1 /* $NetBSD: ucom.c,v 1.73 2007/11/19 18:51:50 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 1.73 2007/11/19 18:51:50 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, void *, 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 mutex_spin_enter(&tty_lock); 236 CLR(tp->t_state, TS_CARR_ON); 237 CLR(tp->t_cflag, CLOCAL | MDMBUF); 238 ttyflush(tp, FREAD|FWRITE); 239 mutex_spin_exit(&tty_lock); 240 } 241 /* Wait for processes to go away. */ 242 usb_detach_wait(USBDEV(sc->sc_dev)); 243 } 244 splx(s); 245 246 /* locate the major number */ 247 maj = cdevsw_lookup_major(&ucom_cdevsw); 248 249 /* Nuke the vnodes for any open instances. */ 250 mn = device_unit(self); 251 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 252 vdevgone(maj, mn, mn, VCHR); 253 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 254 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 255 256 /* Detach and free the tty. */ 257 if (tp != NULL) { 258 tty_detach(tp); 259 ttyfree(tp); 260 sc->sc_tty = NULL; 261 } 262 263 /* Detach the random source */ 264 #if defined(__NetBSD__) && NRND > 0 265 rnd_detach_source(&sc->sc_rndsource); 266 #endif 267 268 return (0); 269 } 270 271 int 272 ucom_activate(device_ptr_t self, enum devact act) 273 { 274 struct ucom_softc *sc = (struct ucom_softc *)self; 275 276 DPRINTFN(5,("ucom_activate: %d\n", act)); 277 278 switch (act) { 279 case DVACT_ACTIVATE: 280 return (EOPNOTSUPP); 281 282 case DVACT_DEACTIVATE: 283 sc->sc_dying = 1; 284 break; 285 } 286 return (0); 287 } 288 289 void 290 ucom_shutdown(struct ucom_softc *sc) 291 { 292 struct tty *tp = sc->sc_tty; 293 294 DPRINTF(("ucom_shutdown\n")); 295 /* 296 * Hang up if necessary. Wait a bit, so the other side has time to 297 * notice even if we immediately open the port again. 298 */ 299 if (ISSET(tp->t_cflag, HUPCL)) { 300 ucom_dtr(sc, 0); 301 (void)tsleep(sc, TTIPRI, ttclos, hz); 302 } 303 } 304 305 int 306 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 307 { 308 int unit = UCOMUNIT(dev); 309 usbd_status err; 310 struct ucom_softc *sc; 311 struct tty *tp; 312 int s; 313 int error; 314 315 if (unit >= ucom_cd.cd_ndevs) 316 return (ENXIO); 317 sc = ucom_cd.cd_devs[unit]; 318 if (sc == NULL) 319 return (ENXIO); 320 321 if (sc->sc_dying) 322 return (EIO); 323 324 if (!device_is_active(&sc->sc_dev)) 325 return (ENXIO); 326 327 tp = sc->sc_tty; 328 329 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 330 331 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 332 return (EBUSY); 333 334 s = spltty(); 335 336 /* 337 * Do the following iff this is a first open. 338 */ 339 while (sc->sc_opening) 340 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 341 342 if (sc->sc_dying) { 343 splx(s); 344 return (EIO); 345 } 346 sc->sc_opening = 1; 347 348 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 349 struct termios t; 350 351 tp->t_dev = dev; 352 353 if (sc->sc_methods->ucom_open != NULL) { 354 error = sc->sc_methods->ucom_open(sc->sc_parent, 355 sc->sc_portno); 356 if (error) { 357 ucom_cleanup(sc); 358 sc->sc_opening = 0; 359 wakeup(&sc->sc_opening); 360 splx(s); 361 return (error); 362 } 363 } 364 365 ucom_status_change(sc); 366 367 /* 368 * Initialize the termios status to the defaults. Add in the 369 * sticky bits from TIOCSFLAGS. 370 */ 371 t.c_ispeed = 0; 372 t.c_ospeed = TTYDEF_SPEED; 373 t.c_cflag = TTYDEF_CFLAG; 374 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 375 SET(t.c_cflag, CLOCAL); 376 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 377 SET(t.c_cflag, CRTSCTS); 378 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 379 SET(t.c_cflag, MDMBUF); 380 /* Make sure ucomparam() will do something. */ 381 tp->t_ospeed = 0; 382 (void) ucomparam(tp, &t); 383 tp->t_iflag = TTYDEF_IFLAG; 384 tp->t_oflag = TTYDEF_OFLAG; 385 tp->t_lflag = TTYDEF_LFLAG; 386 ttychars(tp); 387 ttsetwater(tp); 388 389 /* 390 * Turn on DTR. We must always do this, even if carrier is not 391 * present, because otherwise we'd have to use TIOCSDTR 392 * immediately after setting CLOCAL, which applications do not 393 * expect. We always assert DTR while the device is open 394 * unless explicitly requested to deassert it. Ditto RTS. 395 */ 396 ucom_dtr(sc, 1); 397 ucom_rts(sc, 1); 398 399 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 400 ucom_hwiflow(sc); 401 402 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 403 sc->sc_bulkin_no, sc->sc_bulkout_no)); 404 405 /* Open the bulk pipes */ 406 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 407 &sc->sc_bulkin_pipe); 408 if (err) { 409 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 410 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 411 usbd_errstr(err))); 412 error = EIO; 413 goto fail_0; 414 } 415 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 416 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 417 if (err) { 418 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 419 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 420 usbd_errstr(err))); 421 error = EIO; 422 goto fail_1; 423 } 424 425 /* Allocate a request and an input buffer and start reading. */ 426 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 427 if (sc->sc_ixfer == NULL) { 428 error = ENOMEM; 429 goto fail_2; 430 } 431 432 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 433 sc->sc_ibufsizepad); 434 if (sc->sc_ibuf == NULL) { 435 error = ENOMEM; 436 goto fail_3; 437 } 438 439 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 440 if (sc->sc_oxfer == NULL) { 441 error = ENOMEM; 442 goto fail_3; 443 } 444 445 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 446 sc->sc_obufsize + 447 sc->sc_opkthdrlen); 448 if (sc->sc_obuf == NULL) { 449 error = ENOMEM; 450 goto fail_4; 451 } 452 453 ucomstartread(sc); 454 } 455 sc->sc_opening = 0; 456 wakeup(&sc->sc_opening); 457 splx(s); 458 459 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 460 if (error) 461 goto bad; 462 463 error = (*tp->t_linesw->l_open)(dev, tp); 464 if (error) 465 goto bad; 466 467 return (0); 468 469 fail_4: 470 usbd_free_xfer(sc->sc_oxfer); 471 sc->sc_oxfer = NULL; 472 fail_3: 473 usbd_free_xfer(sc->sc_ixfer); 474 sc->sc_ixfer = NULL; 475 fail_2: 476 usbd_close_pipe(sc->sc_bulkout_pipe); 477 sc->sc_bulkout_pipe = NULL; 478 fail_1: 479 usbd_close_pipe(sc->sc_bulkin_pipe); 480 sc->sc_bulkin_pipe = NULL; 481 fail_0: 482 sc->sc_opening = 0; 483 wakeup(&sc->sc_opening); 484 splx(s); 485 return (error); 486 487 bad: 488 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 489 /* 490 * We failed to open the device, and nobody else had it opened. 491 * Clean up the state as appropriate. 492 */ 493 ucom_cleanup(sc); 494 } 495 496 return (error); 497 } 498 499 int 500 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 501 { 502 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 503 struct tty *tp = sc->sc_tty; 504 505 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 506 if (!ISSET(tp->t_state, TS_ISOPEN)) 507 return (0); 508 509 sc->sc_refcnt++; 510 511 (*tp->t_linesw->l_close)(tp, flag); 512 ttyclose(tp); 513 514 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 515 /* 516 * Although we got a last close, the device may still be in 517 * use; e.g. if this was the dialout node, and there are still 518 * processes waiting for carrier on the non-dialout node. 519 */ 520 ucom_cleanup(sc); 521 } 522 523 if (sc->sc_methods->ucom_close != NULL) 524 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 525 526 if (--sc->sc_refcnt < 0) 527 usb_detach_wakeup(USBDEV(sc->sc_dev)); 528 529 return (0); 530 } 531 532 int 533 ucomread(dev_t dev, struct uio *uio, int flag) 534 { 535 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 536 struct tty *tp = sc->sc_tty; 537 int error; 538 539 if (sc->sc_dying) 540 return (EIO); 541 542 sc->sc_refcnt++; 543 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 544 if (--sc->sc_refcnt < 0) 545 usb_detach_wakeup(USBDEV(sc->sc_dev)); 546 return (error); 547 } 548 549 int 550 ucomwrite(dev_t dev, struct uio *uio, int flag) 551 { 552 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 553 struct tty *tp = sc->sc_tty; 554 int error; 555 556 if (sc->sc_dying) 557 return (EIO); 558 559 sc->sc_refcnt++; 560 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 561 if (--sc->sc_refcnt < 0) 562 usb_detach_wakeup(USBDEV(sc->sc_dev)); 563 return (error); 564 } 565 566 int 567 ucompoll(dev_t dev, int events, struct lwp *l) 568 { 569 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 570 struct tty *tp = sc->sc_tty; 571 int revents; 572 573 if (sc->sc_dying) 574 return (POLLHUP); 575 576 sc->sc_refcnt++; 577 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 578 if (--sc->sc_refcnt < 0) 579 usb_detach_wakeup(USBDEV(sc->sc_dev)); 580 return (revents); 581 } 582 583 struct tty * 584 ucomtty(dev_t dev) 585 { 586 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 587 struct tty *tp = sc->sc_tty; 588 589 return (tp); 590 } 591 592 int 593 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 594 { 595 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 596 int error; 597 598 sc->sc_refcnt++; 599 error = ucom_do_ioctl(sc, cmd, data, flag, l); 600 if (--sc->sc_refcnt < 0) 601 usb_detach_wakeup(USBDEV(sc->sc_dev)); 602 return (error); 603 } 604 605 Static int 606 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 607 int flag, struct lwp *l) 608 { 609 struct tty *tp = sc->sc_tty; 610 int error; 611 int s; 612 613 if (sc->sc_dying) 614 return (EIO); 615 616 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 617 618 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 619 if (error != EPASSTHROUGH) 620 return (error); 621 622 error = ttioctl(tp, cmd, data, flag, l); 623 if (error != EPASSTHROUGH) 624 return (error); 625 626 if (sc->sc_methods->ucom_ioctl != NULL) { 627 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 628 sc->sc_portno, cmd, data, flag, l->l_proc); 629 if (error != EPASSTHROUGH) 630 return (error); 631 } 632 633 error = 0; 634 635 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 636 s = spltty(); 637 638 switch (cmd) { 639 case TIOCSBRK: 640 ucom_break(sc, 1); 641 break; 642 643 case TIOCCBRK: 644 ucom_break(sc, 0); 645 break; 646 647 case TIOCSDTR: 648 ucom_dtr(sc, 1); 649 break; 650 651 case TIOCCDTR: 652 ucom_dtr(sc, 0); 653 break; 654 655 case TIOCGFLAGS: 656 *(int *)data = sc->sc_swflags; 657 break; 658 659 case TIOCSFLAGS: 660 error = kauth_authorize_device_tty(l->l_cred, 661 KAUTH_DEVICE_TTY_PRIVSET, tp); 662 if (error) 663 break; 664 sc->sc_swflags = *(int *)data; 665 break; 666 667 case TIOCMSET: 668 case TIOCMBIS: 669 case TIOCMBIC: 670 tiocm_to_ucom(sc, cmd, *(int *)data); 671 break; 672 673 case TIOCMGET: 674 *(int *)data = ucom_to_tiocm(sc); 675 break; 676 677 default: 678 error = EPASSTHROUGH; 679 break; 680 } 681 682 splx(s); 683 684 return (error); 685 } 686 687 Static void 688 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 689 { 690 u_char combits; 691 692 combits = 0; 693 if (ISSET(ttybits, TIOCM_DTR)) 694 SET(combits, UMCR_DTR); 695 if (ISSET(ttybits, TIOCM_RTS)) 696 SET(combits, UMCR_RTS); 697 698 switch (how) { 699 case TIOCMBIC: 700 CLR(sc->sc_mcr, combits); 701 break; 702 703 case TIOCMBIS: 704 SET(sc->sc_mcr, combits); 705 break; 706 707 case TIOCMSET: 708 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 709 SET(sc->sc_mcr, combits); 710 break; 711 } 712 713 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 714 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 715 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 716 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 717 } 718 719 Static int 720 ucom_to_tiocm(struct ucom_softc *sc) 721 { 722 u_char combits; 723 int ttybits = 0; 724 725 combits = sc->sc_mcr; 726 if (ISSET(combits, UMCR_DTR)) 727 SET(ttybits, TIOCM_DTR); 728 if (ISSET(combits, UMCR_RTS)) 729 SET(ttybits, TIOCM_RTS); 730 731 combits = sc->sc_msr; 732 if (ISSET(combits, UMSR_DCD)) 733 SET(ttybits, TIOCM_CD); 734 if (ISSET(combits, UMSR_CTS)) 735 SET(ttybits, TIOCM_CTS); 736 if (ISSET(combits, UMSR_DSR)) 737 SET(ttybits, TIOCM_DSR); 738 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 739 SET(ttybits, TIOCM_RI); 740 741 #if 0 742 XXX; 743 if (sc->sc_ier != 0) 744 SET(ttybits, TIOCM_LE); 745 #endif 746 747 return (ttybits); 748 } 749 750 Static void 751 ucom_break(sc, onoff) 752 struct ucom_softc *sc; 753 int onoff; 754 { 755 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 756 757 if (sc->sc_methods->ucom_set != NULL) 758 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 759 UCOM_SET_BREAK, onoff); 760 } 761 762 Static void 763 ucom_dtr(struct ucom_softc *sc, int onoff) 764 { 765 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 766 767 if (sc->sc_methods->ucom_set != NULL) 768 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 769 UCOM_SET_DTR, onoff); 770 } 771 772 Static void 773 ucom_rts(struct ucom_softc *sc, int onoff) 774 { 775 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 776 777 if (sc->sc_methods->ucom_set != NULL) 778 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 779 UCOM_SET_RTS, onoff); 780 } 781 782 void 783 ucom_status_change(struct ucom_softc *sc) 784 { 785 struct tty *tp = sc->sc_tty; 786 u_char old_msr; 787 788 if (sc->sc_methods->ucom_get_status != NULL) { 789 old_msr = sc->sc_msr; 790 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 791 &sc->sc_lsr, &sc->sc_msr); 792 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 793 (*tp->t_linesw->l_modem)(tp, 794 ISSET(sc->sc_msr, UMSR_DCD)); 795 } else { 796 sc->sc_lsr = 0; 797 /* Assume DCD is present, if we have no chance to check it. */ 798 sc->sc_msr = UMSR_DCD; 799 } 800 } 801 802 Static int 803 ucomparam(struct tty *tp, struct termios *t) 804 { 805 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 806 int error; 807 808 if (sc->sc_dying) 809 return (EIO); 810 811 /* Check requested parameters. */ 812 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 813 return (EINVAL); 814 815 /* 816 * For the console, always force CLOCAL and !HUPCL, so that the port 817 * is always active. 818 */ 819 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 820 SET(t->c_cflag, CLOCAL); 821 CLR(t->c_cflag, HUPCL); 822 } 823 824 /* 825 * If there were no changes, don't do anything. This avoids dropping 826 * input and improves performance when all we did was frob things like 827 * VMIN and VTIME. 828 */ 829 if (tp->t_ospeed == t->c_ospeed && 830 tp->t_cflag == t->c_cflag) 831 return (0); 832 833 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 834 835 /* And copy to tty. */ 836 tp->t_ispeed = 0; 837 tp->t_ospeed = t->c_ospeed; 838 tp->t_cflag = t->c_cflag; 839 840 if (sc->sc_methods->ucom_param != NULL) { 841 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 842 t); 843 if (error) 844 return (error); 845 } 846 847 /* XXX worry about CHWFLOW */ 848 849 /* 850 * Update the tty layer's idea of the carrier bit, in case we changed 851 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 852 * explicit request. 853 */ 854 DPRINTF(("ucomparam: l_modem\n")); 855 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 856 857 #if 0 858 XXX what if the hardware is not open 859 if (!ISSET(t->c_cflag, CHWFLOW)) { 860 if (sc->sc_tx_stopped) { 861 sc->sc_tx_stopped = 0; 862 ucomstart(tp); 863 } 864 } 865 #endif 866 867 return (0); 868 } 869 870 /* 871 * (un)block input via hw flowcontrol 872 */ 873 Static void 874 ucom_hwiflow(struct ucom_softc *sc) 875 { 876 DPRINTF(("ucom_hwiflow:\n")); 877 #if 0 878 XXX 879 bus_space_tag_t iot = sc->sc_iot; 880 bus_space_handle_t ioh = sc->sc_ioh; 881 882 if (sc->sc_mcr_rts == 0) 883 return; 884 885 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 886 CLR(sc->sc_mcr, sc->sc_mcr_rts); 887 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 888 } else { 889 SET(sc->sc_mcr, sc->sc_mcr_rts); 890 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 891 } 892 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 893 #endif 894 } 895 896 Static void 897 ucomstart(struct tty *tp) 898 { 899 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 900 usbd_status err; 901 int s; 902 u_char *data; 903 int cnt; 904 905 if (sc->sc_dying) 906 return; 907 908 s = spltty(); 909 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 910 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 911 goto out; 912 } 913 if (sc->sc_tx_stopped) 914 goto out; 915 916 if (!ttypull(tp)) 917 goto out; 918 919 /* Grab the first contiguous region of buffer space. */ 920 data = tp->t_outq.c_cf; 921 cnt = ndqb(&tp->t_outq, 0); 922 923 if (cnt == 0) { 924 DPRINTF(("ucomstart: cnt==0\n")); 925 goto out; 926 } 927 928 SET(tp->t_state, TS_BUSY); 929 930 if (cnt > sc->sc_obufsize) { 931 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 932 cnt = sc->sc_obufsize; 933 } 934 if (sc->sc_methods->ucom_write != NULL) 935 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 936 sc->sc_obuf, data, &cnt); 937 else 938 memcpy(sc->sc_obuf, data, cnt); 939 940 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 941 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 942 (usbd_private_handle)sc, sc->sc_obuf, cnt, 943 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 944 /* What can we do on error? */ 945 err = usbd_transfer(sc->sc_oxfer); 946 #ifdef DIAGNOSTIC 947 if (err != USBD_IN_PROGRESS) 948 printf("ucomstart: err=%s\n", usbd_errstr(err)); 949 #endif 950 951 out: 952 splx(s); 953 } 954 955 void 956 ucomstop(struct tty *tp, int flag) 957 { 958 DPRINTF(("ucomstop: flag=%d\n", flag)); 959 #if 0 960 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 961 int s; 962 963 s = spltty(); 964 if (ISSET(tp->t_state, TS_BUSY)) { 965 DPRINTF(("ucomstop: XXX\n")); 966 /* sc->sc_tx_stopped = 1; */ 967 if (!ISSET(tp->t_state, TS_TTSTOP)) 968 SET(tp->t_state, TS_FLUSH); 969 } 970 splx(s); 971 #endif 972 } 973 974 Static void 975 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 976 { 977 struct ucom_softc *sc = (struct ucom_softc *)p; 978 struct tty *tp = sc->sc_tty; 979 u_int32_t cc; 980 int s; 981 982 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 983 984 if (status == USBD_CANCELLED || sc->sc_dying) 985 goto error; 986 987 if (status) { 988 DPRINTF(("ucomwritecb: status=%d\n", status)); 989 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 990 /* XXX we should restart after some delay. */ 991 goto error; 992 } 993 994 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 995 #if defined(__NetBSD__) && NRND > 0 996 rnd_add_uint32(&sc->sc_rndsource, cc); 997 #endif 998 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 999 /* convert from USB bytes to tty bytes */ 1000 cc -= sc->sc_opkthdrlen; 1001 1002 s = spltty(); 1003 CLR(tp->t_state, TS_BUSY); 1004 if (ISSET(tp->t_state, TS_FLUSH)) 1005 CLR(tp->t_state, TS_FLUSH); 1006 else 1007 ndflush(&tp->t_outq, cc); 1008 (*tp->t_linesw->l_start)(tp); 1009 splx(s); 1010 return; 1011 1012 error: 1013 s = spltty(); 1014 CLR(tp->t_state, TS_BUSY); 1015 splx(s); 1016 } 1017 1018 Static usbd_status 1019 ucomstartread(struct ucom_softc *sc) 1020 { 1021 usbd_status err; 1022 1023 DPRINTFN(5,("ucomstartread: start\n")); 1024 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1025 (usbd_private_handle)sc, 1026 sc->sc_ibuf, sc->sc_ibufsize, 1027 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1028 USBD_NO_TIMEOUT, ucomreadcb); 1029 err = usbd_transfer(sc->sc_ixfer); 1030 if (err != USBD_IN_PROGRESS) { 1031 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1032 return (err); 1033 } 1034 return (USBD_NORMAL_COMPLETION); 1035 } 1036 1037 Static void 1038 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1039 { 1040 struct ucom_softc *sc = (struct ucom_softc *)p; 1041 struct tty *tp = sc->sc_tty; 1042 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1043 usbd_status err; 1044 u_int32_t cc; 1045 u_char *cp; 1046 int s; 1047 1048 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1049 1050 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1051 sc->sc_dying) { 1052 DPRINTF(("ucomreadcb: dying\n")); 1053 /* Send something to wake upper layer */ 1054 s = spltty(); 1055 (*rint)('\n', tp); 1056 mutex_spin_enter(&tty_lock); /* XXX */ 1057 ttwakeup(tp); 1058 mutex_spin_exit(&tty_lock); /* XXX */ 1059 splx(s); 1060 return; 1061 } 1062 1063 if (status) { 1064 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1065 /* XXX we should restart after some delay. */ 1066 return; 1067 } 1068 1069 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1070 #if defined(__NetBSD__) && NRND > 0 1071 rnd_add_uint32(&sc->sc_rndsource, cc); 1072 #endif 1073 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1074 if (sc->sc_methods->ucom_read != NULL) 1075 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1076 &cp, &cc); 1077 1078 s = spltty(); 1079 /* Give characters to tty layer. */ 1080 while (cc-- > 0) { 1081 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1082 if ((*rint)(*cp++, tp) == -1) { 1083 /* XXX what should we do? */ 1084 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1085 cc); 1086 break; 1087 } 1088 } 1089 splx(s); 1090 1091 err = ucomstartread(sc); 1092 if (err) { 1093 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1094 /* XXX what should we dow now? */ 1095 } 1096 } 1097 1098 Static void 1099 ucom_cleanup(struct ucom_softc *sc) 1100 { 1101 DPRINTF(("ucom_cleanup: closing pipes\n")); 1102 1103 ucom_shutdown(sc); 1104 if (sc->sc_bulkin_pipe != NULL) { 1105 usbd_abort_pipe(sc->sc_bulkin_pipe); 1106 usbd_close_pipe(sc->sc_bulkin_pipe); 1107 sc->sc_bulkin_pipe = NULL; 1108 } 1109 if (sc->sc_bulkout_pipe != NULL) { 1110 usbd_abort_pipe(sc->sc_bulkout_pipe); 1111 usbd_close_pipe(sc->sc_bulkout_pipe); 1112 sc->sc_bulkout_pipe = NULL; 1113 } 1114 if (sc->sc_ixfer != NULL) { 1115 usbd_free_xfer(sc->sc_ixfer); 1116 sc->sc_ixfer = NULL; 1117 } 1118 if (sc->sc_oxfer != NULL) { 1119 usbd_free_xfer(sc->sc_oxfer); 1120 sc->sc_oxfer = NULL; 1121 } 1122 } 1123 1124 #endif /* NUCOM > 0 */ 1125 1126 int 1127 ucomprint(void *aux, const char *pnp) 1128 { 1129 struct ucom_attach_args *uca = aux; 1130 1131 if (pnp) 1132 aprint_normal("ucom at %s", pnp); 1133 if (uca->portno != UCOM_UNK_PORTNO) 1134 aprint_normal(" portno %d", uca->portno); 1135 return (UNCONF); 1136 } 1137 1138 int 1139 ucomsubmatch(struct device *parent, struct cfdata *cf, 1140 const int *ldesc, void *aux) 1141 { 1142 struct ucom_attach_args *uca = aux; 1143 1144 if (uca->portno != UCOM_UNK_PORTNO && 1145 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1146 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1147 return (0); 1148 return (config_match(parent, cf, aux)); 1149 } 1150