ucom.c revision 1.21
1 /* $NetBSD: ucom.c,v 1.21 2000/04/08 01:22:26 itojun 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_status_change __P((struct ucom_softc *)); 129 Static void ucom_break __P((struct ucom_softc *, int)); 130 Static usbd_status ucomstartread __P((struct ucom_softc *)); 131 Static void ucomreadcb __P((usbd_xfer_handle, usbd_private_handle, 132 usbd_status status)); 133 Static void ucomwritecb __P((usbd_xfer_handle, usbd_private_handle, 134 usbd_status status)); 135 Static void tiocm_to_ucom __P((struct ucom_softc *, int, int)); 136 Static int ucom_to_tiocm __P((struct ucom_softc *)); 137 138 USB_DECLARE_DRIVER(ucom); 139 140 USB_MATCH(ucom) 141 { 142 return (1); 143 } 144 145 USB_ATTACH(ucom) 146 { 147 struct ucom_softc *sc = (struct ucom_softc *)self; 148 struct ucom_attach_args *uca = aux; 149 struct tty *tp; 150 151 if (uca->portno != UCOM_UNK_PORTNO) 152 printf(": portno %d", uca->portno); 153 printf("\n"); 154 155 sc->sc_udev = uca->device; 156 sc->sc_iface = uca->iface; 157 sc->sc_bulkout_no = uca->bulkout; 158 sc->sc_bulkin_no = uca->bulkin; 159 sc->sc_ibufsize = uca->ibufsize; 160 sc->sc_obufsize = uca->obufsize; 161 sc->sc_methods = uca->methods; 162 sc->sc_parent = uca->arg; 163 sc->sc_portno = uca->portno; 164 165 tp = ttymalloc(); 166 tp->t_oproc = ucomstart; 167 tp->t_param = ucomparam; 168 sc->sc_tty = tp; 169 170 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 171 tty_attach(tp); 172 173 USB_ATTACH_SUCCESS_RETURN; 174 } 175 176 USB_DETACH(ucom) 177 { 178 struct ucom_softc *sc = (struct ucom_softc *)self; 179 int maj, mn; 180 int s; 181 182 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p\n", 183 sc, flags, sc->sc_tty)); 184 185 sc->sc_dying = 1; 186 187 #ifdef DIAGNOSTIC 188 if (sc->sc_tty == NULL) { 189 DPRINTF(("ucom_detach: no tty\n")); 190 return (0); 191 } 192 #endif 193 194 s = splusb(); 195 if (--sc->sc_refcnt >= 0) { 196 /* Wake everyone.. how? */ 197 /* Wait for processes to go away. */ 198 usb_detach_wait(USBDEV(sc->sc_dev)); 199 } 200 splx(s); 201 202 /* locate the major number */ 203 for (maj = 0; maj < nchrdev; maj++) 204 if (cdevsw[maj].d_open == ucomopen) 205 break; 206 207 /* Nuke the vnodes for any open instances. */ 208 mn = self->dv_unit; 209 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 210 vdevgone(maj, mn, mn, VCHR); 211 vdevgone(maj, mn, mn | UCOMDIALOUT_MASK, VCHR); 212 vdevgone(maj, mn, mn | UCOMCALLUNIT_MASK, VCHR); 213 214 /* Detach and free the tty. */ 215 tty_detach(sc->sc_tty); 216 ttyfree(sc->sc_tty); 217 sc->sc_tty = 0; 218 219 return (0); 220 } 221 222 #if defined(__NetBSD__) || defined(__OpenBSD__) 223 int 224 ucom_activate(self, act) 225 device_ptr_t self; 226 enum devact act; 227 { 228 struct ucom_softc *sc = (struct ucom_softc *)self; 229 230 switch (act) { 231 case DVACT_ACTIVATE: 232 return (EOPNOTSUPP); 233 break; 234 235 case DVACT_DEACTIVATE: 236 sc->sc_dying = 1; 237 break; 238 } 239 return (0); 240 } 241 #endif 242 243 void 244 ucom_shutdown(sc) 245 struct ucom_softc *sc; 246 { 247 struct tty *tp = sc->sc_tty; 248 249 DPRINTF(("ucom_shutdown\n")); 250 /* 251 * Hang up if necessary. Wait a bit, so the other side has time to 252 * notice even if we immediately open the port again. 253 */ 254 if (ISSET(tp->t_cflag, HUPCL)) { 255 ucom_dtr(sc, 0); 256 (void)tsleep(sc, TTIPRI, ttclos, hz); 257 } 258 } 259 260 int 261 ucomopen(dev, flag, mode, p) 262 dev_t dev; 263 int flag, mode; 264 struct proc *p; 265 { 266 int unit = UCOMUNIT(dev); 267 usbd_status err; 268 struct ucom_softc *sc; 269 struct tty *tp; 270 int s; 271 int error; 272 273 if (unit >= ucom_cd.cd_ndevs) 274 return (ENXIO); 275 sc = ucom_cd.cd_devs[unit]; 276 if (sc == NULL) 277 return (ENXIO); 278 279 if (sc->sc_dying) 280 return (EIO); 281 282 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 283 return (ENXIO); 284 285 tp = sc->sc_tty; 286 287 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 288 289 if (ISSET(tp->t_state, TS_ISOPEN) && 290 ISSET(tp->t_state, TS_XCLUDE) && 291 p->p_ucred->cr_uid != 0) 292 return (EBUSY); 293 294 s = spltty(); 295 296 /* 297 * Do the following iff this is a first open. 298 */ 299 while (sc->sc_opening) 300 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 301 302 if (sc->sc_dying) { 303 splx(s); 304 return (EIO); 305 } 306 sc->sc_opening = 1; 307 308 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 309 struct termios t; 310 311 tp->t_dev = dev; 312 313 ucom_status_change(sc); 314 315 /* 316 * Initialize the termios status to the defaults. Add in the 317 * sticky bits from TIOCSFLAGS. 318 */ 319 t.c_ispeed = 0; 320 t.c_ospeed = TTYDEF_SPEED; 321 t.c_cflag = TTYDEF_CFLAG; 322 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 323 SET(t.c_cflag, CLOCAL); 324 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 325 SET(t.c_cflag, CRTSCTS); 326 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 327 SET(t.c_cflag, MDMBUF); 328 /* Make sure ucomparam() will do something. */ 329 tp->t_ospeed = 0; 330 (void) ucomparam(tp, &t); 331 tp->t_iflag = TTYDEF_IFLAG; 332 tp->t_oflag = TTYDEF_OFLAG; 333 tp->t_lflag = TTYDEF_LFLAG; 334 ttychars(tp); 335 ttsetwater(tp); 336 337 /* 338 * Turn on DTR. We must always do this, even if carrier is not 339 * present, because otherwise we'd have to use TIOCSDTR 340 * immediately after setting CLOCAL, which applications do not 341 * expect. We always assert DTR while the device is open 342 * unless explicitly requested to deassert it. 343 */ 344 ucom_dtr(sc, 1); 345 346 // XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 347 ucom_hwiflow(sc); 348 349 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 350 sc->sc_bulkin_no, sc->sc_bulkout_no)); 351 352 /* Open the bulk pipes */ 353 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 354 &sc->sc_bulkin_pipe); 355 if (err) { 356 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 357 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 358 usbd_errstr(err))); 359 return (EIO); 360 } 361 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 362 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 363 if (err) { 364 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 365 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 366 usbd_errstr(err))); 367 usbd_close_pipe(sc->sc_bulkin_pipe); 368 return (EIO); 369 } 370 371 /* Allocate a request and an input buffer and start reading. */ 372 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 373 if (sc->sc_ixfer == NULL) { 374 usbd_close_pipe(sc->sc_bulkin_pipe); 375 usbd_close_pipe(sc->sc_bulkout_pipe); 376 return (ENOMEM); 377 } 378 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, sc->sc_ibufsize); 379 if (sc->sc_ibuf == NULL) { 380 usbd_free_xfer(sc->sc_ixfer); 381 usbd_close_pipe(sc->sc_bulkin_pipe); 382 usbd_close_pipe(sc->sc_bulkout_pipe); 383 return (ENOMEM); 384 } 385 386 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 387 if (sc->sc_oxfer == NULL) { 388 usbd_free_xfer(sc->sc_ixfer); 389 usbd_close_pipe(sc->sc_bulkin_pipe); 390 usbd_close_pipe(sc->sc_bulkout_pipe); 391 return (ENOMEM); 392 } 393 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, sc->sc_obufsize); 394 if (sc->sc_obuf == NULL) { 395 usbd_free_xfer(sc->sc_oxfer); 396 usbd_free_xfer(sc->sc_ixfer); 397 usbd_close_pipe(sc->sc_bulkin_pipe); 398 usbd_close_pipe(sc->sc_bulkout_pipe); 399 return (ENOMEM); 400 } 401 402 if (sc->sc_methods->ucom_open != NULL) 403 sc->sc_methods->ucom_open(sc->sc_parent, sc->sc_portno); 404 405 ucomstartread(sc); 406 } 407 sc->sc_opening = 0; 408 wakeup(&sc->sc_opening); 409 splx(s); 410 411 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 412 if (error) 413 goto bad; 414 415 error = (*linesw[tp->t_line].l_open)(dev, tp); 416 if (error) 417 goto bad; 418 419 return (0); 420 421 bad: 422 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 423 /* 424 * We failed to open the device, and nobody else had it opened. 425 * Clean up the state as appropriate. 426 */ 427 ucom_cleanup(sc); 428 } 429 430 return (error); 431 } 432 433 int 434 ucomclose(dev, flag, mode, p) 435 dev_t dev; 436 int flag, mode; 437 struct proc *p; 438 { 439 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 440 struct tty *tp = sc->sc_tty; 441 442 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 443 if (!ISSET(tp->t_state, TS_ISOPEN)) 444 return (0); 445 446 sc->sc_refcnt++; 447 448 (*linesw[tp->t_line].l_close)(tp, flag); 449 ttyclose(tp); 450 451 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 452 /* 453 * Although we got a last close, the device may still be in 454 * use; e.g. if this was the dialout node, and there are still 455 * processes waiting for carrier on the non-dialout node. 456 */ 457 ucom_cleanup(sc); 458 } 459 460 if (sc->sc_methods->ucom_close != NULL) 461 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 462 463 if (--sc->sc_refcnt < 0) 464 usb_detach_wakeup(USBDEV(sc->sc_dev)); 465 466 return (0); 467 } 468 469 int 470 ucomread(dev, uio, flag) 471 dev_t dev; 472 struct uio *uio; 473 int flag; 474 { 475 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 476 struct tty *tp = sc->sc_tty; 477 int error; 478 479 if (sc->sc_dying) 480 return (EIO); 481 482 sc->sc_refcnt++; 483 error = ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 484 if (--sc->sc_refcnt < 0) 485 usb_detach_wakeup(USBDEV(sc->sc_dev)); 486 return (error); 487 } 488 489 int 490 ucomwrite(dev, uio, flag) 491 dev_t dev; 492 struct uio *uio; 493 int flag; 494 { 495 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 496 struct tty *tp = sc->sc_tty; 497 int error; 498 499 if (sc->sc_dying) 500 return (EIO); 501 502 sc->sc_refcnt++; 503 error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 504 if (--sc->sc_refcnt < 0) 505 usb_detach_wakeup(USBDEV(sc->sc_dev)); 506 return (error); 507 } 508 509 struct tty * 510 ucomtty(dev) 511 dev_t dev; 512 { 513 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 514 struct tty *tp = sc->sc_tty; 515 516 return (tp); 517 } 518 519 int 520 ucomioctl(dev, cmd, data, flag, p) 521 dev_t dev; 522 u_long cmd; 523 caddr_t data; 524 int flag; 525 struct proc *p; 526 { 527 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 528 int error; 529 530 sc->sc_refcnt++; 531 error = ucom_do_ioctl(sc, cmd, data, flag, p); 532 if (--sc->sc_refcnt < 0) 533 usb_detach_wakeup(USBDEV(sc->sc_dev)); 534 return (error); 535 } 536 537 Static int 538 ucom_do_ioctl(sc, cmd, data, flag, p) 539 struct ucom_softc *sc; 540 u_long cmd; 541 caddr_t data; 542 int flag; 543 struct proc *p; 544 { 545 struct tty *tp = sc->sc_tty; 546 int error; 547 int s; 548 549 if (sc->sc_dying) 550 return (EIO); 551 552 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 553 554 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 555 if (error >= 0) 556 return (error); 557 558 error = ttioctl(tp, cmd, data, flag, p); 559 if (error >= 0) 560 return (error); 561 562 if (sc->sc_methods->ucom_ioctl != NULL) { 563 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 564 sc->sc_portno, cmd, data, flag, p); 565 if (error >= 0) 566 return (error); 567 } 568 569 error = 0; 570 571 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 572 s = spltty(); 573 574 switch (cmd) { 575 case TIOCSBRK: 576 ucom_break(sc, 1); 577 break; 578 579 case TIOCCBRK: 580 ucom_break(sc, 0); 581 break; 582 583 case TIOCSDTR: 584 ucom_dtr(sc, 1); 585 break; 586 587 case TIOCCDTR: 588 ucom_dtr(sc, 0); 589 break; 590 591 case TIOCGFLAGS: 592 *(int *)data = sc->sc_swflags; 593 break; 594 595 case TIOCSFLAGS: 596 error = suser(p->p_ucred, &p->p_acflag); 597 if (error) 598 break; 599 sc->sc_swflags = *(int *)data; 600 break; 601 602 case TIOCMSET: 603 case TIOCMBIS: 604 case TIOCMBIC: 605 tiocm_to_ucom(sc, cmd, *(int *)data); 606 break; 607 608 case TIOCMGET: 609 *(int *)data = ucom_to_tiocm(sc); 610 break; 611 612 default: 613 error = ENOTTY; 614 break; 615 } 616 617 splx(s); 618 619 return (error); 620 } 621 622 Static void 623 tiocm_to_ucom(sc, how, ttybits) 624 struct ucom_softc *sc; 625 int how, ttybits; 626 { 627 u_char combits; 628 629 combits = 0; 630 if (ISSET(ttybits, TIOCM_DTR)) 631 SET(combits, UMCR_DTR); 632 if (ISSET(ttybits, TIOCM_RTS)) 633 SET(combits, UMCR_RTS); 634 635 switch (how) { 636 case TIOCMBIC: 637 CLR(sc->sc_mcr, combits); 638 break; 639 640 case TIOCMBIS: 641 SET(sc->sc_mcr, combits); 642 break; 643 644 case TIOCMSET: 645 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 646 SET(sc->sc_mcr, combits); 647 break; 648 } 649 650 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 651 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 652 } 653 654 Static int 655 ucom_to_tiocm(sc) 656 struct ucom_softc *sc; 657 { 658 u_char combits; 659 int ttybits = 0; 660 661 combits = sc->sc_mcr; 662 if (ISSET(combits, UMCR_DTR)) 663 SET(ttybits, TIOCM_DTR); 664 if (ISSET(combits, UMCR_RTS)) 665 SET(ttybits, TIOCM_RTS); 666 667 combits = sc->sc_msr; 668 if (ISSET(combits, UMSR_DCD)) 669 SET(ttybits, TIOCM_CD); 670 if (ISSET(combits, UMSR_CTS)) 671 SET(ttybits, TIOCM_CTS); 672 if (ISSET(combits, UMSR_DSR)) 673 SET(ttybits, TIOCM_DSR); 674 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 675 SET(ttybits, TIOCM_RI); 676 677 #if 0 678 XXX; 679 if (sc->sc_ier != 0) 680 SET(ttybits, TIOCM_LE); 681 #endif 682 683 return (ttybits); 684 } 685 686 Static void 687 ucom_break(sc, onoff) 688 struct ucom_softc *sc; 689 int onoff; 690 { 691 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 692 693 if (sc->sc_methods->ucom_set != NULL) 694 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 695 UCOM_SET_BREAK, onoff); 696 } 697 698 Static void 699 ucom_dtr(sc, onoff) 700 struct ucom_softc *sc; 701 int onoff; 702 { 703 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 704 705 if (sc->sc_methods->ucom_set != NULL) 706 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 707 UCOM_SET_DTR, onoff); 708 } 709 710 Static void 711 ucom_rts(sc, onoff) 712 struct ucom_softc *sc; 713 int onoff; 714 { 715 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 716 717 if (sc->sc_methods->ucom_set != NULL) 718 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 719 UCOM_SET_RTS, onoff); 720 } 721 722 Static void 723 ucom_status_change(sc) 724 struct ucom_softc *sc; 725 { 726 if (sc->sc_methods->ucom_get_status != NULL) { 727 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 728 &sc->sc_lsr, &sc->sc_msr); 729 } else { 730 sc->sc_lsr = 0; 731 sc->sc_msr = 0; 732 } 733 } 734 735 Static int 736 ucomparam(tp, t) 737 struct tty *tp; 738 struct termios *t; 739 { 740 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 741 int error; 742 743 if (sc->sc_dying) 744 return (EIO); 745 746 /* Check requested parameters. */ 747 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 748 return (EINVAL); 749 750 /* 751 * For the console, always force CLOCAL and !HUPCL, so that the port 752 * is always active. 753 */ 754 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 755 SET(t->c_cflag, CLOCAL); 756 CLR(t->c_cflag, HUPCL); 757 } 758 759 /* 760 * If there were no changes, don't do anything. This avoids dropping 761 * input and improves performance when all we did was frob things like 762 * VMIN and VTIME. 763 */ 764 if (tp->t_ospeed == t->c_ospeed && 765 tp->t_cflag == t->c_cflag) 766 return (0); 767 768 //XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 769 770 /* And copy to tty. */ 771 tp->t_ispeed = 0; 772 tp->t_ospeed = t->c_ospeed; 773 tp->t_cflag = t->c_cflag; 774 775 if (sc->sc_methods->ucom_param != NULL) { 776 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 777 t); 778 if (error) 779 return (error); 780 } 781 782 // XXX worry about CHWFLOW 783 784 /* 785 * Update the tty layer's idea of the carrier bit, in case we changed 786 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 787 * explicit request. 788 */ 789 DPRINTF(("ucomparam: l_modem\n")); 790 (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); 791 792 #if 0 793 XXX what if the hardware is not open 794 if (!ISSET(t->c_cflag, CHWFLOW)) { 795 if (sc->sc_tx_stopped) { 796 sc->sc_tx_stopped = 0; 797 ucomstart(tp); 798 } 799 } 800 #endif 801 802 return (0); 803 } 804 805 /* 806 * (un)block input via hw flowcontrol 807 */ 808 Static void 809 ucom_hwiflow(sc) 810 struct ucom_softc *sc; 811 { 812 DPRINTF(("ucom_hwiflow:\n")); 813 #if 0 814 XXX 815 bus_space_tag_t iot = sc->sc_iot; 816 bus_space_handle_t ioh = sc->sc_ioh; 817 818 if (sc->sc_mcr_rts == 0) 819 return; 820 821 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 822 CLR(sc->sc_mcr, sc->sc_mcr_rts); 823 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 824 } else { 825 SET(sc->sc_mcr, sc->sc_mcr_rts); 826 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 827 } 828 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 829 #endif 830 } 831 832 Static void 833 ucomstart(tp) 834 struct tty *tp; 835 { 836 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 837 usbd_status err; 838 int s; 839 u_char *data; 840 int cnt; 841 842 if (sc->sc_dying) 843 return; 844 845 s = spltty(); 846 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 847 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 848 goto out; 849 } 850 if (sc->sc_tx_stopped) 851 goto out; 852 853 if (tp->t_outq.c_cc <= tp->t_lowat) { 854 if (ISSET(tp->t_state, TS_ASLEEP)) { 855 CLR(tp->t_state, TS_ASLEEP); 856 wakeup(&tp->t_outq); 857 } 858 selwakeup(&tp->t_wsel); 859 if (tp->t_outq.c_cc == 0) 860 goto out; 861 } 862 863 /* Grab the first contiguous region of buffer space. */ 864 data = tp->t_outq.c_cf; 865 cnt = ndqb(&tp->t_outq, 0); 866 867 if (cnt == 0) { 868 DPRINTF(("ucomstart: cnt==0\n")); 869 goto out; 870 } 871 872 SET(tp->t_state, TS_BUSY); 873 874 if (cnt > sc->sc_obufsize) { 875 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 876 cnt = sc->sc_obufsize; 877 } 878 memcpy(sc->sc_obuf, data, cnt); 879 880 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 881 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 882 (usbd_private_handle)sc, sc->sc_obuf, cnt, 883 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 884 /* What can we do on error? */ 885 err = usbd_transfer(sc->sc_oxfer); 886 #ifdef DIAGNOSTIC 887 if (err != USBD_IN_PROGRESS) 888 printf("ucomstart: err=%s\n", usbd_errstr(err)); 889 #endif 890 891 out: 892 splx(s); 893 } 894 895 void 896 ucomstop(tp, flag) 897 struct tty *tp; 898 int flag; 899 { 900 DPRINTF(("ucomstop: flag=%d\n", flag)); 901 #if 0 902 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 903 int s; 904 905 s = spltty(); 906 if (ISSET(tp->t_state, TS_BUSY)) { 907 DPRINTF(("ucomstop: XXX\n")); 908 /* sc->sc_tx_stopped = 1; */ 909 if (!ISSET(tp->t_state, TS_TTSTOP)) 910 SET(tp->t_state, TS_FLUSH); 911 } 912 splx(s); 913 #endif 914 } 915 916 Static void 917 ucomwritecb(xfer, p, status) 918 usbd_xfer_handle xfer; 919 usbd_private_handle p; 920 usbd_status status; 921 { 922 struct ucom_softc *sc = (struct ucom_softc *)p; 923 struct tty *tp = sc->sc_tty; 924 u_int32_t cc; 925 int s; 926 927 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 928 929 if (status == USBD_CANCELLED) 930 return; 931 932 if (status) { 933 DPRINTF(("ucomwritecb: status=%d\n", status)); 934 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 935 /* XXX we should restart after some delay. */ 936 return; 937 } 938 939 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 940 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 941 942 s = spltty(); 943 CLR(tp->t_state, TS_BUSY); 944 if (ISSET(tp->t_state, TS_FLUSH)) 945 CLR(tp->t_state, TS_FLUSH); 946 else 947 ndflush(&tp->t_outq, cc); 948 (*linesw[tp->t_line].l_start)(tp); 949 splx(s); 950 } 951 952 Static usbd_status 953 ucomstartread(sc) 954 struct ucom_softc *sc; 955 { 956 usbd_status err; 957 958 DPRINTFN(5,("ucomstartread: start\n")); 959 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 960 (usbd_private_handle)sc, 961 sc->sc_ibuf, sc->sc_ibufsize, 962 USBD_SHORT_XFER_OK | USBD_NO_COPY, 963 USBD_NO_TIMEOUT, ucomreadcb); 964 err = usbd_transfer(sc->sc_ixfer); 965 if (err != USBD_IN_PROGRESS) { 966 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 967 return (err); 968 } 969 return (USBD_NORMAL_COMPLETION); 970 } 971 972 Static void 973 ucomreadcb(xfer, p, status) 974 usbd_xfer_handle xfer; 975 usbd_private_handle p; 976 usbd_status status; 977 { 978 struct ucom_softc *sc = (struct ucom_softc *)p; 979 struct tty *tp = sc->sc_tty; 980 int (*rint) __P((int c, struct tty *tp)) = linesw[tp->t_line].l_rint; 981 usbd_status err; 982 u_int32_t cc; 983 u_char *cp; 984 int s; 985 986 if (status == USBD_CANCELLED) 987 return; 988 989 if (status) { 990 DPRINTF(("ucomreadcb: status=%d\n", status)); 991 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 992 /* XXX we should restart after some delay. */ 993 return; 994 } 995 996 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 997 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 998 s = spltty(); 999 /* Give characters to tty layer. */ 1000 while (cc-- > 0) { 1001 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1002 if ((*rint)(*cp++, tp) == -1) { 1003 /* XXX what should we do? */ 1004 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1005 cc); 1006 break; 1007 } 1008 } 1009 splx(s); 1010 1011 err = ucomstartread(sc); 1012 if (err) { 1013 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1014 /* XXX what should we dow now? */ 1015 } 1016 } 1017 1018 Static void 1019 ucom_cleanup(sc) 1020 struct ucom_softc *sc; 1021 { 1022 DPRINTF(("ucom_cleanup: closing pipes\n")); 1023 1024 ucom_shutdown(sc); 1025 usbd_abort_pipe(sc->sc_bulkin_pipe); 1026 usbd_close_pipe(sc->sc_bulkin_pipe); 1027 usbd_abort_pipe(sc->sc_bulkout_pipe); 1028 usbd_close_pipe(sc->sc_bulkout_pipe); 1029 usbd_free_xfer(sc->sc_ixfer); 1030 usbd_free_xfer(sc->sc_oxfer); 1031 } 1032 1033 #endif /* NUCOM > 0 */ 1034 1035 int 1036 ucomprint(aux, pnp) 1037 void *aux; 1038 const char *pnp; 1039 { 1040 1041 if (pnp) 1042 printf("ucom at %s\n", pnp); 1043 return (UNCONF); 1044 } 1045 1046 int 1047 ucomsubmatch(parent, cf, aux) 1048 struct device *parent; 1049 struct cfdata *cf; 1050 void *aux; 1051 { 1052 struct ucom_attach_args *uca = aux; 1053 1054 if (uca->portno != UCOM_UNK_PORTNO && 1055 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1056 cf->ucomcf_portno != uca->portno) 1057 return (0); 1058 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1059 } 1060
Indexes created Mon Oct 20 01:09:56 GMT 2025