1 /* $NetBSD: ucom.c,v 1.77 2008/05/24 16:40:58 cube 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 1.77 2008/05/24 16:40:58 cube 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 = device_private(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_dev = self; 180 sc->sc_udev = uca->device; 181 sc->sc_iface = uca->iface; 182 sc->sc_bulkout_no = uca->bulkout; 183 sc->sc_bulkin_no = uca->bulkin; 184 sc->sc_ibufsize = uca->ibufsize; 185 sc->sc_ibufsizepad = uca->ibufsizepad; 186 sc->sc_obufsize = uca->obufsize; 187 sc->sc_opkthdrlen = uca->opkthdrlen; 188 sc->sc_methods = uca->methods; 189 sc->sc_parent = uca->arg; 190 sc->sc_portno = uca->portno; 191 192 tp = ttymalloc(); 193 tp->t_oproc = ucomstart; 194 tp->t_param = ucomparam; 195 sc->sc_tty = tp; 196 197 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 198 tty_attach(tp); 199 200 #if defined(__NetBSD__) && NRND > 0 201 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 202 RND_TYPE_TTY, 0); 203 #endif 204 205 if (!pmf_device_register(self, NULL, NULL)) 206 aprint_error_dev(self, "couldn't establish power handler\n"); 207 USB_ATTACH_SUCCESS_RETURN; 208 } 209 210 USB_DETACH(ucom) 211 { 212 struct ucom_softc *sc = device_private(self); 213 struct tty *tp = sc->sc_tty; 214 int maj, mn; 215 int s; 216 217 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 218 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 219 220 sc->sc_dying = 1; 221 pmf_device_deregister(self); 222 223 if (sc->sc_bulkin_pipe != NULL) 224 usbd_abort_pipe(sc->sc_bulkin_pipe); 225 if (sc->sc_bulkout_pipe != NULL) 226 usbd_abort_pipe(sc->sc_bulkout_pipe); 227 228 s = splusb(); 229 if (--sc->sc_refcnt >= 0) { 230 /* Wake up anyone waiting */ 231 if (tp != NULL) { 232 mutex_spin_enter(&tty_lock); 233 CLR(tp->t_state, TS_CARR_ON); 234 CLR(tp->t_cflag, CLOCAL | MDMBUF); 235 ttyflush(tp, FREAD|FWRITE); 236 mutex_spin_exit(&tty_lock); 237 } 238 /* Wait for processes to go away. */ 239 usb_detach_wait(USBDEV(sc->sc_dev)); 240 } 241 splx(s); 242 243 /* locate the major number */ 244 maj = cdevsw_lookup_major(&ucom_cdevsw); 245 246 /* Nuke the vnodes for any open instances. */ 247 mn = device_unit(self); 248 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 249 vdevgone(maj, mn, mn, VCHR); 250 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 251 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 252 253 /* Detach and free the tty. */ 254 if (tp != NULL) { 255 tty_detach(tp); 256 ttyfree(tp); 257 sc->sc_tty = NULL; 258 } 259 260 /* Detach the random source */ 261 #if defined(__NetBSD__) && NRND > 0 262 rnd_detach_source(&sc->sc_rndsource); 263 #endif 264 265 return (0); 266 } 267 268 int 269 ucom_activate(device_ptr_t self, enum devact act) 270 { 271 struct ucom_softc *sc = device_private(self); 272 273 DPRINTFN(5,("ucom_activate: %d\n", act)); 274 275 switch (act) { 276 case DVACT_ACTIVATE: 277 return (EOPNOTSUPP); 278 279 case DVACT_DEACTIVATE: 280 sc->sc_dying = 1; 281 break; 282 } 283 return (0); 284 } 285 286 void 287 ucom_shutdown(struct ucom_softc *sc) 288 { 289 struct tty *tp = sc->sc_tty; 290 291 DPRINTF(("ucom_shutdown\n")); 292 /* 293 * Hang up if necessary. Wait a bit, so the other side has time to 294 * notice even if we immediately open the port again. 295 */ 296 if (ISSET(tp->t_cflag, HUPCL)) { 297 ucom_dtr(sc, 0); 298 (void)tsleep(sc, TTIPRI, ttclos, hz); 299 } 300 } 301 302 int 303 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 304 { 305 int unit = UCOMUNIT(dev); 306 usbd_status err; 307 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 308 struct tty *tp; 309 int s; 310 int error; 311 312 if (sc == NULL) 313 return (ENXIO); 314 315 if (sc->sc_dying) 316 return (EIO); 317 318 if (!device_is_active(sc->sc_dev)) 319 return (ENXIO); 320 321 tp = sc->sc_tty; 322 323 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 324 325 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 326 return (EBUSY); 327 328 s = spltty(); 329 330 /* 331 * Do the following iff this is a first open. 332 */ 333 while (sc->sc_opening) 334 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 335 336 if (sc->sc_dying) { 337 splx(s); 338 return (EIO); 339 } 340 sc->sc_opening = 1; 341 342 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 343 struct termios t; 344 345 tp->t_dev = dev; 346 347 if (sc->sc_methods->ucom_open != NULL) { 348 error = sc->sc_methods->ucom_open(sc->sc_parent, 349 sc->sc_portno); 350 if (error) { 351 ucom_cleanup(sc); 352 sc->sc_opening = 0; 353 wakeup(&sc->sc_opening); 354 splx(s); 355 return (error); 356 } 357 } 358 359 ucom_status_change(sc); 360 361 /* 362 * Initialize the termios status to the defaults. Add in the 363 * sticky bits from TIOCSFLAGS. 364 */ 365 t.c_ispeed = 0; 366 t.c_ospeed = TTYDEF_SPEED; 367 t.c_cflag = TTYDEF_CFLAG; 368 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 369 SET(t.c_cflag, CLOCAL); 370 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 371 SET(t.c_cflag, CRTSCTS); 372 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 373 SET(t.c_cflag, MDMBUF); 374 /* Make sure ucomparam() will do something. */ 375 tp->t_ospeed = 0; 376 (void) ucomparam(tp, &t); 377 tp->t_iflag = TTYDEF_IFLAG; 378 tp->t_oflag = TTYDEF_OFLAG; 379 tp->t_lflag = TTYDEF_LFLAG; 380 ttychars(tp); 381 ttsetwater(tp); 382 383 /* 384 * Turn on DTR. We must always do this, even if carrier is not 385 * present, because otherwise we'd have to use TIOCSDTR 386 * immediately after setting CLOCAL, which applications do not 387 * expect. We always assert DTR while the device is open 388 * unless explicitly requested to deassert it. Ditto RTS. 389 */ 390 ucom_dtr(sc, 1); 391 ucom_rts(sc, 1); 392 393 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 394 ucom_hwiflow(sc); 395 396 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 397 sc->sc_bulkin_no, sc->sc_bulkout_no)); 398 399 /* Open the bulk pipes */ 400 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 401 &sc->sc_bulkin_pipe); 402 if (err) { 403 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 404 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 405 usbd_errstr(err))); 406 error = EIO; 407 goto fail_0; 408 } 409 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 410 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 411 if (err) { 412 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 413 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 414 usbd_errstr(err))); 415 error = EIO; 416 goto fail_1; 417 } 418 419 /* Allocate a request and an input buffer and start reading. */ 420 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 421 if (sc->sc_ixfer == NULL) { 422 error = ENOMEM; 423 goto fail_2; 424 } 425 426 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 427 sc->sc_ibufsizepad); 428 if (sc->sc_ibuf == NULL) { 429 error = ENOMEM; 430 goto fail_3; 431 } 432 433 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 434 if (sc->sc_oxfer == NULL) { 435 error = ENOMEM; 436 goto fail_3; 437 } 438 439 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 440 sc->sc_obufsize + 441 sc->sc_opkthdrlen); 442 if (sc->sc_obuf == NULL) { 443 error = ENOMEM; 444 goto fail_4; 445 } 446 447 ucomstartread(sc); 448 } 449 sc->sc_opening = 0; 450 wakeup(&sc->sc_opening); 451 splx(s); 452 453 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 454 if (error) 455 goto bad; 456 457 error = (*tp->t_linesw->l_open)(dev, tp); 458 if (error) 459 goto bad; 460 461 return (0); 462 463 fail_4: 464 usbd_free_xfer(sc->sc_oxfer); 465 sc->sc_oxfer = NULL; 466 fail_3: 467 usbd_free_xfer(sc->sc_ixfer); 468 sc->sc_ixfer = NULL; 469 fail_2: 470 usbd_close_pipe(sc->sc_bulkout_pipe); 471 sc->sc_bulkout_pipe = NULL; 472 fail_1: 473 usbd_close_pipe(sc->sc_bulkin_pipe); 474 sc->sc_bulkin_pipe = NULL; 475 fail_0: 476 sc->sc_opening = 0; 477 wakeup(&sc->sc_opening); 478 splx(s); 479 return (error); 480 481 bad: 482 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 483 /* 484 * We failed to open the device, and nobody else had it opened. 485 * Clean up the state as appropriate. 486 */ 487 ucom_cleanup(sc); 488 } 489 490 return (error); 491 } 492 493 int 494 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 495 { 496 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 497 struct tty *tp = sc->sc_tty; 498 499 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 500 if (!ISSET(tp->t_state, TS_ISOPEN)) 501 return (0); 502 503 sc->sc_refcnt++; 504 505 (*tp->t_linesw->l_close)(tp, flag); 506 ttyclose(tp); 507 508 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 509 /* 510 * Although we got a last close, the device may still be in 511 * use; e.g. if this was the dialout node, and there are still 512 * processes waiting for carrier on the non-dialout node. 513 */ 514 ucom_cleanup(sc); 515 } 516 517 if (sc->sc_methods->ucom_close != NULL) 518 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 519 520 if (--sc->sc_refcnt < 0) 521 usb_detach_wakeup(USBDEV(sc->sc_dev)); 522 523 return (0); 524 } 525 526 int 527 ucomread(dev_t dev, struct uio *uio, int flag) 528 { 529 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 530 struct tty *tp = sc->sc_tty; 531 int error; 532 533 if (sc->sc_dying) 534 return (EIO); 535 536 sc->sc_refcnt++; 537 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 538 if (--sc->sc_refcnt < 0) 539 usb_detach_wakeup(USBDEV(sc->sc_dev)); 540 return (error); 541 } 542 543 int 544 ucomwrite(dev_t dev, struct uio *uio, int flag) 545 { 546 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 547 struct tty *tp = sc->sc_tty; 548 int error; 549 550 if (sc->sc_dying) 551 return (EIO); 552 553 sc->sc_refcnt++; 554 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 555 if (--sc->sc_refcnt < 0) 556 usb_detach_wakeup(USBDEV(sc->sc_dev)); 557 return (error); 558 } 559 560 int 561 ucompoll(dev_t dev, int events, struct lwp *l) 562 { 563 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 564 struct tty *tp = sc->sc_tty; 565 int revents; 566 567 if (sc->sc_dying) 568 return (POLLHUP); 569 570 sc->sc_refcnt++; 571 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 572 if (--sc->sc_refcnt < 0) 573 usb_detach_wakeup(USBDEV(sc->sc_dev)); 574 return (revents); 575 } 576 577 struct tty * 578 ucomtty(dev_t dev) 579 { 580 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 581 struct tty *tp = sc->sc_tty; 582 583 return (tp); 584 } 585 586 int 587 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 588 { 589 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 590 int error; 591 592 sc->sc_refcnt++; 593 error = ucom_do_ioctl(sc, cmd, data, flag, l); 594 if (--sc->sc_refcnt < 0) 595 usb_detach_wakeup(USBDEV(sc->sc_dev)); 596 return (error); 597 } 598 599 Static int 600 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 601 int flag, struct lwp *l) 602 { 603 struct tty *tp = sc->sc_tty; 604 int error; 605 int s; 606 607 if (sc->sc_dying) 608 return (EIO); 609 610 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 611 612 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 613 if (error != EPASSTHROUGH) 614 return (error); 615 616 error = ttioctl(tp, cmd, data, flag, l); 617 if (error != EPASSTHROUGH) 618 return (error); 619 620 if (sc->sc_methods->ucom_ioctl != NULL) { 621 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 622 sc->sc_portno, cmd, data, flag, l->l_proc); 623 if (error != EPASSTHROUGH) 624 return (error); 625 } 626 627 error = 0; 628 629 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 630 s = spltty(); 631 632 switch (cmd) { 633 case TIOCSBRK: 634 ucom_break(sc, 1); 635 break; 636 637 case TIOCCBRK: 638 ucom_break(sc, 0); 639 break; 640 641 case TIOCSDTR: 642 ucom_dtr(sc, 1); 643 break; 644 645 case TIOCCDTR: 646 ucom_dtr(sc, 0); 647 break; 648 649 case TIOCGFLAGS: 650 *(int *)data = sc->sc_swflags; 651 break; 652 653 case TIOCSFLAGS: 654 error = kauth_authorize_device_tty(l->l_cred, 655 KAUTH_DEVICE_TTY_PRIVSET, tp); 656 if (error) 657 break; 658 sc->sc_swflags = *(int *)data; 659 break; 660 661 case TIOCMSET: 662 case TIOCMBIS: 663 case TIOCMBIC: 664 tiocm_to_ucom(sc, cmd, *(int *)data); 665 break; 666 667 case TIOCMGET: 668 *(int *)data = ucom_to_tiocm(sc); 669 break; 670 671 default: 672 error = EPASSTHROUGH; 673 break; 674 } 675 676 splx(s); 677 678 return (error); 679 } 680 681 Static void 682 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 683 { 684 u_char combits; 685 686 combits = 0; 687 if (ISSET(ttybits, TIOCM_DTR)) 688 SET(combits, UMCR_DTR); 689 if (ISSET(ttybits, TIOCM_RTS)) 690 SET(combits, UMCR_RTS); 691 692 switch (how) { 693 case TIOCMBIC: 694 CLR(sc->sc_mcr, combits); 695 break; 696 697 case TIOCMBIS: 698 SET(sc->sc_mcr, combits); 699 break; 700 701 case TIOCMSET: 702 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 703 SET(sc->sc_mcr, combits); 704 break; 705 } 706 707 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 708 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 709 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 710 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 711 } 712 713 Static int 714 ucom_to_tiocm(struct ucom_softc *sc) 715 { 716 u_char combits; 717 int ttybits = 0; 718 719 combits = sc->sc_mcr; 720 if (ISSET(combits, UMCR_DTR)) 721 SET(ttybits, TIOCM_DTR); 722 if (ISSET(combits, UMCR_RTS)) 723 SET(ttybits, TIOCM_RTS); 724 725 combits = sc->sc_msr; 726 if (ISSET(combits, UMSR_DCD)) 727 SET(ttybits, TIOCM_CD); 728 if (ISSET(combits, UMSR_CTS)) 729 SET(ttybits, TIOCM_CTS); 730 if (ISSET(combits, UMSR_DSR)) 731 SET(ttybits, TIOCM_DSR); 732 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 733 SET(ttybits, TIOCM_RI); 734 735 #if 0 736 XXX; 737 if (sc->sc_ier != 0) 738 SET(ttybits, TIOCM_LE); 739 #endif 740 741 return (ttybits); 742 } 743 744 Static void 745 ucom_break(struct ucom_softc *sc, int onoff) 746 { 747 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 748 749 if (sc->sc_methods->ucom_set != NULL) 750 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 751 UCOM_SET_BREAK, onoff); 752 } 753 754 Static void 755 ucom_dtr(struct ucom_softc *sc, int onoff) 756 { 757 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 758 759 if (sc->sc_methods->ucom_set != NULL) 760 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 761 UCOM_SET_DTR, onoff); 762 } 763 764 Static void 765 ucom_rts(struct ucom_softc *sc, int onoff) 766 { 767 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 768 769 if (sc->sc_methods->ucom_set != NULL) 770 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 771 UCOM_SET_RTS, onoff); 772 } 773 774 void 775 ucom_status_change(struct ucom_softc *sc) 776 { 777 struct tty *tp = sc->sc_tty; 778 u_char old_msr; 779 780 if (sc->sc_methods->ucom_get_status != NULL) { 781 old_msr = sc->sc_msr; 782 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 783 &sc->sc_lsr, &sc->sc_msr); 784 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 785 (*tp->t_linesw->l_modem)(tp, 786 ISSET(sc->sc_msr, UMSR_DCD)); 787 } else { 788 sc->sc_lsr = 0; 789 /* Assume DCD is present, if we have no chance to check it. */ 790 sc->sc_msr = UMSR_DCD; 791 } 792 } 793 794 Static int 795 ucomparam(struct tty *tp, struct termios *t) 796 { 797 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 798 UCOMUNIT(tp->t_dev)); 799 int error; 800 801 if (sc->sc_dying) 802 return (EIO); 803 804 /* Check requested parameters. */ 805 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 806 return (EINVAL); 807 808 /* 809 * For the console, always force CLOCAL and !HUPCL, so that the port 810 * is always active. 811 */ 812 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 813 SET(t->c_cflag, CLOCAL); 814 CLR(t->c_cflag, HUPCL); 815 } 816 817 /* 818 * If there were no changes, don't do anything. This avoids dropping 819 * input and improves performance when all we did was frob things like 820 * VMIN and VTIME. 821 */ 822 if (tp->t_ospeed == t->c_ospeed && 823 tp->t_cflag == t->c_cflag) 824 return (0); 825 826 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 827 828 /* And copy to tty. */ 829 tp->t_ispeed = 0; 830 tp->t_ospeed = t->c_ospeed; 831 tp->t_cflag = t->c_cflag; 832 833 if (sc->sc_methods->ucom_param != NULL) { 834 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 835 t); 836 if (error) 837 return (error); 838 } 839 840 /* XXX worry about CHWFLOW */ 841 842 /* 843 * Update the tty layer's idea of the carrier bit, in case we changed 844 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 845 * explicit request. 846 */ 847 DPRINTF(("ucomparam: l_modem\n")); 848 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 849 850 #if 0 851 XXX what if the hardware is not open 852 if (!ISSET(t->c_cflag, CHWFLOW)) { 853 if (sc->sc_tx_stopped) { 854 sc->sc_tx_stopped = 0; 855 ucomstart(tp); 856 } 857 } 858 #endif 859 860 return (0); 861 } 862 863 /* 864 * (un)block input via hw flowcontrol 865 */ 866 Static void 867 ucom_hwiflow(struct ucom_softc *sc) 868 { 869 DPRINTF(("ucom_hwiflow:\n")); 870 #if 0 871 XXX 872 bus_space_tag_t iot = sc->sc_iot; 873 bus_space_handle_t ioh = sc->sc_ioh; 874 875 if (sc->sc_mcr_rts == 0) 876 return; 877 878 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 879 CLR(sc->sc_mcr, sc->sc_mcr_rts); 880 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 881 } else { 882 SET(sc->sc_mcr, sc->sc_mcr_rts); 883 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 884 } 885 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 886 #endif 887 } 888 889 Static void 890 ucomstart(struct tty *tp) 891 { 892 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 893 UCOMUNIT(tp->t_dev)); 894 usbd_status err; 895 int s; 896 u_char *data; 897 int cnt; 898 899 if (sc->sc_dying) 900 return; 901 902 s = spltty(); 903 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 904 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 905 goto out; 906 } 907 if (sc->sc_tx_stopped) 908 goto out; 909 910 if (!ttypull(tp)) 911 goto out; 912 913 /* Grab the first contiguous region of buffer space. */ 914 data = tp->t_outq.c_cf; 915 cnt = ndqb(&tp->t_outq, 0); 916 917 if (cnt == 0) { 918 DPRINTF(("ucomstart: cnt==0\n")); 919 goto out; 920 } 921 922 SET(tp->t_state, TS_BUSY); 923 924 if (cnt > sc->sc_obufsize) { 925 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 926 cnt = sc->sc_obufsize; 927 } 928 if (sc->sc_methods->ucom_write != NULL) 929 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 930 sc->sc_obuf, data, &cnt); 931 else 932 memcpy(sc->sc_obuf, data, cnt); 933 934 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 935 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 936 (usbd_private_handle)sc, sc->sc_obuf, cnt, 937 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 938 /* What can we do on error? */ 939 err = usbd_transfer(sc->sc_oxfer); 940 #ifdef DIAGNOSTIC 941 if (err != USBD_IN_PROGRESS) 942 printf("ucomstart: err=%s\n", usbd_errstr(err)); 943 #endif 944 945 out: 946 splx(s); 947 } 948 949 void 950 ucomstop(struct tty *tp, int flag) 951 { 952 DPRINTF(("ucomstop: flag=%d\n", flag)); 953 #if 0 954 /*struct ucom_softc *sc = 955 device_lookup_private(&ucom_cd, UCOMUNIT(dev));*/ 956 int s; 957 958 s = spltty(); 959 if (ISSET(tp->t_state, TS_BUSY)) { 960 DPRINTF(("ucomstop: XXX\n")); 961 /* sc->sc_tx_stopped = 1; */ 962 if (!ISSET(tp->t_state, TS_TTSTOP)) 963 SET(tp->t_state, TS_FLUSH); 964 } 965 splx(s); 966 #endif 967 } 968 969 Static void 970 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 971 { 972 struct ucom_softc *sc = (struct ucom_softc *)p; 973 struct tty *tp = sc->sc_tty; 974 u_int32_t cc; 975 int s; 976 977 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 978 979 if (status == USBD_CANCELLED || sc->sc_dying) 980 goto error; 981 982 if (status) { 983 DPRINTF(("ucomwritecb: status=%d\n", status)); 984 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 985 /* XXX we should restart after some delay. */ 986 goto error; 987 } 988 989 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 990 #if defined(__NetBSD__) && NRND > 0 991 rnd_add_uint32(&sc->sc_rndsource, cc); 992 #endif 993 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 994 /* convert from USB bytes to tty bytes */ 995 cc -= sc->sc_opkthdrlen; 996 997 s = spltty(); 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 (*tp->t_linesw->l_start)(tp); 1004 splx(s); 1005 return; 1006 1007 error: 1008 s = spltty(); 1009 CLR(tp->t_state, TS_BUSY); 1010 splx(s); 1011 } 1012 1013 Static usbd_status 1014 ucomstartread(struct ucom_softc *sc) 1015 { 1016 usbd_status err; 1017 1018 DPRINTFN(5,("ucomstartread: start\n")); 1019 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1020 (usbd_private_handle)sc, 1021 sc->sc_ibuf, sc->sc_ibufsize, 1022 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1023 USBD_NO_TIMEOUT, ucomreadcb); 1024 err = usbd_transfer(sc->sc_ixfer); 1025 if (err != USBD_IN_PROGRESS) { 1026 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1027 return (err); 1028 } 1029 return (USBD_NORMAL_COMPLETION); 1030 } 1031 1032 Static void 1033 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1034 { 1035 struct ucom_softc *sc = (struct ucom_softc *)p; 1036 struct tty *tp = sc->sc_tty; 1037 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1038 usbd_status err; 1039 u_int32_t cc; 1040 u_char *cp; 1041 int s; 1042 1043 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1044 1045 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1046 sc->sc_dying) { 1047 DPRINTF(("ucomreadcb: dying\n")); 1048 /* Send something to wake upper layer */ 1049 s = spltty(); 1050 (*rint)('\n', tp); 1051 mutex_spin_enter(&tty_lock); /* XXX */ 1052 ttwakeup(tp); 1053 mutex_spin_exit(&tty_lock); /* XXX */ 1054 splx(s); 1055 return; 1056 } 1057 1058 if (status) { 1059 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1060 /* XXX we should restart after some delay. */ 1061 return; 1062 } 1063 1064 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1065 #if defined(__NetBSD__) && NRND > 0 1066 rnd_add_uint32(&sc->sc_rndsource, cc); 1067 #endif 1068 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1069 if (sc->sc_methods->ucom_read != NULL) 1070 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1071 &cp, &cc); 1072 1073 s = spltty(); 1074 /* Give characters to tty layer. */ 1075 while (cc-- > 0) { 1076 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1077 if ((*rint)(*cp++, tp) == -1) { 1078 /* XXX what should we do? */ 1079 aprint_error_dev(sc->sc_dev, "lost %d chars\n", 1080 cc); 1081 break; 1082 } 1083 } 1084 splx(s); 1085 1086 err = ucomstartread(sc); 1087 if (err) { 1088 aprint_error_dev(sc->sc_dev, "read start failed\n"); 1089 /* XXX what should we dow now? */ 1090 } 1091 } 1092 1093 Static void 1094 ucom_cleanup(struct ucom_softc *sc) 1095 { 1096 DPRINTF(("ucom_cleanup: closing pipes\n")); 1097 1098 ucom_shutdown(sc); 1099 if (sc->sc_bulkin_pipe != NULL) { 1100 usbd_abort_pipe(sc->sc_bulkin_pipe); 1101 usbd_close_pipe(sc->sc_bulkin_pipe); 1102 sc->sc_bulkin_pipe = NULL; 1103 } 1104 if (sc->sc_bulkout_pipe != NULL) { 1105 usbd_abort_pipe(sc->sc_bulkout_pipe); 1106 usbd_close_pipe(sc->sc_bulkout_pipe); 1107 sc->sc_bulkout_pipe = NULL; 1108 } 1109 if (sc->sc_ixfer != NULL) { 1110 usbd_free_xfer(sc->sc_ixfer); 1111 sc->sc_ixfer = NULL; 1112 } 1113 if (sc->sc_oxfer != NULL) { 1114 usbd_free_xfer(sc->sc_oxfer); 1115 sc->sc_oxfer = NULL; 1116 } 1117 } 1118 1119 #endif /* NUCOM > 0 */ 1120 1121 int 1122 ucomprint(void *aux, const char *pnp) 1123 { 1124 struct ucom_attach_args *uca = aux; 1125 1126 if (pnp) 1127 aprint_normal("ucom at %s", pnp); 1128 if (uca->portno != UCOM_UNK_PORTNO) 1129 aprint_normal(" portno %d", uca->portno); 1130 return (UNCONF); 1131 } 1132 1133 int 1134 ucomsubmatch(device_t parent, cfdata_t cf, 1135 const int *ldesc, void *aux) 1136 { 1137 struct ucom_attach_args *uca = aux; 1138 1139 if (uca->portno != UCOM_UNK_PORTNO && 1140 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1141 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1142 return (0); 1143 return (config_match(parent, cf, aux)); 1144 } 1145