ucom.c revision 1.108.2.9
1 /* $NetBSD: ucom.c,v 1.108.2.9 2015/10/06 21:32:15 skrll 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * This code is very heavily based on the 16550 driver, com.c. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.108.2.9 2015/10/06 21:32:15 skrll Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/ioctl.h> 43 #include <sys/conf.h> 44 #include <sys/tty.h> 45 #include <sys/file.h> 46 #include <sys/select.h> 47 #include <sys/proc.h> 48 #include <sys/vnode.h> 49 #include <sys/device.h> 50 #include <sys/poll.h> 51 #include <sys/queue.h> 52 #include <sys/kauth.h> 53 #include <sys/sysctl.h> 54 #include <sys/timepps.h> 55 #include <sys/rndsource.h> 56 57 #include <dev/usb/usb.h> 58 59 #include <dev/usb/usbdi.h> 60 #include <dev/usb/usbdi_util.h> 61 #include <dev/usb/usbdevs.h> 62 #include <dev/usb/usb_quirks.h> 63 #include <dev/usb/usbhist.h> 64 65 #include <dev/usb/ucomvar.h> 66 67 #include "ucom.h" 68 69 #include "locators.h" 70 71 #if NUCOM > 0 72 73 #ifdef USB_DEBUG 74 #ifndef UCOM_DEBUG 75 #define ucomdebug 0 76 #else 77 int ucomdebug = 0; 78 79 SYSCTL_SETUP(sysctl_hw_ucom_setup, "sysctl hw.ucom setup") 80 { 81 int err; 82 const struct sysctlnode *rnode; 83 const struct sysctlnode *cnode; 84 85 err = sysctl_createv(clog, 0, NULL, &rnode, 86 CTLFLAG_PERMANENT, CTLTYPE_NODE, "ucom", 87 SYSCTL_DESCR("ucom global controls"), 88 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 89 90 if (err) 91 goto fail; 92 93 /* control debugging printfs */ 94 err = sysctl_createv(clog, 0, &rnode, &cnode, 95 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 96 "debug", SYSCTL_DESCR("Enable debugging output"), 97 NULL, 0, &ucomdebug, sizeof(ucomdebug), CTL_CREATE, CTL_EOL); 98 if (err) 99 goto fail; 100 101 return; 102 fail: 103 aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err); 104 } 105 106 #endif /* UCOM_DEBUG */ 107 #endif /* USB_DEBUG */ 108 109 #define DPRINTF(FMT,A,B,C,D) USBHIST_LOGN(ucomdebug,1,FMT,A,B,C,D) 110 #define DPRINTFN(N,FMT,A,B,C,D) USBHIST_LOGN(ucomdebug,N,FMT,A,B,C,D) 111 #define UCOMHIST_FUNC() USBHIST_FUNC() 112 #define UCOMHIST_CALLED(name) USBHIST_CALLED(ucomdebug) 113 114 #define UCOMCALLUNIT_MASK TTCALLUNIT_MASK 115 #define UCOMUNIT_MASK TTUNIT_MASK 116 #define UCOMDIALOUT_MASK TTDIALOUT_MASK 117 118 #define UCOMCALLUNIT(x) TTCALLUNIT(x) 119 #define UCOMUNIT(x) TTUNIT(x) 120 #define UCOMDIALOUT(x) TTDIALOUT(x) 121 122 /* 123 * XXX: We can submit multiple input/output buffers to the usb stack 124 * to improve throughput, but the usb stack is too lame to deal with this 125 * in a number of places. 126 */ 127 #define UCOM_IN_BUFFS 1 128 #define UCOM_OUT_BUFFS 1 129 130 struct ucom_buffer { 131 SIMPLEQ_ENTRY(ucom_buffer) ub_link; 132 struct usbd_xfer *ub_xfer; 133 u_char *ub_data; 134 u_int ub_len; 135 u_int ub_index; 136 }; 137 138 struct ucom_softc { 139 device_t sc_dev; /* base device */ 140 141 struct usbd_device * sc_udev; /* USB device */ 142 143 struct usbd_interface * sc_iface; /* data interface */ 144 145 int sc_bulkin_no; /* bulk in endpoint address */ 146 struct usbd_pipe * sc_bulkin_pipe; /* bulk in pipe */ 147 u_int sc_ibufsize; /* read buffer size */ 148 u_int sc_ibufsizepad; /* read buffer size padded */ 149 struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; 150 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; 151 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; 152 153 int sc_bulkout_no; /* bulk out endpoint address */ 154 struct usbd_pipe * sc_bulkout_pipe;/* bulk out pipe */ 155 u_int sc_obufsize; /* write buffer size */ 156 u_int sc_opkthdrlen; /* header length of */ 157 struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; 158 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; 159 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; 160 161 void *sc_si; 162 163 const struct ucom_methods *sc_methods; 164 void *sc_parent; 165 int sc_portno; 166 167 struct tty *sc_tty; /* our tty */ 168 u_char sc_lsr; 169 u_char sc_msr; 170 u_char sc_mcr; 171 volatile u_char sc_rx_stopped; 172 u_char sc_rx_unblock; 173 u_char sc_tx_stopped; 174 int sc_swflags; 175 176 u_char sc_opening; /* lock during open */ 177 int sc_refcnt; 178 u_char sc_dying; /* disconnecting */ 179 180 struct pps_state sc_pps_state; /* pps state */ 181 182 krndsource_t sc_rndsource; /* random source */ 183 184 kmutex_t *sc_lock; 185 kcondvar_t sc_opencv; 186 kcondvar_t sc_detachcv; 187 }; 188 189 dev_type_open(ucomopen); 190 dev_type_close(ucomclose); 191 dev_type_read(ucomread); 192 dev_type_write(ucomwrite); 193 dev_type_ioctl(ucomioctl); 194 dev_type_stop(ucomstop); 195 dev_type_tty(ucomtty); 196 dev_type_poll(ucompoll); 197 198 const struct cdevsw ucom_cdevsw = { 199 .d_open = ucomopen, 200 .d_close = ucomclose, 201 .d_read = ucomread, 202 .d_write = ucomwrite, 203 .d_ioctl = ucomioctl, 204 .d_stop = ucomstop, 205 .d_tty = ucomtty, 206 .d_poll = ucompoll, 207 .d_mmap = nommap, 208 .d_kqfilter = ttykqfilter, 209 .d_discard = nodiscard, 210 .d_flag = D_TTY | D_MPSAFE 211 }; 212 213 static void ucom_cleanup(struct ucom_softc *); 214 static int ucomparam(struct tty *, struct termios *); 215 static int ucomhwiflow(struct tty *, int); 216 static void ucomstart(struct tty *); 217 static void ucom_shutdown(struct ucom_softc *); 218 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 219 int, struct lwp *); 220 static void ucom_dtr(struct ucom_softc *, int); 221 static void ucom_rts(struct ucom_softc *, int); 222 static void ucom_break(struct ucom_softc *, int); 223 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 224 static int ucom_to_tiocm(struct ucom_softc *); 225 226 static void ucomreadcb(struct usbd_xfer *, void *, usbd_status); 227 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 228 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 229 usbd_status); 230 231 static void ucomwritecb(struct usbd_xfer *, void *, usbd_status); 232 static void ucom_read_complete(struct ucom_softc *); 233 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 234 static void ucom_softintr(void *); 235 236 int ucom_match(device_t, cfdata_t, void *); 237 void ucom_attach(device_t, device_t, void *); 238 int ucom_detach(device_t, int); 239 int ucom_activate(device_t, enum devact); 240 extern struct cfdriver ucom_cd; 241 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 242 ucom_detach, ucom_activate); 243 244 int 245 ucom_match(device_t parent, cfdata_t match, void *aux) 246 { 247 return 1; 248 } 249 250 void 251 ucom_attach(device_t parent, device_t self, void *aux) 252 { 253 struct ucom_softc *sc = device_private(self); 254 struct ucom_attach_args *uca = aux; 255 struct tty *tp; 256 257 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 258 259 if (uca->info != NULL) 260 aprint_normal(": %s", uca->info); 261 aprint_normal("\n"); 262 263 sc->sc_dev = self; 264 sc->sc_udev = uca->device; 265 sc->sc_iface = uca->iface; 266 sc->sc_bulkout_no = uca->bulkout; 267 sc->sc_bulkin_no = uca->bulkin; 268 sc->sc_ibufsize = uca->ibufsize; 269 sc->sc_ibufsizepad = uca->ibufsizepad; 270 sc->sc_obufsize = uca->obufsize; 271 sc->sc_opkthdrlen = uca->opkthdrlen; 272 sc->sc_methods = uca->methods; 273 sc->sc_parent = uca->arg; 274 sc->sc_portno = uca->portno; 275 276 sc->sc_lsr = 0; 277 sc->sc_msr = 0; 278 sc->sc_mcr = 0; 279 sc->sc_tx_stopped = 0; 280 sc->sc_swflags = 0; 281 sc->sc_opening = 0; 282 sc->sc_refcnt = 0; 283 sc->sc_dying = 0; 284 285 sc->sc_si = softint_establish(SOFTINT_USB, ucom_softintr, sc); 286 sc->sc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTUSB); 287 cv_init(&sc->sc_opencv, "ucomopen"); 288 cv_init(&sc->sc_detachcv, "ucomdtch"); 289 290 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 291 SIMPLEQ_INIT(&sc->sc_ibuff_full); 292 SIMPLEQ_INIT(&sc->sc_obuff_free); 293 SIMPLEQ_INIT(&sc->sc_obuff_full); 294 295 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 296 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 297 298 DPRINTF("open pipes in=%d out=%d", sc->sc_bulkin_no, sc->sc_bulkout_no, 299 0, 0); 300 301 struct ucom_buffer *ub; 302 usbd_status err; 303 int error; 304 305 /* Open the bulk pipes */ 306 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 307 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 308 if (err) { 309 DPRINTF("open bulk in error (addr %d), err=%d", 310 sc->sc_bulkin_no, err, 0, 0); 311 error = EIO; 312 goto fail_0; 313 } 314 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 315 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 316 if (err) { 317 DPRINTF("open bulk out error (addr %d), err=%d", 318 sc->sc_bulkout_no, err, 0, 0); 319 error = EIO; 320 goto fail_1; 321 } 322 323 /* Allocate input buffers */ 324 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 325 ub++) { 326 error = usbd_create_xfer(sc->sc_bulkin_pipe, sc->sc_ibufsizepad, 327 USBD_SHORT_XFER_OK, 0, &ub->ub_xfer); 328 if (error) 329 goto fail_2; 330 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 331 } 332 333 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 334 ub++) { 335 error = usbd_create_xfer(sc->sc_bulkout_pipe, sc->sc_obufsize, 336 0, 0, &ub->ub_xfer); 337 if (error) 338 goto fail_2; 339 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 340 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 341 } 342 343 tp = tty_alloc(); 344 tp->t_oproc = ucomstart; 345 tp->t_param = ucomparam; 346 tp->t_hwiflow = ucomhwiflow; 347 sc->sc_tty = tp; 348 349 DPRINTF("tty_attach %p", tp, 0, 0, 0); 350 tty_attach(tp); 351 352 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 353 RND_TYPE_TTY, RND_FLAG_DEFAULT); 354 355 if (!pmf_device_register(self, NULL, NULL)) 356 aprint_error_dev(self, "couldn't establish power handler\n"); 357 return; 358 359 fail_2: 360 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 361 ub++) { 362 if (ub->ub_xfer) 363 usbd_destroy_xfer(ub->ub_xfer); 364 } 365 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 366 ub++) { 367 if (ub->ub_xfer) 368 usbd_destroy_xfer(ub->ub_xfer); 369 } 370 371 fail_1: 372 usbd_close_pipe(sc->sc_bulkin_pipe); 373 374 fail_0: 375 aprint_error_dev(self, "attach failed, error=%d\n", error); 376 377 return; 378 } 379 380 int 381 ucom_detach(device_t self, int flags) 382 { 383 struct ucom_softc *sc = device_private(self); 384 struct tty *tp = sc->sc_tty; 385 int maj, mn; 386 int i; 387 388 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 389 390 DPRINTF("sc=%p flags=%d tp=%p", sc, flags, tp, 0); 391 DPRINTF("... pipe=%d,%d",sc->sc_bulkin_no, sc->sc_bulkout_no, 0, 0); 392 393 mutex_enter(sc->sc_lock); 394 sc->sc_dying = 1; 395 mutex_exit(sc->sc_lock); 396 397 pmf_device_deregister(self); 398 399 if (sc->sc_bulkin_pipe != NULL) 400 usbd_abort_pipe(sc->sc_bulkin_pipe); 401 if (sc->sc_bulkout_pipe != NULL) 402 usbd_abort_pipe(sc->sc_bulkout_pipe); 403 404 mutex_enter(sc->sc_lock); 405 while (sc->sc_refcnt > 0) { 406 /* Wake up anyone waiting */ 407 if (tp != NULL) { 408 mutex_spin_enter(&tty_lock); 409 CLR(tp->t_state, TS_CARR_ON); 410 CLR(tp->t_cflag, CLOCAL | MDMBUF); 411 ttyflush(tp, FREAD|FWRITE); 412 mutex_spin_exit(&tty_lock); 413 } 414 /* Wait for processes to go away. */ 415 usb_detach_wait(sc->sc_dev, &sc->sc_detachcv, sc->sc_lock); 416 } 417 418 softint_disestablish(sc->sc_si); 419 mutex_exit(sc->sc_lock); 420 421 /* locate the major number */ 422 maj = cdevsw_lookup_major(&ucom_cdevsw); 423 424 /* Nuke the vnodes for any open instances. */ 425 mn = device_unit(self); 426 DPRINTF("maj=%d mn=%d\n", maj, mn, 0, 0); 427 vdevgone(maj, mn, mn, VCHR); 428 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 429 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 430 431 /* Detach and free the tty. */ 432 if (tp != NULL) { 433 tty_detach(tp); 434 tty_free(tp); 435 sc->sc_tty = NULL; 436 } 437 438 for (i = 0; i < UCOM_IN_BUFFS; i++) { 439 if (sc->sc_ibuff[i].ub_xfer != NULL) 440 usbd_destroy_xfer(sc->sc_ibuff[i].ub_xfer); 441 } 442 443 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 444 if (sc->sc_obuff[i].ub_xfer != NULL) 445 usbd_destroy_xfer(sc->sc_obuff[i].ub_xfer); 446 } 447 448 /* Detach the random source */ 449 rnd_detach_source(&sc->sc_rndsource); 450 451 mutex_destroy(sc->sc_lock); 452 cv_destroy(&sc->sc_opencv); 453 cv_destroy(&sc->sc_detachcv); 454 455 return 0; 456 } 457 458 int 459 ucom_activate(device_t self, enum devact act) 460 { 461 struct ucom_softc *sc = device_private(self); 462 463 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 464 465 DPRINTFN(5, "%d", act, 0, 0, 0); 466 467 switch (act) { 468 case DVACT_DEACTIVATE: 469 mutex_enter(sc->sc_lock); 470 sc->sc_dying = 1; 471 mutex_exit(sc->sc_lock); 472 return 0; 473 default: 474 return EOPNOTSUPP; 475 } 476 } 477 478 void 479 ucom_shutdown(struct ucom_softc *sc) 480 { 481 struct tty *tp = sc->sc_tty; 482 483 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 484 485 KASSERT(mutex_owned(sc->sc_lock)); 486 /* 487 * Hang up if necessary. Wait a bit, so the other side has time to 488 * notice even if we immediately open the port again. 489 */ 490 if (ISSET(tp->t_cflag, HUPCL)) { 491 ucom_dtr(sc, 0); 492 /* XXX will only timeout */ 493 (void) kpause(ttclos, false, hz, sc->sc_lock); 494 } 495 } 496 497 int 498 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 499 { 500 int unit = UCOMUNIT(dev); 501 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 502 struct ucom_buffer *ub; 503 struct tty *tp; 504 int error; 505 506 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 507 508 if (sc == NULL) 509 return ENXIO; 510 511 mutex_enter(sc->sc_lock); 512 if (sc->sc_dying) { 513 mutex_exit(sc->sc_lock); 514 return EIO; 515 } 516 517 if (!device_is_active(sc->sc_dev)) { 518 mutex_exit(sc->sc_lock); 519 return ENXIO; 520 } 521 522 tp = sc->sc_tty; 523 524 DPRINTF("unit=%d, tp=%p\n", unit, tp, 0, 0); 525 526 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) { 527 mutex_exit(sc->sc_lock); 528 return EBUSY; 529 } 530 531 /* 532 * Do the following iff this is a first open. 533 */ 534 while (sc->sc_opening) { 535 error = cv_wait_sig(&sc->sc_opencv, sc->sc_lock); 536 537 if (error) { 538 mutex_exit(sc->sc_lock); 539 return error; 540 } 541 } 542 543 sc->sc_opening = 1; 544 545 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 546 struct termios t; 547 548 tp->t_dev = dev; 549 550 if (sc->sc_methods->ucom_open != NULL) { 551 error = sc->sc_methods->ucom_open(sc->sc_parent, 552 sc->sc_portno); 553 if (error) { 554 ucom_cleanup(sc); 555 sc->sc_opening = 0; 556 cv_signal(&sc->sc_opencv); 557 mutex_exit(sc->sc_lock); 558 return error; 559 } 560 } 561 562 ucom_status_change(sc); 563 564 /* Clear PPS capture state on first open. */ 565 mutex_spin_enter(&timecounter_lock); 566 memset(&sc->sc_pps_state, 0, sizeof(sc->sc_pps_state)); 567 sc->sc_pps_state.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 568 pps_init(&sc->sc_pps_state); 569 mutex_spin_exit(&timecounter_lock); 570 571 /* 572 * Initialize the termios status to the defaults. Add in the 573 * sticky bits from TIOCSFLAGS. 574 */ 575 t.c_ispeed = 0; 576 t.c_ospeed = TTYDEF_SPEED; 577 t.c_cflag = TTYDEF_CFLAG; 578 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 579 SET(t.c_cflag, CLOCAL); 580 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 581 SET(t.c_cflag, CRTSCTS); 582 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 583 SET(t.c_cflag, MDMBUF); 584 /* Make sure ucomparam() will do something. */ 585 tp->t_ospeed = 0; 586 (void) ucomparam(tp, &t); 587 tp->t_iflag = TTYDEF_IFLAG; 588 tp->t_oflag = TTYDEF_OFLAG; 589 tp->t_lflag = TTYDEF_LFLAG; 590 ttychars(tp); 591 ttsetwater(tp); 592 593 /* 594 * Turn on DTR. We must always do this, even if carrier is not 595 * present, because otherwise we'd have to use TIOCSDTR 596 * immediately after setting CLOCAL, which applications do not 597 * expect. We always assert DTR while the device is open 598 * unless explicitly requested to deassert it. Ditto RTS. 599 */ 600 ucom_dtr(sc, 1); 601 ucom_rts(sc, 1); 602 603 sc->sc_rx_unblock = 0; 604 sc->sc_rx_stopped = 0; 605 sc->sc_tx_stopped = 0; 606 607 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 608 ub++) { 609 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 610 error = EIO; 611 goto fail_2; 612 } 613 } 614 } 615 sc->sc_opening = 0; 616 cv_signal(&sc->sc_opencv); 617 mutex_exit(sc->sc_lock); 618 619 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 620 if (error) 621 goto bad; 622 623 error = (*tp->t_linesw->l_open)(dev, tp); 624 if (error) 625 goto bad; 626 627 return 0; 628 629 fail_2: 630 usbd_abort_pipe(sc->sc_bulkin_pipe); 631 usbd_abort_pipe(sc->sc_bulkout_pipe); 632 633 mutex_enter(sc->sc_lock); 634 sc->sc_opening = 0; 635 cv_signal(&sc->sc_opencv); 636 mutex_exit(sc->sc_lock); 637 638 return error; 639 640 bad: 641 mutex_spin_enter(&tty_lock); 642 CLR(tp->t_state, TS_BUSY); 643 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 644 /* 645 * We failed to open the device, and nobody else had it opened. 646 * Clean up the state as appropriate. 647 */ 648 ucom_cleanup(sc); 649 } 650 mutex_spin_exit(&tty_lock); 651 652 return error; 653 } 654 655 int 656 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 657 { 658 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 659 struct tty *tp; 660 661 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 662 663 DPRINTF("unit=%d", UCOMUNIT(dev), 0, 0, 0); 664 665 if (sc == NULL) 666 return 0; 667 668 mutex_enter(sc->sc_lock); 669 tp = sc->sc_tty; 670 671 if (!ISSET(tp->t_state, TS_ISOPEN)) { 672 goto out; 673 } 674 675 sc->sc_refcnt++; 676 677 (*tp->t_linesw->l_close)(tp, flag); 678 ttyclose(tp); 679 680 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 681 /* 682 * Although we got a last close, the device may still be in 683 * use; e.g. if this was the dialout node, and there are still 684 * processes waiting for carrier on the non-dialout node. 685 */ 686 ucom_cleanup(sc); 687 } 688 689 if (sc->sc_methods->ucom_close != NULL) 690 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 691 692 if (--sc->sc_refcnt < 0) 693 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 694 695 out: 696 mutex_exit(sc->sc_lock); 697 698 return 0; 699 } 700 701 int 702 ucomread(dev_t dev, struct uio *uio, int flag) 703 { 704 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 705 struct tty *tp; 706 int error; 707 708 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 709 710 if (sc == NULL) 711 return EIO; 712 713 mutex_enter(sc->sc_lock); 714 if (sc->sc_dying) { 715 mutex_exit(sc->sc_lock); 716 return EIO; 717 } 718 719 tp = sc->sc_tty; 720 721 sc->sc_refcnt++; 722 mutex_exit(sc->sc_lock); 723 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 724 mutex_enter(sc->sc_lock); 725 726 if (--sc->sc_refcnt < 0) 727 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 728 mutex_exit(sc->sc_lock); 729 730 return error; 731 } 732 733 int 734 ucomwrite(dev_t dev, struct uio *uio, int flag) 735 { 736 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 737 struct tty *tp; 738 int error; 739 740 if (sc == NULL) 741 return EIO; 742 743 mutex_enter(sc->sc_lock); 744 if (sc->sc_dying) { 745 mutex_exit(sc->sc_lock); 746 return EIO; 747 } 748 749 tp = sc->sc_tty; 750 751 sc->sc_refcnt++; 752 mutex_exit(sc->sc_lock); 753 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 754 mutex_enter(sc->sc_lock); 755 if (--sc->sc_refcnt < 0) 756 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 757 mutex_exit(sc->sc_lock); 758 759 return error; 760 } 761 762 int 763 ucompoll(dev_t dev, int events, struct lwp *l) 764 { 765 struct ucom_softc *sc; 766 struct tty *tp; 767 int revents; 768 769 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 770 if (sc == NULL) 771 return POLLHUP; 772 773 mutex_enter(sc->sc_lock); 774 if (sc->sc_dying) { 775 mutex_exit(sc->sc_lock); 776 return POLLHUP; 777 } 778 tp = sc->sc_tty; 779 780 sc->sc_refcnt++; 781 mutex_exit(sc->sc_lock); 782 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 783 mutex_enter(sc->sc_lock); 784 if (--sc->sc_refcnt < 0) 785 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 786 mutex_exit(sc->sc_lock); 787 788 return revents; 789 } 790 791 struct tty * 792 ucomtty(dev_t dev) 793 { 794 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 795 796 return sc != NULL ? sc->sc_tty : NULL; 797 } 798 799 int 800 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 801 { 802 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 803 int error; 804 805 if (sc == NULL) 806 return EIO; 807 808 mutex_enter(sc->sc_lock); 809 if (sc->sc_dying) { 810 mutex_exit(sc->sc_lock); 811 return EIO; 812 } 813 814 sc->sc_refcnt++; 815 error = ucom_do_ioctl(sc, cmd, data, flag, l); 816 if (--sc->sc_refcnt < 0) 817 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 818 mutex_exit(sc->sc_lock); 819 return error; 820 } 821 822 static int 823 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 824 int flag, struct lwp *l) 825 { 826 struct tty *tp = sc->sc_tty; 827 int error; 828 829 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 830 831 DPRINTF("cmd=0x%08lx", cmd, 0, 0, 0); 832 833 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 834 if (error != EPASSTHROUGH) 835 return error; 836 837 error = ttioctl(tp, cmd, data, flag, l); 838 if (error != EPASSTHROUGH) 839 return error; 840 841 if (sc->sc_methods->ucom_ioctl != NULL) { 842 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 843 sc->sc_portno, cmd, data, flag, l->l_proc); 844 if (error != EPASSTHROUGH) 845 return error; 846 } 847 848 error = 0; 849 850 DPRINTF("our cmd=0x%08lx", cmd, 0, 0, 0); 851 //mutex_enter(&tty_lock); 852 853 switch (cmd) { 854 case TIOCSBRK: 855 ucom_break(sc, 1); 856 break; 857 858 case TIOCCBRK: 859 ucom_break(sc, 0); 860 break; 861 862 case TIOCSDTR: 863 ucom_dtr(sc, 1); 864 break; 865 866 case TIOCCDTR: 867 ucom_dtr(sc, 0); 868 break; 869 870 case TIOCGFLAGS: 871 *(int *)data = sc->sc_swflags; 872 break; 873 874 case TIOCSFLAGS: 875 error = kauth_authorize_device_tty(l->l_cred, 876 KAUTH_DEVICE_TTY_PRIVSET, tp); 877 if (error) 878 break; 879 sc->sc_swflags = *(int *)data; 880 break; 881 882 case TIOCMSET: 883 case TIOCMBIS: 884 case TIOCMBIC: 885 tiocm_to_ucom(sc, cmd, *(int *)data); 886 break; 887 888 case TIOCMGET: 889 *(int *)data = ucom_to_tiocm(sc); 890 break; 891 892 case PPS_IOC_CREATE: 893 case PPS_IOC_DESTROY: 894 case PPS_IOC_GETPARAMS: 895 case PPS_IOC_SETPARAMS: 896 case PPS_IOC_GETCAP: 897 case PPS_IOC_FETCH: 898 #ifdef PPS_SYNC 899 case PPS_IOC_KCBIND: 900 #endif 901 mutex_spin_enter(&timecounter_lock); 902 error = pps_ioctl(cmd, data, &sc->sc_pps_state); 903 mutex_spin_exit(&timecounter_lock); 904 break; 905 906 default: 907 error = EPASSTHROUGH; 908 break; 909 } 910 911 //mutex_exit(&tty_lock); 912 913 return error; 914 } 915 916 static void 917 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 918 { 919 u_char combits; 920 921 combits = 0; 922 if (ISSET(ttybits, TIOCM_DTR)) 923 SET(combits, UMCR_DTR); 924 if (ISSET(ttybits, TIOCM_RTS)) 925 SET(combits, UMCR_RTS); 926 927 switch (how) { 928 case TIOCMBIC: 929 CLR(sc->sc_mcr, combits); 930 break; 931 932 case TIOCMBIS: 933 SET(sc->sc_mcr, combits); 934 break; 935 936 case TIOCMSET: 937 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 938 SET(sc->sc_mcr, combits); 939 break; 940 } 941 942 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 943 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 944 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 945 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 946 } 947 948 static int 949 ucom_to_tiocm(struct ucom_softc *sc) 950 { 951 u_char combits; 952 int ttybits = 0; 953 954 combits = sc->sc_mcr; 955 if (ISSET(combits, UMCR_DTR)) 956 SET(ttybits, TIOCM_DTR); 957 if (ISSET(combits, UMCR_RTS)) 958 SET(ttybits, TIOCM_RTS); 959 960 combits = sc->sc_msr; 961 if (ISSET(combits, UMSR_DCD)) 962 SET(ttybits, TIOCM_CD); 963 if (ISSET(combits, UMSR_CTS)) 964 SET(ttybits, TIOCM_CTS); 965 if (ISSET(combits, UMSR_DSR)) 966 SET(ttybits, TIOCM_DSR); 967 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 968 SET(ttybits, TIOCM_RI); 969 970 #if 0 971 XXX; 972 if (sc->sc_ier != 0) 973 SET(ttybits, TIOCM_LE); 974 #endif 975 976 return ttybits; 977 } 978 979 static void 980 ucom_break(struct ucom_softc *sc, int onoff) 981 { 982 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 983 984 DPRINTF("onoff=%d", onoff, 0, 0, 0); 985 986 if (sc->sc_methods->ucom_set != NULL) 987 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 988 UCOM_SET_BREAK, onoff); 989 } 990 991 static void 992 ucom_dtr(struct ucom_softc *sc, int onoff) 993 { 994 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 995 996 DPRINTF("onoff=%d", onoff, 0, 0, 0); 997 998 if (sc->sc_methods->ucom_set != NULL) 999 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1000 UCOM_SET_DTR, onoff); 1001 } 1002 1003 static void 1004 ucom_rts(struct ucom_softc *sc, int onoff) 1005 { 1006 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1007 1008 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1009 1010 if (sc->sc_methods->ucom_set != NULL) 1011 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1012 UCOM_SET_RTS, onoff); 1013 } 1014 1015 void 1016 ucom_status_change(struct ucom_softc *sc) 1017 { 1018 struct tty *tp = sc->sc_tty; 1019 u_char old_msr; 1020 1021 if (sc->sc_methods->ucom_get_status != NULL) { 1022 old_msr = sc->sc_msr; 1023 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 1024 &sc->sc_lsr, &sc->sc_msr); 1025 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) { 1026 mutex_spin_enter(&timecounter_lock); 1027 pps_capture(&sc->sc_pps_state); 1028 pps_event(&sc->sc_pps_state, 1029 (sc->sc_msr & UMSR_DCD) ? 1030 PPS_CAPTUREASSERT : 1031 PPS_CAPTURECLEAR); 1032 mutex_spin_exit(&timecounter_lock); 1033 1034 (*tp->t_linesw->l_modem)(tp, 1035 ISSET(sc->sc_msr, UMSR_DCD)); 1036 } 1037 } else { 1038 sc->sc_lsr = 0; 1039 /* Assume DCD is present, if we have no chance to check it. */ 1040 sc->sc_msr = UMSR_DCD; 1041 } 1042 } 1043 1044 static int 1045 ucomparam(struct tty *tp, struct termios *t) 1046 { 1047 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1048 UCOMUNIT(tp->t_dev)); 1049 int error; 1050 1051 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1052 1053 if (sc == NULL || sc->sc_dying) 1054 return EIO; 1055 1056 /* Check requested parameters. */ 1057 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1058 return EINVAL; 1059 1060 /* 1061 * For the console, always force CLOCAL and !HUPCL, so that the port 1062 * is always active. 1063 */ 1064 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1065 SET(t->c_cflag, CLOCAL); 1066 CLR(t->c_cflag, HUPCL); 1067 } 1068 1069 /* 1070 * If there were no changes, don't do anything. This avoids dropping 1071 * input and improves performance when all we did was frob things like 1072 * VMIN and VTIME. 1073 */ 1074 if (tp->t_ospeed == t->c_ospeed && 1075 tp->t_cflag == t->c_cflag) 1076 return 0; 1077 1078 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 1079 1080 /* And copy to tty. */ 1081 tp->t_ispeed = 0; 1082 tp->t_ospeed = t->c_ospeed; 1083 tp->t_cflag = t->c_cflag; 1084 1085 if (sc->sc_methods->ucom_param != NULL) { 1086 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 1087 t); 1088 if (error) 1089 return error; 1090 } 1091 1092 /* XXX worry about CHWFLOW */ 1093 1094 /* 1095 * Update the tty layer's idea of the carrier bit, in case we changed 1096 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1097 * explicit request. 1098 */ 1099 DPRINTF("l_modem", 0, 0, 0, 0); 1100 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 1101 1102 #if 0 1103 XXX what if the hardware is not open 1104 if (!ISSET(t->c_cflag, CHWFLOW)) { 1105 if (sc->sc_tx_stopped) { 1106 sc->sc_tx_stopped = 0; 1107 ucomstart(tp); 1108 } 1109 } 1110 #endif 1111 1112 return 0; 1113 } 1114 1115 static int 1116 ucomhwiflow(struct tty *tp, int block) 1117 { 1118 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1119 UCOMUNIT(tp->t_dev)); 1120 int old; 1121 1122 if (sc == NULL) 1123 return 0; 1124 1125 mutex_enter(sc->sc_lock); 1126 old = sc->sc_rx_stopped; 1127 sc->sc_rx_stopped = (u_char)block; 1128 1129 if (old && !block) { 1130 sc->sc_rx_unblock = 1; 1131 softint_schedule(sc->sc_si); 1132 } 1133 mutex_exit(sc->sc_lock); 1134 1135 return 1; 1136 } 1137 1138 static void 1139 ucomstart(struct tty *tp) 1140 { 1141 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1142 UCOMUNIT(tp->t_dev)); 1143 struct ucom_buffer *ub; 1144 u_char *data; 1145 int cnt; 1146 1147 if (sc == NULL) 1148 return; 1149 1150 KASSERT(sc->sc_lock); 1151 KASSERT(mutex_owned(&tty_lock)); 1152 if (sc->sc_dying) { 1153 return; 1154 } 1155 1156 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1157 goto out; 1158 if (sc->sc_tx_stopped) 1159 goto out; 1160 1161 if (!ttypull(tp)) 1162 goto out; 1163 1164 /* Grab the first contiguous region of buffer space. */ 1165 data = tp->t_outq.c_cf; 1166 cnt = ndqb(&tp->t_outq, 0); 1167 1168 if (cnt == 0) 1169 goto out; 1170 1171 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1172 if (ub == NULL) { 1173 SET(tp->t_state, TS_BUSY); 1174 goto out; 1175 } 1176 1177 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1178 1179 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1180 SET(tp->t_state, TS_BUSY); 1181 1182 if (cnt > sc->sc_obufsize) 1183 cnt = sc->sc_obufsize; 1184 1185 if (sc->sc_methods->ucom_write != NULL) 1186 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1187 ub->ub_data, data, &cnt); 1188 else 1189 memcpy(ub->ub_data, data, cnt); 1190 1191 ub->ub_len = cnt; 1192 ub->ub_index = 0; 1193 1194 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1195 1196 softint_schedule(sc->sc_si); 1197 1198 out: 1199 return; 1200 } 1201 1202 void 1203 ucomstop(struct tty *tp, int flag) 1204 { 1205 #if 0 1206 struct ucom_softc *sc = 1207 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev)); 1208 1209 mutex_enter(sc->sc_lock); 1210 mutex_spin_enter(&tty_lock); 1211 if (ISSET(tp->t_state, TS_BUSY)) { 1212 /* obuff_full -> obuff_free? */ 1213 /* sc->sc_tx_stopped = 1; */ 1214 if (!ISSET(tp->t_state, TS_TTSTOP)) 1215 SET(tp->t_state, TS_FLUSH); 1216 } 1217 mutex_spin_exit(&tty_lock); 1218 mutex_exit(sc->sc_lock); 1219 #endif 1220 } 1221 1222 static void 1223 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1224 usbd_status err) 1225 { 1226 struct tty *tp = sc->sc_tty; 1227 uint32_t cc = ub->ub_len; 1228 1229 KASSERT(mutex_owned(sc->sc_lock)); 1230 1231 switch (err) { 1232 case USBD_IN_PROGRESS: 1233 ub->ub_index = ub->ub_len; 1234 break; 1235 case USBD_STALLED: 1236 ub->ub_index = 0; 1237 softint_schedule(sc->sc_si); 1238 break; 1239 case USBD_NORMAL_COMPLETION: 1240 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1241 rnd_add_uint32(&sc->sc_rndsource, cc); 1242 /*FALLTHROUGH*/ 1243 default: 1244 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1245 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1246 cc -= sc->sc_opkthdrlen; 1247 1248 mutex_spin_enter(&tty_lock); 1249 CLR(tp->t_state, TS_BUSY); 1250 if (ISSET(tp->t_state, TS_FLUSH)) 1251 CLR(tp->t_state, TS_FLUSH); 1252 else 1253 ndflush(&tp->t_outq, cc); 1254 mutex_spin_exit(&tty_lock); 1255 1256 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1257 !sc->sc_dying) { 1258 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1259 ucom_submit_write(sc, ub); 1260 1261 mutex_spin_enter(&tty_lock); 1262 (*tp->t_linesw->l_start)(tp); 1263 mutex_spin_exit(&tty_lock); 1264 } 1265 break; 1266 } 1267 } 1268 1269 static void 1270 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1271 { 1272 1273 KASSERT(mutex_owned(sc->sc_lock)); 1274 1275 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, ub->ub_len, 1276 0, USBD_NO_TIMEOUT, ucomwritecb); 1277 1278 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1279 } 1280 1281 static void 1282 ucomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status) 1283 { 1284 struct ucom_softc *sc = (struct ucom_softc *)p; 1285 1286 mutex_enter(sc->sc_lock); 1287 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1288 mutex_exit(sc->sc_lock); 1289 1290 } 1291 1292 static void 1293 ucom_softintr(void *arg) 1294 { 1295 struct ucom_softc *sc = arg; 1296 struct tty *tp = sc->sc_tty; 1297 struct ucom_buffer *ub; 1298 1299 mutex_enter(sc->sc_lock); 1300 mutex_enter(&tty_lock); 1301 if (!ISSET(tp->t_state, TS_ISOPEN)) { 1302 mutex_exit(&tty_lock); 1303 mutex_exit(sc->sc_lock); 1304 return; 1305 } 1306 mutex_exit(&tty_lock); 1307 1308 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1309 1310 if (ub != NULL && ub->ub_index == 0) 1311 ucom_submit_write(sc, ub); 1312 1313 if (sc->sc_rx_unblock) 1314 ucom_read_complete(sc); 1315 1316 mutex_exit(sc->sc_lock); 1317 } 1318 1319 static void 1320 ucom_read_complete(struct ucom_softc *sc) 1321 { 1322 int (*rint)(int, struct tty *); 1323 struct ucom_buffer *ub; 1324 struct tty *tp; 1325 1326 KASSERT(mutex_owned(sc->sc_lock)); 1327 1328 tp = sc->sc_tty; 1329 rint = tp->t_linesw->l_rint; 1330 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1331 1332 while (ub != NULL && !sc->sc_rx_stopped) { 1333 1334 /* XXX ttyinput takes tty_lock */ 1335 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1336 /* Give characters to tty layer. */ 1337 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1338 /* Overflow: drop remainder */ 1339 ub->ub_index = ub->ub_len; 1340 } else 1341 ub->ub_index++; 1342 } 1343 1344 if (ub->ub_index == ub->ub_len) { 1345 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1346 1347 ucomsubmitread(sc, ub); 1348 1349 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1350 } 1351 } 1352 1353 sc->sc_rx_unblock = (ub != NULL); 1354 } 1355 1356 static usbd_status 1357 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1358 { 1359 usbd_status err; 1360 1361 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, sc->sc_ibufsize, 1362 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ucomreadcb); 1363 1364 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1365 /* XXX: Recover from this, please! */ 1366 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1367 return err; 1368 } 1369 1370 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1371 1372 return USBD_NORMAL_COMPLETION; 1373 } 1374 1375 static void 1376 ucomreadcb(struct usbd_xfer *xfer, void *p, usbd_status status) 1377 { 1378 struct ucom_softc *sc = (struct ucom_softc *)p; 1379 struct tty *tp = sc->sc_tty; 1380 struct ucom_buffer *ub; 1381 uint32_t cc; 1382 u_char *cp; 1383 1384 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1385 1386 mutex_enter(sc->sc_lock); 1387 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1388 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1389 1390 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1391 sc->sc_dying) { 1392 DPRINTF("dying", 0, 0, 0, 0); 1393 ub->ub_index = ub->ub_len = 0; 1394 /* Send something to wake upper layer */ 1395 if (status != USBD_CANCELLED) { 1396 (tp->t_linesw->l_rint)('\n', tp); 1397 mutex_spin_enter(&tty_lock); /* XXX */ 1398 ttwakeup(tp); 1399 mutex_spin_exit(&tty_lock); /* XXX */ 1400 } 1401 mutex_exit(sc->sc_lock); 1402 return; 1403 } 1404 1405 if (status == USBD_STALLED) { 1406 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1407 ucomsubmitread(sc, ub); 1408 mutex_exit(sc->sc_lock); 1409 return; 1410 } 1411 1412 if (status != USBD_NORMAL_COMPLETION) { 1413 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1414 mutex_exit(sc->sc_lock); 1415 return; 1416 } 1417 1418 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1419 1420 #ifdef UCOM_DEBUG 1421 /* This is triggered by uslsa(4) occasionally. */ 1422 if ((ucomdebug > 0) && (cc == 0)) { 1423 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1424 } 1425 #endif 1426 1427 KDASSERT(cp == ub->ub_data); 1428 1429 rnd_add_uint32(&sc->sc_rndsource, cc); 1430 1431 if (sc->sc_opening) { 1432 ucomsubmitread(sc, ub); 1433 mutex_exit(sc->sc_lock); 1434 return; 1435 } 1436 1437 if (sc->sc_methods->ucom_read != NULL) { 1438 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1439 &cp, &cc); 1440 ub->ub_index = (u_int)(cp - ub->ub_data); 1441 } else 1442 ub->ub_index = 0; 1443 1444 ub->ub_len = cc; 1445 1446 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1447 1448 ucom_read_complete(sc); 1449 mutex_exit(sc->sc_lock); 1450 } 1451 1452 static void 1453 ucom_cleanup(struct ucom_softc *sc) 1454 { 1455 1456 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1457 1458 DPRINTF("aborting pipes", 0, 0, 0, 0); 1459 1460 KASSERT(mutex_owned(sc->sc_lock)); 1461 1462 ucom_shutdown(sc); 1463 if (sc->sc_bulkin_pipe != NULL) { 1464 struct usbd_pipe *bulkin_pipe = sc->sc_bulkin_pipe; 1465 sc->sc_bulkin_pipe = NULL; 1466 mutex_exit(sc->sc_lock); 1467 usbd_abort_pipe(bulkin_pipe); 1468 mutex_enter(sc->sc_lock); 1469 } 1470 if (sc->sc_bulkout_pipe != NULL) { 1471 struct usbd_pipe *bulkout_pipe = sc->sc_bulkout_pipe; 1472 sc->sc_bulkout_pipe = NULL; 1473 mutex_exit(sc->sc_lock); 1474 usbd_abort_pipe(bulkout_pipe); 1475 mutex_enter(sc->sc_lock); 1476 } 1477 } 1478 1479 #endif /* NUCOM > 0 */ 1480 1481 int 1482 ucomprint(void *aux, const char *pnp) 1483 { 1484 struct ucom_attach_args *uca = aux; 1485 1486 if (pnp) 1487 aprint_normal("ucom at %s", pnp); 1488 if (uca->portno != UCOM_UNK_PORTNO) 1489 aprint_normal(" portno %d", uca->portno); 1490 return UNCONF; 1491 } 1492 1493 int 1494 ucomsubmatch(device_t parent, cfdata_t cf, 1495 const int *ldesc, void *aux) 1496 { 1497 struct ucom_attach_args *uca = aux; 1498 1499 if (uca->portno != UCOM_UNK_PORTNO && 1500 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1501 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1502 return 0; 1503 return config_match(parent, cf, aux); 1504 } 1505
Indexes created Mon Oct 20 20:10:13 GMT 2025