ucom.c revision 1.42.4.2
1 /* $NetBSD: ucom.c,v 1.42.4.2 2002/07/15 10:36:04 gehenna 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 (at) 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 1.42.4.2 2002/07/15 10:36:04 gehenna 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 dev_type_open(ucomopen); 137 dev_type_close(ucomclose); 138 dev_type_read(ucomread); 139 dev_type_write(ucomwrite); 140 dev_type_ioctl(ucomioctl); 141 dev_type_stop(ucomstop); 142 dev_type_tty(ucomtty); 143 dev_type_poll(ucompoll); 144 145 const struct cdevsw ucom_cdevsw = { 146 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 147 ucomstop, ucomtty, ucompoll, nommap, D_TTY 148 }; 149 150 Static void ucom_cleanup(struct ucom_softc *); 151 Static void ucom_hwiflow(struct ucom_softc *); 152 Static int ucomparam(struct tty *, struct termios *); 153 Static void ucomstart(struct tty *); 154 Static void ucom_shutdown(struct ucom_softc *); 155 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 156 int, usb_proc_ptr); 157 Static void ucom_dtr(struct ucom_softc *, int); 158 Static void ucom_rts(struct ucom_softc *, int); 159 Static void ucom_break(struct ucom_softc *, int); 160 Static usbd_status ucomstartread(struct ucom_softc *); 161 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 162 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 163 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 164 Static int ucom_to_tiocm(struct ucom_softc *); 165 166 USB_DECLARE_DRIVER(ucom); 167 168 USB_MATCH(ucom) 169 { 170 return (1); 171 } 172 173 USB_ATTACH(ucom) 174 { 175 struct ucom_softc *sc = (struct ucom_softc *)self; 176 struct ucom_attach_args *uca = aux; 177 struct tty *tp; 178 179 if (uca->portno != UCOM_UNK_PORTNO) 180 printf(": portno %d", uca->portno); 181 if (uca->info != NULL) 182 printf(", %s", uca->info); 183 printf("\n"); 184 185 sc->sc_udev = uca->device; 186 sc->sc_iface = uca->iface; 187 sc->sc_bulkout_no = uca->bulkout; 188 sc->sc_bulkin_no = uca->bulkin; 189 sc->sc_ibufsize = uca->ibufsize; 190 sc->sc_ibufsizepad = uca->ibufsizepad; 191 sc->sc_obufsize = uca->obufsize; 192 sc->sc_opkthdrlen = uca->opkthdrlen; 193 sc->sc_methods = uca->methods; 194 sc->sc_parent = uca->arg; 195 sc->sc_portno = uca->portno; 196 197 tp = ttymalloc(); 198 tp->t_oproc = ucomstart; 199 tp->t_param = ucomparam; 200 sc->sc_tty = tp; 201 202 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 203 tty_attach(tp); 204 205 #if defined(__NetBSD__) && NRND > 0 206 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 207 RND_TYPE_TTY, 0); 208 #endif 209 210 USB_ATTACH_SUCCESS_RETURN; 211 } 212 213 USB_DETACH(ucom) 214 { 215 struct ucom_softc *sc = (struct ucom_softc *)self; 216 struct tty *tp = sc->sc_tty; 217 int maj, mn; 218 int s; 219 220 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 221 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 222 223 sc->sc_dying = 1; 224 225 if (sc->sc_bulkin_pipe != NULL) 226 usbd_abort_pipe(sc->sc_bulkin_pipe); 227 if (sc->sc_bulkout_pipe != NULL) 228 usbd_abort_pipe(sc->sc_bulkout_pipe); 229 230 s = splusb(); 231 if (--sc->sc_refcnt >= 0) { 232 /* Wake up anyone waiting */ 233 if (tp != NULL) { 234 CLR(tp->t_state, TS_CARR_ON); 235 CLR(tp->t_cflag, CLOCAL | MDMBUF); 236 ttyflush(tp, FREAD|FWRITE); 237 } 238 /* Wait for processes to go away. */ 239 usb_detach_wait(USBDEV(sc->sc_dev)); 240 } 241 splx(s); 242 243 /* locate the major number */ 244 maj = cdevsw_lookup_major(&ucom_cdevsw); 245 246 /* Nuke the vnodes for any open instances. */ 247 mn = self->dv_unit; 248 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 249 vdevgone(maj, mn, mn, VCHR); 250 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 251 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 252 253 /* Detach and free the tty. */ 254 if (tp != NULL) { 255 tty_detach(tp); 256 ttyfree(tp); 257 sc->sc_tty = NULL; 258 } 259 260 /* Detach the random source */ 261 #if defined(__NetBSD__) && NRND > 0 262 rnd_detach_source(&sc->sc_rndsource); 263 #endif 264 265 return (0); 266 } 267 268 int 269 ucom_activate(device_ptr_t self, enum devact act) 270 { 271 struct ucom_softc *sc = (struct ucom_softc *)self; 272 273 DPRINTFN(5,("ucom_activate: %d\n", act)); 274 275 switch (act) { 276 case DVACT_ACTIVATE: 277 return (EOPNOTSUPP); 278 break; 279 280 case DVACT_DEACTIVATE: 281 sc->sc_dying = 1; 282 break; 283 } 284 return (0); 285 } 286 287 void 288 ucom_shutdown(struct ucom_softc *sc) 289 { 290 struct tty *tp = sc->sc_tty; 291 292 DPRINTF(("ucom_shutdown\n")); 293 /* 294 * Hang up if necessary. Wait a bit, so the other side has time to 295 * notice even if we immediately open the port again. 296 */ 297 if (ISSET(tp->t_cflag, HUPCL)) { 298 ucom_dtr(sc, 0); 299 (void)tsleep(sc, TTIPRI, ttclos, hz); 300 } 301 } 302 303 int 304 ucomopen(dev_t dev, int flag, int mode, usb_proc_ptr p) 305 { 306 int unit = UCOMUNIT(dev); 307 usbd_status err; 308 struct ucom_softc *sc; 309 struct tty *tp; 310 int s; 311 int error; 312 313 if (unit >= ucom_cd.cd_ndevs) 314 return (ENXIO); 315 sc = ucom_cd.cd_devs[unit]; 316 if (sc == NULL) 317 return (ENXIO); 318 319 if (sc->sc_dying) 320 return (EIO); 321 322 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 323 return (ENXIO); 324 325 tp = sc->sc_tty; 326 327 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 328 329 if (ISSET(tp->t_state, TS_ISOPEN) && 330 ISSET(tp->t_state, TS_XCLUDE) && 331 p->p_ucred->cr_uid != 0) 332 return (EBUSY); 333 334 s = spltty(); 335 336 /* 337 * Do the following iff this is a first open. 338 */ 339 while (sc->sc_opening) 340 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 341 342 if (sc->sc_dying) { 343 splx(s); 344 return (EIO); 345 } 346 sc->sc_opening = 1; 347 348 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 349 struct termios t; 350 351 tp->t_dev = dev; 352 353 if (sc->sc_methods->ucom_open != NULL) { 354 error = sc->sc_methods->ucom_open(sc->sc_parent, 355 sc->sc_portno); 356 if (error) { 357 ucom_cleanup(sc); 358 sc->sc_opening = 0; 359 wakeup(&sc->sc_opening); 360 splx(s); 361 return (error); 362 } 363 } 364 365 ucom_status_change(sc); 366 367 /* 368 * Initialize the termios status to the defaults. Add in the 369 * sticky bits from TIOCSFLAGS. 370 */ 371 t.c_ispeed = 0; 372 t.c_ospeed = TTYDEF_SPEED; 373 t.c_cflag = TTYDEF_CFLAG; 374 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 375 SET(t.c_cflag, CLOCAL); 376 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 377 SET(t.c_cflag, CRTSCTS); 378 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 379 SET(t.c_cflag, MDMBUF); 380 /* Make sure ucomparam() will do something. */ 381 tp->t_ospeed = 0; 382 (void) ucomparam(tp, &t); 383 tp->t_iflag = TTYDEF_IFLAG; 384 tp->t_oflag = TTYDEF_OFLAG; 385 tp->t_lflag = TTYDEF_LFLAG; 386 ttychars(tp); 387 ttsetwater(tp); 388 389 /* 390 * Turn on DTR. We must always do this, even if carrier is not 391 * present, because otherwise we'd have to use TIOCSDTR 392 * immediately after setting CLOCAL, which applications do not 393 * expect. We always assert DTR while the device is open 394 * unless explicitly requested to deassert it. 395 */ 396 ucom_dtr(sc, 1); 397 398 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 399 ucom_hwiflow(sc); 400 401 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 402 sc->sc_bulkin_no, sc->sc_bulkout_no)); 403 404 /* Open the bulk pipes */ 405 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 406 &sc->sc_bulkin_pipe); 407 if (err) { 408 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 409 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 410 usbd_errstr(err))); 411 error = EIO; 412 goto fail_0; 413 } 414 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 415 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 416 if (err) { 417 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 418 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 419 usbd_errstr(err))); 420 error = EIO; 421 goto fail_1; 422 } 423 424 /* Allocate a request and an input buffer and start reading. */ 425 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 426 if (sc->sc_ixfer == NULL) { 427 error = ENOMEM; 428 goto fail_2; 429 } 430 431 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 432 sc->sc_ibufsizepad); 433 if (sc->sc_ibuf == NULL) { 434 error = ENOMEM; 435 goto fail_3; 436 } 437 438 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 439 if (sc->sc_oxfer == NULL) { 440 error = ENOMEM; 441 goto fail_3; 442 } 443 444 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 445 sc->sc_obufsize + 446 sc->sc_opkthdrlen); 447 if (sc->sc_obuf == NULL) { 448 error = ENOMEM; 449 goto fail_4; 450 } 451 452 ucomstartread(sc); 453 } 454 sc->sc_opening = 0; 455 wakeup(&sc->sc_opening); 456 splx(s); 457 458 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 459 if (error) 460 goto bad; 461 462 error = (*tp->t_linesw->l_open)(dev, tp); 463 if (error) 464 goto bad; 465 466 return (0); 467 468 fail_4: 469 usbd_free_xfer(sc->sc_oxfer); 470 sc->sc_oxfer = NULL; 471 fail_3: 472 usbd_free_xfer(sc->sc_ixfer); 473 sc->sc_ixfer = NULL; 474 fail_2: 475 usbd_close_pipe(sc->sc_bulkout_pipe); 476 sc->sc_bulkout_pipe = NULL; 477 fail_1: 478 usbd_close_pipe(sc->sc_bulkin_pipe); 479 sc->sc_bulkin_pipe = NULL; 480 fail_0: 481 sc->sc_opening = 0; 482 wakeup(&sc->sc_opening); 483 splx(s); 484 return (error); 485 486 bad: 487 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 488 /* 489 * We failed to open the device, and nobody else had it opened. 490 * Clean up the state as appropriate. 491 */ 492 ucom_cleanup(sc); 493 } 494 495 return (error); 496 } 497 498 int 499 ucomclose(dev_t dev, int flag, int mode, usb_proc_ptr p) 500 { 501 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 502 struct tty *tp = sc->sc_tty; 503 504 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 505 if (!ISSET(tp->t_state, TS_ISOPEN)) 506 return (0); 507 508 sc->sc_refcnt++; 509 510 (*tp->t_linesw->l_close)(tp, flag); 511 ttyclose(tp); 512 513 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 514 /* 515 * Although we got a last close, the device may still be in 516 * use; e.g. if this was the dialout node, and there are still 517 * processes waiting for carrier on the non-dialout node. 518 */ 519 ucom_cleanup(sc); 520 } 521 522 if (sc->sc_methods->ucom_close != NULL) 523 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 524 525 if (--sc->sc_refcnt < 0) 526 usb_detach_wakeup(USBDEV(sc->sc_dev)); 527 528 return (0); 529 } 530 531 int 532 ucomread(dev_t dev, struct uio *uio, int flag) 533 { 534 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 535 struct tty *tp = sc->sc_tty; 536 int error; 537 538 if (sc->sc_dying) 539 return (EIO); 540 541 sc->sc_refcnt++; 542 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 543 if (--sc->sc_refcnt < 0) 544 usb_detach_wakeup(USBDEV(sc->sc_dev)); 545 return (error); 546 } 547 548 int 549 ucomwrite(dev_t dev, struct uio *uio, int flag) 550 { 551 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 552 struct tty *tp = sc->sc_tty; 553 int error; 554 555 if (sc->sc_dying) 556 return (EIO); 557 558 sc->sc_refcnt++; 559 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 560 if (--sc->sc_refcnt < 0) 561 usb_detach_wakeup(USBDEV(sc->sc_dev)); 562 return (error); 563 } 564 565 int 566 ucompoll(dev_t dev, int events, usb_proc_ptr p) 567 { 568 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 569 struct tty *tp = sc->sc_tty; 570 int error; 571 572 if (sc->sc_dying) 573 return (EIO); 574 575 sc->sc_refcnt++; 576 error = ((*tp->t_linesw->l_poll)(tp, events, p)); 577 if (--sc->sc_refcnt < 0) 578 usb_detach_wakeup(USBDEV(sc->sc_dev)); 579 return (error); 580 } 581 582 struct tty * 583 ucomtty(dev_t dev) 584 { 585 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 586 struct tty *tp = sc->sc_tty; 587 588 return (tp); 589 } 590 591 int 592 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, usb_proc_ptr p) 593 { 594 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 595 int error; 596 597 sc->sc_refcnt++; 598 error = ucom_do_ioctl(sc, cmd, data, flag, p); 599 if (--sc->sc_refcnt < 0) 600 usb_detach_wakeup(USBDEV(sc->sc_dev)); 601 return (error); 602 } 603 604 Static int 605 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 606 int flag, usb_proc_ptr p) 607 { 608 struct tty *tp = sc->sc_tty; 609 int error; 610 int s; 611 612 if (sc->sc_dying) 613 return (EIO); 614 615 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 616 617 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 618 if (error != EPASSTHROUGH) 619 return (error); 620 621 error = ttioctl(tp, cmd, data, flag, p); 622 if (error != EPASSTHROUGH) 623 return (error); 624 625 if (sc->sc_methods->ucom_ioctl != NULL) { 626 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 627 sc->sc_portno, cmd, data, flag, p); 628 if (error != EPASSTHROUGH) 629 return (error); 630 } 631 632 error = 0; 633 634 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 635 s = spltty(); 636 637 switch (cmd) { 638 case TIOCSBRK: 639 ucom_break(sc, 1); 640 break; 641 642 case TIOCCBRK: 643 ucom_break(sc, 0); 644 break; 645 646 case TIOCSDTR: 647 ucom_dtr(sc, 1); 648 break; 649 650 case TIOCCDTR: 651 ucom_dtr(sc, 0); 652 break; 653 654 case TIOCGFLAGS: 655 *(int *)data = sc->sc_swflags; 656 break; 657 658 case TIOCSFLAGS: 659 error = suser(p->p_ucred, &p->p_acflag); 660 if (error) 661 break; 662 sc->sc_swflags = *(int *)data; 663 break; 664 665 case TIOCMSET: 666 case TIOCMBIS: 667 case TIOCMBIC: 668 tiocm_to_ucom(sc, cmd, *(int *)data); 669 break; 670 671 case TIOCMGET: 672 *(int *)data = ucom_to_tiocm(sc); 673 break; 674 675 default: 676 error = EPASSTHROUGH; 677 break; 678 } 679 680 splx(s); 681 682 return (error); 683 } 684 685 Static void 686 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 687 { 688 u_char combits; 689 690 combits = 0; 691 if (ISSET(ttybits, TIOCM_DTR)) 692 SET(combits, UMCR_DTR); 693 if (ISSET(ttybits, TIOCM_RTS)) 694 SET(combits, UMCR_RTS); 695 696 switch (how) { 697 case TIOCMBIC: 698 CLR(sc->sc_mcr, combits); 699 break; 700 701 case TIOCMBIS: 702 SET(sc->sc_mcr, combits); 703 break; 704 705 case TIOCMSET: 706 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 707 SET(sc->sc_mcr, combits); 708 break; 709 } 710 711 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 712 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 713 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 714 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 715 } 716 717 Static int 718 ucom_to_tiocm(struct ucom_softc *sc) 719 { 720 u_char combits; 721 int ttybits = 0; 722 723 combits = sc->sc_mcr; 724 if (ISSET(combits, UMCR_DTR)) 725 SET(ttybits, TIOCM_DTR); 726 if (ISSET(combits, UMCR_RTS)) 727 SET(ttybits, TIOCM_RTS); 728 729 combits = sc->sc_msr; 730 if (ISSET(combits, UMSR_DCD)) 731 SET(ttybits, TIOCM_CD); 732 if (ISSET(combits, UMSR_CTS)) 733 SET(ttybits, TIOCM_CTS); 734 if (ISSET(combits, UMSR_DSR)) 735 SET(ttybits, TIOCM_DSR); 736 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 737 SET(ttybits, TIOCM_RI); 738 739 #if 0 740 XXX; 741 if (sc->sc_ier != 0) 742 SET(ttybits, TIOCM_LE); 743 #endif 744 745 return (ttybits); 746 } 747 748 Static void 749 ucom_break(sc, onoff) 750 struct ucom_softc *sc; 751 int onoff; 752 { 753 DPRINTF(("ucom_break: 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_BREAK, onoff); 758 } 759 760 Static void 761 ucom_dtr(struct ucom_softc *sc, int onoff) 762 { 763 DPRINTF(("ucom_dtr: 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_DTR, onoff); 768 } 769 770 Static void 771 ucom_rts(struct ucom_softc *sc, int onoff) 772 { 773 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 774 775 if (sc->sc_methods->ucom_set != NULL) 776 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 777 UCOM_SET_RTS, onoff); 778 } 779 780 void 781 ucom_status_change(struct ucom_softc *sc) 782 { 783 struct tty *tp = sc->sc_tty; 784 u_char old_msr; 785 786 if (sc->sc_methods->ucom_get_status != NULL) { 787 old_msr = sc->sc_msr; 788 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 789 &sc->sc_lsr, &sc->sc_msr); 790 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 791 (*tp->t_linesw->l_modem)(tp, 792 ISSET(sc->sc_msr, UMSR_DCD)); 793 } else { 794 sc->sc_lsr = 0; 795 sc->sc_msr = 0; 796 } 797 } 798 799 Static int 800 ucomparam(struct tty *tp, struct termios *t) 801 { 802 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 803 int error; 804 805 if (sc->sc_dying) 806 return (EIO); 807 808 /* Check requested parameters. */ 809 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 810 return (EINVAL); 811 812 /* 813 * For the console, always force CLOCAL and !HUPCL, so that the port 814 * is always active. 815 */ 816 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 817 SET(t->c_cflag, CLOCAL); 818 CLR(t->c_cflag, HUPCL); 819 } 820 821 /* 822 * If there were no changes, don't do anything. This avoids dropping 823 * input and improves performance when all we did was frob things like 824 * VMIN and VTIME. 825 */ 826 if (tp->t_ospeed == t->c_ospeed && 827 tp->t_cflag == t->c_cflag) 828 return (0); 829 830 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 831 832 /* And copy to tty. */ 833 tp->t_ispeed = 0; 834 tp->t_ospeed = t->c_ospeed; 835 tp->t_cflag = t->c_cflag; 836 837 if (sc->sc_methods->ucom_param != NULL) { 838 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 839 t); 840 if (error) 841 return (error); 842 } 843 844 /* XXX worry about CHWFLOW */ 845 846 /* 847 * Update the tty layer's idea of the carrier bit, in case we changed 848 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 849 * explicit request. 850 */ 851 DPRINTF(("ucomparam: l_modem\n")); 852 (void) (*tp->t_linesw->l_modem)(tp, 1 /* XXX carrier */ ); 853 854 #if 0 855 XXX what if the hardware is not open 856 if (!ISSET(t->c_cflag, CHWFLOW)) { 857 if (sc->sc_tx_stopped) { 858 sc->sc_tx_stopped = 0; 859 ucomstart(tp); 860 } 861 } 862 #endif 863 864 return (0); 865 } 866 867 /* 868 * (un)block input via hw flowcontrol 869 */ 870 Static void 871 ucom_hwiflow(struct ucom_softc *sc) 872 { 873 DPRINTF(("ucom_hwiflow:\n")); 874 #if 0 875 XXX 876 bus_space_tag_t iot = sc->sc_iot; 877 bus_space_handle_t ioh = sc->sc_ioh; 878 879 if (sc->sc_mcr_rts == 0) 880 return; 881 882 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 883 CLR(sc->sc_mcr, sc->sc_mcr_rts); 884 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 885 } else { 886 SET(sc->sc_mcr, sc->sc_mcr_rts); 887 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 888 } 889 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 890 #endif 891 } 892 893 Static void 894 ucomstart(struct tty *tp) 895 { 896 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 897 usbd_status err; 898 int s; 899 u_char *data; 900 int cnt; 901 902 if (sc->sc_dying) 903 return; 904 905 s = spltty(); 906 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 907 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 908 goto out; 909 } 910 if (sc->sc_tx_stopped) 911 goto out; 912 913 if (tp->t_outq.c_cc <= tp->t_lowat) { 914 if (ISSET(tp->t_state, TS_ASLEEP)) { 915 CLR(tp->t_state, TS_ASLEEP); 916 wakeup(&tp->t_outq); 917 } 918 selwakeup(&tp->t_wsel); 919 if (tp->t_outq.c_cc == 0) 920 goto out; 921 } 922 923 /* Grab the first contiguous region of buffer space. */ 924 data = tp->t_outq.c_cf; 925 cnt = ndqb(&tp->t_outq, 0); 926 927 if (cnt == 0) { 928 DPRINTF(("ucomstart: cnt==0\n")); 929 goto out; 930 } 931 932 SET(tp->t_state, TS_BUSY); 933 934 if (cnt > sc->sc_obufsize) { 935 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 936 cnt = sc->sc_obufsize; 937 } 938 if (sc->sc_methods->ucom_write != NULL) 939 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 940 sc->sc_obuf, data, &cnt); 941 else 942 memcpy(sc->sc_obuf, data, cnt); 943 944 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 945 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 946 (usbd_private_handle)sc, sc->sc_obuf, cnt, 947 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 948 /* What can we do on error? */ 949 err = usbd_transfer(sc->sc_oxfer); 950 #ifdef DIAGNOSTIC 951 if (err != USBD_IN_PROGRESS) 952 printf("ucomstart: err=%s\n", usbd_errstr(err)); 953 #endif 954 955 out: 956 splx(s); 957 } 958 959 void 960 ucomstop(struct tty *tp, int flag) 961 { 962 DPRINTF(("ucomstop: flag=%d\n", flag)); 963 #if 0 964 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 965 int s; 966 967 s = spltty(); 968 if (ISSET(tp->t_state, TS_BUSY)) { 969 DPRINTF(("ucomstop: XXX\n")); 970 /* sc->sc_tx_stopped = 1; */ 971 if (!ISSET(tp->t_state, TS_TTSTOP)) 972 SET(tp->t_state, TS_FLUSH); 973 } 974 splx(s); 975 #endif 976 } 977 978 Static void 979 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 980 { 981 struct ucom_softc *sc = (struct ucom_softc *)p; 982 struct tty *tp = sc->sc_tty; 983 u_int32_t cc; 984 int s; 985 986 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 987 988 if (status == USBD_CANCELLED || sc->sc_dying) 989 goto error; 990 991 if (status) { 992 DPRINTF(("ucomwritecb: status=%d\n", status)); 993 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 994 /* XXX we should restart after some delay. */ 995 goto error; 996 } 997 998 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 999 #if defined(__NetBSD__) && NRND > 0 1000 rnd_add_uint32(&sc->sc_rndsource, cc); 1001 #endif 1002 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 1003 /* convert from USB bytes to tty bytes */ 1004 cc -= sc->sc_opkthdrlen; 1005 1006 s = spltty(); 1007 CLR(tp->t_state, TS_BUSY); 1008 if (ISSET(tp->t_state, TS_FLUSH)) 1009 CLR(tp->t_state, TS_FLUSH); 1010 else 1011 ndflush(&tp->t_outq, cc); 1012 (*tp->t_linesw->l_start)(tp); 1013 splx(s); 1014 return; 1015 1016 error: 1017 s = spltty(); 1018 CLR(tp->t_state, TS_BUSY); 1019 splx(s); 1020 } 1021 1022 Static usbd_status 1023 ucomstartread(struct ucom_softc *sc) 1024 { 1025 usbd_status err; 1026 1027 DPRINTFN(5,("ucomstartread: start\n")); 1028 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1029 (usbd_private_handle)sc, 1030 sc->sc_ibuf, sc->sc_ibufsize, 1031 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1032 USBD_NO_TIMEOUT, ucomreadcb); 1033 err = usbd_transfer(sc->sc_ixfer); 1034 if (err != USBD_IN_PROGRESS) { 1035 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1036 return (err); 1037 } 1038 return (USBD_NORMAL_COMPLETION); 1039 } 1040 1041 Static void 1042 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1043 { 1044 struct ucom_softc *sc = (struct ucom_softc *)p; 1045 struct tty *tp = sc->sc_tty; 1046 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1047 usbd_status err; 1048 u_int32_t cc; 1049 u_char *cp; 1050 int s; 1051 1052 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1053 1054 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1055 sc->sc_dying) { 1056 DPRINTF(("ucomreadcb: dying\n")); 1057 /* Send something to wake upper layer */ 1058 s = spltty(); 1059 (*rint)('\n', tp); 1060 ttwakeup(tp); 1061 splx(s); 1062 return; 1063 } 1064 1065 if (status) { 1066 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1067 /* XXX we should restart after some delay. */ 1068 return; 1069 } 1070 1071 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 1072 #if defined(__NetBSD__) && NRND > 0 1073 rnd_add_uint32(&sc->sc_rndsource, cc); 1074 #endif 1075 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1076 if (sc->sc_methods->ucom_read != NULL) 1077 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1078 &cp, &cc); 1079 1080 s = spltty(); 1081 /* Give characters to tty layer. */ 1082 while (cc-- > 0) { 1083 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1084 if ((*rint)(*cp++, tp) == -1) { 1085 /* XXX what should we do? */ 1086 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1087 cc); 1088 break; 1089 } 1090 } 1091 splx(s); 1092 1093 err = ucomstartread(sc); 1094 if (err) { 1095 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1096 /* XXX what should we dow now? */ 1097 } 1098 } 1099 1100 Static void 1101 ucom_cleanup(struct ucom_softc *sc) 1102 { 1103 DPRINTF(("ucom_cleanup: closing pipes\n")); 1104 1105 ucom_shutdown(sc); 1106 if (sc->sc_bulkin_pipe != NULL) { 1107 usbd_abort_pipe(sc->sc_bulkin_pipe); 1108 usbd_close_pipe(sc->sc_bulkin_pipe); 1109 sc->sc_bulkin_pipe = NULL; 1110 } 1111 if (sc->sc_bulkout_pipe != NULL) { 1112 usbd_abort_pipe(sc->sc_bulkout_pipe); 1113 usbd_close_pipe(sc->sc_bulkout_pipe); 1114 sc->sc_bulkout_pipe = NULL; 1115 } 1116 if (sc->sc_ixfer != NULL) { 1117 usbd_free_xfer(sc->sc_ixfer); 1118 sc->sc_ixfer = NULL; 1119 } 1120 if (sc->sc_oxfer != NULL) { 1121 usbd_free_xfer(sc->sc_oxfer); 1122 sc->sc_oxfer = NULL; 1123 } 1124 } 1125 1126 #endif /* NUCOM > 0 */ 1127 1128 int 1129 ucomprint(void *aux, const char *pnp) 1130 { 1131 struct ucom_attach_args *uca = aux; 1132 1133 if (pnp) 1134 printf("ucom at %s", pnp); 1135 if (uca->portno != UCOM_UNK_PORTNO) 1136 printf(" portno %d", uca->portno); 1137 return (UNCONF); 1138 } 1139 1140 int 1141 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1142 { 1143 struct ucom_attach_args *uca = aux; 1144 1145 if (uca->portno != UCOM_UNK_PORTNO && 1146 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1147 cf->ucomcf_portno != uca->portno) 1148 return (0); 1149 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1150 } 1151
Indexes created Sat Oct 18 23:09:54 GMT 2025