1 /* $NetBSD: ucom.c,v 1.68 2006/10/12 01:31:59 christos 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 1.68 2006/10/12 01:31:59 christos 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 __unused, 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 (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 330 return (EBUSY); 331 332 s = spltty(); 333 334 /* 335 * Do the following iff this is a first open. 336 */ 337 while (sc->sc_opening) 338 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 339 340 if (sc->sc_dying) { 341 splx(s); 342 return (EIO); 343 } 344 sc->sc_opening = 1; 345 346 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 347 struct termios t; 348 349 tp->t_dev = dev; 350 351 if (sc->sc_methods->ucom_open != NULL) { 352 error = sc->sc_methods->ucom_open(sc->sc_parent, 353 sc->sc_portno); 354 if (error) { 355 ucom_cleanup(sc); 356 sc->sc_opening = 0; 357 wakeup(&sc->sc_opening); 358 splx(s); 359 return (error); 360 } 361 } 362 363 ucom_status_change(sc); 364 365 /* 366 * Initialize the termios status to the defaults. Add in the 367 * sticky bits from TIOCSFLAGS. 368 */ 369 t.c_ispeed = 0; 370 t.c_ospeed = TTYDEF_SPEED; 371 t.c_cflag = TTYDEF_CFLAG; 372 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 373 SET(t.c_cflag, CLOCAL); 374 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 375 SET(t.c_cflag, CRTSCTS); 376 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 377 SET(t.c_cflag, MDMBUF); 378 /* Make sure ucomparam() will do something. */ 379 tp->t_ospeed = 0; 380 (void) ucomparam(tp, &t); 381 tp->t_iflag = TTYDEF_IFLAG; 382 tp->t_oflag = TTYDEF_OFLAG; 383 tp->t_lflag = TTYDEF_LFLAG; 384 ttychars(tp); 385 ttsetwater(tp); 386 387 /* 388 * Turn on DTR. We must always do this, even if carrier is not 389 * present, because otherwise we'd have to use TIOCSDTR 390 * immediately after setting CLOCAL, which applications do not 391 * expect. We always assert DTR while the device is open 392 * unless explicitly requested to deassert it. Ditto RTS. 393 */ 394 ucom_dtr(sc, 1); 395 ucom_rts(sc, 1); 396 397 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 398 ucom_hwiflow(sc); 399 400 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 401 sc->sc_bulkin_no, sc->sc_bulkout_no)); 402 403 /* Open the bulk pipes */ 404 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 405 &sc->sc_bulkin_pipe); 406 if (err) { 407 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 408 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 409 usbd_errstr(err))); 410 error = EIO; 411 goto fail_0; 412 } 413 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 414 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 415 if (err) { 416 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 417 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 418 usbd_errstr(err))); 419 error = EIO; 420 goto fail_1; 421 } 422 423 /* Allocate a request and an input buffer and start reading. */ 424 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 425 if (sc->sc_ixfer == NULL) { 426 error = ENOMEM; 427 goto fail_2; 428 } 429 430 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 431 sc->sc_ibufsizepad); 432 if (sc->sc_ibuf == NULL) { 433 error = ENOMEM; 434 goto fail_3; 435 } 436 437 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 438 if (sc->sc_oxfer == NULL) { 439 error = ENOMEM; 440 goto fail_3; 441 } 442 443 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 444 sc->sc_obufsize + 445 sc->sc_opkthdrlen); 446 if (sc->sc_obuf == NULL) { 447 error = ENOMEM; 448 goto fail_4; 449 } 450 451 ucomstartread(sc); 452 } 453 sc->sc_opening = 0; 454 wakeup(&sc->sc_opening); 455 splx(s); 456 457 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 458 if (error) 459 goto bad; 460 461 error = (*tp->t_linesw->l_open)(dev, tp); 462 if (error) 463 goto bad; 464 465 return (0); 466 467 fail_4: 468 usbd_free_xfer(sc->sc_oxfer); 469 sc->sc_oxfer = NULL; 470 fail_3: 471 usbd_free_xfer(sc->sc_ixfer); 472 sc->sc_ixfer = NULL; 473 fail_2: 474 usbd_close_pipe(sc->sc_bulkout_pipe); 475 sc->sc_bulkout_pipe = NULL; 476 fail_1: 477 usbd_close_pipe(sc->sc_bulkin_pipe); 478 sc->sc_bulkin_pipe = NULL; 479 fail_0: 480 sc->sc_opening = 0; 481 wakeup(&sc->sc_opening); 482 splx(s); 483 return (error); 484 485 bad: 486 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 487 /* 488 * We failed to open the device, and nobody else had it opened. 489 * Clean up the state as appropriate. 490 */ 491 ucom_cleanup(sc); 492 } 493 494 return (error); 495 } 496 497 int 498 ucomclose(dev_t dev, int flag, int mode __unused, struct lwp *l __unused) 499 { 500 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 501 struct tty *tp = sc->sc_tty; 502 503 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 504 if (!ISSET(tp->t_state, TS_ISOPEN)) 505 return (0); 506 507 sc->sc_refcnt++; 508 509 (*tp->t_linesw->l_close)(tp, flag); 510 ttyclose(tp); 511 512 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 513 /* 514 * Although we got a last close, the device may still be in 515 * use; e.g. if this was the dialout node, and there are still 516 * processes waiting for carrier on the non-dialout node. 517 */ 518 ucom_cleanup(sc); 519 } 520 521 if (sc->sc_methods->ucom_close != NULL) 522 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 523 524 if (--sc->sc_refcnt < 0) 525 usb_detach_wakeup(USBDEV(sc->sc_dev)); 526 527 return (0); 528 } 529 530 int 531 ucomread(dev_t dev, struct uio *uio, int flag) 532 { 533 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 534 struct tty *tp = sc->sc_tty; 535 int error; 536 537 if (sc->sc_dying) 538 return (EIO); 539 540 sc->sc_refcnt++; 541 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 542 if (--sc->sc_refcnt < 0) 543 usb_detach_wakeup(USBDEV(sc->sc_dev)); 544 return (error); 545 } 546 547 int 548 ucomwrite(dev_t dev, struct uio *uio, int flag) 549 { 550 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 551 struct tty *tp = sc->sc_tty; 552 int error; 553 554 if (sc->sc_dying) 555 return (EIO); 556 557 sc->sc_refcnt++; 558 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 559 if (--sc->sc_refcnt < 0) 560 usb_detach_wakeup(USBDEV(sc->sc_dev)); 561 return (error); 562 } 563 564 int 565 ucompoll(dev_t dev, int events, struct lwp *l) 566 { 567 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 568 struct tty *tp = sc->sc_tty; 569 int revents; 570 571 if (sc->sc_dying) 572 return (POLLHUP); 573 574 sc->sc_refcnt++; 575 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 576 if (--sc->sc_refcnt < 0) 577 usb_detach_wakeup(USBDEV(sc->sc_dev)); 578 return (revents); 579 } 580 581 struct tty * 582 ucomtty(dev_t dev) 583 { 584 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 585 struct tty *tp = sc->sc_tty; 586 587 return (tp); 588 } 589 590 int 591 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 592 { 593 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 594 int error; 595 596 sc->sc_refcnt++; 597 error = ucom_do_ioctl(sc, cmd, data, flag, l); 598 if (--sc->sc_refcnt < 0) 599 usb_detach_wakeup(USBDEV(sc->sc_dev)); 600 return (error); 601 } 602 603 Static int 604 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 605 int flag, struct lwp *l) 606 { 607 struct tty *tp = sc->sc_tty; 608 int error; 609 int s; 610 611 if (sc->sc_dying) 612 return (EIO); 613 614 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 615 616 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 617 if (error != EPASSTHROUGH) 618 return (error); 619 620 error = ttioctl(tp, cmd, data, flag, l); 621 if (error != EPASSTHROUGH) 622 return (error); 623 624 if (sc->sc_methods->ucom_ioctl != NULL) { 625 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 626 sc->sc_portno, cmd, data, flag, l->l_proc); 627 if (error != EPASSTHROUGH) 628 return (error); 629 } 630 631 error = 0; 632 633 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 634 s = spltty(); 635 636 switch (cmd) { 637 case TIOCSBRK: 638 ucom_break(sc, 1); 639 break; 640 641 case TIOCCBRK: 642 ucom_break(sc, 0); 643 break; 644 645 case TIOCSDTR: 646 ucom_dtr(sc, 1); 647 break; 648 649 case TIOCCDTR: 650 ucom_dtr(sc, 0); 651 break; 652 653 case TIOCGFLAGS: 654 *(int *)data = sc->sc_swflags; 655 break; 656 657 case TIOCSFLAGS: 658 error = kauth_authorize_device_tty(l->l_cred, 659 KAUTH_DEVICE_TTY_PRIVSET, tp); 660 if (error) 661 break; 662 sc->sc_swflags = *(int *)data; 663 break; 664 665 case TIOCMSET: 666 case TIOCMBIS: 667 case TIOCMBIC: 668 tiocm_to_ucom(sc, cmd, *(int *)data); 669 break; 670 671 case TIOCMGET: 672 *(int *)data = ucom_to_tiocm(sc); 673 break; 674 675 default: 676 error = EPASSTHROUGH; 677 break; 678 } 679 680 splx(s); 681 682 return (error); 683 } 684 685 Static void 686 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 687 { 688 u_char combits; 689 690 combits = 0; 691 if (ISSET(ttybits, TIOCM_DTR)) 692 SET(combits, UMCR_DTR); 693 if (ISSET(ttybits, TIOCM_RTS)) 694 SET(combits, UMCR_RTS); 695 696 switch (how) { 697 case TIOCMBIC: 698 CLR(sc->sc_mcr, combits); 699 break; 700 701 case TIOCMBIS: 702 SET(sc->sc_mcr, combits); 703 break; 704 705 case TIOCMSET: 706 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 707 SET(sc->sc_mcr, combits); 708 break; 709 } 710 711 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 712 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 713 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 714 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 715 } 716 717 Static int 718 ucom_to_tiocm(struct ucom_softc *sc) 719 { 720 u_char combits; 721 int ttybits = 0; 722 723 combits = sc->sc_mcr; 724 if (ISSET(combits, UMCR_DTR)) 725 SET(ttybits, TIOCM_DTR); 726 if (ISSET(combits, UMCR_RTS)) 727 SET(ttybits, TIOCM_RTS); 728 729 combits = sc->sc_msr; 730 if (ISSET(combits, UMSR_DCD)) 731 SET(ttybits, TIOCM_CD); 732 if (ISSET(combits, UMSR_CTS)) 733 SET(ttybits, TIOCM_CTS); 734 if (ISSET(combits, UMSR_DSR)) 735 SET(ttybits, TIOCM_DSR); 736 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 737 SET(ttybits, TIOCM_RI); 738 739 #if 0 740 XXX; 741 if (sc->sc_ier != 0) 742 SET(ttybits, TIOCM_LE); 743 #endif 744 745 return (ttybits); 746 } 747 748 Static void 749 ucom_break(sc, onoff) 750 struct ucom_softc *sc; 751 int onoff; 752 { 753 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 754 755 if (sc->sc_methods->ucom_set != NULL) 756 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 757 UCOM_SET_BREAK, onoff); 758 } 759 760 Static void 761 ucom_dtr(struct ucom_softc *sc, int onoff) 762 { 763 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 764 765 if (sc->sc_methods->ucom_set != NULL) 766 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 767 UCOM_SET_DTR, onoff); 768 } 769 770 Static void 771 ucom_rts(struct ucom_softc *sc, int onoff) 772 { 773 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 774 775 if (sc->sc_methods->ucom_set != NULL) 776 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 777 UCOM_SET_RTS, onoff); 778 } 779 780 void 781 ucom_status_change(struct ucom_softc *sc) 782 { 783 struct tty *tp = sc->sc_tty; 784 u_char old_msr; 785 786 if (sc->sc_methods->ucom_get_status != NULL) { 787 old_msr = sc->sc_msr; 788 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 789 &sc->sc_lsr, &sc->sc_msr); 790 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 791 (*tp->t_linesw->l_modem)(tp, 792 ISSET(sc->sc_msr, UMSR_DCD)); 793 } else { 794 sc->sc_lsr = 0; 795 /* Assume DCD is present, if we have no chance to check it. */ 796 sc->sc_msr = UMSR_DCD; 797 } 798 } 799 800 Static int 801 ucomparam(struct tty *tp, struct termios *t) 802 { 803 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 804 int error; 805 806 if (sc->sc_dying) 807 return (EIO); 808 809 /* Check requested parameters. */ 810 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 811 return (EINVAL); 812 813 /* 814 * For the console, always force CLOCAL and !HUPCL, so that the port 815 * is always active. 816 */ 817 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 818 SET(t->c_cflag, CLOCAL); 819 CLR(t->c_cflag, HUPCL); 820 } 821 822 /* 823 * If there were no changes, don't do anything. This avoids dropping 824 * input and improves performance when all we did was frob things like 825 * VMIN and VTIME. 826 */ 827 if (tp->t_ospeed == t->c_ospeed && 828 tp->t_cflag == t->c_cflag) 829 return (0); 830 831 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 832 833 /* And copy to tty. */ 834 tp->t_ispeed = 0; 835 tp->t_ospeed = t->c_ospeed; 836 tp->t_cflag = t->c_cflag; 837 838 if (sc->sc_methods->ucom_param != NULL) { 839 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 840 t); 841 if (error) 842 return (error); 843 } 844 845 /* XXX worry about CHWFLOW */ 846 847 /* 848 * Update the tty layer's idea of the carrier bit, in case we changed 849 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 850 * explicit request. 851 */ 852 DPRINTF(("ucomparam: l_modem\n")); 853 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 854 855 #if 0 856 XXX what if the hardware is not open 857 if (!ISSET(t->c_cflag, CHWFLOW)) { 858 if (sc->sc_tx_stopped) { 859 sc->sc_tx_stopped = 0; 860 ucomstart(tp); 861 } 862 } 863 #endif 864 865 return (0); 866 } 867 868 /* 869 * (un)block input via hw flowcontrol 870 */ 871 Static void 872 ucom_hwiflow(struct ucom_softc *sc __unused) 873 { 874 DPRINTF(("ucom_hwiflow:\n")); 875 #if 0 876 XXX 877 bus_space_tag_t iot = sc->sc_iot; 878 bus_space_handle_t ioh = sc->sc_ioh; 879 880 if (sc->sc_mcr_rts == 0) 881 return; 882 883 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 884 CLR(sc->sc_mcr, sc->sc_mcr_rts); 885 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 886 } else { 887 SET(sc->sc_mcr, sc->sc_mcr_rts); 888 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 889 } 890 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 891 #endif 892 } 893 894 Static void 895 ucomstart(struct tty *tp) 896 { 897 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 898 usbd_status err; 899 int s; 900 u_char *data; 901 int cnt; 902 903 if (sc->sc_dying) 904 return; 905 906 s = spltty(); 907 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 908 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 909 goto out; 910 } 911 if (sc->sc_tx_stopped) 912 goto out; 913 914 if (tp->t_outq.c_cc <= tp->t_lowat) { 915 if (ISSET(tp->t_state, TS_ASLEEP)) { 916 CLR(tp->t_state, TS_ASLEEP); 917 wakeup(&tp->t_outq); 918 } 919 selwakeup(&tp->t_wsel); 920 if (tp->t_outq.c_cc == 0) 921 goto out; 922 } 923 924 /* Grab the first contiguous region of buffer space. */ 925 data = tp->t_outq.c_cf; 926 cnt = ndqb(&tp->t_outq, 0); 927 928 if (cnt == 0) { 929 DPRINTF(("ucomstart: cnt==0\n")); 930 goto out; 931 } 932 933 SET(tp->t_state, TS_BUSY); 934 935 if (cnt > sc->sc_obufsize) { 936 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 937 cnt = sc->sc_obufsize; 938 } 939 if (sc->sc_methods->ucom_write != NULL) 940 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 941 sc->sc_obuf, data, &cnt); 942 else 943 memcpy(sc->sc_obuf, data, cnt); 944 945 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 946 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 947 (usbd_private_handle)sc, sc->sc_obuf, cnt, 948 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 949 /* What can we do on error? */ 950 err = usbd_transfer(sc->sc_oxfer); 951 #ifdef DIAGNOSTIC 952 if (err != USBD_IN_PROGRESS) 953 printf("ucomstart: err=%s\n", usbd_errstr(err)); 954 #endif 955 956 out: 957 splx(s); 958 } 959 960 void 961 ucomstop(struct tty *tp __unused, int flag __unused) 962 { 963 DPRINTF(("ucomstop: flag=%d\n", flag)); 964 #if 0 965 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 966 int s; 967 968 s = spltty(); 969 if (ISSET(tp->t_state, TS_BUSY)) { 970 DPRINTF(("ucomstop: XXX\n")); 971 /* sc->sc_tx_stopped = 1; */ 972 if (!ISSET(tp->t_state, TS_TTSTOP)) 973 SET(tp->t_state, TS_FLUSH); 974 } 975 splx(s); 976 #endif 977 } 978 979 Static void 980 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 981 { 982 struct ucom_softc *sc = (struct ucom_softc *)p; 983 struct tty *tp = sc->sc_tty; 984 u_int32_t cc; 985 int s; 986 987 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 988 989 if (status == USBD_CANCELLED || sc->sc_dying) 990 goto error; 991 992 if (status) { 993 DPRINTF(("ucomwritecb: status=%d\n", status)); 994 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 995 /* XXX we should restart after some delay. */ 996 goto error; 997 } 998 999 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 1000 #if defined(__NetBSD__) && NRND > 0 1001 rnd_add_uint32(&sc->sc_rndsource, cc); 1002 #endif 1003 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 1004 /* convert from USB bytes to tty bytes */ 1005 cc -= sc->sc_opkthdrlen; 1006 1007 s = spltty(); 1008 CLR(tp->t_state, TS_BUSY); 1009 if (ISSET(tp->t_state, TS_FLUSH)) 1010 CLR(tp->t_state, TS_FLUSH); 1011 else 1012 ndflush(&tp->t_outq, cc); 1013 (*tp->t_linesw->l_start)(tp); 1014 splx(s); 1015 return; 1016 1017 error: 1018 s = spltty(); 1019 CLR(tp->t_state, TS_BUSY); 1020 splx(s); 1021 } 1022 1023 Static usbd_status 1024 ucomstartread(struct ucom_softc *sc) 1025 { 1026 usbd_status err; 1027 1028 DPRINTFN(5,("ucomstartread: start\n")); 1029 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1030 (usbd_private_handle)sc, 1031 sc->sc_ibuf, sc->sc_ibufsize, 1032 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1033 USBD_NO_TIMEOUT, ucomreadcb); 1034 err = usbd_transfer(sc->sc_ixfer); 1035 if (err != USBD_IN_PROGRESS) { 1036 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1037 return (err); 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, struct tty *) = tp->t_linesw->l_rint; 1048 usbd_status err; 1049 u_int32_t cc; 1050 u_char *cp; 1051 int s; 1052 1053 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1054 1055 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1056 sc->sc_dying) { 1057 DPRINTF(("ucomreadcb: dying\n")); 1058 /* Send something to wake upper layer */ 1059 s = spltty(); 1060 (*rint)('\n', tp); 1061 ttwakeup(tp); 1062 splx(s); 1063 return; 1064 } 1065 1066 if (status) { 1067 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1068 /* XXX we should restart after some delay. */ 1069 return; 1070 } 1071 1072 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1073 #if defined(__NetBSD__) && NRND > 0 1074 rnd_add_uint32(&sc->sc_rndsource, cc); 1075 #endif 1076 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1077 if (sc->sc_methods->ucom_read != NULL) 1078 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1079 &cp, &cc); 1080 1081 s = spltty(); 1082 /* Give characters to tty layer. */ 1083 while (cc-- > 0) { 1084 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1085 if ((*rint)(*cp++, tp) == -1) { 1086 /* XXX what should we do? */ 1087 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1088 cc); 1089 break; 1090 } 1091 } 1092 splx(s); 1093 1094 err = ucomstartread(sc); 1095 if (err) { 1096 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1097 /* XXX what should we dow now? */ 1098 } 1099 } 1100 1101 Static void 1102 ucom_cleanup(struct ucom_softc *sc) 1103 { 1104 DPRINTF(("ucom_cleanup: closing pipes\n")); 1105 1106 ucom_shutdown(sc); 1107 if (sc->sc_bulkin_pipe != NULL) { 1108 usbd_abort_pipe(sc->sc_bulkin_pipe); 1109 usbd_close_pipe(sc->sc_bulkin_pipe); 1110 sc->sc_bulkin_pipe = NULL; 1111 } 1112 if (sc->sc_bulkout_pipe != NULL) { 1113 usbd_abort_pipe(sc->sc_bulkout_pipe); 1114 usbd_close_pipe(sc->sc_bulkout_pipe); 1115 sc->sc_bulkout_pipe = NULL; 1116 } 1117 if (sc->sc_ixfer != NULL) { 1118 usbd_free_xfer(sc->sc_ixfer); 1119 sc->sc_ixfer = NULL; 1120 } 1121 if (sc->sc_oxfer != NULL) { 1122 usbd_free_xfer(sc->sc_oxfer); 1123 sc->sc_oxfer = NULL; 1124 } 1125 } 1126 1127 #endif /* NUCOM > 0 */ 1128 1129 int 1130 ucomprint(void *aux, const char *pnp) 1131 { 1132 struct ucom_attach_args *uca = aux; 1133 1134 if (pnp) 1135 aprint_normal("ucom at %s", pnp); 1136 if (uca->portno != UCOM_UNK_PORTNO) 1137 aprint_normal(" portno %d", uca->portno); 1138 return (UNCONF); 1139 } 1140 1141 int 1142 ucomsubmatch(struct device *parent, struct cfdata *cf, 1143 const int *ldesc __unused, void *aux) 1144 { 1145 struct ucom_attach_args *uca = aux; 1146 1147 if (uca->portno != UCOM_UNK_PORTNO && 1148 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1149 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1150 return (0); 1151 return (config_match(parent, cf, aux)); 1152 } 1153