ucom.c revision 1.108.2.25
1 /* $NetBSD: ucom.c,v 1.108.2.25 2016/10/27 12:30:54 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 1.108.2.25 2016/10/27 12:30:54 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 struct usbd_interface *sc_iface; /* data interface */ 143 144 int sc_bulkin_no; /* bulk in endpoint address */ 145 struct usbd_pipe *sc_bulkin_pipe; /* bulk in pipe */ 146 u_int sc_ibufsize; /* read buffer size */ 147 u_int sc_ibufsizepad; /* read buffer size padded */ 148 struct ucom_buffer sc_ibuff[UCOM_IN_BUFFS]; 149 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_empty; 150 SIMPLEQ_HEAD(, ucom_buffer) sc_ibuff_full; 151 152 int sc_bulkout_no; /* bulk out endpoint address */ 153 struct usbd_pipe *sc_bulkout_pipe;/* bulk out pipe */ 154 u_int sc_obufsize; /* write buffer size */ 155 u_int sc_opkthdrlen; /* header length of */ 156 struct ucom_buffer sc_obuff[UCOM_OUT_BUFFS]; 157 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_free; 158 SIMPLEQ_HEAD(, ucom_buffer) sc_obuff_full; 159 160 struct usbd_pipe *sc_ipipe; 161 struct usbd_xfer *sc_ixfer; 162 struct usbd_pipe *sc_opipe; 163 struct usbd_xfer *sc_oxfer; 164 165 void *sc_si; 166 167 const struct ucom_methods *sc_methods; 168 void *sc_parent; 169 int sc_portno; 170 171 struct tty *sc_tty; /* our tty */ 172 u_char sc_lsr; 173 u_char sc_msr; 174 u_char sc_mcr; 175 volatile u_char sc_rx_stopped; 176 u_char sc_rx_unblock; 177 u_char sc_tx_stopped; 178 int sc_swflags; 179 180 u_char sc_opening; /* lock during open */ 181 u_char sc_closing; /* lock during close */ 182 int sc_refcnt; 183 bool sc_dying; /* disconnecting */ 184 185 struct pps_state sc_pps_state; /* pps state */ 186 187 krndsource_t sc_rndsource; /* random source */ 188 189 kmutex_t sc_lock; 190 kcondvar_t sc_opencv; 191 kcondvar_t sc_detachcv; 192 }; 193 194 dev_type_open(ucomopen); 195 dev_type_close(ucomclose); 196 dev_type_read(ucomread); 197 dev_type_write(ucomwrite); 198 dev_type_ioctl(ucomioctl); 199 dev_type_stop(ucomstop); 200 dev_type_tty(ucomtty); 201 dev_type_poll(ucompoll); 202 203 const struct cdevsw ucom_cdevsw = { 204 .d_open = ucomopen, 205 .d_close = ucomclose, 206 .d_read = ucomread, 207 .d_write = ucomwrite, 208 .d_ioctl = ucomioctl, 209 .d_stop = ucomstop, 210 .d_tty = ucomtty, 211 .d_poll = ucompoll, 212 .d_mmap = nommap, 213 .d_kqfilter = ttykqfilter, 214 .d_discard = nodiscard, 215 .d_flag = D_TTY | D_MPSAFE 216 }; 217 218 static void ucom_cleanup(struct ucom_softc *); 219 static int ucomparam(struct tty *, struct termios *); 220 static int ucomhwiflow(struct tty *, int); 221 static void ucomstart(struct tty *); 222 static void ucom_shutdown(struct ucom_softc *); 223 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 224 int, struct lwp *); 225 static void ucom_dtr(struct ucom_softc *, int); 226 static void ucom_rts(struct ucom_softc *, int); 227 static void ucom_break(struct ucom_softc *, int); 228 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 229 static int ucom_to_tiocm(struct ucom_softc *); 230 231 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 232 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 233 usbd_status); 234 235 static void ucomwritecb(struct usbd_xfer *, void *, usbd_status); 236 static void ucom_read_complete(struct ucom_softc *); 237 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 238 static void ucom_softintr(void *); 239 240 int ucom_match(device_t, cfdata_t, void *); 241 void ucom_attach(device_t, device_t, void *); 242 int ucom_detach(device_t, int); 243 int ucom_activate(device_t, enum devact); 244 extern struct cfdriver ucom_cd; 245 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 246 ucom_detach, ucom_activate); 247 248 int 249 ucom_match(device_t parent, cfdata_t match, void *aux) 250 { 251 return 1; 252 } 253 254 void 255 ucom_attach(device_t parent, device_t self, void *aux) 256 { 257 struct ucom_softc *sc = device_private(self); 258 struct ucom_attach_args *ucaa = aux; 259 260 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 261 262 if (ucaa->ucaa_info != NULL) 263 aprint_normal(": %s", ucaa->ucaa_info); 264 aprint_normal("\n"); 265 266 prop_dictionary_set_int32(device_properties(self), "port", 267 ucaa->ucaa_portno); 268 269 //KASSERT(ucaa->ucaa_bulkin != -1 || (ucaa->ucaa_ipipe && ucaa->ucaa_ixfer)); 270 //KASSERT(ucaa->ucaa_bulkout != -1 || (ucaa->ucaa_opipe && ucaa->ucaa_oxfer)); 271 272 sc->sc_dev = self; 273 sc->sc_udev = ucaa->ucaa_device; 274 sc->sc_iface = ucaa->ucaa_iface; 275 sc->sc_bulkout_no = ucaa->ucaa_bulkout; 276 sc->sc_bulkin_no = ucaa->ucaa_bulkin; 277 sc->sc_ibufsize = ucaa->ucaa_ibufsize; 278 sc->sc_ibufsizepad = ucaa->ucaa_ibufsizepad; 279 sc->sc_obufsize = ucaa->ucaa_obufsize; 280 sc->sc_opkthdrlen = ucaa->ucaa_opkthdrlen; 281 sc->sc_methods = ucaa->ucaa_methods; 282 sc->sc_parent = ucaa->ucaa_arg; 283 sc->sc_portno = ucaa->ucaa_portno; 284 285 sc->sc_lsr = 0; 286 sc->sc_msr = 0; 287 sc->sc_mcr = 0; 288 sc->sc_tx_stopped = 0; 289 sc->sc_swflags = 0; 290 sc->sc_opening = 0; 291 sc->sc_closing = 0; 292 sc->sc_refcnt = 0; 293 sc->sc_dying = false; 294 295 sc->sc_si = softint_establish(SOFTINT_USB, ucom_softintr, sc); 296 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 297 cv_init(&sc->sc_opencv, "ucomopen"); 298 cv_init(&sc->sc_detachcv, "ucomdtch"); 299 300 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 301 SIMPLEQ_INIT(&sc->sc_ibuff_full); 302 SIMPLEQ_INIT(&sc->sc_obuff_free); 303 SIMPLEQ_INIT(&sc->sc_obuff_full); 304 305 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 306 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 307 308 DPRINTF("open pipes in=%d out=%d", sc->sc_bulkin_no, sc->sc_bulkout_no, 309 0, 0); 310 311 struct ucom_buffer *ub; 312 usbd_status err; 313 int error; 314 315 if (sc->sc_bulkin_no != -1) { 316 /* Open the bulk pipes */ 317 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 318 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 319 if (err) { 320 DPRINTF("open bulk in error (addr %d), err=%d", 321 sc->sc_bulkin_no, err, 0, 0); 322 error = EIO; 323 goto fail_0; 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, 329 sc->sc_ibufsizepad, USBD_SHORT_XFER_OK, 0, 330 &ub->ub_xfer); 331 if (error) 332 goto fail_1; 333 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 334 } 335 336 } 337 338 if (sc->sc_bulkout_no != -1) { 339 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 340 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 341 if (err) { 342 DPRINTF("open bulk out error (addr %d), err=%d", 343 sc->sc_bulkout_no, err, 0, 0); 344 error = EIO; 345 goto fail_1; 346 } 347 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 348 ub++) { 349 error = usbd_create_xfer(sc->sc_bulkout_pipe, 350 sc->sc_obufsize, 0, 0, &ub->ub_xfer); 351 if (error) 352 goto fail_2; 353 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 354 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 355 } 356 } 357 358 if (sc->sc_ipipe && sc->sc_ixfer) { 359 ub = &sc->sc_ibuff[0]; 360 ub->ub_data = usbd_get_buffer(sc->sc_ixfer); 361 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 362 } 363 if (sc->sc_opipe && sc->sc_oxfer) { 364 ub = &sc->sc_obuff[0]; 365 ub->ub_data = usbd_get_buffer(sc->sc_oxfer); 366 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 367 } 368 369 struct tty *tp = tty_alloc(); 370 tp->t_oproc = ucomstart; 371 tp->t_param = ucomparam; 372 tp->t_hwiflow = ucomhwiflow; 373 sc->sc_tty = tp; 374 375 DPRINTF("tty_attach %p", tp, 0, 0, 0); 376 tty_attach(tp); 377 378 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 379 RND_TYPE_TTY, RND_FLAG_DEFAULT); 380 381 if (!pmf_device_register(self, NULL, NULL)) 382 aprint_error_dev(self, "couldn't establish power handler\n"); 383 return; 384 385 fail_2: 386 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 387 ub++) { 388 if (ub->ub_xfer) 389 usbd_destroy_xfer(ub->ub_xfer); 390 } 391 392 usbd_close_pipe(sc->sc_bulkout_pipe); 393 394 fail_1: 395 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 396 ub++) { 397 if (ub->ub_xfer) 398 usbd_destroy_xfer(ub->ub_xfer); 399 } 400 usbd_close_pipe(sc->sc_bulkin_pipe); 401 402 fail_0: 403 aprint_error_dev(self, "attach failed, error=%d\n", error); 404 405 return; 406 } 407 408 int 409 ucom_detach(device_t self, int flags) 410 { 411 struct ucom_softc *sc = device_private(self); 412 struct tty *tp = sc->sc_tty; 413 int maj, mn; 414 int i; 415 416 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 417 418 DPRINTF("sc=%p flags=%d tp=%p", sc, flags, tp, 0); 419 DPRINTF("... pipe=%d,%d", sc->sc_bulkin_no, sc->sc_bulkout_no, 0, 0); 420 421 mutex_enter(&sc->sc_lock); 422 sc->sc_dying = true; 423 mutex_exit(&sc->sc_lock); 424 425 pmf_device_deregister(self); 426 427 if (sc->sc_bulkin_pipe != NULL) 428 usbd_abort_pipe(sc->sc_bulkin_pipe); 429 if (sc->sc_bulkout_pipe != NULL) 430 usbd_abort_pipe(sc->sc_bulkout_pipe); 431 432 mutex_enter(&sc->sc_lock); 433 while (sc->sc_refcnt > 0) { 434 /* Wake up anyone waiting */ 435 if (tp != NULL) { 436 mutex_spin_enter(&tty_lock); 437 CLR(tp->t_state, TS_CARR_ON); 438 CLR(tp->t_cflag, CLOCAL | MDMBUF); 439 ttyflush(tp, FREAD|FWRITE); 440 mutex_spin_exit(&tty_lock); 441 } 442 /* Wait for processes to go away. */ 443 if (cv_timedwait(&sc->sc_detachcv, &sc->sc_lock, hz * 60)) { 444 printf("%s: %s didn't detach\n", __func__, 445 device_xname(sc->sc_dev)); 446 } 447 } 448 449 softint_disestablish(sc->sc_si); 450 mutex_exit(&sc->sc_lock); 451 452 /* locate the major number */ 453 maj = cdevsw_lookup_major(&ucom_cdevsw); 454 455 /* Nuke the vnodes for any open instances. */ 456 mn = device_unit(self); 457 DPRINTF("maj=%d mn=%d", maj, mn, 0, 0); 458 vdevgone(maj, mn, mn, VCHR); 459 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 460 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 461 462 /* Detach and free the tty. */ 463 if (tp != NULL) { 464 tty_detach(tp); 465 tty_free(tp); 466 sc->sc_tty = NULL; 467 } 468 469 for (i = 0; i < UCOM_IN_BUFFS; i++) { 470 if (sc->sc_ibuff[i].ub_xfer != NULL) 471 usbd_destroy_xfer(sc->sc_ibuff[i].ub_xfer); 472 } 473 474 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 475 if (sc->sc_obuff[i].ub_xfer != NULL) 476 usbd_destroy_xfer(sc->sc_obuff[i].ub_xfer); 477 } 478 479 if (sc->sc_bulkin_pipe != NULL) { 480 usbd_close_pipe(sc->sc_bulkin_pipe); 481 sc->sc_bulkin_pipe = NULL; 482 } 483 484 if (sc->sc_bulkout_pipe != NULL) { 485 usbd_close_pipe(sc->sc_bulkout_pipe); 486 sc->sc_bulkout_pipe = NULL; 487 } 488 489 /* Detach the random source */ 490 rnd_detach_source(&sc->sc_rndsource); 491 492 mutex_destroy(&sc->sc_lock); 493 cv_destroy(&sc->sc_opencv); 494 cv_destroy(&sc->sc_detachcv); 495 496 return 0; 497 } 498 499 int 500 ucom_activate(device_t self, enum devact act) 501 { 502 struct ucom_softc *sc = device_private(self); 503 504 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 505 506 DPRINTFN(5, "%d", act, 0, 0, 0); 507 508 switch (act) { 509 case DVACT_DEACTIVATE: 510 mutex_enter(&sc->sc_lock); 511 sc->sc_dying = true; 512 mutex_exit(&sc->sc_lock); 513 return 0; 514 default: 515 return EOPNOTSUPP; 516 } 517 } 518 519 void 520 ucom_shutdown(struct ucom_softc *sc) 521 { 522 struct tty *tp = sc->sc_tty; 523 524 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 525 526 KASSERT(mutex_owned(&sc->sc_lock)); 527 /* 528 * Hang up if necessary. Wait a bit, so the other side has time to 529 * notice even if we immediately open the port again. 530 */ 531 if (ISSET(tp->t_cflag, HUPCL)) { 532 ucom_dtr(sc, 0); 533 /* XXX will only timeout */ 534 (void) kpause(ttclos, false, hz, &sc->sc_lock); 535 } 536 } 537 538 int 539 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 540 { 541 const int unit = UCOMUNIT(dev); 542 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 543 struct ucom_buffer *ub; 544 int error; 545 546 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 547 548 if (sc == NULL) 549 return ENXIO; 550 551 mutex_enter(&sc->sc_lock); 552 if (sc->sc_dying) { 553 mutex_exit(&sc->sc_lock); 554 return EIO; 555 } 556 557 if (!device_is_active(sc->sc_dev)) { 558 mutex_exit(&sc->sc_lock); 559 return ENXIO; 560 } 561 562 struct tty *tp = sc->sc_tty; 563 564 DPRINTF("unit=%d, tp=%p", unit, tp, 0, 0); 565 566 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) { 567 mutex_exit(&sc->sc_lock); 568 return EBUSY; 569 } 570 571 /* 572 * Wait while the device is initialized by the 573 * first opener or cleaned up by the last closer. 574 */ 575 while (sc->sc_opening || sc->sc_closing) { 576 error = cv_wait_sig(&sc->sc_opencv, &sc->sc_lock); 577 578 if (error) { 579 mutex_exit(&sc->sc_lock); 580 return error; 581 } 582 } 583 584 sc->sc_opening = 1; 585 586 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 587 struct termios t; 588 589 tp->t_dev = dev; 590 591 if (sc->sc_methods->ucom_open != NULL) { 592 error = sc->sc_methods->ucom_open(sc->sc_parent, 593 sc->sc_portno); 594 if (error) { 595 ucom_cleanup(sc); 596 sc->sc_opening = 0; 597 cv_signal(&sc->sc_opencv); 598 mutex_exit(&sc->sc_lock); 599 return error; 600 } 601 } 602 603 ucom_status_change(sc); 604 605 /* Clear PPS capture state on first open. */ 606 mutex_spin_enter(&timecounter_lock); 607 memset(&sc->sc_pps_state, 0, sizeof(sc->sc_pps_state)); 608 sc->sc_pps_state.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 609 pps_init(&sc->sc_pps_state); 610 mutex_spin_exit(&timecounter_lock); 611 612 /* 613 * Initialize the termios status to the defaults. Add in the 614 * sticky bits from TIOCSFLAGS. 615 */ 616 t.c_ispeed = 0; 617 t.c_ospeed = TTYDEF_SPEED; 618 t.c_cflag = TTYDEF_CFLAG; 619 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 620 SET(t.c_cflag, CLOCAL); 621 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 622 SET(t.c_cflag, CRTSCTS); 623 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 624 SET(t.c_cflag, MDMBUF); 625 /* Make sure ucomparam() will do something. */ 626 tp->t_ospeed = 0; 627 (void) ucomparam(tp, &t); 628 tp->t_iflag = TTYDEF_IFLAG; 629 tp->t_oflag = TTYDEF_OFLAG; 630 tp->t_lflag = TTYDEF_LFLAG; 631 ttychars(tp); 632 ttsetwater(tp); 633 634 /* 635 * Turn on DTR. We must always do this, even if carrier is not 636 * present, because otherwise we'd have to use TIOCSDTR 637 * immediately after setting CLOCAL, which applications do not 638 * expect. We always assert DTR while the device is open 639 * unless explicitly requested to deassert it. Ditto RTS. 640 */ 641 ucom_dtr(sc, 1); 642 ucom_rts(sc, 1); 643 644 sc->sc_rx_unblock = 0; 645 sc->sc_rx_stopped = 0; 646 sc->sc_tx_stopped = 0; 647 648 /* 649 * ucomsubmitread handles bulk vs other 650 */ 651 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 652 ub++) { 653 if (ucomsubmitread(sc, ub) != USBD_NORMAL_COMPLETION) { 654 error = EIO; 655 goto fail_2; 656 } 657 } 658 } 659 sc->sc_opening = 0; 660 cv_signal(&sc->sc_opencv); 661 mutex_exit(&sc->sc_lock); 662 663 error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 664 if (error) 665 goto bad; 666 667 error = (*tp->t_linesw->l_open)(dev, tp); 668 if (error) 669 goto bad; 670 671 return 0; 672 673 fail_2: 674 if (sc->sc_bulkin_no != -1) 675 usbd_abort_pipe(sc->sc_bulkin_pipe); 676 if (sc->sc_bulkout_no != -1) 677 usbd_abort_pipe(sc->sc_bulkout_pipe); 678 679 mutex_enter(&sc->sc_lock); 680 sc->sc_opening = 0; 681 cv_signal(&sc->sc_opencv); 682 mutex_exit(&sc->sc_lock); 683 684 return error; 685 686 bad: 687 mutex_spin_enter(&tty_lock); 688 CLR(tp->t_state, TS_BUSY); 689 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 690 /* 691 * We failed to open the device, and nobody else had it opened. 692 * Clean up the state as appropriate. 693 */ 694 ucom_cleanup(sc); 695 } 696 mutex_spin_exit(&tty_lock); 697 698 return error; 699 } 700 701 int 702 ucomclose(dev_t dev, int flag, int mode, struct lwp *l) 703 { 704 const int unit = UCOMUNIT(dev); 705 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 706 707 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 708 709 DPRINTF("unit=%d", UCOMUNIT(dev), 0, 0, 0); 710 711 if (sc == NULL) 712 return 0; 713 714 mutex_enter(&sc->sc_lock); 715 struct tty *tp = sc->sc_tty; 716 717 while (sc->sc_closing) 718 cv_wait(&sc->sc_opencv, &sc->sc_lock); 719 sc->sc_closing = 1; 720 721 if (!ISSET(tp->t_state, TS_ISOPEN)) { 722 goto out; 723 } 724 725 sc->sc_refcnt++; 726 727 (*tp->t_linesw->l_close)(tp, flag); 728 ttyclose(tp); 729 730 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 731 /* 732 * Although we got a last close, the device may still be in 733 * use; e.g. if this was the dialout node, and there are still 734 * processes waiting for carrier on the non-dialout node. 735 */ 736 ucom_cleanup(sc); 737 } 738 739 if (sc->sc_methods->ucom_close != NULL) 740 sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); 741 742 if (--sc->sc_refcnt < 0) 743 cv_broadcast(&sc->sc_detachcv); 744 745 out: 746 sc->sc_closing = 0; 747 cv_signal(&sc->sc_opencv); 748 749 mutex_exit(&sc->sc_lock); 750 751 return 0; 752 } 753 754 int 755 ucomread(dev_t dev, struct uio *uio, int flag) 756 { 757 const int unit = UCOMUNIT(dev); 758 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 759 int error; 760 761 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 762 763 if (sc == NULL) 764 return EIO; 765 766 mutex_enter(&sc->sc_lock); 767 if (sc->sc_dying) { 768 mutex_exit(&sc->sc_lock); 769 return EIO; 770 } 771 772 struct tty *tp = sc->sc_tty; 773 774 sc->sc_refcnt++; 775 mutex_exit(&sc->sc_lock); 776 777 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 778 779 mutex_enter(&sc->sc_lock); 780 if (--sc->sc_refcnt < 0) 781 cv_broadcast(&sc->sc_detachcv); 782 mutex_exit(&sc->sc_lock); 783 784 return error; 785 } 786 787 int 788 ucomwrite(dev_t dev, struct uio *uio, int flag) 789 { 790 const int unit = UCOMUNIT(dev); 791 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 792 int error; 793 794 if (sc == NULL) 795 return EIO; 796 797 mutex_enter(&sc->sc_lock); 798 if (sc->sc_dying) { 799 mutex_exit(&sc->sc_lock); 800 return EIO; 801 } 802 803 struct tty *tp = sc->sc_tty; 804 805 sc->sc_refcnt++; 806 mutex_exit(&sc->sc_lock); 807 808 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 809 810 mutex_enter(&sc->sc_lock); 811 if (--sc->sc_refcnt < 0) 812 cv_broadcast(&sc->sc_detachcv); 813 mutex_exit(&sc->sc_lock); 814 815 return error; 816 } 817 818 int 819 ucompoll(dev_t dev, int events, struct lwp *l) 820 { 821 const int unit = UCOMUNIT(dev); 822 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 823 824 if (sc == NULL) 825 return POLLHUP; 826 827 mutex_enter(&sc->sc_lock); 828 if (sc->sc_dying) { 829 mutex_exit(&sc->sc_lock); 830 return POLLHUP; 831 } 832 struct tty *tp = sc->sc_tty; 833 834 sc->sc_refcnt++; 835 mutex_exit(&sc->sc_lock); 836 837 int revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 838 839 mutex_enter(&sc->sc_lock); 840 if (--sc->sc_refcnt < 0) 841 cv_broadcast(&sc->sc_detachcv); 842 mutex_exit(&sc->sc_lock); 843 844 return revents; 845 } 846 847 struct tty * 848 ucomtty(dev_t dev) 849 { 850 const int unit = UCOMUNIT(dev); 851 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 852 853 return sc != NULL ? sc->sc_tty : NULL; 854 } 855 856 int 857 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 858 { 859 const int unit = UCOMUNIT(dev); 860 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 861 int error; 862 863 if (sc == NULL) 864 return EIO; 865 866 mutex_enter(&sc->sc_lock); 867 if (sc->sc_dying) { 868 mutex_exit(&sc->sc_lock); 869 return EIO; 870 } 871 872 sc->sc_refcnt++; 873 mutex_exit(&sc->sc_lock); 874 875 error = ucom_do_ioctl(sc, cmd, data, flag, l); 876 877 mutex_enter(&sc->sc_lock); 878 if (--sc->sc_refcnt < 0) 879 cv_broadcast(&sc->sc_detachcv); 880 mutex_exit(&sc->sc_lock); 881 882 return error; 883 } 884 885 static int 886 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, int flag, 887 struct lwp *l) 888 { 889 struct tty *tp = sc->sc_tty; 890 int error; 891 892 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 893 894 DPRINTF("cmd=0x%08lx", cmd, 0, 0, 0); 895 896 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 897 if (error != EPASSTHROUGH) 898 return error; 899 900 error = ttioctl(tp, cmd, data, flag, l); 901 if (error != EPASSTHROUGH) 902 return error; 903 904 if (sc->sc_methods->ucom_ioctl != NULL) { 905 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 906 sc->sc_portno, cmd, data, flag, l->l_proc); 907 if (error != EPASSTHROUGH) 908 return error; 909 } 910 911 error = 0; 912 913 DPRINTF("our cmd=0x%08lx", cmd, 0, 0, 0); 914 //mutex_enter(&tty_lock); 915 916 switch (cmd) { 917 case TIOCSBRK: 918 ucom_break(sc, 1); 919 break; 920 921 case TIOCCBRK: 922 ucom_break(sc, 0); 923 break; 924 925 case TIOCSDTR: 926 ucom_dtr(sc, 1); 927 break; 928 929 case TIOCCDTR: 930 ucom_dtr(sc, 0); 931 break; 932 933 case TIOCGFLAGS: 934 mutex_enter(&sc->sc_lock); 935 *(int *)data = sc->sc_swflags; 936 mutex_exit(&sc->sc_lock); 937 break; 938 939 case TIOCSFLAGS: 940 error = kauth_authorize_device_tty(l->l_cred, 941 KAUTH_DEVICE_TTY_PRIVSET, tp); 942 if (error) 943 break; 944 mutex_enter(&sc->sc_lock); 945 sc->sc_swflags = *(int *)data; 946 mutex_exit(&sc->sc_lock); 947 break; 948 949 case TIOCMSET: 950 case TIOCMBIS: 951 case TIOCMBIC: 952 tiocm_to_ucom(sc, cmd, *(int *)data); 953 break; 954 955 case TIOCMGET: 956 *(int *)data = ucom_to_tiocm(sc); 957 break; 958 959 case PPS_IOC_CREATE: 960 case PPS_IOC_DESTROY: 961 case PPS_IOC_GETPARAMS: 962 case PPS_IOC_SETPARAMS: 963 case PPS_IOC_GETCAP: 964 case PPS_IOC_FETCH: 965 #ifdef PPS_SYNC 966 case PPS_IOC_KCBIND: 967 #endif 968 mutex_spin_enter(&timecounter_lock); 969 error = pps_ioctl(cmd, data, &sc->sc_pps_state); 970 mutex_spin_exit(&timecounter_lock); 971 break; 972 973 default: 974 error = EPASSTHROUGH; 975 break; 976 } 977 978 //mutex_exit(&tty_lock); 979 980 return error; 981 } 982 983 static void 984 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 985 { 986 u_char combits; 987 988 combits = 0; 989 if (ISSET(ttybits, TIOCM_DTR)) 990 SET(combits, UMCR_DTR); 991 if (ISSET(ttybits, TIOCM_RTS)) 992 SET(combits, UMCR_RTS); 993 994 mutex_enter(&sc->sc_lock); 995 switch (how) { 996 case TIOCMBIC: 997 CLR(sc->sc_mcr, combits); 998 break; 999 1000 case TIOCMBIS: 1001 SET(sc->sc_mcr, combits); 1002 break; 1003 1004 case TIOCMSET: 1005 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 1006 SET(sc->sc_mcr, combits); 1007 break; 1008 } 1009 mutex_exit(&sc->sc_lock); 1010 1011 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 1012 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 1013 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 1014 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 1015 } 1016 1017 static int 1018 ucom_to_tiocm(struct ucom_softc *sc) 1019 { 1020 u_char combits; 1021 int ttybits = 0; 1022 1023 mutex_enter(&sc->sc_lock); 1024 combits = sc->sc_mcr; 1025 if (ISSET(combits, UMCR_DTR)) 1026 SET(ttybits, TIOCM_DTR); 1027 if (ISSET(combits, UMCR_RTS)) 1028 SET(ttybits, TIOCM_RTS); 1029 1030 combits = sc->sc_msr; 1031 if (ISSET(combits, UMSR_DCD)) 1032 SET(ttybits, TIOCM_CD); 1033 if (ISSET(combits, UMSR_CTS)) 1034 SET(ttybits, TIOCM_CTS); 1035 if (ISSET(combits, UMSR_DSR)) 1036 SET(ttybits, TIOCM_DSR); 1037 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 1038 SET(ttybits, TIOCM_RI); 1039 1040 #if 0 1041 XXX; 1042 if (sc->sc_ier != 0) 1043 SET(ttybits, TIOCM_LE); 1044 #endif 1045 mutex_exit(&sc->sc_lock); 1046 1047 return ttybits; 1048 } 1049 1050 static void 1051 ucom_break(struct ucom_softc *sc, int onoff) 1052 { 1053 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1054 1055 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1056 1057 if (sc->sc_methods->ucom_set != NULL) 1058 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1059 UCOM_SET_BREAK, onoff); 1060 } 1061 1062 static void 1063 ucom_dtr(struct ucom_softc *sc, int onoff) 1064 { 1065 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1066 1067 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1068 1069 if (sc->sc_methods->ucom_set != NULL) 1070 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1071 UCOM_SET_DTR, onoff); 1072 } 1073 1074 static void 1075 ucom_rts(struct ucom_softc *sc, int onoff) 1076 { 1077 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1078 1079 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1080 1081 if (sc->sc_methods->ucom_set != NULL) 1082 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1083 UCOM_SET_RTS, onoff); 1084 } 1085 1086 void 1087 ucom_status_change(struct ucom_softc *sc) 1088 { 1089 struct tty *tp = sc->sc_tty; 1090 u_char old_msr; 1091 1092 if (sc->sc_methods->ucom_get_status != NULL) { 1093 old_msr = sc->sc_msr; 1094 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 1095 &sc->sc_lsr, &sc->sc_msr); 1096 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) { 1097 mutex_spin_enter(&timecounter_lock); 1098 pps_capture(&sc->sc_pps_state); 1099 pps_event(&sc->sc_pps_state, 1100 (sc->sc_msr & UMSR_DCD) ? 1101 PPS_CAPTUREASSERT : 1102 PPS_CAPTURECLEAR); 1103 mutex_spin_exit(&timecounter_lock); 1104 1105 (*tp->t_linesw->l_modem)(tp, 1106 ISSET(sc->sc_msr, UMSR_DCD)); 1107 } 1108 } else { 1109 sc->sc_lsr = 0; 1110 /* Assume DCD is present, if we have no chance to check it. */ 1111 sc->sc_msr = UMSR_DCD; 1112 } 1113 } 1114 1115 static int 1116 ucomparam(struct tty *tp, struct termios *t) 1117 { 1118 const int unit = UCOMUNIT(tp->t_dev); 1119 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 1120 int error; 1121 1122 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1123 1124 if (sc == NULL || sc->sc_dying) 1125 return EIO; 1126 1127 /* Check requested parameters. */ 1128 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1129 return EINVAL; 1130 1131 /* 1132 * For the console, always force CLOCAL and !HUPCL, so that the port 1133 * is always active. 1134 */ 1135 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1136 SET(t->c_cflag, CLOCAL); 1137 CLR(t->c_cflag, HUPCL); 1138 } 1139 1140 /* 1141 * If there were no changes, don't do anything. This avoids dropping 1142 * input and improves performance when all we did was frob things like 1143 * VMIN and VTIME. 1144 */ 1145 if (tp->t_ospeed == t->c_ospeed && 1146 tp->t_cflag == t->c_cflag) 1147 return 0; 1148 1149 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 1150 1151 /* And copy to tty. */ 1152 tp->t_ispeed = 0; 1153 tp->t_ospeed = t->c_ospeed; 1154 tp->t_cflag = t->c_cflag; 1155 1156 if (sc->sc_methods->ucom_param != NULL) { 1157 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 1158 t); 1159 if (error) 1160 return error; 1161 } 1162 1163 /* XXX worry about CHWFLOW */ 1164 1165 /* 1166 * Update the tty layer's idea of the carrier bit, in case we changed 1167 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1168 * explicit request. 1169 */ 1170 DPRINTF("l_modem", 0, 0, 0, 0); 1171 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 1172 1173 #if 0 1174 XXX what if the hardware is not open 1175 if (!ISSET(t->c_cflag, CHWFLOW)) { 1176 if (sc->sc_tx_stopped) { 1177 sc->sc_tx_stopped = 0; 1178 ucomstart(tp); 1179 } 1180 } 1181 #endif 1182 1183 return 0; 1184 } 1185 1186 static int 1187 ucomhwiflow(struct tty *tp, int block) 1188 { 1189 const int unit = UCOMUNIT(tp->t_dev); 1190 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 1191 int old; 1192 1193 if (sc == NULL) 1194 return 0; 1195 1196 mutex_enter(&sc->sc_lock); 1197 old = sc->sc_rx_stopped; 1198 sc->sc_rx_stopped = (u_char)block; 1199 1200 if (old && !block) { 1201 sc->sc_rx_unblock = 1; 1202 softint_schedule(sc->sc_si); 1203 } 1204 mutex_exit(&sc->sc_lock); 1205 1206 return 1; 1207 } 1208 1209 static void 1210 ucomstart(struct tty *tp) 1211 { 1212 const int unit = UCOMUNIT(tp->t_dev); 1213 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 1214 struct ucom_buffer *ub; 1215 u_char *data; 1216 int cnt; 1217 1218 if (sc == NULL) 1219 return; 1220 1221 KASSERT(&sc->sc_lock); 1222 KASSERT(mutex_owned(&tty_lock)); 1223 if (sc->sc_dying) { 1224 return; 1225 } 1226 1227 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1228 goto out; 1229 if (sc->sc_tx_stopped) 1230 goto out; 1231 1232 if (!ttypull(tp)) 1233 goto out; 1234 1235 /* Grab the first contiguous region of buffer space. */ 1236 data = tp->t_outq.c_cf; 1237 cnt = ndqb(&tp->t_outq, 0); 1238 1239 if (cnt == 0) 1240 goto out; 1241 1242 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1243 if (ub == NULL) { 1244 SET(tp->t_state, TS_BUSY); 1245 goto out; 1246 } 1247 1248 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1249 1250 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1251 SET(tp->t_state, TS_BUSY); 1252 1253 if (cnt > sc->sc_obufsize) 1254 cnt = sc->sc_obufsize; 1255 1256 if (sc->sc_methods->ucom_write != NULL) 1257 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1258 ub->ub_data, data, &cnt); 1259 else 1260 memcpy(ub->ub_data, data, cnt); 1261 1262 ub->ub_len = cnt; 1263 ub->ub_index = 0; 1264 1265 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1266 1267 softint_schedule(sc->sc_si); 1268 1269 out: 1270 return; 1271 } 1272 1273 void 1274 ucomstop(struct tty *tp, int flag) 1275 { 1276 #if 0 1277 const int unit = UCOMUNIT(tp->t_dev); 1278 struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit); 1279 1280 mutex_enter(&sc->sc_lock); 1281 mutex_spin_enter(&tty_lock); 1282 if (ISSET(tp->t_state, TS_BUSY)) { 1283 /* obuff_full -> obuff_free? */ 1284 /* sc->sc_tx_stopped = 1; */ 1285 if (!ISSET(tp->t_state, TS_TTSTOP)) 1286 SET(tp->t_state, TS_FLUSH); 1287 } 1288 mutex_spin_exit(&tty_lock); 1289 mutex_exit(&sc->sc_lock); 1290 #endif 1291 } 1292 1293 static void 1294 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1295 usbd_status err) 1296 { 1297 struct tty *tp = sc->sc_tty; 1298 uint32_t cc = ub->ub_len; 1299 1300 KASSERT(mutex_owned(&sc->sc_lock)); 1301 1302 switch (err) { 1303 case USBD_IN_PROGRESS: 1304 ub->ub_index = ub->ub_len; 1305 break; 1306 case USBD_STALLED: 1307 ub->ub_index = 0; 1308 softint_schedule(sc->sc_si); 1309 break; 1310 case USBD_NORMAL_COMPLETION: 1311 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1312 rnd_add_uint32(&sc->sc_rndsource, cc); 1313 /*FALLTHROUGH*/ 1314 default: 1315 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1316 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1317 cc -= sc->sc_opkthdrlen; 1318 1319 mutex_spin_enter(&tty_lock); 1320 CLR(tp->t_state, TS_BUSY); 1321 if (ISSET(tp->t_state, TS_FLUSH)) 1322 CLR(tp->t_state, TS_FLUSH); 1323 else 1324 ndflush(&tp->t_outq, cc); 1325 mutex_spin_exit(&tty_lock); 1326 1327 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1328 !sc->sc_dying) { 1329 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1330 ucom_submit_write(sc, ub); 1331 1332 mutex_spin_enter(&tty_lock); 1333 (*tp->t_linesw->l_start)(tp); 1334 mutex_spin_exit(&tty_lock); 1335 } 1336 break; 1337 } 1338 } 1339 1340 static void 1341 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1342 { 1343 1344 KASSERT(mutex_owned(&sc->sc_lock)); 1345 1346 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, ub->ub_len, 1347 0, USBD_NO_TIMEOUT, ucomwritecb); 1348 1349 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1350 } 1351 1352 static void 1353 ucomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status) 1354 { 1355 struct ucom_softc *sc = (struct ucom_softc *)p; 1356 1357 mutex_enter(&sc->sc_lock); 1358 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1359 mutex_exit(&sc->sc_lock); 1360 1361 } 1362 1363 static void 1364 ucom_softintr(void *arg) 1365 { 1366 struct ucom_softc *sc = arg; 1367 1368 mutex_enter(&sc->sc_lock); 1369 struct tty *tp = sc->sc_tty; 1370 mutex_enter(&tty_lock); 1371 if (!ISSET(tp->t_state, TS_ISOPEN)) { 1372 mutex_exit(&tty_lock); 1373 mutex_exit(&sc->sc_lock); 1374 return; 1375 } 1376 mutex_exit(&tty_lock); 1377 1378 struct ucom_buffer *ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1379 1380 if (ub != NULL && ub->ub_index == 0) 1381 ucom_submit_write(sc, ub); 1382 1383 if (sc->sc_rx_unblock) 1384 ucom_read_complete(sc); 1385 1386 mutex_exit(&sc->sc_lock); 1387 } 1388 1389 static void 1390 ucom_read_complete(struct ucom_softc *sc) 1391 { 1392 int (*rint)(int, struct tty *); 1393 struct ucom_buffer *ub; 1394 struct tty *tp; 1395 1396 KASSERT(mutex_owned(&sc->sc_lock)); 1397 1398 tp = sc->sc_tty; 1399 rint = tp->t_linesw->l_rint; 1400 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1401 1402 while (ub != NULL && !sc->sc_rx_stopped) { 1403 1404 /* XXX ttyinput takes tty_lock */ 1405 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1406 /* Give characters to tty layer. */ 1407 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1408 /* Overflow: drop remainder */ 1409 ub->ub_index = ub->ub_len; 1410 } else 1411 ub->ub_index++; 1412 } 1413 1414 if (ub->ub_index == ub->ub_len) { 1415 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1416 1417 ucomsubmitread(sc, ub); 1418 1419 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1420 } 1421 } 1422 1423 sc->sc_rx_unblock = (ub != NULL); 1424 } 1425 1426 static usbd_status 1427 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1428 { 1429 usbd_status err; 1430 1431 if (sc->sc_bulkin_no != -1) { 1432 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, sc->sc_ibufsize, 1433 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ucomreadcb); 1434 1435 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1436 /* XXX: Recover from this, please! */ 1437 printf("%s: err=%s\n", __func__, usbd_errstr(err)); 1438 return err; 1439 } 1440 } 1441 1442 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1443 1444 return USBD_NORMAL_COMPLETION; 1445 } 1446 1447 void 1448 ucomreadcb(struct usbd_xfer *xfer, void *p, usbd_status status) 1449 { 1450 struct ucom_softc *sc = (struct ucom_softc *)p; 1451 struct tty *tp = sc->sc_tty; 1452 struct ucom_buffer *ub; 1453 uint32_t cc; 1454 u_char *cp; 1455 1456 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1457 1458 if (status == USBD_CANCELLED) 1459 return; 1460 1461 mutex_enter(&sc->sc_lock); 1462 if (status == USBD_IOERROR || 1463 sc->sc_dying) { 1464 DPRINTF("dying", 0, 0, 0, 0); 1465 /* Send something to wake upper layer */ 1466 (tp->t_linesw->l_rint)('\n', tp); 1467 mutex_spin_enter(&tty_lock); /* XXX */ 1468 ttwakeup(tp); 1469 mutex_spin_exit(&tty_lock); /* XXX */ 1470 mutex_exit(&sc->sc_lock); 1471 return; 1472 } 1473 1474 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1475 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1476 1477 if (status == USBD_STALLED) { 1478 if (sc->sc_bulkin_no != -1) 1479 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1480 if (sc->sc_ipipe) 1481 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 1482 ucomsubmitread(sc, ub); 1483 mutex_exit(&sc->sc_lock); 1484 return; 1485 } 1486 1487 if (status != USBD_NORMAL_COMPLETION) { 1488 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1489 mutex_exit(&sc->sc_lock); 1490 return; 1491 } 1492 1493 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1494 1495 #ifdef UCOM_DEBUG 1496 /* This is triggered by uslsa(4) occasionally. */ 1497 if ((ucomdebug > 0) && (cc == 0)) { 1498 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1499 } 1500 #endif 1501 1502 KDASSERT(cp == ub->ub_data); 1503 1504 rnd_add_uint32(&sc->sc_rndsource, cc); 1505 1506 if (sc->sc_opening) { 1507 ucomsubmitread(sc, ub); 1508 mutex_exit(&sc->sc_lock); 1509 return; 1510 } 1511 1512 ub->ub_data = usbd_get_buffer(xfer); 1513 if (sc->sc_methods->ucom_read != NULL) { 1514 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1515 &cp, &cc); 1516 ub->ub_index = (u_int)(cp - ub->ub_data); 1517 } else 1518 ub->ub_index = 0; 1519 1520 ub->ub_len = cc; 1521 1522 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1523 1524 ucom_read_complete(sc); 1525 mutex_exit(&sc->sc_lock); 1526 } 1527 1528 static void 1529 ucom_cleanup(struct ucom_softc *sc) 1530 { 1531 1532 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1533 1534 DPRINTF("aborting pipes", 0, 0, 0, 0); 1535 1536 KASSERT(mutex_owned(&sc->sc_lock)); 1537 1538 ucom_shutdown(sc); 1539 if (sc->sc_bulkin_pipe != NULL) { 1540 usbd_abort_pipe(sc->sc_bulkin_pipe); 1541 } 1542 if (sc->sc_bulkout_pipe != NULL) { 1543 usbd_abort_pipe(sc->sc_bulkout_pipe); 1544 } 1545 } 1546 1547 #endif /* NUCOM > 0 */ 1548 1549 int 1550 ucomprint(void *aux, const char *pnp) 1551 { 1552 struct ucom_attach_args *ucaa = aux; 1553 1554 if (pnp) 1555 aprint_normal("ucom at %s", pnp); 1556 if (ucaa->ucaa_portno != UCOM_UNK_PORTNO) 1557 aprint_normal(" portno %d", ucaa->ucaa_portno); 1558 return UNCONF; 1559 } 1560 1561 int 1562 ucomsubmatch(device_t parent, cfdata_t cf, 1563 const int *ldesc, void *aux) 1564 { 1565 struct ucom_attach_args *ucaa = aux; 1566 1567 if (ucaa->ucaa_portno != UCOM_UNK_PORTNO && 1568 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1569 cf->cf_loc[UCOMBUSCF_PORTNO] != ucaa->ucaa_portno) 1570 return 0; 1571 return config_match(parent, cf, aux); 1572 } 1573
Indexes created Fri Oct 17 23:09:53 GMT 2025