1 /* $OpenBSD: ucom.c,v 1.8 2001/05/03 02:20:33 aaron Exp $ */ 2 /* $NetBSD: ucom.c,v 1.37 2001/04/02 13:18:31 augustss Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Lennart Augustsson (lennart@augustsson.net) at 10 * Carlstedt Research & Technology. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 /* 41 * This code is very heavily based on the 16550 driver, com.c. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/ioctl.h> 48 #include <sys/conf.h> 49 #include <sys/tty.h> 50 #include <sys/file.h> 51 #include <sys/select.h> 52 #include <sys/proc.h> 53 #include <sys/vnode.h> 54 #include <sys/device.h> 55 #include <sys/poll.h> 56 57 #include <dev/usb/usb.h> 58 59 #include <dev/usb/usbdi.h> 60 #include <dev/usb/usbdi_util.h> 61 #include <dev/usb/usbdevs.h> 62 #include <dev/usb/usb_quirks.h> 63 64 #include <dev/usb/ucomvar.h> 65 66 #include "ucom.h" 67 68 #if NUCOM > 0 69 70 #ifdef UCOM_DEBUG 71 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 72 int ucomdebug = 0; 73 #else 74 #define DPRINTFN(n, x) 75 #endif 76 #define DPRINTF(x) DPRINTFN(0, x) 77 78 #if defined(__NetBSD__) 79 #define UCOMUNIT_MASK 0x3ffff 80 #define UCOMDIALOUT_MASK 0x80000 81 #define UCOMCALLUNIT_MASK 0x40000 82 #endif 83 84 #if defined(__OpenBSD__) 85 #define UCOMUNIT_MASK 0x3f 86 #define UCOMDIALOUT_MASK 0x80 87 #define UCOMCALLUNIT_MASK 0x40 88 #endif 89 90 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 91 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 92 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 93 94 struct ucom_softc { 95 USBBASEDEVICE sc_dev; /* base device */ 96 97 usbd_device_handle sc_udev; /* USB device */ 98 99 usbd_interface_handle sc_iface; /* data interface */ 100 101 int sc_bulkin_no; /* bulk in endpoint address */ 102 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 103 usbd_xfer_handle sc_ixfer; /* read request */ 104 u_char *sc_ibuf; /* read buffer */ 105 u_int sc_ibufsize; /* read buffer size */ 106 u_int sc_ibufsizepad; /* read buffer size padded */ 107 108 int sc_bulkout_no; /* bulk out endpoint address */ 109 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 110 usbd_xfer_handle sc_oxfer; /* write request */ 111 u_char *sc_obuf; /* write buffer */ 112 u_int sc_obufsize; /* write buffer size */ 113 u_int sc_opkthdrlen; /* header length of 114 * output packet */ 115 116 struct ucom_methods *sc_methods; 117 void *sc_parent; 118 int sc_portno; 119 120 struct tty *sc_tty; /* our tty */ 121 u_char sc_lsr; 122 u_char sc_msr; 123 u_char sc_mcr; 124 u_char sc_tx_stopped; 125 int sc_swflags; 126 127 u_char sc_opening; /* lock during open */ 128 int sc_refcnt; 129 u_char sc_dying; /* disconnecting */ 130 }; 131 132 cdev_decl(ucom); 133 134 Static void ucom_cleanup(struct ucom_softc *); 135 Static void ucom_hwiflow(struct ucom_softc *); 136 Static int ucomparam(struct tty *, struct termios *); 137 Static void ucomstart(struct tty *); 138 Static void ucom_shutdown(struct ucom_softc *); 139 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 140 int, struct proc *); 141 Static void ucom_dtr(struct ucom_softc *, int); 142 Static void ucom_rts(struct ucom_softc *, int); 143 Static void ucom_break(struct ucom_softc *, int); 144 Static usbd_status ucomstartread(struct ucom_softc *); 145 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 146 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 147 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 148 Static int ucom_to_tiocm(struct ucom_softc *); 149 150 USB_DECLARE_DRIVER(ucom); 151 152 USB_MATCH(ucom) 153 { 154 return (1); 155 } 156 157 USB_ATTACH(ucom) 158 { 159 struct ucom_softc *sc = (struct ucom_softc *)self; 160 struct ucom_attach_args *uca = aux; 161 struct tty *tp; 162 163 if (uca->portno != UCOM_UNK_PORTNO) 164 printf(": portno %d", uca->portno); 165 if (uca->info != NULL) 166 printf(", %s", uca->info); 167 printf("\n"); 168 169 sc->sc_udev = uca->device; 170 sc->sc_iface = uca->iface; 171 sc->sc_bulkout_no = uca->bulkout; 172 sc->sc_bulkin_no = uca->bulkin; 173 sc->sc_ibufsize = uca->ibufsize; 174 sc->sc_ibufsizepad = uca->ibufsizepad; 175 sc->sc_obufsize = uca->obufsize; 176 sc->sc_opkthdrlen = uca->opkthdrlen; 177 sc->sc_methods = uca->methods; 178 sc->sc_parent = uca->arg; 179 sc->sc_portno = uca->portno; 180 181 tp = ttymalloc(); 182 tp->t_oproc = ucomstart; 183 tp->t_param = ucomparam; 184 sc->sc_tty = tp; 185 186 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 187 tty_attach(tp); 188 189 USB_ATTACH_SUCCESS_RETURN; 190 } 191 192 USB_DETACH(ucom) 193 { 194 struct ucom_softc *sc = (struct ucom_softc *)self; 195 struct tty *tp = sc->sc_tty; 196 int maj, mn; 197 int s; 198 199 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 200 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 201 202 sc->sc_dying = 1; 203 204 if (sc->sc_bulkin_pipe != NULL) 205 usbd_abort_pipe(sc->sc_bulkin_pipe); 206 if (sc->sc_bulkout_pipe != NULL) 207 usbd_abort_pipe(sc->sc_bulkout_pipe); 208 209 s = splusb(); 210 if (--sc->sc_refcnt >= 0) { 211 /* Wake up anyone waiting */ 212 if (tp != NULL) { 213 CLR(tp->t_state, TS_CARR_ON); 214 CLR(tp->t_cflag, CLOCAL | MDMBUF); 215 ttyflush(tp, FREAD|FWRITE); 216 } 217 /* Wait for processes to go away. */ 218 usb_detach_wait(USBDEV(sc->sc_dev)); 219 } 220 splx(s); 221 222 /* locate the major number */ 223 for (maj = 0; maj < nchrdev; maj++) 224 if (cdevsw[maj].d_open == ucomopen) 225 break; 226 227 /* Nuke the vnodes for any open instances. */ 228 mn = self->dv_unit; 229 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 230 vdevgone(maj, mn, mn, VCHR); 231 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 232 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 233 234 /* Detach and free the tty. */ 235 if (tp != NULL) { 236 tty_detach(tp); 237 ttyfree(tp); 238 sc->sc_tty = NULL; 239 } 240 241 return (0); 242 } 243 244 int 245 ucom_activate(device_ptr_t self, enum devact act) 246 { 247 struct ucom_softc *sc = (struct ucom_softc *)self; 248 249 DPRINTFN(5,("ucom_activate: %d\n", act)); 250 251 switch (act) { 252 case DVACT_ACTIVATE: 253 return (EOPNOTSUPP); 254 break; 255 256 case DVACT_DEACTIVATE: 257 sc->sc_dying = 1; 258 break; 259 } 260 return (0); 261 } 262 263 void 264 ucom_shutdown(struct ucom_softc *sc) 265 { 266 struct tty *tp = sc->sc_tty; 267 268 DPRINTF(("ucom_shutdown\n")); 269 /* 270 * Hang up if necessary. Wait a bit, so the other side has time to 271 * notice even if we immediately open the port again. 272 */ 273 if (ISSET(tp->t_cflag, HUPCL)) { 274 ucom_dtr(sc, 0); 275 (void)tsleep(sc, TTIPRI, ttclos, hz); 276 } 277 } 278 279 int 280 ucomopen(dev_t dev, int flag, int mode, struct proc *p) 281 { 282 int unit = UCOMUNIT(dev); 283 usbd_status err; 284 struct ucom_softc *sc; 285 struct tty *tp; 286 int s; 287 int error; 288 289 if (unit >= ucom_cd.cd_ndevs) 290 return (ENXIO); 291 sc = ucom_cd.cd_devs[unit]; 292 if (sc == NULL) 293 return (ENXIO); 294 295 if (sc->sc_dying) 296 return (EIO); 297 298 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 299 return (ENXIO); 300 301 tp = sc->sc_tty; 302 303 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 304 305 if (ISSET(tp->t_state, TS_ISOPEN) && 306 ISSET(tp->t_state, TS_XCLUDE) && 307 p->p_ucred->cr_uid != 0) 308 return (EBUSY); 309 310 s = spltty(); 311 312 /* 313 * Do the following iff this is a first open. 314 */ 315 while (sc->sc_opening) 316 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 317 318 if (sc->sc_dying) { 319 splx(s); 320 return (EIO); 321 } 322 sc->sc_opening = 1; 323 324 #if defined(__NetBSD__) 325 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 326 #else 327 if (!ISSET(tp->t_state, TS_ISOPEN)) { 328 #endif 329 struct termios t; 330 331 tp->t_dev = dev; 332 333 if (sc->sc_methods->ucom_open != NULL) { 334 error = sc->sc_methods->ucom_open(sc->sc_parent, 335 sc->sc_portno); 336 if (error) { 337 ucom_cleanup(sc); 338 sc->sc_opening = 0; 339 wakeup(&sc->sc_opening); 340 splx(s); 341 return (error); 342 } 343 } 344 345 ucom_status_change(sc); 346 347 /* 348 * Initialize the termios status to the defaults. Add in the 349 * sticky bits from TIOCSFLAGS. 350 */ 351 t.c_ispeed = 0; 352 t.c_ospeed = TTYDEF_SPEED; 353 t.c_cflag = TTYDEF_CFLAG; 354 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 355 SET(t.c_cflag, CLOCAL); 356 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 357 SET(t.c_cflag, CRTSCTS); 358 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 359 SET(t.c_cflag, MDMBUF); 360 /* Make sure ucomparam() will do something. */ 361 tp->t_ospeed = 0; 362 (void) ucomparam(tp, &t); 363 tp->t_iflag = TTYDEF_IFLAG; 364 tp->t_oflag = TTYDEF_OFLAG; 365 tp->t_lflag = TTYDEF_LFLAG; 366 ttychars(tp); 367 ttsetwater(tp); 368 369 /* 370 * Turn on DTR. We must always do this, even if carrier is not 371 * present, because otherwise we'd have to use TIOCSDTR 372 * immediately after setting CLOCAL, which applications do not 373 * expect. We always assert DTR while the device is open 374 * unless explicitly requested to deassert it. 375 */ 376 ucom_dtr(sc, 1); 377 378 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 379 ucom_hwiflow(sc); 380 381 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 382 sc->sc_bulkin_no, sc->sc_bulkout_no)); 383 384 /* Open the bulk pipes */ 385 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 386 &sc->sc_bulkin_pipe); 387 if (err) { 388 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 389 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 390 usbd_errstr(err))); 391 error = EIO; 392 goto fail_0; 393 } 394 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 395 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 396 if (err) { 397 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 398 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 399 usbd_errstr(err))); 400 error = EIO; 401 goto fail_1; 402 } 403 404 /* Allocate a request and an input buffer and start reading. */ 405 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 406 if (sc->sc_ixfer == NULL) { 407 error = ENOMEM; 408 goto fail_2; 409 } 410 411 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 412 sc->sc_ibufsizepad); 413 if (sc->sc_ibuf == NULL) { 414 error = ENOMEM; 415 goto fail_3; 416 } 417 418 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 419 if (sc->sc_oxfer == NULL) { 420 error = ENOMEM; 421 goto fail_3; 422 } 423 424 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 425 sc->sc_obufsize + 426 sc->sc_opkthdrlen); 427 if (sc->sc_obuf == NULL) { 428 error = ENOMEM; 429 goto fail_4; 430 } 431 432 ucomstartread(sc); 433 } 434 sc->sc_opening = 0; 435 wakeup(&sc->sc_opening); 436 splx(s); 437 438 #if defined(__NetBSD__) 439 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 440 #else 441 error = ttyopen(UCOMDIALOUT(dev), tp); 442 #endif 443 if (error) 444 goto bad; 445 446 error = (*linesw[tp->t_line].l_open)(dev, tp); 447 if (error) 448 goto bad; 449 450 return (0); 451 452 fail_4: 453 usbd_free_xfer(sc->sc_oxfer); 454 sc->sc_oxfer = NULL; 455 fail_3: 456 usbd_free_xfer(sc->sc_ixfer); 457 sc->sc_ixfer = NULL; 458 fail_2: 459 usbd_close_pipe(sc->sc_bulkout_pipe); 460 sc->sc_bulkout_pipe = NULL; 461 fail_1: 462 usbd_close_pipe(sc->sc_bulkin_pipe); 463 sc->sc_bulkin_pipe = NULL; 464 fail_0: 465 sc->sc_opening = 0; 466 wakeup(&sc->sc_opening); 467 splx(s); 468 return (error); 469 470 bad: 471 #if defined(__NetBSD__) 472 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 473 #else 474 if (!ISSET(tp->t_state, TS_ISOPEN)) { 475 #endif 476 /* 477 * We failed to open the device, and nobody else had it opened. 478 * Clean up the state as appropriate. 479 */ 480 ucom_cleanup(sc); 481 } 482 483 return (error); 484 } 485 486 int 487 ucomclose(dev_t dev, int flag, int mode, struct proc *p) 488 { 489 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 490 struct tty *tp = sc->sc_tty; 491 492 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 493 if (!ISSET(tp->t_state, TS_ISOPEN)) 494 return (0); 495 496 sc->sc_refcnt++; 497 498 (*linesw[tp->t_line].l_close)(tp, flag); 499 ttyclose(tp); 500 501 #if defined(__NetBSD__) 502 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 503 #else 504 if (!ISSET(tp->t_state, TS_ISOPEN)) { 505 #endif 506 /* 507 * Although we got a last close, the device may still be in 508 * use; e.g. if this was the dialout node, and there are still 509 * processes waiting for carrier on the non-dialout node. 510 */ 511 ucom_cleanup(sc); 512 } 513 514 if (sc->sc_methods->ucom_close != NULL) 515 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 516 517 if (--sc->sc_refcnt < 0) 518 usb_detach_wakeup(USBDEV(sc->sc_dev)); 519 520 return (0); 521 } 522 523 int 524 ucomread(dev_t dev, struct uio *uio, int flag) 525 { 526 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 527 struct tty *tp = sc->sc_tty; 528 int error; 529 530 if (sc->sc_dying) 531 return (EIO); 532 533 sc->sc_refcnt++; 534 error = ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 535 if (--sc->sc_refcnt < 0) 536 usb_detach_wakeup(USBDEV(sc->sc_dev)); 537 return (error); 538 } 539 540 int 541 ucomwrite(dev_t dev, struct uio *uio, int flag) 542 { 543 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 544 struct tty *tp = sc->sc_tty; 545 int error; 546 547 if (sc->sc_dying) 548 return (EIO); 549 550 sc->sc_refcnt++; 551 error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 552 if (--sc->sc_refcnt < 0) 553 usb_detach_wakeup(USBDEV(sc->sc_dev)); 554 return (error); 555 } 556 557 struct tty * 558 ucomtty(dev_t dev) 559 { 560 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 561 struct tty *tp = sc->sc_tty; 562 563 return (tp); 564 } 565 566 int 567 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 568 { 569 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 570 int error; 571 572 sc->sc_refcnt++; 573 error = ucom_do_ioctl(sc, cmd, data, flag, p); 574 if (--sc->sc_refcnt < 0) 575 usb_detach_wakeup(USBDEV(sc->sc_dev)); 576 return (error); 577 } 578 579 Static int 580 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 581 int flag, struct proc *p) 582 { 583 struct tty *tp = sc->sc_tty; 584 int error; 585 int s; 586 587 if (sc->sc_dying) 588 return (EIO); 589 590 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 591 592 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 593 if (error >= 0) 594 return (error); 595 596 error = ttioctl(tp, cmd, data, flag, p); 597 if (error >= 0) 598 return (error); 599 600 if (sc->sc_methods->ucom_ioctl != NULL) { 601 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 602 sc->sc_portno, cmd, data, flag, p); 603 if (error >= 0) 604 return (error); 605 } 606 607 error = 0; 608 609 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 610 s = spltty(); 611 612 switch (cmd) { 613 case TIOCSBRK: 614 ucom_break(sc, 1); 615 break; 616 617 case TIOCCBRK: 618 ucom_break(sc, 0); 619 break; 620 621 case TIOCSDTR: 622 ucom_dtr(sc, 1); 623 break; 624 625 case TIOCCDTR: 626 ucom_dtr(sc, 0); 627 break; 628 629 case TIOCGFLAGS: 630 *(int *)data = sc->sc_swflags; 631 break; 632 633 case TIOCSFLAGS: 634 error = suser(p->p_ucred, &p->p_acflag); 635 if (error) 636 break; 637 sc->sc_swflags = *(int *)data; 638 break; 639 640 case TIOCMSET: 641 case TIOCMBIS: 642 case TIOCMBIC: 643 tiocm_to_ucom(sc, cmd, *(int *)data); 644 break; 645 646 case TIOCMGET: 647 *(int *)data = ucom_to_tiocm(sc); 648 break; 649 650 default: 651 error = ENOTTY; 652 break; 653 } 654 655 splx(s); 656 657 return (error); 658 } 659 660 Static void 661 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 662 { 663 u_char combits; 664 665 combits = 0; 666 if (ISSET(ttybits, TIOCM_DTR)) 667 SET(combits, UMCR_DTR); 668 if (ISSET(ttybits, TIOCM_RTS)) 669 SET(combits, UMCR_RTS); 670 671 switch (how) { 672 case TIOCMBIC: 673 CLR(sc->sc_mcr, combits); 674 break; 675 676 case TIOCMBIS: 677 SET(sc->sc_mcr, combits); 678 break; 679 680 case TIOCMSET: 681 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 682 SET(sc->sc_mcr, combits); 683 break; 684 } 685 686 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 687 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 688 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 689 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 690 } 691 692 Static int 693 ucom_to_tiocm(struct ucom_softc *sc) 694 { 695 u_char combits; 696 int ttybits = 0; 697 698 combits = sc->sc_mcr; 699 if (ISSET(combits, UMCR_DTR)) 700 SET(ttybits, TIOCM_DTR); 701 if (ISSET(combits, UMCR_RTS)) 702 SET(ttybits, TIOCM_RTS); 703 704 combits = sc->sc_msr; 705 if (ISSET(combits, UMSR_DCD)) 706 SET(ttybits, TIOCM_CD); 707 if (ISSET(combits, UMSR_CTS)) 708 SET(ttybits, TIOCM_CTS); 709 if (ISSET(combits, UMSR_DSR)) 710 SET(ttybits, TIOCM_DSR); 711 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 712 SET(ttybits, TIOCM_RI); 713 714 #if 0 715 XXX; 716 if (sc->sc_ier != 0) 717 SET(ttybits, TIOCM_LE); 718 #endif 719 720 return (ttybits); 721 } 722 723 Static void 724 ucom_break(sc, onoff) 725 struct ucom_softc *sc; 726 int onoff; 727 { 728 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 729 730 if (sc->sc_methods->ucom_set != NULL) 731 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 732 UCOM_SET_BREAK, onoff); 733 } 734 735 Static void 736 ucom_dtr(struct ucom_softc *sc, int onoff) 737 { 738 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 739 740 if (sc->sc_methods->ucom_set != NULL) 741 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 742 UCOM_SET_DTR, onoff); 743 } 744 745 Static void 746 ucom_rts(struct ucom_softc *sc, int onoff) 747 { 748 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 749 750 if (sc->sc_methods->ucom_set != NULL) 751 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 752 UCOM_SET_RTS, onoff); 753 } 754 755 void 756 ucom_status_change(struct ucom_softc *sc) 757 { 758 struct tty *tp = sc->sc_tty; 759 u_char old_msr; 760 761 if (sc->sc_methods->ucom_get_status != NULL) { 762 old_msr = sc->sc_msr; 763 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 764 &sc->sc_lsr, &sc->sc_msr); 765 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 766 (*linesw[tp->t_line].l_modem)(tp, 767 ISSET(sc->sc_msr, UMSR_DCD)); 768 } else { 769 sc->sc_lsr = 0; 770 sc->sc_msr = 0; 771 } 772 } 773 774 Static int 775 ucomparam(struct tty *tp, struct termios *t) 776 { 777 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 778 int error; 779 780 if (sc->sc_dying) 781 return (EIO); 782 783 /* Check requested parameters. */ 784 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 785 return (EINVAL); 786 787 /* 788 * For the console, always force CLOCAL and !HUPCL, so that the port 789 * is always active. 790 */ 791 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 792 SET(t->c_cflag, CLOCAL); 793 CLR(t->c_cflag, HUPCL); 794 } 795 796 /* 797 * If there were no changes, don't do anything. This avoids dropping 798 * input and improves performance when all we did was frob things like 799 * VMIN and VTIME. 800 */ 801 if (tp->t_ospeed == t->c_ospeed && 802 tp->t_cflag == t->c_cflag) 803 return (0); 804 805 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 806 807 /* And copy to tty. */ 808 tp->t_ispeed = 0; 809 tp->t_ospeed = t->c_ospeed; 810 tp->t_cflag = t->c_cflag; 811 812 if (sc->sc_methods->ucom_param != NULL) { 813 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 814 t); 815 if (error) 816 return (error); 817 } 818 819 /* XXX worry about CHWFLOW */ 820 821 /* 822 * Update the tty layer's idea of the carrier bit, in case we changed 823 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 824 * explicit request. 825 */ 826 DPRINTF(("ucomparam: l_modem\n")); 827 (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); 828 829 #if 0 830 XXX what if the hardware is not open 831 if (!ISSET(t->c_cflag, CHWFLOW)) { 832 if (sc->sc_tx_stopped) { 833 sc->sc_tx_stopped = 0; 834 ucomstart(tp); 835 } 836 } 837 #endif 838 839 return (0); 840 } 841 842 /* 843 * (un)block input via hw flowcontrol 844 */ 845 Static void 846 ucom_hwiflow(struct ucom_softc *sc) 847 { 848 DPRINTF(("ucom_hwiflow:\n")); 849 #if 0 850 XXX 851 bus_space_tag_t iot = sc->sc_iot; 852 bus_space_handle_t ioh = sc->sc_ioh; 853 854 if (sc->sc_mcr_rts == 0) 855 return; 856 857 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 858 CLR(sc->sc_mcr, sc->sc_mcr_rts); 859 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 860 } else { 861 SET(sc->sc_mcr, sc->sc_mcr_rts); 862 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 863 } 864 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 865 #endif 866 } 867 868 Static void 869 ucomstart(struct tty *tp) 870 { 871 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 872 usbd_status err; 873 int s; 874 u_char *data; 875 int cnt; 876 877 if (sc->sc_dying) 878 return; 879 880 s = spltty(); 881 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 882 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 883 goto out; 884 } 885 if (sc->sc_tx_stopped) 886 goto out; 887 888 if (tp->t_outq.c_cc <= tp->t_lowat) { 889 if (ISSET(tp->t_state, TS_ASLEEP)) { 890 CLR(tp->t_state, TS_ASLEEP); 891 wakeup(&tp->t_outq); 892 } 893 selwakeup(&tp->t_wsel); 894 if (tp->t_outq.c_cc == 0) 895 goto out; 896 } 897 898 /* Grab the first contiguous region of buffer space. */ 899 data = tp->t_outq.c_cf; 900 cnt = ndqb(&tp->t_outq, 0); 901 902 if (cnt == 0) { 903 DPRINTF(("ucomstart: cnt==0\n")); 904 goto out; 905 } 906 907 SET(tp->t_state, TS_BUSY); 908 909 if (cnt > sc->sc_obufsize) { 910 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 911 cnt = sc->sc_obufsize; 912 } 913 if (sc->sc_methods->ucom_write != NULL) 914 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 915 sc->sc_obuf, data, &cnt); 916 else 917 memcpy(sc->sc_obuf, data, cnt); 918 919 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 920 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 921 (usbd_private_handle)sc, sc->sc_obuf, cnt, 922 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 923 /* What can we do on error? */ 924 err = usbd_transfer(sc->sc_oxfer); 925 #ifdef DIAGNOSTIC 926 if (err != USBD_IN_PROGRESS) 927 printf("ucomstart: err=%s\n", usbd_errstr(err)); 928 #endif 929 930 out: 931 splx(s); 932 } 933 934 #if defined(__NetBSD__) 935 void 936 #else 937 int 938 #endif 939 ucomstop(struct tty *tp, int flag) 940 { 941 DPRINTF(("ucomstop: flag=%d\n", flag)); 942 #if 0 943 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 944 int s; 945 946 s = spltty(); 947 if (ISSET(tp->t_state, TS_BUSY)) { 948 DPRINTF(("ucomstop: XXX\n")); 949 /* sc->sc_tx_stopped = 1; */ 950 if (!ISSET(tp->t_state, TS_TTSTOP)) 951 SET(tp->t_state, TS_FLUSH); 952 } 953 splx(s); 954 #endif 955 #if !defined(__NetBSD__) 956 return (0); 957 #endif 958 } 959 960 Static void 961 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 962 { 963 struct ucom_softc *sc = (struct ucom_softc *)p; 964 struct tty *tp = sc->sc_tty; 965 u_int32_t cc; 966 int s; 967 968 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 969 970 if (status == USBD_CANCELLED || sc->sc_dying) 971 return; 972 973 if (status) { 974 DPRINTF(("ucomwritecb: status=%d\n", status)); 975 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 976 /* XXX we should restart after some delay. */ 977 return; 978 } 979 980 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 981 #if defined(__NetBSD__) && NRND > 0 982 rnd_add_uint32(&sc->sc_rndsource, cc); 983 #endif 984 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 985 /* convert from USB bytes to tty bytes */ 986 cc -= sc->sc_opkthdrlen; 987 988 s = spltty(); 989 CLR(tp->t_state, TS_BUSY); 990 if (ISSET(tp->t_state, TS_FLUSH)) 991 CLR(tp->t_state, TS_FLUSH); 992 else 993 ndflush(&tp->t_outq, cc); 994 (*linesw[tp->t_line].l_start)(tp); 995 splx(s); 996 } 997 998 Static usbd_status 999 ucomstartread(struct ucom_softc *sc) 1000 { 1001 usbd_status err; 1002 1003 DPRINTFN(5,("ucomstartread: start\n")); 1004 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1005 (usbd_private_handle)sc, 1006 sc->sc_ibuf, sc->sc_ibufsize, 1007 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1008 USBD_NO_TIMEOUT, ucomreadcb); 1009 err = usbd_transfer(sc->sc_ixfer); 1010 if (err != USBD_IN_PROGRESS) { 1011 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1012 return (err); 1013 } 1014 return (USBD_NORMAL_COMPLETION); 1015 } 1016 1017 Static void 1018 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1019 { 1020 struct ucom_softc *sc = (struct ucom_softc *)p; 1021 struct tty *tp = sc->sc_tty; 1022 int (*rint)(int c, struct tty *tp) = linesw[tp->t_line].l_rint; 1023 usbd_status err; 1024 u_int32_t cc; 1025 u_char *cp; 1026 int s; 1027 1028 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1029 1030 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1031 sc->sc_dying) { 1032 DPRINTF(("ucomreadcb: dying\n")); 1033 /* Send something to wake upper layer */ 1034 s = spltty(); 1035 (*rint)('\n', tp); 1036 ttwakeup(tp); 1037 splx(s); 1038 return; 1039 } 1040 1041 if (status) { 1042 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1043 /* XXX we should restart after some delay. */ 1044 return; 1045 } 1046 1047 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 1048 #if defined(__NetBSD__) && NRND > 0 1049 rnd_add_uint32(&sc->sc_rndsource, cc); 1050 #endif 1051 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1052 if (sc->sc_methods->ucom_read != NULL) 1053 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1054 &cp, &cc); 1055 1056 s = spltty(); 1057 /* Give characters to tty layer. */ 1058 while (cc-- > 0) { 1059 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1060 if ((*rint)(*cp++, tp) == -1) { 1061 /* XXX what should we do? */ 1062 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1063 cc); 1064 break; 1065 } 1066 } 1067 splx(s); 1068 1069 err = ucomstartread(sc); 1070 if (err) { 1071 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1072 /* XXX what should we dow now? */ 1073 } 1074 } 1075 1076 Static void 1077 ucom_cleanup(struct ucom_softc *sc) 1078 { 1079 DPRINTF(("ucom_cleanup: closing pipes\n")); 1080 1081 ucom_shutdown(sc); 1082 if (sc->sc_bulkin_pipe != NULL) { 1083 usbd_abort_pipe(sc->sc_bulkin_pipe); 1084 usbd_close_pipe(sc->sc_bulkin_pipe); 1085 sc->sc_bulkin_pipe = NULL; 1086 } 1087 if (sc->sc_bulkout_pipe != NULL) { 1088 usbd_abort_pipe(sc->sc_bulkout_pipe); 1089 usbd_close_pipe(sc->sc_bulkout_pipe); 1090 sc->sc_bulkout_pipe = NULL; 1091 } 1092 if (sc->sc_ixfer != NULL) { 1093 usbd_free_xfer(sc->sc_ixfer); 1094 sc->sc_ixfer = NULL; 1095 } 1096 if (sc->sc_oxfer != NULL) { 1097 usbd_free_xfer(sc->sc_oxfer); 1098 sc->sc_oxfer = NULL; 1099 } 1100 } 1101 1102 #endif /* NUCOM > 0 */ 1103 1104 int 1105 ucomprint(void *aux, const char *pnp) 1106 { 1107 struct ucom_attach_args *uca = aux; 1108 1109 if (pnp) 1110 printf("ucom at %s", pnp); 1111 if (uca->portno != UCOM_UNK_PORTNO) 1112 printf(" portno %d", uca->portno); 1113 return (UNCONF); 1114 } 1115 1116 int 1117 #if defined(__OpenBSD__) 1118 ucomsubmatch(struct device *parent, void *match, void *aux) 1119 #else 1120 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1121 #endif 1122 { 1123 struct ucom_attach_args *uca = aux; 1124 #if defined(__OpenBSD__) 1125 struct cfdata *cf = match; 1126 #endif 1127 1128 if (uca->portno != UCOM_UNK_PORTNO && 1129 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1130 cf->ucomcf_portno != uca->portno) 1131 return (0); 1132 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1133 } 1134