1 /* $OpenBSD: ucom.c,v 1.18 2003/05/19 00:33:00 nate Exp $ */ 2 /* $NetBSD: ucom.c,v 1.49 2003/01/01 00:10:25 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Lennart Augustsson (lennart@augustsson.net) at 10 * Carlstedt Research & Technology. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 /* 41 * This code is very heavily based on the 16550 driver, com.c. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/ioctl.h> 48 #include <sys/conf.h> 49 #include <sys/tty.h> 50 #include <sys/file.h> 51 #include <sys/select.h> 52 #include <sys/proc.h> 53 #include <sys/vnode.h> 54 #include <sys/device.h> 55 #include <sys/poll.h> 56 #if defined(__NetBSD__) 57 #include "rnd.h" 58 #if NRND > 0 59 #include <sys/rnd.h> 60 #endif 61 #endif 62 63 #include <dev/usb/usb.h> 64 65 #include <dev/usb/usbdi.h> 66 #include <dev/usb/usbdi_util.h> 67 #include <dev/usb/usbdevs.h> 68 #include <dev/usb/usb_quirks.h> 69 70 #include <dev/usb/ucomvar.h> 71 72 #include "ucom.h" 73 74 #if NUCOM > 0 75 76 #ifdef UCOM_DEBUG 77 #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x 78 int ucomdebug = 0; 79 #else 80 #define DPRINTFN(n, x) 81 #endif 82 #define DPRINTF(x) DPRINTFN(0, x) 83 84 #if defined(__NetBSD__) 85 #define UCOMUNIT_MASK 0x3ffff 86 #define UCOMDIALOUT_MASK 0x80000 87 #define UCOMCALLUNIT_MASK 0x40000 88 89 #define LINESW(tp, func) ((tp)->t_linesw->func) 90 #endif 91 92 #if defined(__OpenBSD__) 93 #define UCOMUNIT_MASK 0x3f 94 #define UCOMDIALOUT_MASK 0x80 95 #define UCOMCALLUNIT_MASK 0x40 96 97 #define LINESW(tp, func) (linesw[(tp)->t_line].func) 98 #endif 99 100 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) 101 #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) 102 #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) 103 104 struct ucom_softc { 105 USBBASEDEVICE sc_dev; /* base device */ 106 107 usbd_device_handle sc_udev; /* USB device */ 108 109 usbd_interface_handle sc_iface; /* data interface */ 110 111 int sc_bulkin_no; /* bulk in endpoint address */ 112 usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */ 113 usbd_xfer_handle sc_ixfer; /* read request */ 114 u_char *sc_ibuf; /* read buffer */ 115 u_int sc_ibufsize; /* read buffer size */ 116 u_int sc_ibufsizepad; /* read buffer size padded */ 117 118 int sc_bulkout_no; /* bulk out endpoint address */ 119 usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */ 120 usbd_xfer_handle sc_oxfer; /* write request */ 121 u_char *sc_obuf; /* write buffer */ 122 u_int sc_obufsize; /* write buffer size */ 123 u_int sc_opkthdrlen; /* header length of 124 * output packet */ 125 126 struct ucom_methods *sc_methods; 127 void *sc_parent; 128 int sc_portno; 129 130 struct tty *sc_tty; /* our tty */ 131 u_char sc_lsr; 132 u_char sc_msr; 133 u_char sc_mcr; 134 u_char sc_tx_stopped; 135 int sc_swflags; 136 137 u_char sc_opening; /* lock during open */ 138 int sc_refcnt; 139 u_char sc_dying; /* disconnecting */ 140 141 #if defined(__NetBSD__) && NRND > 0 142 rndsource_element_t sc_rndsource; /* random source */ 143 #endif 144 }; 145 146 #if defined(__NetBSD__) 147 dev_type_open(ucomopen); 148 dev_type_close(ucomclose); 149 dev_type_read(ucomread); 150 dev_type_write(ucomwrite); 151 dev_type_ioctl(ucomioctl); 152 dev_type_stop(ucomstop); 153 dev_type_tty(ucomtty); 154 dev_type_poll(ucompoll); 155 156 const struct cdevsw ucom_cdevsw = { 157 ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl, 158 ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY 159 }; 160 #endif 161 162 Static void ucom_cleanup(struct ucom_softc *); 163 Static void ucom_hwiflow(struct ucom_softc *); 164 Static int ucomparam(struct tty *, struct termios *); 165 Static void ucomstart(struct tty *); 166 Static void ucom_shutdown(struct ucom_softc *); 167 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 168 int, usb_proc_ptr); 169 Static void ucom_dtr(struct ucom_softc *, int); 170 Static void ucom_rts(struct ucom_softc *, int); 171 Static void ucom_break(struct ucom_softc *, int); 172 Static usbd_status ucomstartread(struct ucom_softc *); 173 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 174 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 175 Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 176 Static int ucom_to_tiocm(struct ucom_softc *); 177 178 USB_DECLARE_DRIVER(ucom); 179 180 USB_MATCH(ucom) 181 { 182 return (1); 183 } 184 185 USB_ATTACH(ucom) 186 { 187 struct ucom_softc *sc = (struct ucom_softc *)self; 188 struct ucom_attach_args *uca = aux; 189 struct tty *tp; 190 191 if (uca->portno != UCOM_UNK_PORTNO) 192 printf(": portno %d", uca->portno); 193 if (uca->info != NULL) 194 printf(", %s", uca->info); 195 printf("\n"); 196 197 sc->sc_udev = uca->device; 198 sc->sc_iface = uca->iface; 199 sc->sc_bulkout_no = uca->bulkout; 200 sc->sc_bulkin_no = uca->bulkin; 201 sc->sc_ibufsize = uca->ibufsize; 202 sc->sc_ibufsizepad = uca->ibufsizepad; 203 sc->sc_obufsize = uca->obufsize; 204 sc->sc_opkthdrlen = uca->opkthdrlen; 205 sc->sc_methods = uca->methods; 206 sc->sc_parent = uca->arg; 207 sc->sc_portno = uca->portno; 208 209 tp = ttymalloc(); 210 tp->t_oproc = ucomstart; 211 tp->t_param = ucomparam; 212 sc->sc_tty = tp; 213 214 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 215 tty_attach(tp); 216 217 #if defined(__NetBSD__) && NRND > 0 218 rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev), 219 RND_TYPE_TTY, 0); 220 #endif 221 222 USB_ATTACH_SUCCESS_RETURN; 223 } 224 225 USB_DETACH(ucom) 226 { 227 struct ucom_softc *sc = (struct ucom_softc *)self; 228 struct tty *tp = sc->sc_tty; 229 int maj, mn; 230 int s; 231 232 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n", 233 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no)); 234 235 sc->sc_dying = 1; 236 237 if (sc->sc_bulkin_pipe != NULL) 238 usbd_abort_pipe(sc->sc_bulkin_pipe); 239 if (sc->sc_bulkout_pipe != NULL) 240 usbd_abort_pipe(sc->sc_bulkout_pipe); 241 242 s = splusb(); 243 if (--sc->sc_refcnt >= 0) { 244 /* Wake up anyone waiting */ 245 if (tp != NULL) { 246 CLR(tp->t_state, TS_CARR_ON); 247 CLR(tp->t_cflag, CLOCAL | MDMBUF); 248 ttyflush(tp, FREAD|FWRITE); 249 } 250 /* Wait for processes to go away. */ 251 usb_detach_wait(USBDEV(sc->sc_dev)); 252 } 253 splx(s); 254 255 #if defined(__NetBSD__) 256 /* locate the major number */ 257 maj = cdevsw_lookup_major(&ucom_cdevsw); 258 #else 259 /* locate the major number */ 260 for (maj = 0; maj < nchrdev; maj++) 261 if (cdevsw[maj].d_open == ucomopen) 262 break; 263 #endif 264 265 /* Nuke the vnodes for any open instances. */ 266 mn = self->dv_unit; 267 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 268 vdevgone(maj, mn, mn, VCHR); 269 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 270 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 271 272 /* Detach and free the tty. */ 273 if (tp != NULL) { 274 tty_detach(tp); 275 ttyfree(tp); 276 sc->sc_tty = NULL; 277 } 278 279 /* Detach the random source */ 280 #if defined(__NetBSD__) && NRND > 0 281 rnd_detach_source(&sc->sc_rndsource); 282 #endif 283 284 return (0); 285 } 286 287 int 288 ucom_activate(device_ptr_t self, enum devact act) 289 { 290 struct ucom_softc *sc = (struct ucom_softc *)self; 291 292 DPRINTFN(5,("ucom_activate: %d\n", act)); 293 294 switch (act) { 295 case DVACT_ACTIVATE: 296 return (EOPNOTSUPP); 297 298 case DVACT_DEACTIVATE: 299 sc->sc_dying = 1; 300 break; 301 } 302 return (0); 303 } 304 305 void 306 ucom_shutdown(struct ucom_softc *sc) 307 { 308 struct tty *tp = sc->sc_tty; 309 310 DPRINTF(("ucom_shutdown\n")); 311 /* 312 * Hang up if necessary. Wait a bit, so the other side has time to 313 * notice even if we immediately open the port again. 314 */ 315 if (ISSET(tp->t_cflag, HUPCL)) { 316 ucom_dtr(sc, 0); 317 (void)tsleep(sc, TTIPRI, ttclos, hz); 318 } 319 } 320 321 int 322 ucomopen(dev_t dev, int flag, int mode, usb_proc_ptr p) 323 { 324 int unit = UCOMUNIT(dev); 325 usbd_status err; 326 struct ucom_softc *sc; 327 struct tty *tp; 328 int s; 329 int error; 330 331 if (unit >= ucom_cd.cd_ndevs) 332 return (ENXIO); 333 sc = ucom_cd.cd_devs[unit]; 334 if (sc == NULL) 335 return (ENXIO); 336 337 if (sc->sc_dying) 338 return (EIO); 339 340 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 341 return (ENXIO); 342 343 tp = sc->sc_tty; 344 345 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 346 347 if (ISSET(tp->t_state, TS_ISOPEN) && 348 ISSET(tp->t_state, TS_XCLUDE) && 349 p->p_ucred->cr_uid != 0) 350 return (EBUSY); 351 352 s = spltty(); 353 354 /* 355 * Do the following iff this is a first open. 356 */ 357 while (sc->sc_opening) 358 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 359 360 if (sc->sc_dying) { 361 splx(s); 362 return (EIO); 363 } 364 sc->sc_opening = 1; 365 366 #if defined(__NetBSD__) 367 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 368 #else 369 if (!ISSET(tp->t_state, TS_ISOPEN)) { 370 #endif 371 struct termios t; 372 373 tp->t_dev = dev; 374 375 if (sc->sc_methods->ucom_open != NULL) { 376 error = sc->sc_methods->ucom_open(sc->sc_parent, 377 sc->sc_portno); 378 if (error) { 379 ucom_cleanup(sc); 380 sc->sc_opening = 0; 381 wakeup(&sc->sc_opening); 382 splx(s); 383 return (error); 384 } 385 } 386 387 ucom_status_change(sc); 388 389 /* 390 * Initialize the termios status to the defaults. Add in the 391 * sticky bits from TIOCSFLAGS. 392 */ 393 t.c_ispeed = 0; 394 t.c_ospeed = TTYDEF_SPEED; 395 t.c_cflag = TTYDEF_CFLAG; 396 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 397 SET(t.c_cflag, CLOCAL); 398 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 399 SET(t.c_cflag, CRTSCTS); 400 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 401 SET(t.c_cflag, MDMBUF); 402 /* Make sure ucomparam() will do something. */ 403 tp->t_ospeed = 0; 404 (void) ucomparam(tp, &t); 405 tp->t_iflag = TTYDEF_IFLAG; 406 tp->t_oflag = TTYDEF_OFLAG; 407 tp->t_lflag = TTYDEF_LFLAG; 408 ttychars(tp); 409 ttsetwater(tp); 410 411 /* 412 * Turn on DTR. We must always do this, even if carrier is not 413 * present, because otherwise we'd have to use TIOCSDTR 414 * immediately after setting CLOCAL, which applications do not 415 * expect. We always assert DTR while the device is open 416 * unless explicitly requested to deassert it. 417 */ 418 ucom_dtr(sc, 1); 419 420 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/ 421 ucom_hwiflow(sc); 422 423 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 424 sc->sc_bulkin_no, sc->sc_bulkout_no)); 425 426 /* Open the bulk pipes */ 427 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 428 &sc->sc_bulkin_pipe); 429 if (err) { 430 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 431 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 432 usbd_errstr(err))); 433 error = EIO; 434 goto fail_0; 435 } 436 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 437 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 438 if (err) { 439 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 440 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 441 usbd_errstr(err))); 442 error = EIO; 443 goto fail_1; 444 } 445 446 /* Allocate a request and an input buffer and start reading. */ 447 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 448 if (sc->sc_ixfer == NULL) { 449 error = ENOMEM; 450 goto fail_2; 451 } 452 453 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 454 sc->sc_ibufsizepad); 455 if (sc->sc_ibuf == NULL) { 456 error = ENOMEM; 457 goto fail_3; 458 } 459 460 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 461 if (sc->sc_oxfer == NULL) { 462 error = ENOMEM; 463 goto fail_3; 464 } 465 466 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 467 sc->sc_obufsize + 468 sc->sc_opkthdrlen); 469 if (sc->sc_obuf == NULL) { 470 error = ENOMEM; 471 goto fail_4; 472 } 473 474 ucomstartread(sc); 475 } 476 sc->sc_opening = 0; 477 wakeup(&sc->sc_opening); 478 splx(s); 479 480 #if defined(__NetBSD__) 481 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 482 #else 483 error = ttyopen(UCOMDIALOUT(dev), tp); 484 #endif 485 if (error) 486 goto bad; 487 488 error = (*LINESW(tp, l_open))(dev, tp); 489 if (error) 490 goto bad; 491 492 return (0); 493 494 fail_4: 495 usbd_free_xfer(sc->sc_oxfer); 496 sc->sc_oxfer = NULL; 497 fail_3: 498 usbd_free_xfer(sc->sc_ixfer); 499 sc->sc_ixfer = NULL; 500 fail_2: 501 usbd_close_pipe(sc->sc_bulkout_pipe); 502 sc->sc_bulkout_pipe = NULL; 503 fail_1: 504 usbd_close_pipe(sc->sc_bulkin_pipe); 505 sc->sc_bulkin_pipe = NULL; 506 fail_0: 507 sc->sc_opening = 0; 508 wakeup(&sc->sc_opening); 509 splx(s); 510 return (error); 511 512 bad: 513 #if defined(__NetBSD__) 514 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 515 #else 516 if (!ISSET(tp->t_state, TS_ISOPEN)) { 517 #endif 518 /* 519 * We failed to open the device, and nobody else had it opened. 520 * Clean up the state as appropriate. 521 */ 522 ucom_cleanup(sc); 523 } 524 525 return (error); 526 } 527 528 int 529 ucomclose(dev_t dev, int flag, int mode, usb_proc_ptr p) 530 { 531 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 532 struct tty *tp = sc->sc_tty; 533 534 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 535 if (!ISSET(tp->t_state, TS_ISOPEN)) 536 return (0); 537 538 sc->sc_refcnt++; 539 540 (*LINESW(tp, l_close))(tp, flag); 541 ttyclose(tp); 542 543 #if defined(__NetBSD__) 544 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 545 #else 546 if (!ISSET(tp->t_state, TS_ISOPEN)) { 547 #endif 548 /* 549 * Although we got a last close, the device may still be in 550 * use; e.g. if this was the dialout node, and there are still 551 * processes waiting for carrier on the non-dialout node. 552 */ 553 ucom_cleanup(sc); 554 } 555 556 if (sc->sc_methods->ucom_close != NULL) 557 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 558 559 if (--sc->sc_refcnt < 0) 560 usb_detach_wakeup(USBDEV(sc->sc_dev)); 561 562 return (0); 563 } 564 565 int 566 ucomread(dev_t dev, struct uio *uio, int flag) 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 = (*LINESW(tp, l_read))(tp, uio, flag); 577 if (--sc->sc_refcnt < 0) 578 usb_detach_wakeup(USBDEV(sc->sc_dev)); 579 return (error); 580 } 581 582 int 583 ucomwrite(dev_t dev, struct uio *uio, int flag) 584 { 585 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 586 struct tty *tp = sc->sc_tty; 587 int error; 588 589 if (sc->sc_dying) 590 return (EIO); 591 592 sc->sc_refcnt++; 593 error = (*LINESW(tp, l_write))(tp, uio, flag); 594 if (--sc->sc_refcnt < 0) 595 usb_detach_wakeup(USBDEV(sc->sc_dev)); 596 return (error); 597 } 598 599 #if defined(__NetBSD__) 600 int 601 ucompoll(dev_t dev, int events, usb_proc_ptr p) 602 { 603 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 604 struct tty *tp = sc->sc_tty; 605 int error; 606 607 if (sc->sc_dying) 608 return (EIO); 609 610 sc->sc_refcnt++; 611 error = (*LINESW(tp, l_poll))(tp, events, p); 612 if (--sc->sc_refcnt < 0) 613 usb_detach_wakeup(USBDEV(sc->sc_dev)); 614 return (error); 615 } 616 #endif 617 618 struct tty * 619 ucomtty(dev_t dev) 620 { 621 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 622 struct tty *tp = sc->sc_tty; 623 624 return (tp); 625 } 626 627 int 628 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, usb_proc_ptr p) 629 { 630 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 631 int error; 632 633 sc->sc_refcnt++; 634 error = ucom_do_ioctl(sc, cmd, data, flag, p); 635 if (--sc->sc_refcnt < 0) 636 usb_detach_wakeup(USBDEV(sc->sc_dev)); 637 return (error); 638 } 639 640 Static int 641 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 642 int flag, usb_proc_ptr p) 643 { 644 struct tty *tp = sc->sc_tty; 645 int error; 646 int s; 647 648 if (sc->sc_dying) 649 return (EIO); 650 651 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 652 653 error = (*LINESW(tp, l_ioctl))(tp, cmd, data, flag, p); 654 if (error >= 0) 655 return (error); 656 657 error = ttioctl(tp, cmd, data, flag, p); 658 if (error >= 0) 659 return (error); 660 661 if (sc->sc_methods->ucom_ioctl != NULL) { 662 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 663 sc->sc_portno, cmd, data, flag, p); 664 if (error >= 0) 665 return (error); 666 } 667 668 error = 0; 669 670 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 671 s = spltty(); 672 673 switch (cmd) { 674 case TIOCSBRK: 675 ucom_break(sc, 1); 676 break; 677 678 case TIOCCBRK: 679 ucom_break(sc, 0); 680 break; 681 682 case TIOCSDTR: 683 ucom_dtr(sc, 1); 684 break; 685 686 case TIOCCDTR: 687 ucom_dtr(sc, 0); 688 break; 689 690 case TIOCGFLAGS: 691 *(int *)data = sc->sc_swflags; 692 break; 693 694 case TIOCSFLAGS: 695 error = suser(p->p_ucred, &p->p_acflag); 696 if (error) 697 break; 698 sc->sc_swflags = *(int *)data; 699 break; 700 701 case TIOCMSET: 702 case TIOCMBIS: 703 case TIOCMBIC: 704 tiocm_to_ucom(sc, cmd, *(int *)data); 705 break; 706 707 case TIOCMGET: 708 *(int *)data = ucom_to_tiocm(sc); 709 break; 710 711 default: 712 error = ENOTTY; 713 break; 714 } 715 716 splx(s); 717 718 return (error); 719 } 720 721 Static void 722 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 723 { 724 u_char combits; 725 726 combits = 0; 727 if (ISSET(ttybits, TIOCM_DTR)) 728 SET(combits, UMCR_DTR); 729 if (ISSET(ttybits, TIOCM_RTS)) 730 SET(combits, UMCR_RTS); 731 732 switch (how) { 733 case TIOCMBIC: 734 CLR(sc->sc_mcr, combits); 735 break; 736 737 case TIOCMBIS: 738 SET(sc->sc_mcr, combits); 739 break; 740 741 case TIOCMSET: 742 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 743 SET(sc->sc_mcr, combits); 744 break; 745 } 746 747 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 748 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 749 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 750 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 751 } 752 753 Static int 754 ucom_to_tiocm(struct ucom_softc *sc) 755 { 756 u_char combits; 757 int ttybits = 0; 758 759 combits = sc->sc_mcr; 760 if (ISSET(combits, UMCR_DTR)) 761 SET(ttybits, TIOCM_DTR); 762 if (ISSET(combits, UMCR_RTS)) 763 SET(ttybits, TIOCM_RTS); 764 765 combits = sc->sc_msr; 766 if (ISSET(combits, UMSR_DCD)) 767 SET(ttybits, TIOCM_CD); 768 if (ISSET(combits, UMSR_CTS)) 769 SET(ttybits, TIOCM_CTS); 770 if (ISSET(combits, UMSR_DSR)) 771 SET(ttybits, TIOCM_DSR); 772 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 773 SET(ttybits, TIOCM_RI); 774 775 #if 0 776 XXX; 777 if (sc->sc_ier != 0) 778 SET(ttybits, TIOCM_LE); 779 #endif 780 781 return (ttybits); 782 } 783 784 Static void 785 ucom_break(sc, onoff) 786 struct ucom_softc *sc; 787 int onoff; 788 { 789 DPRINTF(("ucom_break: onoff=%d\n", onoff)); 790 791 if (sc->sc_methods->ucom_set != NULL) 792 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 793 UCOM_SET_BREAK, onoff); 794 } 795 796 Static void 797 ucom_dtr(struct ucom_softc *sc, int onoff) 798 { 799 DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); 800 801 if (sc->sc_methods->ucom_set != NULL) 802 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 803 UCOM_SET_DTR, onoff); 804 } 805 806 Static void 807 ucom_rts(struct ucom_softc *sc, int onoff) 808 { 809 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 810 811 if (sc->sc_methods->ucom_set != NULL) 812 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 813 UCOM_SET_RTS, onoff); 814 } 815 816 void 817 ucom_status_change(struct ucom_softc *sc) 818 { 819 struct tty *tp = sc->sc_tty; 820 u_char old_msr; 821 822 if (sc->sc_methods->ucom_get_status != NULL) { 823 old_msr = sc->sc_msr; 824 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 825 &sc->sc_lsr, &sc->sc_msr); 826 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) 827 (*LINESW(tp, l_modem))(tp, 828 ISSET(sc->sc_msr, UMSR_DCD)); 829 } else { 830 sc->sc_lsr = 0; 831 sc->sc_msr = 0; 832 } 833 } 834 835 Static int 836 ucomparam(struct tty *tp, struct termios *t) 837 { 838 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 839 int error; 840 841 if (sc->sc_dying) 842 return (EIO); 843 844 /* Check requested parameters. */ 845 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 846 return (EINVAL); 847 848 /* 849 * For the console, always force CLOCAL and !HUPCL, so that the port 850 * is always active. 851 */ 852 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 853 SET(t->c_cflag, CLOCAL); 854 CLR(t->c_cflag, HUPCL); 855 } 856 857 /* 858 * If there were no changes, don't do anything. This avoids dropping 859 * input and improves performance when all we did was frob things like 860 * VMIN and VTIME. 861 */ 862 if (tp->t_ospeed == t->c_ospeed && 863 tp->t_cflag == t->c_cflag) 864 return (0); 865 866 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 867 868 /* And copy to tty. */ 869 tp->t_ispeed = 0; 870 tp->t_ospeed = t->c_ospeed; 871 tp->t_cflag = t->c_cflag; 872 873 if (sc->sc_methods->ucom_param != NULL) { 874 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 875 t); 876 if (error) 877 return (error); 878 } 879 880 /* XXX worry about CHWFLOW */ 881 882 /* 883 * Update the tty layer's idea of the carrier bit, in case we changed 884 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 885 * explicit request. 886 */ 887 DPRINTF(("ucomparam: l_modem\n")); 888 (void) (*LINESW(tp, l_modem))(tp, 1 /* XXX carrier */ ); 889 890 #if 0 891 XXX what if the hardware is not open 892 if (!ISSET(t->c_cflag, CHWFLOW)) { 893 if (sc->sc_tx_stopped) { 894 sc->sc_tx_stopped = 0; 895 ucomstart(tp); 896 } 897 } 898 #endif 899 900 return (0); 901 } 902 903 /* 904 * (un)block input via hw flowcontrol 905 */ 906 Static void 907 ucom_hwiflow(struct ucom_softc *sc) 908 { 909 DPRINTF(("ucom_hwiflow:\n")); 910 #if 0 911 XXX 912 bus_space_tag_t iot = sc->sc_iot; 913 bus_space_handle_t ioh = sc->sc_ioh; 914 915 if (sc->sc_mcr_rts == 0) 916 return; 917 918 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 919 CLR(sc->sc_mcr, sc->sc_mcr_rts); 920 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 921 } else { 922 SET(sc->sc_mcr, sc->sc_mcr_rts); 923 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 924 } 925 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 926 #endif 927 } 928 929 Static void 930 ucomstart(struct tty *tp) 931 { 932 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 933 usbd_status err; 934 int s; 935 u_char *data; 936 int cnt; 937 938 if (sc->sc_dying) 939 return; 940 941 s = spltty(); 942 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 943 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 944 goto out; 945 } 946 if (sc->sc_tx_stopped) 947 goto out; 948 949 if (tp->t_outq.c_cc <= tp->t_lowat) { 950 if (ISSET(tp->t_state, TS_ASLEEP)) { 951 CLR(tp->t_state, TS_ASLEEP); 952 wakeup(&tp->t_outq); 953 } 954 selwakeup(&tp->t_wsel); 955 if (tp->t_outq.c_cc == 0) 956 goto out; 957 } 958 959 /* Grab the first contiguous region of buffer space. */ 960 data = tp->t_outq.c_cf; 961 cnt = ndqb(&tp->t_outq, 0); 962 963 if (cnt == 0) { 964 DPRINTF(("ucomstart: cnt==0\n")); 965 goto out; 966 } 967 968 SET(tp->t_state, TS_BUSY); 969 970 if (cnt > sc->sc_obufsize) { 971 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 972 cnt = sc->sc_obufsize; 973 } 974 if (sc->sc_methods->ucom_write != NULL) 975 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 976 sc->sc_obuf, data, &cnt); 977 else 978 memcpy(sc->sc_obuf, data, cnt); 979 980 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 981 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 982 (usbd_private_handle)sc, sc->sc_obuf, cnt, 983 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 984 /* What can we do on error? */ 985 err = usbd_transfer(sc->sc_oxfer); 986 #ifdef DIAGNOSTIC 987 if (err != USBD_IN_PROGRESS) 988 printf("ucomstart: err=%s\n", usbd_errstr(err)); 989 #endif 990 991 out: 992 splx(s); 993 } 994 995 #if defined(__NetBSD__) 996 void 997 #else 998 int 999 #endif 1000 ucomstop(struct tty *tp, int flag) 1001 { 1002 DPRINTF(("ucomstop: flag=%d\n", flag)); 1003 #if 0 1004 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 1005 int s; 1006 1007 s = spltty(); 1008 if (ISSET(tp->t_state, TS_BUSY)) { 1009 DPRINTF(("ucomstop: XXX\n")); 1010 /* sc->sc_tx_stopped = 1; */ 1011 if (!ISSET(tp->t_state, TS_TTSTOP)) 1012 SET(tp->t_state, TS_FLUSH); 1013 } 1014 splx(s); 1015 #endif 1016 #if !defined(__NetBSD__) 1017 return (0); 1018 #endif 1019 } 1020 1021 Static void 1022 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1023 { 1024 struct ucom_softc *sc = (struct ucom_softc *)p; 1025 struct tty *tp = sc->sc_tty; 1026 u_int32_t cc; 1027 int s; 1028 1029 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 1030 1031 if (status == USBD_CANCELLED || sc->sc_dying) 1032 goto error; 1033 1034 if (status) { 1035 DPRINTF(("ucomwritecb: status=%d\n", status)); 1036 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1037 /* XXX we should restart after some delay. */ 1038 goto error; 1039 } 1040 1041 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 1042 #if defined(__NetBSD__) && NRND > 0 1043 rnd_add_uint32(&sc->sc_rndsource, cc); 1044 #endif 1045 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 1046 /* convert from USB bytes to tty bytes */ 1047 cc -= sc->sc_opkthdrlen; 1048 1049 s = spltty(); 1050 CLR(tp->t_state, TS_BUSY); 1051 if (ISSET(tp->t_state, TS_FLUSH)) 1052 CLR(tp->t_state, TS_FLUSH); 1053 else 1054 ndflush(&tp->t_outq, cc); 1055 (*LINESW(tp, l_start))(tp); 1056 splx(s); 1057 return; 1058 1059 error: 1060 s = spltty(); 1061 CLR(tp->t_state, TS_BUSY); 1062 splx(s); 1063 } 1064 1065 Static usbd_status 1066 ucomstartread(struct ucom_softc *sc) 1067 { 1068 usbd_status err; 1069 1070 DPRINTFN(5,("ucomstartread: start\n")); 1071 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 1072 (usbd_private_handle)sc, 1073 sc->sc_ibuf, sc->sc_ibufsize, 1074 USBD_SHORT_XFER_OK | USBD_NO_COPY, 1075 USBD_NO_TIMEOUT, ucomreadcb); 1076 err = usbd_transfer(sc->sc_ixfer); 1077 if (err != USBD_IN_PROGRESS) { 1078 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 1079 return (err); 1080 } 1081 return (USBD_NORMAL_COMPLETION); 1082 } 1083 1084 Static void 1085 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 1086 { 1087 struct ucom_softc *sc = (struct ucom_softc *)p; 1088 struct tty *tp = sc->sc_tty; 1089 int (*rint)(int c, struct tty *tp) = LINESW(tp, l_rint); 1090 usbd_status err; 1091 u_int32_t cc; 1092 u_char *cp; 1093 int s; 1094 1095 DPRINTFN(5,("ucomreadcb: status=%d\n", status)); 1096 1097 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1098 sc->sc_dying) { 1099 DPRINTF(("ucomreadcb: dying\n")); 1100 /* Send something to wake upper layer */ 1101 s = spltty(); 1102 (*rint)('\n', tp); 1103 ttwakeup(tp); 1104 splx(s); 1105 return; 1106 } 1107 1108 if (status) { 1109 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1110 /* XXX we should restart after some delay. */ 1111 return; 1112 } 1113 1114 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1115 #if defined(__NetBSD__) && NRND > 0 1116 rnd_add_uint32(&sc->sc_rndsource, cc); 1117 #endif 1118 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 1119 if (sc->sc_methods->ucom_read != NULL) 1120 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1121 &cp, &cc); 1122 1123 s = spltty(); 1124 /* Give characters to tty layer. */ 1125 while (cc-- > 0) { 1126 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 1127 if ((*rint)(*cp++, tp) == -1) { 1128 /* XXX what should we do? */ 1129 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 1130 cc); 1131 break; 1132 } 1133 } 1134 splx(s); 1135 1136 err = ucomstartread(sc); 1137 if (err) { 1138 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1139 /* XXX what should we dow now? */ 1140 } 1141 } 1142 1143 Static void 1144 ucom_cleanup(struct ucom_softc *sc) 1145 { 1146 DPRINTF(("ucom_cleanup: closing pipes\n")); 1147 1148 ucom_shutdown(sc); 1149 if (sc->sc_bulkin_pipe != NULL) { 1150 usbd_abort_pipe(sc->sc_bulkin_pipe); 1151 usbd_close_pipe(sc->sc_bulkin_pipe); 1152 sc->sc_bulkin_pipe = NULL; 1153 } 1154 if (sc->sc_bulkout_pipe != NULL) { 1155 usbd_abort_pipe(sc->sc_bulkout_pipe); 1156 usbd_close_pipe(sc->sc_bulkout_pipe); 1157 sc->sc_bulkout_pipe = NULL; 1158 } 1159 if (sc->sc_ixfer != NULL) { 1160 usbd_free_xfer(sc->sc_ixfer); 1161 sc->sc_ixfer = NULL; 1162 } 1163 if (sc->sc_oxfer != NULL) { 1164 usbd_free_xfer(sc->sc_oxfer); 1165 sc->sc_oxfer = NULL; 1166 } 1167 } 1168 1169 #endif /* NUCOM > 0 */ 1170 1171 int 1172 ucomprint(void *aux, const char *pnp) 1173 { 1174 struct ucom_attach_args *uca = aux; 1175 1176 if (pnp) 1177 printf("ucom at %s", pnp); 1178 if (uca->portno != UCOM_UNK_PORTNO) 1179 printf(" portno %d", uca->portno); 1180 return (UNCONF); 1181 } 1182 1183 int 1184 #if defined(__OpenBSD__) 1185 ucomsubmatch(struct device *parent, void *match, void *aux) 1186 #else 1187 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1188 #endif 1189 { 1190 struct ucom_attach_args *uca = aux; 1191 #if defined(__OpenBSD__) 1192 struct cfdata *cf = match; 1193 #endif 1194 1195 if (uca->portno != UCOM_UNK_PORTNO && 1196 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1197 cf->ucomcf_portno != uca->portno) 1198 return (0); 1199 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1200 } 1201