return (config_match(parent, cf, aux)); 1355 } 1356
Indexes created Sun Oct 19 02:09:48 GMT 2025