1 /* $NetBSD: ucom.c,v 1.76 2008/04/28 20:23:59 martin 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 * 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 1.76 2008/04/28 20:23:59 martin 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/kauth.h> 52 #if defined(__NetBSD__) 53 #include "rnd.h" 54 #if NRND > 0 55 #include <sys/rnd.h> 56 #endif 57 #endif 58 59 #include <dev/usb/usb.h> 60 61 #include <dev/usb/usbdi.h> 62 #include <dev/usb/usbdi_util.h> 63 #include <dev/usb/usbdevs.h> 64 #include <dev/usb/usb_quirks.h> 65 66 #include <dev/usb/ucomvar.h> 67 68 #include "ucom.h" 69 70 #include "locators.h" 71 72 #if NUCOM > 0 73 74 #ifdef UCOM_DEBUG 75 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 76 int ucomdebug = 0; 77 #else 78 #define DPRINTFN(n, x) 79 #endif 80 #define DPRINTF(x) DPRINTFN(0, x) 81 82 #define UCOMUNIT_MASK 0x3ffff 83 #define UCOMDIALOUT_MASK 0x80000 84 #define UCOMCALLUNIT_MASK 0x40000 85 86 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 87 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 88 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 89 90 struct ucom_softc { 91 USBBASEDEVICE sc_dev; /* base device */ 92 93 usbd_device_handle sc_udev; /* USB device */ 94 95 usbd_interface_handle sc_iface; /* data interface */ 96 97 int sc_bulkin_no; /* bulk in endpoint address */ 98 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 99 usbd_xfer_handle sc_ixfer; /* read request */ 100 u_char *sc_ibuf; /* read buffer */ 101 u_int sc_ibufsize; /* read buffer size */ 102 u_int sc_ibufsizepad; /* read buffer size padded */ 103 104 int sc_bulkout_no; /* bulk out endpoint address */ 105 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 106 usbd_xfer_handle sc_oxfer; /* write request */ 107 u_char *sc_obuf; /* write buffer */ 108 u_int sc_obufsize; /* write buffer size */ 109 u_int sc_opkthdrlen; /* header length of 110 * output packet */ 111 112 struct ucom_methods *sc_methods; 113 void *sc_parent; 114 int sc_portno; 115 116 struct tty *sc_tty; /* our tty */ 117 u_char sc_lsr; 118 u_char sc_msr; 119 u_char sc_mcr; 120 u_char sc_tx_stopped; 121 int sc_swflags; 122 123 u_char sc_opening; /* lock during open */ 124 int sc_refcnt; 125 u_char sc_dying; /* disconnecting */ 126 127 #if defined(__NetBSD__) && NRND > 0 128 rndsource_element_t sc_rndsource; /* random source */ 129 #endif 130 }; 131 132 dev_type_open(ucomopen); 133 dev_type_close(ucomclose); 134 dev_type_read(ucomread); 135 dev_type_write(ucomwrite); 136 dev_type_ioctl(ucomioctl); 137 dev_type_stop(ucomstop); 138 dev_type_tty(ucomtty); 139 dev_type_poll(ucompoll); 140 141 const struct cdevsw ucom_cdevsw = { 142 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 143 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 144 }; 145 146 Static void ucom_cleanup(struct ucom_softc *); 147 Static void ucom_hwiflow(struct ucom_softc *); 148 Static int ucomparam(struct tty *, struct termios *); 149 Static void ucomstart(struct tty *); 150 Static void ucom_shutdown(struct ucom_softc *); 151 Static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 152 int, struct lwp *); 153 Static void ucom_dtr(struct ucom_softc *, int); 154 Static void ucom_rts(struct ucom_softc *, int); 155 Static void ucom_break(struct ucom_softc *, int); 156 Static usbd_status ucomstartread(struct ucom_softc *); 157 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 158 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 159 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 160 Static int ucom_to_tiocm(struct ucom_softc *); 161 162 USB_DECLARE_DRIVER(ucom); 163 164 USB_MATCH(ucom) 165 { 166 return (1); 167 } 168 169 USB_ATTACH(ucom) 170 { 171 struct ucom_softc *sc = (struct ucom_softc *)self; 172 struct ucom_attach_args *uca = aux; 173 struct tty *tp; 174 175 if (uca->info != NULL) 176 printf(": %s", uca->info); 177 printf("\n"); 178 179 sc->sc_udev = uca->device; 180 sc->sc_iface = uca->iface; 181 sc->sc_bulkout_no = uca->bulkout; 182 sc->sc_bulkin_no = uca->bulkin; 183 sc->sc_ibufsize = uca->ibufsize; 184 sc->sc_ibufsizepad = uca->ibufsizepad; 185 sc->sc_obufsize = uca->obufsize; 186 sc->sc_opkthdrlen = uca->opkthdrlen; 187 sc->sc_methods = uca->methods; 188 sc->sc_parent = uca->arg; 189 sc->sc_portno = uca->portno; 190 191 tp = ttymalloc(); 192 tp->t_oproc = ucomstart; 193 tp->t_param = ucomparam; 194 sc->sc_tty = tp; 195 196 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 197 tty_attach(tp); 198 199 #if defined(__NetBSD__) && NRND > 0 200 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 201 RND_TYPE_TTY, 0); 202 #endif 203 204 if (!pmf_device_register(self, NULL, NULL)) 205 aprint_error_dev(self, "couldn't establish power handler\n"); 206 USB_ATTACH_SUCCESS_RETURN; 207 } 208 209 USB_DETACH(ucom) 210 { 211 struct ucom_softc *sc = (struct ucom_softc *)self; 212 struct tty *tp = sc->sc_tty; 213 int maj, mn; 214 int s; 215 216 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 217 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 218 219 sc->sc_dying = 1; 220 pmf_device_deregister(self); 221 222 if (sc->sc_bulkin_pipe != NULL) 223 usbd_abort_pipe(sc->sc_bulkin_pipe); 224 if (sc->sc_bulkout_pipe != NULL) 225 usbd_abort_pipe(sc->sc_bulkout_pipe); 226 227 s = splusb(); 228 if (--sc->sc_refcnt >= 0) { 229 /* Wake up anyone waiting */ 230 if (tp != NULL) { 231 mutex_spin_enter(&tty_lock); 232 CLR(tp->t_state, TS_CARR_ON); 233 CLR(tp->t_cflag, CLOCAL | MDMBUF); 234 ttyflush(tp, FREAD|FWRITE); 235 mutex_spin_exit(&tty_lock); 236 } 237 /* Wait for processes to go away. */ 238 usb_detach_wait(USBDEV(sc->sc_dev)); 239 } 240 splx(s); 241 242 /* locate the major number */ 243 maj = cdevsw_lookup_major(&ucom_cdevsw); 244 245 /* Nuke the vnodes for any open instances. */ 246 mn = device_unit(self); 247 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 248 vdevgone(maj, mn, mn, VCHR); 249 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 250 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 251 252 /* Detach and free the tty. */ 253 if (tp != NULL) { 254 tty_detach(tp); 255 ttyfree(tp); 256 sc->sc_tty = NULL; 257 } 258 259 /* Detach the random source */ 260 #if defined(__NetBSD__) && NRND > 0 261 rnd_detach_source(&sc->sc_rndsource); 262 #endif 263 264 return (0); 265 } 266 267 int 268 ucom_activate(device_ptr_t self, enum devact act) 269 { 270 struct ucom_softc *sc = (struct ucom_softc *)self; 271 272 DPRINTFN(5,("ucom_activate: %d\n", act)); 273 274 switch (act) { 275 case DVACT_ACTIVATE: 276 return (EOPNOTSUPP); 277 278 case DVACT_DEACTIVATE: 279 sc->sc_dying = 1; 280 break; 281 } 282 return (0); 283 } 284 285 void 286 ucom_shutdown(struct ucom_softc *sc) 287 { 288 struct tty *tp = sc->sc_tty; 289 290 DPRINTF(("ucom_shutdown\n")); 291 /* 292 * Hang up if necessary. Wait a bit, so the other side has time to 293 * notice even if we immediately open the port again. 294 */ 295 if (ISSET(tp->t_cflag, HUPCL)) { 296 ucom_dtr(sc, 0); 297 (void)tsleep(sc, TTIPRI, ttclos, hz); 298 } 299 } 300 301 int 302 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 303 { 304 int unit = UCOMUNIT(dev); 305 usbd_status err; 306 struct ucom_softc *sc; 307 struct tty *tp; 308 int s; 309 int error; 310 311 if (unit >= ucom_cd.cd_ndevs) 312 return (ENXIO); 313 sc = ucom_cd.cd_devs[unit]; 314 if (sc == NULL) 315 return (ENXIO); 316 317 if (sc->sc_dying) 318 return (EIO); 319 320 if (!device_is_active(&sc->sc_dev)) 321 return (ENXIO); 322 323 tp = sc->sc_tty; 324 325 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 326 327 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 328 return (EBUSY); 329 330 s = spltty(); 331 332 /* 333 * Do the following iff this is a first open. 334 */ 335 while (sc->sc_opening) 336 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 337 338 if (sc->sc_dying) { 339 splx(s); 340 return (EIO); 341 } 342 sc->sc_opening = 1; 343 344 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 345 struct termios t; 346 347 tp->t_dev = dev; 348 349 if (sc->sc_methods->ucom_open != NULL) { 350 error = sc->sc_methods->ucom_open(sc->sc_parent, 351 sc->sc_portno); 352 if (error) { 353 ucom_cleanup(sc); 354 sc->sc_opening = 0; 355 wakeup(&sc->sc_opening); 356 splx(s); 357 return (error); 358 } 359 } 360 361 ucom_status_change(sc); 362 363 /* 364 * Initialize the termios status to the defaults. Add in the 365 * sticky bits from TIOCSFLAGS. 366 */ 367 t.c_ispeed = 0; 368 t.c_ospeed = TTYDEF_SPEED; 369 t.c_cflag = TTYDEF_CFLAG; 370 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 371 SET(t.c_cflag, CLOCAL); 372 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 373 SET(t.c_cflag, CRTSCTS); 374 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 375 SET(t.c_cflag, MDMBUF); 376 /* Make sure ucomparam() will do something. */ 377 tp->t_ospeed = 0; 378 (void) ucomparam(tp, &t); 379 tp->t_iflag = TTYDEF_IFLAG; 380 tp->t_oflag = TTYDEF_OFLAG; 381 tp->t_lflag = TTYDEF_LFLAG; 382 ttychars(tp); 383 ttsetwater(tp); 384 385 /* 386 * Turn on DTR. We must always do this, even if carrier is not 387 * present, because otherwise we'd have to use TIOCSDTR 388 * immediately after setting CLOCAL, which applications do not 389 * expect. We always assert DTR while the device is open 390 * unless explicitly requested to deassert it. Ditto RTS. 391 */ 392 ucom_dtr(sc, 1); 393 ucom_rts(sc, 1); 394 395 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 396 ucom_hwiflow(sc); 397 398 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 399 sc->sc_bulkin_no, sc->sc_bulkout_no)); 400 401 /* Open the bulk pipes */ 402 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 403 &sc->sc_bulkin_pipe); 404 if (err) { 405 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 406 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 407 usbd_errstr(err))); 408 error = EIO; 409 goto fail_0; 410 } 411 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 412 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 413 if (err) { 414 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 415 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 416 usbd_errstr(err))); 417 error = EIO; 418 goto fail_1; 419 } 420 421 /* Allocate a request and an input buffer and start reading. */ 422 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 423 if (sc->sc_ixfer == NULL) { 424 error = ENOMEM; 425 goto fail_2; 426 } 427 428 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 429 sc->sc_ibufsizepad); 430 if (sc->sc_ibuf == NULL) { 431 error = ENOMEM; 432 goto fail_3; 433 } 434 435 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 436 if (sc->sc_oxfer == NULL) { 437 error = ENOMEM; 438 goto fail_3; 439 } 440 441 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 442 sc->sc_obufsize + 443 sc->sc_opkthdrlen); 444 if (sc->sc_obuf == NULL) { 445 error = ENOMEM; 446 goto fail_4; 447 } 448 449 ucomstartread(sc); 450 } 451 sc->sc_opening = 0; 452 wakeup(&sc->sc_opening); 453 splx(s); 454 455 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 456 if (error) 457 goto bad; 458 459 error = (*tp->t_linesw->l_open)(dev, tp); 460 if (error) 461 goto bad; 462 463 return (0); 464 465 fail_4: 466 usbd_free_xfer(sc->sc_oxfer); 467 sc->sc_oxfer = NULL; 468 fail_3: 469 usbd_free_xfer(sc->sc_ixfer); 470 sc->sc_ixfer = NULL; 471 fail_2: 472 usbd_close_pipe(sc->sc_bulkout_pipe); 473 sc->sc_bulkout_pipe = NULL; 474 fail_1: 475 usbd_close_pipe(sc->sc_bulkin_pipe); 476 sc->sc_bulkin_pipe = NULL; 477 fail_0: 478 sc->sc_opening = 0; 479 wakeup(&sc->sc_opening); 480 splx(s); 481 return (error); 482 483 bad: 484 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 485 /* 486 * We failed to open the device, and nobody else had it opened. 487 * Clean up the state as appropriate. 488 */ 489 ucom_cleanup(sc); 490 } 491 492 return (error); 493 } 494 495 int 496 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 497 { 498 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 499 struct tty *tp = sc->sc_tty; 500 501 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 502 if (!ISSET(tp->t_state, TS_ISOPEN)) 503 return (0); 504 505 sc->sc_refcnt++; 506 507 (*tp->t_linesw->l_close)(tp, flag); 508 ttyclose(tp); 509 510 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 511 /* 512 * Although we got a last close, the device may still be in 513 * use; e.g. if this was the dialout node, and there are still 514 * processes waiting for carrier on the non-dialout node. 515 */ 516 ucom_cleanup(sc); 517 } 518 519 if (sc->sc_methods->ucom_close != NULL) 520 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 521 522 if (--sc->sc_refcnt < 0) 523 usb_detach_wakeup(USBDEV(sc->sc_dev)); 524 525 return (0); 526 } 527 528 int 529 ucomread(dev_t dev, struct uio *uio, int flag) 530 { 531 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 532 struct tty *tp = sc->sc_tty; 533 int error; 534 535 if (sc->sc_dying) 536 return (EIO); 537 538 sc->sc_refcnt++; 539 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 540 if (--sc->sc_refcnt < 0) 541 usb_detach_wakeup(USBDEV(sc->sc_dev)); 542 return (error); 543 } 544 545 int 546 ucomwrite(dev_t dev, struct uio *uio, int flag) 547 { 548 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 549 struct tty *tp = sc->sc_tty; 550 int error; 551 552 if (sc->sc_dying) 553 return (EIO); 554 555 sc->sc_refcnt++; 556 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 557 if (--sc->sc_refcnt < 0) 558 usb_detach_wakeup(USBDEV(sc->sc_dev)); 559 return (error); 560 } 561 562 int 563 ucompoll(dev_t dev, int events, struct lwp *l) 564 { 565 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 566 struct tty *tp = sc->sc_tty; 567 int revents; 568 569 if (sc->sc_dying) 570 return (POLLHUP); 571 572 sc->sc_refcnt++; 573 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 574 if (--sc->sc_refcnt < 0) 575 usb_detach_wakeup(USBDEV(sc->sc_dev)); 576 return (revents); 577 } 578 579 struct tty * 580 ucomtty(dev_t dev) 581 { 582 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 583 struct tty *tp = sc->sc_tty; 584 585 return (tp); 586 } 587 588 int 589 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 590 { 591 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 592 int error; 593 594 sc->sc_refcnt++; 595 error = ucom_do_ioctl(sc, cmd, data, flag, l); 596 if (--sc->sc_refcnt < 0) 597 usb_detach_wakeup(USBDEV(sc->sc_dev)); 598 return (error); 599 } 600 601 Static int 602 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 603 int flag, struct lwp *l) 604 { 605 struct tty *tp = sc->sc_tty; 606 int error; 607 int s; 608 609 if (sc->sc_dying) 610 return (EIO); 611 612 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 613 614 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 615 if (error != EPASSTHROUGH) 616 return (error); 617 618 error = ttioctl(tp, cmd, data, flag, l); 619 if (error != EPASSTHROUGH) 620 return (error); 621 622 if (sc->sc_methods->ucom_ioctl != NULL) { 623 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 624 sc->sc_portno, cmd, data, flag, l->l_proc); 625 if (error != EPASSTHROUGH) 626 return (error); 627 } 628 629 error = 0; 630 631 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 632 s = spltty(); 633 634 switch (cmd) { 635 case TIOCSBRK: 636 ucom_break(sc, 1); 637 break; 638 639 case TIOCCBRK: 640 ucom_break(sc, 0); 641 break; 642 643 case TIOCSDTR: 644 ucom_dtr(sc, 1); 645 break; 646 647 case TIOCCDTR: 648 ucom_dtr(sc, 0); 649 break; 650 651 case TIOCGFLAGS: 652 *(int *)data = sc->sc_swflags; 653 break; 654 655 case TIOCSFLAGS: 656 error = kauth_authorize_device_tty(l->l_cred, 657 KAUTH_DEVICE_TTY_PRIVSET, tp); 658 if (error) 659 break; 660 sc->sc_swflags = *(int *)data; 661 break; 662 663 case TIOCMSET: 664 case TIOCMBIS: 665 case TIOCMBIC: 666 tiocm_to_ucom(sc, cmd, *(int *)data); 667 break; 668 669 case TIOCMGET: 670 *(int *)data = ucom_to_tiocm(sc); 671 break; 672 673 default: 674 error = EPASSTHROUGH; 675 break; 676 } 677 678 splx(s); 679 680 return (error); 681 } 682 683 Static void 684 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 685 { 686 u_char combits; 687 688 combits = 0; 689 if (ISSET(ttybits, TIOCM_DTR)) 690 SET(combits, UMCR_DTR); 691 if (ISSET(ttybits, TIOCM_RTS)) 692 SET(combits, UMCR_RTS); 693 694 switch (how) { 695 case TIOCMBIC: 696 CLR(sc->sc_mcr, combits); 697 break; 698 699 case TIOCMBIS: 700 SET(sc->sc_mcr, combits); 701 break; 702 703 case TIOCMSET: 704 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 705 SET(sc->sc_mcr, combits); 706 break; 707 } 708 709 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 710 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 711 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 712 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 713 } 714 715 Static int 716 ucom_to_tiocm(struct ucom_softc *sc) 717 { 718 u_char combits; 719 int ttybits = 0; 720 721 combits = sc->sc_mcr; 722 if (ISSET(combits, UMCR_DTR)) 723 SET(ttybits, TIOCM_DTR); 724 if (ISSET(combits, UMCR_RTS)) 725 SET(ttybits, TIOCM_RTS); 726 727 combits = sc->sc_msr; 728 if (ISSET(combits, UMSR_DCD)) 729 SET(ttybits, TIOCM_CD); 730 if (ISSET(combits, UMSR_CTS)) 731 SET(ttybits, TIOCM_CTS); 732 if (ISSET(combits, UMSR_DSR)) 733 SET(ttybits, TIOCM_DSR); 734 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 735 SET(ttybits, TIOCM_RI); 736 737 #if 0 738 XXX; 739 if (sc->sc_ier != 0) 740 SET(ttybits, TIOCM_LE); 741 #endif 742 743 return (ttybits); 744 } 745 746 Static void 747 ucom_break(sc, onoff) 748 struct ucom_softc *sc; 749 int onoff; 750 { 751 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 752 753 if (sc->sc_methods->ucom_set != NULL) 754 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 755 UCOM_SET_BREAK, onoff); 756 } 757 758 Static void 759 ucom_dtr(struct ucom_softc *sc, int onoff) 760 { 761 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 762 763 if (sc->sc_methods->ucom_set != NULL) 764 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 765 UCOM_SET_DTR, onoff); 766 } 767 768 Static void 769 ucom_rts(struct ucom_softc *sc, int onoff) 770 { 771 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 772 773 if (sc->sc_methods->ucom_set != NULL) 774 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 775 UCOM_SET_RTS, onoff); 776 } 777 778 void 779 ucom_status_change(struct ucom_softc *sc) 780 { 781 struct tty *tp = sc->sc_tty; 782 u_char old_msr; 783 784 if (sc->sc_methods->ucom_get_status != NULL) { 785 old_msr = sc->sc_msr; 786 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 787 &sc->sc_lsr, &sc->sc_msr); 788 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 789 (*tp->t_linesw->l_modem)(tp, 790 ISSET(sc->sc_msr, UMSR_DCD)); 791 } else { 792 sc->sc_lsr = 0; 793 /* Assume DCD is present, if we have no chance to check it. */ 794 sc->sc_msr = UMSR_DCD; 795 } 796 } 797 798 Static int 799 ucomparam(struct tty *tp, struct termios *t) 800 { 801 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 802 int error; 803 804 if (sc->sc_dying) 805 return (EIO); 806 807 /* Check requested parameters. */ 808 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 809 return (EINVAL); 810 811 /* 812 * For the console, always force CLOCAL and !HUPCL, so that the port 813 * is always active. 814 */ 815 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 816 SET(t->c_cflag, CLOCAL); 817 CLR(t->c_cflag, HUPCL); 818 } 819 820 /* 821 * If there were no changes, don't do anything. This avoids dropping 822 * input and improves performance when all we did was frob things like 823 * VMIN and VTIME. 824 */ 825 if (tp->t_ospeed == t->c_ospeed && 826 tp->t_cflag == t->c_cflag) 827 return (0); 828 829 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 830 831 /* And copy to tty. */ 832 tp->t_ispeed = 0; 833 tp->t_ospeed = t->c_ospeed; 834 tp->t_cflag = t->c_cflag; 835 836 if (sc->sc_methods->ucom_param != NULL) { 837 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 838 t); 839 if (error) 840 return (error); 841 } 842 843 /* XXX worry about CHWFLOW */ 844 845 /* 846 * Update the tty layer's idea of the carrier bit, in case we changed 847 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 848 * explicit request. 849 */ 850 DPRINTF(("ucomparam: l_modem\n")); 851 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 852 853 #if 0 854 XXX what if the hardware is not open 855 if (!ISSET(t->c_cflag, CHWFLOW)) { 856 if (sc->sc_tx_stopped) { 857 sc->sc_tx_stopped = 0; 858 ucomstart(tp); 859 } 860 } 861 #endif 862 863 return (0); 864 } 865 866 /* 867 * (un)block input via hw flowcontrol 868 */ 869 Static void 870 ucom_hwiflow(struct ucom_softc *sc) 871 { 872 DPRINTF(("ucom_hwiflow:\n")); 873 #if 0 874 XXX 875 bus_space_tag_t iot = sc->sc_iot; 876 bus_space_handle_t ioh = sc->sc_ioh; 877 878 if (sc->sc_mcr_rts == 0) 879 return; 880 881 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 882 CLR(sc->sc_mcr, sc->sc_mcr_rts); 883 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 884 } else { 885 SET(sc->sc_mcr, sc->sc_mcr_rts); 886 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 887 } 888 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 889 #endif 890 } 891 892 Static void 893 ucomstart(struct tty *tp) 894 { 895 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 896 usbd_status err; 897 int s; 898 u_char *data; 899 int cnt; 900 901 if (sc->sc_dying) 902 return; 903 904 s = spltty(); 905 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 906 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 907 goto out; 908 } 909 if (sc->sc_tx_stopped) 910 goto out; 911 912 if (!ttypull(tp)) 913 goto out; 914 915 /* Grab the first contiguous region of buffer space. */ 916 data = tp->t_outq.c_cf; 917 cnt = ndqb(&tp->t_outq, 0); 918 919 if (cnt == 0) { 920 DPRINTF(("ucomstart: cnt==0\n")); 921 goto out; 922 } 923 924 SET(tp->t_state, TS_BUSY); 925 926 if (cnt > sc->sc_obufsize) { 927 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 928 cnt = sc->sc_obufsize; 929 } 930 if (sc->sc_methods->ucom_write != NULL) 931 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 932 sc->sc_obuf, data, &cnt); 933 else 934 memcpy(sc->sc_obuf, data, cnt); 935 936 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 937 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 938 (usbd_private_handle)sc, sc->sc_obuf, cnt, 939 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 940 /* What can we do on error? */ 941 err = usbd_transfer(sc->sc_oxfer); 942 #ifdef DIAGNOSTIC 943 if (err != USBD_IN_PROGRESS) 944 printf("ucomstart: err=%s\n", usbd_errstr(err)); 945 #endif 946 947 out: 948 splx(s); 949 } 950 951 void 952 ucomstop(struct tty *tp, int flag) 953 { 954 DPRINTF(("ucomstop: flag=%d\n", flag)); 955 #if 0 956 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 957 int s; 958 959 s = spltty(); 960 if (ISSET(tp->t_state, TS_BUSY)) { 961 DPRINTF(("ucomstop: XXX\n")); 962 /* sc->sc_tx_stopped = 1; */ 963 if (!ISSET(tp->t_state, TS_TTSTOP)) 964 SET(tp->t_state, TS_FLUSH); 965 } 966 splx(s); 967 #endif 968 } 969 970 Static void 971 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 972 { 973 struct ucom_softc *sc = (struct ucom_softc *)p; 974 struct tty *tp = sc->sc_tty; 975 u_int32_t cc; 976 int s; 977 978 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 979 980 if (status == USBD_CANCELLED || sc->sc_dying) 981 goto error; 982 983 if (status) { 984 DPRINTF(("ucomwritecb: status=%d\n", status)); 985 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 986 /* XXX we should restart after some delay. */ 987 goto error; 988 } 989 990 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 991 #if defined(__NetBSD__) && NRND > 0 992 rnd_add_uint32(&sc->sc_rndsource, cc); 993 #endif 994 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 995 /* convert from USB bytes to tty bytes */ 996 cc -= sc->sc_opkthdrlen; 997 998 s = spltty(); 999 CLR(tp->t_state, TS_BUSY); 1000 if (ISSET(tp->t_state, TS_FLUSH)) 1001 CLR(tp->t_state, TS_FLUSH); 1002 else 1003 ndflush(&tp->t_outq, cc); 1004 (*tp->t_linesw->l_start)(tp); 1005 splx(s); 1006 return; 1007 1008 error: 1009 s = spltty(); 1010 CLR(tp->t_state, TS_BUSY); 1011 splx(s); 1012 } 1013 1014 Static usbd_status 1015 ucomstartread(struct ucom_softc *sc) 1016 { 1017 usbd_status err; 1018 1019 DPRINTFN(5,("ucomstartread: start\n")); 1020 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1021 (usbd_private_handle)sc, 1022 sc->sc_ibuf, sc->sc_ibufsize, 1023 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1024 USBD_NO_TIMEOUT, ucomreadcb); 1025 err = usbd_transfer(sc->sc_ixfer); 1026 if (err != USBD_IN_PROGRESS) { 1027 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1028 return (err); 1029 } 1030 return (USBD_NORMAL_COMPLETION); 1031 } 1032 1033 Static void 1034 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1035 { 1036 struct ucom_softc *sc = (struct ucom_softc *)p; 1037 struct tty *tp = sc->sc_tty; 1038 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1039 usbd_status err; 1040 u_int32_t cc; 1041 u_char *cp; 1042 int s; 1043 1044 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1045 1046 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1047 sc->sc_dying) { 1048 DPRINTF(("ucomreadcb: dying\n")); 1049 /* Send something to wake upper layer */ 1050 s = spltty(); 1051 (*rint)('\n', tp); 1052 mutex_spin_enter(&tty_lock); /* XXX */ 1053 ttwakeup(tp); 1054 mutex_spin_exit(&tty_lock); /* XXX */ 1055 splx(s); 1056 return; 1057 } 1058 1059 if (status) { 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 #if defined(__NetBSD__) && NRND > 0 1067 rnd_add_uint32(&sc->sc_rndsource, cc); 1068 #endif 1069 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1070 if (sc->sc_methods->ucom_read != NULL) 1071 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1072 &cp, &cc); 1073 1074 s = spltty(); 1075 /* Give characters to tty layer. */ 1076 while (cc-- > 0) { 1077 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1078 if ((*rint)(*cp++, tp) == -1) { 1079 /* XXX what should we do? */ 1080 aprint_error_dev(&sc->sc_dev, "lost %d chars\n", 1081 cc); 1082 break; 1083 } 1084 } 1085 splx(s); 1086 1087 err = ucomstartread(sc); 1088 if (err) { 1089 aprint_error_dev(&sc->sc_dev, "read start failed\n"); 1090 /* XXX what should we dow now? */ 1091 } 1092 } 1093 1094 Static void 1095 ucom_cleanup(struct ucom_softc *sc) 1096 { 1097 DPRINTF(("ucom_cleanup: closing pipes\n")); 1098 1099 ucom_shutdown(sc); 1100 if (sc->sc_bulkin_pipe != NULL) { 1101 usbd_abort_pipe(sc->sc_bulkin_pipe); 1102 usbd_close_pipe(sc->sc_bulkin_pipe); 1103 sc->sc_bulkin_pipe = NULL; 1104 } 1105 if (sc->sc_bulkout_pipe != NULL) { 1106 usbd_abort_pipe(sc->sc_bulkout_pipe); 1107 usbd_close_pipe(sc->sc_bulkout_pipe); 1108 sc->sc_bulkout_pipe = NULL; 1109 } 1110 if (sc->sc_ixfer != NULL) { 1111 usbd_free_xfer(sc->sc_ixfer); 1112 sc->sc_ixfer = NULL; 1113 } 1114 if (sc->sc_oxfer != NULL) { 1115 usbd_free_xfer(sc->sc_oxfer); 1116 sc->sc_oxfer = NULL; 1117 } 1118 } 1119 1120 #endif /* NUCOM > 0 */ 1121 1122 int 1123 ucomprint(void *aux, const char *pnp) 1124 { 1125 struct ucom_attach_args *uca = aux; 1126 1127 if (pnp) 1128 aprint_normal("ucom at %s", pnp); 1129 if (uca->portno != UCOM_UNK_PORTNO) 1130 aprint_normal(" portno %d", uca->portno); 1131 return (UNCONF); 1132 } 1133 1134 int 1135 ucomsubmatch(struct device *parent, struct cfdata *cf, 1136 const int *ldesc, void *aux) 1137 { 1138 struct ucom_attach_args *uca = aux; 1139 1140 if (uca->portno != UCOM_UNK_PORTNO && 1141 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1142 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1143 return (0); 1144 return (config_match(parent, cf, aux)); 1145 } 1146