1 /* $NetBSD: ucom.c,v 1.42 2002/03/17 19:41:04 atatat Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 /* 40 * This code is very heavily based on the 16550 driver, com.c. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.42 2002/03/17 19:41:04 atatat Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/ioctl.h> 50 #include <sys/conf.h> 51 #include <sys/tty.h> 52 #include <sys/file.h> 53 #include <sys/select.h> 54 #include <sys/proc.h> 55 #include <sys/vnode.h> 56 #include <sys/device.h> 57 #include <sys/poll.h> 58 #if defined(__NetBSD__) 59 #include "rnd.h" 60 #if NRND > 0 61 #include <sys/rnd.h> 62 #endif 63 #endif 64 65 #include <dev/usb/usb.h> 66 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 #include <dev/usb/usbdevs.h> 70 #include <dev/usb/usb_quirks.h> 71 72 #include <dev/usb/ucomvar.h> 73 74 #include "ucom.h" 75 76 #if NUCOM > 0 77 78 #ifdef UCOM_DEBUG 79 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 80 int ucomdebug = 0; 81 #else 82 #define DPRINTFN(n, x) 83 #endif 84 #define DPRINTF(x) DPRINTFN(0, x) 85 86 #define UCOMUNIT_MASK 0x3ffff 87 #define UCOMDIALOUT_MASK 0x80000 88 #define UCOMCALLUNIT_MASK 0x40000 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 #if defined(__NetBSD__) && NRND > 0 132 rndsource_element_t sc_rndsource; /* random source */ 133 #endif 134 }; 135 136 cdev_decl(ucom); 137 138 Static void ucom_cleanup(struct ucom_softc *); 139 Static void ucom_hwiflow(struct ucom_softc *); 140 Static int ucomparam(struct tty *, struct termios *); 141 Static void ucomstart(struct tty *); 142 Static void ucom_shutdown(struct ucom_softc *); 143 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 144 int, usb_proc_ptr); 145 Static void ucom_dtr(struct ucom_softc *, int); 146 Static void ucom_rts(struct ucom_softc *, int); 147 Static void ucom_break(struct ucom_softc *, int); 148 Static usbd_status ucomstartread(struct ucom_softc *); 149 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 150 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 151 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 152 Static int ucom_to_tiocm(struct ucom_softc *); 153 154 USB_DECLARE_DRIVER(ucom); 155 156 USB_MATCH(ucom) 157 { 158 return (1); 159 } 160 161 USB_ATTACH(ucom) 162 { 163 struct ucom_softc *sc = (struct ucom_softc *)self; 164 struct ucom_attach_args *uca = aux; 165 struct tty *tp; 166 167 if (uca->portno != UCOM_UNK_PORTNO) 168 printf(": portno %d", uca->portno); 169 if (uca->info != NULL) 170 printf(", %s", uca->info); 171 printf("\n"); 172 173 sc->sc_udev = uca->device; 174 sc->sc_iface = uca->iface; 175 sc->sc_bulkout_no = uca->bulkout; 176 sc->sc_bulkin_no = uca->bulkin; 177 sc->sc_ibufsize = uca->ibufsize; 178 sc->sc_ibufsizepad = uca->ibufsizepad; 179 sc->sc_obufsize = uca->obufsize; 180 sc->sc_opkthdrlen = uca->opkthdrlen; 181 sc->sc_methods = uca->methods; 182 sc->sc_parent = uca->arg; 183 sc->sc_portno = uca->portno; 184 185 tp = ttymalloc(); 186 tp->t_oproc = ucomstart; 187 tp->t_param = ucomparam; 188 sc->sc_tty = tp; 189 190 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 191 tty_attach(tp); 192 193 #if defined(__NetBSD__) && NRND > 0 194 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 195 RND_TYPE_TTY, 0); 196 #endif 197 198 USB_ATTACH_SUCCESS_RETURN; 199 } 200 201 USB_DETACH(ucom) 202 { 203 struct ucom_softc *sc = (struct ucom_softc *)self; 204 struct tty *tp = sc->sc_tty; 205 int maj, mn; 206 int s; 207 208 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 209 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 210 211 sc->sc_dying = 1; 212 213 if (sc->sc_bulkin_pipe != NULL) 214 usbd_abort_pipe(sc->sc_bulkin_pipe); 215 if (sc->sc_bulkout_pipe != NULL) 216 usbd_abort_pipe(sc->sc_bulkout_pipe); 217 218 s = splusb(); 219 if (--sc->sc_refcnt >= 0) { 220 /* Wake up anyone waiting */ 221 if (tp != NULL) { 222 CLR(tp->t_state, TS_CARR_ON); 223 CLR(tp->t_cflag, CLOCAL | MDMBUF); 224 ttyflush(tp, FREAD|FWRITE); 225 } 226 /* Wait for processes to go away. */ 227 usb_detach_wait(USBDEV(sc->sc_dev)); 228 } 229 splx(s); 230 231 /* locate the major number */ 232 for (maj = 0; maj < nchrdev; maj++) 233 if (cdevsw[maj].d_open == ucomopen) 234 break; 235 236 /* Nuke the vnodes for any open instances. */ 237 mn = self->dv_unit; 238 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 239 vdevgone(maj, mn, mn, VCHR); 240 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 241 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 242 243 /* Detach and free the tty. */ 244 if (tp != NULL) { 245 tty_detach(tp); 246 ttyfree(tp); 247 sc->sc_tty = NULL; 248 } 249 250 /* Detach the random source */ 251 #if defined(__NetBSD__) && NRND > 0 252 rnd_detach_source(&sc->sc_rndsource); 253 #endif 254 255 return (0); 256 } 257 258 int 259 ucom_activate(device_ptr_t self, enum devact act) 260 { 261 struct ucom_softc *sc = (struct ucom_softc *)self; 262 263 DPRINTFN(5,("ucom_activate: %d\n", act)); 264 265 switch (act) { 266 case DVACT_ACTIVATE: 267 return (EOPNOTSUPP); 268 break; 269 270 case DVACT_DEACTIVATE: 271 sc->sc_dying = 1; 272 break; 273 } 274 return (0); 275 } 276 277 void 278 ucom_shutdown(struct ucom_softc *sc) 279 { 280 struct tty *tp = sc->sc_tty; 281 282 DPRINTF(("ucom_shutdown\n")); 283 /* 284 * Hang up if necessary. Wait a bit, so the other side has time to 285 * notice even if we immediately open the port again. 286 */ 287 if (ISSET(tp->t_cflag, HUPCL)) { 288 ucom_dtr(sc, 0); 289 (void)tsleep(sc, TTIPRI, ttclos, hz); 290 } 291 } 292 293 int 294 ucomopen(dev_t dev, int flag, int mode, usb_proc_ptr p) 295 { 296 int unit = UCOMUNIT(dev); 297 usbd_status err; 298 struct ucom_softc *sc; 299 struct tty *tp; 300 int s; 301 int error; 302 303 if (unit >= ucom_cd.cd_ndevs) 304 return (ENXIO); 305 sc = ucom_cd.cd_devs[unit]; 306 if (sc == NULL) 307 return (ENXIO); 308 309 if (sc->sc_dying) 310 return (EIO); 311 312 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 313 return (ENXIO); 314 315 tp = sc->sc_tty; 316 317 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 318 319 if (ISSET(tp->t_state, TS_ISOPEN) && 320 ISSET(tp->t_state, TS_XCLUDE) && 321 p->p_ucred->cr_uid != 0) 322 return (EBUSY); 323 324 s = spltty(); 325 326 /* 327 * Do the following iff this is a first open. 328 */ 329 while (sc->sc_opening) 330 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 331 332 if (sc->sc_dying) { 333 splx(s); 334 return (EIO); 335 } 336 sc->sc_opening = 1; 337 338 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 339 struct termios t; 340 341 tp->t_dev = dev; 342 343 if (sc->sc_methods->ucom_open != NULL) { 344 error = sc->sc_methods->ucom_open(sc->sc_parent, 345 sc->sc_portno); 346 if (error) { 347 ucom_cleanup(sc); 348 sc->sc_opening = 0; 349 wakeup(&sc->sc_opening); 350 splx(s); 351 return (error); 352 } 353 } 354 355 ucom_status_change(sc); 356 357 /* 358 * Initialize the termios status to the defaults. Add in the 359 * sticky bits from TIOCSFLAGS. 360 */ 361 t.c_ispeed = 0; 362 t.c_ospeed = TTYDEF_SPEED; 363 t.c_cflag = TTYDEF_CFLAG; 364 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 365 SET(t.c_cflag, CLOCAL); 366 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 367 SET(t.c_cflag, CRTSCTS); 368 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 369 SET(t.c_cflag, MDMBUF); 370 /* Make sure ucomparam() will do something. */ 371 tp->t_ospeed = 0; 372 (void) ucomparam(tp, &t); 373 tp->t_iflag = TTYDEF_IFLAG; 374 tp->t_oflag = TTYDEF_OFLAG; 375 tp->t_lflag = TTYDEF_LFLAG; 376 ttychars(tp); 377 ttsetwater(tp); 378 379 /* 380 * Turn on DTR. We must always do this, even if carrier is not 381 * present, because otherwise we'd have to use TIOCSDTR 382 * immediately after setting CLOCAL, which applications do not 383 * expect. We always assert DTR while the device is open 384 * unless explicitly requested to deassert it. 385 */ 386 ucom_dtr(sc, 1); 387 388 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 389 ucom_hwiflow(sc); 390 391 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 392 sc->sc_bulkin_no, sc->sc_bulkout_no)); 393 394 /* Open the bulk pipes */ 395 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 396 &sc->sc_bulkin_pipe); 397 if (err) { 398 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 399 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 400 usbd_errstr(err))); 401 error = EIO; 402 goto fail_0; 403 } 404 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 405 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 406 if (err) { 407 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 408 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 409 usbd_errstr(err))); 410 error = EIO; 411 goto fail_1; 412 } 413 414 /* Allocate a request and an input buffer and start reading. */ 415 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 416 if (sc->sc_ixfer == NULL) { 417 error = ENOMEM; 418 goto fail_2; 419 } 420 421 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 422 sc->sc_ibufsizepad); 423 if (sc->sc_ibuf == NULL) { 424 error = ENOMEM; 425 goto fail_3; 426 } 427 428 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 429 if (sc->sc_oxfer == NULL) { 430 error = ENOMEM; 431 goto fail_3; 432 } 433 434 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 435 sc->sc_obufsize + 436 sc->sc_opkthdrlen); 437 if (sc->sc_obuf == NULL) { 438 error = ENOMEM; 439 goto fail_4; 440 } 441 442 ucomstartread(sc); 443 } 444 sc->sc_opening = 0; 445 wakeup(&sc->sc_opening); 446 splx(s); 447 448 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 449 if (error) 450 goto bad; 451 452 error = (*tp->t_linesw->l_open)(dev, tp); 453 if (error) 454 goto bad; 455 456 return (0); 457 458 fail_4: 459 usbd_free_xfer(sc->sc_oxfer); 460 sc->sc_oxfer = NULL; 461 fail_3: 462 usbd_free_xfer(sc->sc_ixfer); 463 sc->sc_ixfer = NULL; 464 fail_2: 465 usbd_close_pipe(sc->sc_bulkout_pipe); 466 sc->sc_bulkout_pipe = NULL; 467 fail_1: 468 usbd_close_pipe(sc->sc_bulkin_pipe); 469 sc->sc_bulkin_pipe = NULL; 470 fail_0: 471 sc->sc_opening = 0; 472 wakeup(&sc->sc_opening); 473 splx(s); 474 return (error); 475 476 bad: 477 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 478 /* 479 * We failed to open the device, and nobody else had it opened. 480 * Clean up the state as appropriate. 481 */ 482 ucom_cleanup(sc); 483 } 484 485 return (error); 486 } 487 488 int 489 ucomclose(dev_t dev, int flag, int mode, usb_proc_ptr p) 490 { 491 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 492 struct tty *tp = sc->sc_tty; 493 494 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 495 if (!ISSET(tp->t_state, TS_ISOPEN)) 496 return (0); 497 498 sc->sc_refcnt++; 499 500 (*tp->t_linesw->l_close)(tp, flag); 501 ttyclose(tp); 502 503 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 504 /* 505 * Although we got a last close, the device may still be in 506 * use; e.g. if this was the dialout node, and there are still 507 * processes waiting for carrier on the non-dialout node. 508 */ 509 ucom_cleanup(sc); 510 } 511 512 if (sc->sc_methods->ucom_close != NULL) 513 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 514 515 if (--sc->sc_refcnt < 0) 516 usb_detach_wakeup(USBDEV(sc->sc_dev)); 517 518 return (0); 519 } 520 521 int 522 ucomread(dev_t dev, struct uio *uio, int flag) 523 { 524 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 525 struct tty *tp = sc->sc_tty; 526 int error; 527 528 if (sc->sc_dying) 529 return (EIO); 530 531 sc->sc_refcnt++; 532 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 533 if (--sc->sc_refcnt < 0) 534 usb_detach_wakeup(USBDEV(sc->sc_dev)); 535 return (error); 536 } 537 538 int 539 ucomwrite(dev_t dev, struct uio *uio, int flag) 540 { 541 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 542 struct tty *tp = sc->sc_tty; 543 int error; 544 545 if (sc->sc_dying) 546 return (EIO); 547 548 sc->sc_refcnt++; 549 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 550 if (--sc->sc_refcnt < 0) 551 usb_detach_wakeup(USBDEV(sc->sc_dev)); 552 return (error); 553 } 554 555 int 556 ucompoll(dev_t dev, int events, usb_proc_ptr p) 557 { 558 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 559 struct tty *tp = sc->sc_tty; 560 int error; 561 562 if (sc->sc_dying) 563 return (EIO); 564 565 sc->sc_refcnt++; 566 error = ((*tp->t_linesw->l_poll)(tp, events, p)); 567 if (--sc->sc_refcnt < 0) 568 usb_detach_wakeup(USBDEV(sc->sc_dev)); 569 return (error); 570 } 571 572 struct tty * 573 ucomtty(dev_t dev) 574 { 575 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 576 struct tty *tp = sc->sc_tty; 577 578 return (tp); 579 } 580 581 int 582 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, usb_proc_ptr p) 583 { 584 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 585 int error; 586 587 sc->sc_refcnt++; 588 error = ucom_do_ioctl(sc, cmd, data, flag, p); 589 if (--sc->sc_refcnt < 0) 590 usb_detach_wakeup(USBDEV(sc->sc_dev)); 591 return (error); 592 } 593 594 Static int 595 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 596 int flag, usb_proc_ptr p) 597 { 598 struct tty *tp = sc->sc_tty; 599 int error; 600 int s; 601 602 if (sc->sc_dying) 603 return (EIO); 604 605 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 606 607 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 608 if (error != EPASSTHROUGH) 609 return (error); 610 611 error = ttioctl(tp, cmd, data, flag, p); 612 if (error != EPASSTHROUGH) 613 return (error); 614 615 if (sc->sc_methods->ucom_ioctl != NULL) { 616 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 617 sc->sc_portno, cmd, data, flag, p); 618 if (error != EPASSTHROUGH) 619 return (error); 620 } 621 622 error = 0; 623 624 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 625 s = spltty(); 626 627 switch (cmd) { 628 case TIOCSBRK: 629 ucom_break(sc, 1); 630 break; 631 632 case TIOCCBRK: 633 ucom_break(sc, 0); 634 break; 635 636 case TIOCSDTR: 637 ucom_dtr(sc, 1); 638 break; 639 640 case TIOCCDTR: 641 ucom_dtr(sc, 0); 642 break; 643 644 case TIOCGFLAGS: 645 *(int *)data = sc->sc_swflags; 646 break; 647 648 case TIOCSFLAGS: 649 error = suser(p->p_ucred, &p->p_acflag); 650 if (error) 651 break; 652 sc->sc_swflags = *(int *)data; 653 break; 654 655 case TIOCMSET: 656 case TIOCMBIS: 657 case TIOCMBIC: 658 tiocm_to_ucom(sc, cmd, *(int *)data); 659 break; 660 661 case TIOCMGET: 662 *(int *)data = ucom_to_tiocm(sc); 663 break; 664 665 default: 666 error = EPASSTHROUGH; 667 break; 668 } 669 670 splx(s); 671 672 return (error); 673 } 674 675 Static void 676 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 677 { 678 u_char combits; 679 680 combits = 0; 681 if (ISSET(ttybits, TIOCM_DTR)) 682 SET(combits, UMCR_DTR); 683 if (ISSET(ttybits, TIOCM_RTS)) 684 SET(combits, UMCR_RTS); 685 686 switch (how) { 687 case TIOCMBIC: 688 CLR(sc->sc_mcr, combits); 689 break; 690 691 case TIOCMBIS: 692 SET(sc->sc_mcr, combits); 693 break; 694 695 case TIOCMSET: 696 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 697 SET(sc->sc_mcr, combits); 698 break; 699 } 700 701 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 702 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 703 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 704 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 705 } 706 707 Static int 708 ucom_to_tiocm(struct ucom_softc *sc) 709 { 710 u_char combits; 711 int ttybits = 0; 712 713 combits = sc->sc_mcr; 714 if (ISSET(combits, UMCR_DTR)) 715 SET(ttybits, TIOCM_DTR); 716 if (ISSET(combits, UMCR_RTS)) 717 SET(ttybits, TIOCM_RTS); 718 719 combits = sc->sc_msr; 720 if (ISSET(combits, UMSR_DCD)) 721 SET(ttybits, TIOCM_CD); 722 if (ISSET(combits, UMSR_CTS)) 723 SET(ttybits, TIOCM_CTS); 724 if (ISSET(combits, UMSR_DSR)) 725 SET(ttybits, TIOCM_DSR); 726 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 727 SET(ttybits, TIOCM_RI); 728 729 #if 0 730 XXX; 731 if (sc->sc_ier != 0) 732 SET(ttybits, TIOCM_LE); 733 #endif 734 735 return (ttybits); 736 } 737 738 Static void 739 ucom_break(sc, onoff) 740 struct ucom_softc *sc; 741 int onoff; 742 { 743 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 744 745 if (sc->sc_methods->ucom_set != NULL) 746 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 747 UCOM_SET_BREAK, onoff); 748 } 749 750 Static void 751 ucom_dtr(struct ucom_softc *sc, int onoff) 752 { 753 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 754 755 if (sc->sc_methods->ucom_set != NULL) 756 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 757 UCOM_SET_DTR, onoff); 758 } 759 760 Static void 761 ucom_rts(struct ucom_softc *sc, int onoff) 762 { 763 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 764 765 if (sc->sc_methods->ucom_set != NULL) 766 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 767 UCOM_SET_RTS, onoff); 768 } 769 770 void 771 ucom_status_change(struct ucom_softc *sc) 772 { 773 struct tty *tp = sc->sc_tty; 774 u_char old_msr; 775 776 if (sc->sc_methods->ucom_get_status != NULL) { 777 old_msr = sc->sc_msr; 778 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 779 &sc->sc_lsr, &sc->sc_msr); 780 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 781 (*tp->t_linesw->l_modem)(tp, 782 ISSET(sc->sc_msr, UMSR_DCD)); 783 } else { 784 sc->sc_lsr = 0; 785 sc->sc_msr = 0; 786 } 787 } 788 789 Static int 790 ucomparam(struct tty *tp, struct termios *t) 791 { 792 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 793 int error; 794 795 if (sc->sc_dying) 796 return (EIO); 797 798 /* Check requested parameters. */ 799 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 800 return (EINVAL); 801 802 /* 803 * For the console, always force CLOCAL and !HUPCL, so that the port 804 * is always active. 805 */ 806 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 807 SET(t->c_cflag, CLOCAL); 808 CLR(t->c_cflag, HUPCL); 809 } 810 811 /* 812 * If there were no changes, don't do anything. This avoids dropping 813 * input and improves performance when all we did was frob things like 814 * VMIN and VTIME. 815 */ 816 if (tp->t_ospeed == t->c_ospeed && 817 tp->t_cflag == t->c_cflag) 818 return (0); 819 820 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 821 822 /* And copy to tty. */ 823 tp->t_ispeed = 0; 824 tp->t_ospeed = t->c_ospeed; 825 tp->t_cflag = t->c_cflag; 826 827 if (sc->sc_methods->ucom_param != NULL) { 828 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 829 t); 830 if (error) 831 return (error); 832 } 833 834 /* XXX worry about CHWFLOW */ 835 836 /* 837 * Update the tty layer's idea of the carrier bit, in case we changed 838 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 839 * explicit request. 840 */ 841 DPRINTF(("ucomparam: l_modem\n")); 842 (void) (*tp->t_linesw->l_modem)(tp, 1 /* XXX carrier */ ); 843 844 #if 0 845 XXX what if the hardware is not open 846 if (!ISSET(t->c_cflag, CHWFLOW)) { 847 if (sc->sc_tx_stopped) { 848 sc->sc_tx_stopped = 0; 849 ucomstart(tp); 850 } 851 } 852 #endif 853 854 return (0); 855 } 856 857 /* 858 * (un)block input via hw flowcontrol 859 */ 860 Static void 861 ucom_hwiflow(struct ucom_softc *sc) 862 { 863 DPRINTF(("ucom_hwiflow:\n")); 864 #if 0 865 XXX 866 bus_space_tag_t iot = sc->sc_iot; 867 bus_space_handle_t ioh = sc->sc_ioh; 868 869 if (sc->sc_mcr_rts == 0) 870 return; 871 872 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 873 CLR(sc->sc_mcr, sc->sc_mcr_rts); 874 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 875 } else { 876 SET(sc->sc_mcr, sc->sc_mcr_rts); 877 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 878 } 879 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 880 #endif 881 } 882 883 Static void 884 ucomstart(struct tty *tp) 885 { 886 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 887 usbd_status err; 888 int s; 889 u_char *data; 890 int cnt; 891 892 if (sc->sc_dying) 893 return; 894 895 s = spltty(); 896 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 897 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 898 goto out; 899 } 900 if (sc->sc_tx_stopped) 901 goto out; 902 903 if (tp->t_outq.c_cc <= tp->t_lowat) { 904 if (ISSET(tp->t_state, TS_ASLEEP)) { 905 CLR(tp->t_state, TS_ASLEEP); 906 wakeup(&tp->t_outq); 907 } 908 selwakeup(&tp->t_wsel); 909 if (tp->t_outq.c_cc == 0) 910 goto out; 911 } 912 913 /* Grab the first contiguous region of buffer space. */ 914 data = tp->t_outq.c_cf; 915 cnt = ndqb(&tp->t_outq, 0); 916 917 if (cnt == 0) { 918 DPRINTF(("ucomstart: cnt==0\n")); 919 goto out; 920 } 921 922 SET(tp->t_state, TS_BUSY); 923 924 if (cnt > sc->sc_obufsize) { 925 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 926 cnt = sc->sc_obufsize; 927 } 928 if (sc->sc_methods->ucom_write != NULL) 929 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 930 sc->sc_obuf, data, &cnt); 931 else 932 memcpy(sc->sc_obuf, data, cnt); 933 934 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 935 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 936 (usbd_private_handle)sc, sc->sc_obuf, cnt, 937 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 938 /* What can we do on error? */ 939 err = usbd_transfer(sc->sc_oxfer); 940 #ifdef DIAGNOSTIC 941 if (err != USBD_IN_PROGRESS) 942 printf("ucomstart: err=%s\n", usbd_errstr(err)); 943 #endif 944 945 out: 946 splx(s); 947 } 948 949 void 950 ucomstop(struct tty *tp, int flag) 951 { 952 DPRINTF(("ucomstop: flag=%d\n", flag)); 953 #if 0 954 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 955 int s; 956 957 s = spltty(); 958 if (ISSET(tp->t_state, TS_BUSY)) { 959 DPRINTF(("ucomstop: XXX\n")); 960 /* sc->sc_tx_stopped = 1; */ 961 if (!ISSET(tp->t_state, TS_TTSTOP)) 962 SET(tp->t_state, TS_FLUSH); 963 } 964 splx(s); 965 #endif 966 } 967 968 Static void 969 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 970 { 971 struct ucom_softc *sc = (struct ucom_softc *)p; 972 struct tty *tp = sc->sc_tty; 973 u_int32_t cc; 974 int s; 975 976 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 977 978 if (status == USBD_CANCELLED || sc->sc_dying) 979 goto error; 980 981 if (status) { 982 DPRINTF(("ucomwritecb: status=%d\n", status)); 983 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 984 /* XXX we should restart after some delay. */ 985 goto error; 986 } 987 988 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 989 #if defined(__NetBSD__) && NRND > 0 990 rnd_add_uint32(&sc->sc_rndsource, cc); 991 #endif 992 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 993 /* convert from USB bytes to tty bytes */ 994 cc -= sc->sc_opkthdrlen; 995 996 s = spltty(); 997 CLR(tp->t_state, TS_BUSY); 998 if (ISSET(tp->t_state, TS_FLUSH)) 999 CLR(tp->t_state, TS_FLUSH); 1000 else 1001 ndflush(&tp->t_outq, cc); 1002 (*tp->t_linesw->l_start)(tp); 1003 splx(s); 1004 return; 1005 1006 error: 1007 s = spltty(); 1008 CLR(tp->t_state, TS_BUSY); 1009 splx(s); 1010 } 1011 1012 Static usbd_status 1013 ucomstartread(struct ucom_softc *sc) 1014 { 1015 usbd_status err; 1016 1017 DPRINTFN(5,("ucomstartread: start\n")); 1018 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1019 (usbd_private_handle)sc, 1020 sc->sc_ibuf, sc->sc_ibufsize, 1021 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1022 USBD_NO_TIMEOUT, ucomreadcb); 1023 err = usbd_transfer(sc->sc_ixfer); 1024 if (err != USBD_IN_PROGRESS) { 1025 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1026 return (err); 1027 } 1028 return (USBD_NORMAL_COMPLETION); 1029 } 1030 1031 Static void 1032 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1033 { 1034 struct ucom_softc *sc = (struct ucom_softc *)p; 1035 struct tty *tp = sc->sc_tty; 1036 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1037 usbd_status err; 1038 u_int32_t cc; 1039 u_char *cp; 1040 int s; 1041 1042 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1043 1044 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1045 sc->sc_dying) { 1046 DPRINTF(("ucomreadcb: dying\n")); 1047 /* Send something to wake upper layer */ 1048 s = spltty(); 1049 (*rint)('\n', tp); 1050 ttwakeup(tp); 1051 splx(s); 1052 return; 1053 } 1054 1055 if (status) { 1056 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1057 /* XXX we should restart after some delay. */ 1058 return; 1059 } 1060 1061 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 1062 #if defined(__NetBSD__) && NRND > 0 1063 rnd_add_uint32(&sc->sc_rndsource, cc); 1064 #endif 1065 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1066 if (sc->sc_methods->ucom_read != NULL) 1067 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1068 &cp, &cc); 1069 1070 s = spltty(); 1071 /* Give characters to tty layer. */ 1072 while (cc-- > 0) { 1073 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1074 if ((*rint)(*cp++, tp) == -1) { 1075 /* XXX what should we do? */ 1076 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1077 cc); 1078 break; 1079 } 1080 } 1081 splx(s); 1082 1083 err = ucomstartread(sc); 1084 if (err) { 1085 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1086 /* XXX what should we dow now? */ 1087 } 1088 } 1089 1090 Static void 1091 ucom_cleanup(struct ucom_softc *sc) 1092 { 1093 DPRINTF(("ucom_cleanup: closing pipes\n")); 1094 1095 ucom_shutdown(sc); 1096 if (sc->sc_bulkin_pipe != NULL) { 1097 usbd_abort_pipe(sc->sc_bulkin_pipe); 1098 usbd_close_pipe(sc->sc_bulkin_pipe); 1099 sc->sc_bulkin_pipe = NULL; 1100 } 1101 if (sc->sc_bulkout_pipe != NULL) { 1102 usbd_abort_pipe(sc->sc_bulkout_pipe); 1103 usbd_close_pipe(sc->sc_bulkout_pipe); 1104 sc->sc_bulkout_pipe = NULL; 1105 } 1106 if (sc->sc_ixfer != NULL) { 1107 usbd_free_xfer(sc->sc_ixfer); 1108 sc->sc_ixfer = NULL; 1109 } 1110 if (sc->sc_oxfer != NULL) { 1111 usbd_free_xfer(sc->sc_oxfer); 1112 sc->sc_oxfer = NULL; 1113 } 1114 } 1115 1116 #endif /* NUCOM > 0 */ 1117 1118 int 1119 ucomprint(void *aux, const char *pnp) 1120 { 1121 struct ucom_attach_args *uca = aux; 1122 1123 if (pnp) 1124 printf("ucom at %s", pnp); 1125 if (uca->portno != UCOM_UNK_PORTNO) 1126 printf(" portno %d", uca->portno); 1127 return (UNCONF); 1128 } 1129 1130 int 1131 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1132 { 1133 struct ucom_attach_args *uca = aux; 1134 1135 if (uca->portno != UCOM_UNK_PORTNO && 1136 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1137 cf->ucomcf_portno != uca->portno) 1138 return (0); 1139 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1140 } 1141