1 /* $NetBSD: ucom.c,v 1.58 2005/09/06 21:40:45 kleink 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 1.58 2005/09/06 21:40:45 kleink 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 #if defined(__NetBSD__) 59 #include "rnd.h" 60 #if NRND > 0 61 #include <sys/rnd.h> 62 #endif 63 #endif 64 65 #include <dev/usb/usb.h> 66 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 #include <dev/usb/usbdevs.h> 70 #include <dev/usb/usb_quirks.h> 71 72 #include <dev/usb/ucomvar.h> 73 74 #include "ucom.h" 75 76 #include "locators.h" 77 78 #if NUCOM > 0 79 80 #ifdef UCOM_DEBUG 81 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 82 int ucomdebug = 0; 83 #else 84 #define DPRINTFN(n, x) 85 #endif 86 #define DPRINTF(x) DPRINTFN(0, x) 87 88 #define UCOMUNIT_MASK 0x3ffff 89 #define UCOMDIALOUT_MASK 0x80000 90 #define UCOMCALLUNIT_MASK 0x40000 91 92 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 93 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 94 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 95 96 struct ucom_softc { 97 USBBASEDEVICE sc_dev; /* base device */ 98 99 usbd_device_handle sc_udev; /* USB device */ 100 101 usbd_interface_handle sc_iface; /* data interface */ 102 103 int sc_bulkin_no; /* bulk in endpoint address */ 104 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 105 usbd_xfer_handle sc_ixfer; /* read request */ 106 u_char *sc_ibuf; /* read buffer */ 107 u_int sc_ibufsize; /* read buffer size */ 108 u_int sc_ibufsizepad; /* read buffer size padded */ 109 110 int sc_bulkout_no; /* bulk out endpoint address */ 111 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 112 usbd_xfer_handle sc_oxfer; /* write request */ 113 u_char *sc_obuf; /* write buffer */ 114 u_int sc_obufsize; /* write buffer size */ 115 u_int sc_opkthdrlen; /* header length of 116 * output packet */ 117 118 struct ucom_methods *sc_methods; 119 void *sc_parent; 120 int sc_portno; 121 122 struct tty *sc_tty; /* our tty */ 123 u_char sc_lsr; 124 u_char sc_msr; 125 u_char sc_mcr; 126 u_char sc_tx_stopped; 127 int sc_swflags; 128 129 u_char sc_opening; /* lock during open */ 130 int sc_refcnt; 131 u_char sc_dying; /* disconnecting */ 132 133 #if defined(__NetBSD__) && NRND > 0 134 rndsource_element_t sc_rndsource; /* random source */ 135 #endif 136 }; 137 138 dev_type_open(ucomopen); 139 dev_type_close(ucomclose); 140 dev_type_read(ucomread); 141 dev_type_write(ucomwrite); 142 dev_type_ioctl(ucomioctl); 143 dev_type_stop(ucomstop); 144 dev_type_tty(ucomtty); 145 dev_type_poll(ucompoll); 146 147 const struct cdevsw ucom_cdevsw = { 148 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 149 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 150 }; 151 152 Static void ucom_cleanup(struct ucom_softc *); 153 Static void ucom_hwiflow(struct ucom_softc *); 154 Static int ucomparam(struct tty *, struct termios *); 155 Static void ucomstart(struct tty *); 156 Static void ucom_shutdown(struct ucom_softc *); 157 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 158 int, usb_proc_ptr); 159 Static void ucom_dtr(struct ucom_softc *, int); 160 Static void ucom_rts(struct ucom_softc *, int); 161 Static void ucom_break(struct ucom_softc *, int); 162 Static usbd_status ucomstartread(struct ucom_softc *); 163 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 164 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 165 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 166 Static int ucom_to_tiocm(struct ucom_softc *); 167 168 USB_DECLARE_DRIVER(ucom); 169 170 USB_MATCH(ucom) 171 { 172 return (1); 173 } 174 175 USB_ATTACH(ucom) 176 { 177 struct ucom_softc *sc = (struct ucom_softc *)self; 178 struct ucom_attach_args *uca = aux; 179 struct tty *tp; 180 181 if (uca->portno != UCOM_UNK_PORTNO) 182 printf(": portno %d", uca->portno); 183 if (uca->info != NULL) 184 printf(", %s", uca->info); 185 printf("\n"); 186 187 sc->sc_udev = uca->device; 188 sc->sc_iface = uca->iface; 189 sc->sc_bulkout_no = uca->bulkout; 190 sc->sc_bulkin_no = uca->bulkin; 191 sc->sc_ibufsize = uca->ibufsize; 192 sc->sc_ibufsizepad = uca->ibufsizepad; 193 sc->sc_obufsize = uca->obufsize; 194 sc->sc_opkthdrlen = uca->opkthdrlen; 195 sc->sc_methods = uca->methods; 196 sc->sc_parent = uca->arg; 197 sc->sc_portno = uca->portno; 198 199 tp = ttymalloc(); 200 tp->t_oproc = ucomstart; 201 tp->t_param = ucomparam; 202 sc->sc_tty = tp; 203 204 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 205 tty_attach(tp); 206 207 #if defined(__NetBSD__) && NRND > 0 208 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 209 RND_TYPE_TTY, 0); 210 #endif 211 212 USB_ATTACH_SUCCESS_RETURN; 213 } 214 215 USB_DETACH(ucom) 216 { 217 struct ucom_softc *sc = (struct ucom_softc *)self; 218 struct tty *tp = sc->sc_tty; 219 int maj, mn; 220 int s; 221 222 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 223 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 224 225 sc->sc_dying = 1; 226 227 if (sc->sc_bulkin_pipe != NULL) 228 usbd_abort_pipe(sc->sc_bulkin_pipe); 229 if (sc->sc_bulkout_pipe != NULL) 230 usbd_abort_pipe(sc->sc_bulkout_pipe); 231 232 s = splusb(); 233 if (--sc->sc_refcnt >= 0) { 234 /* Wake up anyone waiting */ 235 if (tp != NULL) { 236 CLR(tp->t_state, TS_CARR_ON); 237 CLR(tp->t_cflag, CLOCAL | MDMBUF); 238 ttyflush(tp, FREAD|FWRITE); 239 } 240 /* Wait for processes to go away. */ 241 usb_detach_wait(USBDEV(sc->sc_dev)); 242 } 243 splx(s); 244 245 /* locate the major number */ 246 maj = cdevsw_lookup_major(&ucom_cdevsw); 247 248 /* Nuke the vnodes for any open instances. */ 249 mn = self->dv_unit; 250 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 251 vdevgone(maj, mn, mn, VCHR); 252 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 253 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 254 255 /* Detach and free the tty. */ 256 if (tp != NULL) { 257 tty_detach(tp); 258 ttyfree(tp); 259 sc->sc_tty = NULL; 260 } 261 262 /* Detach the random source */ 263 #if defined(__NetBSD__) && NRND > 0 264 rnd_detach_source(&sc->sc_rndsource); 265 #endif 266 267 return (0); 268 } 269 270 int 271 ucom_activate(device_ptr_t self, enum devact act) 272 { 273 struct ucom_softc *sc = (struct ucom_softc *)self; 274 275 DPRINTFN(5,("ucom_activate: %d\n", act)); 276 277 switch (act) { 278 case DVACT_ACTIVATE: 279 return (EOPNOTSUPP); 280 281 case DVACT_DEACTIVATE: 282 sc->sc_dying = 1; 283 break; 284 } 285 return (0); 286 } 287 288 void 289 ucom_shutdown(struct ucom_softc *sc) 290 { 291 struct tty *tp = sc->sc_tty; 292 293 DPRINTF(("ucom_shutdown\n")); 294 /* 295 * Hang up if necessary. Wait a bit, so the other side has time to 296 * notice even if we immediately open the port again. 297 */ 298 if (ISSET(tp->t_cflag, HUPCL)) { 299 ucom_dtr(sc, 0); 300 (void)tsleep(sc, TTIPRI, ttclos, hz); 301 } 302 } 303 304 int 305 ucomopen(dev_t dev, int flag, int mode, usb_proc_ptr p) 306 { 307 int unit = UCOMUNIT(dev); 308 usbd_status err; 309 struct ucom_softc *sc; 310 struct tty *tp; 311 int s; 312 int error; 313 314 if (unit >= ucom_cd.cd_ndevs) 315 return (ENXIO); 316 sc = ucom_cd.cd_devs[unit]; 317 if (sc == NULL) 318 return (ENXIO); 319 320 if (sc->sc_dying) 321 return (EIO); 322 323 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 324 return (ENXIO); 325 326 tp = sc->sc_tty; 327 328 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 329 330 if (ISSET(tp->t_state, TS_ISOPEN) && 331 ISSET(tp->t_state, TS_XCLUDE) && 332 suser(p->p_ucred, &p->p_acflag) != 0) 333 return (EBUSY); 334 335 s = spltty(); 336 337 /* 338 * Do the following iff this is a first open. 339 */ 340 while (sc->sc_opening) 341 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 342 343 if (sc->sc_dying) { 344 splx(s); 345 return (EIO); 346 } 347 sc->sc_opening = 1; 348 349 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 350 struct termios t; 351 352 tp->t_dev = dev; 353 354 if (sc->sc_methods->ucom_open != NULL) { 355 error = sc->sc_methods->ucom_open(sc->sc_parent, 356 sc->sc_portno); 357 if (error) { 358 ucom_cleanup(sc); 359 sc->sc_opening = 0; 360 wakeup(&sc->sc_opening); 361 splx(s); 362 return (error); 363 } 364 } 365 366 ucom_status_change(sc); 367 368 /* 369 * Initialize the termios status to the defaults. Add in the 370 * sticky bits from TIOCSFLAGS. 371 */ 372 t.c_ispeed = 0; 373 t.c_ospeed = TTYDEF_SPEED; 374 t.c_cflag = TTYDEF_CFLAG; 375 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 376 SET(t.c_cflag, CLOCAL); 377 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 378 SET(t.c_cflag, CRTSCTS); 379 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 380 SET(t.c_cflag, MDMBUF); 381 /* Make sure ucomparam() will do something. */ 382 tp->t_ospeed = 0; 383 (void) ucomparam(tp, &t); 384 tp->t_iflag = TTYDEF_IFLAG; 385 tp->t_oflag = TTYDEF_OFLAG; 386 tp->t_lflag = TTYDEF_LFLAG; 387 ttychars(tp); 388 ttsetwater(tp); 389 390 /* 391 * Turn on DTR. We must always do this, even if carrier is not 392 * present, because otherwise we'd have to use TIOCSDTR 393 * immediately after setting CLOCAL, which applications do not 394 * expect. We always assert DTR while the device is open 395 * unless explicitly requested to deassert it. 396 */ 397 ucom_dtr(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, usb_proc_ptr p) 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, usb_proc_ptr p) 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, p)); 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, caddr_t data, int flag, usb_proc_ptr p) 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, p); 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, caddr_t data, 607 int flag, usb_proc_ptr p) 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, p); 619 if (error != EPASSTHROUGH) 620 return (error); 621 622 error = ttioctl(tp, cmd, data, flag, p); 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, p); 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 = suser(p->p_ucred, &p->p_acflag); 661 if (error) 662 break; 663 sc->sc_swflags = *(int *)data; 664 break; 665 666 case TIOCMSET: 667 case TIOCMBIS: 668 case TIOCMBIC: 669 tiocm_to_ucom(sc, cmd, *(int *)data); 670 break; 671 672 case TIOCMGET: 673 *(int *)data = ucom_to_tiocm(sc); 674 break; 675 676 default: 677 error = EPASSTHROUGH; 678 break; 679 } 680 681 splx(s); 682 683 return (error); 684 } 685 686 Static void 687 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 688 { 689 u_char combits; 690 691 combits = 0; 692 if (ISSET(ttybits, TIOCM_DTR)) 693 SET(combits, UMCR_DTR); 694 if (ISSET(ttybits, TIOCM_RTS)) 695 SET(combits, UMCR_RTS); 696 697 switch (how) { 698 case TIOCMBIC: 699 CLR(sc->sc_mcr, combits); 700 break; 701 702 case TIOCMBIS: 703 SET(sc->sc_mcr, combits); 704 break; 705 706 case TIOCMSET: 707 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 708 SET(sc->sc_mcr, combits); 709 break; 710 } 711 712 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 713 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 714 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 715 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 716 } 717 718 Static int 719 ucom_to_tiocm(struct ucom_softc *sc) 720 { 721 u_char combits; 722 int ttybits = 0; 723 724 combits = sc->sc_mcr; 725 if (ISSET(combits, UMCR_DTR)) 726 SET(ttybits, TIOCM_DTR); 727 if (ISSET(combits, UMCR_RTS)) 728 SET(ttybits, TIOCM_RTS); 729 730 combits = sc->sc_msr; 731 if (ISSET(combits, UMSR_DCD)) 732 SET(ttybits, TIOCM_CD); 733 if (ISSET(combits, UMSR_CTS)) 734 SET(ttybits, TIOCM_CTS); 735 if (ISSET(combits, UMSR_DSR)) 736 SET(ttybits, TIOCM_DSR); 737 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 738 SET(ttybits, TIOCM_RI); 739 740 #if 0 741 XXX; 742 if (sc->sc_ier != 0) 743 SET(ttybits, TIOCM_LE); 744 #endif 745 746 return (ttybits); 747 } 748 749 Static void 750 ucom_break(sc, onoff) 751 struct ucom_softc *sc; 752 int onoff; 753 { 754 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 755 756 if (sc->sc_methods->ucom_set != NULL) 757 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 758 UCOM_SET_BREAK, onoff); 759 } 760 761 Static void 762 ucom_dtr(struct ucom_softc *sc, int onoff) 763 { 764 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 765 766 if (sc->sc_methods->ucom_set != NULL) 767 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 768 UCOM_SET_DTR, onoff); 769 } 770 771 Static void 772 ucom_rts(struct ucom_softc *sc, int onoff) 773 { 774 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 775 776 if (sc->sc_methods->ucom_set != NULL) 777 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 778 UCOM_SET_RTS, onoff); 779 } 780 781 void 782 ucom_status_change(struct ucom_softc *sc) 783 { 784 struct tty *tp = sc->sc_tty; 785 u_char old_msr; 786 787 if (sc->sc_methods->ucom_get_status != NULL) { 788 old_msr = sc->sc_msr; 789 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 790 &sc->sc_lsr, &sc->sc_msr); 791 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 792 (*tp->t_linesw->l_modem)(tp, 793 ISSET(sc->sc_msr, UMSR_DCD)); 794 } else { 795 sc->sc_lsr = 0; 796 /* Assume DCD is present, if we have no chance to check it. */ 797 sc->sc_msr = UMSR_DCD; 798 } 799 } 800 801 Static int 802 ucomparam(struct tty *tp, struct termios *t) 803 { 804 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 805 int error; 806 807 if (sc->sc_dying) 808 return (EIO); 809 810 /* Check requested parameters. */ 811 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 812 return (EINVAL); 813 814 /* 815 * For the console, always force CLOCAL and !HUPCL, so that the port 816 * is always active. 817 */ 818 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 819 SET(t->c_cflag, CLOCAL); 820 CLR(t->c_cflag, HUPCL); 821 } 822 823 /* 824 * If there were no changes, don't do anything. This avoids dropping 825 * input and improves performance when all we did was frob things like 826 * VMIN and VTIME. 827 */ 828 if (tp->t_ospeed == t->c_ospeed && 829 tp->t_cflag == t->c_cflag) 830 return (0); 831 832 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 833 834 /* And copy to tty. */ 835 tp->t_ispeed = 0; 836 tp->t_ospeed = t->c_ospeed; 837 tp->t_cflag = t->c_cflag; 838 839 if (sc->sc_methods->ucom_param != NULL) { 840 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 841 t); 842 if (error) 843 return (error); 844 } 845 846 /* XXX worry about CHWFLOW */ 847 848 /* 849 * Update the tty layer's idea of the carrier bit, in case we changed 850 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 851 * explicit request. 852 */ 853 DPRINTF(("ucomparam: l_modem\n")); 854 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 855 856 #if 0 857 XXX what if the hardware is not open 858 if (!ISSET(t->c_cflag, CHWFLOW)) { 859 if (sc->sc_tx_stopped) { 860 sc->sc_tx_stopped = 0; 861 ucomstart(tp); 862 } 863 } 864 #endif 865 866 return (0); 867 } 868 869 /* 870 * (un)block input via hw flowcontrol 871 */ 872 Static void 873 ucom_hwiflow(struct ucom_softc *sc) 874 { 875 DPRINTF(("ucom_hwiflow:\n")); 876 #if 0 877 XXX 878 bus_space_tag_t iot = sc->sc_iot; 879 bus_space_handle_t ioh = sc->sc_ioh; 880 881 if (sc->sc_mcr_rts == 0) 882 return; 883 884 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 885 CLR(sc->sc_mcr, sc->sc_mcr_rts); 886 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 887 } else { 888 SET(sc->sc_mcr, sc->sc_mcr_rts); 889 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 890 } 891 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 892 #endif 893 } 894 895 Static void 896 ucomstart(struct tty *tp) 897 { 898 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 899 usbd_status err; 900 int s; 901 u_char *data; 902 int cnt; 903 904 if (sc->sc_dying) 905 return; 906 907 s = spltty(); 908 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 909 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 910 goto out; 911 } 912 if (sc->sc_tx_stopped) 913 goto out; 914 915 if (tp->t_outq.c_cc <= tp->t_lowat) { 916 if (ISSET(tp->t_state, TS_ASLEEP)) { 917 CLR(tp->t_state, TS_ASLEEP); 918 wakeup(&tp->t_outq); 919 } 920 selwakeup(&tp->t_wsel); 921 if (tp->t_outq.c_cc == 0) 922 goto out; 923 } 924 925 /* Grab the first contiguous region of buffer space. */ 926 data = tp->t_outq.c_cf; 927 cnt = ndqb(&tp->t_outq, 0); 928 929 if (cnt == 0) { 930 DPRINTF(("ucomstart: cnt==0\n")); 931 goto out; 932 } 933 934 SET(tp->t_state, TS_BUSY); 935 936 if (cnt > sc->sc_obufsize) { 937 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 938 cnt = sc->sc_obufsize; 939 } 940 if (sc->sc_methods->ucom_write != NULL) 941 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 942 sc->sc_obuf, data, &cnt); 943 else 944 memcpy(sc->sc_obuf, data, cnt); 945 946 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 947 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 948 (usbd_private_handle)sc, sc->sc_obuf, cnt, 949 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 950 /* What can we do on error? */ 951 err = usbd_transfer(sc->sc_oxfer); 952 #ifdef DIAGNOSTIC 953 if (err != USBD_IN_PROGRESS) 954 printf("ucomstart: err=%s\n", usbd_errstr(err)); 955 #endif 956 957 out: 958 splx(s); 959 } 960 961 void 962 ucomstop(struct tty *tp, int flag) 963 { 964 DPRINTF(("ucomstop: flag=%d\n", flag)); 965 #if 0 966 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 967 int s; 968 969 s = spltty(); 970 if (ISSET(tp->t_state, TS_BUSY)) { 971 DPRINTF(("ucomstop: XXX\n")); 972 /* sc->sc_tx_stopped = 1; */ 973 if (!ISSET(tp->t_state, TS_TTSTOP)) 974 SET(tp->t_state, TS_FLUSH); 975 } 976 splx(s); 977 #endif 978 } 979 980 Static void 981 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 982 { 983 struct ucom_softc *sc = (struct ucom_softc *)p; 984 struct tty *tp = sc->sc_tty; 985 u_int32_t cc; 986 int s; 987 988 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 989 990 if (status == USBD_CANCELLED || sc->sc_dying) 991 goto error; 992 993 if (status) { 994 DPRINTF(("ucomwritecb: status=%d\n", status)); 995 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 996 /* XXX we should restart after some delay. */ 997 goto error; 998 } 999 1000 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 1001 #if defined(__NetBSD__) && NRND > 0 1002 rnd_add_uint32(&sc->sc_rndsource, cc); 1003 #endif 1004 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 1005 /* convert from USB bytes to tty bytes */ 1006 cc -= sc->sc_opkthdrlen; 1007 1008 s = spltty(); 1009 CLR(tp->t_state, TS_BUSY); 1010 if (ISSET(tp->t_state, TS_FLUSH)) 1011 CLR(tp->t_state, TS_FLUSH); 1012 else 1013 ndflush(&tp->t_outq, cc); 1014 (*tp->t_linesw->l_start)(tp); 1015 splx(s); 1016 return; 1017 1018 error: 1019 s = spltty(); 1020 CLR(tp->t_state, TS_BUSY); 1021 splx(s); 1022 } 1023 1024 Static usbd_status 1025 ucomstartread(struct ucom_softc *sc) 1026 { 1027 usbd_status err; 1028 1029 DPRINTFN(5,("ucomstartread: start\n")); 1030 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1031 (usbd_private_handle)sc, 1032 sc->sc_ibuf, sc->sc_ibufsize, 1033 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1034 USBD_NO_TIMEOUT, ucomreadcb); 1035 err = usbd_transfer(sc->sc_ixfer); 1036 if (err != USBD_IN_PROGRESS) { 1037 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1038 return (err); 1039 } 1040 return (USBD_NORMAL_COMPLETION); 1041 } 1042 1043 Static void 1044 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1045 { 1046 struct ucom_softc *sc = (struct ucom_softc *)p; 1047 struct tty *tp = sc->sc_tty; 1048 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1049 usbd_status err; 1050 u_int32_t cc; 1051 u_char *cp; 1052 int s; 1053 1054 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1055 1056 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1057 sc->sc_dying) { 1058 DPRINTF(("ucomreadcb: dying\n")); 1059 /* Send something to wake upper layer */ 1060 s = spltty(); 1061 (*rint)('\n', tp); 1062 ttwakeup(tp); 1063 splx(s); 1064 return; 1065 } 1066 1067 if (status) { 1068 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1069 /* XXX we should restart after some delay. */ 1070 return; 1071 } 1072 1073 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1074 #if defined(__NetBSD__) && NRND > 0 1075 rnd_add_uint32(&sc->sc_rndsource, cc); 1076 #endif 1077 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1078 if (sc->sc_methods->ucom_read != NULL) 1079 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1080 &cp, &cc); 1081 1082 s = spltty(); 1083 /* Give characters to tty layer. */ 1084 while (cc-- > 0) { 1085 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1086 if ((*rint)(*cp++, tp) == -1) { 1087 /* XXX what should we do? */ 1088 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1089 cc); 1090 break; 1091 } 1092 } 1093 splx(s); 1094 1095 err = ucomstartread(sc); 1096 if (err) { 1097 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1098 /* XXX what should we dow now? */ 1099 } 1100 } 1101 1102 Static void 1103 ucom_cleanup(struct ucom_softc *sc) 1104 { 1105 DPRINTF(("ucom_cleanup: closing pipes\n")); 1106 1107 ucom_shutdown(sc); 1108 if (sc->sc_bulkin_pipe != NULL) { 1109 usbd_abort_pipe(sc->sc_bulkin_pipe); 1110 usbd_close_pipe(sc->sc_bulkin_pipe); 1111 sc->sc_bulkin_pipe = NULL; 1112 } 1113 if (sc->sc_bulkout_pipe != NULL) { 1114 usbd_abort_pipe(sc->sc_bulkout_pipe); 1115 usbd_close_pipe(sc->sc_bulkout_pipe); 1116 sc->sc_bulkout_pipe = NULL; 1117 } 1118 if (sc->sc_ixfer != NULL) { 1119 usbd_free_xfer(sc->sc_ixfer); 1120 sc->sc_ixfer = NULL; 1121 } 1122 if (sc->sc_oxfer != NULL) { 1123 usbd_free_xfer(sc->sc_oxfer); 1124 sc->sc_oxfer = NULL; 1125 } 1126 } 1127 1128 #endif /* NUCOM > 0 */ 1129 1130 int 1131 ucomprint(void *aux, const char *pnp) 1132 { 1133 struct ucom_attach_args *uca = aux; 1134 1135 if (pnp) 1136 aprint_normal("ucom at %s", pnp); 1137 if (uca->portno != UCOM_UNK_PORTNO) 1138 aprint_normal(" portno %d", uca->portno); 1139 return (UNCONF); 1140 } 1141 1142 int 1143 ucomsubmatch(struct device *parent, struct cfdata *cf, 1144 const int *ldesc, void *aux) 1145 { 1146 struct ucom_attach_args *uca = aux; 1147 1148 if (uca->portno != UCOM_UNK_PORTNO && 1149 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1150 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1151 return (0); 1152 return (config_match(parent, cf, aux)); 1153 } 1154