ucom.c revision 1.19
1 /* $NetBSD: ucom.c,v 1.19 2000/04/06 13:32:28 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 (augustss (at) carlstedt.se) 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 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/ioctl.h> 44 #include <sys/conf.h> 45 #include <sys/tty.h> 46 #include <sys/file.h> 47 #include <sys/select.h> 48 #include <sys/proc.h> 49 #include <sys/vnode.h> 50 #include <sys/device.h> 51 #include <sys/poll.h> 52 53 #include <dev/usb/usb.h> 54 55 #include <dev/usb/usbdi.h> 56 #include <dev/usb/usbdi_util.h> 57 #include <dev/usb/usbdevs.h> 58 #include <dev/usb/usb_quirks.h> 59 60 #include <dev/usb/ucomvar.h> 61 62 #include "ucom.h" 63 64 #if NUCOM > 0 65 66 #ifdef UCOM_DEBUG 67 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 68 int ucomdebug = 0; 69 #else 70 #define DPRINTFN(n, x) 71 #endif 72 #define DPRINTF(x) DPRINTFN(0, x) 73 74 #define UCOMUNIT_MASK 0x3ffff 75 #define UCOMDIALOUT_MASK 0x80000 76 #define UCOMCALLUNIT_MASK 0x40000 77 78 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 79 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 80 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 81 82 struct ucom_softc { 83 USBBASEDEVICE sc_dev; /* base device */ 84 85 usbd_device_handle sc_udev; /* USB device */ 86 87 usbd_interface_handle sc_iface; /* data interface */ 88 89 int sc_bulkin_no; /* bulk in endpoint address */ 90 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 91 usbd_xfer_handle sc_ixfer; /* read request */ 92 u_char *sc_ibuf; /* read buffer */ 93 u_int sc_ibufsize; /* read buffer size */ 94 95 int sc_bulkout_no; /* bulk out endpoint address */ 96 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 97 usbd_xfer_handle sc_oxfer; /* write request */ 98 u_char *sc_obuf; /* write buffer */ 99 u_int sc_obufsize; /* write buffer size */ 100 101 struct ucom_methods *sc_methods; 102 void *sc_parent; 103 int sc_portno; 104 105 struct tty *sc_tty; /* our tty */ 106 u_char sc_lsr; 107 u_char sc_msr; 108 u_char sc_mcr; 109 u_char sc_tx_stopped; 110 int sc_swflags; 111 112 u_char sc_opening; /* lock during open */ 113 int sc_refcnt; 114 u_char sc_dying; /* disconnecting */ 115 }; 116 117 cdev_decl(ucom); 118 119 Static void ucom_cleanup __P((struct ucom_softc *)); 120 Static void ucom_hwiflow __P((struct ucom_softc *)); 121 Static int ucomparam __P((struct tty *, struct termios *)); 122 Static void ucomstart __P((struct tty *)); 123 Static void ucom_shutdown __P((struct ucom_softc *)); 124 Static int ucom_do_ioctl __P((struct ucom_softc *, u_long, caddr_t, 125 int, struct proc *)); 126 Static void ucom_dtr __P((struct ucom_softc *, int)); 127 Static void ucom_rts __P((struct ucom_softc *, int)); 128 Static void ucom_break __P((struct ucom_softc *, int)); 129 Static usbd_status ucomstartread __P((struct ucom_softc *)); 130 Static void ucomreadcb __P((usbd_xfer_handle, usbd_private_handle, 131 usbd_status status)); 132 Static void ucomwritecb __P((usbd_xfer_handle, usbd_private_handle, 133 usbd_status status)); 134 Static void tiocm_to_ucom __P((struct ucom_softc *, int, int)); 135 Static int ucom_to_tiocm __P((struct ucom_softc *)); 136 137 USB_DECLARE_DRIVER(ucom); 138 139 USB_MATCH(ucom) 140 { 141 return (1); 142 } 143 144 USB_ATTACH(ucom) 145 { 146 struct ucom_softc *sc = (struct ucom_softc *)self; 147 struct ucom_attach_args *uca = aux; 148 struct tty *tp; 149 150 if (uca->portno != UCOM_UNK_PORTNO) 151 printf(": portno %d", uca->portno); 152 printf("\n"); 153 154 sc->sc_udev = uca->device; 155 sc->sc_iface = uca->iface; 156 sc->sc_bulkout_no = uca->bulkout; 157 sc->sc_bulkin_no = uca->bulkin; 158 sc->sc_ibufsize = uca->ibufsize; 159 sc->sc_obufsize = uca->obufsize; 160 sc->sc_methods = uca->methods; 161 sc->sc_parent = uca->arg; 162 sc->sc_portno = uca->portno; 163 164 tp = ttymalloc(); 165 tp->t_oproc = ucomstart; 166 tp->t_param = ucomparam; 167 sc->sc_tty = tp; 168 169 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 170 tty_attach(tp); 171 172 USB_ATTACH_SUCCESS_RETURN; 173 } 174 175 USB_DETACH(ucom) 176 { 177 struct ucom_softc *sc = (struct ucom_softc *)self; 178 int maj, mn; 179 int s; 180 181 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p\n", 182 sc, flags, sc->sc_tty)); 183 184 sc->sc_dying = 1; 185 186 #ifdef DIAGNOSTIC 187 if (sc->sc_tty == NULL) { 188 DPRINTF(("ucom_detach: no tty\n")); 189 return (0); 190 } 191 #endif 192 193 s = splusb(); 194 if (--sc->sc_refcnt >= 0) { 195 /* Wake everyone.. how? */ 196 /* Wait for processes to go away. */ 197 usb_detach_wait(USBDEV(sc->sc_dev)); 198 } 199 splx(s); 200 201 /* locate the major number */ 202 for (maj = 0; maj < nchrdev; maj++) 203 if (cdevsw[maj].d_open == ucomopen) 204 break; 205 206 /* Nuke the vnodes for any open instances. */ 207 mn = self->dv_unit; 208 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 209 vdevgone(maj, mn, mn, VCHR); 210 vdevgone(maj, mn, mn | UCOMDIALOUT_MASK, VCHR); 211 vdevgone(maj, mn, mn | UCOMCALLUNIT_MASK, VCHR); 212 213 /* Detach and free the tty. */ 214 tty_detach(sc->sc_tty); 215 ttyfree(sc->sc_tty); 216 sc->sc_tty = 0; 217 218 return (0); 219 } 220 221 #if defined(__NetBSD__) || defined(__OpenBSD__) 222 int 223 ucom_activate(self, act) 224 device_ptr_t self; 225 enum devact act; 226 { 227 struct ucom_softc *sc = (struct ucom_softc *)self; 228 229 switch (act) { 230 case DVACT_ACTIVATE: 231 return (EOPNOTSUPP); 232 break; 233 234 case DVACT_DEACTIVATE: 235 sc->sc_dying = 1; 236 break; 237 } 238 return (0); 239 } 240 #endif 241 242 void 243 ucom_shutdown(sc) 244 struct ucom_softc *sc; 245 { 246 struct tty *tp = sc->sc_tty; 247 248 DPRINTF(("ucom_shutdown\n")); 249 /* 250 * Hang up if necessary. Wait a bit, so the other side has time to 251 * notice even if we immediately open the port again. 252 */ 253 if (ISSET(tp->t_cflag, HUPCL)) { 254 ucom_dtr(sc, 0); 255 (void)tsleep(sc, TTIPRI, ttclos, hz); 256 } 257 } 258 259 int 260 ucomopen(dev, flag, mode, p) 261 dev_t dev; 262 int flag, mode; 263 struct proc *p; 264 { 265 int unit = UCOMUNIT(dev); 266 usbd_status err; 267 struct ucom_softc *sc; 268 struct tty *tp; 269 int s; 270 int error; 271 272 if (unit >= ucom_cd.cd_ndevs) 273 return (ENXIO); 274 sc = ucom_cd.cd_devs[unit]; 275 if (sc == NULL) 276 return (ENXIO); 277 278 if (sc->sc_dying) 279 return (EIO); 280 281 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 282 return (ENXIO); 283 284 tp = sc->sc_tty; 285 286 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 287 288 if (ISSET(tp->t_state, TS_ISOPEN) && 289 ISSET(tp->t_state, TS_XCLUDE) && 290 p->p_ucred->cr_uid != 0) 291 return (EBUSY); 292 293 s = spltty(); 294 295 /* 296 * Do the following iff this is a first open. 297 */ 298 while (sc->sc_opening) 299 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 300 301 if (sc->sc_dying) { 302 splx(s); 303 return (EIO); 304 } 305 sc->sc_opening = 1; 306 307 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 308 struct termios t; 309 310 tp->t_dev = dev; 311 312 ucom_status_change(sc); 313 314 /* 315 * Initialize the termios status to the defaults. Add in the 316 * sticky bits from TIOCSFLAGS. 317 */ 318 t.c_ispeed = 0; 319 t.c_ospeed = TTYDEF_SPEED; 320 t.c_cflag = TTYDEF_CFLAG; 321 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 322 SET(t.c_cflag, CLOCAL); 323 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 324 SET(t.c_cflag, CRTSCTS); 325 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 326 SET(t.c_cflag, MDMBUF); 327 /* Make sure ucomparam() will do something. */ 328 tp->t_ospeed = 0; 329 (void) ucomparam(tp, &t); 330 tp->t_iflag = TTYDEF_IFLAG; 331 tp->t_oflag = TTYDEF_OFLAG; 332 tp->t_lflag = TTYDEF_LFLAG; 333 ttychars(tp); 334 ttsetwater(tp); 335 336 /* 337 * Turn on DTR. We must always do this, even if carrier is not 338 * present, because otherwise we'd have to use TIOCSDTR 339 * immediately after setting CLOCAL, which applications do not 340 * expect. We always assert DTR while the device is open 341 * unless explicitly requested to deassert it. 342 */ 343 ucom_dtr(sc, 1); 344 345 // XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 346 ucom_hwiflow(sc); 347 348 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 349 sc->sc_bulkin_no, sc->sc_bulkout_no)); 350 351 /* Open the bulk pipes */ 352 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 353 &sc->sc_bulkin_pipe); 354 if (err) { 355 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 356 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 357 usbd_errstr(err))); 358 return (EIO); 359 } 360 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 361 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 362 if (err) { 363 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 364 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 365 usbd_errstr(err))); 366 usbd_close_pipe(sc->sc_bulkin_pipe); 367 return (EIO); 368 } 369 370 /* Allocate a request and an input buffer and start reading. */ 371 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 372 if (sc->sc_ixfer == NULL) { 373 usbd_close_pipe(sc->sc_bulkin_pipe); 374 usbd_close_pipe(sc->sc_bulkout_pipe); 375 return (ENOMEM); 376 } 377 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, sc->sc_ibufsize); 378 if (sc->sc_ibuf == NULL) { 379 usbd_free_xfer(sc->sc_ixfer); 380 usbd_close_pipe(sc->sc_bulkin_pipe); 381 usbd_close_pipe(sc->sc_bulkout_pipe); 382 return (ENOMEM); 383 } 384 385 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 386 if (sc->sc_oxfer == NULL) { 387 usbd_free_xfer(sc->sc_ixfer); 388 usbd_close_pipe(sc->sc_bulkin_pipe); 389 usbd_close_pipe(sc->sc_bulkout_pipe); 390 return (ENOMEM); 391 } 392 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, sc->sc_obufsize); 393 if (sc->sc_obuf == NULL) { 394 usbd_free_xfer(sc->sc_oxfer); 395 usbd_free_xfer(sc->sc_ixfer); 396 usbd_close_pipe(sc->sc_bulkin_pipe); 397 usbd_close_pipe(sc->sc_bulkout_pipe); 398 return (ENOMEM); 399 } 400 401 if (sc->sc_methods->ucom_open != NULL) 402 sc->sc_methods->ucom_open(sc->sc_parent, sc->sc_portno); 403 404 ucomstartread(sc); 405 } 406 sc->sc_opening = 0; 407 wakeup(&sc->sc_opening); 408 splx(s); 409 410 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 411 if (error) 412 goto bad; 413 414 error = (*linesw[tp->t_line].l_open)(dev, tp); 415 if (error) 416 goto bad; 417 418 return (0); 419 420 bad: 421 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 422 /* 423 * We failed to open the device, and nobody else had it opened. 424 * Clean up the state as appropriate. 425 */ 426 ucom_cleanup(sc); 427 } 428 429 return (error); 430 } 431 432 int 433 ucomclose(dev, flag, mode, p) 434 dev_t dev; 435 int flag, mode; 436 struct proc *p; 437 { 438 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 439 struct tty *tp = sc->sc_tty; 440 441 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 442 if (!ISSET(tp->t_state, TS_ISOPEN)) 443 return (0); 444 445 sc->sc_refcnt++; 446 447 (*linesw[tp->t_line].l_close)(tp, flag); 448 ttyclose(tp); 449 450 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 451 /* 452 * Although we got a last close, the device may still be in 453 * use; e.g. if this was the dialout node, and there are still 454 * processes waiting for carrier on the non-dialout node. 455 */ 456 ucom_cleanup(sc); 457 } 458 459 if (sc->sc_methods->ucom_close != NULL) 460 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 461 462 if (--sc->sc_refcnt < 0) 463 usb_detach_wakeup(USBDEV(sc->sc_dev)); 464 465 return (0); 466 } 467 468 int 469 ucomread(dev, uio, flag) 470 dev_t dev; 471 struct uio *uio; 472 int flag; 473 { 474 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 475 struct tty *tp = sc->sc_tty; 476 int error; 477 478 if (sc->sc_dying) 479 return (EIO); 480 481 sc->sc_refcnt++; 482 error = ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 483 if (--sc->sc_refcnt < 0) 484 usb_detach_wakeup(USBDEV(sc->sc_dev)); 485 return (error); 486 } 487 488 int 489 ucomwrite(dev, uio, flag) 490 dev_t dev; 491 struct uio *uio; 492 int flag; 493 { 494 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 495 struct tty *tp = sc->sc_tty; 496 int error; 497 498 if (sc->sc_dying) 499 return (EIO); 500 501 sc->sc_refcnt++; 502 error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 503 if (--sc->sc_refcnt < 0) 504 usb_detach_wakeup(USBDEV(sc->sc_dev)); 505 return (error); 506 } 507 508 struct tty * 509 ucomtty(dev) 510 dev_t dev; 511 { 512 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 513 struct tty *tp = sc->sc_tty; 514 515 return (tp); 516 } 517 518 int 519 ucomioctl(dev, cmd, data, flag, p) 520 dev_t dev; 521 u_long cmd; 522 caddr_t data; 523 int flag; 524 struct proc *p; 525 { 526 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 527 int error; 528 529 sc->sc_refcnt++; 530 error = ucom_do_ioctl(sc, cmd, data, flag, p); 531 if (--sc->sc_refcnt < 0) 532 usb_detach_wakeup(USBDEV(sc->sc_dev)); 533 return (error); 534 } 535 536 Static int 537 ucom_do_ioctl(sc, cmd, data, flag, p) 538 struct ucom_softc *sc; 539 u_long cmd; 540 caddr_t data; 541 int flag; 542 struct proc *p; 543 { 544 struct tty *tp = sc->sc_tty; 545 int error; 546 int s; 547 548 if (sc->sc_dying) 549 return (EIO); 550 551 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 552 553 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 554 if (error >= 0) 555 return (error); 556 557 error = ttioctl(tp, cmd, data, flag, p); 558 if (error >= 0) 559 return (error); 560 561 if (sc->sc_methods->ucom_ioctl != NULL) { 562 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 563 sc->sc_portno, cmd, data, flag, p); 564 if (error >= 0) 565 return (error); 566 } 567 568 error = 0; 569 570 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 571 s = spltty(); 572 573 switch (cmd) { 574 case TIOCSBRK: 575 ucom_break(sc, 1); 576 break; 577 578 case TIOCCBRK: 579 ucom_break(sc, 0); 580 break; 581 582 case TIOCSDTR: 583 ucom_dtr(sc, 1); 584 break; 585 586 case TIOCCDTR: 587 ucom_dtr(sc, 0); 588 break; 589 590 case TIOCGFLAGS: 591 *(int *)data = sc->sc_swflags; 592 break; 593 594 case TIOCSFLAGS: 595 error = suser(p->p_ucred, &p->p_acflag); 596 if (error) 597 break; 598 sc->sc_swflags = *(int *)data; 599 break; 600 601 case TIOCMSET: 602 case TIOCMBIS: 603 case TIOCMBIC: 604 tiocm_to_ucom(sc, cmd, *(int *)data); 605 break; 606 607 case TIOCMGET: 608 *(int *)data = ucom_to_tiocm(sc); 609 break; 610 611 default: 612 error = ENOTTY; 613 break; 614 } 615 616 splx(s); 617 618 return (error); 619 } 620 621 Static void 622 tiocm_to_ucom(sc, how, ttybits) 623 struct ucom_softc *sc; 624 int how, ttybits; 625 { 626 u_char combits; 627 628 combits = 0; 629 if (ISSET(ttybits, TIOCM_DTR)) 630 SET(combits, UMCR_DTR); 631 if (ISSET(ttybits, TIOCM_RTS)) 632 SET(combits, UMCR_RTS); 633 634 switch (how) { 635 case TIOCMBIC: 636 CLR(sc->sc_mcr, combits); 637 break; 638 639 case TIOCMBIS: 640 SET(sc->sc_mcr, combits); 641 break; 642 643 case TIOCMSET: 644 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 645 SET(sc->sc_mcr, combits); 646 break; 647 } 648 649 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 650 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 651 } 652 653 Static int 654 ucom_to_tiocm(sc) 655 struct ucom_softc *sc; 656 { 657 u_char combits; 658 int ttybits = 0; 659 660 combits = sc->sc_mcr; 661 if (ISSET(combits, UMCR_DTR)) 662 SET(ttybits, TIOCM_DTR); 663 if (ISSET(combits, UMCR_RTS)) 664 SET(ttybits, TIOCM_RTS); 665 666 combits = sc->sc_msr; 667 if (ISSET(combits, UMSR_DCD)) 668 SET(ttybits, TIOCM_CD); 669 if (ISSET(combits, UMSR_CTS)) 670 SET(ttybits, TIOCM_CTS); 671 if (ISSET(combits, UMSR_DSR)) 672 SET(ttybits, TIOCM_DSR); 673 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 674 SET(ttybits, TIOCM_RI); 675 676 #if 0 677 XXX; 678 if (sc->sc_ier != 0) 679 SET(ttybits, TIOCM_LE); 680 #endif 681 682 return (ttybits); 683 } 684 685 Static void 686 ucom_break(sc, onoff) 687 struct ucom_softc *sc; 688 int onoff; 689 { 690 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 691 692 if (sc->sc_methods->ucom_set != NULL) 693 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 694 UCOM_SET_BREAK, onoff); 695 } 696 697 Static void 698 ucom_dtr(sc, onoff) 699 struct ucom_softc *sc; 700 int onoff; 701 { 702 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 703 704 if (sc->sc_methods->ucom_set != NULL) 705 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 706 UCOM_SET_DTR, onoff); 707 } 708 709 Static void 710 ucom_rts(sc, onoff) 711 struct ucom_softc *sc; 712 int onoff; 713 { 714 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 715 716 if (sc->sc_methods->ucom_set != NULL) 717 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 718 UCOM_SET_RTS, onoff); 719 } 720 721 Static void 722 ucom_status_change(sc) 723 struct ucom_softc *sc; 724 { 725 if (sc->sc_methods->ucom_get_status != NULL) { 726 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 727 &sc->sc_lsr, &sc->sc_msr); 728 } else { 729 sc->sc_lsr = 0; 730 sc->sc_msr = 0; 731 } 732 } 733 734 Static int 735 ucomparam(tp, t) 736 struct tty *tp; 737 struct termios *t; 738 { 739 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 740 int error; 741 742 if (sc->sc_dying) 743 return (EIO); 744 745 /* Check requested parameters. */ 746 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 747 return (EINVAL); 748 749 /* 750 * For the console, always force CLOCAL and !HUPCL, so that the port 751 * is always active. 752 */ 753 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 754 SET(t->c_cflag, CLOCAL); 755 CLR(t->c_cflag, HUPCL); 756 } 757 758 /* 759 * If there were no changes, don't do anything. This avoids dropping 760 * input and improves performance when all we did was frob things like 761 * VMIN and VTIME. 762 */ 763 if (tp->t_ospeed == t->c_ospeed && 764 tp->t_cflag == t->c_cflag) 765 return (0); 766 767 //XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 768 769 /* And copy to tty. */ 770 tp->t_ispeed = 0; 771 tp->t_ospeed = t->c_ospeed; 772 tp->t_cflag = t->c_cflag; 773 774 if (sc->sc_methods->ucom_param != NULL) { 775 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 776 t); 777 if (error) 778 return (error); 779 } 780 781 // XXX worry about CHWFLOW 782 783 /* 784 * Update the tty layer's idea of the carrier bit, in case we changed 785 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 786 * explicit request. 787 */ 788 DPRINTF(("ucomparam: l_modem\n")); 789 (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); 790 791 #if 0 792 XXX what if the hardware is not open 793 if (!ISSET(t->c_cflag, CHWFLOW)) { 794 if (sc->sc_tx_stopped) { 795 sc->sc_tx_stopped = 0; 796 ucomstart(tp); 797 } 798 } 799 #endif 800 801 return (0); 802 } 803 804 /* 805 * (un)block input via hw flowcontrol 806 */ 807 Static void 808 ucom_hwiflow(sc) 809 struct ucom_softc *sc; 810 { 811 DPRINTF(("ucom_hwiflow:\n")); 812 #if 0 813 XXX 814 bus_space_tag_t iot = sc->sc_iot; 815 bus_space_handle_t ioh = sc->sc_ioh; 816 817 if (sc->sc_mcr_rts == 0) 818 return; 819 820 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 821 CLR(sc->sc_mcr, sc->sc_mcr_rts); 822 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 823 } else { 824 SET(sc->sc_mcr, sc->sc_mcr_rts); 825 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 826 } 827 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 828 #endif 829 } 830 831 Static void 832 ucomstart(tp) 833 struct tty *tp; 834 { 835 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 836 usbd_status err; 837 int s; 838 u_char *data; 839 int cnt; 840 841 if (sc->sc_dying) 842 return; 843 844 s = spltty(); 845 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 846 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 847 goto out; 848 } 849 if (sc->sc_tx_stopped) 850 goto out; 851 852 if (tp->t_outq.c_cc <= tp->t_lowat) { 853 if (ISSET(tp->t_state, TS_ASLEEP)) { 854 CLR(tp->t_state, TS_ASLEEP); 855 wakeup(&tp->t_outq); 856 } 857 selwakeup(&tp->t_wsel); 858 if (tp->t_outq.c_cc == 0) 859 goto out; 860 } 861 862 /* Grab the first contiguous region of buffer space. */ 863 data = tp->t_outq.c_cf; 864 cnt = ndqb(&tp->t_outq, 0); 865 866 if (cnt == 0) { 867 DPRINTF(("ucomstart: cnt==0\n")); 868 goto out; 869 } 870 871 SET(tp->t_state, TS_BUSY); 872 873 if (cnt > sc->sc_obufsize) { 874 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 875 cnt = sc->sc_obufsize; 876 } 877 memcpy(sc->sc_obuf, data, cnt); 878 879 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 880 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 881 (usbd_private_handle)sc, sc->sc_obuf, cnt, 882 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 883 /* What can we do on error? */ 884 err = usbd_transfer(sc->sc_oxfer); 885 #ifdef DIAGNOSTIC 886 if (err != USBD_IN_PROGRESS) 887 printf("ucomstart: err=%s\n", usbd_errstr(err)); 888 #endif 889 890 out: 891 splx(s); 892 } 893 894 Static void 895 ucomstop(tp, flag) 896 struct tty *tp; 897 int flag; 898 { 899 DPRINTF(("ucomstop: flag=%d\n", flag)); 900 #if 0 901 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 902 int s; 903 904 s = spltty(); 905 if (ISSET(tp->t_state, TS_BUSY)) { 906 DPRINTF(("ucomstop: XXX\n")); 907 /* sc->sc_tx_stopped = 1; */ 908 if (!ISSET(tp->t_state, TS_TTSTOP)) 909 SET(tp->t_state, TS_FLUSH); 910 } 911 splx(s); 912 #endif 913 } 914 915 Static void 916 ucomwritecb(xfer, p, status) 917 usbd_xfer_handle xfer; 918 usbd_private_handle p; 919 usbd_status status; 920 { 921 struct ucom_softc *sc = (struct ucom_softc *)p; 922 struct tty *tp = sc->sc_tty; 923 u_int32_t cc; 924 int s; 925 926 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 927 928 if (status == USBD_CANCELLED) 929 return; 930 931 if (status) { 932 DPRINTF(("ucomwritecb: status=%d\n", status)); 933 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 934 /* XXX we should restart after some delay. */ 935 return; 936 } 937 938 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 939 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 940 941 s = spltty(); 942 CLR(tp->t_state, TS_BUSY); 943 if (ISSET(tp->t_state, TS_FLUSH)) 944 CLR(tp->t_state, TS_FLUSH); 945 else 946 ndflush(&tp->t_outq, cc); 947 (*linesw[tp->t_line].l_start)(tp); 948 splx(s); 949 } 950 951 Static usbd_status 952 ucomstartread(sc) 953 struct ucom_softc *sc; 954 { 955 usbd_status err; 956 957 DPRINTFN(5,("ucomstartread: start\n")); 958 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 959 (usbd_private_handle)sc, 960 sc->sc_ibuf, sc->sc_ibufsize, 961 USBD_SHORT_XFER_OK | USBD_NO_COPY, 962 USBD_NO_TIMEOUT, ucomreadcb); 963 err = usbd_transfer(sc->sc_ixfer); 964 if (err != USBD_IN_PROGRESS) { 965 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 966 return (err); 967 } 968 return (USBD_NORMAL_COMPLETION); 969 } 970 971 Static void 972 ucomreadcb(xfer, p, status) 973 usbd_xfer_handle xfer; 974 usbd_private_handle p; 975 usbd_status status; 976 { 977 struct ucom_softc *sc = (struct ucom_softc *)p; 978 struct tty *tp = sc->sc_tty; 979 int (*rint) __P((int c, struct tty *tp)) = linesw[tp->t_line].l_rint; 980 usbd_status err; 981 u_int32_t cc; 982 u_char *cp; 983 int s; 984 985 if (status == USBD_CANCELLED) 986 return; 987 988 if (status) { 989 DPRINTF(("ucomreadcb: status=%d\n", status)); 990 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 991 /* XXX we should restart after some delay. */ 992 return; 993 } 994 995 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 996 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 997 s = spltty(); 998 /* Give characters to tty layer. */ 999 while (cc-- > 0) { 1000 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1001 if ((*rint)(*cp++, tp) == -1) { 1002 /* XXX what should we do? */ 1003 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1004 cc); 1005 break; 1006 } 1007 } 1008 splx(s); 1009 1010 err = ucomstartread(sc); 1011 if (err) { 1012 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1013 /* XXX what should we dow now? */ 1014 } 1015 } 1016 1017 Static void 1018 ucom_cleanup(sc) 1019 struct ucom_softc *sc; 1020 { 1021 DPRINTF(("ucom_cleanup: closing pipes\n")); 1022 1023 ucom_shutdown(sc); 1024 usbd_abort_pipe(sc->sc_bulkin_pipe); 1025 usbd_close_pipe(sc->sc_bulkin_pipe); 1026 usbd_abort_pipe(sc->sc_bulkout_pipe); 1027 usbd_close_pipe(sc->sc_bulkout_pipe); 1028 usbd_free_xfer(sc->sc_ixfer); 1029 usbd_free_xfer(sc->sc_oxfer); 1030 } 1031 1032 #endif /* NUCOM > 0 */ 1033 1034 Static int 1035 ucomprint(aux, pnp) 1036 void *aux; 1037 const char *pnp; 1038 { 1039 1040 if (pnp) 1041 printf("ucom at %s\n", pnp); 1042 return (UNCONF); 1043 } 1044 1045 Static int 1046 ucomsubmatch(parent, cf, aux) 1047 struct device *parent; 1048 struct cfdata *cf; 1049 void *aux; 1050 { 1051 struct ucom_attach_args *uca = aux; 1052 1053 if (uca->portno != UCOM_UNK_PORTNO && 1054 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1055 cf->ucomcf_portno != uca->portno) 1056 return (0); 1057 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1058 } 1059
Indexes created Mon Oct 20 20:10:13 GMT 2025