ucom.c revision 1.87.4.2
1 /* $NetBSD: ucom.c,v 1.87.4.2 2012/10/30 17:22:08 yamt 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 1.87.4.2 2012/10/30 17:22:08 yamt 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 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 158 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 159 }; 160 161 static void ucom_cleanup(struct ucom_softc *); 162 static int ucomparam(struct tty *, struct termios *); 163 static int ucomhwiflow(struct tty *, int); 164 static void ucomstart(struct tty *); 165 static void ucom_shutdown(struct ucom_softc *); 166 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 167 int, struct lwp *); 168 static void ucom_dtr(struct ucom_softc *, int); 169 static void ucom_rts(struct ucom_softc *, int); 170 static void ucom_break(struct ucom_softc *, int); 171 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 172 static int ucom_to_tiocm(struct ucom_softc *); 173 174 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 175 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 176 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 177 usbd_status); 178 179 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 180 static void ucom_read_complete(struct ucom_softc *); 181 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 182 static void ucom_softintr(void *); 183 184 int ucom_match(device_t, cfdata_t, void *); 185 void ucom_attach(device_t, device_t, void *); 186 int ucom_detach(device_t, int); 187 int ucom_activate(device_t, enum devact); 188 extern struct cfdriver ucom_cd; 189 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 190 ucom_detach, ucom_activate); 191 192 int 193 ucom_match(device_t parent, cfdata_t match, void *aux) 194 { 195 return (1); 196 } 197 198 void 199 ucom_attach(device_t parent, device_t self, void *aux) 200 { 201 struct ucom_softc *sc = device_private(self); 202 struct ucom_attach_args *uca = aux; 203 struct tty *tp; 204 205 if (uca->info != NULL) 206 aprint_normal(": %s", uca->info); 207 aprint_normal("\n"); 208 209 sc->sc_dev = self; 210 sc->sc_udev = uca->device; 211 sc->sc_iface = uca->iface; 212 sc->sc_bulkout_no = uca->bulkout; 213 sc->sc_bulkin_no = uca->bulkin; 214 sc->sc_ibufsize = uca->ibufsize; 215 sc->sc_ibufsizepad = uca->ibufsizepad; 216 sc->sc_obufsize = uca->obufsize; 217 sc->sc_opkthdrlen = uca->opkthdrlen; 218 sc->sc_methods = uca->methods; 219 sc->sc_parent = uca->arg; 220 sc->sc_portno = uca->portno; 221 222 sc->sc_lsr = 0; 223 sc->sc_msr = 0; 224 sc->sc_mcr = 0; 225 sc->sc_tx_stopped = 0; 226 sc->sc_swflags = 0; 227 sc->sc_opening = 0; 228 sc->sc_refcnt = 0; 229 sc->sc_dying = 0; 230 231 sc->sc_si = softint_establish(SOFTINT_NET, ucom_softintr, sc); 232 233 tp = tty_alloc(); 234 tp->t_oproc = ucomstart; 235 tp->t_param = ucomparam; 236 tp->t_hwiflow = ucomhwiflow; 237 sc->sc_tty = tp; 238 239 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 240 tty_attach(tp); 241 242 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 243 RND_TYPE_TTY, 0); 244 245 if (!pmf_device_register(self, NULL, NULL)) 246 aprint_error_dev(self, "couldn't establish power handler\n"); 247 return; 248 } 249 250 int 251 ucom_detach(device_t self, int flags) 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_waitold(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 tty_free(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 rnd_detach_source(&sc->sc_rndsource); 315 316 return (0); 317 } 318 319 int 320 ucom_activate(device_t self, enum devact act) 321 { 322 struct ucom_softc *sc = device_private(self); 323 324 DPRINTFN(5,("ucom_activate: %d\n", act)); 325 326 switch (act) { 327 case DVACT_DEACTIVATE: 328 sc->sc_dying = 1; 329 return 0; 330 default: 331 return EOPNOTSUPP; 332 } 333 } 334 335 void 336 ucom_shutdown(struct ucom_softc *sc) 337 { 338 struct tty *tp = sc->sc_tty; 339 340 DPRINTF(("ucom_shutdown\n")); 341 /* 342 * Hang up if necessary. Wait a bit, so the other side has time to 343 * notice even if we immediately open the port again. 344 */ 345 if (ISSET(tp->t_cflag, HUPCL)) { 346 ucom_dtr(sc, 0); 347 (void)tsleep(sc, TTIPRI, ttclos, hz); 348 } 349 } 350 351 int 352 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 353 { 354 int unit = UCOMUNIT(dev); 355 usbd_status err; 356 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 357 struct ucom_buffer *ub; 358 struct tty *tp; 359 int s, i; 360 int error; 361 362 /* XXX This is a hopefully temporary stopgap for kern/42848. */ 363 if ((flag & (FREAD|FWRITE)) != (FREAD|FWRITE)) 364 return (EINVAL); 365 366 if (sc == NULL) 367 return (ENXIO); 368 369 if (sc->sc_dying) 370 return (EIO); 371 372 if (!device_is_active(sc->sc_dev)) 373 return (ENXIO); 374 375 tp = sc->sc_tty; 376 377 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 378 379 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 380 return (EBUSY); 381 382 s = spltty(); 383 384 /* 385 * Do the following iff this is a first open. 386 */ 387 while (sc->sc_opening) 388 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 389 390 if (sc->sc_dying) { 391 splx(s); 392 return (EIO); 393 } 394 sc->sc_opening = 1; 395 396 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 397 struct termios t; 398 399 tp->t_dev = dev; 400 401 if (sc->sc_methods->ucom_open != NULL) { 402 error = sc->sc_methods->ucom_open(sc->sc_parent, 403 sc->sc_portno); 404 if (error) { 405 ucom_cleanup(sc); 406 sc->sc_opening = 0; 407 wakeup(&sc->sc_opening); 408 splx(s); 409 return (error); 410 } 411 } 412 413 ucom_status_change(sc); 414 415 /* 416 * Initialize the termios status to the defaults. Add in the 417 * sticky bits from TIOCSFLAGS. 418 */ 419 t.c_ispeed = 0; 420 t.c_ospeed = TTYDEF_SPEED; 421 t.c_cflag = TTYDEF_CFLAG; 422 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 423 SET(t.c_cflag, CLOCAL); 424 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 425 SET(t.c_cflag, CRTSCTS); 426 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 427 SET(t.c_cflag, MDMBUF); 428 /* Make sure ucomparam() will do something. */ 429 tp->t_ospeed = 0; 430 (void) ucomparam(tp, &t); 431 tp->t_iflag = TTYDEF_IFLAG; 432 tp->t_oflag = TTYDEF_OFLAG; 433 tp->t_lflag = TTYDEF_LFLAG; 434 ttychars(tp); 435 ttsetwater(tp); 436 437 /* 438 * Turn on DTR. We must always do this, even if carrier is not 439 * present, because otherwise we'd have to use TIOCSDTR 440 * immediately after setting CLOCAL, which applications do not 441 * expect. We always assert DTR while the device is open 442 * unless explicitly requested to deassert it. Ditto RTS. 443 */ 444 ucom_dtr(sc, 1); 445 ucom_rts(sc, 1); 446 447 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 448 sc->sc_bulkin_no, sc->sc_bulkout_no)); 449 450 /* Open the bulk pipes */ 451 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 452 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 453 if (err) { 454 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 455 device_xname(sc->sc_dev), sc->sc_bulkin_no, 456 usbd_errstr(err))); 457 error = EIO; 458 goto fail_0; 459 } 460 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 461 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 462 if (err) { 463 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 464 device_xname(sc->sc_dev), sc->sc_bulkout_no, 465 usbd_errstr(err))); 466 error = EIO; 467 goto fail_1; 468 } 469 470 sc->sc_rx_unblock = 0; 471 sc->sc_rx_stopped = 0; 472 sc->sc_tx_stopped = 0; 473 474 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 475 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 476 477 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 478 SIMPLEQ_INIT(&sc->sc_ibuff_full); 479 SIMPLEQ_INIT(&sc->sc_obuff_free); 480 SIMPLEQ_INIT(&sc->sc_obuff_full); 481 482 /* Allocate input buffers */ 483 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 484 ub++) { 485 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 486 if (ub->ub_xfer == NULL) { 487 error = ENOMEM; 488 goto fail_2; 489 } 490 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 491 sc->sc_ibufsizepad); 492 if (ub->ub_data == NULL) { 493 error = ENOMEM; 494 goto fail_2; 495 } 496 497 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 498 error = EIO; 499 goto fail_2; 500 } 501 } 502 503 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 504 ub++) { 505 ub->ub_xfer = usbd_alloc_xfer(sc->sc_udev); 506 if (ub->ub_xfer == NULL) { 507 error = ENOMEM; 508 goto fail_2; 509 } 510 ub->ub_data = usbd_alloc_buffer(ub->ub_xfer, 511 sc->sc_obufsize); 512 if (ub->ub_data == NULL) { 513 error = ENOMEM; 514 goto fail_2; 515 } 516 517 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 518 } 519 520 } 521 sc->sc_opening = 0; 522 wakeup(&sc->sc_opening); 523 splx(s); 524 525 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 526 if (error) 527 goto bad; 528 529 error = (*tp->t_linesw->l_open)(dev, tp); 530 if (error) 531 goto bad; 532 533 return (0); 534 535 fail_2: 536 usbd_abort_pipe(sc->sc_bulkin_pipe); 537 for (i = 0; i < UCOM_IN_BUFFS; i++) { 538 if (sc->sc_ibuff[i].ub_xfer != NULL) { 539 usbd_free_xfer(sc->sc_ibuff[i].ub_xfer); 540 sc->sc_ibuff[i].ub_xfer = NULL; 541 sc->sc_ibuff[i].ub_data = NULL; 542 } 543 } 544 usbd_abort_pipe(sc->sc_bulkout_pipe); 545 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 546 if (sc->sc_obuff[i].ub_xfer != NULL) { 547 usbd_free_xfer(sc->sc_obuff[i].ub_xfer); 548 sc->sc_obuff[i].ub_xfer = NULL; 549 sc->sc_obuff[i].ub_data = NULL; 550 } 551 } 552 553 usbd_close_pipe(sc->sc_bulkout_pipe); 554 sc->sc_bulkout_pipe = NULL; 555 fail_1: 556 usbd_close_pipe(sc->sc_bulkin_pipe); 557 sc->sc_bulkin_pipe = NULL; 558 fail_0: 559 sc->sc_opening = 0; 560 wakeup(&sc->sc_opening); 561 splx(s); 562 return (error); 563 564 bad: 565 s = spltty(); 566 CLR(tp->t_state, TS_BUSY); 567 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 568 /* 569 * We failed to open the device, and nobody else had it opened. 570 * Clean up the state as appropriate. 571 */ 572 ucom_cleanup(sc); 573 } 574 splx(s); 575 576 return (error); 577 } 578 579 int 580 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 581 { 582 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 583 struct tty *tp = sc->sc_tty; 584 int s; 585 586 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 587 if (!ISSET(tp->t_state, TS_ISOPEN)) 588 return (0); 589 590 s = spltty(); 591 sc->sc_refcnt++; 592 593 (*tp->t_linesw->l_close)(tp, flag); 594 ttyclose(tp); 595 596 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 597 /* 598 * Although we got a last close, the device may still be in 599 * use; e.g. if this was the dialout node, and there are still 600 * processes waiting for carrier on the non-dialout node. 601 */ 602 ucom_cleanup(sc); 603 } 604 605 if (sc->sc_methods->ucom_close != NULL) 606 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 607 608 if (--sc->sc_refcnt < 0) 609 usb_detach_wakeupold(sc->sc_dev); 610 splx(s); 611 612 return (0); 613 } 614 615 int 616 ucomread(dev_t dev, struct uio *uio, int flag) 617 { 618 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 619 struct tty *tp = sc->sc_tty; 620 int error; 621 622 if (sc->sc_dying) 623 return (EIO); 624 625 sc->sc_refcnt++; 626 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 627 if (--sc->sc_refcnt < 0) 628 usb_detach_wakeupold(sc->sc_dev); 629 return (error); 630 } 631 632 int 633 ucomwrite(dev_t dev, struct uio *uio, int flag) 634 { 635 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 636 struct tty *tp = sc->sc_tty; 637 int error; 638 639 if (sc->sc_dying) 640 return (EIO); 641 642 sc->sc_refcnt++; 643 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 644 if (--sc->sc_refcnt < 0) 645 usb_detach_wakeupold(sc->sc_dev); 646 return (error); 647 } 648 649 int 650 ucompoll(dev_t dev, int events, struct lwp *l) 651 { 652 struct ucom_softc *sc; 653 struct tty *tp; 654 int revents; 655 656 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 657 if (sc == NULL || sc->sc_dying) 658 return (POLLHUP); 659 660 tp = sc->sc_tty; 661 662 sc->sc_refcnt++; 663 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 664 if (--sc->sc_refcnt < 0) 665 usb_detach_wakeupold(sc->sc_dev); 666 return (revents); 667 } 668 669 struct tty * 670 ucomtty(dev_t dev) 671 { 672 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 673 struct tty *tp = sc->sc_tty; 674 675 return (tp); 676 } 677 678 int 679 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 680 { 681 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 682 int error; 683 684 sc->sc_refcnt++; 685 error = ucom_do_ioctl(sc, cmd, data, flag, l); 686 if (--sc->sc_refcnt < 0) 687 usb_detach_wakeupold(sc->sc_dev); 688 return (error); 689 } 690 691 static int 692 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 693 int flag, struct lwp *l) 694 { 695 struct tty *tp = sc->sc_tty; 696 int error; 697 int s; 698 699 if (sc->sc_dying) 700 return (EIO); 701 702 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 703 704 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 705 if (error != EPASSTHROUGH) 706 return (error); 707 708 error = ttioctl(tp, cmd, data, flag, l); 709 if (error != EPASSTHROUGH) 710 return (error); 711 712 if (sc->sc_methods->ucom_ioctl != NULL) { 713 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 714 sc->sc_portno, cmd, data, flag, l->l_proc); 715 if (error != EPASSTHROUGH) 716 return (error); 717 } 718 719 error = 0; 720 721 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 722 s = spltty(); 723 724 switch (cmd) { 725 case TIOCSBRK: 726 ucom_break(sc, 1); 727 break; 728 729 case TIOCCBRK: 730 ucom_break(sc, 0); 731 break; 732 733 case TIOCSDTR: 734 ucom_dtr(sc, 1); 735 break; 736 737 case TIOCCDTR: 738 ucom_dtr(sc, 0); 739 break; 740 741 case TIOCGFLAGS: 742 *(int *)data = sc->sc_swflags; 743 break; 744 745 case TIOCSFLAGS: 746 error = kauth_authorize_device_tty(l->l_cred, 747 KAUTH_DEVICE_TTY_PRIVSET, tp); 748 if (error) 749 break; 750 sc->sc_swflags = *(int *)data; 751 break; 752 753 case TIOCMSET: 754 case TIOCMBIS: 755 case TIOCMBIC: 756 tiocm_to_ucom(sc, cmd, *(int *)data); 757 break; 758 759 case TIOCMGET: 760 *(int *)data = ucom_to_tiocm(sc); 761 break; 762 763 default: 764 error = EPASSTHROUGH; 765 break; 766 } 767 768 splx(s); 769 770 return (error); 771 } 772 773 static void 774 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 775 { 776 u_char combits; 777 778 combits = 0; 779 if (ISSET(ttybits, TIOCM_DTR)) 780 SET(combits, UMCR_DTR); 781 if (ISSET(ttybits, TIOCM_RTS)) 782 SET(combits, UMCR_RTS); 783 784 switch (how) { 785 case TIOCMBIC: 786 CLR(sc->sc_mcr, combits); 787 break; 788 789 case TIOCMBIS: 790 SET(sc->sc_mcr, combits); 791 break; 792 793 case TIOCMSET: 794 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 795 SET(sc->sc_mcr, combits); 796 break; 797 } 798 799 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 800 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 801 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 802 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 803 } 804 805 static int 806 ucom_to_tiocm(struct ucom_softc *sc) 807 { 808 u_char combits; 809 int ttybits = 0; 810 811 combits = sc->sc_mcr; 812 if (ISSET(combits, UMCR_DTR)) 813 SET(ttybits, TIOCM_DTR); 814 if (ISSET(combits, UMCR_RTS)) 815 SET(ttybits, TIOCM_RTS); 816 817 combits = sc->sc_msr; 818 if (ISSET(combits, UMSR_DCD)) 819 SET(ttybits, TIOCM_CD); 820 if (ISSET(combits, UMSR_CTS)) 821 SET(ttybits, TIOCM_CTS); 822 if (ISSET(combits, UMSR_DSR)) 823 SET(ttybits, TIOCM_DSR); 824 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 825 SET(ttybits, TIOCM_RI); 826 827 #if 0 828 XXX; 829 if (sc->sc_ier != 0) 830 SET(ttybits, TIOCM_LE); 831 #endif 832 833 return (ttybits); 834 } 835 836 static void 837 ucom_break(struct ucom_softc *sc, int onoff) 838 { 839 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 840 841 if (sc->sc_methods->ucom_set != NULL) 842 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 843 UCOM_SET_BREAK, onoff); 844 } 845 846 static void 847 ucom_dtr(struct ucom_softc *sc, int onoff) 848 { 849 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 850 851 if (sc->sc_methods->ucom_set != NULL) 852 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 853 UCOM_SET_DTR, onoff); 854 } 855 856 static void 857 ucom_rts(struct ucom_softc *sc, int onoff) 858 { 859 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 860 861 if (sc->sc_methods->ucom_set != NULL) 862 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 863 UCOM_SET_RTS, onoff); 864 } 865 866 void 867 ucom_status_change(struct ucom_softc *sc) 868 { 869 struct tty *tp = sc->sc_tty; 870 u_char old_msr; 871 872 if (sc->sc_methods->ucom_get_status != NULL) { 873 old_msr = sc->sc_msr; 874 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 875 &sc->sc_lsr, &sc->sc_msr); 876 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 877 (*tp->t_linesw->l_modem)(tp, 878 ISSET(sc->sc_msr, UMSR_DCD)); 879 } else { 880 sc->sc_lsr = 0; 881 /* Assume DCD is present, if we have no chance to check it. */ 882 sc->sc_msr = UMSR_DCD; 883 } 884 } 885 886 static int 887 ucomparam(struct tty *tp, struct termios *t) 888 { 889 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 890 UCOMUNIT(tp->t_dev)); 891 int error; 892 893 if (sc->sc_dying) 894 return (EIO); 895 896 /* Check requested parameters. */ 897 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 898 return (EINVAL); 899 900 /* 901 * For the console, always force CLOCAL and !HUPCL, so that the port 902 * is always active. 903 */ 904 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 905 SET(t->c_cflag, CLOCAL); 906 CLR(t->c_cflag, HUPCL); 907 } 908 909 /* 910 * If there were no changes, don't do anything. This avoids dropping 911 * input and improves performance when all we did was frob things like 912 * VMIN and VTIME. 913 */ 914 if (tp->t_ospeed == t->c_ospeed && 915 tp->t_cflag == t->c_cflag) 916 return (0); 917 918 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 919 920 /* And copy to tty. */ 921 tp->t_ispeed = 0; 922 tp->t_ospeed = t->c_ospeed; 923 tp->t_cflag = t->c_cflag; 924 925 if (sc->sc_methods->ucom_param != NULL) { 926 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 927 t); 928 if (error) 929 return (error); 930 } 931 932 /* XXX worry about CHWFLOW */ 933 934 /* 935 * Update the tty layer's idea of the carrier bit, in case we changed 936 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 937 * explicit request. 938 */ 939 DPRINTF(("ucomparam: l_modem\n")); 940 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 941 942 #if 0 943 XXX what if the hardware is not open 944 if (!ISSET(t->c_cflag, CHWFLOW)) { 945 if (sc->sc_tx_stopped) { 946 sc->sc_tx_stopped = 0; 947 ucomstart(tp); 948 } 949 } 950 #endif 951 952 return (0); 953 } 954 955 static int 956 ucomhwiflow(struct tty *tp, int block) 957 { 958 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 959 UCOMUNIT(tp->t_dev)); 960 int old; 961 962 old = sc->sc_rx_stopped; 963 sc->sc_rx_stopped = (u_char)block; 964 965 if (old && !block) { 966 int s = splusb(); 967 sc->sc_rx_unblock = 1; 968 softint_schedule(sc->sc_si); 969 splx(s); 970 } 971 972 return (1); 973 } 974 975 static void 976 ucomstart(struct tty *tp) 977 { 978 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 979 UCOMUNIT(tp->t_dev)); 980 struct ucom_buffer *ub; 981 int s; 982 u_char *data; 983 int cnt; 984 985 if (sc->sc_dying) 986 return; 987 988 s = spltty(); 989 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 990 goto out; 991 if (sc->sc_tx_stopped) 992 goto out; 993 994 if (!ttypull(tp)) 995 goto out; 996 997 /* Grab the first contiguous region of buffer space. */ 998 data = tp->t_outq.c_cf; 999 cnt = ndqb(&tp->t_outq, 0); 1000 1001 if (cnt == 0) 1002 goto out; 1003 1004 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1005 if (ub == NULL) { 1006 SET(tp->t_state, TS_BUSY); 1007 goto out; 1008 } 1009 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1010 1011 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1012 SET(tp->t_state, TS_BUSY); 1013 1014 if (cnt > sc->sc_obufsize) 1015 cnt = sc->sc_obufsize; 1016 1017 if (sc->sc_methods->ucom_write != NULL) 1018 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1019 ub->ub_data, data, &cnt); 1020 else 1021 memcpy(ub->ub_data, data, cnt); 1022 1023 ub->ub_len = cnt; 1024 ub->ub_index = 0; 1025 1026 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1027 1028 softint_schedule(sc->sc_si); 1029 1030 out: 1031 splx(s); 1032 } 1033 1034 void 1035 ucomstop(struct tty *tp, int flag) 1036 { 1037 #if 0 1038 /*struct ucom_softc *sc = 1039 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev));*/ 1040 int s; 1041 1042 s = spltty(); 1043 if (ISSET(tp->t_state, TS_BUSY)) { 1044 /* sc->sc_tx_stopped = 1; */ 1045 if (!ISSET(tp->t_state, TS_TTSTOP)) 1046 SET(tp->t_state, TS_FLUSH); 1047 } 1048 splx(s); 1049 #endif 1050 } 1051 1052 static void 1053 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1054 usbd_status err) 1055 { 1056 struct tty *tp = sc->sc_tty; 1057 uint32_t cc = ub->ub_len; 1058 1059 switch (err) { 1060 case USBD_IN_PROGRESS: 1061 ub->ub_index = ub->ub_len; 1062 break; 1063 case USBD_STALLED: 1064 ub->ub_index = 0; 1065 softint_schedule(sc->sc_si); 1066 break; 1067 case USBD_NORMAL_COMPLETION: 1068 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1069 rnd_add_uint32(&sc->sc_rndsource, cc); 1070 /*FALLTHROUGH*/ 1071 default: 1072 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1073 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1074 cc -= sc->sc_opkthdrlen; 1075 1076 mutex_spin_enter(&tty_lock); 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 mutex_spin_exit(&tty_lock); 1083 1084 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1085 !sc->sc_dying) { 1086 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1087 ucom_submit_write(sc, ub); 1088 1089 (*tp->t_linesw->l_start)(tp); 1090 } 1091 break; 1092 } 1093 } 1094 1095 /* Call at spltty() */ 1096 static void 1097 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1098 { 1099 1100 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkout_pipe, 1101 (usbd_private_handle)sc, ub->ub_data, ub->ub_len, 1102 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 1103 1104 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1105 } 1106 1107 static void 1108 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1109 { 1110 struct ucom_softc *sc = (struct ucom_softc *)p; 1111 int s; 1112 1113 s = spltty(); 1114 1115 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1116 1117 splx(s); 1118 } 1119 1120 static void 1121 ucom_softintr(void *arg) 1122 { 1123 struct ucom_softc *sc = arg; 1124 struct tty *tp = sc->sc_tty; 1125 struct ucom_buffer *ub; 1126 int s; 1127 1128 if (!ISSET(tp->t_state, TS_ISOPEN)) 1129 return; 1130 1131 s = spltty(); 1132 1133 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1134 1135 if (ub != NULL && ub->ub_index == 0) 1136 ucom_submit_write(sc, ub); 1137 1138 if (sc->sc_rx_unblock) 1139 ucom_read_complete(sc); 1140 1141 splx(s); 1142 } 1143 1144 static void 1145 ucom_read_complete(struct ucom_softc *sc) 1146 { 1147 int (*rint)(int, struct tty *); 1148 struct ucom_buffer *ub; 1149 struct tty *tp; 1150 int s; 1151 1152 tp = sc->sc_tty; 1153 rint = tp->t_linesw->l_rint; 1154 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1155 1156 while (ub != NULL && !sc->sc_rx_stopped) { 1157 1158 s = spltty(); 1159 1160 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1161 /* Give characters to tty layer. */ 1162 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1163 /* Overflow: drop remainder */ 1164 ub->ub_index = ub->ub_len; 1165 } else 1166 ub->ub_index++; 1167 } 1168 1169 splx(s); 1170 1171 if (ub->ub_index == ub->ub_len) { 1172 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1173 1174 ucomsubmitread(sc, ub); 1175 1176 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1177 } 1178 } 1179 1180 sc->sc_rx_unblock = (ub != NULL); 1181 } 1182 1183 static usbd_status 1184 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1185 { 1186 usbd_status err; 1187 1188 usbd_setup_xfer(ub->ub_xfer, sc->sc_bulkin_pipe, 1189 (usbd_private_handle)sc, ub->ub_data, sc->sc_ibufsize, 1190 USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, ucomreadcb); 1191 1192 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1193 /* XXX: Recover from this, please! */ 1194 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1195 return (err); 1196 } 1197 1198 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1199 1200 return (USBD_NORMAL_COMPLETION); 1201 } 1202 1203 static void 1204 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1205 { 1206 struct ucom_softc *sc = (struct ucom_softc *)p; 1207 struct tty *tp = sc->sc_tty; 1208 struct ucom_buffer *ub; 1209 u_int32_t cc; 1210 u_char *cp; 1211 int s; 1212 1213 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1214 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1215 1216 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1217 sc->sc_dying) { 1218 DPRINTF(("ucomreadcb: dying\n")); 1219 ub->ub_index = ub->ub_len = 0; 1220 /* Send something to wake upper layer */ 1221 s = spltty(); 1222 if (status != USBD_CANCELLED) { 1223 (tp->t_linesw->l_rint)('\n', tp); 1224 mutex_spin_enter(&tty_lock); /* XXX */ 1225 ttwakeup(tp); 1226 mutex_spin_exit(&tty_lock); /* XXX */ 1227 } 1228 splx(s); 1229 return; 1230 } 1231 1232 if (status == USBD_STALLED) { 1233 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1234 ucomsubmitread(sc, ub); 1235 return; 1236 } 1237 1238 if (status != USBD_NORMAL_COMPLETION) { 1239 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1240 return; 1241 } 1242 1243 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1244 1245 #ifdef UCOM_DEBUG 1246 /* This is triggered by uslsa(4) occasionally. */ 1247 if ((ucomdebug > 0) && (cc == 0)) { 1248 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1249 } 1250 #endif 1251 1252 KDASSERT(cp == ub->ub_data); 1253 1254 rnd_add_uint32(&sc->sc_rndsource, cc); 1255 1256 if (sc->sc_opening) { 1257 ucomsubmitread(sc, ub); 1258 return; 1259 } 1260 1261 if (sc->sc_methods->ucom_read != NULL) { 1262 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1263 &cp, &cc); 1264 ub->ub_index = (u_int)(cp - ub->ub_data); 1265 } else 1266 ub->ub_index = 0; 1267 1268 ub->ub_len = cc; 1269 1270 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1271 1272 ucom_read_complete(sc); 1273 } 1274 1275 static void 1276 ucom_cleanup(struct ucom_softc *sc) 1277 { 1278 struct ucom_buffer *ub; 1279 1280 DPRINTF(("ucom_cleanup: closing pipes\n")); 1281 1282 ucom_shutdown(sc); 1283 if (sc->sc_bulkin_pipe != NULL) { 1284 usbd_abort_pipe(sc->sc_bulkin_pipe); 1285 usbd_close_pipe(sc->sc_bulkin_pipe); 1286 sc->sc_bulkin_pipe = NULL; 1287 } 1288 if (sc->sc_bulkout_pipe != NULL) { 1289 usbd_abort_pipe(sc->sc_bulkout_pipe); 1290 usbd_close_pipe(sc->sc_bulkout_pipe); 1291 sc->sc_bulkout_pipe = NULL; 1292 } 1293 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; ub++) { 1294 if (ub->ub_xfer != NULL) { 1295 usbd_free_xfer(ub->ub_xfer); 1296 ub->ub_xfer = NULL; 1297 ub->ub_data = NULL; 1298 } 1299 } 1300 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; ub++){ 1301 if (ub->ub_xfer != NULL) { 1302 usbd_free_xfer(ub->ub_xfer); 1303 ub->ub_xfer = NULL; 1304 ub->ub_data = NULL; 1305 } 1306 } 1307 } 1308 1309 #endif /* NUCOM > 0 */ 1310 1311 int 1312 ucomprint(void *aux, const char *pnp) 1313 { 1314 struct ucom_attach_args *uca = aux; 1315 1316 if (pnp) 1317 aprint_normal("ucom at %s", pnp); 1318 if (uca->portno != UCOM_UNK_PORTNO) 1319 aprint_normal(" portno %d", uca->portno); 1320 return (UNCONF); 1321 } 1322 1323 int 1324 ucomsubmatch(device_t parent, cfdata_t cf, 1325 const int *ldesc, void *aux) 1326 { 1327 struct ucom_attach_args *uca = aux; 1328 1329 if (uca->portno != UCOM_UNK_PORTNO && 1330 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1331 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1332 return (0); 1333 return (config_match(parent, cf, aux)); 1334 } 1335
Indexes created Sun Oct 19 02:09:48 GMT 2025