sys/dev/usbmisc/ucom/ucom.c

   1 /*
   2  * $NetBSD: ucom.c,v 1.39 2001/08/16 22:31:24 augustss Exp $
   3  * $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $
   4  * $FreeBSD: src/sys/dev/usb/ucom.c,v 1.35 2003/11/16 11:58:21 akiyama Exp $
   5  * $DragonFly: src/sys/dev/usbmisc/ucom/ucom.c,v 1.32 2007/11/05 19:09:43 hasso Exp $
   6  */
   7 /*-
   8  * Copyright (c) 2001-2002, Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
   9  * All rights reserved.
  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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
  35  * All rights reserved.
  36  *
  37  * This code is derived from software contributed to The NetBSD Foundation
  38  * by Lennart Augustsson (lennart@augustsson.net) at
  39  * Carlstedt Research & Technology.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *        This product includes software developed by the NetBSD
  52  *        Foundation, Inc. and its contributors.
  53  * 4. Neither the name of The NetBSD Foundation nor the names of its
  54  *    contributors may be used to endorse or promote products derived
  55  *    from this software without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  58  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  59  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  60  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  61  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  62  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  63  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  64  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  65  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  66  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  67  * POSSIBILITY OF SUCH DAMAGE.
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/systm.h>
  72 #include <sys/kernel.h>
  73 #include <sys/malloc.h>
  74 #include <sys/bus.h>
  75 #include <sys/ioccom.h>
  76 #include <sys/fcntl.h>
  77 #include <sys/conf.h>
  78 #include <sys/tty.h>
  79 #include <sys/clist.h>
  80 #include <sys/file.h>
  81 #include <sys/select.h>
  82 #include <sys/proc.h>
  83 #include <sys/poll.h>
  84 #include <sys/sysctl.h>
  85 #include <sys/thread2.h>
  86
  87 #include <bus/usb/usb.h>
  88 #include <bus/usb/usbcdc.h>
  89
  90 #include <bus/usb/usbdi.h>
  91 #include <bus/usb/usbdi_util.h>
  92 #include <bus/usb/usb_quirks.h>
  93
  94 #include "ucomvar.h"
  95
  96 #ifdef USB_DEBUG
  97 static int      ucomdebug = 0;
  98 SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
  99 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW,
 100            &ucomdebug, 0, "ucom debug level");
 101 #define DPRINTF(x)      do { \
 102                                 if (ucomdebug) \
 103                                         kprintf x; \
 104                         } while (0)
 105
 106 #define DPRINTFN(n, x)  do { \
 107                                 if (ucomdebug > (n)) \
 108                                         kprintf x; \
 109                         } while (0)
 110 #else
 111 #define DPRINTF(x)
 112 #define DPRINTFN(n, x)
 113 #endif
 114
 115 static d_open_t  ucomopen;
 116 static d_close_t ucomclose;
 117 static d_read_t  ucomread;
 118 static d_write_t ucomwrite;
 119 static d_ioctl_t ucomioctl;
 120
 121 #define UCOM_CDEV_MAJOR  138
 122
 123 static struct dev_ops ucom_ops = {
 124         { "ucom", UCOM_CDEV_MAJOR, D_TTY | D_KQFILTER },
 125         .d_open =       ucomopen,
 126         .d_close =      ucomclose,
 127         .d_read =       ucomread,
 128         .d_write =      ucomwrite,
 129         .d_ioctl =      ucomioctl,
 130         .d_poll =       ttypoll,
 131         .d_kqfilter =   ttykqfilter
 132 };
 133
 134 static void ucom_cleanup(struct ucom_softc *);
 135 static int ucomctl(struct ucom_softc *, int, int);
 136 static int ucomparam(struct tty *, struct termios *);
 137 static void ucomstart(struct tty *);
 138 static void ucomstop(struct tty *, int);
 139 static void ucom_shutdown(struct ucom_softc *);
 140 static void ucom_dtr(struct ucom_softc *, int);
 141 static void ucom_rts(struct ucom_softc *, int);
 142 static void ucom_break(struct ucom_softc *, int);
 143 static usbd_status ucomstartread(struct ucom_softc *);
 144 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
 145 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
 146 static void ucomstopread(struct ucom_softc *);
 147 static void disc_optim(struct tty *, struct termios *, struct ucom_softc *);
 148
 149 devclass_t ucom_devclass;
 150
 151 static moduledata_t ucom_mod = {
 152         "ucom",
 153         NULL,
 154         NULL
 155 };
 156
 157 DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
 158 MODULE_DEPEND(ucom, usb, 1, 1, 1);
 159 MODULE_VERSION(ucom, UCOM_MODVER);
 160
 161 int
 162 ucom_attach(struct ucom_softc *sc)
 163 {
 164         struct tty *tp;
 165         int unit;
 166         cdev_t dev;
 167
 168         unit = device_get_unit(sc->sc_dev);
 169
 170         sc->sc_tty = tp = ttymalloc(sc->sc_tty);
 171         tp->t_oproc = ucomstart;
 172         tp->t_param = ucomparam;
 173         tp->t_stop = ucomstop;
 174
 175         DPRINTF(("ucom_attach: tty_attach tp = %p\n", tp));
 176
 177         DPRINTF(("ucom_attach: make_dev: ucom%d\n", unit));
 178
 179         dev_ops_add(&ucom_ops, UCOMUNIT_MASK, unit);
 180         dev = make_dev(&ucom_ops, unit | UCOM_CALLOUT_MASK,
 181                         UID_UUCP, GID_DIALER, 0660,
 182                         "ucom%d", unit);
 183         dev->si_tty = tp;
 184
 185         return (0);
 186 }
 187
 188 int
 189 ucom_detach(struct ucom_softc *sc)
 190 {
 191         struct tty *tp = sc->sc_tty;
 192         int unit;
 193
 194         DPRINTF(("ucom_detach: sc = %p, tp = %p\n", sc, sc->sc_tty));
 195
 196         sc->sc_dying = 1;
 197
 198         if (sc->sc_bulkin_pipe != NULL)
 199                 usbd_abort_pipe(sc->sc_bulkin_pipe);
 200         if (sc->sc_bulkout_pipe != NULL)
 201                 usbd_abort_pipe(sc->sc_bulkout_pipe);
 202
 203         if (tp != NULL) {
 204                 if (tp->t_state & TS_ISOPEN) {
 205                         device_printf(sc->sc_dev,
 206                                       "still open, forcing close\n");
 207                         (*linesw[tp->t_line].l_close)(tp, 0);
 208                         ttyclose(tp);
 209                 }
 210         } else {
 211                 DPRINTF(("ucom_detach: no tty\n"));
 212                 return (0);
 213         }
 214
 215         crit_enter();
 216         if (--sc->sc_refcnt >= 0) {
 217                 /* Wait for processes to go away. */
 218                 usb_detach_wait(sc->sc_dev);
 219         }
 220         crit_exit();
 221
 222         unit = device_get_unit(sc->sc_dev);
 223         dev_ops_remove(&ucom_ops, UCOMUNIT_MASK, unit);
 224
 225         return (0);
 226 }
 227
 228 static void
 229 ucom_shutdown(struct ucom_softc *sc)
 230 {
 231         struct tty *tp = sc->sc_tty;
 232
 233         DPRINTF(("ucom_shutdown\n"));
 234         /*
 235          * Hang up if necessary.  Wait a bit, so the other side has time to
 236          * notice even if we immediately open the port again.
 237          */
 238         if (ISSET(tp->t_cflag, HUPCL)) {
 239                 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
 240                 (void)tsleep(sc, 0, "ucomsd", hz);
 241         }
 242 }
 243
 244 static int
 245 ucomopen(struct dev_open_args *ap)
 246 {
 247         cdev_t dev = ap->a_head.a_dev;
 248         int unit = UCOMUNIT(dev);
 249         struct ucom_softc *sc;
 250         usbd_status err;
 251         struct tty *tp;
 252         int error;
 253
 254         sc = devclass_get_softc(ucom_devclass, unit);
 255         if (sc == NULL)
 256                 return (ENXIO);
 257
 258         if (sc->sc_dying)
 259                 return (ENXIO);
 260
 261         tp = sc->sc_tty;
 262
 263         DPRINTF(("%s: ucomopen: tp = %p\n", device_get_nameunit(sc->sc_dev), tp));
 264
 265         if (ISSET(tp->t_state, TS_ISOPEN) &&
 266             ISSET(tp->t_state, TS_XCLUDE) &&
 267             suser_cred(ap->a_cred, 0)
 268         ) {
 269                 return (EBUSY);
 270         }
 271
 272         /*
 273          * Do the following iff this is a first open.
 274          */
 275         crit_enter();
 276         while (sc->sc_opening)
 277                 tsleep(&sc->sc_opening, 0, "ucomop", 0);
 278         sc->sc_opening = 1;
 279
 280         if (!ISSET(tp->t_state, TS_ISOPEN)) {
 281                 struct termios t;
 282
 283                 sc->sc_poll = 0;
 284                 sc->sc_lsr = sc->sc_msr = sc->sc_mcr = 0;
 285
 286                 tp->t_dev = reference_dev(dev);
 287
 288                 /*
 289                  * Initialize the termios status to the defaults.  Add in the
 290                  * sticky bits from TIOCSFLAGS.
 291                  */
 292                 t.c_ispeed = 0;
 293                 t.c_ospeed = TTYDEF_SPEED;
 294                 t.c_cflag = TTYDEF_CFLAG;
 295                 /* Make sure ucomparam() will do something. */
 296                 tp->t_ospeed = 0;
 297                 (void)ucomparam(tp, &t);
 298                 tp->t_iflag = TTYDEF_IFLAG;
 299                 tp->t_oflag = TTYDEF_OFLAG;
 300                 tp->t_lflag = TTYDEF_LFLAG;
 301                 ttychars(tp);
 302                 ttsetwater(tp);
 303
 304                 /*
 305                  * Turn on DTR.  We must always do this, even if carrier is not
 306                  * present, because otherwise we'd have to use TIOCSDTR
 307                  * immediately after setting CLOCAL, which applications do not
 308                  * expect.  We always assert DTR while the device is open
 309                  * unless explicitly requested to deassert it.
 310                  */
 311                 (void)ucomctl(sc, TIOCM_DTR | TIOCM_RTS, DMBIS);
 312
 313                 /* Device specific open */
 314                 if (sc->sc_callback->ucom_open != NULL) {
 315                         error = sc->sc_callback->ucom_open(sc->sc_parent,
 316                                                            sc->sc_portno);
 317                         if (error) {
 318                                 ucom_cleanup(sc);
 319                                 sc->sc_opening = 0;
 320                                 wakeup(&sc->sc_opening);
 321                                 crit_exit();
 322                                 return (error);
 323                         }
 324                 }
 325
 326                 DPRINTF(("ucomopen: open pipes in = %d out = %d\n",
 327                          sc->sc_bulkin_no, sc->sc_bulkout_no));
 328
 329                 /* Open the bulk pipes */
 330                 /* Bulk-in pipe */
 331                 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
 332                                      &sc->sc_bulkin_pipe);
 333                 if (err) {
 334                         kprintf("%s: open bulk in error (addr %d): %s\n",
 335                                device_get_nameunit(sc->sc_dev), sc->sc_bulkin_no,
 336                                usbd_errstr(err));
 337                         error = EIO;
 338                         goto fail_0;
 339                 }
 340                 /* Bulk-out pipe */
 341                 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
 342                                      USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
 343                 if (err) {
 344                         kprintf("%s: open bulk out error (addr %d): %s\n",
 345                                device_get_nameunit(sc->sc_dev), sc->sc_bulkout_no,
 346                                usbd_errstr(err));
 347                         error = EIO;
 348                         goto fail_1;
 349                 }
 350
 351                 /* Allocate a request and an input buffer and start reading. */
 352                 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
 353                 if (sc->sc_ixfer == NULL) {
 354                         error = ENOMEM;
 355                         goto fail_2;
 356                 }
 357
 358                 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
 359                                                 sc->sc_ibufsizepad);
 360                 if (sc->sc_ibuf == NULL) {
 361                         error = ENOMEM;
 362                         goto fail_3;
 363                 }
 364
 365                 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
 366                 if (sc->sc_oxfer == NULL) {
 367                         error = ENOMEM;
 368                         goto fail_3;
 369                 }
 370
 371                 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
 372                                                 sc->sc_obufsize +
 373                                                 sc->sc_opkthdrlen);
 374                 if (sc->sc_obuf == NULL) {
 375                         error = ENOMEM;
 376                         goto fail_4;
 377                 }
 378
 379                 /*
 380                  * Handle initial DCD.
 381                  */
 382                 if (ISSET(sc->sc_msr, UMSR_DCD) ||
 383                     (minor(dev) & UCOM_CALLOUT_MASK))
 384                         (*linesw[tp->t_line].l_modem)(tp, 1);
 385
 386                 ucomstartread(sc);
 387         }
 388
 389         sc->sc_opening = 0;
 390         wakeup(&sc->sc_opening);
 391         crit_exit();
 392
 393         error = ttyopen(dev, tp);
 394         if (error)
 395                 goto bad;
 396
 397         error = (*linesw[tp->t_line].l_open)(dev, tp);
 398         if (error)
 399                 goto bad;
 400
 401         disc_optim(tp, &tp->t_termios, sc);
 402
 403         DPRINTF(("%s: ucomopen: success\n", device_get_nameunit(sc->sc_dev)));
 404
 405         sc->sc_poll = 1;
 406         sc->sc_refcnt++;
 407
 408         return (0);
 409
 410 fail_4:
 411         usbd_free_xfer(sc->sc_oxfer);
 412         sc->sc_oxfer = NULL;
 413 fail_3:
 414         usbd_free_xfer(sc->sc_ixfer);
 415         sc->sc_ixfer = NULL;
 416 fail_2:
 417         usbd_close_pipe(sc->sc_bulkout_pipe);
 418         sc->sc_bulkout_pipe = NULL;
 419 fail_1:
 420         usbd_close_pipe(sc->sc_bulkin_pipe);
 421         sc->sc_bulkin_pipe = NULL;
 422 fail_0:
 423         sc->sc_opening = 0;
 424         wakeup(&sc->sc_opening);
 425         crit_exit();
 426         return (error);
 427
 428 bad:
 429         if (!ISSET(tp->t_state, TS_ISOPEN)) {
 430                 /*
 431                  * We failed to open the device, and nobody else had it opened.
 432                  * Clean up the state as appropriate.
 433                  */
 434                 ucom_cleanup(sc);
 435         }
 436
 437         DPRINTF(("%s: ucomopen: failed\n", device_get_nameunit(sc->sc_dev)));
 438
 439         return (error);
 440 }
 441
 442 static int
 443 ucomclose(struct dev_close_args *ap)
 444 {
 445         cdev_t dev = ap->a_head.a_dev;
 446         struct ucom_softc *sc;
 447         struct tty *tp;
 448
 449         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
 450
 451         tp = sc->sc_tty;
 452
 453         DPRINTF(("%s: ucomclose: unit = %d\n",
 454                 device_get_nameunit(sc->sc_dev), UCOMUNIT(dev)));
 455
 456         if (!ISSET(tp->t_state, TS_ISOPEN))
 457                 goto quit;
 458
 459         crit_enter();
 460         (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
 461         disc_optim(tp, &tp->t_termios, sc);
 462         ttyclose(tp);
 463         crit_exit();
 464
 465         if (sc->sc_dying)
 466                 goto quit;
 467
 468         if (!ISSET(tp->t_state, TS_ISOPEN)) {
 469                 /*
 470                  * Although we got a last close, the device may still be in
 471                  * use; e.g. if this was the dialout node, and there are still
 472                  * processes waiting for carrier on the non-dialout node.
 473                  */
 474                 ucom_cleanup(sc);
 475         }
 476
 477         if (sc->sc_callback->ucom_close != NULL)
 478                 sc->sc_callback->ucom_close(sc->sc_parent, sc->sc_portno);
 479
 480 quit:
 481         if (tp->t_dev) {
 482                 release_dev(tp->t_dev);
 483                 tp->t_dev = NULL;
 484         }
 485
 486         if (--sc->sc_refcnt < 0)
 487                 usb_detach_wakeup(sc->sc_dev);
 488
 489         return (0);
 490 }
 491
 492 static int
 493 ucomread(struct dev_read_args *ap)
 494 {
 495         cdev_t dev = ap->a_head.a_dev;
 496         struct ucom_softc *sc;
 497         struct tty *tp;
 498         int error;
 499
 500         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
 501         tp = sc->sc_tty;
 502
 503         DPRINTF(("ucomread: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
 504
 505         if (sc->sc_dying)
 506                 return (EIO);
 507
 508         error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
 509
 510         DPRINTF(("ucomread: error = %d\n", error));
 511
 512         return (error);
 513 }
 514
 515 static int
 516 ucomwrite(struct dev_write_args *ap)
 517 {
 518         cdev_t dev = ap->a_head.a_dev;
 519         struct ucom_softc *sc;
 520         struct tty *tp;
 521         int error;
 522
 523         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
 524         tp = sc->sc_tty;
 525
 526         DPRINTF(("ucomwrite: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
 527
 528         if (sc->sc_dying)
 529                 return (EIO);
 530
 531         error = (*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag);
 532
 533         DPRINTF(("ucomwrite: error = %d\n", error));
 534
 535         return (error);
 536 }
 537
 538 static int
 539 ucomioctl(struct dev_ioctl_args *ap)
 540 {
 541         cdev_t dev = ap->a_head.a_dev;
 542         struct ucom_softc *sc;
 543         struct tty *tp;
 544         int error;
 545         int d;
 546
 547         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
 548         tp = sc->sc_tty;
 549
 550         if (sc->sc_dying)
 551                 return (EIO);
 552
 553         DPRINTF(("ucomioctl: cmd = 0x%08lx\n", ap->a_cmd));
 554
 555         error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
 556                                               ap->a_fflag, ap->a_cred);
 557         if (error != ENOIOCTL) {
 558                 DPRINTF(("ucomioctl: l_ioctl: error = %d\n", error));
 559                 return (error);
 560         }
 561
 562         crit_enter();
 563
 564         error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
 565         disc_optim(tp, &tp->t_termios, sc);
 566         if (error != ENOIOCTL) {
 567                 crit_exit();
 568                 DPRINTF(("ucomioctl: ttioctl: error = %d\n", error));
 569                 return (error);
 570         }
 571
 572         if (sc->sc_callback->ucom_ioctl != NULL) {
 573                 error = sc->sc_callback->ucom_ioctl(sc->sc_parent,
 574                                                     sc->sc_portno,
 575                                                     ap->a_cmd, ap->a_data,
 576                                                     ap->a_fflag, curthread);
 577                 if (error >= 0) {
 578                         crit_exit();
 579                         return (error);
 580                 }
 581         }
 582
 583         error = 0;
 584
 585         DPRINTF(("ucomioctl: our cmd = 0x%08lx\n", ap->a_cmd));
 586
 587         switch (ap->a_cmd) {
 588         case TIOCSBRK:
 589                 DPRINTF(("ucomioctl: TIOCSBRK\n"));
 590                 ucom_break(sc, 1);
 591                 break;
 592         case TIOCCBRK:
 593                 DPRINTF(("ucomioctl: TIOCCBRK\n"));
 594                 ucom_break(sc, 0);
 595                 break;
 596
 597         case TIOCSDTR:
 598                 DPRINTF(("ucomioctl: TIOCSDTR\n"));
 599                 (void)ucomctl(sc, TIOCM_DTR, DMBIS);
 600                 break;
 601         case TIOCCDTR:
 602                 DPRINTF(("ucomioctl: TIOCCDTR\n"));
 603                 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
 604                 break;
 605
 606         case TIOCMSET:
 607                 d = *(int *)ap->a_data;
 608                 DPRINTF(("ucomioctl: TIOCMSET, 0x%x\n", d));
 609                 (void)ucomctl(sc, d, DMSET);
 610                 break;
 611         case TIOCMBIS:
 612                 d = *(int *)ap->a_data;
 613                 DPRINTF(("ucomioctl: TIOCMBIS, 0x%x\n", d));
 614                 (void)ucomctl(sc, d, DMBIS);
 615                 break;
 616         case TIOCMBIC:
 617                 d = *(int *)ap->a_data;
 618                 DPRINTF(("ucomioctl: TIOCMBIC, 0x%x\n", d));
 619                 (void)ucomctl(sc, d, DMBIC);
 620                 break;
 621         case TIOCMGET:
 622                 d = ucomctl(sc, 0, DMGET);
 623                 DPRINTF(("ucomioctl: TIOCMGET, 0x%x\n", d));
 624                 *(int *)ap->a_data = d;
 625                 break;
 626
 627         default:
 628                 DPRINTF(("ucomioctl: error: our cmd = 0x%08lx\n", ap->a_cmd));
 629                 error = ENOTTY;
 630                 break;
 631         }
 632
 633         crit_exit();
 634
 635         return (error);
 636 }
 637
 638 static int
 639 ucomctl(struct ucom_softc *sc, int bits, int how)
 640 {
 641         int     mcr;
 642         int     msr;
 643         int     onoff;
 644
 645         DPRINTF(("ucomctl: bits = 0x%x, how = %d\n", bits, how));
 646
 647         if (how == DMGET) {
 648                 SET(bits, TIOCM_LE);            /* always set TIOCM_LE bit */
 649                 DPRINTF(("ucomctl: DMGET: LE"));
 650
 651                 mcr = sc->sc_mcr;
 652                 if (ISSET(mcr, UMCR_DTR)) {
 653                         SET(bits, TIOCM_DTR);
 654                         DPRINTF((" DTR"));
 655                 }
 656                 if (ISSET(mcr, UMCR_RTS)) {
 657                         SET(bits, TIOCM_RTS);
 658                         DPRINTF((" RTS"));
 659                 }
 660
 661                 msr = sc->sc_msr;
 662                 if (ISSET(msr, UMSR_CTS)) {
 663                         SET(bits, TIOCM_CTS);
 664                         DPRINTF((" CTS"));
 665                 }
 666                 if (ISSET(msr, UMSR_DCD)) {
 667                         SET(bits, TIOCM_CD);
 668                         DPRINTF((" CD"));
 669                 }
 670                 if (ISSET(msr, UMSR_DSR)) {
 671                         SET(bits, TIOCM_DSR);
 672                         DPRINTF((" DSR"));
 673                 }
 674                 if (ISSET(msr, UMSR_RI)) {
 675                         SET(bits, TIOCM_RI);
 676                         DPRINTF((" RI"));
 677                 }
 678
 679                 DPRINTF(("\n"));
 680
 681                 return (bits);
 682         }
 683
 684         mcr = 0;
 685         if (ISSET(bits, TIOCM_DTR))
 686                 SET(mcr, UMCR_DTR);
 687         if (ISSET(bits, TIOCM_RTS))
 688                 SET(mcr, UMCR_RTS);
 689
 690         switch (how) {
 691         case DMSET:
 692                 sc->sc_mcr = mcr;
 693                 break;
 694         case DMBIS:
 695                 sc->sc_mcr |= mcr;
 696                 break;
 697         case DMBIC:
 698                 sc->sc_mcr &= ~mcr;
 699                 break;
 700         }
 701
 702         onoff = ISSET(sc->sc_mcr, UMCR_DTR) ? 1 : 0;
 703         ucom_dtr(sc, onoff);
 704
 705         onoff = ISSET(sc->sc_mcr, UMCR_RTS) ? 1 : 0;
 706         ucom_rts(sc, onoff);
 707
 708         return (0);
 709 }
 710
 711 static void
 712 ucom_break(struct ucom_softc *sc, int onoff)
 713 {
 714         DPRINTF(("ucom_break: onoff = %d\n", onoff));
 715
 716         if (sc->sc_callback->ucom_set == NULL)
 717                 return;
 718         sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
 719                                   UCOM_SET_BREAK, onoff);
 720 }
 721
 722 static void
 723 ucom_dtr(struct ucom_softc *sc, int onoff)
 724 {
 725         DPRINTF(("ucom_dtr: onoff = %d\n", onoff));
 726
 727         if (sc->sc_callback->ucom_set == NULL)
 728                 return;
 729         sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
 730                                   UCOM_SET_DTR, onoff);
 731 }
 732
 733 static void
 734 ucom_rts(struct ucom_softc *sc, int onoff)
 735 {
 736         DPRINTF(("ucom_rts: onoff = %d\n", onoff));
 737
 738         if (sc->sc_callback->ucom_set == NULL)
 739                 return;
 740         sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
 741                                   UCOM_SET_RTS, onoff);
 742 }
 743
 744 void
 745 ucom_status_change(struct ucom_softc *sc)
 746 {
 747         struct tty *tp = sc->sc_tty;
 748         u_char old_msr;
 749         int onoff;
 750
 751         if (sc->sc_callback->ucom_get_status == NULL) {
 752                 sc->sc_lsr = 0;
 753                 sc->sc_msr = 0;
 754                 return;
 755         }
 756
 757         old_msr = sc->sc_msr;
 758         sc->sc_callback->ucom_get_status(sc->sc_parent, sc->sc_portno,
 759                                          &sc->sc_lsr, &sc->sc_msr);
 760         if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) {
 761                 if (sc->sc_poll == 0)
 762                         return;
 763                 onoff = ISSET(sc->sc_msr, UMSR_DCD) ? 1 : 0;
 764                 DPRINTF(("ucom_status_change: DCD changed to %d\n", onoff));
 765                 (*linesw[tp->t_line].l_modem)(tp, onoff);
 766         }
 767 }
 768
 769 static int
 770 ucomparam(struct tty *tp, struct termios *t)
 771 {
 772         struct ucom_softc *sc;
 773         int error;
 774         usbd_status uerr;
 775
 776         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
 777
 778         if (sc->sc_dying)
 779                 return (EIO);
 780
 781         DPRINTF(("ucomparam: sc = %p\n", sc));
 782
 783         /* Check requested parameters. */
 784         if (t->c_ospeed < 0) {
 785                 DPRINTF(("ucomparam: negative ospeed\n"));
 786                 return (EINVAL);
 787         }
 788         if (t->c_ispeed && t->c_ispeed != t->c_ospeed) {
 789                 DPRINTF(("ucomparam: mismatch ispeed and ospeed\n"));
 790                 return (EINVAL);
 791         }
 792
 793         /*
 794          * If there were no changes, don't do anything.  This avoids dropping
 795          * input and improves performance when all we did was frob things like
 796          * VMIN and VTIME.
 797          */
 798         if (tp->t_ospeed == t->c_ospeed &&
 799             tp->t_cflag == t->c_cflag)
 800                 return (0);
 801
 802         /* And copy to tty. */
 803         tp->t_ispeed = 0;
 804         tp->t_ospeed = t->c_ospeed;
 805         tp->t_cflag = t->c_cflag;
 806
 807         if (sc->sc_callback->ucom_param == NULL)
 808                 return (0);
 809
 810         ucomstopread(sc);
 811
 812         error = sc->sc_callback->ucom_param(sc->sc_parent, sc->sc_portno, t);
 813         if (error) {
 814                 DPRINTF(("ucomparam: callback: error = %d\n", error));
 815                 return (error);
 816         }
 817
 818         ttsetwater(tp);
 819
 820         if (t->c_cflag & CRTS_IFLOW) {
 821                 sc->sc_state |= UCS_RTS_IFLOW;
 822         } else if (sc->sc_state & UCS_RTS_IFLOW) {
 823                 sc->sc_state &= ~UCS_RTS_IFLOW;
 824                 (void)ucomctl(sc, UMCR_RTS, DMBIS);
 825         }
 826
 827         disc_optim(tp, t, sc);
 828
 829         uerr = ucomstartread(sc);
 830         if (uerr != USBD_NORMAL_COMPLETION)
 831                 return (EIO);
 832
 833         return (0);
 834 }
 835
 836 static void
 837 ucomstart(struct tty *tp)
 838 {
 839         struct ucom_softc *sc;
 840         struct cblock *cbp;
 841         usbd_status err;
 842         u_char *data;
 843         int cnt;
 844
 845         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
 846         DPRINTF(("ucomstart: sc = %p\n", sc));
 847
 848         if (sc->sc_dying)
 849                 return;
 850
 851         crit_enter();
 852
 853         if (tp->t_state & TS_TBLOCK) {
 854                 if (ISSET(sc->sc_mcr, UMCR_RTS) &&
 855                     ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
 856                         DPRINTF(("ucomstart: clear RTS\n"));
 857                         (void)ucomctl(sc, UMCR_RTS, DMBIC);
 858                 }
 859         } else {
 860                 if (!ISSET(sc->sc_mcr, UMCR_RTS) &&
 861                     tp->t_rawq.c_cc <= tp->t_ilowat &&
 862                     ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
 863                         DPRINTF(("ucomstart: set RTS\n"));
 864                         (void)ucomctl(sc, UMCR_RTS, DMBIS);
 865                 }
 866         }
 867
 868         if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
 869                 ttwwakeup(tp);
 870                 DPRINTF(("ucomstart: stopped\n"));
 871                 goto out;
 872         }
 873
 874         if (tp->t_outq.c_cc <= tp->t_olowat) {
 875                 if (ISSET(tp->t_state, TS_SO_OLOWAT)) {
 876                         CLR(tp->t_state, TS_SO_OLOWAT);
 877                         wakeup(TSA_OLOWAT(tp));
 878                 }
 879                 selwakeup(&tp->t_wsel);
 880                 if (tp->t_outq.c_cc == 0) {
 881                         if (ISSET(tp->t_state, TS_BUSY | TS_SO_OCOMPLETE) ==
 882                             TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
 883                                 CLR(tp->t_state, TS_SO_OCOMPLETE);
 884                                 wakeup(TSA_OCOMPLETE(tp));
 885                         }
 886                         goto out;
 887                 }
 888         }
 889
 890         /* Grab the first contiguous region of buffer space. */
 891         data = tp->t_outq.c_cf;
 892         cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
 893         cnt = min((char *) (cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
 894
 895         if (cnt == 0) {
 896                 DPRINTF(("ucomstart: cnt == 0\n"));
 897                 goto out;
 898         }
 899
 900         SET(tp->t_state, TS_BUSY);
 901
 902         if (cnt > sc->sc_obufsize) {
 903                 DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
 904                 cnt = sc->sc_obufsize;
 905         }
 906         if (sc->sc_callback->ucom_write != NULL)
 907                 sc->sc_callback->ucom_write(sc->sc_parent, sc->sc_portno,
 908                                             sc->sc_obuf, data, &cnt);
 909         else
 910                 memcpy(sc->sc_obuf, data, cnt);
 911
 912         DPRINTF(("ucomstart: %d chars\n", cnt));
 913         usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
 914                         (usbd_private_handle)sc, sc->sc_obuf, cnt,
 915                         USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
 916         /* What can we do on error? */
 917         err = usbd_transfer(sc->sc_oxfer);
 918         if (err != USBD_IN_PROGRESS)
 919                 kprintf("ucomstart: err=%s\n", usbd_errstr(err));
 920
 921         ttwwakeup(tp);
 922
 923     out:
 924         crit_exit();
 925 }
 926
 927 static void
 928 ucomstop(struct tty *tp, int flag)
 929 {
 930         struct ucom_softc *sc;
 931
 932         sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
 933
 934         DPRINTF(("ucomstop: %d\n", flag));
 935
 936         if (flag & FREAD) {
 937                 /*
 938                  * This is just supposed to flush pending receive data,
 939                  * not stop the reception of data entirely!
 940                  */
 941                 DPRINTF(("ucomstop: read\n"));
 942                 ucomstopread(sc);
 943                 ucomstartread(sc);
 944         }
 945
 946         if (flag & FWRITE) {
 947                 DPRINTF(("ucomstop: write\n"));
 948                 crit_enter();
 949                 if (ISSET(tp->t_state, TS_BUSY)) {
 950                         /* XXX do what? */
 951                         if (!ISSET(tp->t_state, TS_TTSTOP))
 952                                 SET(tp->t_state, TS_FLUSH);
 953                 }
 954                 crit_exit();
 955         }
 956
 957         DPRINTF(("ucomstop: done\n"));
 958 }
 959
 960 static void
 961 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
 962 {
 963         struct ucom_softc *sc = (struct ucom_softc *)p;
 964         struct tty *tp = sc->sc_tty;
 965         u_int32_t cc;
 966
 967         DPRINTF(("ucomwritecb: status = %d\n", status));
 968
 969         if (status == USBD_CANCELLED || sc->sc_dying)
 970                 goto error;
 971
 972         if (status != USBD_NORMAL_COMPLETION) {
 973                 kprintf("%s: ucomwritecb: %s\n",
 974                        device_get_nameunit(sc->sc_dev), usbd_errstr(status));
 975                 if (status == USBD_STALLED)
 976                         usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
 977                 /*
 978                  * XXX.  We may need a flag to sequence ucomstopread() and
 979                  * ucomstartread() to handle the case where ucomstartread()
 980                  * is called after ucomstopread() but before the request has
 981                  * been properly canceled?
 982                  */
 983                 goto error;
 984         }
 985
 986         usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 987         DPRINTF(("ucomwritecb: cc = %d\n", cc));
 988         if (cc <= sc->sc_opkthdrlen) {
 989                 kprintf("%s: sent size too small, cc = %d\n",
 990                         device_get_nameunit(sc->sc_dev), cc);
 991                 goto error;
 992         }
 993
 994         /* convert from USB bytes to tty bytes */
 995         cc -= sc->sc_opkthdrlen;
 996
 997         crit_enter();
 998         CLR(tp->t_state, TS_BUSY);
 999         if (ISSET(tp->t_state, TS_FLUSH))
1000                 CLR(tp->t_state, TS_FLUSH);
1001         else
1002                 ndflush(&tp->t_outq, cc);
1003         (*linesw[tp->t_line].l_start)(tp);
1004         crit_exit();
1005
1006         return;
1007
1008   error:
1009         crit_enter();
1010         CLR(tp->t_state, TS_BUSY);
1011         crit_exit();
1012         return;
1013 }
1014
1015 static usbd_status
1016 ucomstartread(struct ucom_softc *sc)
1017 {
1018         usbd_status err;
1019
1020         DPRINTF(("ucomstartread: start\n"));
1021
1022         sc->sc_state &= ~UCS_RXSTOP;
1023
1024         if (sc->sc_bulkin_pipe == NULL)
1025                 return (USBD_NORMAL_COMPLETION);
1026
1027         usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
1028                         (usbd_private_handle)sc,
1029                         sc->sc_ibuf, sc->sc_ibufsize,
1030                         USBD_SHORT_XFER_OK | USBD_NO_COPY,
1031                         USBD_NO_TIMEOUT, ucomreadcb);
1032
1033         err = usbd_transfer(sc->sc_ixfer);
1034         if (err != USBD_IN_PROGRESS) {
1035                 DPRINTF(("ucomstartread: err = %s\n", usbd_errstr(err)));
1036                 return (err);
1037         }
1038
1039         return (USBD_NORMAL_COMPLETION);
1040 }
1041
1042 static void
1043 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
1044 {
1045         struct ucom_softc *sc = (struct ucom_softc *)p;
1046         struct tty *tp = sc->sc_tty;
1047         int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
1048         usbd_status err;
1049         u_int32_t cc;
1050         u_char *cp;
1051         int lostcc;
1052
1053         DPRINTF(("ucomreadcb: status = %d\n", status));
1054
1055         if (status != USBD_NORMAL_COMPLETION) {
1056                 if (!(sc->sc_state & UCS_RXSTOP))
1057                         kprintf("%s: ucomreadcb: %s\n",
1058                                device_get_nameunit(sc->sc_dev), usbd_errstr(status));
1059                 if (status == USBD_STALLED)
1060                         usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
1061                 /* XXX we should restart after some delay. */
1062                 return;
1063         }
1064
1065         usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
1066         DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
1067         if (cc == 0)
1068                 goto resubmit;
1069
1070         if (sc->sc_callback->ucom_read != NULL) {
1071                 sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
1072                                            &cp, &cc);
1073         }
1074
1075         if (cc > sc->sc_ibufsize) {
1076                 kprintf("%s: invalid receive data size, %d chars\n",
1077                         device_get_nameunit(sc->sc_dev), cc);
1078                 goto resubmit;
1079         }
1080         if (cc < 1)
1081                 goto resubmit;
1082
1083         crit_enter();
1084         if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1085                 if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
1086                     && (sc->sc_state & UCS_RTS_IFLOW
1087                         || tp->t_iflag & IXOFF)
1088                     && !(tp->t_state & TS_TBLOCK))
1089                         ttyblock(tp);
1090                 lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
1091                 tp->t_rawcc += cc;
1092                 if (sc->hotchar) {
1093                         while (cc) {
1094                                 if (*cp == sc->hotchar)
1095                                         break;
1096                                 --cc;
1097                                 ++cp;
1098                         }
1099                         if (cc)
1100                                 setsofttty();
1101                 }
1102                 ttwakeup(tp);
1103                 if (tp->t_state & TS_TTSTOP
1104                     && (tp->t_iflag & IXANY
1105                         || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1106                         tp->t_state &= ~TS_TTSTOP;
1107                         tp->t_lflag &= ~FLUSHO;
1108                         ucomstart(tp);
1109                 }
1110                 if (lostcc > 0)
1111                         kprintf("%s: lost %d chars\n", device_get_nameunit(sc->sc_dev),
1112                                lostcc);
1113         } else {
1114                 /* Give characters to tty layer. */
1115                 while (cc > 0) {
1116                         DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
1117                         if ((*rint)(*cp, tp) == -1) {
1118                                 /* XXX what should we do? */
1119                                 kprintf("%s: lost %d chars\n",
1120                                        device_get_nameunit(sc->sc_dev), cc);
1121                                 break;
1122                         }
1123                         cc--;
1124                         cp++;
1125                 }
1126         }
1127         crit_exit();
1128
1129 resubmit:
1130         err = ucomstartread(sc);
1131         if (err) {
1132                 kprintf("%s: read start failed\n", device_get_nameunit(sc->sc_dev));
1133                 /* XXX what should we dow now? */
1134         }
1135
1136         if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
1137             && !(tp->t_state & TS_TBLOCK))
1138                 ucomctl(sc, UMCR_RTS, DMBIS);
1139 }
1140
1141 static void
1142 ucom_cleanup(struct ucom_softc *sc)
1143 {
1144         DPRINTF(("ucom_cleanup: closing pipes\n"));
1145
1146         ucom_shutdown(sc);
1147         if (sc->sc_bulkin_pipe != NULL) {
1148                 usbd_abort_pipe(sc->sc_bulkin_pipe);
1149                 usbd_close_pipe(sc->sc_bulkin_pipe);
1150                 sc->sc_bulkin_pipe = NULL;
1151         }
1152         if (sc->sc_bulkout_pipe != NULL) {
1153                 usbd_abort_pipe(sc->sc_bulkout_pipe);
1154                 usbd_close_pipe(sc->sc_bulkout_pipe);
1155                 sc->sc_bulkout_pipe = NULL;
1156         }
1157         if (sc->sc_ixfer != NULL) {
1158                 usbd_free_xfer(sc->sc_ixfer);
1159                 sc->sc_ixfer = NULL;
1160         }
1161         if (sc->sc_oxfer != NULL) {
1162                 usbd_free_xfer(sc->sc_oxfer);
1163                 sc->sc_oxfer = NULL;
1164         }
1165 }
1166
1167 static void
1168 ucomstopread(struct ucom_softc *sc)
1169 {
1170         usbd_status err;
1171
1172         DPRINTF(("ucomstopread: enter\n"));
1173
1174         if (!(sc->sc_state & UCS_RXSTOP)) {
1175                 sc->sc_state |= UCS_RXSTOP;
1176                 if (sc->sc_bulkin_pipe == NULL) {
1177                         DPRINTF(("ucomstopread: bulkin pipe NULL\n"));
1178                         return;
1179                 }
1180                 err = usbd_abort_pipe(sc->sc_bulkin_pipe);
1181                 if (err) {
1182                         DPRINTF(("ucomstopread: err = %s\n",
1183                                  usbd_errstr(err)));
1184                 }
1185         }
1186
1187         DPRINTF(("ucomstopread: leave\n"));
1188 }
1189
1190 static void
1191 disc_optim(struct tty *tp, struct termios *t, struct ucom_softc *sc)
1192 {
1193         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1194             && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1195             && (!(t->c_iflag & PARMRK)
1196                 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1197             && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1198             && linesw[tp->t_line].l_rint == ttyinput) {
1199                 DPRINTF(("disc_optim: bypass l_rint\n"));
1200                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1201         } else {
1202                 DPRINTF(("disc_optim: can't bypass l_rint\n"));
1203                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1204         }
1205         sc->hotchar = linesw[tp->t_line].l_hotchar;
1206 }