ucom.c revision 1.108.2.11
1 /* $NetBSD: ucom.c,v 1.108.2.11 2015/12/28 09:26:33 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 1.108.2.11 2015/12/28 09:26:33 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 prop_dictionary_set_int32(device_properties(self), "port", uca->portno); 264 265 sc->sc_dev = self; 266 sc->sc_udev = uca->device; 267 sc->sc_iface = uca->iface; 268 sc->sc_bulkout_no = uca->bulkout; 269 sc->sc_bulkin_no = uca->bulkin; 270 sc->sc_ibufsize = uca->ibufsize; 271 sc->sc_ibufsizepad = uca->ibufsizepad; 272 sc->sc_obufsize = uca->obufsize; 273 sc->sc_opkthdrlen = uca->opkthdrlen; 274 sc->sc_methods = uca->methods; 275 sc->sc_parent = uca->arg; 276 sc->sc_portno = uca->portno; 277 278 sc->sc_lsr = 0; 279 sc->sc_msr = 0; 280 sc->sc_mcr = 0; 281 sc->sc_tx_stopped = 0; 282 sc->sc_swflags = 0; 283 sc->sc_opening = 0; 284 sc->sc_refcnt = 0; 285 sc->sc_dying = 0; 286 287 sc->sc_si = softint_establish(SOFTINT_USB, ucom_softintr, sc); 288 sc->sc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTUSB); 289 cv_init(&sc->sc_opencv, "ucomopen"); 290 cv_init(&sc->sc_detachcv, "ucomdtch"); 291 292 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 293 SIMPLEQ_INIT(&sc->sc_ibuff_full); 294 SIMPLEQ_INIT(&sc->sc_obuff_free); 295 SIMPLEQ_INIT(&sc->sc_obuff_full); 296 297 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 298 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 299 300 DPRINTF("open pipes in=%d out=%d", sc->sc_bulkin_no, sc->sc_bulkout_no, 301 0, 0); 302 303 struct ucom_buffer *ub; 304 usbd_status err; 305 int error; 306 307 /* Open the bulk pipes */ 308 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 309 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 310 if (err) { 311 DPRINTF("open bulk in error (addr %d), err=%d", 312 sc->sc_bulkin_no, err, 0, 0); 313 error = EIO; 314 goto fail_0; 315 } 316 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 317 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 318 if (err) { 319 DPRINTF("open bulk out error (addr %d), err=%d", 320 sc->sc_bulkout_no, err, 0, 0); 321 error = EIO; 322 goto fail_1; 323 } 324 325 /* Allocate input buffers */ 326 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 327 ub++) { 328 error = usbd_create_xfer(sc->sc_bulkin_pipe, sc->sc_ibufsizepad, 329 USBD_SHORT_XFER_OK, 0, &ub->ub_xfer); 330 if (error) 331 goto fail_2; 332 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 333 } 334 335 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 336 ub++) { 337 error = usbd_create_xfer(sc->sc_bulkout_pipe, sc->sc_obufsize, 338 0, 0, &ub->ub_xfer); 339 if (error) 340 goto fail_2; 341 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 342 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 343 } 344 345 tp = tty_alloc(); 346 tp->t_oproc = ucomstart; 347 tp->t_param = ucomparam; 348 tp->t_hwiflow = ucomhwiflow; 349 sc->sc_tty = tp; 350 351 DPRINTF("tty_attach %p", tp, 0, 0, 0); 352 tty_attach(tp); 353 354 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 355 RND_TYPE_TTY, RND_FLAG_DEFAULT); 356 357 if (!pmf_device_register(self, NULL, NULL)) 358 aprint_error_dev(self, "couldn't establish power handler\n"); 359 return; 360 361 fail_2: 362 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 363 ub++) { 364 if (ub->ub_xfer) 365 usbd_destroy_xfer(ub->ub_xfer); 366 } 367 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 368 ub++) { 369 if (ub->ub_xfer) 370 usbd_destroy_xfer(ub->ub_xfer); 371 } 372 373 fail_1: 374 usbd_close_pipe(sc->sc_bulkin_pipe); 375 376 fail_0: 377 aprint_error_dev(self, "attach failed, error=%d\n", error); 378 379 return; 380 } 381 382 int 383 ucom_detach(device_t self, int flags) 384 { 385 struct ucom_softc *sc = device_private(self); 386 struct tty *tp = sc->sc_tty; 387 int maj, mn; 388 int i; 389 390 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 391 392 DPRINTF("sc=%p flags=%d tp=%p", sc, flags, tp, 0); 393 DPRINTF("... pipe=%d,%d",sc->sc_bulkin_no, sc->sc_bulkout_no, 0, 0); 394 395 mutex_enter(sc->sc_lock); 396 sc->sc_dying = 1; 397 mutex_exit(sc->sc_lock); 398 399 pmf_device_deregister(self); 400 401 if (sc->sc_bulkin_pipe != NULL) 402 usbd_abort_pipe(sc->sc_bulkin_pipe); 403 if (sc->sc_bulkout_pipe != NULL) 404 usbd_abort_pipe(sc->sc_bulkout_pipe); 405 406 mutex_enter(sc->sc_lock); 407 while (sc->sc_refcnt > 0) { 408 /* Wake up anyone waiting */ 409 if (tp != NULL) { 410 mutex_spin_enter(&tty_lock); 411 CLR(tp->t_state, TS_CARR_ON); 412 CLR(tp->t_cflag, CLOCAL | MDMBUF); 413 ttyflush(tp, FREAD|FWRITE); 414 mutex_spin_exit(&tty_lock); 415 } 416 /* Wait for processes to go away. */ 417 usb_detach_wait(sc->sc_dev, &sc->sc_detachcv, sc->sc_lock); 418 } 419 420 softint_disestablish(sc->sc_si); 421 mutex_exit(sc->sc_lock); 422 423 /* locate the major number */ 424 maj = cdevsw_lookup_major(&ucom_cdevsw); 425 426 /* Nuke the vnodes for any open instances. */ 427 mn = device_unit(self); 428 DPRINTF("maj=%d mn=%d\n", maj, mn, 0, 0); 429 vdevgone(maj, mn, mn, VCHR); 430 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 431 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 432 433 /* Detach and free the tty. */ 434 if (tp != NULL) { 435 tty_detach(tp); 436 tty_free(tp); 437 sc->sc_tty = NULL; 438 } 439 440 for (i = 0; i < UCOM_IN_BUFFS; i++) { 441 if (sc->sc_ibuff[i].ub_xfer != NULL) 442 usbd_destroy_xfer(sc->sc_ibuff[i].ub_xfer); 443 } 444 445 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 446 if (sc->sc_obuff[i].ub_xfer != NULL) 447 usbd_destroy_xfer(sc->sc_obuff[i].ub_xfer); 448 } 449 450 if (sc->sc_bulkin_pipe != NULL) { 451 usbd_close_pipe(sc->sc_bulkin_pipe); 452 sc->sc_bulkin_pipe = NULL; 453 } 454 455 if (sc->sc_bulkout_pipe != NULL) { 456 usbd_close_pipe(sc->sc_bulkout_pipe); 457 sc->sc_bulkout_pipe = NULL; 458 } 459 460 /* Detach the random source */ 461 rnd_detach_source(&sc->sc_rndsource); 462 463 mutex_destroy(sc->sc_lock); 464 cv_destroy(&sc->sc_opencv); 465 cv_destroy(&sc->sc_detachcv); 466 467 return 0; 468 } 469 470 int 471 ucom_activate(device_t self, enum devact act) 472 { 473 struct ucom_softc *sc = device_private(self); 474 475 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 476 477 DPRINTFN(5, "%d", act, 0, 0, 0); 478 479 switch (act) { 480 case DVACT_DEACTIVATE: 481 mutex_enter(sc->sc_lock); 482 sc->sc_dying = 1; 483 mutex_exit(sc->sc_lock); 484 return 0; 485 default: 486 return EOPNOTSUPP; 487 } 488 } 489 490 void 491 ucom_shutdown(struct ucom_softc *sc) 492 { 493 struct tty *tp = sc->sc_tty; 494 495 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 496 497 KASSERT(mutex_owned(sc->sc_lock)); 498 /* 499 * Hang up if necessary. Wait a bit, so the other side has time to 500 * notice even if we immediately open the port again. 501 */ 502 if (ISSET(tp->t_cflag, HUPCL)) { 503 ucom_dtr(sc, 0); 504 /* XXX will only timeout */ 505 (void) kpause(ttclos, false, hz, sc->sc_lock); 506 } 507 } 508 509 int 510 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 511 { 512 int unit = UCOMUNIT(dev); 513 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 514 struct ucom_buffer *ub; 515 struct tty *tp; 516 int error; 517 518 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 519 520 if (sc == NULL) 521 return ENXIO; 522 523 mutex_enter(sc->sc_lock); 524 if (sc->sc_dying) { 525 mutex_exit(sc->sc_lock); 526 return EIO; 527 } 528 529 if (!device_is_active(sc->sc_dev)) { 530 mutex_exit(sc->sc_lock); 531 return ENXIO; 532 } 533 534 tp = sc->sc_tty; 535 536 DPRINTF("unit=%d, tp=%p\n", unit, tp, 0, 0); 537 538 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) { 539 mutex_exit(sc->sc_lock); 540 return EBUSY; 541 } 542 543 /* 544 * Do the following iff this is a first open. 545 */ 546 while (sc->sc_opening) { 547 error = cv_wait_sig(&sc->sc_opencv, sc->sc_lock); 548 549 if (error) { 550 mutex_exit(sc->sc_lock); 551 return error; 552 } 553 } 554 555 sc->sc_opening = 1; 556 557 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 558 struct termios t; 559 560 tp->t_dev = dev; 561 562 if (sc->sc_methods->ucom_open != NULL) { 563 error = sc->sc_methods->ucom_open(sc->sc_parent, 564 sc->sc_portno); 565 if (error) { 566 ucom_cleanup(sc); 567 sc->sc_opening = 0; 568 cv_signal(&sc->sc_opencv); 569 mutex_exit(sc->sc_lock); 570 return error; 571 } 572 } 573 574 ucom_status_change(sc); 575 576 /* Clear PPS capture state on first open. */ 577 mutex_spin_enter(&timecounter_lock); 578 memset(&sc->sc_pps_state, 0, sizeof(sc->sc_pps_state)); 579 sc->sc_pps_state.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 580 pps_init(&sc->sc_pps_state); 581 mutex_spin_exit(&timecounter_lock); 582 583 /* 584 * Initialize the termios status to the defaults. Add in the 585 * sticky bits from TIOCSFLAGS. 586 */ 587 t.c_ispeed = 0; 588 t.c_ospeed = TTYDEF_SPEED; 589 t.c_cflag = TTYDEF_CFLAG; 590 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 591 SET(t.c_cflag, CLOCAL); 592 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 593 SET(t.c_cflag, CRTSCTS); 594 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 595 SET(t.c_cflag, MDMBUF); 596 /* Make sure ucomparam() will do something. */ 597 tp->t_ospeed = 0; 598 (void) ucomparam(tp, &t); 599 tp->t_iflag = TTYDEF_IFLAG; 600 tp->t_oflag = TTYDEF_OFLAG; 601 tp->t_lflag = TTYDEF_LFLAG; 602 ttychars(tp); 603 ttsetwater(tp); 604 605 /* 606 * Turn on DTR. We must always do this, even if carrier is not 607 * present, because otherwise we'd have to use TIOCSDTR 608 * immediately after setting CLOCAL, which applications do not 609 * expect. We always assert DTR while the device is open 610 * unless explicitly requested to deassert it. Ditto RTS. 611 */ 612 ucom_dtr(sc, 1); 613 ucom_rts(sc, 1); 614 615 sc->sc_rx_unblock = 0; 616 sc->sc_rx_stopped = 0; 617 sc->sc_tx_stopped = 0; 618 619 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 620 ub++) { 621 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 622 error = EIO; 623 goto fail_2; 624 } 625 } 626 } 627 sc->sc_opening = 0; 628 cv_signal(&sc->sc_opencv); 629 mutex_exit(sc->sc_lock); 630 631 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 632 if (error) 633 goto bad; 634 635 error = (*tp->t_linesw->l_open)(dev, tp); 636 if (error) 637 goto bad; 638 639 return 0; 640 641 fail_2: 642 usbd_abort_pipe(sc->sc_bulkin_pipe); 643 usbd_abort_pipe(sc->sc_bulkout_pipe); 644 645 mutex_enter(sc->sc_lock); 646 sc->sc_opening = 0; 647 cv_signal(&sc->sc_opencv); 648 mutex_exit(sc->sc_lock); 649 650 return error; 651 652 bad: 653 mutex_spin_enter(&tty_lock); 654 CLR(tp->t_state, TS_BUSY); 655 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 656 /* 657 * We failed to open the device, and nobody else had it opened. 658 * Clean up the state as appropriate. 659 */ 660 ucom_cleanup(sc); 661 } 662 mutex_spin_exit(&tty_lock); 663 664 return error; 665 } 666 667 int 668 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 669 { 670 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 671 struct tty *tp; 672 673 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 674 675 DPRINTF("unit=%d", UCOMUNIT(dev), 0, 0, 0); 676 677 if (sc == NULL) 678 return 0; 679 680 mutex_enter(sc->sc_lock); 681 tp = sc->sc_tty; 682 683 if (!ISSET(tp->t_state, TS_ISOPEN)) { 684 goto out; 685 } 686 687 sc->sc_refcnt++; 688 689 (*tp->t_linesw->l_close)(tp, flag); 690 ttyclose(tp); 691 692 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 693 /* 694 * Although we got a last close, the device may still be in 695 * use; e.g. if this was the dialout node, and there are still 696 * processes waiting for carrier on the non-dialout node. 697 */ 698 ucom_cleanup(sc); 699 } 700 701 if (sc->sc_methods->ucom_close != NULL) 702 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 703 704 if (--sc->sc_refcnt < 0) 705 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 706 707 out: 708 mutex_exit(sc->sc_lock); 709 710 return 0; 711 } 712 713 int 714 ucomread(dev_t dev, struct uio *uio, int flag) 715 { 716 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 717 struct tty *tp; 718 int error; 719 720 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 721 722 if (sc == NULL) 723 return EIO; 724 725 mutex_enter(sc->sc_lock); 726 if (sc->sc_dying) { 727 mutex_exit(sc->sc_lock); 728 return EIO; 729 } 730 731 tp = sc->sc_tty; 732 733 sc->sc_refcnt++; 734 mutex_exit(sc->sc_lock); 735 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 736 mutex_enter(sc->sc_lock); 737 738 if (--sc->sc_refcnt < 0) 739 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 740 mutex_exit(sc->sc_lock); 741 742 return error; 743 } 744 745 int 746 ucomwrite(dev_t dev, struct uio *uio, int flag) 747 { 748 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 749 struct tty *tp; 750 int error; 751 752 if (sc == NULL) 753 return EIO; 754 755 mutex_enter(sc->sc_lock); 756 if (sc->sc_dying) { 757 mutex_exit(sc->sc_lock); 758 return EIO; 759 } 760 761 tp = sc->sc_tty; 762 763 sc->sc_refcnt++; 764 mutex_exit(sc->sc_lock); 765 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 766 mutex_enter(sc->sc_lock); 767 if (--sc->sc_refcnt < 0) 768 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 769 mutex_exit(sc->sc_lock); 770 771 return error; 772 } 773 774 int 775 ucompoll(dev_t dev, int events, struct lwp *l) 776 { 777 struct ucom_softc *sc; 778 struct tty *tp; 779 int revents; 780 781 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 782 if (sc == NULL) 783 return POLLHUP; 784 785 mutex_enter(sc->sc_lock); 786 if (sc->sc_dying) { 787 mutex_exit(sc->sc_lock); 788 return POLLHUP; 789 } 790 tp = sc->sc_tty; 791 792 sc->sc_refcnt++; 793 mutex_exit(sc->sc_lock); 794 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 795 mutex_enter(sc->sc_lock); 796 if (--sc->sc_refcnt < 0) 797 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 798 mutex_exit(sc->sc_lock); 799 800 return revents; 801 } 802 803 struct tty * 804 ucomtty(dev_t dev) 805 { 806 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 807 808 return sc != NULL ? sc->sc_tty : NULL; 809 } 810 811 int 812 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 813 { 814 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 815 int error; 816 817 if (sc == NULL) 818 return EIO; 819 820 mutex_enter(sc->sc_lock); 821 if (sc->sc_dying) { 822 mutex_exit(sc->sc_lock); 823 return EIO; 824 } 825 826 sc->sc_refcnt++; 827 error = ucom_do_ioctl(sc, cmd, data, flag, l); 828 if (--sc->sc_refcnt < 0) 829 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 830 mutex_exit(sc->sc_lock); 831 return error; 832 } 833 834 static int 835 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 836 int flag, struct lwp *l) 837 { 838 struct tty *tp = sc->sc_tty; 839 int error; 840 841 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 842 843 DPRINTF("cmd=0x%08lx", cmd, 0, 0, 0); 844 845 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 846 if (error != EPASSTHROUGH) 847 return error; 848 849 error = ttioctl(tp, cmd, data, flag, l); 850 if (error != EPASSTHROUGH) 851 return error; 852 853 if (sc->sc_methods->ucom_ioctl != NULL) { 854 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 855 sc->sc_portno, cmd, data, flag, l->l_proc); 856 if (error != EPASSTHROUGH) 857 return error; 858 } 859 860 error = 0; 861 862 DPRINTF("our cmd=0x%08lx", cmd, 0, 0, 0); 863 //mutex_enter(&tty_lock); 864 865 switch (cmd) { 866 case TIOCSBRK: 867 ucom_break(sc, 1); 868 break; 869 870 case TIOCCBRK: 871 ucom_break(sc, 0); 872 break; 873 874 case TIOCSDTR: 875 ucom_dtr(sc, 1); 876 break; 877 878 case TIOCCDTR: 879 ucom_dtr(sc, 0); 880 break; 881 882 case TIOCGFLAGS: 883 *(int *)data = sc->sc_swflags; 884 break; 885 886 case TIOCSFLAGS: 887 error = kauth_authorize_device_tty(l->l_cred, 888 KAUTH_DEVICE_TTY_PRIVSET, tp); 889 if (error) 890 break; 891 sc->sc_swflags = *(int *)data; 892 break; 893 894 case TIOCMSET: 895 case TIOCMBIS: 896 case TIOCMBIC: 897 tiocm_to_ucom(sc, cmd, *(int *)data); 898 break; 899 900 case TIOCMGET: 901 *(int *)data = ucom_to_tiocm(sc); 902 break; 903 904 case PPS_IOC_CREATE: 905 case PPS_IOC_DESTROY: 906 case PPS_IOC_GETPARAMS: 907 case PPS_IOC_SETPARAMS: 908 case PPS_IOC_GETCAP: 909 case PPS_IOC_FETCH: 910 #ifdef PPS_SYNC 911 case PPS_IOC_KCBIND: 912 #endif 913 mutex_spin_enter(&timecounter_lock); 914 error = pps_ioctl(cmd, data, &sc->sc_pps_state); 915 mutex_spin_exit(&timecounter_lock); 916 break; 917 918 default: 919 error = EPASSTHROUGH; 920 break; 921 } 922 923 //mutex_exit(&tty_lock); 924 925 return error; 926 } 927 928 static void 929 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 930 { 931 u_char combits; 932 933 combits = 0; 934 if (ISSET(ttybits, TIOCM_DTR)) 935 SET(combits, UMCR_DTR); 936 if (ISSET(ttybits, TIOCM_RTS)) 937 SET(combits, UMCR_RTS); 938 939 switch (how) { 940 case TIOCMBIC: 941 CLR(sc->sc_mcr, combits); 942 break; 943 944 case TIOCMBIS: 945 SET(sc->sc_mcr, combits); 946 break; 947 948 case TIOCMSET: 949 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 950 SET(sc->sc_mcr, combits); 951 break; 952 } 953 954 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 955 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 956 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 957 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 958 } 959 960 static int 961 ucom_to_tiocm(struct ucom_softc *sc) 962 { 963 u_char combits; 964 int ttybits = 0; 965 966 combits = sc->sc_mcr; 967 if (ISSET(combits, UMCR_DTR)) 968 SET(ttybits, TIOCM_DTR); 969 if (ISSET(combits, UMCR_RTS)) 970 SET(ttybits, TIOCM_RTS); 971 972 combits = sc->sc_msr; 973 if (ISSET(combits, UMSR_DCD)) 974 SET(ttybits, TIOCM_CD); 975 if (ISSET(combits, UMSR_CTS)) 976 SET(ttybits, TIOCM_CTS); 977 if (ISSET(combits, UMSR_DSR)) 978 SET(ttybits, TIOCM_DSR); 979 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 980 SET(ttybits, TIOCM_RI); 981 982 #if 0 983 XXX; 984 if (sc->sc_ier != 0) 985 SET(ttybits, TIOCM_LE); 986 #endif 987 988 return ttybits; 989 } 990 991 static void 992 ucom_break(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_BREAK, onoff); 1001 } 1002 1003 static void 1004 ucom_dtr(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_DTR, onoff); 1013 } 1014 1015 static void 1016 ucom_rts(struct ucom_softc *sc, int onoff) 1017 { 1018 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1019 1020 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1021 1022 if (sc->sc_methods->ucom_set != NULL) 1023 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1024 UCOM_SET_RTS, onoff); 1025 } 1026 1027 void 1028 ucom_status_change(struct ucom_softc *sc) 1029 { 1030 struct tty *tp = sc->sc_tty; 1031 u_char old_msr; 1032 1033 if (sc->sc_methods->ucom_get_status != NULL) { 1034 old_msr = sc->sc_msr; 1035 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 1036 &sc->sc_lsr, &sc->sc_msr); 1037 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) { 1038 mutex_spin_enter(&timecounter_lock); 1039 pps_capture(&sc->sc_pps_state); 1040 pps_event(&sc->sc_pps_state, 1041 (sc->sc_msr & UMSR_DCD) ? 1042 PPS_CAPTUREASSERT : 1043 PPS_CAPTURECLEAR); 1044 mutex_spin_exit(&timecounter_lock); 1045 1046 (*tp->t_linesw->l_modem)(tp, 1047 ISSET(sc->sc_msr, UMSR_DCD)); 1048 } 1049 } else { 1050 sc->sc_lsr = 0; 1051 /* Assume DCD is present, if we have no chance to check it. */ 1052 sc->sc_msr = UMSR_DCD; 1053 } 1054 } 1055 1056 static int 1057 ucomparam(struct tty *tp, struct termios *t) 1058 { 1059 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1060 UCOMUNIT(tp->t_dev)); 1061 int error; 1062 1063 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1064 1065 if (sc == NULL || sc->sc_dying) 1066 return EIO; 1067 1068 /* Check requested parameters. */ 1069 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1070 return EINVAL; 1071 1072 /* 1073 * For the console, always force CLOCAL and !HUPCL, so that the port 1074 * is always active. 1075 */ 1076 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1077 SET(t->c_cflag, CLOCAL); 1078 CLR(t->c_cflag, HUPCL); 1079 } 1080 1081 /* 1082 * If there were no changes, don't do anything. This avoids dropping 1083 * input and improves performance when all we did was frob things like 1084 * VMIN and VTIME. 1085 */ 1086 if (tp->t_ospeed == t->c_ospeed && 1087 tp->t_cflag == t->c_cflag) 1088 return 0; 1089 1090 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 1091 1092 /* And copy to tty. */ 1093 tp->t_ispeed = 0; 1094 tp->t_ospeed = t->c_ospeed; 1095 tp->t_cflag = t->c_cflag; 1096 1097 if (sc->sc_methods->ucom_param != NULL) { 1098 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 1099 t); 1100 if (error) 1101 return error; 1102 } 1103 1104 /* XXX worry about CHWFLOW */ 1105 1106 /* 1107 * Update the tty layer's idea of the carrier bit, in case we changed 1108 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1109 * explicit request. 1110 */ 1111 DPRINTF("l_modem", 0, 0, 0, 0); 1112 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 1113 1114 #if 0 1115 XXX what if the hardware is not open 1116 if (!ISSET(t->c_cflag, CHWFLOW)) { 1117 if (sc->sc_tx_stopped) { 1118 sc->sc_tx_stopped = 0; 1119 ucomstart(tp); 1120 } 1121 } 1122 #endif 1123 1124 return 0; 1125 } 1126 1127 static int 1128 ucomhwiflow(struct tty *tp, int block) 1129 { 1130 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1131 UCOMUNIT(tp->t_dev)); 1132 int old; 1133 1134 if (sc == NULL) 1135 return 0; 1136 1137 mutex_enter(sc->sc_lock); 1138 old = sc->sc_rx_stopped; 1139 sc->sc_rx_stopped = (u_char)block; 1140 1141 if (old && !block) { 1142 sc->sc_rx_unblock = 1; 1143 softint_schedule(sc->sc_si); 1144 } 1145 mutex_exit(sc->sc_lock); 1146 1147 return 1; 1148 } 1149 1150 static void 1151 ucomstart(struct tty *tp) 1152 { 1153 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1154 UCOMUNIT(tp->t_dev)); 1155 struct ucom_buffer *ub; 1156 u_char *data; 1157 int cnt; 1158 1159 if (sc == NULL) 1160 return; 1161 1162 KASSERT(sc->sc_lock); 1163 KASSERT(mutex_owned(&tty_lock)); 1164 if (sc->sc_dying) { 1165 return; 1166 } 1167 1168 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1169 goto out; 1170 if (sc->sc_tx_stopped) 1171 goto out; 1172 1173 if (!ttypull(tp)) 1174 goto out; 1175 1176 /* Grab the first contiguous region of buffer space. */ 1177 data = tp->t_outq.c_cf; 1178 cnt = ndqb(&tp->t_outq, 0); 1179 1180 if (cnt == 0) 1181 goto out; 1182 1183 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1184 if (ub == NULL) { 1185 SET(tp->t_state, TS_BUSY); 1186 goto out; 1187 } 1188 1189 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1190 1191 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1192 SET(tp->t_state, TS_BUSY); 1193 1194 if (cnt > sc->sc_obufsize) 1195 cnt = sc->sc_obufsize; 1196 1197 if (sc->sc_methods->ucom_write != NULL) 1198 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1199 ub->ub_data, data, &cnt); 1200 else 1201 memcpy(ub->ub_data, data, cnt); 1202 1203 ub->ub_len = cnt; 1204 ub->ub_index = 0; 1205 1206 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1207 1208 softint_schedule(sc->sc_si); 1209 1210 out: 1211 return; 1212 } 1213 1214 void 1215 ucomstop(struct tty *tp, int flag) 1216 { 1217 #if 0 1218 struct ucom_softc *sc = 1219 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev)); 1220 1221 mutex_enter(sc->sc_lock); 1222 mutex_spin_enter(&tty_lock); 1223 if (ISSET(tp->t_state, TS_BUSY)) { 1224 /* obuff_full -> obuff_free? */ 1225 /* sc->sc_tx_stopped = 1; */ 1226 if (!ISSET(tp->t_state, TS_TTSTOP)) 1227 SET(tp->t_state, TS_FLUSH); 1228 } 1229 mutex_spin_exit(&tty_lock); 1230 mutex_exit(sc->sc_lock); 1231 #endif 1232 } 1233 1234 static void 1235 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1236 usbd_status err) 1237 { 1238 struct tty *tp = sc->sc_tty; 1239 uint32_t cc = ub->ub_len; 1240 1241 KASSERT(mutex_owned(sc->sc_lock)); 1242 1243 switch (err) { 1244 case USBD_IN_PROGRESS: 1245 ub->ub_index = ub->ub_len; 1246 break; 1247 case USBD_STALLED: 1248 ub->ub_index = 0; 1249 softint_schedule(sc->sc_si); 1250 break; 1251 case USBD_NORMAL_COMPLETION: 1252 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1253 rnd_add_uint32(&sc->sc_rndsource, cc); 1254 /*FALLTHROUGH*/ 1255 default: 1256 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1257 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1258 cc -= sc->sc_opkthdrlen; 1259 1260 mutex_spin_enter(&tty_lock); 1261 CLR(tp->t_state, TS_BUSY); 1262 if (ISSET(tp->t_state, TS_FLUSH)) 1263 CLR(tp->t_state, TS_FLUSH); 1264 else 1265 ndflush(&tp->t_outq, cc); 1266 mutex_spin_exit(&tty_lock); 1267 1268 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1269 !sc->sc_dying) { 1270 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1271 ucom_submit_write(sc, ub); 1272 1273 mutex_spin_enter(&tty_lock); 1274 (*tp->t_linesw->l_start)(tp); 1275 mutex_spin_exit(&tty_lock); 1276 } 1277 break; 1278 } 1279 } 1280 1281 static void 1282 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1283 { 1284 1285 KASSERT(mutex_owned(sc->sc_lock)); 1286 1287 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, ub->ub_len, 1288 0, USBD_NO_TIMEOUT, ucomwritecb); 1289 1290 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1291 } 1292 1293 static void 1294 ucomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status) 1295 { 1296 struct ucom_softc *sc = (struct ucom_softc *)p; 1297 1298 mutex_enter(sc->sc_lock); 1299 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1300 mutex_exit(sc->sc_lock); 1301 1302 } 1303 1304 static void 1305 ucom_softintr(void *arg) 1306 { 1307 struct ucom_softc *sc = arg; 1308 struct tty *tp = sc->sc_tty; 1309 struct ucom_buffer *ub; 1310 1311 mutex_enter(sc->sc_lock); 1312 mutex_enter(&tty_lock); 1313 if (!ISSET(tp->t_state, TS_ISOPEN)) { 1314 mutex_exit(&tty_lock); 1315 mutex_exit(sc->sc_lock); 1316 return; 1317 } 1318 mutex_exit(&tty_lock); 1319 1320 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1321 1322 if (ub != NULL && ub->ub_index == 0) 1323 ucom_submit_write(sc, ub); 1324 1325 if (sc->sc_rx_unblock) 1326 ucom_read_complete(sc); 1327 1328 mutex_exit(sc->sc_lock); 1329 } 1330 1331 static void 1332 ucom_read_complete(struct ucom_softc *sc) 1333 { 1334 int (*rint)(int, struct tty *); 1335 struct ucom_buffer *ub; 1336 struct tty *tp; 1337 1338 KASSERT(mutex_owned(sc->sc_lock)); 1339 1340 tp = sc->sc_tty; 1341 rint = tp->t_linesw->l_rint; 1342 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1343 1344 while (ub != NULL && !sc->sc_rx_stopped) { 1345 1346 /* XXX ttyinput takes tty_lock */ 1347 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1348 /* Give characters to tty layer. */ 1349 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1350 /* Overflow: drop remainder */ 1351 ub->ub_index = ub->ub_len; 1352 } else 1353 ub->ub_index++; 1354 } 1355 1356 if (ub->ub_index == ub->ub_len) { 1357 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1358 1359 ucomsubmitread(sc, ub); 1360 1361 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1362 } 1363 } 1364 1365 sc->sc_rx_unblock = (ub != NULL); 1366 } 1367 1368 static usbd_status 1369 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1370 { 1371 usbd_status err; 1372 1373 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, sc->sc_ibufsize, 1374 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ucomreadcb); 1375 1376 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1377 /* XXX: Recover from this, please! */ 1378 printf("ucomsubmitread: err=%s\n", usbd_errstr(err)); 1379 return err; 1380 } 1381 1382 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1383 1384 return USBD_NORMAL_COMPLETION; 1385 } 1386 1387 static void 1388 ucomreadcb(struct usbd_xfer *xfer, void *p, usbd_status status) 1389 { 1390 struct ucom_softc *sc = (struct ucom_softc *)p; 1391 struct tty *tp = sc->sc_tty; 1392 struct ucom_buffer *ub; 1393 uint32_t cc; 1394 u_char *cp; 1395 1396 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1397 1398 mutex_enter(sc->sc_lock); 1399 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1400 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1401 1402 if (status == USBD_CANCELLED || status == USBD_IOERROR || 1403 sc->sc_dying) { 1404 DPRINTF("dying", 0, 0, 0, 0); 1405 ub->ub_index = ub->ub_len = 0; 1406 /* Send something to wake upper layer */ 1407 if (status != USBD_CANCELLED) { 1408 (tp->t_linesw->l_rint)('\n', tp); 1409 mutex_spin_enter(&tty_lock); /* XXX */ 1410 ttwakeup(tp); 1411 mutex_spin_exit(&tty_lock); /* XXX */ 1412 } 1413 mutex_exit(sc->sc_lock); 1414 return; 1415 } 1416 1417 if (status == USBD_STALLED) { 1418 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1419 ucomsubmitread(sc, ub); 1420 mutex_exit(sc->sc_lock); 1421 return; 1422 } 1423 1424 if (status != USBD_NORMAL_COMPLETION) { 1425 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1426 mutex_exit(sc->sc_lock); 1427 return; 1428 } 1429 1430 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1431 1432 #ifdef UCOM_DEBUG 1433 /* This is triggered by uslsa(4) occasionally. */ 1434 if ((ucomdebug > 0) && (cc == 0)) { 1435 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1436 } 1437 #endif 1438 1439 KDASSERT(cp == ub->ub_data); 1440 1441 rnd_add_uint32(&sc->sc_rndsource, cc); 1442 1443 if (sc->sc_opening) { 1444 ucomsubmitread(sc, ub); 1445 mutex_exit(sc->sc_lock); 1446 return; 1447 } 1448 1449 if (sc->sc_methods->ucom_read != NULL) { 1450 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1451 &cp, &cc); 1452 ub->ub_index = (u_int)(cp - ub->ub_data); 1453 } else 1454 ub->ub_index = 0; 1455 1456 ub->ub_len = cc; 1457 1458 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1459 1460 ucom_read_complete(sc); 1461 mutex_exit(sc->sc_lock); 1462 } 1463 1464 static void 1465 ucom_cleanup(struct ucom_softc *sc) 1466 { 1467 1468 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1469 1470 DPRINTF("aborting pipes", 0, 0, 0, 0); 1471 1472 KASSERT(mutex_owned(sc->sc_lock)); 1473 1474 ucom_shutdown(sc); 1475 if (sc->sc_bulkin_pipe != NULL) { 1476 struct usbd_pipe *bulkin_pipe = sc->sc_bulkin_pipe; 1477 sc->sc_bulkin_pipe = NULL; 1478 mutex_exit(sc->sc_lock); 1479 usbd_abort_pipe(bulkin_pipe); 1480 mutex_enter(sc->sc_lock); 1481 } 1482 if (sc->sc_bulkout_pipe != NULL) { 1483 struct usbd_pipe *bulkout_pipe = sc->sc_bulkout_pipe; 1484 sc->sc_bulkout_pipe = NULL; 1485 mutex_exit(sc->sc_lock); 1486 usbd_abort_pipe(bulkout_pipe); 1487 mutex_enter(sc->sc_lock); 1488 } 1489 } 1490 1491 #endif /* NUCOM > 0 */ 1492 1493 int 1494 ucomprint(void *aux, const char *pnp) 1495 { 1496 struct ucom_attach_args *uca = aux; 1497 1498 if (pnp) 1499 aprint_normal("ucom at %s", pnp); 1500 if (uca->portno != UCOM_UNK_PORTNO) 1501 aprint_normal(" portno %d", uca->portno); 1502 return UNCONF; 1503 } 1504 1505 int 1506 ucomsubmatch(device_t parent, cfdata_t cf, 1507 const int *ldesc, void *aux) 1508 { 1509 struct ucom_attach_args *uca = aux; 1510 1511 if (uca->portno != UCOM_UNK_PORTNO && 1512 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1513 cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno) 1514 return 0; 1515 return config_match(parent, cf, aux); 1516 } 1517
Indexes created Tue Oct 21 08:09:48 GMT 2025