1 /* $NetBSD: ucom.c,v 1.65 2006/07/21 16:48:53 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 /* 40 * This code is very heavily based on the 16550 driver, com.c. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.65 2006/07/21 16:48:53 ad Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/ioctl.h> 50 #include <sys/conf.h> 51 #include <sys/tty.h> 52 #include <sys/file.h> 53 #include <sys/select.h> 54 #include <sys/proc.h> 55 #include <sys/vnode.h> 56 #include <sys/device.h> 57 #include <sys/poll.h> 58 #include <sys/kauth.h> 59 #if defined(__NetBSD__) 60 #include "rnd.h" 61 #if NRND > 0 62 #include <sys/rnd.h> 63 #endif 64 #endif 65 66 #include <dev/usb/usb.h> 67 68 #include <dev/usb/usbdi.h> 69 #include <dev/usb/usbdi_util.h> 70 #include <dev/usb/usbdevs.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #include <dev/usb/ucomvar.h> 74 75 #include "ucom.h" 76 77 #include "locators.h" 78 79 #if NUCOM > 0 80 81 #ifdef UCOM_DEBUG 82 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 83 int ucomdebug = 0; 84 #else 85 #define DPRINTFN(n, x) 86 #endif 87 #define DPRINTF(x) DPRINTFN(0, x) 88 89 #define UCOMUNIT_MASK 0x3ffff 90 #define UCOMDIALOUT_MASK 0x80000 91 #define UCOMCALLUNIT_MASK 0x40000 92 93 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 94 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 95 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 96 97 struct ucom_softc { 98 USBBASEDEVICE sc_dev; /* base device */ 99 100 usbd_device_handle sc_udev; /* USB device */ 101 102 usbd_interface_handle sc_iface; /* data interface */ 103 104 int sc_bulkin_no; /* bulk in endpoint address */ 105 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 106 usbd_xfer_handle sc_ixfer; /* read request */ 107 u_char *sc_ibuf; /* read buffer */ 108 u_int sc_ibufsize; /* read buffer size */ 109 u_int sc_ibufsizepad; /* read buffer size padded */ 110 111 int sc_bulkout_no; /* bulk out endpoint address */ 112 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 113 usbd_xfer_handle sc_oxfer; /* write request */ 114 u_char *sc_obuf; /* write buffer */ 115 u_int sc_obufsize; /* write buffer size */ 116 u_int sc_opkthdrlen; /* header length of 117 * output packet */ 118 119 struct ucom_methods *sc_methods; 120 void *sc_parent; 121 int sc_portno; 122 123 struct tty *sc_tty; /* our tty */ 124 u_char sc_lsr; 125 u_char sc_msr; 126 u_char sc_mcr; 127 u_char sc_tx_stopped; 128 int sc_swflags; 129 130 u_char sc_opening; /* lock during open */ 131 int sc_refcnt; 132 u_char sc_dying; /* disconnecting */ 133 134 #if defined(__NetBSD__) && NRND > 0 135 rndsource_element_t sc_rndsource; /* random source */ 136 #endif 137 }; 138 139 dev_type_open(ucomopen); 140 dev_type_close(ucomclose); 141 dev_type_read(ucomread); 142 dev_type_write(ucomwrite); 143 dev_type_ioctl(ucomioctl); 144 dev_type_stop(ucomstop); 145 dev_type_tty(ucomtty); 146 dev_type_poll(ucompoll); 147 148 const struct cdevsw ucom_cdevsw = { 149 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 150 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 151 }; 152 153 Static void ucom_cleanup(struct ucom_softc *); 154 Static void ucom_hwiflow(struct ucom_softc *); 155 Static int ucomparam(struct tty *, struct termios *); 156 Static void ucomstart(struct tty *); 157 Static void ucom_shutdown(struct ucom_softc *); 158 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 159 int, struct lwp *); 160 Static void ucom_dtr(struct ucom_softc *, int); 161 Static void ucom_rts(struct ucom_softc *, int); 162 Static void ucom_break(struct ucom_softc *, int); 163 Static usbd_status ucomstartread(struct ucom_softc *); 164 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 165 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 166 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 167 Static int ucom_to_tiocm(struct ucom_softc *); 168 169 USB_DECLARE_DRIVER(ucom); 170 171 USB_MATCH(ucom) 172 { 173 return (1); 174 } 175 176 USB_ATTACH(ucom) 177 { 178 struct ucom_softc *sc = (struct ucom_softc *)self; 179 struct ucom_attach_args *uca = aux; 180 struct tty *tp; 181 182 if (uca->info != NULL) 183 printf(": %s", uca->info); 184 printf("\n"); 185 186 sc->sc_udev = uca->device; 187 sc->sc_iface = uca->iface; 188 sc->sc_bulkout_no = uca->bulkout; 189 sc->sc_bulkin_no = uca->bulkin; 190 sc->sc_ibufsize = uca->ibufsize; 191 sc->sc_ibufsizepad = uca->ibufsizepad; 192 sc->sc_obufsize = uca->obufsize; 193 sc->sc_opkthdrlen = uca->opkthdrlen; 194 sc->sc_methods = uca->methods; 195 sc->sc_parent = uca->arg; 196 sc->sc_portno = uca->portno; 197 198 tp = ttymalloc(); 199 tp->t_oproc = ucomstart; 200 tp->t_param = ucomparam; 201 sc->sc_tty = tp; 202 203 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 204 tty_attach(tp); 205 206 #if defined(__NetBSD__) && NRND > 0 207 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 208 RND_TYPE_TTY, 0); 209 #endif 210 211 USB_ATTACH_SUCCESS_RETURN; 212 } 213 214 USB_DETACH(ucom) 215 { 216 struct ucom_softc *sc = (struct ucom_softc *)self; 217 struct tty *tp = sc->sc_tty; 218 int maj, mn; 219 int s; 220 221 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 222 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 223 224 sc->sc_dying = 1; 225 226 if (sc->sc_bulkin_pipe != NULL) 227 usbd_abort_pipe(sc->sc_bulkin_pipe); 228 if (sc->sc_bulkout_pipe != NULL) 229 usbd_abort_pipe(sc->sc_bulkout_pipe); 230 231 s = splusb(); 232 if (--sc->sc_refcnt >= 0) { 233 /* Wake up anyone waiting */ 234 if (tp != NULL) { 235 CLR(tp->t_state, TS_CARR_ON); 236 CLR(tp->t_cflag, CLOCAL | MDMBUF); 237 ttyflush(tp, FREAD|FWRITE); 238 } 239 /* Wait for processes to go away. */ 240 usb_detach_wait(USBDEV(sc->sc_dev)); 241 } 242 splx(s); 243 244 /* locate the major number */ 245 maj = cdevsw_lookup_major(&ucom_cdevsw); 246 247 /* Nuke the vnodes for any open instances. */ 248 mn = device_unit(self); 249 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 250 vdevgone(maj, mn, mn, VCHR); 251 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 252 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 253 254 /* Detach and free the tty. */ 255 if (tp != NULL) { 256 tty_detach(tp); 257 ttyfree(tp); 258 sc->sc_tty = NULL; 259 } 260 261 /* Detach the random source */ 262 #if defined(__NetBSD__) && NRND > 0 263 rnd_detach_source(&sc->sc_rndsource); 264 #endif 265 266 return (0); 267 } 268 269 int 270 ucom_activate(device_ptr_t self, enum devact act) 271 { 272 struct ucom_softc *sc = (struct ucom_softc *)self; 273 274 DPRINTFN(5,("ucom_activate: %d\n", act)); 275 276 switch (act) { 277 case DVACT_ACTIVATE: 278 return (EOPNOTSUPP); 279 280 case DVACT_DEACTIVATE: 281 sc->sc_dying = 1; 282 break; 283 } 284 return (0); 285 } 286 287 void 288 ucom_shutdown(struct ucom_softc *sc) 289 { 290 struct tty *tp = sc->sc_tty; 291 292 DPRINTF(("ucom_shutdown\n")); 293 /* 294 * Hang up if necessary. Wait a bit, so the other side has time to 295 * notice even if we immediately open the port again. 296 */ 297 if (ISSET(tp->t_cflag, HUPCL)) { 298 ucom_dtr(sc, 0); 299 (void)tsleep(sc, TTIPRI, ttclos, hz); 300 } 301 } 302 303 int 304 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 305 { 306 int unit = UCOMUNIT(dev); 307 usbd_status err; 308 struct ucom_softc *sc; 309 struct tty *tp; 310 int s; 311 int error; 312 313 if (unit >= ucom_cd.cd_ndevs) 314 return (ENXIO); 315 sc = ucom_cd.cd_devs[unit]; 316 if (sc == NULL) 317 return (ENXIO); 318 319 if (sc->sc_dying) 320 return (EIO); 321 322 if (!device_is_active(&sc->sc_dev)) 323 return (ENXIO); 324 325 tp = sc->sc_tty; 326 327 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 328 329 if (ISSET(tp->t_state, TS_ISOPEN) && 330 ISSET(tp->t_state, TS_XCLUDE) && 331 kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, 332 &l->l_acflag) != 0) 333 return (EBUSY); 334 335 s = spltty(); 336 337 /* 338 * Do the following iff this is a first open. 339 */ 340 while (sc->sc_opening) 341 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 342 343 if (sc->sc_dying) { 344 splx(s); 345 return (EIO); 346 } 347 sc->sc_opening = 1; 348 349 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 350 struct termios t; 351 352 tp->t_dev = dev; 353 354 if (sc->sc_methods->ucom_open != NULL) { 355 error = sc->sc_methods->ucom_open(sc->sc_parent, 356 sc->sc_portno); 357 if (error) { 358 ucom_cleanup(sc); 359 sc->sc_opening = 0; 360 wakeup(&sc->sc_opening); 361 splx(s); 362 return (error); 363 } 364 } 365 366 ucom_status_change(sc); 367 368 /* 369 * Initialize the termios status to the defaults. Add in the 370 * sticky bits from TIOCSFLAGS. 371 */ 372 t.c_ispeed = 0; 373 t.c_ospeed = TTYDEF_SPEED; 374 t.c_cflag = TTYDEF_CFLAG; 375 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 376 SET(t.c_cflag, CLOCAL); 377 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 378 SET(t.c_cflag, CRTSCTS); 379 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 380 SET(t.c_cflag, MDMBUF); 381 /* Make sure ucomparam() will do something. */ 382 tp->t_ospeed = 0; 383 (void) ucomparam(tp, &t); 384 tp->t_iflag = TTYDEF_IFLAG; 385 tp->t_oflag = TTYDEF_OFLAG; 386 tp->t_lflag = TTYDEF_LFLAG; 387 ttychars(tp); 388 ttsetwater(tp); 389 390 /* 391 * Turn on DTR. We must always do this, even if carrier is not 392 * present, because otherwise we'd have to use TIOCSDTR 393 * immediately after setting CLOCAL, which applications do not 394 * expect. We always assert DTR while the device is open 395 * unless explicitly requested to deassert it. Ditto RTS. 396 */ 397 ucom_dtr(sc, 1); 398 ucom_rts(sc, 1); 399 400 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 401 ucom_hwiflow(sc); 402 403 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 404 sc->sc_bulkin_no, sc->sc_bulkout_no)); 405 406 /* Open the bulk pipes */ 407 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 408 &sc->sc_bulkin_pipe); 409 if (err) { 410 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 411 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 412 usbd_errstr(err))); 413 error = EIO; 414 goto fail_0; 415 } 416 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 417 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 418 if (err) { 419 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 420 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 421 usbd_errstr(err))); 422 error = EIO; 423 goto fail_1; 424 } 425 426 /* Allocate a request and an input buffer and start reading. */ 427 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 428 if (sc->sc_ixfer == NULL) { 429 error = ENOMEM; 430 goto fail_2; 431 } 432 433 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 434 sc->sc_ibufsizepad); 435 if (sc->sc_ibuf == NULL) { 436 error = ENOMEM; 437 goto fail_3; 438 } 439 440 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 441 if (sc->sc_oxfer == NULL) { 442 error = ENOMEM; 443 goto fail_3; 444 } 445 446 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 447 sc->sc_obufsize + 448 sc->sc_opkthdrlen); 449 if (sc->sc_obuf == NULL) { 450 error = ENOMEM; 451 goto fail_4; 452 } 453 454 ucomstartread(sc); 455 } 456 sc->sc_opening = 0; 457 wakeup(&sc->sc_opening); 458 splx(s); 459 460 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 461 if (error) 462 goto bad; 463 464 error = (*tp->t_linesw->l_open)(dev, tp); 465 if (error) 466 goto bad; 467 468 return (0); 469 470 fail_4: 471 usbd_free_xfer(sc->sc_oxfer); 472 sc->sc_oxfer = NULL; 473 fail_3: 474 usbd_free_xfer(sc->sc_ixfer); 475 sc->sc_ixfer = NULL; 476 fail_2: 477 usbd_close_pipe(sc->sc_bulkout_pipe); 478 sc->sc_bulkout_pipe = NULL; 479 fail_1: 480 usbd_close_pipe(sc->sc_bulkin_pipe); 481 sc->sc_bulkin_pipe = NULL; 482 fail_0: 483 sc->sc_opening = 0; 484 wakeup(&sc->sc_opening); 485 splx(s); 486 return (error); 487 488 bad: 489 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 490 /* 491 * We failed to open the device, and nobody else had it opened. 492 * Clean up the state as appropriate. 493 */ 494 ucom_cleanup(sc); 495 } 496 497 return (error); 498 } 499 500 int 501 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 502 { 503 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 504 struct tty *tp = sc->sc_tty; 505 506 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 507 if (!ISSET(tp->t_state, TS_ISOPEN)) 508 return (0); 509 510 sc->sc_refcnt++; 511 512 (*tp->t_linesw->l_close)(tp, flag); 513 ttyclose(tp); 514 515 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 516 /* 517 * Although we got a last close, the device may still be in 518 * use; e.g. if this was the dialout node, and there are still 519 * processes waiting for carrier on the non-dialout node. 520 */ 521 ucom_cleanup(sc); 522 } 523 524 if (sc->sc_methods->ucom_close != NULL) 525 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 526 527 if (--sc->sc_refcnt < 0) 528 usb_detach_wakeup(USBDEV(sc->sc_dev)); 529 530 return (0); 531 } 532 533 int 534 ucomread(dev_t dev, struct uio *uio, int flag) 535 { 536 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 537 struct tty *tp = sc->sc_tty; 538 int error; 539 540 if (sc->sc_dying) 541 return (EIO); 542 543 sc->sc_refcnt++; 544 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 545 if (--sc->sc_refcnt < 0) 546 usb_detach_wakeup(USBDEV(sc->sc_dev)); 547 return (error); 548 } 549 550 int 551 ucomwrite(dev_t dev, struct uio *uio, int flag) 552 { 553 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 554 struct tty *tp = sc->sc_tty; 555 int error; 556 557 if (sc->sc_dying) 558 return (EIO); 559 560 sc->sc_refcnt++; 561 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 562 if (--sc->sc_refcnt < 0) 563 usb_detach_wakeup(USBDEV(sc->sc_dev)); 564 return (error); 565 } 566 567 int 568 ucompoll(dev_t dev, int events, struct lwp *l) 569 { 570 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 571 struct tty *tp = sc->sc_tty; 572 int revents; 573 574 if (sc->sc_dying) 575 return (POLLHUP); 576 577 sc->sc_refcnt++; 578 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 579 if (--sc->sc_refcnt < 0) 580 usb_detach_wakeup(USBDEV(sc->sc_dev)); 581 return (revents); 582 } 583 584 struct tty * 585 ucomtty(dev_t dev) 586 { 587 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 588 struct tty *tp = sc->sc_tty; 589 590 return (tp); 591 } 592 593 int 594 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 595 { 596 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 597 int error; 598 599 sc->sc_refcnt++; 600 error = ucom_do_ioctl(sc, cmd, data, flag, l); 601 if (--sc->sc_refcnt < 0) 602 usb_detach_wakeup(USBDEV(sc->sc_dev)); 603 return (error); 604 } 605 606 Static int 607 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 608 int flag, struct lwp *l) 609 { 610 struct tty *tp = sc->sc_tty; 611 int error; 612 int s; 613 614 if (sc->sc_dying) 615 return (EIO); 616 617 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 618 619 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 620 if (error != EPASSTHROUGH) 621 return (error); 622 623 error = ttioctl(tp, cmd, data, flag, l); 624 if (error != EPASSTHROUGH) 625 return (error); 626 627 if (sc->sc_methods->ucom_ioctl != NULL) { 628 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 629 sc->sc_portno, cmd, data, flag, l->l_proc); 630 if (error != EPASSTHROUGH) 631 return (error); 632 } 633 634 error = 0; 635 636 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 637 s = spltty(); 638 639 switch (cmd) { 640 case TIOCSBRK: 641 ucom_break(sc, 1); 642 break; 643 644 case TIOCCBRK: 645 ucom_break(sc, 0); 646 break; 647 648 case TIOCSDTR: 649 ucom_dtr(sc, 1); 650 break; 651 652 case TIOCCDTR: 653 ucom_dtr(sc, 0); 654 break; 655 656 case TIOCGFLAGS: 657 *(int *)data = sc->sc_swflags; 658 break; 659 660 case TIOCSFLAGS: 661 error = kauth_authorize_generic(l->l_cred, 662 KAUTH_GENERIC_ISSUSER, &l->l_acflag); 663 if (error) 664 break; 665 sc->sc_swflags = *(int *)data; 666 break; 667 668 case TIOCMSET: 669 case TIOCMBIS: 670 case TIOCMBIC: 671 tiocm_to_ucom(sc, cmd, *(int *)data); 672 break; 673 674 case TIOCMGET: 675 *(int *)data = ucom_to_tiocm(sc); 676 break; 677 678 default: 679 error = EPASSTHROUGH; 680 break; 681 } 682 683 splx(s); 684 685 return (error); 686 } 687 688 Static void 689 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 690 { 691 u_char combits; 692 693 combits = 0; 694 if (ISSET(ttybits, TIOCM_DTR)) 695 SET(combits, UMCR_DTR); 696 if (ISSET(ttybits, TIOCM_RTS)) 697 SET(combits, UMCR_RTS); 698 699 switch (how) { 700 case TIOCMBIC: 701 CLR(sc->sc_mcr, combits); 702 break; 703 704 case TIOCMBIS: 705 SET(sc->sc_mcr, combits); 706 break; 707 708 case TIOCMSET: 709 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 710 SET(sc->sc_mcr, combits); 711 break; 712 } 713 714 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 715 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 716 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 717 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 718 } 719 720 Static int 721 ucom_to_tiocm(struct ucom_softc *sc) 722 { 723 u_char combits; 724 int ttybits = 0; 725 726 combits = sc->sc_mcr; 727 if (ISSET(combits, UMCR_DTR)) 728 SET(ttybits, TIOCM_DTR); 729 if (ISSET(combits, UMCR_RTS)) 730 SET(ttybits, TIOCM_RTS); 731 732 combits = sc->sc_msr; 733 if (ISSET(combits, UMSR_DCD)) 734 SET(ttybits, TIOCM_CD); 735 if (ISSET(combits, UMSR_CTS)) 736 SET(ttybits, TIOCM_CTS); 737 if (ISSET(combits, UMSR_DSR)) 738 SET(ttybits, TIOCM_DSR); 739 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 740 SET(ttybits, TIOCM_RI); 741 742 #if 0 743 XXX; 744 if (sc->sc_ier != 0) 745 SET(ttybits, TIOCM_LE); 746 #endif 747 748 return (ttybits); 749 } 750 751 Static void 752 ucom_break(sc, onoff) 753 struct ucom_softc *sc; 754 int onoff; 755 { 756 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 757 758 if (sc->sc_methods->ucom_set != NULL) 759 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 760 UCOM_SET_BREAK, onoff); 761 } 762 763 Static void 764 ucom_dtr(struct ucom_softc *sc, int onoff) 765 { 766 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 767 768 if (sc->sc_methods->ucom_set != NULL) 769 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 770 UCOM_SET_DTR, onoff); 771 } 772 773 Static void 774 ucom_rts(struct ucom_softc *sc, int onoff) 775 { 776 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 777 778 if (sc->sc_methods->ucom_set != NULL) 779 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 780 UCOM_SET_RTS, onoff); 781 } 782 783 void 784 ucom_status_change(struct ucom_softc *sc) 785 { 786 struct tty *tp = sc->sc_tty; 787 u_char old_msr; 788 789 if (sc->sc_methods->ucom_get_status != NULL) { 790 old_msr = sc->sc_msr; 791 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 792 &sc->sc_lsr, &sc->sc_msr); 793 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 794 (*tp->t_linesw->l_modem)(tp, 795 ISSET(sc->sc_msr, UMSR_DCD)); 796 } else { 797 sc->sc_lsr = 0; 798 /* Assume DCD is present, if we have no chance to check it. */ 799 sc->sc_msr = UMSR_DCD; 800 } 801 } 802 803 Static int 804 ucomparam(struct tty *tp, struct termios *t) 805 { 806 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 807 int error; 808 809 if (sc->sc_dying) 810 return (EIO); 811 812 /* Check requested parameters. */ 813 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 814 return (EINVAL); 815 816 /* 817 * For the console, always force CLOCAL and !HUPCL, so that the port 818 * is always active. 819 */ 820 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 821 SET(t->c_cflag, CLOCAL); 822 CLR(t->c_cflag, HUPCL); 823 } 824 825 /* 826 * If there were no changes, don't do anything. This avoids dropping 827 * input and improves performance when all we did was frob things like 828 * VMIN and VTIME. 829 */ 830 if (tp->t_ospeed == t->c_ospeed && 831 tp->t_cflag == t->c_cflag) 832 return (0); 833 834 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 835 836 /* And copy to tty. */ 837 tp->t_ispeed = 0; 838 tp->t_ospeed = t->c_ospeed; 839 tp->t_cflag = t->c_cflag; 840 841 if (sc->sc_methods->ucom_param != NULL) { 842 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 843 t); 844 if (error) 845 return (error); 846 } 847 848 /* XXX worry about CHWFLOW */ 849 850 /* 851 * Update the tty layer's idea of the carrier bit, in case we changed 852 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 853 * explicit request. 854 */ 855 DPRINTF(("ucomparam: l_modem\n")); 856 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 857 858 #if 0 859 XXX what if the hardware is not open 860 if (!ISSET(t->c_cflag, CHWFLOW)) { 861 if (sc->sc_tx_stopped) { 862 sc->sc_tx_stopped = 0; 863 ucomstart(tp); 864 } 865 } 866 #endif 867 868 return (0); 869 } 870 871 /* 872 * (un)block input via hw flowcontrol 873 */ 874 Static void 875 ucom_hwiflow(struct ucom_softc *sc) 876 { 877 DPRINTF(("ucom_hwiflow:\n")); 878 #if 0 879 XXX 880 bus_space_tag_t iot = sc->sc_iot; 881 bus_space_handle_t ioh = sc->sc_ioh; 882 883 if (sc->sc_mcr_rts == 0) 884 return; 885 886 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 887 CLR(sc->sc_mcr, sc->sc_mcr_rts); 888 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 889 } else { 890 SET(sc->sc_mcr, sc->sc_mcr_rts); 891 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 892 } 893 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 894 #endif 895 } 896 897 Static void 898 ucomstart(struct tty *tp) 899 { 900 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 901 usbd_status err; 902 int s; 903 u_char *data; 904 int cnt; 905 906 if (sc->sc_dying) 907 return; 908 909 s = spltty(); 910 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 911 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 912 goto out; 913 } 914 if (sc->sc_tx_stopped) 915 goto out; 916 917 if (tp->t_outq.c_cc <= tp->t_lowat) { 918 if (ISSET(tp->t_state, TS_ASLEEP)) { 919 CLR(tp->t_state, TS_ASLEEP); 920 wakeup(&tp->t_outq); 921 } 922 selwakeup(&tp->t_wsel); 923 if (tp->t_outq.c_cc == 0) 924 goto out; 925 } 926 927 /* Grab the first contiguous region of buffer space. */ 928 data = tp->t_outq.c_cf; 929 cnt = ndqb(&tp->t_outq, 0); 930 931 if (cnt == 0) { 932 DPRINTF(("ucomstart: cnt==0\n")); 933 goto out; 934 } 935 936 SET(tp->t_state, TS_BUSY); 937 938 if (cnt > sc->sc_obufsize) { 939 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 940 cnt = sc->sc_obufsize; 941 } 942 if (sc->sc_methods->ucom_write != NULL) 943 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 944 sc->sc_obuf, data, &cnt); 945 else 946 memcpy(sc->sc_obuf, data, cnt); 947 948 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 949 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 950 (usbd_private_handle)sc, sc->sc_obuf, cnt, 951 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 952 /* What can we do on error? */ 953 err = usbd_transfer(sc->sc_oxfer); 954 #ifdef DIAGNOSTIC 955 if (err != USBD_IN_PROGRESS) 956 printf("ucomstart: err=%s\n", usbd_errstr(err)); 957 #endif 958 959 out: 960 splx(s); 961 } 962 963 void 964 ucomstop(struct tty *tp, int flag) 965 { 966 DPRINTF(("ucomstop: flag=%d\n", flag)); 967 #if 0 968 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 969 int s; 970 971 s = spltty(); 972 if (ISSET(tp->t_state, TS_BUSY)) { 973 DPRINTF(("ucomstop: XXX\n")); 974 /* sc->sc_tx_stopped = 1; */ 975 if (!ISSET(tp->t_state, TS_TTSTOP)) 976 SET(tp->t_state, TS_FLUSH); 977 } 978 splx(s); 979 #endif 980 } 981 982 Static void 983 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 984 { 985 struct ucom_softc *sc = (struct ucom_softc *)p; 986 struct tty *tp = sc->sc_tty; 987 u_int32_t cc; 988 int s; 989 990 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 991 992 if (status == USBD_CANCELLED || sc->sc_dying) 993 goto error; 994 995 if (status) { 996 DPRINTF(("ucomwritecb: status=%d\n", status)); 997 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 998 /* XXX we should restart after some delay. */ 999 goto error; 1000 } 1001 1002 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 1003 #if defined(__NetBSD__) && NRND > 0 1004 rnd_add_uint32(&sc->sc_rndsource, cc); 1005 #endif 1006 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 1007 /* convert from USB bytes to tty bytes */ 1008 cc -= sc->sc_opkthdrlen; 1009 1010 s = spltty(); 1011 CLR(tp->t_state, TS_BUSY); 1012 if (ISSET(tp->t_state, TS_FLUSH)) 1013 CLR(tp->t_state, TS_FLUSH); 1014 else 1015 ndflush(&tp->t_outq, cc); 1016 (*tp->t_linesw->l_start)(tp); 1017 splx(s); 1018 return; 1019 1020 error: 1021 s = spltty(); 1022 CLR(tp->t_state, TS_BUSY); 1023 splx(s); 1024 } 1025 1026 Static usbd_status 1027 ucomstartread(struct ucom_softc *sc) 1028 { 1029 usbd_status err; 1030 1031 DPRINTFN(5,("ucomstartread: start\n")); 1032 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1033 (usbd_private_handle)sc, 1034 sc->sc_ibuf, sc->sc_ibufsize, 1035 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1036 USBD_NO_TIMEOUT, ucomreadcb); 1037 err = usbd_transfer(sc->sc_ixfer); 1038 if (err != USBD_IN_PROGRESS) { 1039 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1040 return (err); 1041 } 1042 return (USBD_NORMAL_COMPLETION); 1043 } 1044 1045 Static void 1046 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1047 { 1048 struct ucom_softc *sc = (struct ucom_softc *)p; 1049 struct tty *tp = sc->sc_tty; 1050 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1051 usbd_status err; 1052 u_int32_t cc; 1053 u_char *cp; 1054 int s; 1055 1056 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1057 1058 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1059 sc->sc_dying) { 1060 DPRINTF(("ucomreadcb: dying\n")); 1061 /* Send something to wake upper layer */ 1062 s = spltty(); 1063 (*rint)('\n', tp); 1064 ttwakeup(tp); 1065 splx(s); 1066 return; 1067 } 1068 1069 if (status) { 1070 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1071 /* XXX we should restart after some delay. */ 1072 return; 1073 } 1074 1075 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1076 #if defined(__NetBSD__) && NRND > 0 1077 rnd_add_uint32(&sc->sc_rndsource, cc); 1078 #endif 1079 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1080 if (sc->sc_methods->ucom_read != NULL) 1081 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1082 &cp, &cc); 1083 1084 s = spltty(); 1085 /* Give characters to tty layer. */ 1086 while (cc-- > 0) { 1087 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1088 if ((*rint)(*cp++, tp) == -1) { 1089 /* XXX what should we do? */ 1090 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1091 cc); 1092 break; 1093 } 1094 } 1095 splx(s); 1096 1097 err = ucomstartread(sc); 1098 if (err) { 1099 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1100 /* XXX what should we dow now? */ 1101 } 1102 } 1103 1104 Static void 1105 ucom_cleanup(struct ucom_softc *sc) 1106 { 1107 DPRINTF(("ucom_cleanup: closing pipes\n")); 1108 1109 ucom_shutdown(sc); 1110 if (sc->sc_bulkin_pipe != NULL) { 1111 usbd_abort_pipe(sc->sc_bulkin_pipe); 1112 usbd_close_pipe(sc->sc_bulkin_pipe); 1113 sc->sc_bulkin_pipe = NULL; 1114 } 1115 if (sc->sc_bulkout_pipe != NULL) { 1116 usbd_abort_pipe(sc->sc_bulkout_pipe); 1117 usbd_close_pipe(sc->sc_bulkout_pipe); 1118 sc->sc_bulkout_pipe = NULL; 1119 } 1120 if (sc->sc_ixfer != NULL) { 1121 usbd_free_xfer(sc->sc_ixfer); 1122 sc->sc_ixfer = NULL; 1123 } 1124 if (sc->sc_oxfer != NULL) { 1125 usbd_free_xfer(sc->sc_oxfer); 1126 sc->sc_oxfer = NULL; 1127 } 1128 } 1129 1130 #endif /* NUCOM > 0 */ 1131 1132 int 1133 ucomprint(void *aux, const char *pnp) 1134 { 1135 struct ucom_attach_args *uca = aux; 1136 1137 if (pnp) 1138 aprint_normal("ucom at %s", pnp); 1139 if (uca->portno != UCOM_UNK_PORTNO) 1140 aprint_normal(" portno %d", uca->portno); 1141 return (UNCONF); 1142 } 1143 1144 int 1145 ucomsubmatch(struct device *parent, struct cfdata *cf, 1146 const int *ldesc, void *aux) 1147 { 1148 struct ucom_attach_args *uca = aux; 1149 1150 if (uca->portno != UCOM_UNK_PORTNO && 1151 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1152 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1153 return (0); 1154 return (config_match(parent, cf, aux)); 1155 } 1156