1 /* $NetBSD: ucom.c,v 1.24 2000/06/01 14:28:59 augustss 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/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/ioctl.h> 47 #include <sys/conf.h> 48 #include <sys/tty.h> 49 #include <sys/file.h> 50 #include <sys/select.h> 51 #include <sys/proc.h> 52 #include <sys/vnode.h> 53 #include <sys/device.h> 54 #include <sys/poll.h> 55 56 #include <dev/usb/usb.h> 57 58 #include <dev/usb/usbdi.h> 59 #include <dev/usb/usbdi_util.h> 60 #include <dev/usb/usbdevs.h> 61 #include <dev/usb/usb_quirks.h> 62 63 #include <dev/usb/ucomvar.h> 64 65 #include "ucom.h" 66 67 #if NUCOM > 0 68 69 #ifdef UCOM_DEBUG 70 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 71 int ucomdebug = 0; 72 #else 73 #define DPRINTFN(n, x) 74 #endif 75 #define DPRINTF(x) DPRINTFN(0, x) 76 77 #define UCOMUNIT_MASK 0x3ffff 78 #define UCOMDIALOUT_MASK 0x80000 79 #define UCOMCALLUNIT_MASK 0x40000 80 81 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 82 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 83 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 84 85 struct ucom_softc { 86 USBBASEDEVICE sc_dev; /* base device */ 87 88 usbd_device_handle sc_udev; /* USB device */ 89 90 usbd_interface_handle sc_iface; /* data interface */ 91 92 int sc_bulkin_no; /* bulk in endpoint address */ 93 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 94 usbd_xfer_handle sc_ixfer; /* read request */ 95 u_char *sc_ibuf; /* read buffer */ 96 u_int sc_ibufsize; /* read buffer size */ 97 u_int sc_ibufsizepad; /* read buffer size padded */ 98 99 int sc_bulkout_no; /* bulk out endpoint address */ 100 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 101 usbd_xfer_handle sc_oxfer; /* write request */ 102 u_char *sc_obuf; /* write buffer */ 103 u_int sc_obufsize; /* write buffer size */ 104 u_int sc_obufsizepad; /* write buffer size padded */ 105 106 struct ucom_methods *sc_methods; 107 void *sc_parent; 108 int sc_portno; 109 110 struct tty *sc_tty; /* our tty */ 111 u_char sc_lsr; 112 u_char sc_msr; 113 u_char sc_mcr; 114 u_char sc_tx_stopped; 115 int sc_swflags; 116 117 u_char sc_opening; /* lock during open */ 118 int sc_refcnt; 119 u_char sc_dying; /* disconnecting */ 120 }; 121 122 cdev_decl(ucom); 123 124 Static void ucom_cleanup(struct ucom_softc *); 125 Static void ucom_hwiflow(struct ucom_softc *); 126 Static int ucomparam(struct tty *, struct termios *); 127 Static void ucomstart(struct tty *); 128 Static void ucom_shutdown(struct ucom_softc *); 129 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 130 int, struct proc *); 131 Static void ucom_dtr(struct ucom_softc *, int); 132 Static void ucom_rts(struct ucom_softc *, int); 133 Static void ucom_break(struct ucom_softc *, int); 134 Static usbd_status ucomstartread(struct ucom_softc *); 135 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 136 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 137 Static void tiocm_to_ucom(struct ucom_softc *, int, int); 138 Static int ucom_to_tiocm(struct ucom_softc *); 139 140 USB_DECLARE_DRIVER(ucom); 141 142 USB_MATCH(ucom) 143 { 144 return (1); 145 } 146 147 USB_ATTACH(ucom) 148 { 149 struct ucom_softc *sc = (struct ucom_softc *)self; 150 struct ucom_attach_args *uca = aux; 151 struct tty *tp; 152 153 if (uca->portno != UCOM_UNK_PORTNO) 154 printf(": portno %d", uca->portno); 155 printf("\n"); 156 157 sc->sc_udev = uca->device; 158 sc->sc_iface = uca->iface; 159 sc->sc_bulkout_no = uca->bulkout; 160 sc->sc_bulkin_no = uca->bulkin; 161 sc->sc_ibufsize = uca->ibufsize; 162 sc->sc_ibufsizepad = uca->ibufsizepad; 163 sc->sc_obufsize = uca->obufsize; 164 sc->sc_obufsizepad = uca->obufsizepad; 165 sc->sc_methods = uca->methods; 166 sc->sc_parent = uca->arg; 167 sc->sc_portno = uca->portno; 168 169 tp = ttymalloc(); 170 tp->t_oproc = ucomstart; 171 tp->t_param = ucomparam; 172 sc->sc_tty = tp; 173 174 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 175 tty_attach(tp); 176 177 USB_ATTACH_SUCCESS_RETURN; 178 } 179 180 USB_DETACH(ucom) 181 { 182 struct ucom_softc *sc = (struct ucom_softc *)self; 183 int maj, mn; 184 int s; 185 186 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p\n", 187 sc, flags, sc->sc_tty)); 188 189 sc->sc_dying = 1; 190 191 #ifdef DIAGNOSTIC 192 if (sc->sc_tty == NULL) { 193 DPRINTF(("ucom_detach: no tty\n")); 194 return (0); 195 } 196 #endif 197 198 s = splusb(); 199 if (--sc->sc_refcnt >= 0) { 200 /* Wake everyone.. how? */ 201 /* Wait for processes to go away. */ 202 usb_detach_wait(USBDEV(sc->sc_dev)); 203 } 204 splx(s); 205 206 /* locate the major number */ 207 for (maj = 0; maj < nchrdev; maj++) 208 if (cdevsw[maj].d_open == ucomopen) 209 break; 210 211 /* Nuke the vnodes for any open instances. */ 212 mn = self->dv_unit; 213 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 214 vdevgone(maj, mn, mn, VCHR); 215 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 216 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 217 218 /* Detach and free the tty. */ 219 tty_detach(sc->sc_tty); 220 ttyfree(sc->sc_tty); 221 sc->sc_tty = 0; 222 223 return (0); 224 } 225 226 #if defined(__NetBSD__) || defined(__OpenBSD__) 227 int 228 ucom_activate(device_ptr_t self, enum devact act) 229 { 230 struct ucom_softc *sc = (struct ucom_softc *)self; 231 232 switch (act) { 233 case DVACT_ACTIVATE: 234 return (EOPNOTSUPP); 235 break; 236 237 case DVACT_DEACTIVATE: 238 sc->sc_dying = 1; 239 break; 240 } 241 return (0); 242 } 243 #endif 244 245 void 246 ucom_shutdown(struct ucom_softc *sc) 247 { 248 struct tty *tp = sc->sc_tty; 249 250 DPRINTF(("ucom_shutdown\n")); 251 /* 252 * Hang up if necessary. Wait a bit, so the other side has time to 253 * notice even if we immediately open the port again. 254 */ 255 if (ISSET(tp->t_cflag, HUPCL)) { 256 ucom_dtr(sc, 0); 257 (void)tsleep(sc, TTIPRI, ttclos, hz); 258 } 259 } 260 261 int 262 ucomopen(dev_t dev, int flag, int mode, struct proc *p) 263 { 264 int unit = UCOMUNIT(dev); 265 usbd_status err; 266 struct ucom_softc *sc; 267 struct tty *tp; 268 int s; 269 int error; 270 271 if (unit >= ucom_cd.cd_ndevs) 272 return (ENXIO); 273 sc = ucom_cd.cd_devs[unit]; 274 if (sc == NULL) 275 return (ENXIO); 276 277 if (sc->sc_dying) 278 return (EIO); 279 280 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 281 return (ENXIO); 282 283 tp = sc->sc_tty; 284 285 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 286 287 if (ISSET(tp->t_state, TS_ISOPEN) && 288 ISSET(tp->t_state, TS_XCLUDE) && 289 p->p_ucred->cr_uid != 0) 290 return (EBUSY); 291 292 s = spltty(); 293 294 /* 295 * Do the following iff this is a first open. 296 */ 297 while (sc->sc_opening) 298 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 299 300 if (sc->sc_dying) { 301 splx(s); 302 return (EIO); 303 } 304 sc->sc_opening = 1; 305 306 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 307 struct termios t; 308 309 tp->t_dev = dev; 310 311 if (sc->sc_methods->ucom_open != NULL) { 312 error = sc->sc_methods->ucom_open(sc->sc_parent, 313 sc->sc_portno); 314 if (error) { 315 ucom_cleanup(sc); 316 return (error); 317 } 318 } 319 320 ucom_status_change(sc); 321 322 /* 323 * Initialize the termios status to the defaults. Add in the 324 * sticky bits from TIOCSFLAGS. 325 */ 326 t.c_ispeed = 0; 327 t.c_ospeed = TTYDEF_SPEED; 328 t.c_cflag = TTYDEF_CFLAG; 329 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 330 SET(t.c_cflag, CLOCAL); 331 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 332 SET(t.c_cflag, CRTSCTS); 333 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 334 SET(t.c_cflag, MDMBUF); 335 /* Make sure ucomparam() will do something. */ 336 tp->t_ospeed = 0; 337 (void) ucomparam(tp, &t); 338 tp->t_iflag = TTYDEF_IFLAG; 339 tp->t_oflag = TTYDEF_OFLAG; 340 tp->t_lflag = TTYDEF_LFLAG; 341 ttychars(tp); 342 ttsetwater(tp); 343 344 /* 345 * Turn on DTR. We must always do this, even if carrier is not 346 * present, because otherwise we'd have to use TIOCSDTR 347 * immediately after setting CLOCAL, which applications do not 348 * expect. We always assert DTR while the device is open 349 * unless explicitly requested to deassert it. 350 */ 351 ucom_dtr(sc, 1); 352 353 // XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 354 ucom_hwiflow(sc); 355 356 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 357 sc->sc_bulkin_no, sc->sc_bulkout_no)); 358 359 /* Open the bulk pipes */ 360 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 361 &sc->sc_bulkin_pipe); 362 if (err) { 363 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 364 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 365 usbd_errstr(err))); 366 return (EIO); 367 } 368 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 369 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 370 if (err) { 371 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 372 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 373 usbd_errstr(err))); 374 usbd_close_pipe(sc->sc_bulkin_pipe); 375 return (EIO); 376 } 377 378 /* Allocate a request and an input buffer and start reading. */ 379 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 380 if (sc->sc_ixfer == NULL) { 381 usbd_close_pipe(sc->sc_bulkin_pipe); 382 usbd_close_pipe(sc->sc_bulkout_pipe); 383 return (ENOMEM); 384 } 385 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 386 sc->sc_ibufsizepad); 387 if (sc->sc_ibuf == 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 } 393 394 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 395 if (sc->sc_oxfer == NULL) { 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 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 402 sc->sc_obufsizepad); 403 if (sc->sc_obuf == NULL) { 404 usbd_free_xfer(sc->sc_oxfer); 405 usbd_free_xfer(sc->sc_ixfer); 406 usbd_close_pipe(sc->sc_bulkin_pipe); 407 usbd_close_pipe(sc->sc_bulkout_pipe); 408 return (ENOMEM); 409 } 410 411 ucomstartread(sc); 412 } 413 sc->sc_opening = 0; 414 wakeup(&sc->sc_opening); 415 splx(s); 416 417 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 418 if (error) 419 goto bad; 420 421 error = (*linesw[tp->t_line].l_open)(dev, tp); 422 if (error) 423 goto bad; 424 425 return (0); 426 427 bad: 428 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 429 /* 430 * We failed to open the device, and nobody else had it opened. 431 * Clean up the state as appropriate. 432 */ 433 ucom_cleanup(sc); 434 } 435 436 return (error); 437 } 438 439 int 440 ucomclose(dev_t dev, int flag, int mode, struct proc *p) 441 { 442 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 443 struct tty *tp = sc->sc_tty; 444 445 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 446 if (!ISSET(tp->t_state, TS_ISOPEN)) 447 return (0); 448 449 sc->sc_refcnt++; 450 451 (*linesw[tp->t_line].l_close)(tp, flag); 452 ttyclose(tp); 453 454 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 455 /* 456 * Although we got a last close, the device may still be in 457 * use; e.g. if this was the dialout node, and there are still 458 * processes waiting for carrier on the non-dialout node. 459 */ 460 ucom_cleanup(sc); 461 } 462 463 if (sc->sc_methods->ucom_close != NULL) 464 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 465 466 if (--sc->sc_refcnt < 0) 467 usb_detach_wakeup(USBDEV(sc->sc_dev)); 468 469 return (0); 470 } 471 472 int 473 ucomread(dev_t dev, struct uio *uio, 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_t dev, struct uio *uio, int flag) 491 { 492 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 493 struct tty *tp = sc->sc_tty; 494 int error; 495 496 if (sc->sc_dying) 497 return (EIO); 498 499 sc->sc_refcnt++; 500 error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 501 if (--sc->sc_refcnt < 0) 502 usb_detach_wakeup(USBDEV(sc->sc_dev)); 503 return (error); 504 } 505 506 struct tty * 507 ucomtty(dev_t dev) 508 { 509 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 510 struct tty *tp = sc->sc_tty; 511 512 return (tp); 513 } 514 515 int 516 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 517 { 518 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 519 int error; 520 521 sc->sc_refcnt++; 522 error = ucom_do_ioctl(sc, cmd, data, flag, p); 523 if (--sc->sc_refcnt < 0) 524 usb_detach_wakeup(USBDEV(sc->sc_dev)); 525 return (error); 526 } 527 528 Static int 529 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 530 int flag, struct proc *p) 531 { 532 struct tty *tp = sc->sc_tty; 533 int error; 534 int s; 535 536 if (sc->sc_dying) 537 return (EIO); 538 539 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 540 541 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 542 if (error >= 0) 543 return (error); 544 545 error = ttioctl(tp, cmd, data, flag, p); 546 if (error >= 0) 547 return (error); 548 549 if (sc->sc_methods->ucom_ioctl != NULL) { 550 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 551 sc->sc_portno, cmd, data, flag, p); 552 if (error >= 0) 553 return (error); 554 } 555 556 error = 0; 557 558 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 559 s = spltty(); 560 561 switch (cmd) { 562 case TIOCSBRK: 563 ucom_break(sc, 1); 564 break; 565 566 case TIOCCBRK: 567 ucom_break(sc, 0); 568 break; 569 570 case TIOCSDTR: 571 ucom_dtr(sc, 1); 572 break; 573 574 case TIOCCDTR: 575 ucom_dtr(sc, 0); 576 break; 577 578 case TIOCGFLAGS: 579 *(int *)data = sc->sc_swflags; 580 break; 581 582 case TIOCSFLAGS: 583 error = suser(p->p_ucred, &p->p_acflag); 584 if (error) 585 break; 586 sc->sc_swflags = *(int *)data; 587 break; 588 589 case TIOCMSET: 590 case TIOCMBIS: 591 case TIOCMBIC: 592 tiocm_to_ucom(sc, cmd, *(int *)data); 593 break; 594 595 case TIOCMGET: 596 *(int *)data = ucom_to_tiocm(sc); 597 break; 598 599 default: 600 error = ENOTTY; 601 break; 602 } 603 604 splx(s); 605 606 return (error); 607 } 608 609 Static void 610 tiocm_to_ucom(struct ucom_softc *sc, int how, int ttybits) 611 { 612 u_char combits; 613 614 combits = 0; 615 if (ISSET(ttybits, TIOCM_DTR)) 616 SET(combits, UMCR_DTR); 617 if (ISSET(ttybits, TIOCM_RTS)) 618 SET(combits, UMCR_RTS); 619 620 switch (how) { 621 case TIOCMBIC: 622 CLR(sc->sc_mcr, combits); 623 break; 624 625 case TIOCMBIS: 626 SET(sc->sc_mcr, combits); 627 break; 628 629 case TIOCMSET: 630 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 631 SET(sc->sc_mcr, combits); 632 break; 633 } 634 635 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 636 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 637 } 638 639 Static int 640 ucom_to_tiocm(struct ucom_softc *sc) 641 { 642 u_char combits; 643 int ttybits = 0; 644 645 combits = sc->sc_mcr; 646 if (ISSET(combits, UMCR_DTR)) 647 SET(ttybits, TIOCM_DTR); 648 if (ISSET(combits, UMCR_RTS)) 649 SET(ttybits, TIOCM_RTS); 650 651 combits = sc->sc_msr; 652 if (ISSET(combits, UMSR_DCD)) 653 SET(ttybits, TIOCM_CD); 654 if (ISSET(combits, UMSR_CTS)) 655 SET(ttybits, TIOCM_CTS); 656 if (ISSET(combits, UMSR_DSR)) 657 SET(ttybits, TIOCM_DSR); 658 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 659 SET(ttybits, TIOCM_RI); 660 661 #if 0 662 XXX; 663 if (sc->sc_ier != 0) 664 SET(ttybits, TIOCM_LE); 665 #endif 666 667 return (ttybits); 668 } 669 670 Static void 671 ucom_break(sc, onoff) 672 struct ucom_softc *sc; 673 int onoff; 674 { 675 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 676 677 if (sc->sc_methods->ucom_set != NULL) 678 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 679 UCOM_SET_BREAK, onoff); 680 } 681 682 Static void 683 ucom_dtr(struct ucom_softc *sc, int onoff) 684 { 685 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 686 687 if (sc->sc_methods->ucom_set != NULL) 688 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 689 UCOM_SET_DTR, onoff); 690 } 691 692 Static void 693 ucom_rts(struct ucom_softc *sc, int onoff) 694 { 695 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 696 697 if (sc->sc_methods->ucom_set != NULL) 698 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 699 UCOM_SET_RTS, onoff); 700 } 701 702 void 703 ucom_status_change(struct ucom_softc *sc) 704 { 705 if (sc->sc_methods->ucom_get_status != NULL) { 706 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 707 &sc->sc_lsr, &sc->sc_msr); 708 } else { 709 sc->sc_lsr = 0; 710 sc->sc_msr = 0; 711 } 712 } 713 714 Static int 715 ucomparam(struct tty *tp, struct termios *t) 716 { 717 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 718 int error; 719 720 if (sc->sc_dying) 721 return (EIO); 722 723 /* Check requested parameters. */ 724 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 725 return (EINVAL); 726 727 /* 728 * For the console, always force CLOCAL and !HUPCL, so that the port 729 * is always active. 730 */ 731 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 732 SET(t->c_cflag, CLOCAL); 733 CLR(t->c_cflag, HUPCL); 734 } 735 736 /* 737 * If there were no changes, don't do anything. This avoids dropping 738 * input and improves performance when all we did was frob things like 739 * VMIN and VTIME. 740 */ 741 if (tp->t_ospeed == t->c_ospeed && 742 tp->t_cflag == t->c_cflag) 743 return (0); 744 745 //XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 746 747 /* And copy to tty. */ 748 tp->t_ispeed = 0; 749 tp->t_ospeed = t->c_ospeed; 750 tp->t_cflag = t->c_cflag; 751 752 if (sc->sc_methods->ucom_param != NULL) { 753 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 754 t); 755 if (error) 756 return (error); 757 } 758 759 // XXX worry about CHWFLOW 760 761 /* 762 * Update the tty layer's idea of the carrier bit, in case we changed 763 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 764 * explicit request. 765 */ 766 DPRINTF(("ucomparam: l_modem\n")); 767 (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); 768 769 #if 0 770 XXX what if the hardware is not open 771 if (!ISSET(t->c_cflag, CHWFLOW)) { 772 if (sc->sc_tx_stopped) { 773 sc->sc_tx_stopped = 0; 774 ucomstart(tp); 775 } 776 } 777 #endif 778 779 return (0); 780 } 781 782 /* 783 * (un)block input via hw flowcontrol 784 */ 785 Static void 786 ucom_hwiflow(struct ucom_softc *sc) 787 { 788 DPRINTF(("ucom_hwiflow:\n")); 789 #if 0 790 XXX 791 bus_space_tag_t iot = sc->sc_iot; 792 bus_space_handle_t ioh = sc->sc_ioh; 793 794 if (sc->sc_mcr_rts == 0) 795 return; 796 797 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 798 CLR(sc->sc_mcr, sc->sc_mcr_rts); 799 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 800 } else { 801 SET(sc->sc_mcr, sc->sc_mcr_rts); 802 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 803 } 804 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 805 #endif 806 } 807 808 Static void 809 ucomstart(struct tty *tp) 810 { 811 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 812 usbd_status err; 813 int s; 814 u_char *data; 815 int cnt; 816 817 if (sc->sc_dying) 818 return; 819 820 s = spltty(); 821 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 822 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 823 goto out; 824 } 825 if (sc->sc_tx_stopped) 826 goto out; 827 828 if (tp->t_outq.c_cc <= tp->t_lowat) { 829 if (ISSET(tp->t_state, TS_ASLEEP)) { 830 CLR(tp->t_state, TS_ASLEEP); 831 wakeup(&tp->t_outq); 832 } 833 selwakeup(&tp->t_wsel); 834 if (tp->t_outq.c_cc == 0) 835 goto out; 836 } 837 838 /* Grab the first contiguous region of buffer space. */ 839 data = tp->t_outq.c_cf; 840 cnt = ndqb(&tp->t_outq, 0); 841 842 if (cnt == 0) { 843 DPRINTF(("ucomstart: cnt==0\n")); 844 goto out; 845 } 846 847 SET(tp->t_state, TS_BUSY); 848 849 if (cnt > sc->sc_obufsize) { 850 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 851 cnt = sc->sc_obufsize; 852 } 853 if (sc->sc_methods->ucom_write != NULL) 854 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 855 sc->sc_obuf, data, &cnt); 856 else 857 memcpy(sc->sc_obuf, data, cnt); 858 859 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 860 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 861 (usbd_private_handle)sc, sc->sc_obuf, cnt, 862 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 863 /* What can we do on error? */ 864 err = usbd_transfer(sc->sc_oxfer); 865 #ifdef DIAGNOSTIC 866 if (err != USBD_IN_PROGRESS) 867 printf("ucomstart: err=%s\n", usbd_errstr(err)); 868 #endif 869 870 out: 871 splx(s); 872 } 873 874 void 875 ucomstop(struct tty *tp, int flag) 876 { 877 DPRINTF(("ucomstop: flag=%d\n", flag)); 878 #if 0 879 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 880 int s; 881 882 s = spltty(); 883 if (ISSET(tp->t_state, TS_BUSY)) { 884 DPRINTF(("ucomstop: XXX\n")); 885 /* sc->sc_tx_stopped = 1; */ 886 if (!ISSET(tp->t_state, TS_TTSTOP)) 887 SET(tp->t_state, TS_FLUSH); 888 } 889 splx(s); 890 #endif 891 } 892 893 Static void 894 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 895 { 896 struct ucom_softc *sc = (struct ucom_softc *)p; 897 struct tty *tp = sc->sc_tty; 898 u_int32_t cc; 899 int s; 900 901 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 902 903 if (status == USBD_CANCELLED) 904 return; 905 906 if (status) { 907 DPRINTF(("ucomwritecb: status=%d\n", status)); 908 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 909 /* XXX we should restart after some delay. */ 910 return; 911 } 912 913 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 914 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 915 916 s = spltty(); 917 CLR(tp->t_state, TS_BUSY); 918 if (ISSET(tp->t_state, TS_FLUSH)) 919 CLR(tp->t_state, TS_FLUSH); 920 else 921 ndflush(&tp->t_outq, cc); 922 (*linesw[tp->t_line].l_start)(tp); 923 splx(s); 924 } 925 926 Static usbd_status 927 ucomstartread(struct ucom_softc *sc) 928 { 929 usbd_status err; 930 931 DPRINTFN(5,("ucomstartread: start\n")); 932 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 933 (usbd_private_handle)sc, 934 sc->sc_ibuf, sc->sc_ibufsize, 935 USBD_SHORT_XFER_OK | USBD_NO_COPY, 936 USBD_NO_TIMEOUT, ucomreadcb); 937 err = usbd_transfer(sc->sc_ixfer); 938 if (err != USBD_IN_PROGRESS) { 939 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 940 return (err); 941 } 942 return (USBD_NORMAL_COMPLETION); 943 } 944 945 Static void 946 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 947 { 948 struct ucom_softc *sc = (struct ucom_softc *)p; 949 struct tty *tp = sc->sc_tty; 950 int (*rint)(int c, struct tty *tp) = linesw[tp->t_line].l_rint; 951 usbd_status err; 952 u_int32_t cc; 953 u_char *cp; 954 int s; 955 956 if (status == USBD_CANCELLED) 957 return; 958 959 if (status) { 960 DPRINTF(("ucomreadcb: status=%d\n", status)); 961 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 962 /* XXX we should restart after some delay. */ 963 return; 964 } 965 966 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 967 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 968 if (sc->sc_methods->ucom_read != NULL) 969 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 970 &cp, &cc); 971 972 s = spltty(); 973 /* Give characters to tty layer. */ 974 while (cc-- > 0) { 975 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 976 if ((*rint)(*cp++, tp) == -1) { 977 /* XXX what should we do? */ 978 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 979 cc); 980 break; 981 } 982 } 983 splx(s); 984 985 err = ucomstartread(sc); 986 if (err) { 987 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 988 /* XXX what should we dow now? */ 989 } 990 } 991 992 Static void 993 ucom_cleanup(struct ucom_softc *sc) 994 { 995 DPRINTF(("ucom_cleanup: closing pipes\n")); 996 997 ucom_shutdown(sc); 998 usbd_abort_pipe(sc->sc_bulkin_pipe); 999 usbd_close_pipe(sc->sc_bulkin_pipe); 1000 usbd_abort_pipe(sc->sc_bulkout_pipe); 1001 usbd_close_pipe(sc->sc_bulkout_pipe); 1002 usbd_free_xfer(sc->sc_ixfer); 1003 usbd_free_xfer(sc->sc_oxfer); 1004 } 1005 1006 #endif /* NUCOM > 0 */ 1007 1008 int 1009 ucomprint(void *aux, const char *pnp) 1010 { 1011 1012 if (pnp) 1013 printf("ucom at %s\n", pnp); 1014 return (UNCONF); 1015 } 1016 1017 int 1018 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1019 { 1020 struct ucom_attach_args *uca = aux; 1021 1022 if (uca->portno != UCOM_UNK_PORTNO && 1023 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1024 cf->ucomcf_portno != uca->portno) 1025 return (0); 1026 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1027 } 1028