ucom.c revision 1.24.2.2
1 /* $NetBSD: ucom.c,v 1.24.2.2 2000/09/09 02:11:30 toshii 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/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_opkthdrlen; /* header length of 105 * output packet */ 106 107 struct ucom_methods *sc_methods; 108 void *sc_parent; 109 int sc_portno; 110 111 struct tty *sc_tty; /* our tty */ 112 u_char sc_lsr; 113 u_char sc_msr; 114 u_char sc_mcr; 115 u_char sc_tx_stopped; 116 int sc_swflags; 117 118 u_char sc_opening; /* lock during open */ 119 int sc_refcnt; 120 u_char sc_dying; /* disconnecting */ 121 }; 122 123 cdev_decl(ucom); 124 125 Static void ucom_cleanup(struct ucom_softc *); 126 Static void ucom_hwiflow(struct ucom_softc *); 127 Static int ucomparam(struct tty *, struct termios *); 128 Static void ucomstart(struct tty *); 129 Static void ucom_shutdown(struct ucom_softc *); 130 Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, 131 int, struct proc *); 132 Static void ucom_dtr(struct ucom_softc *, int); 133 Static void ucom_rts(struct ucom_softc *, int); 134 Static void ucom_break(struct ucom_softc *, int); 135 Static usbd_status ucomstartread(struct ucom_softc *); 136 Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); 137 Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); 138 Static void tiocm_to_ucom(struct ucom_softc *, int, int); 139 Static int ucom_to_tiocm(struct ucom_softc *); 140 141 USB_DECLARE_DRIVER(ucom); 142 143 USB_MATCH(ucom) 144 { 145 return (1); 146 } 147 148 USB_ATTACH(ucom) 149 { 150 struct ucom_softc *sc = (struct ucom_softc *)self; 151 struct ucom_attach_args *uca = aux; 152 struct tty *tp; 153 154 if (uca->portno != UCOM_UNK_PORTNO) 155 printf(": portno %d", uca->portno); 156 printf("\n"); 157 158 sc->sc_udev = uca->device; 159 sc->sc_iface = uca->iface; 160 sc->sc_bulkout_no = uca->bulkout; 161 sc->sc_bulkin_no = uca->bulkin; 162 sc->sc_ibufsize = uca->ibufsize; 163 sc->sc_ibufsizepad = uca->ibufsizepad; 164 sc->sc_obufsize = uca->obufsize; 165 sc->sc_opkthdrlen = uca->opkthdrlen; 166 sc->sc_methods = uca->methods; 167 sc->sc_parent = uca->arg; 168 sc->sc_portno = uca->portno; 169 170 tp = ttymalloc(); 171 tp->t_oproc = ucomstart; 172 tp->t_param = ucomparam; 173 sc->sc_tty = tp; 174 175 DPRINTF(("ucom_attach: tty_attach %p\n", tp)); 176 tty_attach(tp); 177 178 USB_ATTACH_SUCCESS_RETURN; 179 } 180 181 USB_DETACH(ucom) 182 { 183 struct ucom_softc *sc = (struct ucom_softc *)self; 184 int maj, mn; 185 int s; 186 187 DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p\n", 188 sc, flags, sc->sc_tty)); 189 190 sc->sc_dying = 1; 191 192 #ifdef DIAGNOSTIC 193 if (sc->sc_tty == NULL) { 194 DPRINTF(("ucom_detach: no tty\n")); 195 return (0); 196 } 197 #endif 198 199 s = splusb(); 200 if (--sc->sc_refcnt >= 0) { 201 /* Wake everyone.. how? */ 202 /* Wait for processes to go away. */ 203 usb_detach_wait(USBDEV(sc->sc_dev)); 204 } 205 splx(s); 206 207 /* locate the major number */ 208 for (maj = 0; maj < nchrdev; maj++) 209 if (cdevsw[maj].d_open == ucomopen) 210 break; 211 212 /* Nuke the vnodes for any open instances. */ 213 mn = self->dv_unit; 214 DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn)); 215 vdevgone(maj, mn, mn, VCHR); 216 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 217 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 218 219 /* Detach and free the tty. */ 220 tty_detach(sc->sc_tty); 221 ttyfree(sc->sc_tty); 222 sc->sc_tty = 0; 223 224 return (0); 225 } 226 227 #if defined(__NetBSD__) || defined(__OpenBSD__) 228 int 229 ucom_activate(device_ptr_t self, enum devact act) 230 { 231 struct ucom_softc *sc = (struct ucom_softc *)self; 232 233 switch (act) { 234 case DVACT_ACTIVATE: 235 return (EOPNOTSUPP); 236 break; 237 238 case DVACT_DEACTIVATE: 239 sc->sc_dying = 1; 240 break; 241 } 242 return (0); 243 } 244 #endif 245 246 void 247 ucom_shutdown(struct ucom_softc *sc) 248 { 249 struct tty *tp = sc->sc_tty; 250 251 DPRINTF(("ucom_shutdown\n")); 252 /* 253 * Hang up if necessary. Wait a bit, so the other side has time to 254 * notice even if we immediately open the port again. 255 */ 256 if (ISSET(tp->t_cflag, HUPCL)) { 257 ucom_dtr(sc, 0); 258 (void)tsleep(sc, TTIPRI, ttclos, hz); 259 } 260 } 261 262 int 263 ucomopen(dev_t dev, int flag, int mode, struct proc *p) 264 { 265 int unit = UCOMUNIT(dev); 266 usbd_status err; 267 struct ucom_softc *sc; 268 struct tty *tp; 269 int s; 270 int error; 271 272 if (unit >= ucom_cd.cd_ndevs) 273 return (ENXIO); 274 sc = ucom_cd.cd_devs[unit]; 275 if (sc == NULL) 276 return (ENXIO); 277 278 if (sc->sc_dying) 279 return (EIO); 280 281 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 282 return (ENXIO); 283 284 tp = sc->sc_tty; 285 286 DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); 287 288 if (ISSET(tp->t_state, TS_ISOPEN) && 289 ISSET(tp->t_state, TS_XCLUDE) && 290 p->p_ucred->cr_uid != 0) 291 return (EBUSY); 292 293 s = spltty(); 294 295 /* 296 * Do the following iff this is a first open. 297 */ 298 while (sc->sc_opening) 299 tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); 300 301 if (sc->sc_dying) { 302 splx(s); 303 return (EIO); 304 } 305 sc->sc_opening = 1; 306 307 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 308 struct termios t; 309 310 tp->t_dev = dev; 311 312 if (sc->sc_methods->ucom_open != NULL) { 313 error = sc->sc_methods->ucom_open(sc->sc_parent, 314 sc->sc_portno); 315 if (error) { 316 ucom_cleanup(sc); 317 sc->sc_opening = 0; 318 wakeup(&sc->sc_opening); 319 splx(s); 320 return (error); 321 } 322 } 323 324 ucom_status_change(sc); 325 326 /* 327 * Initialize the termios status to the defaults. Add in the 328 * sticky bits from TIOCSFLAGS. 329 */ 330 t.c_ispeed = 0; 331 t.c_ospeed = TTYDEF_SPEED; 332 t.c_cflag = TTYDEF_CFLAG; 333 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 334 SET(t.c_cflag, CLOCAL); 335 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 336 SET(t.c_cflag, CRTSCTS); 337 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 338 SET(t.c_cflag, MDMBUF); 339 /* Make sure ucomparam() will do something. */ 340 tp->t_ospeed = 0; 341 (void) ucomparam(tp, &t); 342 tp->t_iflag = TTYDEF_IFLAG; 343 tp->t_oflag = TTYDEF_OFLAG; 344 tp->t_lflag = TTYDEF_LFLAG; 345 ttychars(tp); 346 ttsetwater(tp); 347 348 /* 349 * Turn on DTR. We must always do this, even if carrier is not 350 * present, because otherwise we'd have to use TIOCSDTR 351 * immediately after setting CLOCAL, which applications do not 352 * expect. We always assert DTR while the device is open 353 * unless explicitly requested to deassert it. 354 */ 355 ucom_dtr(sc, 1); 356 357 // XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 358 ucom_hwiflow(sc); 359 360 DPRINTF(("ucomopen: open pipes in=%d out=%d\n", 361 sc->sc_bulkin_no, sc->sc_bulkout_no)); 362 363 /* Open the bulk pipes */ 364 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, 365 &sc->sc_bulkin_pipe); 366 if (err) { 367 DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", 368 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, 369 usbd_errstr(err))); 370 goto fail_0; 371 } 372 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 373 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 374 if (err) { 375 DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", 376 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, 377 usbd_errstr(err))); 378 goto fail_1; 379 } 380 381 /* Allocate a request and an input buffer and start reading. */ 382 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); 383 if (sc->sc_ixfer == NULL) 384 goto fail_2; 385 386 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, 387 sc->sc_ibufsizepad); 388 if (sc->sc_ibuf == NULL) 389 goto fail_3; 390 391 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); 392 if (sc->sc_oxfer == NULL) 393 goto fail_3; 394 395 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, 396 sc->sc_obufsize + 397 sc->sc_opkthdrlen); 398 if (sc->sc_obuf == NULL) 399 goto fail_4; 400 401 ucomstartread(sc); 402 } 403 sc->sc_opening = 0; 404 wakeup(&sc->sc_opening); 405 splx(s); 406 407 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 408 if (error) 409 goto bad; 410 411 error = (*linesw[tp->t_line].l_open)(dev, tp); 412 if (error) 413 goto bad; 414 415 return (0); 416 417 fail_4: 418 usbd_free_xfer(sc->sc_oxfer); 419 fail_3: 420 usbd_free_xfer(sc->sc_ixfer); 421 fail_2: 422 usbd_close_pipe(sc->sc_bulkin_pipe); 423 usbd_close_pipe(sc->sc_bulkout_pipe); 424 sc->sc_opening = 0; 425 wakeup(&sc->sc_opening); 426 splx(s); 427 return (ENOMEM); 428 429 fail_1: 430 usbd_close_pipe(sc->sc_bulkin_pipe); 431 fail_0: 432 sc->sc_opening = 0; 433 wakeup(&sc->sc_opening); 434 splx(s); 435 return (EIO); 436 437 bad: 438 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 439 /* 440 * We failed to open the device, and nobody else had it opened. 441 * Clean up the state as appropriate. 442 */ 443 ucom_cleanup(sc); 444 } 445 446 return (error); 447 } 448 449 int 450 ucomclose(dev_t dev, int flag, int mode, struct proc *p) 451 { 452 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 453 struct tty *tp = sc->sc_tty; 454 455 DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); 456 if (!ISSET(tp->t_state, TS_ISOPEN)) 457 return (0); 458 459 sc->sc_refcnt++; 460 461 (*linesw[tp->t_line].l_close)(tp, flag); 462 ttyclose(tp); 463 464 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 465 /* 466 * Although we got a last close, the device may still be in 467 * use; e.g. if this was the dialout node, and there are still 468 * processes waiting for carrier on the non-dialout node. 469 */ 470 ucom_cleanup(sc); 471 } 472 473 if (sc->sc_methods->ucom_close != NULL) 474 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 475 476 if (--sc->sc_refcnt < 0) 477 usb_detach_wakeup(USBDEV(sc->sc_dev)); 478 479 return (0); 480 } 481 482 int 483 ucomread(dev_t dev, struct uio *uio, int flag) 484 { 485 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 486 struct tty *tp = sc->sc_tty; 487 int error; 488 489 if (sc->sc_dying) 490 return (EIO); 491 492 sc->sc_refcnt++; 493 error = ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 494 if (--sc->sc_refcnt < 0) 495 usb_detach_wakeup(USBDEV(sc->sc_dev)); 496 return (error); 497 } 498 499 int 500 ucomwrite(dev_t dev, struct uio *uio, int flag) 501 { 502 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 503 struct tty *tp = sc->sc_tty; 504 int error; 505 506 if (sc->sc_dying) 507 return (EIO); 508 509 sc->sc_refcnt++; 510 error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 511 if (--sc->sc_refcnt < 0) 512 usb_detach_wakeup(USBDEV(sc->sc_dev)); 513 return (error); 514 } 515 516 struct tty * 517 ucomtty(dev_t dev) 518 { 519 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 520 struct tty *tp = sc->sc_tty; 521 522 return (tp); 523 } 524 525 int 526 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 527 { 528 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; 529 int error; 530 531 sc->sc_refcnt++; 532 error = ucom_do_ioctl(sc, cmd, data, flag, p); 533 if (--sc->sc_refcnt < 0) 534 usb_detach_wakeup(USBDEV(sc->sc_dev)); 535 return (error); 536 } 537 538 Static int 539 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data, 540 int flag, struct proc *p) 541 { 542 struct tty *tp = sc->sc_tty; 543 int error; 544 int s; 545 546 if (sc->sc_dying) 547 return (EIO); 548 549 DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); 550 551 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 552 if (error >= 0) 553 return (error); 554 555 error = ttioctl(tp, cmd, data, flag, p); 556 if (error >= 0) 557 return (error); 558 559 if (sc->sc_methods->ucom_ioctl != NULL) { 560 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 561 sc->sc_portno, cmd, data, flag, p); 562 if (error >= 0) 563 return (error); 564 } 565 566 error = 0; 567 568 DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); 569 s = spltty(); 570 571 switch (cmd) { 572 case TIOCSBRK: 573 ucom_break(sc, 1); 574 break; 575 576 case TIOCCBRK: 577 ucom_break(sc, 0); 578 break; 579 580 case TIOCSDTR: 581 ucom_dtr(sc, 1); 582 break; 583 584 case TIOCCDTR: 585 ucom_dtr(sc, 0); 586 break; 587 588 case TIOCGFLAGS: 589 *(int *)data = sc->sc_swflags; 590 break; 591 592 case TIOCSFLAGS: 593 error = suser(p->p_ucred, &p->p_acflag); 594 if (error) 595 break; 596 sc->sc_swflags = *(int *)data; 597 break; 598 599 case TIOCMSET: 600 case TIOCMBIS: 601 case TIOCMBIC: 602 tiocm_to_ucom(sc, cmd, *(int *)data); 603 break; 604 605 case TIOCMGET: 606 *(int *)data = ucom_to_tiocm(sc); 607 break; 608 609 default: 610 error = ENOTTY; 611 break; 612 } 613 614 splx(s); 615 616 return (error); 617 } 618 619 Static void 620 tiocm_to_ucom(struct ucom_softc *sc, int how, int ttybits) 621 { 622 u_char combits; 623 624 combits = 0; 625 if (ISSET(ttybits, TIOCM_DTR)) 626 SET(combits, UMCR_DTR); 627 if (ISSET(ttybits, TIOCM_RTS)) 628 SET(combits, UMCR_RTS); 629 630 switch (how) { 631 case TIOCMBIC: 632 CLR(sc->sc_mcr, combits); 633 break; 634 635 case TIOCMBIS: 636 SET(sc->sc_mcr, combits); 637 break; 638 639 case TIOCMSET: 640 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 641 SET(sc->sc_mcr, combits); 642 break; 643 } 644 645 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 646 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 647 } 648 649 Static int 650 ucom_to_tiocm(struct ucom_softc *sc) 651 { 652 u_char combits; 653 int ttybits = 0; 654 655 combits = sc->sc_mcr; 656 if (ISSET(combits, UMCR_DTR)) 657 SET(ttybits, TIOCM_DTR); 658 if (ISSET(combits, UMCR_RTS)) 659 SET(ttybits, TIOCM_RTS); 660 661 combits = sc->sc_msr; 662 if (ISSET(combits, UMSR_DCD)) 663 SET(ttybits, TIOCM_CD); 664 if (ISSET(combits, UMSR_CTS)) 665 SET(ttybits, TIOCM_CTS); 666 if (ISSET(combits, UMSR_DSR)) 667 SET(ttybits, TIOCM_DSR); 668 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 669 SET(ttybits, TIOCM_RI); 670 671 #if 0 672 XXX; 673 if (sc->sc_ier != 0) 674 SET(ttybits, TIOCM_LE); 675 #endif 676 677 return (ttybits); 678 } 679 680 Static void 681 ucom_break(sc, onoff) 682 struct ucom_softc *sc; 683 int onoff; 684 { 685 DPRINTF(("ucom_break: 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_BREAK, onoff); 690 } 691 692 Static void 693 ucom_dtr(struct ucom_softc *sc, int onoff) 694 { 695 DPRINTF(("ucom_dtr: 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_DTR, onoff); 700 } 701 702 Static void 703 ucom_rts(struct ucom_softc *sc, int onoff) 704 { 705 DPRINTF(("ucom_rts: onoff=%d\n", onoff)); 706 707 if (sc->sc_methods->ucom_set != NULL) 708 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 709 UCOM_SET_RTS, onoff); 710 } 711 712 void 713 ucom_status_change(struct ucom_softc *sc) 714 { 715 if (sc->sc_methods->ucom_get_status != NULL) { 716 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 717 &sc->sc_lsr, &sc->sc_msr); 718 } else { 719 sc->sc_lsr = 0; 720 sc->sc_msr = 0; 721 } 722 } 723 724 Static int 725 ucomparam(struct tty *tp, struct termios *t) 726 { 727 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 728 int error; 729 730 if (sc->sc_dying) 731 return (EIO); 732 733 /* Check requested parameters. */ 734 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 735 return (EINVAL); 736 737 /* 738 * For the console, always force CLOCAL and !HUPCL, so that the port 739 * is always active. 740 */ 741 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 742 SET(t->c_cflag, CLOCAL); 743 CLR(t->c_cflag, HUPCL); 744 } 745 746 /* 747 * If there were no changes, don't do anything. This avoids dropping 748 * input and improves performance when all we did was frob things like 749 * VMIN and VTIME. 750 */ 751 if (tp->t_ospeed == t->c_ospeed && 752 tp->t_cflag == t->c_cflag) 753 return (0); 754 755 //XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 756 757 /* And copy to tty. */ 758 tp->t_ispeed = 0; 759 tp->t_ospeed = t->c_ospeed; 760 tp->t_cflag = t->c_cflag; 761 762 if (sc->sc_methods->ucom_param != NULL) { 763 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 764 t); 765 if (error) 766 return (error); 767 } 768 769 // XXX worry about CHWFLOW 770 771 /* 772 * Update the tty layer's idea of the carrier bit, in case we changed 773 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 774 * explicit request. 775 */ 776 DPRINTF(("ucomparam: l_modem\n")); 777 (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); 778 779 #if 0 780 XXX what if the hardware is not open 781 if (!ISSET(t->c_cflag, CHWFLOW)) { 782 if (sc->sc_tx_stopped) { 783 sc->sc_tx_stopped = 0; 784 ucomstart(tp); 785 } 786 } 787 #endif 788 789 return (0); 790 } 791 792 /* 793 * (un)block input via hw flowcontrol 794 */ 795 Static void 796 ucom_hwiflow(struct ucom_softc *sc) 797 { 798 DPRINTF(("ucom_hwiflow:\n")); 799 #if 0 800 XXX 801 bus_space_tag_t iot = sc->sc_iot; 802 bus_space_handle_t ioh = sc->sc_ioh; 803 804 if (sc->sc_mcr_rts == 0) 805 return; 806 807 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 808 CLR(sc->sc_mcr, sc->sc_mcr_rts); 809 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 810 } else { 811 SET(sc->sc_mcr, sc->sc_mcr_rts); 812 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 813 } 814 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 815 #endif 816 } 817 818 Static void 819 ucomstart(struct tty *tp) 820 { 821 struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; 822 usbd_status err; 823 int s; 824 u_char *data; 825 int cnt; 826 827 if (sc->sc_dying) 828 return; 829 830 s = spltty(); 831 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { 832 DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); 833 goto out; 834 } 835 if (sc->sc_tx_stopped) 836 goto out; 837 838 if (tp->t_outq.c_cc <= tp->t_lowat) { 839 if (ISSET(tp->t_state, TS_ASLEEP)) { 840 CLR(tp->t_state, TS_ASLEEP); 841 wakeup(&tp->t_outq); 842 } 843 selwakeup(&tp->t_wsel); 844 if (tp->t_outq.c_cc == 0) 845 goto out; 846 } 847 848 /* Grab the first contiguous region of buffer space. */ 849 data = tp->t_outq.c_cf; 850 cnt = ndqb(&tp->t_outq, 0); 851 852 if (cnt == 0) { 853 DPRINTF(("ucomstart: cnt==0\n")); 854 goto out; 855 } 856 857 SET(tp->t_state, TS_BUSY); 858 859 if (cnt > sc->sc_obufsize) { 860 DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); 861 cnt = sc->sc_obufsize; 862 } 863 if (sc->sc_methods->ucom_write != NULL) 864 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 865 sc->sc_obuf, data, &cnt); 866 else 867 memcpy(sc->sc_obuf, data, cnt); 868 869 DPRINTFN(4,("ucomstart: %d chars\n", cnt)); 870 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, 871 (usbd_private_handle)sc, sc->sc_obuf, cnt, 872 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); 873 /* What can we do on error? */ 874 err = usbd_transfer(sc->sc_oxfer); 875 #ifdef DIAGNOSTIC 876 if (err != USBD_IN_PROGRESS) 877 printf("ucomstart: err=%s\n", usbd_errstr(err)); 878 #endif 879 880 out: 881 splx(s); 882 } 883 884 void 885 ucomstop(struct tty *tp, int flag) 886 { 887 DPRINTF(("ucomstop: flag=%d\n", flag)); 888 #if 0 889 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ 890 int s; 891 892 s = spltty(); 893 if (ISSET(tp->t_state, TS_BUSY)) { 894 DPRINTF(("ucomstop: XXX\n")); 895 /* sc->sc_tx_stopped = 1; */ 896 if (!ISSET(tp->t_state, TS_TTSTOP)) 897 SET(tp->t_state, TS_FLUSH); 898 } 899 splx(s); 900 #endif 901 } 902 903 Static void 904 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 905 { 906 struct ucom_softc *sc = (struct ucom_softc *)p; 907 struct tty *tp = sc->sc_tty; 908 u_int32_t cc; 909 int s; 910 911 DPRINTFN(5,("ucomwritecb: status=%d\n", status)); 912 913 if (status == USBD_CANCELLED) 914 return; 915 916 if (status) { 917 DPRINTF(("ucomwritecb: status=%d\n", status)); 918 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 919 /* XXX we should restart after some delay. */ 920 return; 921 } 922 923 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); 924 DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); 925 /* convert from USB bytes to tty bytes */ 926 cc -= sc->sc_opkthdrlen; 927 928 s = spltty(); 929 CLR(tp->t_state, TS_BUSY); 930 if (ISSET(tp->t_state, TS_FLUSH)) 931 CLR(tp->t_state, TS_FLUSH); 932 else 933 ndflush(&tp->t_outq, cc); 934 (*linesw[tp->t_line].l_start)(tp); 935 splx(s); 936 } 937 938 Static usbd_status 939 ucomstartread(struct ucom_softc *sc) 940 { 941 usbd_status err; 942 943 DPRINTFN(5,("ucomstartread: start\n")); 944 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, 945 (usbd_private_handle)sc, 946 sc->sc_ibuf, sc->sc_ibufsize, 947 USBD_SHORT_XFER_OK | USBD_NO_COPY, 948 USBD_NO_TIMEOUT, ucomreadcb); 949 err = usbd_transfer(sc->sc_ixfer); 950 if (err != USBD_IN_PROGRESS) { 951 DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); 952 return (err); 953 } 954 return (USBD_NORMAL_COMPLETION); 955 } 956 957 Static void 958 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status) 959 { 960 struct ucom_softc *sc = (struct ucom_softc *)p; 961 struct tty *tp = sc->sc_tty; 962 int (*rint)(int c, struct tty *tp) = linesw[tp->t_line].l_rint; 963 usbd_status err; 964 u_int32_t cc; 965 u_char *cp; 966 int s; 967 968 if (status == USBD_CANCELLED) 969 return; 970 971 if (status) { 972 DPRINTF(("ucomreadcb: status=%d\n", status)); 973 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 974 /* XXX we should restart after some delay. */ 975 return; 976 } 977 978 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); 979 DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); 980 if (sc->sc_methods->ucom_read != NULL) 981 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 982 &cp, &cc); 983 984 s = spltty(); 985 /* Give characters to tty layer. */ 986 while (cc-- > 0) { 987 DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); 988 if ((*rint)(*cp++, tp) == -1) { 989 /* XXX what should we do? */ 990 printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), 991 cc); 992 break; 993 } 994 } 995 splx(s); 996 997 err = ucomstartread(sc); 998 if (err) { 999 printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); 1000 /* XXX what should we dow now? */ 1001 } 1002 } 1003 1004 Static void 1005 ucom_cleanup(struct ucom_softc *sc) 1006 { 1007 DPRINTF(("ucom_cleanup: closing pipes\n")); 1008 1009 ucom_shutdown(sc); 1010 usbd_abort_pipe(sc->sc_bulkin_pipe); 1011 usbd_close_pipe(sc->sc_bulkin_pipe); 1012 usbd_abort_pipe(sc->sc_bulkout_pipe); 1013 usbd_close_pipe(sc->sc_bulkout_pipe); 1014 usbd_free_xfer(sc->sc_ixfer); 1015 usbd_free_xfer(sc->sc_oxfer); 1016 } 1017 1018 #endif /* NUCOM > 0 */ 1019 1020 int 1021 ucomprint(void *aux, const char *pnp) 1022 { 1023 1024 if (pnp) 1025 printf("ucom at %s\n", pnp); 1026 return (UNCONF); 1027 } 1028 1029 int 1030 ucomsubmatch(struct device *parent, struct cfdata *cf, void *aux) 1031 { 1032 struct ucom_attach_args *uca = aux; 1033 1034 if (uca->portno != UCOM_UNK_PORTNO && 1035 cf->ucomcf_portno != UCOM_UNK_PORTNO && 1036 cf->ucomcf_portno != uca->portno) 1037 return (0); 1038 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 1039 } 1040
Indexes created Mon Oct 20 20:10:13 GMT 2025